| commit | author | age | ||
| bad748 | 1 | // Copyright (c) 2014-present, Facebook, Inc. All rights reserved. |
| W | 2 | // |
| 3 | // You are hereby granted a non-exclusive, worldwide, royalty-free license to use, | |
| 4 | // copy, modify, and distribute this software in source code or binary form for use | |
| 5 | // in connection with the web services and APIs provided by Facebook. | |
| 6 | // | |
| 7 | // As with any software that integrates with the Facebook platform, your use of | |
| 8 | // this software is subject to the Facebook Developer Principles and Policies | |
| 9 | // [http://developers.facebook.com/policy/]. This copyright notice shall be | |
| 10 | // included in all copies or substantial portions of the software. | |
| 11 | // | |
| 12 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 13 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | |
| 14 | // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | |
| 15 | // COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | |
| 16 | // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
| 17 | // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
| 18 | ||
| 19 | #import <Foundation/Foundation.h> | |
| 20 | ||
| 21 | #import "FBSDKConstants.h" | |
| 22 | ||
| 23 | @class FBSDKGraphErrorRecoveryProcessor; | |
| 24 | @class FBSDKGraphRequest; | |
| 25 | ||
| 26 | /*! | |
| 27 | @abstract Defines a delegate for `FBSDKGraphErrorRecoveryProcessor`. | |
| 28 | */ | |
| 29 | @protocol FBSDKGraphErrorRecoveryProcessorDelegate<NSObject> | |
| 30 | ||
| 31 | /*! | |
| 32 | @abstract Indicates the error recovery has been attempted. | |
| 33 | @param processor the processor instance. | |
| 34 | @param didRecover YES if the recovery was successful. | |
| 35 | @param error the error that that was attempted to be recovered from. | |
| 36 | */ | |
| 37 | - (void)processorDidAttemptRecovery:(FBSDKGraphErrorRecoveryProcessor *)processor didRecover:(BOOL)didRecover error:(NSError *)error; | |
| 38 | ||
| 39 | @optional | |
| 40 | /*! | |
| 41 | @abstract Indicates the processor is about to process the error. | |
| 42 | @param processor the processor instance. | |
| 43 | @param error the error is about to be processed. | |
| 44 | @discussion return NO if the processor should not process the error. For example, | |
| 45 | if you want to prevent alerts of localized messages but otherwise perform retries and recoveries, | |
| 46 | you could return NO for errors where userInfo[FBSDKGraphRequestErrorCategoryKey] equal to FBSDKGraphRequestErrorCategoryOther | |
| 47 | */ | |
| 48 | - (BOOL)processorWillProcessError:(FBSDKGraphErrorRecoveryProcessor *)processor error:(NSError *)error; | |
| 49 | ||
| 50 | @end | |
| 51 | ||
| 52 | /*! | |
| 53 | @abstract Defines a type that can process Facebook NSErrors with best practices. | |
| 54 | @discussion Facebook NSErrors can contain FBSDKErrorRecoveryAttempting instances to recover from errors, or | |
| 55 | localized messages to present to the user. This class will process the instances as follows: | |
| 56 | ||
| 57 | 1. If the error is temporary as indicated by FBSDKGraphRequestErrorCategoryKey, assume the recovery succeeded and | |
| 58 | notify the delegate. | |
| 59 | 2. If a FBSDKErrorRecoveryAttempting instance is available, display an alert (dispatched to main thread) | |
| 60 | with the recovery options and call the instance's [ attemptRecoveryFromError:optionIndex:...]. | |
| 61 | 3. If a FBSDKErrorRecoveryAttempting is not available, check the userInfo for FBSDKLocalizedErrorDescriptionKey | |
| 62 | and present that in an alert (dispatched to main thread). | |
| 63 | ||
| 64 | By default, FBSDKGraphRequests use this type to process errors and retry the request upon a successful | |
| 65 | recovery. | |
| 66 | ||
| 67 | Note that Facebook recovery attempters can present UI or even cause app switches (such as to login). Any such | |
| 68 | work is dispatched to the main thread (therefore your request handlers may then run on the main thread). | |
| 69 | ||
| 70 | Login recovery requires FBSDKLoginKit. Login will use FBSDKLoginBehaviorNative and will prompt the user | |
| 71 | for all permissions last granted. If any are declined on the new request, the recovery is not successful but | |
| 72 | the `[FBSDKAccessToken currentAccessToken]` might still have been updated. | |
| 73 | . | |
| 74 | */ | |
| 75 | @interface FBSDKGraphErrorRecoveryProcessor : NSObject | |
| 76 | ||
| 77 | /*! | |
| 78 | @abstract Gets the delegate. Note this is a strong reference, and is nil'ed out after recovery is complete. | |
| 79 | */ | |
| 80 | @property (nonatomic, strong, readonly) id<FBSDKGraphErrorRecoveryProcessorDelegate>delegate; | |
| 81 | ||
| 82 | /*! | |
| 83 | @abstract Attempts to process the error, return YES if the error can be processed. | |
| 84 | @param error the error to process. | |
| 85 | @param request the relateed request that may be reissued. | |
| 86 | @param delegate the delegate that will be retained until recovery is complete. | |
| 87 | */ | |
| 88 | - (BOOL)processError:(NSError *)error request:(FBSDKGraphRequest *)request delegate:(id<FBSDKGraphErrorRecoveryProcessorDelegate>) delegate; | |
| 89 | ||
| 90 | /*! | |
| 91 | @abstract The callback for FBSDKErrorRecoveryAttempting | |
| 92 | @param didRecover if the recovery succeeded | |
| 93 | @param contextInfo unused | |
| 94 | */ | |
| 95 | - (void)didPresentErrorWithRecovery:(BOOL)didRecover contextInfo:(void *)contextInfo; | |
| 96 | ||
| 97 | @end | |
