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SKConversation.m
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SKConversation.m
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//
// SKConversation.m
// SnapchatKit
//
// Created by Tanner on 5/19/15.
// Copyright (c) 2015 Tanner Bennett. All rights reserved.
//
#import "SKConversation.h"
#import "SKSnap.h"
#import "SKMessage.h"
#import "SKCashTransaction.h"
#import "SKClient.h"
SKChatType SKChatTypeFromString(NSString *chatTypeString) {
if ([chatTypeString isEqualToString:@"text"])
return SKChatTypeText;
if ([chatTypeString isEqualToString:@"media"])
return SKChatTypeMedia;
return SKChatTypeNever;
}
@implementation SKConversation
- (id)initWithDictionary:(NSDictionary *)json {
NSParameterAssert(json.allKeys.count > 2);
// Required keys: conversation_messages, conversation_state, id
self = [super initWithDictionary:json];
NSDictionary *convoMessages = json[@"conversation_messages"];
NSDictionary *lastChatActions = json[@"last_chat_actions"];
NSDictionary *lastTransaction = json[@"last_cash_transaction"];
NSArray *pendingRecievedSnaps = json[@"pending_received_snaps"];
NSArray *messages = convoMessages[@"messages"];
NSDictionary *lastSnap = json[@"last_snap"];
CGFloat lastInteraction = [json[@"last_interaction_ts"] doubleValue];
if (self) {
_messagingAuth = convoMessages[@"messaging_auth"];
_state = json[@"conversation_state"];
_identifier = json[@"id"];
_pagination = json[@"iter_token"];
_lastSnap = lastSnap ? [[SKSnap alloc] initWithDictionary:lastSnap] : nil;
_lastTransaction = lastTransaction ? [[SKCashTransaction alloc] initWithDictionary:lastTransaction] : nil;
_lastInteraction = lastInteraction > 0 ? [NSDate dateWithTimeIntervalSince1970:lastInteraction/1000] : nil;
if (lastChatActions) {
_lastChatType = SKChatTypeFromString(lastChatActions[@"last_write_type"]);
_lastChatRead = [NSDate dateWithTimeIntervalSince1970:[lastChatActions[@"last_read_timestamp"] doubleValue]/1000];
_lastChatWrite = [NSDate dateWithTimeIntervalSince1970:[lastChatActions[@"last_write_timestamp"] doubleValue]/1000];
_lastChatReader = lastChatActions[@"last_reader"];
_lastChatWriter = lastChatActions[@"last_writer"];
}
_participants = json[@"participants"] ?: [_identifier componentsSeparatedByString:@"~"];
_usersWithPendingChats = json[@"pending_chats_for"] ?: @[];
// Messages
NSMutableOrderedSet *temp = [NSMutableOrderedSet orderedSet];
for (NSDictionary *message in messages) {
if (message[@"snap"])
[temp addObject:[[SKSnap alloc] initWithDictionary:message[@"snap"]]];
else if (message[@"chat_message"])
[temp addObject:[[SKMessage alloc] initWithDictionary:message]];
else if (message[@"cash_transaction"])
[temp addObject:[[SKCashTransaction alloc] initWithDictionary:message]];
else
SKLog(@"Unhandled conversation message type:\n%@", message);
}
_messages = temp;
// Pending recieved snaps
NSMutableArray *tmp = [NSMutableArray new];
for (NSDictionary *snap in pendingRecievedSnaps)
[tmp addObject:[[SKSnap alloc] initWithDictionary:snap]];
_pendingRecievedSnaps = tmp;
}
[[self class] addKnownJSONKeys:@[@"conversation_messages", @"last_chat_actions", @"pending_received_snaps", @"conversation_state", @"id",
@"iter_token", @"last_snap", @"last_cash_transaction", @"last_interaction_ts", @"participants", @"pending_chats_for"]];
return self;
}
- (NSString *)description {
NSUInteger c = self.participants.count;
NSString *participants = c == 0 ? @"{n/a}" : c == 1 ? self.participants[0] : [NSString stringWithFormat:@"%@ and %@", self.participants[0], self.participants[1]];
return [NSString stringWithFormat:@"<%@ participants: %@, messages=%lu, unread=%lu>",
