add support change title on share page

.github/workflows/build.yml

@@ -0,0 +1,68 @@
+# This is a basic workflow to help you get started with Actions
+
+name: CI
+
+# Controls when the workflow will run
+on:
+  # Triggers the workflow on push or pull request events but only for the "master" branch
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+  # Allows you to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+# A workflow run is made up of one or more jobs that can run sequentially or in parallel
+jobs:
+  build-backend-linux:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.18
+      - name: Build linux backend
+        run: |
+          make linux
+      - name: Upload linux backend
+        uses: actions/upload-artifact@v3
+        with:
+          name: backend-linux
+          path: |
+            msw-open-music
+            config.json
+  build-backend-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.18
+      - name: Build windows backend
+        run: |
+          go build -v
+      - name: Upload linux backend
+        uses: actions/upload-artifact@v3
+        with:
+          name: backend-windows
+          path: |
+            msw-open-music.exe
+            config.json
+  build-frontend-web:
+    runs-on: ubuntu-latest
+    env:
+      CI: false
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - name: Build web front end
+        run: |
+          make web
+      - name: upload packaged front end
+        uses: actions/upload-artifact@v3
+        with:
+          name: frontend-web
+          path: web/build

Makefile

@@ -1,4 +1,5 @@
-dist:
+.PHONY: web linux windows
+web:
 	cd web && npm install
 	cd web && npm run build
 

README-cn.md

@@ -0,0 +1,137 @@
+# MSW Open Music Project
+
+[![CI](https://github.com/heimoshuiyu/msw-open-music/actions/workflows/build.yml/badge.svg)](https://github.com/heimoshuiyu/msw-open-music/actions/workflows/build.yml)
+
+🔴 演示 Demo: <https://msw-open-music.live>
+
+> 找一首歌最好的方法是：打开一个超长的歌单，然后随机播放，直到你找到为止。
+
+一个 💪 轻量级 ⚡️ 高性能 🖥️ 跨平台的 个人音乐串流平台。管理你现有的音乐文件并在其他设备上播放。
+
+前端网页应用基于 `react.js` 和 `water.css` 构建。后端服务器程序使用 `golang` 和 `sqlite` 构建。
+
+## 介绍
+
+截图
+
+![demo1](demo1.jpg)
+
+### 功能特点
+
+- 🔎 索引现有的音乐文件，并记录文件名和文件夹元信息
+
+- 📕 使用 文件夹 📁 标签 🏷️ 评论 💬 来管理你的音乐。
+
+- 🌐 提供一个轻量高效的网页前端并支持多种语言。
+
+- 👥 支持多用户。
+
+- 🔥 调用 `ffmpeg` 配合可自定义的预设配置来转码你的音乐。
+
+- 🔗 分享音乐链接给好友！
+
+### 如果你遇到过这样的烦恼...你就是目标用户
+
+- 硬盘上存了一堆音乐，但没有一个很好的播放器. 🖴
+
+- 下载了体积非常大的无损音乐，在设备间移动很困难. 🎵
+
+- 想要在其他 电脑/手机 上听 电脑/服务器 上储存的音乐. 😋
+
+- 想给你的好友分享本地音乐. 😘
+
+## 使用方法
+
+1. 修改 `config.json` 配置文件中的 `secret` 值
+
+2. 运行后端服务器程序 `msw-open-music.exe` 或者 `msw-open-music`. 服务默认监听 8080 端口。 然后打开 <http://127.0.0.1:8080> 去创建的一个管理员帐号。
+
+前端 HTML 文件存放在 `web/build` 目录下。
+
+### 创建第一个管理员帐号
+
+第一个创建的管理员帐号会被自动激活，其他后续创建的管理员帐号需要管理员手动激活。
+
+请前往注册页面，选择角色为 管理员，然后注册第一个管理员帐号。
+
+#### config.json
+
+- `secret` 字符串类型。用来加密 session 会话。
+
+- `database_name` 字符串类型。`sqlite3` 数据库的文件名。如果不存在，会自动创建。
+- `addr` 字符串类型。监听地址和端口。
+- `ffmpeg_config_list` 列表类型。预设的 `ffmpeg` 配置文件。包含 `ffmpegConfig` 对象。
+- `file_life_time` 整数类型（秒）。临时文件的生命周期。如果临时文件超过这个时间没有被访问，那么将会被自动删除。
+- `cleaner_internal` 整数类型（秒）。`tmpfs` 检查临时文件的间隔时间。
+- `root` 字符串类型。存放临时文件的目录。默认是 `/tmp`。**Windows用户请修改成可用的目录**。如果不存在，将会被自动创建。
+- `permission` 各个 API 的权限等级。
+  - `0` 无需任何权限。
+  - `1` 需要管理员（最高级别）权限等级。
+  - `2` 需要普通用户权限等级，也就是说，管理员和普通用户都有权访问此等级的 API ，而 匿名用户 则没有权限访问。
+  - 如果你想避免 API 被滥用，可以调整下面 5 个与串流相关的 API 权限等级。
+    - `/get_file` 使用 `io.copy()` 方法串流
+    - `/get_file_direct` 使用 `http.serveFile()` 方法串流
+    - `/get_file_stream` 调用 `ffmpeg` 并串流其标准输出 `stdout`
+    - `/prepare_file_stream_direct` 调用 `ffmpeg` 预转码一个文件
+    - `/get_file_stream_direct` 使用 `http.serveFile()` 获取预转码结束的临时文件
+  - 其他在 `config.json` 中没有设定的 API 将默认拥有 `0` 的权限等级。
+
+对于 Windows 用户，请确保 `ffmpeg` 正确安装并设置环境变量。
+
+## 开发
+
+欢迎任何 issue / pull request / feature request
+
+### 主要变更历史
+
+- `v1.0.0` 第一个版本。核心串流功能可用。
+- `v1.1.0` 使用 `React` 重构前端。
+- `v1.2.0` 数据库 DBMS 课程作业。添加 用户、标签、评论 和其他功能。
+
+### ER Diagram
+
+Database Entities Relationship Diagram
+
+![ER Diagram](erdiagram.png)
+
+- `avatar` 目前没有在使用。
+
+- 第一次运行程序时，程序会自动创建一个 ID 为 `1` 的匿名用户。所有未登陆的用户都会自动登陆到这个账户。
+
+- `tmpfs` 储存在内存中，每次重新启动后端程序将会清空记录的信息。
+
+### 关于 tmpfs
+
+如果前端的播放器勾选了 `预转码` 选项，后端程序会先将文件转码到临时目录中，转码完成后再串流文件。这么做可以实现断点续传，解决由于网络波动导致 `ffmpeg` 管道链接断开而终止转码的问题。
+
+默认的临时文件夹目录是 `/tmp`，这是 Linux 系统中通用的临时目录。默认的生存时间是 600 秒（10 分钟）。如果超过这个时间没有访问该临时文件，那么后端程序将会自动删除它。
+
+### 后端 API 设计
+
+一个不需要返回任何有用数据的 API 将会返回下面的 JSON 对象
+
+```json
+{
+  "status": "OK"
+}
+```
+
+当错误发生时，后端会返回如下格式的 JSON 对象。`error` 是对错误信息的详细描述文本。
+
+```json
+{
+  "error": "Wrong password"
+}
+```
+
+不需要传递参数的 API 使用 `GET` 方法，否则使用 `POST` 方法。（忽略 RESTFUL 设计）
+
+后端使用 cookies 来实现用户会话管理。任何不带 cookies 的请求会被认为是由 匿名用户 发送的（也就是 ID 为 `1` 的用户）
+
+一些重要的源代码文件
+
+- `pkg/api/api.go` 定义各个 API 的 URL 和对应函数。
+
+- `pkg/database/sql_stmt.go` 定义 SQL 语句和做一些初始化工作。
+
+- `pkg/database/struct.go` 定义 JSON 和 数据库对象 的 数据结构。

README.md

@@ -1,125 +1,120 @@
 # MSW Open Music Project
 
-A light weight personal music streaming platform.
+[![CI](https://github.com/heimoshuiyu/msw-open-music/actions/workflows/build.yml/badge.svg)](https://github.com/heimoshuiyu/msw-open-music/actions/workflows/build.yml)
+
+🔴 Demo: <https://msw-open-music.live>
+
+[中文文档](./README-cn.md)
+
+> The best way to search for a music is to load up a huge playlist and shuffle until you find it.
+
+A 💪 light weight ⚡️ blazingly fast 🖥️ cross platform personal music streaming platform. Manage your existing music files and enjoy them on any devices.
+
+Front-end web application build with `react.js` and `water.css`, back-end build with `golang` and `sqlite`.
 
 ## Introduction
 
+Screenshot
+
 ![demo1](demo1.jpg)
 
-[TOC]
+### Features
 
-### What it can do
+- 🔎 Index your existing music files, and record file name and folder information.
 
-- Traverse the specified folder and index files whose extensions meet the requirements.
+- 📕 Use folder 📁 tag 🏷️ review 💬 to manage your music.
 
-- Listening network port. Return to the front-end web page and process API requests.
+- 🌐 Provide a light weight web application with multi-language support.
 
-- Call ffmpeg to transcode music or video.
+- 👥 Multi-user support.
 
-- Manage files' information in the database, including adding tags, comments, etc.
+- 🔥 Call `ffmpeg` with customizable preset to stream your music.
 
-### What it won't do
+- 🔗 Share music with others!
 
-- Modify your file.
+### Try it if you...
 
-- Read music metadata (for example, composer, album, genre).
+- Already saved a lot of music files on disk. 🖴
 
-- Detect file changes (Need to manually update the database).
+- Downloaded tons of huge lossless music. 🎵
 
-## ER Diagram
+- Wants to stream your music files from PC/Server to PC/phone. 😋
 
-Entities Relationship Diagram
+- Wants to share your stored music. 😘
-
-![ER Diagram](erdiagram.png)
-
-- `avatar` entity may change in future rc version.
-
-- The first time you run the program, the server will create an anonymous user with id 1. All users who are not logged in will be automatically logged in to this account.
-
-- `tmpfs` is store in memory, which will be empty everytime server restart.
-
-## How to build
-
-Compile software from source code. If you use the pre-compiled version, you don’t need to do this.
-
-### Build the back-end server
-
-`make linux` or `make windows`
-
-The executable file is named `msw-open-music` or `msw-open-music.exe`
-
-### Build the font-end web pages
-
-To build production web page `make web`
-
-This command will go into `web` directory and install `node_modules`. Then execute `npm run build` command. The built web pages is under `web/build` directory.
-
-To start the development, run `cd web` and `npm start`
 
 ## Usage
 
-> Security Warning (v1.2.0-rc1):
+1. Modify the `secret` in `config.json`
-> 
-> The cookie stored in the client browser is encrypted using the environment variable "SESSION_KEY". The server will trust the client's cookie. Leaking this environment variable may cause security problems. This problem will be fixed in a future rc version.
-> 
-> Password is not hashed in database, which will be fixed in next rc version.
 
-Start back-end server. Server will listen on 8080 port.
+2. Run back-end server `msw-open-music.exe` or `msw-open-music`. Server will listen on 8080 port by default. Then open <http://127.0.0.1:8080> to setup first admin account.
 
