Implement open group message conversion

SessionMessagingKit/Messages/Visible Message/VisibleMessage+LinkPreview.swift

@@ -7,6 +7,8 @@ public extension VisibleMessage {
         public var title: String?
         public var url: String?
 
+        public var isValid: Bool { title != nil && url != nil } 
+
         internal init(title: String?, url: String) {
             self.title = title
             self.url = url

SessionMessagingKit/Messages/Visible Message/VisibleMessage+Quote.swift

@@ -8,6 +8,8 @@ public extension VisibleMessage {
         public var publicKey: String?
         public var text: String?
 
+        public var isValid: Bool { timestamp != nil && publicKey != nil && text != nil }
+
         internal init(timestamp: UInt64, publicKey: String, text: String) {
             self.timestamp = timestamp
             self.publicKey = publicKey

SessionMessagingKit/Open Groups/OpenGroupMessage+Conversion.swift

@@ -0,0 +1,35 @@
+
+internal extension OpenGroupMessage {
+
+    static func from(_ message: VisibleMessage, for server: String) -> OpenGroupMessage? {
+        guard message.isValid else { preconditionFailure() } // Should be valid at this point
+        let storage = Configuration.shared.storage
+        let displayName = storage.getUserDisplayName() ?? "Anonymous"
+        guard let userPublicKey = storage.getUserPublicKey() else { return nil }
+        let quote: OpenGroupMessage.Quote? = {
+            if let quote = message.quote {
+                guard quote.isValid else { return nil }
+                return OpenGroupMessage.Quote(quotedMessageTimestamp: quote.timestamp!, quoteePublicKey: quote.publicKey!, quotedMessageBody: quote.text!, quotedMessageServerID: nil) // TODO: Server ID
+            } else {
+                return nil
+            }
+        }()
+        let body = message.text!
+        let result = OpenGroupMessage(serverID: nil, senderPublicKey: userPublicKey, displayName: displayName, profilePicture: nil, body: body,
+            type: OpenGroupAPI.openGroupMessageType, timestamp: message.sentTimestamp!, quote: quote, attachments: [], signature: nil, serverTimestamp: 0)
+        if let linkPreview: OpenGroupMessage.Attachment = {
+            if let linkPreview = message.linkPreview {
+                guard linkPreview.isValid else { return nil }
+                // TODO: Implement
+                return OpenGroupMessage.Attachment(kind: .linkPreview, server: server, serverID: 0, contentType: "", size: 0, fileName: "",
+                    flags: 0, width: 0, height: 0, caption: "", url: "", linkPreviewURL: "", linkPreviewTitle: "")
+            } else {
+                return nil
+            }
+        }() {
+            result.attachments.append(linkPreview)
+        }
+        // TODO: Attachments
+        return result
+    }
+}

SessionMessagingKit/Sending & Receiving/MessageReceiver.swift

@@ -40,6 +40,7 @@ internal enum MessageReceiver {
         case .closedGroupCiphertext: (plaintext, _) = try decryptWithSharedSenderKeys(envelope: envelope, using: transaction)
         default: throw Error.unknownEnvelopeType
         }
+        // Parse the proto
         let proto: SNProtoContent
         do {
             proto = try SNProtoContent.parseData((plaintext as NSData).removePadding())
@@ -47,6 +48,7 @@ internal enum MessageReceiver {
             SNLog("Couldn't parse proto due to error: \(error).")
             throw error
         }
+        // Parse the message
         let message: Message? = {
             if let readReceipt = ReadReceipt.fromProto(proto) { return readReceipt }
             if let sessionRequest = SessionRequest.fromProto(proto) { return sessionRequest }

SessionMessagingKit/Sending & Receiving/MessageSender.swift

@@ -23,7 +23,7 @@ internal enum MessageSender {
     internal static func send(_ message: Message, to destination: Message.Destination, using transaction: Any) -> Promise<Void> {
         switch destination {
         case .contact(_), .closedGroup(_): return sendToSnodeDestination(destination, message: message, using: transaction)
-        default: fatalError("Not implemented.")
+        case .openGroup(_, _): return sendToOpenGroupDestination(destination, message: message, using: transaction)
         }
     }
 
