Fix some bugs and add implmentation

Author: morganchen12

FirebaseCore/Sources/FIREmulatorSettings.m

@@ -0,0 +1,93 @@
+/*
+ * Copyright 2020 Google LLC
+ *
+ * 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 "FIREmulatorSettings.h"
+
+/** :nodoc: */
+NSString *const FIREmulatorServiceDatabase = @"FIREmulatorServiceDatabase";
+
+/** :nodoc: */
+NSString *const FIREmulatorServiceFirestore = @"FIREmulatorServiceFirestore";
+
+/** :nodoc: */
+NSString *const FIREmulatorServiceAuth = @"FIREmulatorServiceAuth";
+
+/** :nodoc: */
+NSString *const FIREmulatorServiceFunctions = @"FIREmulatorServiceFunctions";
+
+@implementation FIREmulatorServiceSettings
+
+- (instancetype)init {
+  NSAssert(NO, @"The default initializer is unavailable. Call the designated initializer instead.");
+}
+
+- (instancetype)initWithHost:(NSString *)host port:(NSInteger)port {
+  NSAssert(host != nil, @"A nonnull host is required");
+  self = [super init];
+  if (self != nil) {
+    _host = [host copy];
+    _port = port;
+  }
+  return self;
+}
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+  return self;  // instances are immutable, so return self
+}
+
+@end
+
+@interface FIREmulatorSettings ()
+
+@property(nonatomic, copy, nonnull)
+    NSDictionary<FIREmulatorService *, FIREmulatorServiceSettings *> *settings;
+
+@end
+
+@implementation FIREmulatorSettings
+
+- (instancetype)init {
+  NSAssert(NO, @"The default initializer is unavailable. Call the designated initializer instead.");
+}
+
+- (instancetype)initWithSettings:
+    (NSDictionary<FIREmulatorService *, FIREmulatorServiceSettings *> *)settings {
+  NSAssert(settings.count > 0,
+           @"Creating emulator settings requires non-empty service settings list.");
+  self = [super init];
+  if (self != nil) {
+    _settings = [settings copy];
+  }
+  return self;
+}
+
+- (instancetype)initWithServiceSettings:(FIREmulatorServiceSettings *)settings
+                             forService:(FIREmulatorService *)service {
+  NSAssert(settings != nil);
+  NSAssert(service != nil);
+  NSDictionary *settings = @{service : settings};
+  return [self initWithSettings:settings];
+}
+
+- (instancetype)copyWithZone:(NSZone *)zone {
+  return self;  // immutable, so return self
+}
+
+- (FIREmulatorSettings *)settingsForService:(FIREmulatorService *)service {
+  return self.settings[service];
+}
+
+@end

FirebaseCore/Sources/Public/FIREmulatorSettings.h

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import Foundation
+#import <Foundation/Foundation.h>
 
 NS_ASSUME_NONNULL_BEGIN
 
@@ -35,13 +35,13 @@ NSString *const FIREmulatorServiceFunctions;
 
 /// A class representing the connection settings for an emulated Firebase service.
 NS_SWIFT_NAME(EmulatorServiceSettings)
-@interface FIREmulatorServiceSettings: NSObject <NSCopying>
+@interface FIREmulatorServiceSettings : NSObject <NSCopying>
 
 /// The host of the emulated service, "localhost" for example.
-@property (nonatomic, readonly) NSString *host;
+@property(nonatomic, readonly) NSString *host;
 
 /// The port number of the emulated service.
-@property (nonatomic, readonly) NSInteger port;
+@property(nonatomic, readonly) NSInteger port;
 
 /// Creates a new instance with the specified host name and port number.
 - (instancetype)initWithHost:(NSString *)host port:(NSInteger)port NS_DESIGNATED_INITIALIZER;
@@ -53,15 +53,17 @@ NS_SWIFT_NAME(EmulatorServiceSettings)
 
 /// A class representing per-app settings for emulated Firebase services.
 NS_SWIFT_NAME(EmulatorSettings)
-@interface FIREmulatorSettings: NSObject <NSCopying>
+@interface FIREmulatorSettings : NSObject <NSCopying>
 
 /// Initializes an app-level settings instance with the given emulator service settings.
 - (instancetype)initWithServiceSettings:(FIREmulatorServiceSettings *)settings
                              forService:(FIREmulatorService *)service;
 
 /// Initializes an app-level settings instance with all of the provided settings.
 /// The provided settings dictionary must not be empty.
-- (instancetype)initWithSettings:(NSDictionary<FIREmulatorService *, FIREmulatorServiceSettings *> *)settings NS_DESIGNATED_INITIALIZER;
+- (instancetype)initWithSettings:
+    (NSDictionary<FIREmulatorService *, FIREmulatorServiceSettings *> *)settings
+    NS_DESIGNATED_INITIALIZER;
 
 /// Returns the service-level settings object for a given emulated service, if it exists.
 - (FIREmulatorSettings *_Nullable)settingsForService:(FIREmulatorService *)service;