-Build the font-end web page, then go to <http://127.0.0.1:8080>
+The front-end HTML files are under `web/build`
 
-By default:
+### Setup first admin account
-
-- URL matched `/api/*` will process by back-end server.
-- Others URL matched `/*` will be served files under `web/build/`
-
-### Run back-end server
-
-> Token authencation no longer support in v1.2.0 stable version.
-
-Configuration file is  `config.json`， **Please modify your `token`** 。
-
-Default `ffmpeg_threads` is 1. Seems value larger than 1 will not increase the audio encode speed.
-
-#### config.json description
-
-- `database_name` string type. The filename of `sqlite3` database. Will create if that file doesn't exist.
-- `addr` string type. The listen address and port.
-- `token` string type. Password.
-- `ffmpeg_config_list` list type, include `ffmpegConfig` object.
-- `file_life_time` integer type (second). Life time for temporary file. If the temporary file is not accessed for more than this time, back-end server will delete this file.
-- `cleaner_internal` integer type (second). Interval for `tmpfs` checking temporary file.
-- `root` string type. Directory to store temporary files. Default is `/tmp`, **please modify this directory if you are using Windows.**
-
-### Run font-end web page
-
-Open your web browser to <http://127.0.0.1:8080> you will see the web pages.
-
-### Setup the first admin account
 
 The first administrator account will be active automatically, other administrator accounts need active manually.
 
 Go to register page, select the role to admin, and register the first admin account.
 
-## About tmpfs
+#### config.json
 
-If the `Prepare` mode is enabled in the font-wed player, back-end server will convert the whole file into the temporary folder, then serve file using native method. This cqan avoid ffmpeg pipe break problem cause by unstable network connection while streaming audio.
+- `secret` string type. Secret to encrypt the session.
+
+- `database_name` string type. The filename of `sqlite3` database. Will create if that file doesn't exist.
+- `addr` string type. The listen address and port.
+- `ffmpeg_config_list` list type, include `ffmpegConfig` object.
+- `file_life_time` integer type (second). Life time for temporary file. If the temporary file is not accessed for more than this time, back-end server will delete this file.
+- `cleaner_internal` integer type (second). Interval for `tmpfs` checking temporary file.
+- `root` string type. Directory to store temporary files. Default is `/tmp`, **please modify this directory if you are using Windows.** Directory will be created if not exists.
+- `permission`. Specify each API's permission level.
+  - `0` for no permission required.
+  - `1` require admin level (highest level) permission.
+  - `2` require normal user level permission. That is, both admins and registered users can access to this URL, except anonymous users.
+  - If you want to avoid abuse of the playback API, you can adjust the permission level for these 5 playback-related APIs.
+    - `/get_file` get file with `io.copy()` method
+    - `/get_file_direct` get file with `http.serveFile()` method
+    - `/get_file_stream` call ffmpeg and stream its `stdout` output
+    - `/prepare_file_stream_direct` call ffmpeg to convert a file
+    - `/get_file_stream_direct` get the converted file with `http.serveFile()`
+  - Other URLs not metion in `config.json` will have `0` permission level by default.
+
+For windows user, make sure you have `ffmpeg` installed.
+
+## Development
+
+Any issues or pull requests are welcome.
+
+### Major changes log
+
+- `v1.0.0` First version. Implement the core streaming function.
+- `v1.1.0` Use `React` to rewrite the font-end web pages.
+- `v1.2.0` Add user, tag, review and other functions for DBMS course project.
+
+### ER Diagram
+
+Database Entities Relationship Diagram
+
+![ER Diagram](erdiagram.png)
+
+- `avatar` is not using currently
+
+- The first time you run the program, the server will create an anonymous user with id `1`. All users who are not logged in will be automatically logged in to this account.
+
+- `tmpfs` is store in memory, which will be empty everytime server restart.
+
+### About tmpfs
+
+If the `Prepare` mode is enabled in the font-wed player, back-end server will convert the whole file into the temporary folder, then serve file. This can avoid `ffmpeg` pipe break problem cause by unstable network connection while streaming audio.
 
 The default temporary folder is `/tmp`, which is a `tmpfs` file system in Linux operating system. Default life time for temporary files is 600 seconds (10 minutes). If the temporary file is not accessed for more than this time, back-end server will delete this file.
 
-## Change log
+### Back-end API design
-
-- `v1.0.0` First version. Ready to use in production environment.
-- `v1.1.0` Use `React` to rewrite the font-end web pages (Previous using `Vue`).
-- `v1.2.0` Add user, tag, review, video functions for DBMS course work.
-
-## Back-end API references
 
 API does not need to respond any data will return the following JSON object.
 
 ```json
 {
-    "status": "OK"
+  "status": "OK"
 }
 ```
 
@@ -127,46 +122,18 @@ Sometime errors happen, server will return the following JSON object, which `err
 
 ```json
 {
-    "error": "Wrong password"
+  "error": "Wrong password"
 }
 ```
 
 API does not need to send any data should use `GET` method, otherwise use `POST` method.
 
-Server use cookies to authencate a user. Any request without cookies will be consider from an anonymouse user.
+Server use cookies to authenticate a user. Any request without cookies will be consider from an anonymous user (aka. user with ID `1`).
 
-Some import source code file:
+Some important source code files:
 
 - `pkg/api/api.go` define URL
 
 - `pkg/database/sql_stmt.go` define SQL queries and do the init job.
 
 - `pkg/database/struct.go` define JSON structures for database entities.
-
-## Font-end web pages
-
-- `/#/` Get random files.
-
-- `/#/files` Search files.
-
-- `/#/files/39` Information of the which id is 39.
-
-- `/#/files/39/review` Reviews of the file with file id 39.
-
-- `/#/files/39/share` Share page with the file id 39.
-
-- `/#/folders` Search folders.
-
-- `/#/folders/2614` Files in folder which id is 2614.
-
-- `/#/manage` Manage page.
-
-- `/#/manage/users` List users.
-
-- `/#/manage/users/1` Information of user whose id is 1.
-
-- `/#/manage/tags` List tags.
-
-- `/#/manage/tags/1` Information of tag which id is 1.
-
-- `/#/manage/feedbacks` List feedbacks.

config.json

@@ -38,8 +38,39 @@
       },
       { "name": "MP3 128k", "args": "-c:a mp3 -ab 128k -vn", "format": "mp3" },
       { "name": "MP3 320k", "args": "-c:a mp3 -ab 320k -vn", "format": "mp3" },
-      { "name": "全损音质 8k", "args": "-c:a libopus -ab 8k -vn", "format": "webm" }
+      {
-    ]
+        "name": "全损音质 8k",
+        "args": "-c:a libopus -ab 8k -vn",
+        "format": "webm"
+      }
+    ],
+    "permission": {
+      "/register": 0,
+      "/get_file": 0,
+      "/get_file_direct": 0,
+      "/get_file_stream": 0,
+      "/prepare_file_stream_direct": 0,
+      "/get_file_stream_direct": 0,
+      "/walk": 1,
+      "/reset": 1,
+      "/update_user_active": 1,
+      "/get_feedbacks": 1,
+      "/delete_feedback": 1,
+      "/delete_file": 1,
+      "/update_filename": 1,
+      "/reset_filename": 1,
+      "/reset_foldername": 1,
+      "/update_foldername": 1,
+      "/insert_tag": 1,
+      "/update_tag": 1,
+      "/delete_tag": 1,
+      "/put_tag_on_file": 1,
+      "/delete_tag_on_file": 1,
+      "/delete_review": 2,
+      "/update_review": 2,
+      "/update_user_password": 2,
+      "/update_username": 2
+    }
   },
   "tmpfs": {
     "file_life_time": 600,

docs/problem_description.md

@@ -1,36 +0,0 @@
-# DBMS Group Project Problem Description
-
-- Group 1
-
-The Internet infrastructure construction has made the network speed development faster. With the fast Internet, people are gradually migrating various data and services to the cloud. For example, NetEase Cloud Music, Spotify, and Apple Music, we call them streaming media platforms. The definition of streaming media platform is that users purchase the digital copyright of music and then play the music online on the platform.
-
-Generally speaking, users cannot buy music that is not available on the platform. The user cannot download the digital file of the music (the user purchases the right to play instead of the right to copy). Users cannot upload their music to the platform.
-
-However, in the era of digital copyright, there are still many advantages to getting original music files, such as no need to install a dedicated player; free copying to other devices (without violating copyright); no risk of music unavailable from the platform; no play records and privacy will be tracked by the platform.
-
-Some people don't like streaming platforms. They like to collect music (download or buy CDs) and save it on their computers. But as more and more music is collected (over 70,000 songs and in total size of 800GB), it becomes very difficult to manage files. It is difficult for them to find where the songs they want to listen to are saved. Also, lossless music files are large and difficult to play online.
-
-As long as there no such "Self-hosted music streaming platform" software available, we decided to develop a project based on database knowledge to help people who have collected a lot of music to enjoy their music simply.
-
-We will handle various relevant types of data in our database. Including song name, album name, file size, update date, rating, comment, user information, etc. They are highly relevant, so using a relational database will be a good choice.
-
-The features of the project we designed are as follows:
-
-- Open. Independent front-end (GUI) and back-end (server program), using API to communicate.
-- Easy to use. Minimize dependencies, allowing users to configure quickly and simply.
-- Lightweight. The program is small in size and quick to install.
-- High performance. Only do what should be done, no features that will lead to poor performance.
-- Cross-platform. The project can run on computers, mobile phones, Linux, Windows, macOS, and X86 and ARM processor architectures.
-- Extensibility. Access to cloud OSS (Object Storage Service), reverse proxy, or other external software.
-
-Our project has the following functions:
-
-- Index file. Index local files into the database.
-- Search. Search for music based on name/album/tag/comment, sorted by rating or other columns.
-- Play. Play music online, play music randomly and play music at a low bit rate on a bad network.
-- User management. Users can register and log in.
-- Comment. Users can give a like or comment on the music.
-- Management. The administrator can upload music, update or delete the database.
-- Share. Generate a link to share the music with others.
-
-After research and discussion, in order to meet the above requirements, we decided to use the Golang programming language on the backend. SQLite as a database program. Vue as the front-end GUI interface.

go.mod

@@ -1,8 +1,11 @@
 module msw-open-music
 
-go 1.16
+go 1.18
 
 require (
 	github.com/gorilla/sessions v1.2.1
-	github.com/mattn/go-sqlite3 v1.14.7
+	github.com/mattn/go-sqlite3 v1.14.14
+	golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d
 )
+
+require github.com/gorilla/securecookie v1.1.1 // indirect

go.sum

@@ -2,5 +2,7 @@ github.com/gorilla/securecookie v1.1.1 h1:miw7JPhV+b/lAHSXz4qd/nN9jRiAFV5FwjeKyC
 github.com/gorilla/securecookie v1.1.1/go.mod h1:ra0sb63/xPlUeL+yeDciTfxMRAA+MP+HVt/4epWDjd4=
 github.com/gorilla/sessions v1.2.1 h1:DHd3rPN5lE3Ts3D8rKkQ8x/0kqfeNmBAaiSi+o7FsgI=
 github.com/gorilla/sessions v1.2.1/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
-github.com/mattn/go-sqlite3 v1.14.7 h1:fxWBnXkxfM6sRiuH3bqJ4CfzZojMOLVc0UTsTglEghA=
+github.com/mattn/go-sqlite3 v1.14.14 h1:qZgc/Rwetq+MtyE18WhzjokPD93dNqLGNT3QJuLvBGw=
-github.com/mattn/go-sqlite3 v1.14.7/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
+github.com/mattn/go-sqlite3 v1.14.14/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
+golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d h1:sK3txAijHtOK88l68nt020reeT1ZdKLIYetKl95FzVY=
+golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=

pkg/api/api.go

@@ -94,11 +94,11 @@ func NewAPI(config commonconfig.Config) (*API, error) {
 	apiMux.HandleFunc("/update_review", api.HandleUpdateReview)
 	apiMux.HandleFunc("/delete_review", api.HandleDeleteReview)
 	apiMux.HandleFunc("/get_reviews_by_user", api.HandleGetReviewsByUser)
-	// below needs admin
+	// database
 	apiMux.HandleFunc("/walk", api.HandleWalk)
 	apiMux.HandleFunc("/reset", api.HandleReset)
 
