//
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//
#import "ConversationViewModel.h"
#import "ConversationViewItem.h"
#import "DateUtil.h"
#import "OWSMessageBubbleView.h"
#import "OWSQuotedReplyModel.h"
#import "Signal-Swift.h"
#import <SignalCoreKit/NSDate+OWS.h>
#import <SignalMessaging/OWSContactsManager.h>
#import <SignalMessaging/OWSUnreadIndicator.h>
#import <SignalMessaging/ThreadUtil.h>
#import <SignalServiceKit/OWSBlockingManager.h>
#import <SignalServiceKit/OWSPrimaryStorage.h>
#import <SignalServiceKit/SSKEnvironment.h>
#import <SignalServiceKit/TSDatabaseView.h>
#import <SignalServiceKit/TSIncomingMessage.h>
#import <SignalServiceKit/TSOutgoingMessage.h>
#import <SignalServiceKit/TSThread.h>
#import <YapDatabase/YapDatabase.h>
#import <YapDatabase/YapDatabaseAutoView.h>
#import <YapDatabase/YapDatabaseViewChange.h>
NS_ASSUME_NONNULL_BEGIN
@implementation ConversationUpdateItem
- (instancetype)initWithUpdateItemType:(ConversationUpdateItemType)updateItemType
oldIndex:(NSUInteger)oldIndex
newIndex:(NSUInteger)newIndex
viewItem:(nullable id<ConversationViewItem>)viewItem
{
self = [super init];
if (!self) {
return self;
}
_updateItemType = updateItemType;
_oldIndex = oldIndex;
_newIndex = newIndex;
_viewItem = viewItem;
return self;
}
@end
#pragma mark -
@implementation ConversationUpdate
- (instancetype)initWithConversationUpdateType:(ConversationUpdateType)conversationUpdateType
updateItems:(nullable NSArray<ConversationUpdateItem *> *)updateItems
shouldAnimateUpdates:(BOOL)shouldAnimateUpdates
{
self = [super init];
if (!self) {
return self;
}
_conversationUpdateType = conversationUpdateType;
_updateItems = updateItems;
_shouldAnimateUpdates = shouldAnimateUpdates;
return self;
}
+ (ConversationUpdate *)minorUpdate
{
return [[ConversationUpdate alloc] initWithConversationUpdateType:ConversationUpdateType_Minor
updateItems:nil
shouldAnimateUpdates:NO];
}
+ (ConversationUpdate *)reloadUpdate
{
return [[ConversationUpdate alloc] initWithConversationUpdateType:ConversationUpdateType_Reload
updateItems:nil
shouldAnimateUpdates:NO];
}
+ (ConversationUpdate *)diffUpdateWithUpdateItems:(nullable NSArray<ConversationUpdateItem *> *)updateItems
shouldAnimateUpdates:(BOOL)shouldAnimateUpdates
{
return [[ConversationUpdate alloc] initWithConversationUpdateType:ConversationUpdateType_Diff
updateItems:updateItems
shouldAnimateUpdates:shouldAnimateUpdates];
}
@end
#pragma mark -
// Always load up to n messages when user arrives.
//
// The smaller this number is, the faster the conversation can display.
// To test, shrink you accessability font as much as possible, then count how many 1-line system info messages (our
// shortest cells) can fit on screen at a time on an iPhoneX
//
// PERF: we could do less messages on shorter (older, slower) devices
// PERF: we could cache the cell height, since some messages will be much taller.
static const int kYapDatabasePageSize = 25;
// Never show more than n messages in conversation view when user arrives.
static const int kConversationInitialMaxRangeSize = 300;
// Never show more than n messages in conversation view at a time.
static const int kYapDatabaseRangeMaxLength = 25000;
static const int kYapDatabaseRangeMinLength = 0;
#pragma mark -
@interface ConversationViewModel ()
@property (nonatomic, weak) id<ConversationViewModelDelegate> delegate;
@property (nonatomic, readonly) TSThread *thread;
// The mapping must be updated in lockstep with the uiDatabaseConnection.
//
// * The first (required) step is to update uiDatabaseConnection using beginLongLivedReadTransaction.
// * The second (required) step is to update messageMappings.
// * The third (optional) step is to update the messageMappings range using
// updateMessageMappingRangeOptions.
// * The fourth (optional) step is to update the view items using reloadViewItems.
// * The steps must be done in strict order.
// * If we do any of the steps, we must do all of the required steps.
// * We can't use messageMappings or viewItems after the first step until we've
// done the last step; i.e.. we can't do any layout, since that uses the view
// items which haven't been updated yet.
// * If the first and/or second steps changes the set of messages
// their ordering and/or their state, we must do the third and fourth steps.
// * If we do the third step, we must call resetContentAndLayout afterward.
@property (nonatomic) YapDatabaseViewMappings *messageMappings;
@property (nonatomic) NSArray<id<ConversationViewItem>> *viewItems;
@property (nonatomic) NSMutableDictionary<NSString *, id<ConversationViewItem>> *viewItemCache;
@property (nonatomic) NSUInteger lastRangeLength;
@property (nonatomic, nullable) ThreadDynamicInteractions *dynamicInteractions;
@property (nonatomic) BOOL hasClearedUnreadMessagesIndicator;
@property (nonatomic, nullable) NSDate *collapseCutoffDate;
@property (nonatomic, nullable) NSString *typingIndicatorsRecipient;
@end
#pragma mark -
@implementation ConversationViewModel
- (instancetype)initWithThread:(TSThread *)thread
focusMessageIdOnOpen:(nullable NSString *)focusMessageIdOnOpen
delegate:(id<ConversationViewModelDelegate>)delegate
{
self = [super init];
if (!self) {
return self;
}
OWSAssertDebug(thread);
OWSAssertDebug(delegate);
_thread = thread;
_delegate = delegate;
self.focusMessageIdOnOpen = focusMessageIdOnOpen;
[self configure];
return self;
}
#pragma mark - Dependencies
- (OWSPrimaryStorage *)primaryStorage
{
OWSAssertDebug(SSKEnvironment.shared.primaryStorage);
return SSKEnvironment.shared.primaryStorage;
}
- (YapDatabaseConnection *)uiDatabaseConnection
{
return self.primaryStorage.uiDatabaseConnection;
}
- (YapDatabaseConnection *)editingDatabaseConnection
{
return self.primaryStorage.dbReadWriteConnection;
}
- (OWSContactsManager *)contactsManager
{
return (OWSContactsManager *)SSKEnvironment.shared.contactsManager;
}
- (OWSBlockingManager *)blockingManager
{
return OWSBlockingManager.sharedManager;
}
- (id<OWSTypingIndicators>)typingIndicators
{
return SSKEnvironment.shared.typingIndicators;
}
#pragma mark
- (void)addNotificationListeners
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(uiDatabaseDidUpdateExternally:)
name:OWSUIDatabaseConnectionDidUpdateExternallyNotification
object:self.primaryStorage.dbNotificationObject];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(uiDatabaseWillUpdate:)
name:OWSUIDatabaseConnectionWillUpdateNotification
object:self.primaryStorage.dbNotificationObject];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(uiDatabaseDidUpdate:)
name:OWSUIDatabaseConnectionDidUpdateNotification
object:self.primaryStorage.dbNotificationObject];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(applicationDidEnterBackground:)
name:OWSApplicationDidEnterBackgroundNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(signalAccountsDidChange:)
name:OWSContactsManagerSignalAccountsDidChangeNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(typingIndicatorStateDidChange:)
name:[OWSTypingIndicatorsImpl typingIndicatorStateDidChange]
object:nil];
}
- (void)signalAccountsDidChange:(NSNotification *)notification
{
OWSAssertIsOnMainThread();
[self ensureDynamicInteractions];
}
- (void)configure
{
OWSLogInfo(@"");
// We need to update the "unread indicator" _before_ we determine the initial range
// size, since it depends on where the unread indicator is placed.
