send: must be performed on main queue

Just need to append ?preview=1 to attachment fetch operation.

Dumped Classes/IMCore_ClassDump.h

@@ -3680,6 +3680,16 @@ __attribute__((visibility("default"))) @interface IMService : NSObject { }
 
 @end
 
+typedef NS_ENUM(NSInteger, IMMessageDescriptionType) {
+    IMMessageDescriptionAccessibility,
+    IMMessageDescriptionAcknowledgement,
+    IMMessageDescriptionConversationList,
+    IMMessageDescriptionNotification,
+    IMMessageDescriptionSiri,
+    IMMessageDescriptionSPI,
+};
+
+
 @interface IMMessage : NSObject <NSCopying>
 {
     IMHandle *_sender;
@@ -3804,8 +3814,8 @@ __attribute__((visibility("default"))) @interface IMService : NSObject { }
 - (id)_initWithSender:(id)arg1 time:(id)arg2 timeRead:(id)arg3 timeDelivered:(id)arg4 timePlayed:(id)arg5 plainText:(id)arg6 text:(id)arg7 messageSubject:(id)arg8 fileTransferGUIDs:(id)arg9 flags:(unsigned long long)arg10 error:(id)arg11 guid:(id)arg12 messageID:(long long)arg13 subject:(id)arg14 balloonBundleID:(id)arg15 payloadData:(id)arg16 expressiveSendStyleID:(id)arg17 timeExpressiveSendPlayed:(id)arg18 associatedMessageGUID:(id)arg19 associatedMessageType:(long long)arg20 associatedMessageRange:(struct _NSRange)arg21 messageSummaryInfo:(id)arg22;
 - (id)_copyWithFlags:(unsigned long long)arg1;
 - (id)copyWithZone:(struct _NSZone *)arg1;
-- (id)descriptionForPurpose:(long long)arg1 inChat:(id)arg2;
+- (id)descriptionForPurpose:(IMMessageDescriptionType)arg1 inChat:(id)arg2;
-- (id)descriptionForPurpose:(long long)arg1;
+- (id)descriptionForPurpose:(IMMessageDescriptionType)arg1;
 - (void)_ovverrideGUIDForTest:(id)arg1;
 @property(readonly, nonatomic) BOOL isAssociatedMessage;
 - (id)initWithSender:(id)arg1 time:(id)arg2 text:(id)arg3 messageSubject:(id)arg4 fileTransferGUIDs:(id)arg5 flags:(unsigned long long)arg6 error:(id)arg7 guid:(id)arg8 subject:(id)arg9 associatedMessageGUID:(id)arg10 associatedMessageType:(long long)arg11 associatedMessageRange:(struct _NSRange)arg12 associatedMessageInfo:(id)arg13;

Dumped Classes/IMSharedUtilities_ClassDump.h

@@ -18,12 +18,18 @@ struct IMFileLocation_t {
     int _field5;
 };
 
-struct IMPreviewConstraints {
+typedef struct IMPreviewConstraints {
-    double _field1;
+    CGFloat maxPxWidth;
-    struct CGSize _field2;
+    CGSize minThumbnailPxSize;
-    double _field3;
+    CGFloat scale;
-    char _field4;
+    BOOL isSticker;
-};
+    BOOL generateMetadata;
+} IMPreviewConstraints;
+
+extern IMPreviewConstraints IMPreviewConstraintsFromDictionary(NSDictionary *dictionary);
+extern NSDictionary *IMPreviewConstraintsDictionaryFromConstraint(IMPreviewConstraints constraint);
+extern BOOL IMPreviewConstraintsEqualToConstraints(IMPreviewConstraints constraints1, IMPreviewConstraints constraints2);
+extern IMPreviewConstraints IMPreviewConstraintsZero(void);
 
 struct _TidyDoc {
     int _field1;
@@ -155,6 +161,8 @@ struct __va_list_tag {
 - (void)setObject:(id)arg1 forKey:(id)arg2;
 @end
 
+extern NSURL* IMAttachmentPreviewFileURL(NSURL *attachmentURL, NSString *extension, BOOL generateIntermediaryDirectories);
+
 @protocol IMPreviewGeneratorProtocol
 + (BOOL)shouldShadePreview;
 + (BOOL)shouldScaleUpPreview;