-	mux.Handle("/api/v1/", http.StripPrefix("/api/v1", apiMux))
+	mux.Handle("/api/v1/", http.StripPrefix("/api/v1", api.PermissionMiddleware(apiMux)))
 	mux.Handle("/", http.StripPrefix("/", http.FileServer(http.Dir("web/build"))))
 
 	return api, nil

pkg/api/handle_database_manage.go

@@ -14,12 +14,6 @@ type WalkRequest struct {
 
 func (api *API) HandleReset(w http.ResponseWriter, r *http.Request) {
 	var err error
-	// check admin
-	err = api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
 
 	log.Println("[api] Reset database")
 
@@ -46,13 +40,6 @@ func (api *API) HandleWalk(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// check admin
-	err = api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	// check root empty
 	if walkRequest.Root == "" {
 		api.HandleErrorString(w, r, `key "root" can't be empty`)

pkg/api/handle_error.go

@@ -2,22 +2,22 @@ package api
 
 import (
 	"encoding/json"
+	"errors"
 	"log"
 	"net/http"
-	"errors"
 )
 
 var (
-	ErrNotLoggedIn = errors.New("not logged in")
+	ErrNotLoggedIn   = errors.New("not logged in")
-	ErrNotAdmin = errors.New("not admin")
+	ErrNotAdmin      = errors.New("not admin")
-	ErrEmpty = errors.New("Empty field detected, please fill in all fields")
+	ErrEmpty         = errors.New("Empty field detected, please fill in all fields")
-	ErrAnonymous = errors.New("Anonymous user detected, please login")
+	ErrAnonymous     = errors.New("Anonymous user detected, please login")
-	ErrNotActive = errors.New("User is not active")
+	ErrNotActive     = errors.New("User is not active")
 	ErrWrongPassword = errors.New("Wrong password")
 )
 
 type Error struct {
-  Error string `json:"error,omitempty"`
+	Error string `json:"error,omitempty"`
 }
 
 func (api *API) HandleError(w http.ResponseWriter, r *http.Request, err error) {

pkg/api/handle_feedback.go

@@ -56,13 +56,6 @@ type GetFeedbacksResponse struct {
 }
 
 func (api *API) HandleGetFeedbacks(w http.ResponseWriter, r *http.Request) {
-	// check if admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	feedbacks, err := api.Db.GetFeedbacks()
 	if err != nil {
 		api.HandleError(w, r, err)
@@ -85,15 +78,8 @@ type DeleteFeedbackRequest struct {
 }
 
 func (api *API) HandleDeleteFeedback(w http.ResponseWriter, r *http.Request) {
-	// check if admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &DeleteFeedbackRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -105,6 +91,5 @@ func (api *API) HandleDeleteFeedback(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-
 	api.HandleOK(w, r)
 }

pkg/api/handle_manage_file.go

@@ -2,8 +2,8 @@ package api
 
 import (
 	"encoding/json"
-	"net/http"
 	"log"
+	"net/http"
 )
 
 type DeleteFileRequest struct {
@@ -11,15 +11,8 @@ type DeleteFileRequest struct {
 }
 
 func (api *API) HandleDeleteFile(w http.ResponseWriter, r *http.Request) {
-	// check admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &DeleteFileRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -42,15 +35,8 @@ type UpdateFilenameRequest struct {
 }
 
 func (api *API) HandleUpdateFilename(w http.ResponseWriter, r *http.Request) {
-	// check admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &UpdateFilenameRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -72,15 +58,8 @@ type ResetFilenameRequest struct {
 }
 
 func (api *API) HandleResetFilename(w http.ResponseWriter, r *http.Request) {
-	// check admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &ResetFilenameRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return

pkg/api/handle_manage_folder.go

@@ -11,15 +11,8 @@ type ResetFoldernameRequest struct {
 }
 
 func (api *API) HandleResetFoldername(w http.ResponseWriter, r *http.Request) {
-	// check admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &ResetFoldernameRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusBadRequest)
 		return
@@ -49,13 +42,6 @@ func (api *API) HandleUpdateFoldername(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// check is admin
-	err = api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	log.Println("[api] Update foldername folderID", req.ID, req.Foldername)
 
 	err = api.Db.UpdateFoldername(req.ID, req.Foldername)

pkg/api/handle_review.go

@@ -116,13 +116,8 @@ func (api *API) CheckUserCanModifyReview(w http.ResponseWriter, r *http.Request,
 		return err
 	}
 
-	err = api.CheckNotAnonymous(w, r)
+	userLevel := api.GetUserLevel(r)
-	if err != nil {
+	if userLevel != database.RoleAdmin {
-		return err
-	}
-
-	err = api.CheckAdmin(w, r)
-	if err != nil {
 		userID, err := api.GetUserID(w, r)
 		if err != nil {
 			return err

pkg/api/handle_tag.go

@@ -34,15 +34,8 @@ type InsertTagResponse struct {
 }
 
 func (api *API) HandleInsertTag(w http.ResponseWriter, r *http.Request) {
-	// check if user is admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &database.Tag{}
-	err = json.NewDecoder(r.Body).Decode(&req)
+	err := json.NewDecoder(r.Body).Decode(&req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -67,7 +60,7 @@ func (api *API) HandleInsertTag(w http.ResponseWriter, r *http.Request) {
 	}
 
 	resp := &InsertTagResponse{Tag: tag}
-	
+
 	err = json.NewEncoder(w).Encode(resp)
 	if err != nil {
 		api.HandleError(w, r, err)
@@ -107,15 +100,8 @@ func (api *API) HandleGetTagInfo(w http.ResponseWriter, r *http.Request) {
 }
 
 func (api *API) HandleUpdateTag(w http.ResponseWriter, r *http.Request) {
-	// check if user is admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &database.Tag{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -135,15 +121,8 @@ type DeleteTagRequest struct {
 }
 
 func (api *API) HandleDeleteTag(w http.ResponseWriter, r *http.Request) {
-	// check if user is admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &DeleteTagRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -159,4 +138,3 @@ func (api *API) HandleDeleteTag(w http.ResponseWriter, r *http.Request) {
 
 	api.HandleOK(w, r)
 }
-

pkg/api/handle_tag_and_file.go

@@ -13,15 +13,8 @@ type PutTagOnFileRequest struct {
 }
 
 func (api *API) HandlePutTagOnFile(w http.ResponseWriter, r *http.Request) {
-	// check if the user is admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &PutTagOnFileRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -61,7 +54,7 @@ func (api *API) HandleGetTagsOnFile(w http.ResponseWriter, r *http.Request) {
 		api.HandleError(w, r, err)
 		return
 	}
-	
+
 	log.Println("[api] Get tags on file request:", req)
 
 	tags, err := api.Db.GetTagsOnFile(req.ID)
@@ -87,15 +80,8 @@ type DeleteTagOnFileRequest struct {
 }
 
 func (api *API) HandleDeleteTagOnFile(w http.ResponseWriter, r *http.Request) {
-	// check if the user is admin
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &DeleteTagOnFileRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return

pkg/api/handle_user.go

@@ -142,44 +142,6 @@ func (api *API) HandleRegister(w http.ResponseWriter, r *http.Request) {
 	api.HandleOK(w, r)
 }
 
-func (api *API) CheckAdmin(w http.ResponseWriter, r *http.Request) error {
-	session, _ := api.store.Get(r, api.defaultSessionName)
-	userId, ok := session.Values["userId"]
-	if !ok {
-		return ErrNotLoggedIn
-	}
-
-	user, err := api.Db.GetUserById(userId.(int64))
-	if err != nil {
-		return err
-	}
-
-	if user.Role != database.RoleAdmin {
-		return ErrNotAdmin
-	}
-
-	return nil
-}
-
-func (api *API) CheckNotAnonymous(w http.ResponseWriter, r *http.Request) error {
-	session, _ := api.store.Get(r, api.defaultSessionName)
-	userId, ok := session.Values["userId"]
-	if !ok {
-		return ErrNotLoggedIn
-	}
-
-	user, err := api.Db.GetUserById(userId.(int64))
-	if err != nil {
-		return err
-	}
-
-	if user.Role == database.RoleAnonymous {
-		return ErrAnonymous
-	}
-
-	return nil
-}
-
 func (api *API) GetUserID(w http.ResponseWriter, r *http.Request) (int64, error) {
 	session, _ := api.store.Get(r, api.defaultSessionName)
 	userId, ok := session.Values["userId"]
@@ -218,14 +180,8 @@ type UpdateUserActiveRequest struct {
 }
 
 func (api *API) HandleUpdateUserActive(w http.ResponseWriter, r *http.Request) {
-	err := api.CheckAdmin(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
-
 	req := &UpdateUserActiveRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -245,16 +201,11 @@ type UpdateUsernameRequest struct {
 }
 
 func (api *API) HandleUpdateUsername(w http.ResponseWriter, r *http.Request) {
-	// reject anonymous user
+	// middileware reject anonymous user
-	err := api.CheckNotAnonymous(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
 
 	req := &UpdateUsernameRequest{}
 
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return
@@ -326,15 +277,10 @@ type UpdateUserPasswordRequest struct {
 }
 
 func (api *API) HandleUpdateUserPassword(w http.ResponseWriter, r *http.Request) {
-	// reject anonymous user
+	// middleware reject anonymous user
-	err := api.CheckNotAnonymous(w, r)
-	if err != nil {
-		api.HandleError(w, r, err)
-		return
-	}
 
 	req := &UpdateUserPasswordRequest{}
-	err = json.NewDecoder(r.Body).Decode(req)
+	err := json.NewDecoder(r.Body).Decode(req)
 	if err != nil {
 		api.HandleError(w, r, err)
 		return

pkg/api/middleware.go

@@ -0,0 +1,55 @@
+package api
+
+import (
+	"errors"
+	"net/http"
+)
+
+func (api *API) PermissionMiddleware(next http.Handler) http.Handler {
+	// 0 anonymous user
+	// 1 admin
+	// 2 normal user
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// get permission of URL
+		permission, ok := api.APIConfig.Permission[r.URL.Path]
+		// 0 means no permission required
+		if !ok || permission == 0 {
+			next.ServeHTTP(w, r)
+			return
+		}
+
+		// ger user permission level
+		userLevel := api.GetUserLevel(r)
+
+		// admin has root (highest) permission level 1
+		if userLevel == 1 {
+			next.ServeHTTP(w, r)
+			return
+		}
+
+		// anonymous userLevel 0 don't have any permission
+		// check permission level for other users
+		if userLevel == 0 || userLevel > permission {
+			api.HandleError(w, r, errors.New("No enougth permission"))
+			return
+		}
+
+		next.ServeHTTP(w, r)
+	})
+}
+
+func (api *API) GetUserLevel(r *http.Request) int64 {
+	session, _ := api.store.Get(r, api.defaultSessionName)
+	userId, ok := session.Values["userId"]
+	if !ok {
+		// not logined user is considered anonymous user
+		return 0
+	}
+
+	user, err := api.Db.GetUserById(userId.(int64))
+	if err != nil {
+		return 0
+	}
+
+	return user.Role
+}

pkg/commonconfig/config.go

@@ -6,12 +6,13 @@ type Config struct {
 }
 
 type APIConfig struct {
-	DatabaseName     string         `json:"database_name"`
+	DatabaseName     string           `json:"database_name"`
-	SingleThread     bool           `json:"single_thread,default=true"`
+	SingleThread     bool             `json:"single_thread,default=true"`
-	Addr             string         `json:"addr"`
+	Addr             string           `json:"addr"`
-	FfmpegThreads    int64          `json:"ffmpeg_threads"`
+	FfmpegThreads    int64            `json:"ffmpeg_threads"`
-	FfmpegConfigList []FfmpegConfig `json:"ffmpeg_config_list"`
+	FfmpegConfigList []FfmpegConfig   `json:"ffmpeg_config_list"`
-	SECRET           string         `json:"secret"`
+	SECRET           string           `json:"secret"`
+	Permission       map[string]int64 `json:"permission"`
 }
 
 type FfmpegConfigList struct {

pkg/database/database.go

@@ -8,20 +8,20 @@ import (
 )
 
 type Database struct {
-	sqlConn *sql.DB
+	sqlConn          *sql.DB
-	stmt    *Stmt
+	stmt             *Stmt
 	singleThreadLock SingleThreadLock
 }
 
 func NewSingleThreadLock(enabled bool) SingleThreadLock {
 	return SingleThreadLock{
-		lock: sync.Mutex{},
+		lock:    sync.Mutex{},
 		enabled: enabled,
 	}
 }
 
 type SingleThreadLock struct {
-	lock sync.Mutex
+	lock    sync.Mutex
 	enabled bool
 }
 
