File storage rewrite (#2676)

* Restructure data layer part 2 (#2599)
* Refactor and separate image model
* Refactor image query builder
* Handle relationships in image query builder
* Remove relationship management methods
* Refactor gallery model/query builder
* Add scenes to gallery model
* Convert scene model
* Refactor scene models
* Remove unused methods
* Add unit tests for gallery
* Add image tests
* Add scene tests
* Convert unnecessary scene value pointers to values
* Convert unnecessary pointer values to values
* Refactor scene partial
* Add scene partial tests
* Refactor ImagePartial
* Add image partial tests
* Refactor gallery partial update
* Add partial gallery update tests
* Use zero/null package for null values
* Add files and scan system
* Add sqlite implementation for files/folders
* Add unit tests for files/folders
* Image refactors
* Update image data layer
* Refactor gallery model and creation
* Refactor scene model
* Refactor scenes
* Don't set title from filename
* Allow galleries to freely add/remove images
* Add multiple scene file support to graphql and UI
* Add multiple file support for images in graphql/UI
* Add multiple file for galleries in graphql/UI
* Remove use of some deprecated fields
* Remove scene path usage
* Remove gallery path usage
* Remove path from image
* Move funscript to video file
* Refactor caption detection
* Migrate existing data
* Add post commit/rollback hook system
* Lint. Comment out import/export tests
* Add WithDatabase read only wrapper
* Prepend tasks to list
* Add 32 pre-migration
* Add warnings in release and migration notes

pkg/sqlite/hooks.go

@@ -0,0 +1,50 @@
+package sqlite
+
+import (
+	"context"
+
+	"github.com/stashapp/stash/pkg/txn"
+)
+
+type hookManager struct {
+	postCommitHooks   []txn.TxnFunc
+	postRollbackHooks []txn.TxnFunc
+}
+
+func (m *hookManager) register(ctx context.Context) context.Context {
+	return context.WithValue(ctx, hookManagerKey, m)
+}
+
+func (db *Database) hookManager(ctx context.Context) *hookManager {
+	m, ok := ctx.Value(hookManagerKey).(*hookManager)
+	if !ok {
+		return nil
+	}
+	return m
+}
+
+func (db *Database) executePostCommitHooks(ctx context.Context) {
+	m := db.hookManager(ctx)
+	for _, h := range m.postCommitHooks {
+		// ignore errors
+		_ = h(ctx)
+	}
+}
+
+func (db *Database) executePostRollbackHooks(ctx context.Context) {
+	m := db.hookManager(ctx)
+	for _, h := range m.postRollbackHooks {
+		// ignore errors
+		_ = h(ctx)
+	}
+}
+
+func (db *Database) AddPostCommitHook(ctx context.Context, hook txn.TxnFunc) {
+	m := db.hookManager(ctx)
+	m.postCommitHooks = append(m.postCommitHooks, hook)
+}
+
+func (db *Database) AddPostRollbackHook(ctx context.Context, hook txn.TxnFunc) {
+	m := db.hookManager(ctx)
+	m.postRollbackHooks = append(m.postRollbackHooks, hook)
+}