self.lastRangeLength = 0;
self.typingIndicatorsRecipient = [self.typingIndicators typingIndicatorsForThread:self.thread];
[self ensureDynamicInteractions];
[self.primaryStorage updateUIDatabaseConnectionToLatest];
[self createNewMessageMappings];
if (![self reloadViewItems]) {
OWSFailDebug(@"failed to reload view items in configureForThread.");
}
}
- (void)viewDidLoad
{
[self addNotificationListeners];
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (BOOL)canLoadMoreItems
{
if (self.lastRangeLength >= kYapDatabaseRangeMaxLength) {
return NO;
}
NSUInteger loadWindowSize = [self.messageMappings numberOfItemsInGroup:self.thread.uniqueId];
__block NSUInteger totalMessageCount;
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
totalMessageCount =
[[transaction ext:TSMessageDatabaseViewExtensionName] numberOfItemsInGroup:self.thread.uniqueId];
}];
return loadWindowSize < totalMessageCount;
}
- (void)applicationDidEnterBackground:(NSNotification *)notification
{
if (self.hasClearedUnreadMessagesIndicator) {
self.hasClearedUnreadMessagesIndicator = NO;
[self.dynamicInteractions clearUnreadIndicatorState];
}
}
- (void)viewDidResetContentAndLayout
{
self.collapseCutoffDate = [NSDate new];
if (![self reloadViewItems]) {
OWSFailDebug(@"failed to reload view items in resetContentAndLayout.");
}
}
- (void)loadAnotherPageOfMessages
{
BOOL hasEarlierUnseenMessages = self.dynamicInteractions.unreadIndicator.hasMoreUnseenMessages;
[self loadNMoreMessages:kYapDatabasePageSize];
// Don’t auto-scroll after “loading more messages” unless we have “more unseen messages”.
//
// Otherwise, tapping on "load more messages" autoscrolls you downward which is completely wrong.
if (hasEarlierUnseenMessages && !self.focusMessageIdOnOpen) {
// Ensure view items are updated before trying to scroll to the
// unread indicator.
//
// loadNMoreMessages calls resetMappings which calls ensureDynamicInteractions,
// which may move the unread indicator, and for scrollToUnreadIndicatorAnimated
// to work properly, the view items need to be updated to reflect that change.
[self.primaryStorage updateUIDatabaseConnectionToLatest];
[self.delegate conversationViewModelDidLoadPrevPage];
}
}
- (void)loadNMoreMessages:(NSUInteger)numberOfMessagesToLoad
{
[self.delegate conversationViewModelWillLoadMoreItems];
self.lastRangeLength = MIN(self.lastRangeLength + numberOfMessagesToLoad, (NSUInteger)kYapDatabaseRangeMaxLength);
[self resetMappings];
[self.delegate conversationViewModelDidLoadMoreItems];
}
- (void)updateMessageMappingRangeOptions
{
NSUInteger rangeLength = 0;
if (self.lastRangeLength == 0) {
// If this is the first time we're configuring the range length,
// try to take into account the position of the unread indicator
// and the "focus message".
OWSAssertDebug(self.dynamicInteractions);
if (self.focusMessageIdOnOpen) {
OWSAssertDebug(self.dynamicInteractions.focusMessagePosition);
if (self.dynamicInteractions.focusMessagePosition) {
OWSLogVerbose(@"ensuring load of focus message: %@", self.dynamicInteractions.focusMessagePosition);
rangeLength = MAX(rangeLength, 1 + self.dynamicInteractions.focusMessagePosition.unsignedIntegerValue);
}
}
if (self.dynamicInteractions.unreadIndicator) {
NSUInteger unreadIndicatorPosition
= (NSUInteger)self.dynamicInteractions.unreadIndicator.unreadIndicatorPosition;
// If there is an unread indicator, increase the initial load window
// to include it.
OWSAssertDebug(unreadIndicatorPosition > 0);
OWSAssertDebug(unreadIndicatorPosition <= kYapDatabaseRangeMaxLength);
// We'd like to include at least N seen messages,
// to give the user the context of where they left off the conversation.
const NSUInteger kPreferredSeenMessageCount = 1;
rangeLength = MAX(rangeLength, unreadIndicatorPosition + kPreferredSeenMessageCount);
}
}
// Always try to load at least a single page of messages.
rangeLength = MAX(rangeLength, kYapDatabasePageSize);
// Range size should monotonically increase.
rangeLength = MAX(rangeLength, self.lastRangeLength);
// Enforce max range size.