@@ -54,8 +54,8 @@ func NewDatabase(dbName string, singleThread bool) (*Database, error) {
 
 	// new database
 	database := &Database{
-		sqlConn: sqlConn,
+		sqlConn:          sqlConn,
-		stmt:    stmt,
+		stmt:             stmt,
 		singleThreadLock: NewSingleThreadLock(singleThread),
 	}
 

pkg/database/error.go

@@ -5,6 +5,6 @@ import (
 )
 
 var (
-	ErrNotFound = errors.New("object not found")
+	ErrNotFound    = errors.New("object not found")
 	ErrTagNotFound = errors.New("tag not found")
 )

pkg/database/method_tag.go

@@ -57,7 +57,7 @@ func (database *Database) GetTags() ([]*Tag, error) {
 	return tags, nil
 }
 
-func (database *Database) UpdateTag(tag *Tag) (error) {
+func (database *Database) UpdateTag(tag *Tag) error {
 	database.singleThreadLock.Lock()
 	defer database.singleThreadLock.Unlock()
 

pkg/database/method_user.go

@@ -1,5 +1,10 @@
 package database
 
+import (
+	"golang.org/x/crypto/bcrypt"
+	"log"
+)
+
 func (database *Database) Login(username string, password string) (*User, error) {
 	database.singleThreadLock.Lock()
 	defer database.singleThreadLock.Unlock()
@@ -7,10 +12,17 @@ func (database *Database) Login(username string, password string) (*User, error)
 	user := &User{}
 
 	// get user from database
-	err := database.stmt.getUser.QueryRow(username, password).Scan(&user.ID, &user.Username, &user.Role, &user.Active, &user.AvatarId)
+	err := database.stmt.getUser.QueryRow(username).Scan(&user.ID, &user.Username, &user.Password, &user.Role, &user.Active, &user.AvatarId)
 	if err != nil {
 		return user, err
 	}
+
+	// validate password
+	err = database.ComparePassword(user.Password, password)
+	if err != nil {
+		return user, err
+	}
+
 	return user, nil
 }
 
@@ -44,6 +56,9 @@ func (database *Database) Register(username string, password string, usertype in
 		active = true
 	}
 
+	// encrypt password
+	password = database.EncryptPassword(password)
+
 	database.singleThreadLock.Lock()
 	defer database.singleThreadLock.Unlock()
 
@@ -130,9 +145,27 @@ func (database *Database) UpdateUserPassword(id int64, password string) error {
 	database.singleThreadLock.Lock()
 	defer database.singleThreadLock.Unlock()
 
+	// encrypt password
+	password = database.EncryptPassword(password)
+
 	_, err := database.stmt.updateUserPassword.Exec(password, id)
 	if err != nil {
 		return err
 	}
 	return nil
 }
+
+func (database *Database) EncryptPassword(password string) string {
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.MinCost)
+	if err != nil {
+		log.Println("[database] Failed to hash password, using plaintext password")
+		return password
+	}
+
+	return string(hash)
+}
+
+func (database *Database) ComparePassword(hashedPassword string, plainTextPassword string) error {
+	err := bcrypt.CompareHashAndPassword([]byte(hashedPassword), []byte(plainTextPassword))
+	return err
+}

pkg/database/sql_stmt.go

@@ -193,7 +193,7 @@ var countUserQuery = `SELECT count(*) FROM users;`
 
 var countAdminQuery = `SELECT count(*) FROM users WHERE role= 1;`
 
-var getUserQuery = `SELECT id, username, role, active, avatar_id FROM users WHERE username = ? AND password = ? LIMIT 1;`
+var getUserQuery = `SELECT id, username, password, role, active, avatar_id FROM users WHERE username = ? LIMIT 1;`
 
 var getUsersQuery = `SELECT id, username, role, active, avatar_id FROM users;`
 
@@ -759,7 +759,7 @@ func NewPreparedStatement(sqlConn *sql.DB) (*Stmt, error) {
 	if err != nil {
 		return nil, err
 	}
-	
+
 	// init updateFilename
 	stmt.updateFilename, err = sqlConn.Prepare(updateFilenameQuery)
 	if err != nil {

web/package.json

@@ -1,6 +1,6 @@
 {
   "name": "msw-open-music-react",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "private": true,
   "dependencies": {
     "@testing-library/jest-dom": "^5.15.0",

web/src/App.js

@@ -19,105 +19,135 @@ import UserStatus from "./component/UserStatus";
 import ReviewPage from "./component/ReviewPage";
 import UserProfile from "./component/UserProfile";
 import FeedbackPage from "./component/FeedbackPage";
-import { useState } from "react";
+import { useEffect, useState } from "react";
+import { Tr, langCodeContext, LANG_OPTIONS } from "./translate";
 
 function App() {
   const [playingFile, setPlayingFile] = useState({});
   const [user, setUser] = useState({});
+  const [langCode, setLangCode] = useState("en_US");
+
+  // select language
+  useEffect(() => {
+    const browserCode = window.navigator.language;
+    for (const key in LANG_OPTIONS) {
+      for (const i in LANG_OPTIONS[key].matches) {
+        const code = LANG_OPTIONS[key].matches[i];
+        if (code === browserCode) {
+          setLangCode(key);
+          return;
+        }
+      }
+    }
+    // fallback to english
+    setLangCode('en-US');
+  }, []);
+
   return (
     <div className="base">
-      <Router>
+      <langCodeContext.Provider value={{ langCode, setLangCode }}>
-        <header className="header">
+        <Router>
-          <h3 className="title">
+          <header className="header">
-            <img src="favicon.png" alt="logo" className="logo" />
+            <h3 className="title">
-            <span className="title-text">MSW Open Music Project</span>
+              <img src="favicon.png" alt="logo" className="logo" />
-            <UserStatus user={user} setUser={setUser} />
+              <span className="title-text">MSW Open Music Project</span>
-          </h3>
+              <UserStatus user={user} setUser={setUser} />
-          <nav className="nav">
+            </h3>
-            <NavLink to="/" className="nav-link">
+            <nav className="nav">
-              Feeling luckly
+              <NavLink to="/" className="nav-link">
-            </NavLink>
+                {Tr("Feeling luckly")}
-            <NavLink to="/files" className="nav-link">
+              </NavLink>
-              Files
+              <NavLink to="/files" className="nav-link">
-            </NavLink>
+                {Tr("Files")}
-            <NavLink to="/folders" className="nav-link">
+              </NavLink>
-              Folders
+              <NavLink to="/folders" className="nav-link">
-            </NavLink>
+                {Tr("Folders")}
-            <NavLink to="/manage" className="nav-link">
+              </NavLink>
-              Manage
+              <NavLink to="/manage" className="nav-link">
-            </NavLink>
+                {Tr("Manage")}
-          </nav>
+              </NavLink>
-        </header>
+            </nav>
-        <main>
+          </header>
-          <Routes>
+          <main>
-            <Route
+            <Routes>
-              index
+              <Route
-              path="/"
+                index
-              element={<GetRandomFiles setPlayingFile={setPlayingFile} />}
+                path="/"
-            />
+                element={<GetRandomFiles setPlayingFile={setPlayingFile} />}
-            <Route
+              />
-              path="/files"
+              <Route
-              element={<SearchFiles setPlayingFile={setPlayingFile} />}
+                path="/files"
-            />
+                element={<SearchFiles setPlayingFile={setPlayingFile} />}
-            <Route
+              />
-              path="/folders"
+              <Route
-              element={<SearchFolders setPlayingFile={setPlayingFile} />}
+                path="/folders"
-            />
+                element={<SearchFolders setPlayingFile={setPlayingFile} />}
-            <Route
+              />
-              path="/folders/:id"
+              <Route
-              element={<FilesInFolder setPlayingFile={setPlayingFile} />}
+                path="/folders/:id"
-            />
+                element={<FilesInFolder setPlayingFile={setPlayingFile} />}
-            <Route
+              />
-              path="/manage"
+              <Route
-              element={<Manage user={user} setUser={setUser} />}
+                path="/manage"
-            />
+                element={
-            <Route
+                  <Manage
-              path="/manage/feedbacks"
+                    user={user}
-              element={<FeedbackPage user={user} />}
+                    setUser={setUser}
-            />
+                    setLangCode={setLangCode}
-            <Route
+                  />
-              path="/manage/login"
+                }
-              element={<Login user={user} setUser={setUser} />}
+              />
-            />
+              <Route
-            <Route
+                path="/manage/feedbacks"
-              path="/manage/register"
+                element={<FeedbackPage user={user} />}
-              element={<Register user={user} setUser={setUser} />}
+              />
-            />
+              <Route
-            <Route path="/manage/tags" element={<Tags user={user} />} />
+                path="/manage/login"
-            <Route path="/manage/tags/:id" element={<EditTag user={user} />} />
+                element={<Login user={user} setUser={setUser} />}
-            <Route
+              />
-              path="/manage/reviews/:id"
+              <Route
-              element={<EditReview user={user} />}
+                path="/manage/register"
-            />
+                element={<Register user={user} setUser={setUser} />}
-            <Route
+              />
-              path="/manage/users"
+              <Route path="/manage/tags" element={<Tags user={user} />} />
-              element={<ManageUser user={user} setUser={setUser} />}
+              <Route
-            />
+                path="/manage/tags/:id"
-            <Route
+                element={<EditTag user={user} />}
-              path="/manage/users/:id"
+              />
-              element={<UserProfile user={user} setUser={setUser} />}
+              <Route
-            />
+                path="/manage/reviews/:id"
-            <Route
+                element={<EditReview user={user} />}
-              path="/files/:id"
+              />
-              element={<FileInfo setPlayingFile={setPlayingFile} />}
+              <Route
-            />
+                path="/manage/users"
-            <Route
+                element={<ManageUser user={user} setUser={setUser} />}
-              path="/files/:id/share"
+              />
-              element={<Share setPlayingFile={setPlayingFile} />}
+              <Route
-            />
+                path="/manage/users/:id"
-            <Route
+                element={<UserProfile user={user} setUser={setUser} />}
-              path="/files/:id/review"
+              />
-              element={
+              <Route
-                <ReviewPage user={user} setPlayingFile={setPlayingFile} />
+                path="/files/:id"
-              }
+                element={<FileInfo setPlayingFile={setPlayingFile} />}
-            />
+              />
-          </Routes>
+              <Route
-        </main>
+                path="/files/:id/share"
-        <AudioPlayer
+                element={<Share setPlayingFile={setPlayingFile} />}
-          playingFile={playingFile}
+              />
-          setPlayingFile={setPlayingFile}
+              <Route
-        />
+                path="/files/:id/review"
-      </Router>
+                element={
+                  <ReviewPage user={user} setPlayingFile={setPlayingFile} />
+                }
+              />
+            </Routes>
+          </main>
+          <AudioPlayer
+            playingFile={playingFile}
+            setPlayingFile={setPlayingFile}
+          />
+        </Router>
+      </langCodeContext.Provider>
     </div>
   );
 }