MessagesBridge.xcodeproj/project.pbxproj

@@ -73,8 +73,13 @@
 		CD14F1A4219FF22700E7DD22 /* IMMessageItem+Encoded.m in Sources */ = {isa = PBXBuildFile; fileRef = CD14F1A3219FF22700E7DD22 /* IMMessageItem+Encoded.m */; };
 		CD14F1AA219FF3B800E7DD22 /* MBIMUpdateQueue.m in Sources */ = {isa = PBXBuildFile; fileRef = CD14F1A9219FF3B800E7DD22 /* MBIMUpdateQueue.m */; };
 		CD14F1AD219FFAE100E7DD22 /* MBIMConcurrentHTTPServer.m in Sources */ = {isa = PBXBuildFile; fileRef = CD14F1AC219FFAE100E7DD22 /* MBIMConcurrentHTTPServer.m */; };
+		CD2782BC29527FE500C0C030 /* IMSharedUtilities.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CD2782BB29527FE500C0C030 /* IMSharedUtilities.framework */; };
+		CD2782BF2952832B00C0C030 /* MBIMImageUtils.m in Sources */ = {isa = PBXBuildFile; fileRef = CD2782BE2952832B00C0C030 /* MBIMImageUtils.m */; };
+		CD2782FE2952875F00C0C030 /* CoreGraphics.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CD2782FD2952875F00C0C030 /* CoreGraphics.framework */; };
+		CD2783002952876700C0C030 /* ImageIO.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CD2782FF2952876700C0C030 /* ImageIO.framework */; };
 		CD2ECEC2269539100055E302 /* MBIMAuthenticateOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = CD2ECEC1269539100055E302 /* MBIMAuthenticateOperation.m */; };
 		CD2ECEC526953F2A0055E302 /* MBIMAuthToken.m in Sources */ = {isa = PBXBuildFile; fileRef = CD2ECEC426953F2A0055E302 /* MBIMAuthToken.m */; };
+		CD3F62B1297769F2004305D9 /* MBIMURLUtilities.m in Sources */ = {isa = PBXBuildFile; fileRef = CD3F62B0297769F2004305D9 /* MBIMURLUtilities.m */; };
 		CD602056219B5DFD0024D9C5 /* MBIMBridgeOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = CD602055219B5DFD0024D9C5 /* MBIMBridgeOperation.m */; };
 		CD60205C219B623F0024D9C5 /* MBIMMessagesListOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = CD60205B219B623F0024D9C5 /* MBIMMessagesListOperation.m */; };
 		CD60205F219B674B0024D9C5 /* MBIMConversationListOperation.m in Sources */ = {isa = PBXBuildFile; fileRef = CD60205E219B674B0024D9C5 /* MBIMConversationListOperation.m */; };
@@ -223,10 +228,17 @@
 		CD14F1A9219FF3B800E7DD22 /* MBIMUpdateQueue.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MBIMUpdateQueue.m; sourceTree = "<group>"; };
 		CD14F1AB219FFAE100E7DD22 /* MBIMConcurrentHTTPServer.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MBIMConcurrentHTTPServer.h; sourceTree = "<group>"; };
 		CD14F1AC219FFAE100E7DD22 /* MBIMConcurrentHTTPServer.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MBIMConcurrentHTTPServer.m; sourceTree = "<group>"; };
+		CD2782BB29527FE500C0C030 /* IMSharedUtilities.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = IMSharedUtilities.framework; path = Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.0.Internal.sdk/System/Library/PrivateFrameworks/IMSharedUtilities.framework; sourceTree = DEVELOPER_DIR; };
+		CD2782BD2952832B00C0C030 /* MBIMImageUtils.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MBIMImageUtils.h; sourceTree = "<group>"; };
+		CD2782BE2952832B00C0C030 /* MBIMImageUtils.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MBIMImageUtils.m; sourceTree = "<group>"; };
+		CD2782FD2952875F00C0C030 /* CoreGraphics.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreGraphics.framework; path = System/Library/Frameworks/CoreGraphics.framework; sourceTree = SDKROOT; };
+		CD2782FF2952876700C0C030 /* ImageIO.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = ImageIO.framework; path = System/Library/Frameworks/ImageIO.framework; sourceTree = SDKROOT; };
 		CD2ECEC0269539100055E302 /* MBIMAuthenticateOperation.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MBIMAuthenticateOperation.h; sourceTree = "<group>"; };