@@ -133,4 +133,24 @@ internal enum MessageSender {
         }
         return promise
     }
+
+    internal static func sendToOpenGroupDestination(_ destination: Message.Destination, message: Message, using transaction: Any) -> Promise<Void> {
+        guard message.isValid else { return Promise(error: Error.invalidMessage) }
+        let (channel, server) = { () -> (UInt64, String) in
+            switch destination {
+            case .openGroup(let channel, let server): return (channel, server)
+            default: preconditionFailure()
+            }
+        }()
+        guard let message = message as? VisibleMessage,
+            let openGroupMessage = OpenGroupMessage.from(message, for: server) else { return Promise(error: Error.invalidMessage) }
+        let promise = OpenGroupAPI.sendMessage(openGroupMessage, to: channel, on: server)
+        let _ = promise.done(on: DispatchQueue.global(qos: .userInitiated)) { _ in
+            // TODO: Save server message ID
+        }
+        promise.catch(on: DispatchQueue.global(qos: .userInitiated)) { _ in
+            // TODO: Handle failure
+        }
+        return promise.map { _ in }
+    }
 }

Signal.xcodeproj/project.pbxproj

@@ -664,6 +664,7 @@
 		C3A7225E2558C38D0043A11F /* AnyPromise+Retaining.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3A7225D2558C38D0043A11F /* AnyPromise+Retaining.swift */; };
 		C3A722802558C4E10043A11F /* AttachmentStream.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3A7227F2558C4E10043A11F /* AttachmentStream.swift */; };
 		C3A722922558C8940043A11F /* OpenGroupAPIDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3A722912558C8940043A11F /* OpenGroupAPIDelegate.swift */; };
+		C3A7229C2558E4310043A11F /* OpenGroupMessage+Conversion.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3A7229B2558E4310043A11F /* OpenGroupMessage+Conversion.swift */; };
 		C3AABDDF2553ECF00042FF4C /* Array+Description.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3C2A5D12553860800C340D1 /* Array+Description.swift */; };
 		C3BBE0762554CDA60050F1E3 /* Configuration.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3BBE0752554CDA60050F1E3 /* Configuration.swift */; };
 		C3BBE0802554CDD70050F1E3 /* Storage.swift in Sources */ = {isa = PBXBuildFile; fileRef = C3BBE07F2554CDD70050F1E3 /* Storage.swift */; };
@@ -1713,6 +1714,7 @@
 		C3A7225D2558C38D0043A11F /* AnyPromise+Retaining.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "AnyPromise+Retaining.swift"; sourceTree = "<group>"; };
 		C3A7227F2558C4E10043A11F /* AttachmentStream.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AttachmentStream.swift; sourceTree = "<group>"; };
 		C3A722912558C8940043A11F /* OpenGroupAPIDelegate.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = OpenGroupAPIDelegate.swift; sourceTree = "<group>"; };
+		C3A7229B2558E4310043A11F /* OpenGroupMessage+Conversion.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "OpenGroupMessage+Conversion.swift"; sourceTree = "<group>"; };
 		C3AA6BB824CE8F1B002358B6 /* Migrating Translations from Android.md */ = {isa = PBXFileReference; lastKnownFileType = net.daringfireball.markdown; path = "Migrating Translations from Android.md"; sourceTree = "<group>"; };
 		C3AECBEA24EF5244005743DE /* fa */ = {isa = PBXFileReference; lastKnownFileType = text.plist.strings; name = fa; path = translations/fa.lproj/Localizable.strings; sourceTree = "<group>"; };
 		C3BBE0752554CDA60050F1E3 /* Configuration.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Configuration.swift; sourceTree = "<group>"; };
@@ -3405,6 +3407,7 @@
 				C3A722912558C8940043A11F /* OpenGroupAPIDelegate.swift */,
 				C3A721362558BDFA0043A11F /* OpenGroupInfo.swift */,
 				C3A721342558BDF90043A11F /* OpenGroupMessage.swift */,
+				C3A7229B2558E4310043A11F /* OpenGroupMessage+Conversion.swift */,
 			);
 			path = "Open Groups";
 			sourceTree = "<group>";
@@ -5090,6 +5093,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				C3A7229C2558E4310043A11F /* OpenGroupMessage+Conversion.swift in Sources */,
 				C3471F4C25553AB000297E91 /* MessageReceiver+Decryption.swift in Sources */,
 				C3A722802558C4E10043A11F /* AttachmentStream.swift in Sources */,
 				C300A5D32554B05A00555489 /* TypingIndicator.swift in Sources */,