add basic lastfm hook

cmd/scanner/main.go

@@ -187,6 +187,7 @@ func main() {
 		&db.Track{},
 		&db.Cover{},
 		&db.User{},
+		&db.Setting{},
 	)
 	// 🤫🤫🤫
 	orm.Exec(`

cmd/server/main.go

@@ -87,10 +87,13 @@ func setAdminRoutes(mux *http.ServeMux) {
 	mux.HandleFunc("/admin/home", withUserWare(cont.ServeHome))
 	mux.HandleFunc("/admin/change_own_password", withUserWare(cont.ServeChangeOwnPassword))
 	mux.HandleFunc("/admin/change_own_password_do", withUserWare(cont.ServeChangeOwnPasswordDo))
+	mux.HandleFunc("/admin/link_lastfm_callback", withUserWare(cont.ServeLinkLastFMCallback))
 	mux.HandleFunc("/admin/change_password", withAdminWare(cont.ServeChangePassword))
 	mux.HandleFunc("/admin/change_password_do", withAdminWare(cont.ServeChangePasswordDo))
 	mux.HandleFunc("/admin/create_user", withAdminWare(cont.ServeCreateUser))
 	mux.HandleFunc("/admin/create_user_do", withAdminWare(cont.ServeCreateUserDo))
+	mux.HandleFunc("/admin/update_lastfm_api_key", withAdminWare(cont.ServeUpdateLastFMAPIKey))
+	mux.HandleFunc("/admin/update_lastfm_api_key_do", withAdminWare(cont.ServeUpdateLastFMAPIKeyDo))
 }
 
 func main() {

db/model.go

@@ -55,3 +55,10 @@ type User struct {
 	Password string
 	IsAdmin  bool
 }
+
+// Setting represents the settings table
+type Setting struct {
+	CrudBase
+	Key   string `gorm:"primary_key;auto_increment:false"`
+	Value string
+}

go.mod

@@ -2,6 +2,7 @@ module github.com/sentriz/gonic
 
 require (
 	cloud.google.com/go v0.37.1 // indirect
+	github.com/davecgh/go-spew v1.1.1
 	github.com/denisenkom/go-mssqldb v0.0.0-20190315220205-a8ed825ac853 // indirect
 	github.com/dhowden/tag v0.0.0-20181104225729-a9f04c2798ca
 	github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5 // indirect

handler/admin.go

@@ -74,6 +74,15 @@ func (c *Controller) ServeChangeOwnPasswordDo(w http.ResponseWriter, r *http.Req
 	http.Redirect(w, r, "/admin/home", 303)
 }
 
+func (c *Controller) ServeLinkLastFMCallback(w http.ResponseWriter, r *http.Request) {
+	token := r.URL.Query().Get("token")
+	if token == "" {
+		http.Error(w, "please provide a token", 400)
+		return
+	}
+	_ = token
+}
+
 func (c *Controller) ServeChangePassword(w http.ResponseWriter, r *http.Request) {
 	username := r.URL.Query().Get("user")
 	if username == "" {
@@ -148,3 +157,36 @@ func (c *Controller) ServeCreateUserDo(w http.ResponseWriter, r *http.Request) {
 	}
 	http.Redirect(w, r, "/admin/home", 303)
 }
+
+func (c *Controller) ServeUpdateLastFMAPIKey(w http.ResponseWriter, r *http.Request) {
+	var data templateData
+	var apiKey db.Setting
+	var secret db.Setting
+	c.DB.Where("key = ?", "lastfm_api_key").First(&apiKey)
+	c.DB.Where("key = ?", "lastfm_secret").First(&secret)
+	data.CurrentLastFMAPIKey = apiKey.Value
+	data.CurrentLastFMAPISecret = secret.Value
+	renderTemplate(w, r, "update_lastfm_api_key", &data)
+}
+
+func (c *Controller) ServeUpdateLastFMAPIKeyDo(w http.ResponseWriter, r *http.Request) {
+	session := r.Context().Value("session").(*sessions.Session)
+	apiKey := r.FormValue("api_key")
+	secret := r.FormValue("secret")
+	err := utilities.ValidateAPIKey(apiKey, secret)
+	if err != nil {
+		session.AddFlash(err.Error())
+		session.Save(r, w)
+		http.Redirect(w, r, r.Header.Get("Referer"), 302)
+		return
+	}
+	c.DB.
+		Where(db.Setting{Key: "lastfm_api_key"}).
+		Assign(db.Setting{Value: apiKey}).
+		FirstOrCreate(&db.Setting{})
+	c.DB.
+		Where(db.Setting{Key: "lastfm_secret"}).
+		Assign(db.Setting{Value: secret}).
+		FirstOrCreate(&db.Setting{})
+	http.Redirect(w, r, "/admin/home", 303)
+}