rangeLength = MIN(rangeLength, kYapDatabaseRangeMaxLength);
self.lastRangeLength = rangeLength;
YapDatabaseViewRangeOptions *rangeOptions =
[YapDatabaseViewRangeOptions flexibleRangeWithLength:rangeLength offset:0 from:YapDatabaseViewEnd];
rangeOptions.maxLength = MAX(rangeLength, kYapDatabaseRangeMaxLength);
rangeOptions.minLength = kYapDatabaseRangeMinLength;
[self.messageMappings setRangeOptions:rangeOptions forGroup:self.thread.uniqueId];
[self.delegate conversationViewModelRangeDidChange];
self.collapseCutoffDate = [NSDate new];
}
- (void)ensureDynamicInteractions
{
OWSAssertIsOnMainThread();
const int currentMaxRangeSize = (int)self.lastRangeLength;
const int maxRangeSize = MAX(kConversationInitialMaxRangeSize, currentMaxRangeSize);
self.dynamicInteractions = [ThreadUtil ensureDynamicInteractionsForThread:self.thread
contactsManager:self.contactsManager
blockingManager:self.blockingManager
dbConnection:self.editingDatabaseConnection
hideUnreadMessagesIndicator:self.hasClearedUnreadMessagesIndicator
lastUnreadIndicator:self.dynamicInteractions.unreadIndicator
focusMessageId:self.focusMessageIdOnOpen
maxRangeSize:maxRangeSize];
}
- (nullable id<ConversationViewItem>)viewItemForUnreadMessagesIndicator
{
for (id<ConversationViewItem> viewItem in self.viewItems) {
if (viewItem.unreadIndicator) {
return viewItem;
}
}
return nil;
}
- (void)clearUnreadMessagesIndicator
{
OWSAssertIsOnMainThread();
// TODO: Remove by making unread indicator a view model concern.
id<ConversationViewItem> _Nullable oldIndicatorItem = [self viewItemForUnreadMessagesIndicator];
if (oldIndicatorItem) {
// TODO ideally this would be happening within the *same* transaction that caused the unreadMessageIndicator
// to be cleared.
[self.editingDatabaseConnection
asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
[oldIndicatorItem.interaction touchWithTransaction:transaction];
}];
}
if (self.hasClearedUnreadMessagesIndicator) {
// ensureDynamicInteractionsForThread is somewhat expensive
// so we don't want to call it unnecessarily.
return;
}
// Once we've cleared the unread messages indicator,
// make sure we don't show it again.
self.hasClearedUnreadMessagesIndicator = YES;
if (self.dynamicInteractions.unreadIndicator) {
// If we've just cleared the "unread messages" indicator,
// update the dynamic interactions.
[self ensureDynamicInteractions];
}
}
#pragma mark - Storage access
- (void)uiDatabaseDidUpdateExternally:(NSNotification *)notification
{
OWSAssertIsOnMainThread();
OWSLogVerbose(@"");
if (self.delegate.shouldObserveDBModifications) {
// External database modifications can't be converted into incremental updates,
// so rebuild everything. This is expensive and usually isn't necessary, but
// there's no alternative.
//
// We don't need to do this if we're not observing db modifications since we'll
// do it when we resume.
[self resetMappings];
}
}
- (void)uiDatabaseWillUpdate:(NSNotification *)notification
{
[self.delegate conversationViewModelWillUpdate];
}
- (void)uiDatabaseDidUpdate:(NSNotification *)notification
{
OWSAssertIsOnMainThread();
OWSLogVerbose(@"");
NSArray *notifications = notification.userInfo[OWSUIDatabaseConnectionNotificationsKey];
OWSAssertDebug([notifications isKindOfClass:[NSArray class]]);
if (![[self.uiDatabaseConnection ext:TSMessageDatabaseViewExtensionName] hasChangesForGroup:self.thread.uniqueId
inNotifications:notifications]) {
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
[self.messageMappings updateWithTransaction:transaction];
}];
[self.delegate conversationViewModelDidUpdate:ConversationUpdate.minorUpdate];
return;
}
NSArray<YapDatabaseViewSectionChange *> *sectionChanges = nil;
NSArray<YapDatabaseViewRowChange *> *rowChanges = nil;
[[self.uiDatabaseConnection ext:TSMessageDatabaseViewExtensionName] getSectionChanges:§ionChanges
rowChanges:&rowChanges
forNotifications:notifications
withMappings:self.messageMappings];
if ([sectionChanges count] == 0 && [rowChanges count] == 0) {
// YapDatabase will ignore insertions within the message mapping's
// range that are not within the current mapping's contents. We
// may need to extend the mapping's contents to reflect the current
// range.
[self updateMessageMappingRangeOptions];
return [self.delegate conversationViewModelDidUpdate:ConversationUpdate.minorUpdate];
}
NSMutableArray<NSString *> *oldItemIdList = [NSMutableArray new];
for (id<ConversationViewItem> viewItem in self.viewItems) {
[oldItemIdList addObject:viewItem.itemId];
}
// We need to reload any modified interactions _before_ we call
// reloadViewItems.
BOOL hasMalformedRowChange = NO;
NSMutableSet<NSString *> *updatedItemSet = [NSMutableSet new];
NSMutableSet<NSString *> *updatedNeighborItemSet = [NSMutableSet new];
for (YapDatabaseViewRowChange *rowChange in rowChanges) {
switch (rowChange.type) {
case YapDatabaseViewChangeUpdate: {
YapCollectionKey *collectionKey = rowChange.collectionKey;
if (collectionKey.key) {
id<ConversationViewItem> _Nullable viewItem = self.viewItemCache[collectionKey.key];
if (viewItem) {
[self reloadInteractionForViewItem:viewItem];
[updatedItemSet addObject:viewItem.itemId];
if (rowChange.changes == YapDatabaseViewChangedDependency) {
[updatedNeighborItemSet addObject:viewItem.itemId];
}
} else {
hasMalformedRowChange = YES;
}
} else if (rowChange.indexPath && rowChange.originalIndex < self.viewItems.count) {
// Do nothing, this is a pseudo-update generated due to
// setCellDrawingDependencyOffsets.
OWSAssertDebug(rowChange.changes == YapDatabaseViewChangedDependency);
} else {
hasMalformedRowChange = YES;
}
break;
}
case YapDatabaseViewChangeDelete: {
// Discard cached view items after deletes.
YapCollectionKey *collectionKey = rowChange.collectionKey;
if (collectionKey.key) {
[self.viewItemCache removeObjectForKey:collectionKey.key];
} else {
hasMalformedRowChange = YES;
}
break;
}
default:
break;
}
if (hasMalformedRowChange) {
break;
}
}
if (hasMalformedRowChange) {
// These errors seems to be very rare; they can only be reproduced
// using the more extreme actions in the debug UI.
