Support additional insert modes

moor/lib/src/runtime/statements/insert.dart

@@ -24,17 +24,26 @@ class InsertStatement<D extends DataClass> {
   /// must be set and non-null. Otherwise, an [InvalidDataException] will be
   /// thrown.
   ///
-  /// If [orReplace] is true and a row with the same primary key already exists,
-  /// the columns of that row will be updated and no new row will be written.
-  /// Otherwise, an exception will be thrown.
+  /// By default, an exception will be thrown if another row with the same
+  /// primary key already exists. This behavior can be overridden with [mode],
+  /// for instance by using [InsertMode.replace] or [InsertMode.insertOrIgnore].
   ///
   /// If the table contains an auto-increment column, the generated value will
   /// be returned. If there is no auto-increment column, you can't rely on the
   /// return value, but the future will resolve to an error when the insert
   /// fails.
-  Future<int> insert(Insertable<D> entity, {bool orReplace = false}) async {
+  Future<int> insert(
+    Insertable<D> entity, {
+    @Deprecated('Use mode: InsertMode.replace instead') bool orReplace = false,
+    InsertMode mode,
+  }) async {
+    assert(
+      mode == null || (orReplace != true),
+      'If the mode parameter is set on insertAll, orReplace must be null or '
+      'false',
+    );
     _validateIntegrity(entity);
-    final ctx = _createContext(entity, orReplace);
+    final ctx = _createContext(entity, _resolveMode(mode, orReplace));
 
     return await database.executor.doWhenOpened((e) async {
       final id = await database.executor.runInsert(ctx.sql, ctx.boundVariables);
@@ -48,11 +57,19 @@ class InsertStatement<D extends DataClass> {
   /// All fields in a row that don't have a default value or auto-increment
   /// must be set and non-null. Otherwise, an [InvalidDataException] will be
   /// thrown.
-  /// When a row with the same primary or unique key already exists in the
-  /// database, the insert will fail. Use [orReplace] to replace rows that
-  /// already exist.
-  Future<void> insertAll(List<Insertable<D>> rows,
-      {bool orReplace = false}) async {
+  /// By default, an exception will be thrown if another row with the same
+  /// primary key already exists. This behavior can be overridden with [mode],
+  /// for instance by using [InsertMode.replace] or [InsertMode.insertOrIgnore].
+  Future<void> insertAll(
+    List<Insertable<D>> rows, {
+    @Deprecated('Use mode: InsertMode.replace instead') bool orReplace = false,
+    InsertMode mode,
+  }) async {
+    assert(
+      mode == null || (orReplace != true),
+      'If the mode parameter is set on insertAll, orReplace must be null or '
+      'false',
+    );
     final statements = <String, List<GenerationContext>>{};
 
     // Not every insert has the same sql, as fields which are set to null are
@@ -61,7 +78,7 @@ class InsertStatement<D extends DataClass> {
     for (var row in rows) {
       _validateIntegrity(row);
 
-      final ctx = _createContext(row, orReplace);
+      final ctx = _createContext(row, _resolveMode(mode, orReplace));
       statements.putIfAbsent(ctx.sql, () => []).add(ctx);
     }
 
@@ -76,14 +93,13 @@ class InsertStatement<D extends DataClass> {
     database.markTablesUpdated({table});
   }
 
-  GenerationContext _createContext(Insertable<D> entry, bool replace) {
+  GenerationContext _createContext(Insertable<D> entry, InsertMode mode) {
     final map = table.entityToSql(entry.createCompanion(true))
       ..removeWhere((_, value) => value == null);
 
     final ctx = GenerationContext.fromDb(database);
     ctx.buffer
-      ..write('INSERT ')
-      ..write(replace ? 'OR REPLACE ' : '')
+      ..write(_insertKeywords[mode])
       ..write(' INTO ')
       ..write(table.$tableName)
       ..write(' ');
@@ -113,6 +129,11 @@ class InsertStatement<D extends DataClass> {
     return ctx;
   }
 
+  InsertMode _resolveMode(InsertMode mode, bool orReplace) {
+    return mode ??
+        (orReplace == true ? InsertMode.insertOrReplace : InsertMode.insert);
+  }
+
   void _validateIntegrity(Insertable<D> d) {
     if (d == null) {
       throw InvalidDataException(
@@ -124,3 +145,46 @@ class InsertStatement<D extends DataClass> {
         .throwIfInvalid(d);
   }
 }
+
+/// Enumeration of different insert behaviors. See the documentation on the
+/// individual fields for details.
+enum InsertMode {
+  /// A regular `INSERT INTO` statement. When a row with the same primary or
+  /// unique key already exists, the insert statement will fail and an exception
+  /// will be thrown. If the exception is caught, previous statements made in
+  /// the same transaction will NOT be reverted.
+  insert,
+
+  /// Identical to [InsertMode.insertOrReplace], included for the sake of
+  /// completeness.
+  replace,
+
+  /// Like [insert], but if a row with the same primary or unique key already
+  /// exists, it will be deleted and re-created with the row being inserted.
+  insertOrReplace,
+
+  /// Similar to [InsertMode.insertOrAbort], but it will revert the surrounding
+  /// transaction if a constraint is violated, even if the thrown exception is
+  /// caught.
+  insertOrRollback,
+
+  /// Identical to [insert], included for the sake of completeness.
+  insertOrAbort,
+
+  /// Like [insert], but if multiple values are inserted with the same insert
+  /// statement and one of them fails, the others will still be completed.
+  insertOrFail,
+
+  /// Like [insert], but failures will be ignored.
+  insertOrIgnore,
+}
+
+const _insertKeywords = <InsertMode, String>{
+  InsertMode.insert: 'INSERT',
+  InsertMode.replace: 'REPLACE',
+  InsertMode.insertOrReplace: 'INSERT OR REPLACE',
+  InsertMode.insertOrRollback: 'INSERT OR ROLLBACK',
+  InsertMode.insertOrAbort: 'INSERT OR ABORT',
+  InsertMode.insertOrFail: 'INSERT OR FAIL',
+  InsertMode.insertOrIgnore: 'INSERT OR IGNORE',
+};

moor/test/insert_test.dart

@@ -37,6 +37,20 @@ void main() {
   });
 
   test('generates insert or replace statements', () async {
+    await db.into(db.todosTable).insert(
+        TodoEntry(
+          id: 113,
+          content: 'Done',
+        ),
+        mode: InsertMode.insertOrReplace);
+
+    verify(executor.runInsert(
+        'INSERT OR REPLACE INTO todos (id, content) VALUES (?, ?)',
+        [113, 'Done']));
+  });
+
+  test('generates insert or replace statements with legacy parameter',
+      () async {
     await db.into(db.todosTable).insert(
         TodoEntry(
           id: 113,