NSStringFromClass(self.class), participants, (unsigned long)self.messages.count, (unsigned long)self.pendingRecievedSnaps.count];
}
- (NSArray *)unreadChatsForParticipant:(NSString *)participant {
NSParameterAssert([self.participants containsObject:participant]);
if (![self.usersWithPendingChats containsObject:participant])
return @[];
NSMutableArray *unread = [NSMutableArray new];
NSMutableArray *others = self.participants.mutableCopy;
[others removeObject:participant];
// Iterate over other participants, excluding "participant"
for (NSString *user in others) {
NSUInteger seenByParticipant = [self.state[@"user_chat_releases"][participant][user] integerValue];
NSUInteger sentByUser = [self.state[@"user_sequences"][user] integerValue];
NSInteger totalUnread = sentByUser - seenByParticipant;
// Possible unhandled cases
if (totalUnread == 0) {
SKLog(@"0 unread count, but [%@] has pending chats from %@.", participant, user);
break;
}
if (totalUnread < 0) {
SKLog(@"Negative unread count between users: [%@] and %@.", participant, user);
break;
}
__block NSUInteger found = 0;
[self.messages enumerateObjectsUsingBlock:^(SKThing *thing, NSUInteger i, BOOL *stop) {
// Ignore snaps
if ([thing isKindOfClass:[SKSnap class]])
return;
// Check if message was sent to participant,
// increment found count
SKMessage *message = (SKMessage *)thing;
if ([message.recipients containsObject:participant]) {
[unread addObject:message];
found++;
if (found == totalUnread)
*stop = YES;
}
}];
}
return unread;
}
- (void)addMessagesFromConversation:(SKConversation *)conversation {
if (!conversation.messages.count) return;
// Internally, this set is mutable.
NSMutableOrderedSet *mutableMessages = (NSMutableOrderedSet *)self.messages;
[mutableMessages addObjectsFromArray:conversation.messages.array];
}
- (BOOL)isEqual:(id)object {
if ([object isKindOfClass:[SKConversation class]])
return [self isEqualToConversation:object];
return [super isEqual:object];
}
- (BOOL)isEqualToConversation:(SKConversation *)conversation {
return [self.identifier isEqualToString:conversation.identifier];
}
@end
@implementation SKConversation (SKClient)
- (NSString *)recipient {
if (![SKClient sharedClient].username.length) return nil;
return [self.participants[0] isEqualToString:[SKClient sharedClient].username] ? self.participants[1] : self.participants[0];
}
- (NSString *)conversationString {
NSString *username = [SKClient sharedClient].username;
NSString *other = self.recipient;
NSUInteger minlen = MAX(username.length, other.length) + 1;
NSMutableString *string = [NSMutableString string];
for (SKThing *thing in self.messages.reverseObjectEnumerator) {
if ([thing isKindOfClass:[SKSnap class]]) {
SKSnap *snap = (SKSnap *)thing;
NSString *sender = [NSString stringWithFormat:@"%@:", snap.sender ?: username];
sender = [sender stringByPaddingToLength:minlen withString:@" " startingAtIndex:0];
[string appendFormat:@"%@ %@", sender, SKStringFromMediaKind(snap.mediaKind)];
} else if ([thing isKindOfClass:[SKMessage class]]) {
SKMessage *message = (SKMessage *)thing;
NSString *sender = [NSString stringWithFormat:@"%@:", message.sender];
sender = [sender stringByPaddingToLength:minlen withString:@" " startingAtIndex:0];
[string appendFormat:@"%@ %@", sender, message.text ?: @"SKMessageKindMedia"];
} else if ([thing isKindOfClass:[SKCashTransaction class]]) {
SKCashTransaction *transaction = (SKCashTransaction *)thing;
NSString *sender = [NSString stringWithFormat:@"%@:", transaction.sender];
sender = [sender stringByPaddingToLength:minlen withString:@" " startingAtIndex:0];
[string appendFormat:@"%@ %@", sender, transaction.message];
}
[string appendString:@"\n"];
}
return string;
}
@end