handler/handler.go

@@ -47,6 +47,11 @@ func init() {
 		filepath.Join("templates", "user.tmpl"),
 		filepath.Join("templates", "pages", "create_user.tmpl"),
 	))
+	templates["update_lastfm_api_key"] = template.Must(template.ParseFiles(
+		filepath.Join("templates", "layout.tmpl"),
+		filepath.Join("templates", "user.tmpl"),
+		filepath.Join("templates", "pages", "update_lastfm_api_key.tmpl"),
+	))
 }
 
 type Controller struct {
@@ -55,13 +60,16 @@ type Controller struct {
 }
 
 type templateData struct {
-	Flashes      []interface{}
+	Flashes                []interface{}
-	User         *db.User
+	User                   *db.User
-	SelectedUser *db.User
+	SelectedUser           *db.User
-	AllUsers     []*db.User
+	AllUsers               []*db.User
-	ArtistCount  uint
+	ArtistCount            uint
-	AlbumCount   uint
+	AlbumCount             uint
-	TrackCount   uint
+	TrackCount             uint
+	CurrentLastFMAPIKey    string
+	CurrentLastFMAPISecret string
+	RequestRoot            string
 }
 
 func getStrParam(r *http.Request, key string) string {
@@ -146,6 +154,11 @@ func renderTemplate(w http.ResponseWriter, r *http.Request,
 	if ok {
 		data.User = user
 	}
+	if r.URL.Host == "" {
+		data.RequestRoot = "http://localhost"
+	} else {
+		data.RequestRoot = fmt.Sprintf("%s://%s", r.URL.Scheme, r.URL.Host)
+	}
 	err := templates[name].ExecuteTemplate(w, "layout", data)
 	if err != nil {
 		http.Error(w, fmt.Sprintf("500 when executing: %v", err), 500)

handler/utilities/utilities.go

@@ -18,3 +18,10 @@ func ValidatePasswords(pOne, pTwo string) error {
 	}
 	return nil
 }
+
+func ValidateAPIKey(apiKey, secret string) error {
+	if apiKey == "" || secret == "" {
+		return fmt.Errorf("please enter both the api key and secret")
+	}
+	return nil
+}

lastfm/lastfm.go

@@ -0,0 +1,55 @@
+package lastfm
+
+import (
+	"crypto/md5"
+	"encoding/hex"
+	"encoding/xml"
+	"fmt"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+var (
+	baseURL = "http://ws.audioscrobbler.com/2.0/"
+	client  = &http.Client{
+		Timeout: 10 * time.Second,
+	}
+)
+
+func getParamSignature(params url.Values, secret string) string {
+	toHash := ""
+	for k, v := range params {
+		toHash += k
+		toHash += v[0]
+	}
+	toHash += secret
+	hash := md5.Sum([]byte(toHash))
+	return hex.EncodeToString(hash[:])
+}
+
+func GetSession(apiKey, secret, token string) (error, string) {
+	params := url.Values{}
+	// the first 3 parameters here must be in alphabetical order
+	params.Add("api_key", apiKey)
+	params.Add("method", "auth.getSession")
+	params.Add("token", token)
+	params.Add("api_sig", getParamSignature(params, secret))
+	req, _ := http.NewRequest("GET", baseURL, nil)
+	req.URL.RawQuery = params.Encode()
+	resp, err := client.Do(req)
+	if err != nil {
+		return fmt.Errorf("error when making request to last.fm: %v", err), ""
+	}
+	defer resp.Body.Close()
+	decoder := xml.NewDecoder(resp.Body)
+	var lastfm LastFM
+	err = decoder.Decode(&lastfm)
+	if err != nil {
+		return fmt.Errorf("error when decoding last.fm response: %v", err), ""
+	}
+	if lastfm.Error != nil {
+		return fmt.Errorf("error when parsing last.fm response: %v", lastfm.Error.Value), ""
+	}
+	return nil, lastfm.Session.Key
+}

