Adding support for PostgreSQL as database

This adds support for a second database backend: PostgreSQL (in addition to sqlite3). This allows externailzing the database used by gonic.

cmd/gonic/gonic.go

@@ -15,6 +15,7 @@ import (
 	"time"
 
 	"github.com/google/shlex"
+	_ "github.com/jinzhu/gorm/dialects/postgres"
 	_ "github.com/jinzhu/gorm/dialects/sqlite"
 	"github.com/oklog/run"
 	"github.com/peterbourgon/ff"
@@ -38,7 +39,12 @@ func main() {
 	confTLSKey := set.String("tls-key", "", "path to TLS private key (optional)")
 	confPodcastPath := set.String("podcast-path", "", "path to podcasts")
 	confCachePath := set.String("cache-path", "", "path to cache")
-	confDBPath := set.String("db-path", "gonic.db", "path to database (optional)")
+	confSqlitePath := set.String("db-path", "gonic.db", "path to database (optional, default: gonic.db)")
+	confPostgresHost := set.String("postgres-host", "", "name of the PostgreSQL gonicServer (optional)")
+	confPostgresPort := set.Int("postgres-port", 5432, "port to use for PostgreSQL connection (optional, default: 5432)")
+	confPostgresName := set.String("postgres-db", "gonic", "name of the PostgreSQL database (optional, default: gonic)")
+	confPostgresUser := set.String("postgres-user", "gonic", "name of the PostgreSQL user (optional, default: gonic)")
+	confPostgresSslModel := set.String("postgres-ssl-mode", "verify-full", "the ssl mode used for connecting to the PostreSQL instance (optional, default: verify-full)")
 	confScanIntervalMins := set.Int("scan-interval", 0, "interval (in minutes) to automatically scan music (optional)")
 	confScanAtStart := set.Bool("scan-at-start-enabled", false, "whether to perform an initial scan at startup (optional)")
 	confScanWatcher := set.Bool("scan-watcher-enabled", false, "whether to watch file system for new music and rescan (optional)")
@@ -104,7 +110,13 @@ func main() {
 		}
 	}
 
-	dbc, err := db.New(*confDBPath, db.DefaultOptions())
+	var dbc *db.DB
+	var err error
+	if len(*confPostgresHost) > 0 {
+		dbc, err = db.NewPostgres(*confPostgresHost, *confPostgresPort, *confPostgresName, *confPostgresUser, os.Getenv("GONIC_POSTGRES_PW"), *confPostgresSslModel)
+	} else {
+		dbc, err = db.NewSqlite3(*confSqlitePath, db.DefaultOptions())
+	}
 	if err != nil {
 		log.Fatalf("error opening database: %v\n", err)
 	}

db/db.go

@@ -34,7 +34,7 @@ type DB struct {
 	*gorm.DB
 }
 
-func New(path string, options url.Values) (*DB, error) {
+func NewSqlite3(path string, options url.Values) (*DB, error) {
 	// https://github.com/mattn/go-sqlite3#connection-string
 	url := url.URL{
 		Scheme: "file",
@@ -45,13 +45,26 @@ func New(path string, options url.Values) (*DB, error) {
 	if err != nil {
 		return nil, fmt.Errorf("with gorm: %w", err)
 	}
+	return newDB(db)
+}
+
+func NewPostgres(host string, port int, databaseName string, username string, password string, sslmode string) (*DB, error) {
+	pathAndArgs := fmt.Sprintf("host=%s port=%d user=%s dbname=%s password=%s sslmode=%s", host, port, username, databaseName, password, sslmode)
+	db, err := gorm.Open("postgres", pathAndArgs)
+	if err != nil {
+		return nil, fmt.Errorf("with gorm: %w", err)
+	}
+	return newDB(db)
+}
+
+func newDB(db *gorm.DB) (*DB, error) {
 	db.SetLogger(log.New(os.Stdout, "gorm ", 0))
 	db.DB().SetMaxOpenConns(1)
 	return &DB{DB: db}, nil
 }
 
 func NewMock() (*DB, error) {
-	return New(":memory:", mockOptions())
+	return NewSqlite3(":memory:", mockOptions())
 }
 
 func (db *DB) GetSetting(key string) (string, error) {
@@ -80,10 +93,11 @@ func (db *DB) InsertBulkLeftMany(table string, head []string, left int, col []in
 		rows = append(rows, "(?, ?)")
 		values = append(values, left, c)
 	}
-	q := fmt.Sprintf("INSERT OR IGNORE INTO %q (%s) VALUES %s",
+	q := fmt.Sprintf("INSERT INTO %q (%s) VALUES %s ON CONFLICT (%s) DO NOTHING",
 		table,
 		strings.Join(head, ", "),
 		strings.Join(rows, ", "),
+		strings.Join(head, ", "),
 	)
 	return db.Exec(q, values...).Error
 }

