Add: get reviews and fix bug

pkg/database/method_review.go

@@ -8,3 +8,35 @@ func (database *Database) InsertReview(review *Review) error {
 		review.Content)
 	return err
 }
+
+func (database *Database) GetReviewsOnFile(fileId int64) ([]*Review, error) {
+	rows, err := database.stmt.getReviewsOnFile.Query(fileId)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	reviews := make([]*Review, 0)
+	for rows.Next() {
+		review := &Review{
+			User: &User{},
+			File: &File{},
+		}
+		err := rows.Scan(
+			&review.ID,
+			&review.CreatedAt,
+			&review.UpdatedAt,
+			&review.Content,
+			&review.User.ID,
+			&review.User.Username,
+			&review.User.Role,
+			&review.User.AvatarId,
+			&review.File.ID,
+			&review.File.Filename)
+		if err != nil {
+			return nil, err
+		}
+		reviews = append(reviews, review)
+	}
+	return reviews, nil
+}

pkg/database/sql_stmt.go

@@ -207,6 +207,17 @@ var updateFoldernameQuery = `UPDATE folders SET foldername = ? WHERE id = ?;`
 var insertReviewQuery = `INSERT INTO reviews (user_id, file_id, created_at, content)
 VALUES (?, ?, ?, ?);`
 
+var getReviewsOnFileQuery = `SELECT
+reviews.id, reviews.created_at, reviews.updated_at, reviews.content,
+users.id, users.username, users.role, users.avatar_id,
+files.id, files.filename
+FROM reviews
+JOIN users ON reviews.user_id = users.id
+JOIN files ON reviews.file_id = files.id
+WHERE reviews.file_id = ?
+ORDER BY reviews.created_at
+;`
+
 type Stmt struct {
 	initFilesTable     *sql.Stmt
 	initFoldersTable   *sql.Stmt
@@ -248,6 +259,7 @@ type Stmt struct {
 	deleteTagOnFile    *sql.Stmt
 	updateFoldername   *sql.Stmt
 	insertReview       *sql.Stmt
+	getReviewsOnFile   *sql.Stmt
 }
 
 func NewPreparedStatement(sqlConn *sql.DB) (*Stmt, error) {
@@ -558,5 +570,11 @@ func NewPreparedStatement(sqlConn *sql.DB) (*Stmt, error) {
 		return nil, err
 	}
 
+	// init getReviewsOnFile
+	stmt.getReviewsOnFile, err = sqlConn.Prepare(getReviewsOnFileQuery)
+	if err != nil {
+		return nil, err
+	}
+
 	return stmt, err
 }