Rename media constraints model and store.

webrtc/examples/objc/AppRTCMobile/ios/ARDMediaConstraintsModel.m

-/*
- *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#import "ARDMediaConstraintsModel+Private.h"
-#import "ARDMediaConstraintsSettingsStore.h"
-#import "WebRTC/RTCMediaConstraints.h"
-
-NS_ASSUME_NONNULL_BEGIN
-static NSArray<NSString *> *videoResolutionsStaticValues() {
-  return @[ @"640x480", @"960x540", @"1280x720" ];
-}
-
-@interface ARDMediaConstraintsModel () {
-  ARDMediaConstraintsSettingsStore *_settingsStore;
-}
-@end
-
-@implementation ARDMediaConstraintsModel
-
-- (NSArray<NSString *> *)availableVideoResoultionsMediaConstraints {
-  return videoResolutionsStaticValues();
-}
-
-- (NSString *)currentVideoResoultionConstraintFromStore {
-  NSString *constraint = [[self settingsStore] videoResolutionConstraintsSetting];
-  if (!constraint) {
-    constraint = [self defaultVideoResolutionMediaConstraint];
-    // To ensure consistency add the default to the store.
-    [[self settingsStore] setVideoResolutionConstraintsSetting:constraint];
-  }
-  return constraint;
-}
-
-- (BOOL)storeVideoResoultionConstraint:(NSString *)constraint {
-  if (![[self availableVideoResoultionsMediaConstraints] containsObject:constraint]) {
-    return NO;
-  }
-  [[self settingsStore] setVideoResolutionConstraintsSetting:constraint];
-  return YES;
-}
-
-#pragma mark - Testable
-
-- (ARDMediaConstraintsSettingsStore *)settingsStore {
-  if (!_settingsStore) {
-    _settingsStore = [[ARDMediaConstraintsSettingsStore alloc] init];
-  }
-  return _settingsStore;
-}
-
-- (nullable NSString *)currentVideoResolutionWidthFromStore {
-  NSString *mediaConstraintFromStore = [self currentVideoResoultionConstraintFromStore];
-
-  return [self videoResolutionComponentAtIndex:0 inConstraintsString:mediaConstraintFromStore];
-}
-
-- (nullable NSString *)currentVideoResolutionHeightFromStore {
-  NSString *mediaConstraintFromStore = [self currentVideoResoultionConstraintFromStore];
-  return [self videoResolutionComponentAtIndex:1 inConstraintsString:mediaConstraintFromStore];
-}
-
-#pragma mark -
-
-- (NSString *)defaultVideoResolutionMediaConstraint {
-  return videoResolutionsStaticValues()[0];
-}
-
-- (nullable NSString *)videoResolutionComponentAtIndex:(int)index
-                                   inConstraintsString:(NSString *)constraint {
-  if (index != 0 && index != 1) {
-    return nil;
-  }
-  NSArray *components = [constraint componentsSeparatedByString:@"x"];
-  if (components.count != 2) {
-    return nil;
-  }
-  return components[index];
-}
-
-#pragma mark - Conversion to RTCMediaConstraints
-
-- (nullable NSDictionary *)currentMediaConstraintFromStoreAsRTCDictionary {
-  NSDictionary *mediaConstraintsDictionary = nil;
-
-  NSString *widthConstraint = [self currentVideoResolutionWidthFromStore];
-  NSString *heightConstraint = [self currentVideoResolutionHeightFromStore];
-  if (widthConstraint && heightConstraint) {
-    mediaConstraintsDictionary = @{
-      kRTCMediaConstraintsMinWidth : widthConstraint,
-      kRTCMediaConstraintsMinHeight : heightConstraint
-    };
-  }
-  return mediaConstraintsDictionary;
-}
-
-@end
-NS_ASSUME_NONNULL_END