web/src/component/AudioPlayer.js

@@ -3,6 +3,7 @@ import { useNavigate } from "react-router";
 import { CalcReadableFilesizeDetail } from "./Common";
 import FfmpegConfig from "./FfmpegConfig";
 import FileDialog from "./FileDialog";
+import { Tr } from "../translate";
 
 function AudioPlayer(props) {
   // props.playingFile
@@ -67,7 +68,7 @@ function AudioPlayer(props) {
 
   return (
     <footer className="vertical">
-      <h5>Player status</h5>
+      <h5>{Tr("Player status")}</h5>
       {props.playingFile.id && (
         <span>
           <FileDialog
@@ -97,7 +98,7 @@ function AudioPlayer(props) {
             {CalcReadableFilesizeDetail(props.playingFile.filesize)}
           </button>
 
-          {isPreparing && <button disabled>Preparing...</button>}
+          {isPreparing && <button disabled>{Tr("Preparing...")}</button>}
 
           {playingURL !== "" && (
             <button
@@ -105,7 +106,7 @@ function AudioPlayer(props) {
                 props.setPlayingFile({});
               }}
             >
-              Stop
+              {Tr("Stop")}
             </button>
           )}
         </span>
@@ -138,7 +139,7 @@ function AudioPlayer(props) {
             );
           }}
         >
-          Stop Timer
+          {Tr("Stop Timer")}
         </button>
       </span>
 
@@ -149,7 +150,7 @@ function AudioPlayer(props) {
             onChange={(event) => setLoop(event.target.checked)}
             type="checkbox"
           />
-          <label>Loop</label>
+          <label>{Tr("Loop")}</label>
         </span>
 
         <span>
@@ -158,7 +159,7 @@ function AudioPlayer(props) {
             onChange={(event) => setRaw(event.target.checked)}
             type="checkbox"
           />
-          <label>Raw</label>
+          <label>{Tr("Raw")}</label>
         </span>
 
         {!raw && (
@@ -168,7 +169,7 @@ function AudioPlayer(props) {
               onChange={(event) => setPrepare(event.target.checked)}
               type="checkbox"
             />
-            <label>Prepare</label>
+            <label>{Tr("Prepare")}</label>
           </span>
         )}
       </span>

web/src/component/Database.js

@@ -1,11 +1,15 @@
-import { useState, useEffect } from "react";
+import { useState, useEffect, useContext } from "react";
+import { Tr, tr, langCodeContext } from "../translate";
 
 function Database() {
   const [walkPath, setWalkPath] = useState("");
-  const [patternString, setPatternString] = useState("wav flac mp3 ogg m4a mka");
+  const [patternString, setPatternString] = useState(
+    "wav flac mp3 ogg m4a mka"
+  );
   const [tags, setTags] = useState([]);
   const [selectedTags, setSelectedTags] = useState([]);
   const [updating, setUpdating] = useState(false);
+  const { langCode } = useContext(langCodeContext);
 
   function getTags() {
     fetch("/api/v1/get_tags")
@@ -60,21 +64,21 @@ function Database() {
   }
   return (
     <div>
-      <h3>Update Database</h3>
+      <h3>{Tr("Update Database")}</h3>
       <input
         type="text"
         value={walkPath}
-        placeholder="walk path"
+        placeholder={tr("walk path", langCode)}
         onChange={(e) => setWalkPath(e.target.value)}
       />
       <input
         type="text"
         value={patternString}
-        placeholder="pattern wav flac mp3"
+        placeholder={tr("pattern wav flac mp3", langCode)}
         onChange={(e) => setPatternString(e.target.value)}
       />
       <div>
-        <h4>Tags</h4>
+        <h4>{Tr("Tags")}</h4>
         {tags.map((tag) => (
           <div key={tag.id}>
             <input
@@ -101,7 +105,7 @@ function Database() {
         }}
         disabled={updating}
       >
-        {updating ? "Updating..." : "Update Database"}
+        {updating ? Tr("Updating...") : Tr("Update Database")}
       </button>
     </div>
   );

web/src/component/EditReview.js

@@ -1,9 +1,11 @@
-import { useEffect, useState } from "react";
+import { useContext, useEffect, useState } from "react";
 import { useParams, useNavigate } from "react-router";
+import { tr, Tr, langCodeContext } from "../translate";
 
 function SingleReview() {
   let params = useParams();
   let navigate = useNavigate();
+  const { langCode } = useContext(langCodeContext)
 
   const [review, setReview] = useState({
     id: "",
@@ -50,7 +52,7 @@ function SingleReview() {
         if (data.error) {
           alert(data.error);
         } else {
-          alert("Review updated!");
+          alert(tr("Review updated", langCode));
           navigate(-1);
         }
       });
@@ -71,7 +73,7 @@ function SingleReview() {
         if (data.error) {
           alert(data.error);
         } else {
-          alert("Review deleted!");
+          alert(tr("Review deleted", langCode));
           navigate(-1);
         }
       });
@@ -83,14 +85,14 @@ function SingleReview() {
 
   return (
     <div className="page">
-      <h3>Edit Review</h3>
+      <h3>{Tr("Edit Review")}</h3>
       <textarea
         value={review.content}
         onChange={(e) => setReview({ ...review, content: e.target.value })}
       ></textarea>
       <div>
-        <button onClick={() => deleteReview()}>Delete</button>
+        <button onClick={() => deleteReview()}>{Tr("Delete")}</button>
-        <button onClick={() => save()}>Save</button>
+        <button onClick={() => save()}>{Tr("Save")}</button>
       </div>
     </div>
   );

web/src/component/EditTag.js

@@ -1,9 +1,11 @@
-import { useState, useEffect } from "react";
+import { useState, useEffect, useContext } from "react";
 import { useParams, useNavigate } from "react-router";
+import { tr, Tr, langCodeContext } from "../translate";
 
 function EditTag() {
   let params = useParams();
   let navigate = useNavigate();
+  const { langCode } = useContext(langCodeContext);
 
   const [tag, setTag] = useState({
     id: "",
@@ -54,7 +56,7 @@ function EditTag() {
         if (data.error) {
           alert(data.error);
         } else {
-          alert("Tag updated successfully");
+          alert(tr("Tag updated successfully", langCode));
           refreshTagInfo();
         }
       });
@@ -79,7 +81,7 @@ function EditTag() {
         if (data.error) {
           alert(data.error);
         } else {
-          alert("Tag deleted successfully");
+          alert(tr("Tag deleted successfully", langCode));
           navigate(-1);
         }
       });
@@ -87,9 +89,9 @@ function EditTag() {
 
   return (
     <div className="page">
-      <h3>Edit Tag</h3>
+      <h3>{Tr("Edit Tag")}</h3>
       <div>
-        <label htmlFor="id">ID</label>
+        <label htmlFor="id">{Tr("ID")}</label>
         <input
           type="text"
           disabled
@@ -98,7 +100,7 @@ function EditTag() {
           value={tag.id}
           onChange={(e) => setTag({ ...tag, id: e.target.value })}
         />
-        <label htmlFor="name">Created By</label>
+        <label htmlFor="name">{Tr("Created by")}</label>
         <input
           type="text"
           disabled
@@ -115,7 +117,7 @@ function EditTag() {
             })
           }
         />
-        <label htmlFor="name">Name</label>
+        <label htmlFor="name">{Tr("Name")}</label>
         <input
           type="text"
           name="name"
@@ -123,15 +125,15 @@ function EditTag() {
           value={tag.name}
           onChange={(e) => setTag({ ...tag, name: e.target.value })}
         />
-        <label htmlFor="description">Description</label>
+        <label htmlFor="description">{Tr("Description")}</label>
         <textarea
           name="description"
           id="description"
           value={tag.description}
           onChange={(e) => setTag({ ...tag, description: e.target.value })}
         />
-        <button onClick={deleteTag}>Delete</button>
+        <button onClick={deleteTag}>{Tr("Delete")}</button>
-        <button onClick={() => updateTagInfo()}>Save</button>
+        <button onClick={() => updateTagInfo()}>{Tr("Save")}</button>
       </div>
     </div>
   );

web/src/component/FeedbackPage.js

@@ -1,6 +1,7 @@
 import { useState, useEffect } from "react";
 import { Link } from "react-router-dom";
 import { convertIntToDateTime } from "./Common";
+import { Tr } from "../translate";
 
 function FeedbackPage() {
   const [content, setContext] = useState("");
@@ -45,17 +46,17 @@ function FeedbackPage() {
 
   return (
     <div className="page">
-      <h3>Feedback</h3>
+      <h3>{Tr("Feedbacks")}</h3>
       <textarea value={content} onChange={(e) => setContext(e.target.value)} />
-      <button onClick={() => submitFeedback()}>Submit</button>
+      <button onClick={() => submitFeedback()}>{Tr("Submit")}</button>
       <div>
         <table>
           <thead>
             <tr>
-              <th>User</th>
+              <th>{Tr("User")}</th>
-              <th>Feedback</th>
+              <th>{Tr("Feedback")}</th>
-              <th>Date</th>
+              <th>{Tr("Date")}</th>
-              <th>Action</th>
+              <th>{Tr("Action")}</th>
             </tr>
           </thead>
           <tbody>
@@ -90,7 +91,7 @@ function FeedbackPage() {
                         });
                     }}
                   >
-                    Delete
+                    {Tr("Delete")}
                   </button>
                 </td>
               </tr>

web/src/component/FileDialog.js

@@ -1,4 +1,5 @@
 import { useNavigate } from "react-router";
+import { Tr } from "../translate";
 
 function FileDialog(props) {
   // props.showStatus
@@ -10,7 +11,12 @@ function FileDialog(props) {
   let navigate = useNavigate();
 
   return (
-    <dialog open={props.showStatus}>
+    <dialog
+      open={props.showStatus}
+      style={{
+        zIndex: 1,
+      }}
+    >
       <p
         style={{
           cursor: "pointer",
@@ -23,9 +29,9 @@ function FileDialog(props) {
         {props.file.filename}
       </p>
       <p>
-        Play: play using browser player.
+        {Tr("Play: play using browser player.")}
         <br />
-        Info for more actions.
+        {Tr("Info for more actions.")}
       </p>
       <button
         onClick={() => {
@@ -33,7 +39,7 @@ function FileDialog(props) {
           props.setShowStatus(false);
         }}
       >
-        Info
+        {Tr("Info")}
       </button>
       <button
         onClick={() => {
@@ -41,9 +47,9 @@ function FileDialog(props) {
           props.setShowStatus(false);
         }}
       >
-        Play
+        {Tr("Play")}
       </button>
-      <button onClick={() => props.setShowStatus(false)}>Close</button>
+      <button onClick={() => props.setShowStatus(false)}>{Tr("Close")}</button>
     </dialog>
   );
 }

