mirror of
https://github.com/truewhile/MeBox.git
synced 2026-09-28 11:16:37 +08:00
truewhile
92 lines
3.4 KiB
Go
92 lines
3.4 KiB
Go
package database
|
|
|
|
import "gorm.io/gorm"
|
|
|
|
// mediaSearchIndexSchemaVersion identifies the physical FTS index layout.
|
|
// v2 aligns FTS rowids with media rowids and keeps the index current with
|
|
// triggers.
|
|
const mediaSearchIndexSchemaVersion = 2
|
|
|
|
func ensureMediaSearchIndex(db *gorm.DB) error {
|
|
if err := ensureMediaSearchMetaTable(db); err != nil {
|
|
return err // meta 表创建失败必须上抛，不能静默掩盖
|
|
}
|
|
version := currentMediaSearchIndexVersion(db)
|
|
if version != mediaSearchIndexSchemaVersion {
|
|
resetMediaSearchIndex(db)
|
|
}
|
|
if !createMediaSearchFTSTable(db) {
|
|
return nil
|
|
}
|
|
if err := createMediaSearchTriggers(db); err != nil {
|
|
return err
|
|
}
|
|
if version != mediaSearchIndexSchemaVersion {
|
|
return markMediaSearchIndexVersion(db)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func ensureMediaSearchMetaTable(db *gorm.DB) error {
|
|
return db.Exec(`CREATE TABLE IF NOT EXISTS media_search_meta (id INTEGER PRIMARY KEY CHECK (id = 1), version INTEGER NOT NULL)`).Error
|
|
}
|
|
|
|
func currentMediaSearchIndexVersion(db *gorm.DB) int {
|
|
var version int
|
|
_ = db.Raw(`SELECT version FROM media_search_meta WHERE id = 1`).Scan(&version).Error
|
|
return version
|
|
}
|
|
|
|
func resetMediaSearchIndex(db *gorm.DB) {
|
|
for _, stmt := range []string{
|
|
`DROP TRIGGER IF EXISTS media_search_fts_ai`,
|
|
`DROP TRIGGER IF EXISTS media_search_fts_au`,
|
|
`DROP TRIGGER IF EXISTS media_search_fts_ad`,
|
|
`DROP TABLE IF EXISTS media_search_fts`,
|
|
} {
|
|
_ = db.Exec(stmt).Error
|
|
}
|
|
}
|
|
|
|
func createMediaSearchFTSTable(db *gorm.DB) bool {
|
|
if err := db.Exec(`CREATE VIRTUAL TABLE IF NOT EXISTS media_search_fts USING fts5(media_id UNINDEXED, title, original_name, path, genres, tokenize='trigram')`).Error; err == nil {
|
|
return true
|
|
}
|
|
if err := db.Exec(`CREATE VIRTUAL TABLE IF NOT EXISTS media_search_fts USING fts5(media_id UNINDEXED, title, original_name, path, genres, tokenize='unicode61')`).Error; err == nil {
|
|
return true
|
|
}
|
|
// FTS is an acceleration path. Some embedded SQLite builds may omit FTS5;
|
|
// keep startup working and let repository queries fall back to LIKE search.
|
|
return false
|
|
}
|
|
|
|
func createMediaSearchTriggers(db *gorm.DB) error {
|
|
for _, stmt := range mediaSearchTriggerStatements {
|
|
if err := db.Exec(stmt).Error; err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var mediaSearchTriggerStatements = []string{
|
|
`CREATE TRIGGER IF NOT EXISTS media_search_fts_ai AFTER INSERT ON media WHEN new.deleted_at IS NULL BEGIN
|
|
DELETE FROM media_search_fts WHERE rowid = new.rowid;
|
|
INSERT INTO media_search_fts(rowid, media_id, title, original_name, path, genres)
|
|
VALUES (new.rowid, new.id, COALESCE(new.title, ''), COALESCE(new.original_name, ''), COALESCE(new.path, ''), COALESCE(new.genres, ''));
|
|
END`,
|
|
`CREATE TRIGGER IF NOT EXISTS media_search_fts_au AFTER UPDATE OF title, original_name, path, genres, deleted_at ON media BEGIN
|
|
DELETE FROM media_search_fts WHERE rowid = old.rowid;
|
|
INSERT INTO media_search_fts(rowid, media_id, title, original_name, path, genres)
|
|
SELECT new.rowid, new.id, COALESCE(new.title, ''), COALESCE(new.original_name, ''), COALESCE(new.path, ''), COALESCE(new.genres, '')
|
|
WHERE new.deleted_at IS NULL;
|
|
END`,
|
|
`CREATE TRIGGER IF NOT EXISTS media_search_fts_ad AFTER DELETE ON media BEGIN
|
|
DELETE FROM media_search_fts WHERE rowid = old.rowid;
|
|
END`,
|
|
}
|
|
|
|
func markMediaSearchIndexVersion(db *gorm.DB) error {
|
|
return db.Exec(`INSERT INTO media_search_meta(id, version) VALUES (1, ?) ON CONFLICT(id) DO UPDATE SET version = excluded.version`, mediaSearchIndexSchemaVersion).Error
|
|
}
|