SQLite model refactoring (#3791)

* Remove ID from PerformerPartial
* Separate studio model from sqlite model
* Separate movie model from sqlite model
* Separate tag model from sqlite model
* Separate saved filter model from sqlite model
* Separate scene marker model from sqlite model
* Separate gallery chapter model from sqlite model
* Move ErrNoRows checks into sqlite, improve empty result error messages
* Move SQLiteDate and SQLiteTimestamp to sqlite
* Use changesetTranslator everywhere, refactor for consistency
* Make PerformerStore.DestroyImage private
* Fix rating on movie create

pkg/sqlite/timestamp.go

@@ -0,0 +1,67 @@
+package sqlite
+
+import (
+	"database/sql/driver"
+	"time"
+)
+
+// Timestamp represents a time stored in RFC3339 format.
+type Timestamp struct {
+	Timestamp time.Time
+}
+
+// Scan implements the Scanner interface.
+func (t *Timestamp) Scan(value interface{}) error {
+	t.Timestamp = value.(time.Time)
+	return nil
+}
+
+// Value implements the driver Valuer interface.
+func (t Timestamp) Value() (driver.Value, error) {
+	return t.Timestamp.Format(time.RFC3339), nil
+}
+
+// NullTimestamp represents a nullable time stored in RFC3339 format.
+type NullTimestamp struct {
+	Timestamp time.Time
+	Valid     bool
+}
+
+// Scan implements the Scanner interface.
+func (t *NullTimestamp) Scan(value interface{}) error {
+	var ok bool
+	t.Timestamp, ok = value.(time.Time)
+	if !ok {
+		t.Timestamp = time.Time{}
+		t.Valid = false
+		return nil
+	}
+
+	t.Valid = true
+	return nil
+}
+
+// Value implements the driver Valuer interface.
+func (t NullTimestamp) Value() (driver.Value, error) {
+	if !t.Valid {
+		return nil, nil
+	}
+
+	return t.Timestamp.Format(time.RFC3339), nil
+}
+
+func (t NullTimestamp) TimePtr() *time.Time {
+	if !t.Valid {
+		return nil
+	}
+
+	timestamp := t.Timestamp
+	return &timestamp
+}
+
+func NullTimestampFromTimePtr(t *time.Time) NullTimestamp {
+	if t == nil {
+		return NullTimestamp{Valid: false}
+	}
+	return NullTimestamp{Timestamp: *t, Valid: true}
+}