OWSFailDebug(@"hasMalformedRowChange");
// resetMappings will call delegate.conversationViewModelDidUpdate.
[self resetMappings];
return;
}
if (![self reloadViewItems]) {
// These errors are rare.
OWSFailDebug(@"could not reload view items; hard resetting message mappings.");
// resetMappings will call delegate.conversationViewModelDidUpdate.
[self resetMappings];
return;
}
OWSLogVerbose(@"self.viewItems.count: %zd -> %zd", oldItemIdList.count, self.viewItems.count);
[self updateViewWithOldItemIdList:oldItemIdList
updatedItemSet:updatedItemSet
updatedNeighborItemSet:updatedNeighborItemSet];
}
// A simpler version of the update logic we call when
// only transient items have changed.
- (void)updateForTransientItems
{
OWSAssertIsOnMainThread();
OWSLogVerbose(@"");
NSMutableArray<NSString *> *oldItemIdList = [NSMutableArray new];
for (id<ConversationViewItem> viewItem in self.viewItems) {
[oldItemIdList addObject:viewItem.itemId];
}
NSUInteger oldViewItemCount = self.viewItems.count;
if (![self reloadViewItems]) {
// These errors are rare.
OWSFailDebug(@"could not reload view items; hard resetting message mappings.");
// resetMappings will call delegate.conversationViewModelDidUpdate.
[self resetMappings];
return;
}
OWSLogVerbose(@"self.viewItems.count: %zd -> %zd", oldViewItemCount, self.viewItems.count);
[self updateViewWitholdItemIdList:oldItemIdList
updatedItemSet:[NSSet set]
oldViewItemCount:oldViewItemCount
updatedNeighborItemSet:nil];
}
- (void)updateViewWithOldItemIdList:(NSArray<NSString *> *)oldItemIdList
updatedItemSet:(NSSet<NSString *> *)updatedItemSet
updatedNeighborItemSet:(nullable NSMutableSet<NSString *> *)updatedNeighborItemSet
{
OWSAssertDebug(oldItemIdList);
OWSAssertDebug(updatedItemSet);
if (oldItemIdList.count != [NSSet setWithArray:oldItemIdList].count) {
OWSFailDebug(@"Old view item list has duplicates.");
[self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
return;
}
NSMutableArray<NSString *> *newItemIdList = [NSMutableArray new];
NSMutableDictionary<NSString *, id<ConversationViewItem>> *newViewItemMap = [NSMutableDictionary new];
for (id<ConversationViewItem> viewItem in self.viewItems) {
[newItemIdList addObject:viewItem.itemId];
newViewItemMap[viewItem.itemId] = viewItem;
}
if (newItemIdList.count != [NSSet setWithArray:newItemIdList].count) {
OWSFailDebug(@"New view item list has duplicates.");
[self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
return;
}
NSSet<NSString *> *oldItemIdSet = [NSSet setWithArray:oldItemIdList];
NSSet<NSString *> *newItemIdSet = [NSSet setWithArray:newItemIdList];
// We use sets and dictionaries here to ensure perf.
NSMutableSet<NSString *> *deletedItemIdSet = [oldItemIdSet mutableCopy];
[deletedItemIdSet minusSet:newItemIdSet];
NSMutableSet<NSString *> *insertedItemIdSet = [newItemIdSet mutableCopy];
[insertedItemIdSet minusSet:oldItemIdSet];
NSArray<NSString *> *deletedItemIdList = [deletedItemIdSet.allObjects sortedArrayUsingSelector:@selector(compare:)];
NSArray<NSString *> *insertedItemIdList =
[insertedItemIdSet.allObjects sortedArrayUsingSelector:@selector(compare:)];
// Try to generate a series of "update items" that safely transform
// the "old item list" into the "new item list".
NSMutableArray<ConversationUpdateItem *> *updateItems = [NSMutableArray new];
NSMutableArray<NSString *> *transformedItemList = [oldItemIdList mutableCopy];
// 1. Deletes - Always perform deletes before inserts and updates.
//
// NOTE: We use reverseObjectEnumerator to ensure that items
// are deleted in reverse order, to avoid confusion around
// each deletion affecting the indices of subsequent deletions.
for (NSString *itemId in deletedItemIdList.reverseObjectEnumerator) {
OWSAssertDebug([oldItemIdSet containsObject:itemId]);
OWSAssertDebug(![newItemIdSet containsObject:itemId]);
NSUInteger oldIndex = [oldItemIdList indexOfObject:itemId];
if (oldIndex == NSNotFound) {
OWSFailDebug(@"Can't find index of deleted view item.");
return [self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
}
[updateItems addObject:[[ConversationUpdateItem alloc] initWithUpdateItemType:ConversationUpdateItemType_Delete
oldIndex:oldIndex
newIndex:NSNotFound
viewItem:nil]];
[transformedItemList removeObject:itemId];
}
// 2. Inserts - Always perform inserts before updates.
//
// NOTE: We DO NOT use reverseObjectEnumerator.
for (NSString *itemId in insertedItemIdList) {
OWSAssertDebug(![oldItemIdSet containsObject:itemId]);
OWSAssertDebug([newItemIdSet containsObject:itemId]);
NSUInteger newIndex = [newItemIdList indexOfObject:itemId];
if (newIndex == NSNotFound) {
OWSFailDebug(@"Can't find index of inserted view item.");
return [self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
}
id<ConversationViewItem> _Nullable viewItem = newViewItemMap[itemId];
if (!viewItem) {
OWSFailDebug(@"Can't find inserted view item.");
return [self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
}
[updateItems addObject:[[ConversationUpdateItem alloc] initWithUpdateItemType:ConversationUpdateItemType_Insert
oldIndex:NSNotFound
newIndex:newIndex
viewItem:viewItem]];
[transformedItemList insertObject:itemId atIndex:newIndex];
}
if (![newItemIdList isEqualToArray:transformedItemList]) {
// We should be able to represent all transformations as a series of
// inserts, updates and deletes - moves should not be necessary.
//
// TODO: The unread indicator might end up being an exception.
OWSLogWarn(@"New and updated view item lists don't match.");
return [self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
}
// 3. Updates.