web/src/component/FileInfo.js

@@ -1,5 +1,6 @@
 import { useNavigate, useParams } from "react-router";
-import { useEffect, useState } from "react";
+import { useContext, useEffect, useState } from "react";
+import { Tr, tr, langCodeContext } from "../translate";
 
 function FileInfo(props) {
   let navigate = useNavigate();
@@ -14,6 +15,7 @@ function FileInfo(props) {
   const [tags, setTags] = useState([]);
   const [tagsOnFile, setTagsOnFile] = useState([]);
   const [selectedTagID, setSelectedTagID] = useState("");
+  const { langCode } = useContext(langCodeContext);
 
   function refresh() {
     fetch(`/api/v1/get_file_info`, {
@@ -90,7 +92,9 @@ function FileInfo(props) {
 
   function deleteFile() {
     // show Warning
-    if (window.confirm("Are you sure you want to delete this file?")) {
+    if (
+      window.confirm(tr("Are you sure you want to delete this file?", langCode))
+    ) {
       fetch(`/api/v1/delete_file`, {
         method: "POST",
         headers: {
@@ -127,7 +131,7 @@ function FileInfo(props) {
         if (data.error) {
           alert(data.error);
         } else {
-          alert("Filename updated");
+          alert(tr("Filename updated", langCode));
           refresh();
         }
       });
@@ -163,42 +167,42 @@ function FileInfo(props) {
 
   return (
     <div className="page">
-      <h3>File Details</h3>
+      <h3>{Tr("File Details")}</h3>
       <div>
         <a href={downloadURL} download>
-          <button>Download</button>
+          <button>{Tr("Download")}</button>
         </a>
         <button
           onClick={() => {
             props.setPlayingFile(file);
           }}
         >
-          Play
+          {Tr("Play")}
         </button>
         <button
           onClick={() => {
             navigate(`/files/${params.id}/review`);
           }}
         >
-          Review
+          {Tr("Review")}
         </button>
         <button
           onClick={() => {
             navigate(`/files/${params.id}/share`);
           }}
         >
-          Share
+          {Tr("Share")}
         </button>
         <button
           onClick={() => {
             deleteFile();
           }}
         >
-          Delete
+          {Tr("Delete")}
         </button>
       </div>
       <div>
-        <label htmlFor="foldername">Folder Name:</label>
+        <label htmlFor="foldername">{Tr("Folder Name")}</label>
         <input
           type="text"
           id="foldername"
@@ -208,7 +212,7 @@ function FileInfo(props) {
           }}
           readOnly
         />
-        <label htmlFor="filename">File Name:</label>
+        <label htmlFor="filename">{Tr("Filename")}</label>
         <input
           type="text"
           id="filename"
@@ -220,15 +224,15 @@ function FileInfo(props) {
             });
           }}
         />
-        <label htmlFor="filesize">File Size:</label>
+        <label htmlFor="filesize">{Tr("File size")}</label>
         <input type="text" id="filesize" value={file.filesize} readOnly />
       </div>
       <div className="horizontal">
-        <button onClick={updateFilename}>Save</button>
+        <button onClick={updateFilename}>{Tr("Save")}</button>
-        <button onClick={resetFilename}>Reset</button>
+        <button onClick={resetFilename}>{Tr("Reset")}</button>
       </div>
       <div>
-        <label>Tags:</label>
+        <label>{Tr("Tags")}</label>
         <ul>
           {tagsOnFile.map((tag) => {
             return (
@@ -245,7 +249,7 @@ function FileInfo(props) {
                     removeTagOnFile(tag.id);
                   }}
                 >
-                  Remove
+                  {Tr("Remove")}
                 </button>
               </li>
             );
@@ -257,7 +261,7 @@ function FileInfo(props) {
               setSelectedTagID(e.target.value);
             }}
           >
-            <option value="">Select a tag</option>
+            <option value="">{tr("Select a tag", langCode)}</option>
             {tags.map((tag) => {
               return (
                 <option key={tag.id} value={tag.id}>
@@ -270,7 +274,7 @@ function FileInfo(props) {
             onClick={() => {
               // check empty
               if (selectedTagID === "") {
-                alert("Please select a tag");
+                alert(tr("Please select a tag", langCode));
                 return;
               }
               fetch(`/api/v1/put_tag_on_file`, {
@@ -293,7 +297,7 @@ function FileInfo(props) {
                 });
             }}
           >
-            Add Tag
+            {Tr("Add tag")}
           </button>
         </div>
       </div>

web/src/component/FilesInFolder.js

@@ -3,6 +3,7 @@ import { useState, useEffect } from "react";
 import { useNavigate } from "react-router-dom";
 import { useQuery } from "./Common";
 import FilesTable from "./FilesTable";
+import { Tr } from "../translate";
 
 function FilesInFolder(props) {
   let params = useParams();
@@ -107,13 +108,15 @@ function FilesInFolder(props) {
 
   return (
     <div className="page">
-      <h3>Files in Folder</h3>
+      <h3>{Tr("Files in Folder")}</h3>
       <div className="search_toolbar">
-        <button onClick={lastPage}>Last page</button>
+        <button onClick={lastPage}>{Tr("Last page")}</button>
         <button disabled>
-          {isLoading ? "Loading..." : `${offset} - ${offset + files.length}`}
+          {isLoading
+            ? Tr("Loading...")
+            : `${offset} - ${offset + files.length}`}
         </button>
-        <button onClick={nextPage}>Next page</button>
+        <button onClick={nextPage}>{Tr("Next page")}</button>
       </div>
       <FilesTable setPlayingFile={props.setPlayingFile} files={files} />
       <div>
@@ -123,8 +126,8 @@ function FilesInFolder(props) {
           onChange={(e) => setNewFoldername(e.target.value)}
         />
         <div>
-          <button onClick={() => updateFoldername()}>Save</button>
+          <button onClick={() => updateFoldername()}>{Tr("Save")}</button>
-          <button onClick={() => resetFoldername()}>Reset</button>
+          <button onClick={() => resetFoldername()}>{Tr("Reset")}</button>
         </div>
       </div>
     </div>

web/src/component/FilesTable.js

@@ -1,4 +1,5 @@
 import FileEntry from "./FileEntry";
+import { Tr } from "../translate";
 
 function FilesTable(props) {
   if (props.files.length === 0) {
@@ -8,9 +9,9 @@ function FilesTable(props) {
     <table>
       <thead>
         <tr>
-          <th>Filename</th>
+          <th>{Tr("Filename")}</th>
-          <th>Folder Name</th>
+          <th>{Tr("Folder Name")}</th>
-          <th>Size</th>
+          <th>{Tr("Size")}</th>
         </tr>
       </thead>
       <tbody>

web/src/component/FoldersTable.js

@@ -1,4 +1,5 @@
 import { useNavigate } from "react-router";
+import { Tr } from "../translate";
 
 function FoldersTable(props) {
   let navigate = useNavigate();
@@ -9,8 +10,8 @@ function FoldersTable(props) {
     <table>
       <thead>
         <tr>
-          <th>Folder name</th>
+          <th>{Tr("Folder name")}</th>
-          <th>Action</th>
+          <th>{Tr("Action")}</th>
         </tr>
       </thead>
       <tbody>
@@ -23,7 +24,7 @@ function FoldersTable(props) {
               {folder.foldername}
             </td>
             <td onClick={() => navigate(`/folders/${folder.id}`)}>
-              <button>View</button>
+              <button>{Tr("View")}</button>
             </td>
           </tr>
         ))}

web/src/component/GetRandomFiles.js

@@ -1,7 +1,8 @@
-import { useEffect, useState } from "react";
+import { useContext, useEffect, useState } from "react";
 import { useNavigate } from "react-router-dom";
 import { useQuery } from "./Common";
 import FilesTable from "./FilesTable";
+import { Tr, tr, langCodeContext } from "../translate";
 
 function GetRandomFiles(props) {
   const [files, setFiles] = useState([]);
@@ -10,6 +11,7 @@ function GetRandomFiles(props) {
   const navigator = useNavigate();
   const query = useQuery();
   const selectedTag = query.get("t") || "";
+  const { langCode } = useContext(langCodeContext);
 
   function getRandomFiles() {
     setIsLoading(true);
@@ -84,7 +86,7 @@ function GetRandomFiles(props) {
     <div className="page">
       <div className="search_toolbar">
         <button className="refresh" onClick={() => refresh(setFiles)}>
-          {isLoading ? "Loading..." : "Refresh"}
+          {isLoading ? Tr("Loading...") : Tr("Refresh")}
         </button>
         <select
           className="tag_select"
@@ -93,7 +95,7 @@ function GetRandomFiles(props) {
           }}
           value={selectedTag}
         >
-          <option value="">All</option>
+          <option value="">{tr("All", langCode)}</option>
           {tags.map((tag) => (
             <option key={tag.id} value={tag.id}>
               {tag.name}

web/src/component/Login.js

@@ -1,14 +1,16 @@
 import { useNavigate } from "react-router-dom";
-import { useState } from "react";
+import { useContext, useState } from "react";
+import { Tr, tr, langCodeContext } from "../translate";
 
 function Login(props) {
   let navigate = useNavigate();
   let [username, setUsername] = useState("");
   let [password, setPassword] = useState("");
+  const { langCode } = useContext(langCodeContext);
 
   function login() {
     if (!username || !password) {
-      alert("Please enter username and password");
+      alert(tr("Please enter username and password", langCode));
       return;
     }
     fetch("/api/v1/login", {
@@ -34,15 +36,15 @@ function Login(props) {
 
   return (
     <div className="page">
-      <h2>Login</h2>
+      <h2>{Tr("Login")}</h2>
-      <label htmlFor="username">Username</label>
+      <label htmlFor="username">{Tr("Username")}</label>
       <input
         type="text"
         id="username"
         value={username}
         onChange={(e) => setUsername(e.target.value)}
       />
-      <label htmlFor="password">Password</label>
+      <label htmlFor="password">{Tr("Password")}</label>
       <input
         type="password"
         id="password"
@@ -56,13 +58,13 @@ function Login(props) {
         }}
       />
       <span>
-        <button onClick={login}>Login</button>
+        <button onClick={login}>{Tr("Login")}</button>
         <button
           onClick={() => {
             navigate("/manage/register");
           }}
         >
-          Register
+          {Tr("Register")}
         </button>
       </span>
     </div>

web/src/component/Manage.js

@@ -1,13 +1,36 @@
 import { useNavigate } from "react-router";
 import Database from "./Database";
 
