Foundation: config, schema/migrations, auth, stable IDs, metadata probing

internal/database/settings.go

@@ -0,0 +1,95 @@
+package database
+
+import (
+	"database/sql"
+	"errors"
+)
+
+// GetSetting reads a key from the settings table, returning def if unset.
+func GetSetting(db *sql.DB, key, def string) string {
+	var v string
+	err := db.QueryRow(`SELECT value FROM settings WHERE key = ?`, key).Scan(&v)
+	if err != nil {
+		return def
+	}
+	return v
+}
+
+func SetSetting(db *sql.DB, key, value string) error {
+	_, err := db.Exec(`INSERT INTO settings (key, value, updated_at) VALUES (?, ?, strftime('%Y-%m-%dT%H:%M:%fZ','now'))
+		ON CONFLICT (key) DO UPDATE SET value=excluded.value, updated_at=excluded.updated_at`, key, value)
+	return err
+}
+
+// --- Scan state ---
+
+type ScanState struct {
+	ID                 string
+	MusicFolderID      string
+	Status             string
+	StartedAt          sql.NullString
+	FinishedAt         sql.NullString
+	FilesSeen          int
+	FilesTotalEstimate int
+	FilesAdded         int
+	FilesUpdated       int
+	FilesRemoved       int
+	ErrorMessage       string
+	LastFullScanAt     sql.NullString
+}
+
+const scanStateSelect = `SELECT id, music_folder_id, status, started_at, finished_at, files_seen, files_total_estimate, files_added, files_updated, files_removed, error_message, last_full_scan_at FROM scan_state`
+
+func GetScanState(db *sql.DB, folderID string) (*ScanState, error) {
+	var s ScanState
+	err := db.QueryRow(scanStateSelect+` WHERE music_folder_id = ?`, folderID).Scan(
+		&s.ID, &s.MusicFolderID, &s.Status, &s.StartedAt, &s.FinishedAt, &s.FilesSeen, &s.FilesTotalEstimate,
+		&s.FilesAdded, &s.FilesUpdated, &s.FilesRemoved, &s.ErrorMessage, &s.LastFullScanAt)
+	if errors.Is(err, sql.ErrNoRows) {
+		return nil, ErrNotFound
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &s, nil
+}
+
+func ListScanStates(db *sql.DB) ([]*ScanState, error) {
+	rows, err := db.Query(scanStateSelect)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []*ScanState
+	for rows.Next() {
+		var s ScanState
+		if err := rows.Scan(&s.ID, &s.MusicFolderID, &s.Status, &s.StartedAt, &s.FinishedAt, &s.FilesSeen, &s.FilesTotalEstimate,
+			&s.FilesAdded, &s.FilesUpdated, &s.FilesRemoved, &s.ErrorMessage, &s.LastFullScanAt); err != nil {
+			return nil, err
+		}
+		out = append(out, &s)
+	}
+	return out, rows.Err()
+}
+
+func StartScan(db *sql.DB, folderID string) error {
+	_, err := db.Exec(`UPDATE scan_state SET status='scanning', started_at=strftime('%Y-%m-%dT%H:%M:%fZ','now'), finished_at=NULL,
+		files_seen=0, files_added=0, files_updated=0, files_removed=0, error_message='' WHERE music_folder_id=?`, folderID)
+	return err
+}
+
+func UpdateScanProgress(db *sql.DB, folderID string, filesSeen, filesAdded, filesUpdated int) error {
+	_, err := db.Exec(`UPDATE scan_state SET files_seen=?, files_added=?, files_updated=? WHERE music_folder_id=?`,
+		filesSeen, filesAdded, filesUpdated, folderID)
+	return err
+}
+
+func FinishScan(db *sql.DB, folderID string, filesRemoved int, errMsg string) error {
+	status := "idle"
+	if errMsg != "" {
+		status = "error"
+	}
+	_, err := db.Exec(`UPDATE scan_state SET status=?, finished_at=strftime('%Y-%m-%dT%H:%M:%fZ','now'), files_removed=?, error_message=?,
+		last_full_scan_at=strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE music_folder_id=?`, status, filesRemoved, errMsg, folderID)
+	return err
+}