db/migrations.go

@@ -74,14 +74,14 @@ func construct(ctx MigrationContext, id string, f func(*gorm.DB, MigrationContex
 func migrateInitSchema(tx *gorm.DB, _ MigrationContext) error {
 	return tx.AutoMigrate(
 		Genre{},
+		Artist{},
+		Album{},
+		Track{},
 		TrackGenre{},
 		AlbumGenre{},
-		Track{},
-		Artist{},
 		User{},
 		Setting{},
 		Play{},
-		Album{},
 		Playlist{},
 		PlayQueue{},
 	).
@@ -145,12 +145,18 @@ func migrateAddGenre(tx *gorm.DB, _ MigrationContext) error {
 
 func migrateUpdateTranscodePrefIDX(tx *gorm.DB, _ MigrationContext) error {
 	var hasIDX int
-	tx.
-		Select("1").
-		Table("sqlite_master").
-		Where("type = ?", "index").
-		Where("name = ?", "idx_user_id_client").
-		Count(&hasIDX)
+	if tx.Dialect().GetName() == "sqlite3" {
+		tx.Select("1").
+			Table("sqlite_master").
+			Where("type = ?", "index").
+			Where("name = ?", "idx_user_id_client").
+			Count(&hasIDX)
+	} else if tx.Dialect().GetName() == "postgres" {
+		tx.Select("1").
+			Table("pg_indexes").
+			Where("indexname = ?", "idx_user_id_client").
+			Count(&hasIDX)
+	}
 	if hasIDX == 1 {
 		// index already exists
 		return nil
@@ -420,9 +426,15 @@ func migratePlaylistsQueuesToFullID(tx *gorm.DB, _ MigrationContext) error {
 	if err := step.Error; err != nil {
 		return fmt.Errorf("step migrate play_queues to full id: %w", err)
 	}
-	step = tx.Exec(`
+	if tx.Dialect().GetName() == "postgres" {
+		step = tx.Exec(`
+		UPDATE play_queues SET newcurrent=('tr-' || current)::varchar[200];
+	`)
+	} else {
+		step = tx.Exec(`
 		UPDATE play_queues SET newcurrent=('tr-' || CAST(current AS varchar(10)));
 	`)
+	}
 	if err := step.Error; err != nil {
 		return fmt.Errorf("step migrate play_queues to full id: %w", err)
 	}

mockfs/mockfs.go

@@ -289,7 +289,7 @@ func (m *MockFS) DumpDB(suffix ...string) {
 	p = append(p, suffix...)
 
 	destPath := filepath.Join(os.TempDir(), strings.Join(p, "-"))
-	dest, err := db.New(destPath, url.Values{})
+	dest, err := db.NewSqlite3(destPath, url.Values{})
 	if err != nil {
 		m.t.Fatalf("create dest db: %v", err)
 	}

scanner/scanner_test.go

@@ -397,7 +397,7 @@ func TestMultiFolderWithSharedArtist(t *testing.T) {
 
 	sq := func(db *gorm.DB) *gorm.DB {
 		return db.
-			Select("*, count(sub.id) child_count, sum(sub.length) duration").
+			Select("albums.*, count(sub.id) child_count, sum(sub.length) duration").
 			Joins("LEFT JOIN tracks sub ON albums.id=sub.album_id").
 			Group("albums.id")
 	}

server/ctrlsubsonic/handlers_by_folder.go

@@ -31,13 +31,13 @@ func (c *Controller) ServeGetIndexes(r *http.Request) *spec.Response {
 	}
 	var folders []*db.Album
 	c.DB.
-		Select("*, count(sub.id) child_count").
+		Select("albums.*, count(sub.id) child_count").
 		Preload("AlbumStar", "user_id=?", user.ID).
 		Preload("AlbumRating", "user_id=?", user.ID).
 		Joins("LEFT JOIN albums sub ON albums.id=sub.parent_id").
 		Where("albums.parent_id IN ?", rootQ.SubQuery()).
 		Group("albums.id").
-		Order("albums.right_path COLLATE NOCASE").
+		Order("albums.right_path").
 		Find(&folders)
 	// [a-z#] -> 27
 	indexMap := make(map[string]*spec.Index, 27)
@@ -80,7 +80,7 @@ func (c *Controller) ServeGetMusicDirectory(r *http.Request) *spec.Response {
 		Where("parent_id=?", id.Value).
 		Preload("AlbumStar", "user_id=?", user.ID).
 		Preload("AlbumRating", "user_id=?", user.ID).
-		Order("albums.right_path COLLATE NOCASE").
+		Order("albums.right_path").
 		Find(&childFolders)
 	for _, ch := range childFolders {
 		childrenObj = append(childrenObj, spec.NewTCAlbumByFolder(ch))

