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103 lines
3.6 KiB
Objective-C
103 lines
3.6 KiB
Objective-C
//
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// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
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//
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#import "TSAttachmentPointer.h"
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#import <SignalServiceKit/SignalServiceKit-Swift.h>
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NS_ASSUME_NONNULL_BEGIN
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@implementation TSAttachmentPointer
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- (nullable instancetype)initWithCoder:(NSCoder *)coder
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{
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self = [super initWithCoder:coder];
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if (!self) {
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return self;
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}
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// A TSAttachmentPointer is a yet-to-be-downloaded attachment.
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// If this is an old TSAttachmentPointer from another session,
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// we know that it failed to complete before the session completed.
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if (![coder containsValueForKey:@"state"]) {
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_state = TSAttachmentPointerStateFailed;
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}
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return self;
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}
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- (instancetype)initWithServerId:(UInt64)serverId
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key:(NSData *)key
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digest:(nullable NSData *)digest
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byteCount:(UInt32)byteCount
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contentType:(NSString *)contentType
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sourceFilename:(nullable NSString *)sourceFilename
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attachmentType:(TSAttachmentType)attachmentType
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{
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self = [super initWithServerId:serverId
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encryptionKey:key
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byteCount:byteCount
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contentType:contentType
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sourceFilename:sourceFilename];
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if (!self) {
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return self;
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}
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_digest = digest;
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_state = TSAttachmentPointerStateEnqueued;
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self.attachmentType = attachmentType;
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return self;
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}
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+ (TSAttachmentPointer *)attachmentPointerFromProto:(SSKProtoAttachmentPointer *)attachmentProto
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{
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OWSAssert(attachmentProto.id != 0);
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OWSAssert(attachmentProto.key != nil);
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OWSAssert(attachmentProto.contentType != nil);
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// digest will be empty for old clients.
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NSData *digest = attachmentProto.hasDigest ? attachmentProto.digest : nil;
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TSAttachmentType attachmentType = TSAttachmentTypeDefault;
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if ([attachmentProto hasFlags]) {
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UInt32 flags = attachmentProto.flags;
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if ((flags & (UInt32)SSKProtoAttachmentPointerFlagsVoiceMessage) > 0) {
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attachmentType = TSAttachmentTypeVoiceMessage;
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}
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}
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TSAttachmentPointer *pointer = [[TSAttachmentPointer alloc] initWithServerId:attachmentProto.id
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key:attachmentProto.key
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digest:digest
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byteCount:attachmentProto.size
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contentType:attachmentProto.contentType
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sourceFilename:attachmentProto.fileName
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attachmentType:attachmentType];
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return pointer;
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}
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- (BOOL)isDecimalNumberText:(NSString *)text
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{
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return [text componentsSeparatedByCharactersInSet:[NSCharacterSet decimalDigitCharacterSet]].count == 1;
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}
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- (void)upgradeFromAttachmentSchemaVersion:(NSUInteger)attachmentSchemaVersion
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{
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// Legacy instances of TSAttachmentPointer apparently used the serverId as their
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// uniqueId.
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if (attachmentSchemaVersion < 2 && self.serverId == 0) {
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OWSAssert([self isDecimalNumberText:self.uniqueId]);
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if ([self isDecimalNumberText:self.uniqueId]) {
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// For legacy instances, try to parse the serverId from the uniqueId.
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self.serverId = [self.uniqueId integerValue];
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} else {
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OWSLogError(@"invalid legacy attachment uniqueId: %@.", self.uniqueId);
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}
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}
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}
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@end
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NS_ASSUME_NONNULL_END
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