adding pods method of package managing

Pods/AppAuth/Source/AppAuthCore/OIDFieldMapping.m

@@ -0,0 +1,132 @@
+/*! @file OIDFieldMapping.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        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 "OIDFieldMapping.h"
+
+#import "OIDDefines.h"
+
+@implementation OIDFieldMapping
+
+- (nonnull instancetype)init
+    OID_UNAVAILABLE_USE_INITIALIZER(@selector(initWithName:type:conversion:))
+
+- (instancetype)initWithName:(NSString *)name
+                                 type:(Class)type {
+  return [self initWithName:name type:type conversion:nil];
+}
+
+- (instancetype)initWithName:(NSString *)name
+                                 type:(Class)type
+                           conversion:(nullable OIDFieldMappingConversionFunction)conversion {
+  self = [super init];
+  if (self) {
+    _name = [name copy];
+    _expectedType = type;
+    _conversion = conversion;
+  }
+  return self;
+}
+
++ (NSDictionary<NSString *, NSObject<NSCopying> *> *)remainingParametersWithMap:
+    (NSDictionary<NSString *, OIDFieldMapping *> *)map
+    parameters:(NSDictionary<NSString *, NSObject<NSCopying> *> *)parameters
+      instance:(id)instance {
+  NSMutableDictionary *additionalParameters = [NSMutableDictionary dictionary];
+  for (NSString *key in parameters) {
+    NSObject<NSCopying> *value = [parameters[key] copy];
+    OIDFieldMapping *mapping = map[key];
+    // If the field doesn't appear in the mapping, we add it to the additional parameters
+    // dictionary.
+    if (!mapping) {
+      additionalParameters[key] = value;
+      continue;
+    }
+    // If the field mapping specifies a conversion function, apply the conversion to the value.
+    if (mapping.conversion) {
+      value = mapping.conversion(value);
+    }
+    // Check the type of the value and make sure it matches the type we expected. If it doesn't we
+    // add the value to the additional parameters dictionary but don't assign the instance variable.
+    if (![value isKindOfClass:mapping.expectedType]) {
+      additionalParameters[key] = value;
+      continue;
+    }
+    // Assign the instance variable.
+    [instance setValue:value forKey:mapping.name];
+  }
+  return additionalParameters;
+}
+
++ (void)encodeWithCoder:(NSCoder *)aCoder
+                    map:(NSDictionary<NSString *, OIDFieldMapping *> *)map
+               instance:(id)instance {
+  for (NSString *key in map) {
+    id value = [instance valueForKey:map[key].name];
+    [aCoder encodeObject:value forKey:key];
+  }
+}
+
++ (void)decodeWithCoder:(NSCoder *)aCoder
+                    map:(NSDictionary<NSString *, OIDFieldMapping *> *)map
+               instance:(id)instance {
+  for (NSString *key in map) {
+    OIDFieldMapping *mapping = map[key];
+    id value = [aCoder decodeObjectOfClass:mapping.expectedType forKey:key];
+    [instance setValue:value forKey:mapping.name];
+  }
+}
+
++ (NSSet *)JSONTypes {
+  return [NSSet setWithArray:@[
+    [NSDictionary class],
+    [NSArray class],
+    [NSString class],
+    [NSNumber class]
+  ]];
+}
+
++ (OIDFieldMappingConversionFunction)URLConversion {
+  return ^id _Nullable(NSObject *_Nullable value) {
+    if ([value isKindOfClass:[NSString class]]) {
+      return [NSURL URLWithString:(NSString *)value];
+    }
+    return value;
+  };
+}
+
++ (OIDFieldMappingConversionFunction)dateSinceNowConversion {
+  return ^id _Nullable(NSObject *_Nullable value) {
+    if (![value isKindOfClass:[NSNumber class]]) {
+      return value;
+    }
+    NSNumber *valueAsNumber = (NSNumber *)value;
+    return [NSDate dateWithTimeIntervalSinceNow:[valueAsNumber longLongValue]];
+  };
+}
+
++ (OIDFieldMappingConversionFunction)dateEpochConversion {
+  return ^id _Nullable(NSObject *_Nullable value) {
+    if (![value isKindOfClass:[NSNumber class]]) {
+      return value;
+    }
+    NSNumber *valueAsNumber = (NSNumber *) value;
+    return [NSDate dateWithTimeIntervalSince1970:[valueAsNumber longLongValue]];
+  };
+}
+
+@end