+import { Tr, langCodeContext, LANG_OPTIONS } from "../translate";
+import { useContext } from "react";
+
 function Manage(props) {
   let navigate = useNavigate();
+  const { langCode, setLangCode } = useContext(langCodeContext);
 
   return (
     <div className="page">
-      <h2>Manage</h2>
+      <h2>{Tr("Manage")}</h2>
-      <p>Hi, {props.user.username}</p>
+      <p>
+        {Tr("Hi")}, {props.user.username}
+      </p>
+
+      <select
+        value={langCode}
+        onChange={(event) => {
+          setLangCode(event.target.value);
+        }}
+      >
+        {Object.keys(LANG_OPTIONS).map((code) => {
+          const langOption = LANG_OPTIONS[code];
+          return (
+            <option value={code} key={code}>
+              {langOption.name}
+            </option>
+          );
+        })}
+      </select>
+
       {props.user.role === 0 && (
         <div>
           <button
@@ -15,14 +38,14 @@ function Manage(props) {
               navigate("/manage/login");
             }}
           >
-            Login
+            {Tr("Login")}
           </button>
           <button
             onClick={() => {
               navigate("/manage/register");
             }}
           >
-            Register
+            {Tr("Register")}
           </button>
         </div>
       )}
@@ -33,7 +56,7 @@ function Manage(props) {
               navigate(`/manage/users/${props.user.id}`);
             }}
           >
-            Profile
+            {Tr("Profile")}
           </button>
           <button
             onClick={() => {
@@ -48,17 +71,28 @@ function Manage(props) {
                 });
             }}
           >
-            Logout
+            {Tr("Logout")}
           </button>
         </div>
       )}
       <hr />
       <div className="horizontal">
-        <button onClick={() => navigate("/manage/tags")}>Tags</button>
+        <button onClick={() => navigate("/manage/tags")}>{Tr("Tags")}</button>
-        <button onClick={() => navigate("/manage/users")}>Users</button>
+        <button onClick={() => navigate("/manage/users")}>{Tr("Users")}</button>
-        <button onClick={() => navigate("/manage/feedbacks")}>Feedbacks</button>
+        <button onClick={() => navigate("/manage/feedbacks")}>
+          {Tr("Feedbacks")}
+        </button>
       </div>
       <Database />
+      <p>
+        <a
+          href="https://github.com/heimoshuiyu/msw-open-music"
+          target="_blank"
+          rel="noreferrer"
+        >
+          {Tr("View source code on Github")}
+        </a>
+      </p>
     </div>
   );
 }

web/src/component/ManageUser.js

@@ -1,12 +1,13 @@
 import { useState, useEffect } from "react";
 import { Link } from "react-router-dom";
+import { Tr } from "../translate";
 
 function ManageUser() {
   const [users, setUsers] = useState([]);
   const roleDict = {
     0: "Anonymous",
     1: "Admin",
-    2: "Normal User",
+    2: "User",
   };
 
   function getUsers() {
@@ -27,13 +28,13 @@ function ManageUser() {
 
   return (
     <div className="page">
-      <h3>Manage User</h3>
+      <h3>{Tr("Manage User")}</h3>
       <table>
         <thead>
           <tr>
-            <th>Name</th>
+            <th>{Tr("Name")}</th>
-            <th>Role</th>
+            <th>{Tr("Role")}</th>
-            <th>Active</th>
+            <th>{Tr("Active")}</th>
           </tr>
         </thead>
         <tbody>
@@ -42,7 +43,7 @@ function ManageUser() {
               <td>
                 <Link to={`/manage/users/${user.id}`}>@{user.username}</Link>
               </td>
-              <td>{roleDict[user.role]}</td>
+              <td>{Tr(roleDict[user.role])}</td>
               <td>
                 <input
                   type="checkbox"
@@ -57,13 +58,15 @@ function ManageUser() {
                         id: user.id,
                         active: e.target.checked,
                       }),
-                    }).then((res) => res.json()).then((data) => {
+                    })
-                      if (data.error) {
+                      .then((res) => res.json())
-                        alert(data.error);
+                      .then((data) => {
-                      } else {
+                        if (data.error) {
-                        getUsers();
+                          alert(data.error);
-                      }
+                        } else {
-                    });
+                          getUsers();
+                        }
+                      });
                   }}
                 />
               </td>

web/src/component/Register.js

@@ -1,5 +1,6 @@
 import { useNavigate } from "react-router-dom";
-import { useState } from "react";
+import { useContext, useState } from "react";
+import { tr, Tr, langCodeContext } from "../translate";
 
 function Register() {
   let navigate = useNavigate();
@@ -7,12 +8,13 @@ function Register() {
   const [password, setPassword] = useState("");
   const [password2, setPassword2] = useState("");
   const [role, setRole] = useState("");
+  const { langCode } = useContext(langCodeContext);
 
   function register() {
     if (!username || !password || !password2 || !role) {
-      alert("Please fill out all fields");
+      alert(tr("Please fill out all fields", langCode));
     } else if (password !== password2) {
-      alert("Passwords do not match");
+      alert(tr("Password do not match", langCode));
     } else {
       fetch("/api/v1/register", {
         method: "POST",
@@ -38,22 +40,22 @@ function Register() {
 
   return (
     <div className="page">
-      <h2>Register</h2>
+      <h2>{Tr("Register")}</h2>
-      <label htmlFor="username">Username</label>
+      <label htmlFor="username">{Tr("Username")}</label>
       <input
         type="text"
         id="username"
         value={username}
         onChange={(e) => setUsername(e.target.value)}
       />
-      <label htmlFor="password">Password</label>
+      <label htmlFor="password">{Tr("Password")}</label>
       <input
         type="password"
         id="password"
         value={password}
         onChange={(e) => setPassword(e.target.value)}
       />
-      <label htmlFor="password2">Confirm Password</label>
+      <label htmlFor="password2">{Tr("Confirm Password")}</label>
       <input
         type="password"
         id="password2"
@@ -66,13 +68,13 @@ function Register() {
           }
         }}
       />
-      <label htmlFor="role">Role</label>
+      <label htmlFor="role">{Tr("Role")}</label>
       <select value={role} onChange={(e) => setRole(e.target.value)}>
-        <option value="">Select a role</option>
+        <option value="">{tr("Select a role", langCode)}</option>
-        <option value="2">User</option>
+        <option value="2">{tr("User", langCode)}</option>
-        <option value="1">Admin</option>
+        <option value="1">{tr("Admin", langCode)}</option>
       </select>
-      <button onClick={register}>Register</button>
+      <button onClick={register}>{Tr("Register")}</button>
     </div>
   );
 }

web/src/component/ReviewEntry.js

@@ -1,25 +1,28 @@
 import { Link } from "react-router-dom";
 import { convertIntToDateTime } from "./Common";
+import { Tr, tr, langCodeContext } from "../translate";
+import { useContext } from "react";
 
 function ReviewEntry(props) {
+  const { langCode } = useContext(langCodeContext);
   return (
     <div>
       <h4>
         <Link to={`/manage/users/${props.review.user.id}`}>
           @{props.review.user.username}
         </Link>{" "}
-        review{" "}
+        {Tr("review")}{" "}
         <Link to={`/files/${props.review.file.id}`}>
           {props.review.file.filename}
         </Link>{" "}
-        on {convertIntToDateTime(props.review.created_at)}{" "}
+        {Tr("on")} {convertIntToDateTime(props.review.created_at)}{" "}
         {props.review.updated_at !== 0 &&
-          "(modified on " +
+          `(${tr("modified on", langCode)} ${convertIntToDateTime(
-            convertIntToDateTime(props.review.updated_at) +
+            props.review.updated_at
-            ")"}{" "}
+          )} ) `}
         {(props.user.role === 1 || props.review.user.id === props.user.id) &&
           props.user.role !== 0 && (
-            <Link to={`/manage/reviews/${props.review.id}`}>Edit</Link>
+            <Link to={`/manage/reviews/${props.review.id}`}>{Tr("Edit")}</Link>
           )}
       </h4>
       <p>{props.review.content}</p>

web/src/component/ReviewPage.js

@@ -1,6 +1,7 @@
 import { useState, useEffect } from "react";
 import { useParams } from "react-router";
 import ReviewEntry from "./ReviewEntry";
+import { Tr } from "../translate";
 
 function ReviewPage(props) {
   let params = useParams();
@@ -55,7 +56,7 @@ function ReviewPage(props) {
 
   return (
     <div className="page">
-      <h3>Review Page</h3>
+      <h3>{Tr("Review Page")}</h3>
       <div>
         {reviews.map((review) => (
           <ReviewEntry key={review.id} review={review} user={props.user} />
@@ -66,7 +67,7 @@ function ReviewPage(props) {
           value={newReview}
           onChange={(e) => setNewReview(e.target.value)}
         />
-        <button onClick={() => submitReview()}>Submit</button>
+        <button onClick={() => submitReview()}>{Tr("Submit")}</button>
       </div>
     </div>
   );

web/src/component/SearchFiles.js

@@ -1,7 +1,8 @@
-import { useState, useEffect } from "react";
+import { useState, useEffect, useContext } from "react";
 import { useNavigate } from "react-router-dom";
 import { useQuery } from "./Common";
 import FilesTable from "./FilesTable";
+import { Tr, tr, langCodeContext } from "../translate";
 
 function SearchFiles(props) {
   const navigator = useNavigate();
@@ -12,6 +13,7 @@ function SearchFiles(props) {
   const offset = parseInt(query.get("o")) || 0;
   const [isLoading, setIsLoading] = useState(false);
   const limit = 10;
+  const { langCode } = useContext(langCodeContext);
 
   function searchFiles() {
     // check empty filename
@@ -57,7 +59,7 @@ function SearchFiles(props) {
 
   return (
     <div className="page">
-      <h3>Search Files</h3>
+      <h3>{Tr("Search Files")}</h3>
       <div className="search_toolbar">
         <input
           onChange={(event) => setFilenameInput(event.target.value)}
@@ -67,7 +69,7 @@ function SearchFiles(props) {
             }
           }}
           type="text"
-          placeholder="Enter filename"
+          placeholder={tr("Enter filename", langCode)}
           value={filenameInput}
         />
         <button
@@ -75,13 +77,13 @@ function SearchFiles(props) {
             navigator(`/files?q=${filenameInput}&o=0`);
           }}
         >
-          {isLoading ? "Loading..." : "Search"}
+          {isLoading ? Tr("Loading...") : Tr("Search")}
         </button>
-        <button onClick={lastPage}>Last page</button>
+        <button onClick={lastPage}>{Tr("Last page")}</button>
         <button disabled>
           {offset} - {offset + files.length}
         </button>
-        <button onClick={nextPage}>Next page</button>
+        <button onClick={nextPage}>{Tr("Next page")}</button>
       </div>
       <FilesTable setPlayingFile={props.setPlayingFile} files={files} />
     </div>

web/src/component/SearchFolders.js

@@ -1,7 +1,8 @@
-import { useEffect, useState } from "react";
+import { useContext, useEffect, useState } from "react";
 import { useNavigate } from "react-router-dom";
 import { useQuery } from "./Common";
 import FoldersTable from "./FoldersTable";
+import { Tr, tr, langCodeContext } from "../translate";
 
 function SearchFolders() {
   const navigator = useNavigate();
@@ -12,6 +13,7 @@ function SearchFolders() {
   const offset = parseInt(query.get("o")) || 0;
   const [isLoading, setIsLoading] = useState(false);
   const limit = 10;
+  const { langCode } = useContext(langCodeContext);
 
   function searchFolder() {
     if (foldername === "") {
@@ -55,7 +57,7 @@ function SearchFolders() {
 
   return (
     <div className="page">
-      <h3>Search Folders</h3>
+      <h3>{Tr("Search Folders")}</h3>
       <div className="search_toolbar">
         <input
           onChange={(event) => setFoldernameInput(event.target.value)}
@@ -65,7 +67,7 @@ function SearchFolders() {
             }
           }}
           type="text"
-          placeholder="Enter folder name"
+          placeholder={tr("Enter folder name", langCode)}
           value={foldernameInput}
         />
         <button
@@ -73,13 +75,13 @@ function SearchFolders() {
             navigator(`/folders?q=${foldernameInput}&o=0`);
           }}
         >
-          {isLoading ? "Loading..." : "Search"}
+          {isLoading ? Tr("Loading...") : Tr("Search")}
         </button>
-        <button onClick={lastPage}>Last page</button>
+        <button onClick={lastPage}>{Tr("Last page")}</button>
         <button disabled>
           {offset} - {offset + limit}
         </button>
-        <button onClick={nextPage}>Next page</button>
+        <button onClick={nextPage}>{Tr("Next page")}</button>
       </div>
       <FoldersTable folders={folders} />
     </div>