 		CD2ECEC1269539100055E302 /* MBIMAuthenticateOperation.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MBIMAuthenticateOperation.m; sourceTree = "<group>"; };
 		CD2ECEC326953F2A0055E302 /* MBIMAuthToken.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MBIMAuthToken.h; sourceTree = "<group>"; };
 		CD2ECEC426953F2A0055E302 /* MBIMAuthToken.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MBIMAuthToken.m; sourceTree = "<group>"; };
+		CD3F62AF297769F2004305D9 /* MBIMURLUtilities.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MBIMURLUtilities.h; sourceTree = "<group>"; };
+		CD3F62B0297769F2004305D9 /* MBIMURLUtilities.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MBIMURLUtilities.m; sourceTree = "<group>"; };
 		CD602054219B5DFD0024D9C5 /* MBIMBridgeOperation.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MBIMBridgeOperation.h; sourceTree = "<group>"; };
 		CD602055219B5DFD0024D9C5 /* MBIMBridgeOperation.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MBIMBridgeOperation.m; sourceTree = "<group>"; };
 		CD60205A219B623F0024D9C5 /* MBIMMessagesListOperation.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MBIMMessagesListOperation.h; sourceTree = "<group>"; };
@@ -287,8 +299,11 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				CD2782BC29527FE500C0C030 /* IMSharedUtilities.framework in Frameworks */,
 				1A257CCB23A8681200A4A2C8 /* Security.framework in Frameworks */,
+				CD2783002952876700C0C030 /* ImageIO.framework in Frameworks */,
 				1ACFCFDF219EB31400E2C237 /* CocoaHTTPServer.framework in Frameworks */,
+				CD2782FE2952875F00C0C030 /* CoreGraphics.framework in Frameworks */,
 				1A257CC923A867EF00A4A2C8 /* IMCore.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -334,6 +349,9 @@
 		1A0C445E219A45B400F2AC00 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				CD2782FF2952876700C0C030 /* ImageIO.framework */,
+				CD2782FD2952875F00C0C030 /* CoreGraphics.framework */,
+				CD2782BB29527FE500C0C030 /* IMSharedUtilities.framework */,
 				1A257CCA23A8681200A4A2C8 /* Security.framework */,
 				1A257CC823A867EF00A4A2C8 /* IMCore.framework */,
 			);
@@ -370,6 +388,10 @@
 				CD936A31289B353F0093A1AC /* MBIMErrorResponse.m */,
 				1AA43E93219EC38E00EDF1A7 /* MBIMHTTPUtilities.h */,
 				1AA43E94219EC38E00EDF1A7 /* MBIMHTTPUtilities.m */,
+				CD2782BD2952832B00C0C030 /* MBIMImageUtils.h */,
+				CD2782BE2952832B00C0C030 /* MBIMImageUtils.m */,
+				CD3F62AF297769F2004305D9 /* MBIMURLUtilities.h */,
+				CD3F62B0297769F2004305D9 /* MBIMURLUtilities.m */,
 			);
 			path = Utilities;
 			sourceTree = "<group>";
@@ -883,6 +905,7 @@
 				CDF62335219A895D00690038 /* main.m in Sources */,
 				CD60205C219B623F0024D9C5 /* MBIMMessagesListOperation.m in Sources */,
 				CD14F1AA219FF3B800E7DD22 /* MBIMUpdateQueue.m in Sources */,
+				CD3F62B1297769F2004305D9 /* MBIMURLUtilities.m in Sources */,
 				CD14F1A4219FF22700E7DD22 /* IMMessageItem+Encoded.m in Sources */,
 				CD602062219B68950024D9C5 /* MBIMSendMessageOperation.m in Sources */,
 				CD14F1A1219FE7D600E7DD22 /* MBIMUpdatePollOperation.m in Sources */,
@@ -893,6 +916,7 @@
 				CD602056219B5DFD0024D9C5 /* MBIMBridgeOperation.m in Sources */,
 				CD60205F219B674B0024D9C5 /* MBIMConversationListOperation.m in Sources */,
 				CDE4556421A3578A0041F5DD /* IMChat+Encoded.m in Sources */,
+				CD2782BF2952832B00C0C030 /* MBIMImageUtils.m in Sources */,
 				1AA43E8F219EBB2D00EDF1A7 /* MBIMJSONDataResponse.m in Sources */,
 				CD936A32289B353F0093A1AC /* MBIMErrorResponse.m in Sources */,
 				CD2ECEC2269539100055E302 /* MBIMAuthenticateOperation.m in Sources */,

