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53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
5 years ago
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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NS_ASSUME_NONNULL_BEGIN
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extern NSString *const kAttachmentDownloadProgressNotification;
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extern NSString *const kAttachmentDownloadProgressKey;
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extern NSString *const kAttachmentDownloadAttachmentIDKey;
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5 years ago
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@class SNProtoAttachmentPointer;
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5 years ago
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@class TSAttachment;
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@class TSAttachmentPointer;
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@class TSAttachmentStream;
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@class TSMessage;
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@class YapDatabaseReadTransaction;
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@class YapDatabaseReadWriteTransaction;
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#pragma mark -
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/**
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* Given incoming attachment protos, determines which we support.
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* It can download those that we support and notifies threads when it receives unsupported attachments.
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*/
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@interface OWSAttachmentDownloads : NSObject
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- (nullable NSNumber *)downloadProgressForAttachmentId:(NSString *)attachmentId;
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// This will try to download all un-downloaded attachments for a given message.
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// Any attachments for the message which are already downloaded are skipped BUT
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// they are included in the success callback.
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//
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// success/failure are always called on a worker queue.
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- (void)downloadAttachmentsForMessage:(TSMessage *)message
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transaction:(YapDatabaseReadTransaction *)transaction
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success:(void (^)(NSArray<TSAttachmentStream *> *attachmentStreams))success
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failure:(void (^)(NSError *error))failure;
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// This will try to download a single attachment.
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//
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// success/failure are always called on a worker queue.
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- (void)downloadAttachmentPointer:(TSAttachmentPointer *)attachmentPointer
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success:(void (^)(NSArray<TSAttachmentStream *> *attachmentStreams))success
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failure:(void (^)(NSError *error))failure;
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- (void)continueDownloadIfPossible;
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@end
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NS_ASSUME_NONNULL_END
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