//
// NOTE: Order doesn't matter.
for (NSString *itemId in updatedItemSet) {
if (![newItemIdList containsObject:itemId]) {
OWSFailDebug(@"Updated view item not in new view item list.");
continue;
}
if ([insertedItemIdList containsObject:itemId]) {
continue;
}
NSUInteger oldIndex = [oldItemIdList indexOfObject:itemId];
if (oldIndex == NSNotFound) {
OWSFailDebug(@"Can't find old index of updated view item.");
return [self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
}
NSUInteger newIndex = [newItemIdList indexOfObject:itemId];
if (newIndex == NSNotFound) {
OWSFailDebug(@"Can't find new index of updated view item.");
return [self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
}
id<ConversationViewItem> _Nullable viewItem = newViewItemMap[itemId];
if (!viewItem) {
OWSFailDebug(@"Can't find inserted view item.");
return [self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
}
[updateItems addObject:[[ConversationUpdateItem alloc] initWithUpdateItemType:ConversationUpdateItemType_Update
oldIndex:oldIndex
newIndex:newIndex
viewItem:viewItem]];
}
BOOL shouldAnimateUpdates = [self shouldAnimateUpdateItems:updateItems
oldViewItemCount:oldItemIdList.count
updatedNeighborItemSet:updatedNeighborItemSet];
return [self.delegate
conversationViewModelDidUpdate:[ConversationUpdate diffUpdateWithUpdateItems:updateItems
shouldAnimateUpdates:shouldAnimateUpdates]];
}
- (BOOL)shouldAnimateUpdateItems:(NSArray<ConversationUpdateItem *> *)updateItems
oldViewItemCount:(NSUInteger)oldViewItemCount
updatedNeighborItemSet:(nullable NSMutableSet<NSString *> *)updatedNeighborItemSet
{
OWSAssertDebug(updateItems);
// If user sends a new outgoing message, don't animate the change.
BOOL isOnlyModifyingLastMessage = YES;
for (ConversationUpdateItem *updateItem in updateItems) {
switch (updateItem.updateItemType) {
case ConversationUpdateItemType_Delete:
isOnlyModifyingLastMessage = NO;
break;
case ConversationUpdateItemType_Insert: {
id<ConversationViewItem> viewItem = updateItem.viewItem;
OWSAssertDebug(viewItem);
if (([viewItem.interaction isKindOfClass:[TSIncomingMessage class]] ||
[viewItem.interaction isKindOfClass:[TSOutgoingMessage class]])
&& updateItem.newIndex >= oldViewItemCount) {
continue;
}
isOnlyModifyingLastMessage = NO;
break;
}
case ConversationUpdateItemType_Update: {
id<ConversationViewItem> viewItem = updateItem.viewItem;
if ([updatedNeighborItemSet containsObject:viewItem.itemId]) {
continue;
}
OWSAssertDebug(viewItem);
if (([viewItem.interaction isKindOfClass:[TSIncomingMessage class]] ||
[viewItem.interaction isKindOfClass:[TSOutgoingMessage class]])
&& updateItem.newIndex >= oldViewItemCount) {
continue;
}
isOnlyModifyingLastMessage = NO;
break;
}
}
}
BOOL shouldAnimateRowUpdates = !isOnlyModifyingLastMessage;
return shouldAnimateRowUpdates;
}
- (void)createNewMessageMappings
{
if (self.thread.uniqueId.length > 0) {
self.messageMappings = [[YapDatabaseViewMappings alloc] initWithGroups:@[ self.thread.uniqueId ]
view:TSMessageDatabaseViewExtensionName];
} else {
OWSFailDebug(@"uniqueId unexpectedly empty for thread: %@", self.thread);
self.messageMappings =
[[YapDatabaseViewMappings alloc] initWithGroups:@[] view:TSMessageDatabaseViewExtensionName];
}
// Cells' appearance can depend on adjacent cells in both directions.
//
// TODO: We could do the same thing in our logic to generate "update items"
// in updateViewWithOldItemIdList.
[self.messageMappings setCellDrawingDependencyOffsets:[NSSet setWithArray:@[
@(-1),
@(+1),
]]
forGroup:self.thread.uniqueId];
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
[self.messageMappings updateWithTransaction:transaction];
}];
// We need to impose the range restrictions on the mappings immediately to avoid
// doing a great deal of unnecessary work and causing a perf hotspot.
[self updateMessageMappingRangeOptions];
}
- (void)resetMappings
{
OWSAssertDebug(self.messageMappings);
if (self.messageMappings != nil) {
// Make sure our mapping and range state is up-to-date.
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
[self.messageMappings updateWithTransaction:transaction];
}];
[self updateMessageMappingRangeOptions];
}
self.collapseCutoffDate = [NSDate new];
[self ensureDynamicInteractions];
// There appears to be a bug in YapDatabase that sometimes delays modifications
// made in another process (e.g. the SAE) from showing up in other processes.
// There's a simple workaround: a trivial write to the database flushes changes
// made from other processes.
[self.editingDatabaseConnection asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
[transaction setObject:[NSUUID UUID].UUIDString forKey:@"conversation_view_noop_mod" inCollection:@"temp"];
}];
[self.delegate conversationViewModelDidUpdate:ConversationUpdate.reloadUpdate];
}
#pragma mark - View Items
// This is a key method. It builds or rebuilds the list of
// cell view models.
//
// Returns NO on error.
- (BOOL)reloadViewItems
{
NSMutableArray<id<ConversationViewItem>> *viewItems = [NSMutableArray new];
NSMutableDictionary<NSString *, id<ConversationViewItem>> *viewItemCache = [NSMutableDictionary new];
NSUInteger count = [self.messageMappings numberOfItemsInSection:0];
BOOL isGroupThread = self.thread.isGroupThread;
ConversationStyle *conversationStyle = self.delegate.conversationStyle;
__block BOOL hasError = NO;
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
YapDatabaseViewTransaction *viewTransaction = [transaction ext:TSMessageDatabaseViewExtensionName];
OWSAssertDebug(viewTransaction);
for (NSUInteger row = 0; row < count; row++) {
TSInteraction *interaction =
[viewTransaction objectAtRow:row inSection:0 withMappings:self.messageMappings];
if (!interaction) {
OWSFailDebug(
@"missing interaction in message mappings: %lu / %lu.", (unsigned long)row, (unsigned long)count);
// TODO: Add analytics.
hasError = YES;
continue;
}
if (!interaction.uniqueId) {
OWSFailDebug(@"invalid interaction in message mappings: %lu / %lu: %@.",
(unsigned long)row,
(unsigned long)count,
interaction);
// TODO: Add analytics.