server/ctrlsubsonic/handlers_by_tags.go

@@ -24,12 +24,12 @@ func (c *Controller) ServeGetArtists(r *http.Request) *spec.Response {
 	user := r.Context().Value(CtxUser).(*db.User)
 	var artists []*db.Artist
 	q := c.DB.
-		Select("*, count(sub.id) album_count").
+		Select("artists.*, count(sub.id) album_count").
 		Joins("LEFT JOIN albums sub ON artists.id=sub.tag_artist_id").
 		Preload("ArtistStar", "user_id=?", user.ID).
 		Preload("ArtistRating", "user_id=?", user.ID).
 		Group("artists.id").
-		Order("artists.name COLLATE NOCASE")
+		Order("artists.name")
 	if m := getMusicFolder(c.MusicPaths, params); m != "" {
 		q = q.Where("sub.root_dir=?", m)
 	}
@@ -68,7 +68,7 @@ func (c *Controller) ServeGetArtist(r *http.Request) *spec.Response {
 	c.DB.
 		Preload("Albums", func(db *gorm.DB) *gorm.DB {
 			return db.
-				Select("*, count(sub.id) child_count, sum(sub.length) duration").
+				Select("albums.*, count(sub.id) child_count, sum(sub.length) duration").
 				Joins("LEFT JOIN tracks sub ON albums.id=sub.album_id").
 				Preload("AlbumStar", "user_id=?", user.ID).
 				Preload("AlbumRating", "user_id=?", user.ID).
@@ -99,6 +99,7 @@ func (c *Controller) ServeGetAlbum(r *http.Request) *spec.Response {
 	err = c.DB.
 		Select("albums.*, count(tracks.id) child_count, sum(tracks.length) duration").
 		Joins("LEFT JOIN tracks ON tracks.album_id=albums.id").
+		Group("albums.id").
 		Preload("TagArtist").
 		Preload("Genres").
 		Preload("Tracks", func(db *gorm.DB) *gorm.DB {
@@ -163,14 +164,14 @@ func (c *Controller) ServeGetAlbumListTwo(r *http.Request) *spec.Response {
 	case "frequent":
 		user := r.Context().Value(CtxUser).(*db.User)
 		q = q.Joins("JOIN plays ON albums.id=plays.album_id AND plays.user_id=?", user.ID)
-		q = q.Order("plays.count DESC")
+		q = q.Order("SUM(plays.count) DESC")
 	case "newest":
 		q = q.Order("created_at DESC")
 	case "random":
 		q = q.Order(gorm.Expr("random()"))
 	case "recent":
 		q = q.Joins("JOIN plays ON albums.id=plays.album_id AND plays.user_id=?", user.ID)
-		q = q.Order("plays.time DESC")
+		q = q.Order("MAX(plays.time) DESC")
 	case "starred":
 		q = q.Joins("JOIN album_stars ON albums.id=album_stars.album_id AND album_stars.user_id=?", user.ID)
 		q = q.Order("tag_title")
@@ -218,7 +219,7 @@ func (c *Controller) ServeSearchThree(r *http.Request) *spec.Response {
 	// search artists
 	var artists []*db.Artist
 	q := c.DB.
-		Select("*, count(albums.id) album_count").
+		Select("artists.*, count(albums.id) album_count").
 		Group("artists.id").
 		Where("name LIKE ? OR name_u_dec LIKE ?", query, query).
 		Joins("JOIN albums ON albums.tag_artist_id=artists.id").

server/ctrlsubsonic/handlers_raw.go

@@ -30,7 +30,7 @@ func streamGetTransPref(dbc *db.DB, userID int, client string) (*db.TranscodePre
 	var pref db.TranscodePreference
 	err := dbc.
 		Where("user_id=?", userID).
-		Where("client COLLATE NOCASE IN (?)", []string{"*", client}).
+		Where("client IN (?)", []string{"*", client}).
 		Order("client DESC"). // ensure "*" is last if it's there
 		First(&pref).
 		Error

server/server.go

@@ -1,6 +1,7 @@
 package server
 
 import (
+	"encoding/base64"
 	"fmt"
 	"log"
 	"net/http"
@@ -67,17 +68,19 @@ func New(opts Options) (*Server, error) {
 	r.Use(base.WithCORS)
 	r.Use(handlers.RecoveryHandler(handlers.PrintRecoveryStack(true)))
 
-	sessKey, err := opts.DB.GetSetting("session_key")
+	encSessKey, err := opts.DB.GetSetting("session_key")
 	if err != nil {
 		return nil, fmt.Errorf("get session key: %w", err)
 	}
-	if sessKey == "" {
-		if err := opts.DB.SetSetting("session_key", string(securecookie.GenerateRandomKey(32))); err != nil {
+	sessKey, err := base64.StdEncoding.DecodeString(encSessKey)
+	if err != nil || len(sessKey) == 0 {
+		sessKey = securecookie.GenerateRandomKey(32)
+		if err := opts.DB.SetSetting("session_key", base64.StdEncoding.EncodeToString(sessKey)); err != nil {
 			return nil, fmt.Errorf("set session key: %w", err)
 		}
 	}
 
-	sessDB := gormstore.New(opts.DB.DB, []byte(sessKey))
+	sessDB := gormstore.New(opts.DB.DB, sessKey)
 	sessDB.SessionOpts.HttpOnly = true
 	sessDB.SessionOpts.SameSite = http.SameSiteLaxMode