kordophone/Bridge/MBIMHTTPConnection.m

@@ -12,6 +12,8 @@
 #import "MBIMBridge_Private.h"
 #import "MBIMBridgeOperation.h"
 #import "MBIMAuthToken.h"
+#import "MBIMUpdateQueue.h"
+#import "MBIMURLUtilities.h"
 
 #import <Security/Security.h>
 #import <CocoaHTTPServer/HTTPMessage.h>
@@ -107,6 +109,7 @@
     if (operationClass != nil) {
         _currentOperation = [[operationClass alloc] initWithRequestURL:url completion:completion];
         _currentOperation.requestBodyData = _bodyData;
+        _currentOperation.request = self->request;
         
         [[[MBIMBridge sharedInstance] operationQueue] addOperation:_currentOperation];
         long status = dispatch_semaphore_wait(sema, dispatch_time(DISPATCH_TIME_NOW, (int64_t)(60.0 * NSEC_PER_SEC)));
@@ -124,6 +127,24 @@
     return response;
 }
 
+- (WebSocket *)webSocketForURI:(NSString *)path
+{
+    NSURL *url = [NSURL URLWithString:path];
+    NSString *endpointName = [url lastPathComponent];
+    NSString *authTokenString = [url valueForQueryItemWithName:@"token"];
+    MBIMAuthToken *authToken = [[MBIMAuthToken alloc] initWithTokenString:authTokenString];
+    
+    if ([endpointName isEqualToString:@"updates"]) {
+        if (![authToken isValid]) {
+            return nil;
+        }
+        
+        return [[MBIMUpdateQueue sharedInstance] vendUpdateWebSocketConsumerForRequest:request socket:asyncSocket];
+    }
+    
+    return [super webSocketForURI:path];
+}
+
 - (BOOL)expectsRequestBodyFromMethod:(NSString *)method atPath:(NSString *)path
 {
     if ([method isEqualToString:@"POST"]) {

kordophone/Bridge/MBIMUpdateQueue.h

@@ -10,6 +10,9 @@
 #import "IMFoundation_ClassDump.h"
 
 NS_ASSUME_NONNULL_BEGIN
+@class GCDAsyncSocket;
+@class HTTPMessage;
+@class WebSocket;
 
 @interface MBIMUpdateItem : NSObject
 @property (nonatomic, strong) IMChat *changedChat;
@@ -24,11 +27,13 @@ typedef void (^MBIMUpdateConsumer)(NSArray<MBIMUpdateItem *> *items);
 
 + (instancetype)sharedInstance;
 
-- (void)addConsumer:(MBIMUpdateConsumer)consumer withLastSyncedMessageSeq:(NSInteger)messageSeq;
+- (void)addPollingConsumer:(MBIMUpdateConsumer)consumer withLastSyncedMessageSeq:(NSInteger)messageSeq;
-- (void)removeConsumer:(MBIMUpdateConsumer)consumer;
+- (void)removePollingConsumer:(MBIMUpdateConsumer)consumer;
 
 - (void)enqueueUpdateItem:(MBIMUpdateItem *)item;
 
+- (WebSocket *)vendUpdateWebSocketConsumerForRequest:(HTTPMessage *)request socket:(GCDAsyncSocket *)socket;
+
 @end
 
 NS_ASSUME_NONNULL_END

kordophone/Bridge/MBIMUpdateQueue.m

@@ -9,20 +9,29 @@
 #import "MBIMUpdateQueue.h"
 #import "IMMessageItem+Encoded.h"
 #import "IMChat+Encoded.h"
+#import "MBIMHTTPConnection.h"
+#import "MBIMURLUtilities.h"
+
+#import <CocoaHTTPServer/GCDAsyncSocket.h>
+#import <CocoaHTTPServer/HTTPMessage.h>
+#import <CocoaHTTPServer/WebSocket.h>
 
 static const NSUInteger kUpdateItemsCullingLength = 100;
 
-@interface MBIMUpdateItem (/*INTERNAL*/)
+@interface MBIMUpdateItem (/*INTERNAL*/) <WebSocketDelegate>
 @property (nonatomic, assign) NSUInteger messageSequenceNumber;
 @end
 
 @implementation MBIMUpdateQueue {
     NSUInteger           _messageSequenceNumber;
     dispatch_queue_t     _accessQueue;
-    NSMutableArray      *_consumers;
+    NSMutableArray      *_longPollConsumers;
     
     // Maps message sequence number to update item
     NSMutableDictionary<NSNumber *, MBIMUpdateItem *> *_updateItemHistory;
+    
+    // WebSocket consumers
+    NSMutableDictionary<NSString *, MBIMUpdateConsumer> *_websocketConsumers;
 }
 
 + (instancetype)sharedInstance
@@ -41,20 +50,93 @@ static const NSUInteger kUpdateItemsCullingLength = 100;
     self = [super init];
     if (self) {
         _accessQueue = dispatch_queue_create("net.buzzert.MBIMUpdateQueue", DISPATCH_QUEUE_SERIAL);
-        _consumers = [[NSMutableArray alloc] init];
         _messageSequenceNumber = 0;
         _updateItemHistory = [[NSMutableDictionary alloc] init];
+        _websocketConsumers = [[NSMutableDictionary alloc] init];
+        _longPollConsumers = [[NSMutableArray alloc] init];
     }
     