hasError = YES;
continue;
}
id<ConversationViewItem> _Nullable viewItem = self.viewItemCache[interaction.uniqueId];
if (!viewItem) {
viewItem = [[ConversationInteractionViewItem alloc] initWithInteraction:interaction
isGroupThread:isGroupThread
transaction:transaction
conversationStyle:conversationStyle];
}
[viewItems addObject:viewItem];
OWSAssertDebug(!viewItemCache[interaction.uniqueId]);
viewItemCache[interaction.uniqueId] = viewItem;
}
if (self.typingIndicatorsRecipient) {
id<ConversationViewItem> _Nullable lastViewItem = viewItems.lastObject;
uint64_t typingIndicatorTimestamp = (lastViewItem ? lastViewItem.interaction.timestamp + 1 : 1);
TSInteraction *interaction =
[[OWSTypingIndicatorInteraction alloc] initWithThread:self.thread
timestamp:typingIndicatorTimestamp
recipientId:self.typingIndicatorsRecipient];
id<ConversationViewItem> _Nullable viewItem = self.viewItemCache[interaction.uniqueId];
if (!viewItem) {
viewItem = [[ConversationInteractionViewItem alloc] initWithInteraction:interaction
isGroupThread:isGroupThread
transaction:transaction
conversationStyle:conversationStyle];
}
[viewItems addObject:viewItem];
OWSAssertDebug(!viewItemCache[interaction.uniqueId]);
viewItemCache[interaction.uniqueId] = viewItem;
}
}];
// Flag to ensure that we only increment once per launch.
if (hasError) {
OWSLogWarn(@"incrementing version of: %@", TSMessageDatabaseViewExtensionName);
[OWSPrimaryStorage incrementVersionOfDatabaseExtension:TSMessageDatabaseViewExtensionName];
}
// Update the "break" properties (shouldShowDate and unreadIndicator) of the view items.
BOOL shouldShowDateOnNextViewItem = YES;
uint64_t previousViewItemTimestamp = 0;
OWSUnreadIndicator *_Nullable unreadIndicator = self.dynamicInteractions.unreadIndicator;
uint64_t collapseCutoffTimestamp = [NSDate ows_millisecondsSince1970ForDate:self.collapseCutoffDate];
BOOL hasPlacedUnreadIndicator = NO;
for (id<ConversationViewItem> viewItem in viewItems) {
BOOL canShowDate = NO;
switch (viewItem.interaction.interactionType) {
case OWSInteractionType_Unknown:
case OWSInteractionType_Offer:
case OWSInteractionType_TypingIndicator:
canShowDate = NO;
break;
case OWSInteractionType_IncomingMessage:
case OWSInteractionType_OutgoingMessage:
case OWSInteractionType_Error:
case OWSInteractionType_Info:
case OWSInteractionType_Call:
canShowDate = YES;
break;
}
uint64_t viewItemTimestamp = viewItem.interaction.timestampForSorting;
OWSAssertDebug(viewItemTimestamp > 0);
BOOL shouldShowDate = NO;
if (previousViewItemTimestamp == 0) {
shouldShowDateOnNextViewItem = YES;
} else if (![DateUtil isSameDayWithTimestamp:previousViewItemTimestamp timestamp:viewItemTimestamp]) {
shouldShowDateOnNextViewItem = YES;
}
if (shouldShowDateOnNextViewItem && canShowDate) {
shouldShowDate = YES;
shouldShowDateOnNextViewItem = NO;
}
viewItem.shouldShowDate = shouldShowDate;
previousViewItemTimestamp = viewItemTimestamp;
// When a conversation without unread messages receives an incoming message,
// we call ensureDynamicInteractions to ensure that the unread indicator (etc.)
// state is updated accordingly. However this is done in a separate transaction.
// We don't want to show the incoming message _without_ an unread indicator and
// then immediately re-render it _with_ an unread indicator.
//
// To avoid this, we use a temporary instance of OWSUnreadIndicator whenever
// we find an unread message that _should_ have an unread indicator, but no
// unread indicator exists yet on dynamicInteractions.
BOOL isItemUnread = ([viewItem.interaction conformsToProtocol:@protocol(OWSReadTracking)]
&& !((id<OWSReadTracking>)viewItem.interaction).wasRead);
if (isItemUnread && !unreadIndicator && !hasPlacedUnreadIndicator && !self.hasClearedUnreadMessagesIndicator) {
unreadIndicator =
[[OWSUnreadIndicator alloc] initUnreadIndicatorWithTimestamp:viewItem.interaction.timestamp
hasMoreUnseenMessages:NO
missingUnseenSafetyNumberChangeCount:0
unreadIndicatorPosition:0
firstUnseenInteractionTimestamp:viewItem.interaction.timestamp];
}
// Place the unread indicator onto the first appropriate view item,
// if any.
if (unreadIndicator && viewItem.interaction.timestampForSorting >= unreadIndicator.timestamp) {
viewItem.unreadIndicator = unreadIndicator;
unreadIndicator = nil;
hasPlacedUnreadIndicator = YES;
} else {
viewItem.unreadIndicator = nil;
}
}
if (unreadIndicator) {
// This isn't necessarily a bug - all of the interactions after the
// unread indicator may have disappeared or been deleted.
OWSLogWarn(@"Couldn't find an interaction to hang the unread indicator on.");
}
// Update the properties of the view items.
//
// NOTE: This logic uses the break properties which are set in the previous pass.
for (NSUInteger i = 0; i < viewItems.count; i++) {
id<ConversationViewItem> viewItem = viewItems[i];
id<ConversationViewItem> _Nullable previousViewItem = (i > 0 ? viewItems[i - 1] : nil);
id<ConversationViewItem> _Nullable nextViewItem = (i + 1 < viewItems.count ? viewItems[i + 1] : nil);
BOOL shouldShowSenderAvatar = NO;
BOOL shouldHideFooter = NO;
BOOL isFirstInCluster = YES;
BOOL isLastInCluster = YES;
NSAttributedString *_Nullable senderName = nil;
OWSInteractionType interactionType = viewItem.interaction.interactionType;
NSString *timestampText = [DateUtil formatTimestampShort:viewItem.interaction.timestamp];
if (interactionType == OWSInteractionType_OutgoingMessage) {
TSOutgoingMessage *outgoingMessage = (TSOutgoingMessage *)viewItem.interaction;
MessageReceiptStatus receiptStatus =
[MessageRecipientStatusUtils recipientStatusWithOutgoingMessage:outgoingMessage];
BOOL isDisappearingMessage = outgoingMessage.isExpiringMessage;
if (nextViewItem && nextViewItem.interaction.interactionType == interactionType) {
TSOutgoingMessage *nextOutgoingMessage = (TSOutgoingMessage *)nextViewItem.interaction;
MessageReceiptStatus nextReceiptStatus =
[MessageRecipientStatusUtils recipientStatusWithOutgoingMessage:nextOutgoingMessage];
NSString *nextTimestampText = [DateUtil formatTimestampShort:nextViewItem.interaction.timestamp];
// We can skip the "outgoing message status" footer if the next message
// has the same footer and no "date break" separates us...