lastfm/models.go

@@ -0,0 +1,21 @@
+package lastfm
+
+import "encoding/xml"
+
+type LastFM struct {
+	XMLName xml.Name `xml:"lfm"`
+	Status  string   `xml:"status,attr"`
+	Session *Session `xml:"session"`
+	Error   *Error   `xml:"error"`
+}
+
+type Session struct {
+	Name       string `xml:"name"`
+	Key        string `xml:"key"`
+	Subscriber uint   `xml:"subscriber"`
+}
+
+type Error struct {
+	Code  uint   `xml:"code,attr"`
+	Value string `xml:",chardata"`
+}

static/stylesheets/main.css

@@ -8,6 +8,9 @@ form {
     max-width: 400px;
     margin-left: auto;
     margin-right: 0;
+    display: flex;
+    flex-direction: column;
+    align-items: flex-end;
 }
 
 /* reset from awsm */
@@ -30,6 +33,10 @@ form input[type=password], form input[type=text] {
   margin-bottom: 0.25rem;
 }
 
+form input[type=submit] {
+    width: 8rem;
+}
+
 #content > * {
     margin: 2rem 0;
 }
@@ -81,12 +88,3 @@ form input[type=password], form input[type=text] {
     background-color: #fd1b1b1c;
 }
 
-#login-form {
-    display: flex;
-    flex-direction: column;
-    align-items: flex-end;
-}
-
-#login-form input[type=submit] {
-    width: 8rem;
-}

templates/pages/change_own_password.tmpl

@@ -3,9 +3,9 @@
 {{ define "user" }}
 <div class="padded box mono">
     <div class="box-title">
-        <span><u>changing account password</u></span>
+        <u>changing account password</u>
     </div>
-    <form id="login-form" action="/admin/change_own_password_do" method="post">
+    <form action="/admin/change_own_password_do" method="post">
         <input type="password" id="password_one" name="password_one" placeholder="new password">
         <input type="password" id="password_two" name="password_two" placeholder="verify new password">
         <input type="submit" value="change">

templates/pages/change_password.tmpl

@@ -3,9 +3,9 @@
 {{ define "user" }}
 <div class="padded box mono">
     <div class="box-title">
-        <span><u>changing {{ .SelectedUser.Name }}'s password</u></span>
+        <u>changing {{ .SelectedUser.Name }}'s password</u>
     </div>
-    <form id="login-form" action="/admin/change_password_do?user={{ .SelectedUser.Name }}" method="post">
+    <form action="/admin/change_password_do?user={{ .SelectedUser.Name }}" method="post">
         <input type="password" id="password_one" name="password_one" placeholder="new password">
         <input type="password" id="password_two" name="password_two" placeholder="verify new password">
         <input type="submit" value="change">

templates/pages/create_user.tmpl

@@ -3,9 +3,9 @@
 {{ define "user" }}
 <div class="padded box mono">
     <div class="box-title">
-        <span><u>create new user</u></span>
+        <u>create new user</u>
     </div>
-    <form id="login-form" action="/admin/create_user_do" method="post">
+    <form action="/admin/create_user_do" method="post">
         <input type="text" id="username" name="username" placeholder="username">
         <input type="password" id="password_one" name="password_one" placeholder="password">
         <input type="password" id="password_two" name="password_two" placeholder="verify password">