web/src/component/Share.js

@@ -1,10 +1,13 @@
-import { useEffect, useState } from "react";
+import { useContext, useEffect, useState } from "react";
 import { useParams } from "react-router";
 import FilesTable from "./FilesTable";
+import { Tr, tr, langCodeContext } from "../translate";
 
 function Share(props) {
   let params = useParams();
-  const [file, setFile] = useState([]);
+  const { langCode } = useContext(langCodeContext);
+
+  const [file, setFile] = useState({});
   useEffect(() => {
     fetch("/api/v1/get_file_info", {
       method: "POST",
@@ -15,23 +18,39 @@ function Share(props) {
     })
       .then((response) => response.json())
       .then((data) => {
-        setFile([data]);
+        setFile(data);
       })
       .catch((error) => {
         alert("get_file_info error: " + error);
       });
   }, [params]);
+
+  // change title
+  useEffect(() => {
+    const oldTitle = document.title;
+
+    document.title = `${tr("Share", langCode)}🎵: ${
+      file.filename
+    } - MSW Open Music`;
+
+    // set title back
+    return () => {
+      document.title = oldTitle;
+    };
+  }, [file]);
+
   return (
     <div className="page">
-      <h3>Share with others!</h3>
+      <h3>{Tr("Share with others!")}</h3>
       <p>
-        👇 Click the filename below to enjoy music!
+        {Tr("Share link")}:{" "}
+        <a href={window.location.href}>{window.location.href}</a>
+      </p>
+      <p>
+        👇 {Tr("Click the filename below to enjoy music!")}
         <br />
       </p>
-      <p>
+      <FilesTable setPlayingFile={props.setPlayingFile} files={[file]} />
-        Share link: <a href={window.location.href}>{window.location.href}</a>
-      </p>
-      <FilesTable setPlayingFile={props.setPlayingFile} files={file} />
     </div>
   );
 }

web/src/component/Tags.js

@@ -1,5 +1,6 @@
 import { useEffect, useState } from "react";
 import { Link } from "react-router-dom";
+import { Tr } from "../translate";
 
 function Tags() {
   const [tags, setTags] = useState([]);
@@ -25,14 +26,14 @@ function Tags() {
 
   return (
     <div className="page">
-      <h3>Tags</h3>
+      <h3>{Tr("Tags")}</h3>
       <table>
         <thead>
           <tr>
-            <th>Name</th>
+            <th>{Tr("Name")}</th>
-            <th>Description</th>
+            <th>{Tr("Description")}</th>
-            <th>Created By</th>
+            <th>{Tr("Created by")}</th>
-            <th>Actions</th>
+            <th>{Tr("Action")}</th>
           </tr>
         </thead>
         <tbody>
@@ -46,25 +47,25 @@ function Tags() {
                 </Link>
               </td>
               <td>
-                <Link to={`/manage/tags/${tag.id}`}>Edit</Link>
+                <Link to={`/manage/tags/${tag.id}`}>{Tr("Edit")}</Link>
               </td>
             </tr>
           ))}
         </tbody>
       </table>
       {!showAddTag && (
-        <button onClick={() => setShowAddTag(true)}>Add Tag</button>
+        <button onClick={() => setShowAddTag(true)}>{Tr("Add tag")}</button>
       )}
       {showAddTag && (
         <div>
-          <label htmlFor="newTagName">New Tag Name</label>
+          <label htmlFor="newTagName">{Tr("New Tag Name")}</label>
           <input
             type="text"
             id="newTagName"
             value={newTagName}
             onChange={(e) => setNewTagName(e.target.value)}
           />
-          <label htmlFor="newTagDescription">New Tag Description</label>
+          <label htmlFor="newTagDescription">{Tr("New Tag Description")}</label>
           <textarea
             id="newTagDescription"
             value={newTagDescription}
@@ -94,7 +95,7 @@ function Tags() {
                 });
             }}
           >
-            Create Tag
+        {Tr("Create tag")}
           </button>
         </div>
       )}

web/src/component/UserProfile.js

@@ -1,6 +1,7 @@
-import { useState, useEffect } from "react";
+import { useState, useEffect, useContext } from "react";
 import { useParams } from "react-router";
 import ReviewEntry from "./ReviewEntry";
+import { Tr, tr, langCodeContext } from "../translate";
 
 function UserProfile(props) {
   let params = useParams();
@@ -15,6 +16,7 @@ function UserProfile(props) {
     active: false,
     avatar_id: 0,
   });
+  const { langCode } = useContext(langCodeContext);
 
   function getReviews() {
     fetch("/api/v1/get_reviews_by_user", {
@@ -63,7 +65,7 @@ function UserProfile(props) {
 
   return (
     <div className="page">
-      <h3>User Profile</h3>
+      <h3>{Tr("User Profile")}</h3>
       <div className="horizontal">
         <input
           type="text"
@@ -103,26 +105,26 @@ function UserProfile(props) {
           }}
           disabled={props.user.id !== user.id && props.user.role !== 1}
         >
-          Save Username
+          {Tr("Save username")}
         </button>
       </div>
       <div>
         <input
           type="password"
           value={oldPassword}
-          placeholder="Old Password"
+          placeholder={tr("Old password", langCode)}
           onChange={(e) => setOldPassword(e.target.value)}
         />
         <input
           type="password"
           value={newPassword}
-          placeholder="New Password"
+          placeholder={tr("New password", langCode)}
           onChange={(e) => setNewPassword(e.target.value)}
         />
         <input
           type="password"
           value={newPasswordConfirm}
-          placeholder="Confirm New Password"
+          placeholder={tr("Confirm new password", langCode)}
           onChange={(e) => setNewPasswordConfirm(e.target.value)}
         />
         <button
@@ -144,7 +146,7 @@ function UserProfile(props) {
                 if (data.error) {
                   alert(data.error);
                 } else {
-                  alert("Password updated successfully!");
+                  alert(tr("Password updated successfully!", langCode));
                 }
               });
           }}
@@ -154,10 +156,10 @@ function UserProfile(props) {
             newPassword.length === 0
           }
         >
-          Change Password
+          {Tr("Change password")}
         </button>
       </div>
-      <h4>Reviews</h4>
+      <h4>{Tr("Reviews")}</h4>
       {reviews.map((review) => (
         <ReviewEntry key={review.id} review={review} user={props.user} />
       ))}

web/src/translate/index.js

@@ -0,0 +1,44 @@
+import { createContext, renderToString } from "react";
+import MAP_zh_CN from "./zh_CN";
+
+const LANG_OPTIONS = {
+  "en-US": {
+    name: "English",
+    langMap: {},
+    matches: ["en-US", "en"],
+  },
+  "zh-CN": {
+    name: "中文（简体）",
+    langMap: MAP_zh_CN,
+    matches: ["zh-CN", "zh"],
+  },
+};
+
+const langCodeContext = createContext("en-US");
+
+function tr(text, langCode) {
+  const option = LANG_OPTIONS[langCode];
+  if (option === undefined) {
+    return text;
+  }
+  const langMap = LANG_OPTIONS[langCode].langMap;
+
+  const translatedText = langMap[text.toLowerCase()];
+  if (translatedText === undefined) {
+    return text;
+  }
+
+  return translatedText;
+}
+
+function Tr(text) {
+  return (
+    <langCodeContext.Consumer>
+      {({ langCode }) => {
+        return tr(text, langCode);
+      }}
+    </langCodeContext.Consumer>
+  );
+}
+
+export { tr, Tr, LANG_OPTIONS, langCodeContext };

web/src/translate/zh_CN.js

@@ -0,0 +1,107 @@
+const LANG_zh_CN = {
+  "feeling luckly": "随机",
+  files: "文件",
+  folders: "文件夹",
+  manage: "管理",
+  "manage user": "用户管理",
+  active: "激活",
+  "search files": "搜索文件",
+  "search folders": "搜索文件夹",
+  "enter filename": "输入文件名",
+  "enter folder name": "输入文件名",
+  search: "搜索",
+  "last page": "上一页",
+  all: "全部",
+  "loading...": "加载中...",
+  "next page": "下一页",
+  "search polders": "搜索文件夹",
+  "share with others!": "分享给好友！",
+  "click the filename below to enjoy music!": "点击下面的文件名开始享受音乐！",
+  "share link": "分享链接",
+  hi: "您好",
+  profile: "个人信息",
+  "user profile": "用户信息",
+  "save username": "更改用户名",
+  save: "保存",
+  reset: "重置",
+  "old password": "旧密码",
+  "new password": "新密码",
+  "confirm new password": "确认新密码",
+  "change password": "更改密码",
+  reviews: "评论",
+  review: "评论",
+  on: "在",
+  edit: "编辑",
+  "modified on": "修改于",
+  share: "分享",
+  delete: "删除",
+  remove: "移除",
+  "file details": "文件详情",
+  download: "下载",
+  logout: "登出",
+  tags: "标签",
+  "add tag": "添加标签",
+  "select a tag": "选择一个标签",
+  "review page": "评论页面",
+  submit: "提交",
+  users: "用户",
+  feedbacks: "反馈",
+  feedback: "反馈",
+  date: "时间",
+  action: "操作",
+  "new tag name": "新标签名",
+  "new tag description": "新标签描述",
+  "update database": "更新索引",
+  "updating...": "更新中...",
+  refresh: "刷新",
+  filename: "文件名",
+  "folder name": "文件夹名",
+  size: "大小",
+  "player status": "播放状态",
+  play: "播放",
+  stop: "停止",
+  "stop timer": "定时停止",
+  loop: "循环",
+  raw: "无损",
+  prepare: "预转码",
+  "file size": "文件大小",
+  login: "登陆",
+  register: "注册",
+  "play: play using browser player.": "播放: 使用浏览器播放",
+  "info for more actions.": "详细: 查看更多相关信息",
+  info: "详细",
+  close: "关闭",
+  "please enter username and password": "请输入用户名和密码",
+  username: "用户名",
+  password: "密码",
+  "please fill out all fields": "请完整填写所有信息",
+  "password do not match": "两次密码不一致",
+  "password updated successfully!": "密码已成功更新！",
+  role: "身份",
+  user: "用户",
+  admin: "管理员",
+  anonymous: "匿名",
+  "select a role": "选择身份",
+  "walk path": "遍历目录",
+  "pattern wav flac mp3": "拓展名 wav flac mp3",
+  "review updated": "已修改评论",
+  "review deleted": "已删除评论",
+  "edit review": "编辑评论",
+  view: "查看",
+  "tag updated successfully": "标签修改成功",
+  "tag deleted successfully": "标签删除成功",
+  "edit tag": "编辑标签",
+  id: "编号",
+  "created by": "创建者",
+  "create tag": "创建新标签",
+  name: "名称",
+  description: "描述",
+  "are you sure you want to delete this file?": "你确定要删除这个文件吗？",
+  "filename updated": "已修改文件名",
+  "please select a tag": "请选择一个标签",
+  "files in folder": "文件夹内",
+  "preparing...": "转码中...",
+  "view source code on github": "在 Github 上查看源代码",
+};
+
+export default LANG_zh_CN;