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album.go
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album.go
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package database
import "database/sql"
type Album struct {
ID int `json:"id,omitempty"`
Name string `json:"name"`
Artist string `json:"artist,omitempty"`
Picture int `json:"picture"`
Year int `json:"year,omitempty"`
Songs []albumSong `json:"songs,omitempty"`
}
type albumSong struct {
ID int `json:"id"`
Title string `json:"title"`
Track int `json:"track"`
Disc int `json:"disc"`
}
func GetAlbums(page int) ([]Album, error) {
q := `
SELECT albums.id, albums.name, artists.name, albums.picture
FROM albums
LEFT JOIN artists
ON artists.id = albums.artist
ORDER BY artists.name
LIMIT 20
OFFSET ?
`
r, err := DB.Query(q, (page-1)*20)
if err != nil {
return nil, err
}
var albums []Album
for r.Next() {
var a Album
r.Scan(&a.ID, &a.Name, &a.Artist, &a.Picture)
albums = append(albums, a)
}
return albums, nil
}
func GetAlbum(id int) (Album, error) {
q := `
SELECT albums.name, artists.name, albums.picture, albums.year
FROM albums
LEFT JOIN artists
ON artists.id = albums.artist
WHERE albums.id = ?
`
var a Album
stmt, err := DB.Prepare(q)
if err != nil {
return a, err
}
r := stmt.QueryRow(id)
r.Scan(&a.Name, &a.Artist, &a.Picture, &a.Year)
q = `
SELECT id, title, track, disc
FROM songs
WHERE album = ?
ORDER BY disc, track
`
stmt, err = DB.Prepare(q)
if err != nil {
return a, err
}
rows, err := stmt.Query(id)
if err != nil {
return a, err
}
for rows.Next() {
var s albumSong
rows.Scan(&s.ID, &s.Title, &s.Track, &s.Disc)
a.Songs = append(a.Songs, s)
}
return a, nil
}
func CreateAlbum(tx *sql.Tx, name string, artist string, picture string, year int) error {
q := `
INSERT INTO albums (name, artist, picture, year)
VALUES (?, (SELECT id FROM artists WHERE name = ?), (SELECT id FROM pictures WHERE path = ?), ?)
ON CONFLICT (name, artist) DO NOTHING
`
stmt, err := tx.Prepare(q)
if err != nil {
return err
}
_, err = stmt.Exec(name, artist, picture, year)
if err != nil {
return err
}
return nil
}