     return self;
 }
 
-- (void)addConsumer:(MBIMUpdateConsumer)consumer withLastSyncedMessageSeq:(NSInteger)messageSeq
+- (void)addPollingConsumer:(MBIMUpdateConsumer)consumer withLastSyncedMessageSeq:(NSInteger)messageSeq
 {
-    __weak NSMutableArray *consumers = _consumers;
+    if (![self _syncConsumer:consumer fromLastMessageSeq:messageSeq]) {
+        __weak NSMutableArray *consumers = _longPollConsumers;
+        dispatch_async(_accessQueue, ^{
+            [consumers addObject:consumer];
+        });
+    }
+}
+
+- (void)removePollingConsumer:(MBIMUpdateConsumer)consumer
+{
+    __weak NSMutableArray *consumers = _longPollConsumers;
+    dispatch_async(_accessQueue, ^{
+        [consumers removeObject:consumer];
+    });
+}
+
+- (void)enqueueUpdateItem:(MBIMUpdateItem *)item
+{
+    __weak __auto_type pollingConsumers = _longPollConsumers;
+    __weak __auto_type websocketConsumers = _websocketConsumers;
     __weak NSMutableDictionary *updateItemHistory = _updateItemHistory;
     dispatch_async(_accessQueue, ^{
-        if ((messageSeq >= 0) && messageSeq < self->_messageSequenceNumber) {
+        self->_messageSequenceNumber++;
+        item.messageSequenceNumber = self->_messageSequenceNumber;
+        
+        // Notify polling consumers
+        for (MBIMUpdateConsumer consumer in pollingConsumers) {
+            consumer(@[ item ]);
+        }
+        [pollingConsumers removeAllObjects];
+        
+        // Notify websocket consumers
+        for (MBIMUpdateConsumer consumer in [websocketConsumers allValues]) {
+            consumer(@[ item ]);
+        }
+        
+        [updateItemHistory setObject:item forKey:@(item.messageSequenceNumber)];
+        
+        [self _cullUpdateItems];
+    });
+}
+
+- (WebSocket *)vendUpdateWebSocketConsumerForRequest:(HTTPMessage *)request socket:(GCDAsyncSocket *)gcdSocket
+{
+    WebSocket *socket = [[WebSocket alloc] initWithRequest:request socket:gcdSocket];
+    socket.delegate = self;
+    
+    MBIMUpdateConsumer consumer = ^(NSArray<MBIMUpdateItem *> *updates) {
+        NSMutableArray *encodedUpdates = [NSMutableArray array];
+        for (MBIMUpdateItem *item in updates) {
+            NSDictionary *updateDict = [item dictionaryRepresentation];
+            [encodedUpdates addObject:updateDict];
+        }
+        
+        NSData *data = [NSJSONSerialization dataWithJSONObject:encodedUpdates options:0 error:NULL];
+        [socket sendData:data];
+    };
+    
+    NSString *messageSeqString = [[request url] valueForQueryItemWithName:@"seq"];
+    [self _syncConsumer:consumer fromLastMessageSeq:(messageSeqString ? [messageSeqString integerValue] : -1)];
+    
+    __weak __auto_type websocketConsumers = _websocketConsumers;
+    dispatch_async(_accessQueue, ^{
+        NSString *websocketKey = [socket description];
+        [websocketConsumers setObject:consumer forKey:websocketKey];
+    });
+    
+    return socket;
+}
+
+- (BOOL)_syncConsumer:(MBIMUpdateConsumer)consumer fromLastMessageSeq:(NSInteger)messageSeq
+{
+    const BOOL needsSync = (messageSeq >= 0) && messageSeq < self->_messageSequenceNumber;
+    if (needsSync) {
+        __weak NSMutableDictionary *updateItemHistory = _updateItemHistory;
+        dispatch_async(_accessQueue, ^{
             NSMutableArray *batchedUpdates = [NSMutableArray array];
             for (NSUInteger seq = messageSeq + 1; seq <= self->_messageSequenceNumber; seq++) {
                 MBIMUpdateItem *item = [updateItemHistory objectForKey:@(seq)];
@@ -64,37 +146,10 @@ static const NSUInteger kUpdateItemsCullingLength = 100;
             }
             
             consumer(batchedUpdates);
-        } else {
+        });
-            [consumers addObject:consumer];
+    }
-        }
-    });
-}
     
-- (void)removeConsumer:(MBIMUpdateConsumer)consumer
+    return needsSync;
-{
-    __weak NSMutableArray *consumers = _consumers;
-    dispatch_async(_accessQueue, ^{
-        [consumers removeObject:consumer];
-    });
-}
-
-- (void)enqueueUpdateItem:(MBIMUpdateItem *)item
-{
-    __weak NSMutableArray *consumers = _consumers;
-    __weak NSMutableDictionary *updateItemHistory = _updateItemHistory;
-    dispatch_async(_accessQueue, ^{
-        self->_messageSequenceNumber++;
-        item.messageSequenceNumber = self->_messageSequenceNumber;
-        
-        for (MBIMUpdateConsumer consumer in consumers) {
-            consumer(@[ item ]);
-        }
-        
-        [consumers removeAllObjects];
-        [updateItemHistory setObject:item forKey:@(item.messageSequenceNumber)];
-        
-        [self _cullUpdateItems];
-    });
 }
 
