1 files changed, 73 insertions, 0 deletions
diff --git a/Firebase/Database/Core/Operation/FOperationSource.m b/Firebase/Database/Core/Operation/FOperationSource.m
new file mode 100644
index 0000000..9a34a2e
--- /dev/null
+++ b/Firebase/Database/Core/Operation/FOperationSource.m
@@ -0,0 +1,73 @@
+/*
+ * 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 "FOperationSource.h"
+#import "FPath.h"
+#import "FQueryParams.h"
+
+@interface FOperationSource ()
+@property (nonatomic, readwrite) BOOL fromUser;
+@property (nonatomic, readwrite) BOOL fromServer;
+@property (nonatomic, readwrite) BOOL isTagged;
+@property (nonatomic, strong, readwrite) FQueryParams *queryParams;
+@end
+
+@implementation FOperationSource
+
+@synthesize fromUser;
+@synthesize fromServer;
+@synthesize queryParams;
+
+- (id) initWithFromUser:(BOOL)isFromUser fromServer:(BOOL)isFromServer queryParams:(FQueryParams *)params tagged:(BOOL)tagged {
+    self = [super init];
+    if (self) {
+        self.fromUser = isFromUser;
+        self.fromServer = isFromServer;
+        self.queryParams = params;
+        self.isTagged = tagged;
+    }
+    return self;
+}
+
++ (FOperationSource *) userInstance {
+    static FOperationSource *user = nil;
+    static dispatch_once_t userToken;
+    dispatch_once(&userToken, ^{
+        user = [[FOperationSource alloc] initWithFromUser:YES fromServer:NO queryParams:nil tagged:NO];
+    });
+    return user;
+}
+
++ (FOperationSource *) serverInstance {
+    static FOperationSource *server = nil;
+    static dispatch_once_t serverToken;
+    dispatch_once(&serverToken, ^{
+        server = [[FOperationSource alloc] initWithFromUser:NO fromServer:YES queryParams:nil tagged:NO];
+    });
+    return server;
+}
+
++ (FOperationSource *) forServerTaggedQuery:(FQueryParams *)params {
+    return [[FOperationSource alloc] initWithFromUser:NO fromServer:YES queryParams:params tagged:YES];
+}
+
+- (NSString *) description {
+    return [NSString stringWithFormat:@"FOperationSource { fromUser=%d, fromServer=%d, queryId=%@, tagged=%d }",
+                    self.fromUser, self.fromServer, self.queryParams, self.isTagged];
+}
+
+
+@end