templates/pages/home.tmpl

@@ -3,7 +3,7 @@
 {{ define "user" }}
 <div class="padded box mono">
     <div class="box-title">
-        <span><u>stats</u></span>
+        <u>stats</u>
     </div>
     <div class="right">
         <span class="pre">artists: {{ printf "%7v" .ArtistCount }}</span><br/>
@@ -13,32 +13,32 @@
 </div>
 <div class="padded box mono">
     <div class="box-title">
-        <span><u>last fm</u></span>
+        <u>last.fm</u>
     </div>
     <div class="right">
-        <span class="pre">unlinked</span><br/>
+        <a href="/admin/update_lastfm_api_key">update last.fm api key</a><br/>
+        <a href="https://www.last.fm/api/auth/?api_key={{ .CurrentLastFMAPIKey }}&cb={{ .RequestRoot }}/admin/link_lastfm_callback">link account</a><br/>
     </div>
 </div>
 <div class="padded box mono">
     {{ if .User.IsAdmin }}
     {{/* admin panel to manage all users */}}
     <div class="box-title">
-        <span><u>users</u></span>
+        <u>users</u>
     </div>
     <div class="right">
     {{ range $user := .AllUsers }}
-        <span class="pre">{{ $user.Name }} <span class="light">created</span> <u>{{ $user.CreatedAt.Format "Jan 02, 2006" }}</u> <a href="/admin/change_password?user={{ $user.Name }}">change password</a></span><br/>
+        {{ $user.Name }} <span class="light">created</span> <u>{{ $user.CreatedAt.Format "Jan 02, 2006" }}</u> <a href="/admin/change_password?user={{ $user.Name }}">change password</a><br/>
     {{ end }}
-    <br>  
     <a href="/admin/create_user" class="button">create new</a>
     </div>
     {{ else }}
     {{/* user panel to manage themselves */}}
     <div class="box-title">
-        <span><u>your account</u></span>
+        <u>your account</u>
     </div>
     <div class="right">
-    <a href="/admin/change_own_password" class="button">change password</a>
+        <a href="/admin/change_own_password" class="button">change password</a>
     </div>
     {{ end }}
 </div>

templates/pages/login.tmpl

@@ -3,9 +3,9 @@
 {{ define "content" }}
 <div class="padded box mono">
     <div class="box-title">
-        <span><u>please login</u></span>
+        <u>please login</u>
     </div>
-    <form id="login-form" action="/admin/login_do" method="post">
+    <form action="/admin/login_do" method="post">
         <input type="text" id="username" name="username" placeholder="username">
         <input type="password" id="password" name="password" placeholder="password">
         <input type="submit" value="login">

templates/pages/update_lastfm_api_key.tmpl

@@ -0,0 +1,18 @@
+{{ define "title" }}home{{ end }}
+
+{{ define "user" }}
+<div class="padded box mono">
+    <div class="box-title">
+        <u>updating last.fm api key</u>
+    </div>
+    <div class="right">
+        <span class="light">current key</span> <i>{{ if .CurrentLastFMAPIKey }}{{ .CurrentLastFMAPIKey }}{{ else }}not set{{ end }}</i><br/>
+        <span class="light">current secret</span> <i>{{ if .CurrentLastFMAPISecret }}{{ .CurrentLastFMAPISecret }}{{ else }}not set{{ end }}</i>
+    </div>
+    <form action="/admin/update_lastfm_api_key_do" method="post">
+        <input type="text" id="api_key" name="api_key" placeholder="new key">
+        <input type="text" id="secret" name="secret" placeholder="new secret">
+        <input type="submit" value="update">
+    </form>
+</div>
+{{ end }}

templates/user.tmpl

@@ -2,7 +2,7 @@
 
 {{ define "content" }}
 <div class="light right">
-    <span>welcome <u>{{ .User.Name }}</u> &#124; <a href="/admin/home">home</a> &#124; <a href="/admin/logout">logout</a></span>
+    welcome <u>{{ .User.Name }}</u> &#124; <a href="/admin/home">home</a> &#124; <a href="/admin/logout">logout</a>
 </div>
 {{ template "user" . }}
 {{ end }}