 - (void)_cullUpdateItems
@@ -113,6 +168,18 @@ static const NSUInteger kUpdateItemsCullingLength = 100;
     });
 }
 
+#pragma mark - <WebSocketDelegate>
+
+- (void)webSocketDidClose:(WebSocket *)ws
+{
+    // xxx: not great, but works.
+    NSString *websocketKey = [ws description];
+    __weak __auto_type websocketConsumers = _websocketConsumers;
+    dispatch_async(_accessQueue, ^{
+        [websocketConsumers removeObjectForKey:websocketKey];
+    });
+}
+
 @end
 
 @implementation MBIMUpdateItem

kordophone/Bridge/Operations/MBIMBridgeOperation.h

@@ -7,6 +7,7 @@
 //
 
 #import <Foundation/Foundation.h>
+#import <CocoaHTTPServer/HTTPMessage.h>
 #import <CocoaHTTPServer/HTTPResponse.h>
 #import <CocoaHTTPServer/HTTPErrorResponse.h>
 
@@ -20,6 +21,7 @@ typedef void (^MBIMBridgeOperationCompletionBlock)(NSObject<HTTPResponse> * _Nul
 @property (class, nonatomic, readonly) NSString *endpointName;
 @property (class, nonatomic, readonly) BOOL requiresAuthentication; // default YES
 
+@property (nonatomic, strong) HTTPMessage *request;
 @property (nonatomic, strong) NSData *requestBodyData;
 @property (nonatomic, readonly) NSURL *requestURL;
 @property (nonatomic, readonly) MBIMBridgeOperationCompletionBlock serverCompletionBlock;

kordophone/Bridge/Operations/MBIMBridgeOperation.m

@@ -7,6 +7,7 @@
 //
 
 #import "MBIMBridgeOperation.h"
+#import "MBIMURLUtilities.h"
 
 @interface MBIMBridgeOperation (/*INTERNAL*/)
 @property (nonatomic, strong) NSURL *requestURL;
@@ -79,18 +80,7 @@
 
 - (NSString *)valueForQueryItemWithName:(NSString *)queryItemName
 {
-    NSURLComponents *urlComponents = [NSURLComponents componentsWithURL:self.requestURL
+    return [[self requestURL] valueForQueryItemWithName:queryItemName];
-                                                resolvingAgainstBaseURL:NO];
-    
-    NSString *value = nil;
-    for (NSURLQueryItem *queryItem in [urlComponents queryItems]) {
-        if ([[queryItem name] isEqualToString:queryItemName]) {
-            value = [queryItem value];
-            break;
-        }
-    }
-    
-    return value;
 }
 
 @end

kordophone/Bridge/Operations/MBIMFetchAttachmentOperation.m

@@ -8,8 +8,11 @@
 
 #import "MBIMFetchAttachmentOperation.h"
 #import "MBIMDataResponse.h"
+#import "MBIMImageUtils.h"
 
 #import "IMCore_ClassDump.h"
+#import "IMSharedUtilities_ClassDump.h"
+#import <CoreGraphics/CoreGraphics.h>
 
 @implementation MBIMFetchAttachmentOperation
 
@@ -24,8 +27,8 @@
 {
     NSObject<HTTPResponse> *response = nil;
     do {
+        BOOL preview = [[self valueForQueryItemWithName:@"preview"] boolValue];
         NSString *guid = [self valueForQueryItemWithName:@"guid"];
-        
         if (!guid) {
             MBIMLogInfo(@"No query item provided");
             response = [[HTTPErrorResponse alloc] initWithErrorCode:500];
@@ -45,22 +48,68 @@
             break;
         }
         
