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//
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//
#import "OWSFailedAttachmentDownloadsJob.h"
#import "OWSPrimaryStorage.h"
#import "TSAttachmentPointer.h"
#import <YapDatabase/YapDatabase.h>
#import <YapDatabase/YapDatabaseQuery.h>
#import <YapDatabase/YapDatabaseSecondaryIndex.h>
#import <SignalUtilitiesKit/SignalUtilitiesKit-Swift.h>
NS_ASSUME_NONNULL_BEGIN
static NSString *const OWSFailedAttachmentDownloadsJobAttachmentStateColumn = @"state";
static NSString *const OWSFailedAttachmentDownloadsJobAttachmentStateIndex = @"index_attachment_downloads_on_state";
@interface OWSFailedAttachmentDownloadsJob ()
@property (nonatomic, readonly) OWSPrimaryStorage *primaryStorage;
@end
#pragma mark -
@implementation OWSFailedAttachmentDownloadsJob
- (instancetype)initWithPrimaryStorage:(OWSPrimaryStorage *)primaryStorage
{
self = [super init];
if (!self) {
return self;
}
_primaryStorage = primaryStorage;
return self;
}
- (NSArray<NSString *> *)fetchAttemptingOutAttachmentIdsWithTransaction:
(YapDatabaseReadWriteTransaction *_Nonnull)transaction
{
OWSAssertDebug(transaction);
NSMutableArray<NSString *> *attachmentIds = [NSMutableArray new];
NSString *formattedString = [NSString stringWithFormat:@"WHERE %@ != %d",
OWSFailedAttachmentDownloadsJobAttachmentStateColumn,
(int)TSAttachmentPointerStateFailed];
YapDatabaseQuery *query = [YapDatabaseQuery queryWithFormat:formattedString];
[[transaction ext:OWSFailedAttachmentDownloadsJobAttachmentStateIndex]
enumerateKeysMatchingQuery:query
usingBlock:^void(NSString *collection, NSString *key, BOOL *stop) {
[attachmentIds addObject:key];
}];
return [attachmentIds copy];
}
- (void)enumerateAttemptingOutAttachmentsWithBlock:(void (^_Nonnull)(TSAttachmentPointer *attachment))block
transaction:(YapDatabaseReadWriteTransaction *_Nonnull)transaction
{
OWSAssertDebug(transaction);
// Since we can't directly mutate the enumerated attachments, we store only their ids in hopes
// of saving a little memory and then enumerate the (larger) TSAttachment objects one at a time.
for (NSString *attachmentId in [self fetchAttemptingOutAttachmentIdsWithTransaction:transaction]) {
TSAttachmentPointer *_Nullable attachment =
[TSAttachmentPointer fetchObjectWithUniqueID:attachmentId transaction:transaction];
if ([attachment isKindOfClass:[TSAttachmentPointer class]]) {
block(attachment);
} else {
OWSLogError(@"unexpected object: %@", attachment);
}
}
}
- (void)run
{
__block uint count = 0;
[LKStorage writeSyncWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
[self enumerateAttemptingOutAttachmentsWithBlock:^(TSAttachmentPointer *attachment) {
// sanity check
if (attachment.state != TSAttachmentPointerStateFailed) {
attachment.state = TSAttachmentPointerStateFailed;
[attachment saveWithTransaction:transaction];
count++;
}
}
transaction:transaction];
}];
OWSLogDebug(@"Marked %u attachments as unsent", count);
}
#pragma mark - YapDatabaseExtension
+ (YapDatabaseSecondaryIndex *)indexDatabaseExtension
{
YapDatabaseSecondaryIndexSetup *setup = [YapDatabaseSecondaryIndexSetup new];
[setup addColumn:OWSFailedAttachmentDownloadsJobAttachmentStateColumn
withType:YapDatabaseSecondaryIndexTypeInteger];
YapDatabaseSecondaryIndexHandler *handler =
[YapDatabaseSecondaryIndexHandler withObjectBlock:^(YapDatabaseReadTransaction *transaction,
NSMutableDictionary *dict,
NSString *collection,
NSString *key,
id object) {
if (![object isKindOfClass:[TSAttachmentPointer class]]) {
return;
}
TSAttachmentPointer *attachment = (TSAttachmentPointer *)object;
dict[OWSFailedAttachmentDownloadsJobAttachmentStateColumn] = @(attachment.state);
}];
return [[YapDatabaseSecondaryIndex alloc] initWithSetup:setup handler:handler versionTag:nil];
}
#ifdef DEBUG
// Useful for tests, don't use in app startup path because it's slow.
- (void)blockingRegisterDatabaseExtensions
{
[self.primaryStorage registerExtension:[self.class indexDatabaseExtension]
withName:OWSFailedAttachmentDownloadsJobAttachmentStateIndex];
}
#endif
+ (NSString *)databaseExtensionName
{
return OWSFailedAttachmentDownloadsJobAttachmentStateIndex;
}
+ (void)asyncRegisterDatabaseExtensionsWithPrimaryStorage:(OWSStorage *)storage
{
[storage asyncRegisterExtension:[self indexDatabaseExtension]
withName:OWSFailedAttachmentDownloadsJobAttachmentStateIndex];
}
@end
NS_ASSUME_NONNULL_END