Don't allow input on rss groups.

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -564,6 +564,16 @@ typedef enum : NSUInteger {
     return !groupThread.isLocalUserInGroup;
 }
 
+- (BOOL)isRSSGroup
+{
+    if (![_thread isKindOfClass:[TSGroupThread class]]) {
+        return NO;
+    }
+    
+    TSGroupThread *groupThread = (TSGroupThread *)self.thread;
+    return groupThread.isRSS;
+}
+
 - (void)hideInputIfNeeded
 {
     if (_peek) {
@@ -572,7 +582,7 @@ typedef enum : NSUInteger {
         return;
     }
 
-    if (self.userLeftGroup) {
+    if (self.userLeftGroup || self.isRSSGroup) {
         self.inputToolbar.hidden = YES; // user has requested they leave the group. further sends disallowed
         [self dismissKeyBoard];
     } else {

SignalServiceKit/src/Contacts/Threads/TSGroupThread.h

@@ -16,6 +16,7 @@ extern NSString *const TSGroupThread_NotificationKey_UniqueId;
 @interface TSGroupThread : TSThread
 
 @property (nonatomic, strong) TSGroupModel *groupModel;
+@property (nonatomic, readonly) BOOL isRSS;
 
 + (instancetype)getOrCreateThreadWithGroupModel:(TSGroupModel *)groupModel;
 + (instancetype)getOrCreateThreadWithGroupModel:(TSGroupModel *)groupModel

SignalServiceKit/src/Contacts/Threads/TSGroupThread.m

@@ -266,6 +266,12 @@ NSString *const TSGroupThread_NotificationKey_UniqueId = @"TSGroupThread_Notific
     return [self.class stableColorNameForNewConversationWithString:[self threadIdFromGroupId:groupId]];
 }
 
+- (BOOL)isRSS
+{
+    NSString *groupID = [[NSString alloc] initWithData:self.groupModel.groupId encoding:NSUTF8StringEncoding];
+    return groupID != nil && [groupID containsString:@"rss:"];
+}
+
 @end
 
 NS_ASSUME_NONNULL_END

SignalServiceKit/src/Loki/API/LokiRSSFeed.swift

@@ -7,7 +7,7 @@ public final class LokiRSSFeed : NSObject {
     @objc public let isDeletable: Bool
     
     @objc public init(id: String, server: String, displayName: String, isDeletable: Bool) {
-        self.id = id
+        self.id = "rss://\(id)"
         self.server = server
         self.displayName = displayName
         self.isDeletable = isDeletable