// ...but always show "failed to send" status
// ...and always show the "disappearing messages" animation.
shouldHideFooter
= ([timestampText isEqualToString:nextTimestampText] && receiptStatus == nextReceiptStatus
&& outgoingMessage.messageState != TSOutgoingMessageStateFailed
&& outgoingMessage.messageState != TSOutgoingMessageStateSending && !nextViewItem.hasCellHeader
&& !isDisappearingMessage);
}
// clustering
if (previousViewItem == nil) {
isFirstInCluster = YES;
} else if (viewItem.hasCellHeader) {
isFirstInCluster = YES;
} else {
isFirstInCluster = previousViewItem.interaction.interactionType != OWSInteractionType_OutgoingMessage;
}
if (nextViewItem == nil) {
isLastInCluster = YES;
} else if (nextViewItem.hasCellHeader) {
isLastInCluster = YES;
} else {
isLastInCluster = nextViewItem.interaction.interactionType != OWSInteractionType_OutgoingMessage;
}
} else if (interactionType == OWSInteractionType_IncomingMessage) {
TSIncomingMessage *incomingMessage = (TSIncomingMessage *)viewItem.interaction;
NSString *incomingSenderId = incomingMessage.authorId;
OWSAssertDebug(incomingSenderId.length > 0);
BOOL isDisappearingMessage = incomingMessage.isExpiringMessage;
NSString *_Nullable nextIncomingSenderId = nil;
if (nextViewItem && nextViewItem.interaction.interactionType == interactionType) {
TSIncomingMessage *nextIncomingMessage = (TSIncomingMessage *)nextViewItem.interaction;
nextIncomingSenderId = nextIncomingMessage.authorId;
OWSAssertDebug(nextIncomingSenderId.length > 0);
}
if (nextViewItem && nextViewItem.interaction.interactionType == interactionType) {
NSString *nextTimestampText = [DateUtil formatTimestampShort:nextViewItem.interaction.timestamp];
// We can skip the "incoming message status" footer in a cluster if the next message
// has the same footer and no "date break" separates us.
// ...but always show the "disappearing messages" animation.
shouldHideFooter = ([timestampText isEqualToString:nextTimestampText] && !nextViewItem.hasCellHeader &&
[NSObject isNullableObject:nextIncomingSenderId equalTo:incomingSenderId]
&& !isDisappearingMessage);
}
// clustering
if (previousViewItem == nil) {
isFirstInCluster = YES;
} else if (viewItem.hasCellHeader) {
isFirstInCluster = YES;
} else if (previousViewItem.interaction.interactionType != OWSInteractionType_IncomingMessage) {
isFirstInCluster = YES;
} else {
TSIncomingMessage *previousIncomingMessage = (TSIncomingMessage *)previousViewItem.interaction;
isFirstInCluster = ![incomingSenderId isEqual:previousIncomingMessage.authorId];
}
if (nextViewItem == nil) {
isLastInCluster = YES;
} else if (nextViewItem.interaction.interactionType != OWSInteractionType_IncomingMessage) {
isLastInCluster = YES;
} else if (nextViewItem.hasCellHeader) {
isLastInCluster = YES;
} else {
TSIncomingMessage *nextIncomingMessage = (TSIncomingMessage *)nextViewItem.interaction;
isLastInCluster = ![incomingSenderId isEqual:nextIncomingMessage.authorId];
}
if (viewItem.isGroupThread) {
// Show the sender name for incoming group messages unless
// the previous message has the same sender name and
// no "date break" separates us.
BOOL shouldShowSenderName = YES;
if (previousViewItem && previousViewItem.interaction.interactionType == interactionType) {
TSIncomingMessage *previousIncomingMessage = (TSIncomingMessage *)previousViewItem.interaction;
NSString *previousIncomingSenderId = previousIncomingMessage.authorId;
OWSAssertDebug(previousIncomingSenderId.length > 0);
shouldShowSenderName
= (![NSObject isNullableObject:previousIncomingSenderId equalTo:incomingSenderId]
|| viewItem.hasCellHeader);
}
if (shouldShowSenderName) {
senderName = [self.contactsManager
attributedContactOrProfileNameForPhoneIdentifier:incomingSenderId
primaryAttributes:[OWSMessageBubbleView
senderNamePrimaryAttributes]
secondaryAttributes:[OWSMessageBubbleView
senderNameSecondaryAttributes]];
}
// Show the sender avatar for incoming group messages unless
// the next message has the same sender avatar and
// no "date break" separates us.
shouldShowSenderAvatar = YES;
if (nextViewItem && nextViewItem.interaction.interactionType == interactionType) {
shouldShowSenderAvatar = (![NSObject isNullableObject:nextIncomingSenderId equalTo:incomingSenderId]
|| nextViewItem.hasCellHeader);
}
}
}
if (viewItem.interaction.timestampForSorting > collapseCutoffTimestamp) {
shouldHideFooter = NO;
}
viewItem.isFirstInCluster = isFirstInCluster;
viewItem.isLastInCluster = isLastInCluster;
viewItem.shouldShowSenderAvatar = shouldShowSenderAvatar;
viewItem.shouldHideFooter = shouldHideFooter;
viewItem.senderName = senderName;
}
self.viewItems = viewItems;
self.viewItemCache = viewItemCache;
return !hasError;
}
// Whenever an interaction is modified, we need to reload it from the DB
// and update the corresponding view item.