-        NSString *localPath = [transfer localPath];
+        NSData *responseData = nil;
-        NSData *responseData = [NSData dataWithContentsOfFile:localPath];
+        NSURL *localURL = [transfer localURL];
+        NSString *extension = [[localURL pathExtension] lowercaseString];
+        if (preview) {
+            NSURL *previewURL = IMAttachmentPreviewFileURL(localURL, extension, YES);
+            if (![[NSFileManager defaultManager] fileExistsAtPath:[previewURL path]]) {
+                MBIMLogInfo(@"Generating preview image for guid: %@ at %@", guid, [previewURL path]);
+                
+                // Fetch preview constraints from transfer
+                NSDictionary *previewConstraintsDict = [[transfer attributionInfo] objectForKey:@"pgenszc"];
+                if (!previewConstraintsDict) {
+                    MBIMLogInfo(@"No preview constraints for attachment guid: %@", guid);
+                    response = [[HTTPErrorResponse alloc] initWithErrorCode:500];
+                    break;
+                }
+                
+                IMPreviewConstraints constraints = IMPreviewConstraintsFromDictionary(previewConstraintsDict);
+                
+                // Generate preview using preview generator manager
+                NSError *error = nil;
+                IMPreviewGeneratorManager *generator = [IMPreviewGeneratorManager sharedInstance];
+                CGImageRef previewImage = [generator newPreviewFromSourceURL:localURL withPreviewConstraints:constraints error:&error];
+                if (error) {
+                    MBIMLogInfo(@"Unable to generate preview for attachment guid: %@", guid);
+                    response = [[HTTPErrorResponse alloc] initWithErrorCode:500];
+                    break;
+                }
+                
+                // Convert to JPEG.
+                responseData = MBIMCGImageJPEGRepresentation(previewImage);
+                
+                // Persist JPEG preview to disk
+                if (previewURL) {
+                    [responseData writeToURL:previewURL atomically:YES];
+                }
+            } else {
+                // File exists
+                MBIMLogInfo(@"Using cached preview image for guid: %@ at %@", guid, [previewURL path]);
+                responseData = [NSData dataWithContentsOfURL:previewURL];
+            }
+        } else {
+            responseData = [NSData dataWithContentsOfURL:localURL];
+        }
+         
         if (!responseData) {
-            MBIMLogInfo(@"Wasn't able to load data from local path: %@", localPath);
+            MBIMLogInfo(@"Wasn't able to load data for guid: %@", guid);
             response = [[HTTPErrorResponse alloc] initWithErrorCode:404];
             break;
         }
         
         NSString *mimeType = [transfer mimeType];
+        if ([mimeType isEqualToString:@"image/heic"]) {
+            // TODO: We should convert this to JPEG here. I don't want clients to have to deal with HEIC.
+            MBIMLogInfo(@"WARNING: Returning HEIC data for attachment %@", guid);
+        }
+        
         // It's unusual, but if this is nil, try to guess the MIME type based on the filename
         if (!mimeType) {
-            NSString *extension = [[localPath pathExtension] lowercaseString];
-
             // XXX: REALLY hacky
             mimeType = [NSString stringWithFormat:@"image/%@", extension];
         }
+        
         response = [[MBIMDataResponse alloc] initWithData:responseData contentType:mimeType];
     } while (0);
     

kordophone/Bridge/Operations/MBIMSendMessageOperation.m

@@ -46,7 +46,9 @@
             MBIMLogInfo(@"Chat does not exist: %@", chatGUID);
             result = NO;
         } else {
-            [chat sendMessage:reply];
+            dispatch_async(dispatch_get_main_queue(), ^{
+                [chat sendMessage:reply];
+            });
         }
     });
     

kordophone/Bridge/Operations/MBIMUpdatePollOperation.m

@@ -40,13 +40,13 @@
         weakSelf.serverCompletionBlock(response);
     };
     
-    [[MBIMUpdateQueue sharedInstance] addConsumer:_updateConsumer withLastSyncedMessageSeq:messageSeq];
+    [[MBIMUpdateQueue sharedInstance] addPollingConsumer:_updateConsumer withLastSyncedMessageSeq:messageSeq];
 }
 
 - (void)cancel
 {
     [super cancel];
-    [[MBIMUpdateQueue sharedInstance] removeConsumer:_updateConsumer];
+    [[MBIMUpdateQueue sharedInstance] removePollingConsumer:_updateConsumer];
 }
 
 - (NSObject<HTTPResponse> *)cancelAndReturnTimeoutResponse

kordophone/Bridge/Operations/MBIMVersionOperation.m

@@ -21,6 +21,11 @@ const char* MBIMVersion() {
 
 + (void)load { [super load]; }
 
++ (BOOL)requiresAuthentication
+{
+    return NO;
+}
+
 + (NSString *)endpointName
 {
     return @"version";

kordophone/Bridge/Operations/Utilities/MBIMImageUtils.h

@@ -0,0 +1,12 @@
+//
+//  MBIMImageUtils.h
+//  kordophoned
+//
+//  Created by James Magahern on 12/20/22.
+//  Copyright © 2022 James Magahern. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+#import <CoreGraphics/CoreGraphics.h>
+
+extern NSData* MBIMCGImageJPEGRepresentation(CGImageRef imageRef);

