Initial

1 files changed, 55 insertions, 0 deletions

diff --git a/Firebase/Database/Core/Operation/FAckUserWrite.m b/Firebase/Database/Core/Operation/FAckUserWrite.m
new file mode 100644
index 0000000..f81e7f5
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+++ b/Firebase/Database/Core/Operation/FAckUserWrite.m
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2017 Google
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "FAckUserWrite.h"
+#import "FPath.h"
+#import "FOperationSource.h"
+#import "FImmutableTree.h"
+
+
+@implementation FAckUserWrite
+
+- (id) initWithPath:(FPath *)operationPath affectedTree:(FImmutableTree *)tree revert:(BOOL)shouldRevert {
+    self = [super init];
+    if (self) {
+        self->_source = [FOperationSource userInstance];
+        self->_type = FOperationTypeAckUserWrite;
+        self->_path = operationPath;
+        self->_affectedTree = tree;
+        self->_revert = shouldRevert;
+    }
+    return self;
+}
+
+- (FAckUserWrite *) operationForChild:(NSString *)childKey {
+    if (![self.path isEmpty]) {
+        NSAssert([self.path.getFront isEqualToString:childKey], @"operationForChild called for unrelated child.");
+        return [[FAckUserWrite alloc] initWithPath:[self.path popFront] affectedTree:self.affectedTree revert:self.revert];
+    } else if (self.affectedTree.value != nil) {
+        NSAssert(self.affectedTree.children.isEmpty, @"affectedTree should not have overlapping affected paths.");
+        // All child locations are affected as well; just return same operation.
+        return self;
+    } else {
+        FImmutableTree *childTree = [self.affectedTree subtreeAtPath:[[FPath alloc] initWith:childKey]];
+        return [[FAckUserWrite alloc] initWithPath:[FPath empty] affectedTree:childTree revert:self.revert];
+    }
+}
+
+- (NSString *) description {
+    return [NSString stringWithFormat:@"FAckUserWrite { path=%@, revert=%d, affectedTree=%@ }", self.path, self.revert, self.affectedTree];
+}
+
+@end