- (void)reloadInteractionForViewItem:(id<ConversationViewItem>)viewItem
{
OWSAssertIsOnMainThread();
OWSAssertDebug(viewItem);
// This should never happen, but don't crash in production if we have a bug.
if (!viewItem) {
return;
}
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
TSInteraction *_Nullable interaction =
[TSInteraction fetchObjectWithUniqueID:viewItem.interaction.uniqueId transaction:transaction];
if (!interaction) {
OWSFailDebug(@"could not reload interaction");
} else {
[viewItem replaceInteraction:interaction transaction:transaction];
}
}];
}
- (nullable NSIndexPath *)ensureLoadWindowContainsQuotedReply:(OWSQuotedReplyModel *)quotedReply
{
OWSAssertIsOnMainThread();
OWSAssertDebug(quotedReply);
OWSAssertDebug(quotedReply.timestamp > 0);
OWSAssertDebug(quotedReply.authorId.length > 0);
// TODO:
// We try to find the index of the item within the current thread's
// interactions that includes the "quoted interaction".
//
// NOTE: There are two indices:
//
// * The "group index" of the member of the database views group at
// the db conneciton's current checkpoint.
// * The "index row/section" in the message mapping.
//
// NOTE: Since the range _IS NOT_ filtered by author,
// and timestamp collisions are possible, it's possible
// for:
//
// * The range to include more than the "quoted interaction".
// * The range to be non-empty but NOT include the "quoted interaction",
// although this would be a bug.
__block TSInteraction *_Nullable quotedInteraction;
__block NSUInteger threadInteractionCount = 0;
__block NSNumber *_Nullable groupIndex = nil;
if (quotedReply.isRemotelySourced) {
return nil;
}
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
quotedInteraction = [ThreadUtil findInteractionInThreadByTimestamp:quotedReply.timestamp
authorId:quotedReply.authorId
threadUniqueId:self.thread.uniqueId
transaction:transaction];
if (!quotedInteraction) {
return;
}
YapDatabaseAutoViewTransaction *_Nullable extension =
[transaction extension:TSMessageDatabaseViewExtensionName];
if (!extension) {
OWSFailDebug(@"Couldn't load view.");
return;
}
threadInteractionCount = [extension numberOfItemsInGroup:self.thread.uniqueId];
groupIndex = [self findGroupIndexOfThreadInteraction:quotedInteraction transaction:transaction];
}];
if (!quotedInteraction || !groupIndex) {
return nil;
}
NSUInteger indexRow = 0;
NSUInteger indexSection = 0;
BOOL isInMappings = [self.messageMappings getRow:&indexRow
section:&indexSection
forIndex:groupIndex.unsignedIntegerValue
inGroup:self.thread.uniqueId];
if (!isInMappings) {
NSInteger desiredWindowSize = MAX(0, 1 + (NSInteger)threadInteractionCount - groupIndex.integerValue);
NSUInteger oldLoadWindowSize = [self.messageMappings numberOfItemsInGroup:self.thread.uniqueId];
NSInteger additionalItemsToLoad = MAX(0, desiredWindowSize - (NSInteger)oldLoadWindowSize);
if (additionalItemsToLoad < 1) {
OWSLogError(@"Couldn't determine how to load quoted reply.");
return nil;
}
// Try to load more messages so that the quoted message
// is in the load window.
//
// This may fail if the quoted message is very old, in which
// case we'll load the max number of messages.
[self loadNMoreMessages:(NSUInteger)additionalItemsToLoad];
// `loadNMoreMessages` will reset the mapping and possibly
// integrate new changes, so we need to reload the "group index"
// of the quoted message.
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
groupIndex = [self findGroupIndexOfThreadInteraction:quotedInteraction transaction:transaction];
}];
if (!quotedInteraction || !groupIndex) {
OWSLogError(@"Failed to find quoted reply in group.");
return nil;
}
isInMappings = [self.messageMappings getRow:&indexRow
section:&indexSection
forIndex:groupIndex.unsignedIntegerValue
inGroup:self.thread.uniqueId];
if (!isInMappings) {
OWSLogError(@"Could not load quoted reply into mapping.");
return nil;
}
}
// The mapping indices and view item indices don't always align for corrupt mappings.
__block TSInteraction *_Nullable interaction;
[self.uiDatabaseConnection readWithBlock:^(YapDatabaseReadTransaction *transaction) {
YapDatabaseViewTransaction *viewTransaction = [transaction ext:TSMessageDatabaseViewExtensionName];
OWSAssertDebug(viewTransaction);
interaction = [viewTransaction objectAtRow:indexRow inSection:indexSection withMappings:self.messageMappings];
}];
if (!interaction) {
OWSFailDebug(@"Could not locate interaction for quoted reply.");
return nil;
}
id<ConversationViewItem> _Nullable viewItem = self.viewItemCache[interaction.uniqueId];
if (!viewItem) {
OWSFailDebug(@"Could not locate view item for quoted reply.");
return nil;
}
NSUInteger viewItemIndex = [self.viewItems indexOfObject:viewItem];
if (viewItemIndex == NSNotFound) {
OWSFailDebug(@"Could not locate view item index for quoted reply.");
return nil;
}
return [NSIndexPath indexPathForRow:(NSInteger)viewItemIndex inSection:0];
}
- (nullable NSNumber *)findGroupIndexOfThreadInteraction:(TSInteraction *)interaction
transaction:(YapDatabaseReadTransaction *)transaction
{
OWSAssertDebug(interaction);
OWSAssertDebug(transaction);
YapDatabaseAutoViewTransaction *_Nullable extension = [transaction extension:TSMessageDatabaseViewExtensionName];
if (!extension) {
OWSFailDebug(@"Couldn't load view.");
return nil;
}
NSUInteger groupIndex = 0;
BOOL foundInGroup =
[extension getGroup:nil index:&groupIndex forKey:interaction.uniqueId inCollection:TSInteraction.collection];
if (!foundInGroup) {
OWSLogError(@"Couldn't find quoted message in group.");
return nil;
}
return @(groupIndex);
}
- (void)typingIndicatorStateDidChange:(NSNotification *)notification
{
OWSAssertIsOnMainThread();
self.typingIndicatorsRecipient = [self.typingIndicators typingIndicatorsForThread:self.thread];
}
- (void)setTypingIndicatorsRecipient:(nullable NSString *)typingIndicatorsRecipient
{
OWSAssertIsOnMainThread();
BOOL didChange = ![NSObject isNullableObject:typingIndicatorsRecipient equalTo:_typingIndicatorsRecipient];
_typingIndicatorsRecipient = typingIndicatorsRecipient;
// Update the view items if necessary.
// We don't have to do this if they haven't been configured yet.
if (didChange && self.viewItems != nil) {
[self updateForTransientItems];
}
}
@end
NS_ASSUME_NONNULL_END