kordophone/Bridge/Operations/Utilities/MBIMImageUtils.m

@@ -0,0 +1,37 @@
+//
+//  MBIMImageUtils.m
+//  kordophoned
+//
+//  Created by James Magahern on 12/20/22.
+//  Copyright © 2022 James Magahern. All rights reserved.
+//
+
+#import "MBIMImageUtils.h"
+#import <ImageIO/ImageIO.h>
+
+NSData* MBIMCGImageJPEGRepresentation(CGImageRef imageRef)
+{
+    if (imageRef == NULL) return nil;
+    
+    NSNumber *const DPI = @72.0;
+    NSNumber *const compressionQuality = @0.9;
+    NSDictionary *properties = @{
+        (__bridge NSString *)kCGImagePropertyDPIWidth : DPI,
+        (__bridge NSString *)kCGImagePropertyDPIHeight : DPI,
+        (__bridge NSString *)kCGImageDestinationLossyCompressionQuality : compressionQuality,
+    };
+    
+    bool success = false;
+    NSMutableData *data = [NSMutableData data];
+    if (data) {
+        CGImageDestinationRef imageDestination = CGImageDestinationCreateWithData((CFMutableDataRef)data, CFSTR("public.jpeg"), 1/*count*/, NULL/*options*/);
+        if (imageDestination != NULL) {
+            CGImageDestinationAddImage(imageDestination, imageRef, (__bridge CFDictionaryRef)properties);
+            success = CGImageDestinationFinalize(imageDestination);
+            CFRelease(imageDestination);
+        }
+    }
+
+    return success ? data : nil;
+}
+

kordophone/Bridge/Operations/Utilities/MBIMURLUtilities.h

@@ -0,0 +1,17 @@
+//
+//  MBIMURLUtilities.h
+//  kordophoned
+//
+//  Created by James Magahern on 1/17/23.
+//  Copyright © 2023 James Magahern. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface NSURL (MBIMURLUtilities)
+- (nullable NSString *)valueForQueryItemWithName:(NSString *)queryItemName;
+@end
+
+NS_ASSUME_NONNULL_END

kordophone/Bridge/Operations/Utilities/MBIMURLUtilities.m

@@ -0,0 +1,28 @@
+//
+//  MBIMURLUtilities.m
+//  kordophoned
+//
+//  Created by James Magahern on 1/17/23.
+//  Copyright © 2023 James Magahern. All rights reserved.
+//
+
+#import "MBIMURLUtilities.h"
+
+@implementation NSURL (MBIMURLUtilities)
+
+- (nullable NSString *)valueForQueryItemWithName:(NSString *)queryItemName
+{
+    NSURLComponents *urlComponents = [NSURLComponents componentsWithURL:self resolvingAgainstBaseURL:NO];
+    
+    NSString *value = nil;
+    for (NSURLQueryItem *queryItem in [urlComponents queryItems]) {
+        if ([[queryItem name] isEqualToString:queryItemName]) {
+            value = [queryItem value];
+            break;
+        }
+    }
+    
+    return value;
+}
+
+@end

kordophone/Categories/IMChat+Encoded.m

@@ -21,7 +21,7 @@
     
     IMMessage *lastMessage = [self lastMessage];
     if (lastMessage) {
-        chatDict[@"lastMessagePreview"] = [[lastMessage text] string];
+        chatDict[@"lastMessagePreview"] = [lastMessage descriptionForPurpose:IMMessageDescriptionConversationList];
     }
     
     NSMutableArray *participantStrings = [NSMutableArray array];

kordophone/Categories/IMMessageItem+Encoded.m

@@ -21,16 +21,27 @@
     
     if ([self fileTransferGUIDs]) {
         // Support only images right now
+        NSMutableDictionary *attachmentMetadatas = [NSMutableDictionary dictionary];
         NSMutableArray *filteredFileTransferGUIDs = [NSMutableArray array];
         for (NSString *guid in self.fileTransferGUIDs) {
+            NSMutableDictionary *metadata = [NSMutableDictionary dictionary];
             IMFileTransfer *transfer = [[IMFileTransferCenter sharedInstance] transferForGUID:guid];
             if ([[transfer mimeType] containsString:@"image"]) {
                 [filteredFileTransferGUIDs addObject:guid];
+                
+                if ([transfer attributionInfo] != nil) {
+                    metadata[@"attributionInfo"] = [transfer attributionInfo];
+                }
+            }
+            
+            if (metadata.count) {
+                attachmentMetadatas[guid] = metadata;
             }
         }
         
         if ([filteredFileTransferGUIDs count]) {
             messageDict[@"fileTransferGUIDs"] = filteredFileTransferGUIDs;
+            messageDict[@"attachmentMetadata"] = attachmentMetadatas;
         }
     }