Show group images

Session/Open Groups/OpenGroupSuggestionGrid.swift

@@ -110,6 +110,16 @@ extension OpenGroupSuggestionGrid {
         
         static let identifier = "OpenGroupSuggestionGridCell"
         
+        private lazy var imageView: UIImageView = {
+            let result = UIImageView()
+            let size: CGFloat = 24
+            result.set(.width, to: size)
+            result.set(.height, to: size)
+            result.layer.cornerRadius = size / 2
+            result.clipsToBounds = true
+            return result
+        }()
+        
         private lazy var label: UILabel = {
             let result = UILabel()
             result.textColor = Colors.text
@@ -129,10 +139,13 @@ extension OpenGroupSuggestionGrid {
         }
         
         private func setUpViewHierarchy() {
-            addSubview(label)
-            label.center(in: self)
-            label.leadingAnchor.constraint(greaterThanOrEqualTo: leadingAnchor, constant: Values.smallSpacing).isActive = true
-            trailingAnchor.constraint(greaterThanOrEqualTo: label.trailingAnchor, constant: Values.smallSpacing).isActive = true
+            let stackView = UIStackView(arrangedSubviews: [ imageView, label ])
+            stackView.axis = .horizontal
+            stackView.spacing = Values.smallSpacing
+            addSubview(stackView)
+            stackView.center(in: self)
+            stackView.leadingAnchor.constraint(greaterThanOrEqualTo: leadingAnchor, constant: Values.smallSpacing).isActive = true
+            trailingAnchor.constraint(greaterThanOrEqualTo: stackView.trailingAnchor, constant: Values.smallSpacing).isActive = true
             setUpSeparators()
         }
         
@@ -165,6 +178,9 @@ extension OpenGroupSuggestionGrid {
         
         private func update() {
             guard let room = room else { return }
+            let promise = OpenGroupAPIV2.getGroupImage(for: room.id, on: OpenGroupAPIV2.defaultServer)
+            imageView.image = given(promise.value) { UIImage(data: $0)! }
+            imageView.isHidden = (imageView.image == nil)
             label.text = room.name
             rightSeparator.alpha = showRightSeparator ? 1 :0
             bottomSeparator.alpha = showBottomSeparator ? 1 :0

SessionMessagingKit/Open Groups/V2/OpenGroupAPIV2.swift

@@ -1,6 +1,8 @@
 import PromiseKit
 import SessionSnodeKit
 
+// TODO: Cache group images
+
 @objc(SNOpenGroupAPIV2)
 public final class OpenGroupAPIV2 : NSObject {
     private static var moderators: [String:[String:Set<String>]] = [:] // Server URL to room ID to set of moderator IDs
@@ -322,9 +324,13 @@ public final class OpenGroupAPIV2 : NSObject {
         Storage.shared.write(with: { transaction in
             Storage.shared.setOpenGroupPublicKey(for: defaultServer, to: defaultServerPublicKey, using: transaction)
         }, completion: {
-            defaultRoomsPromise = attempt(maxRetryCount: 8, recoveringOn: DispatchQueue.main) {
+            let promise = attempt(maxRetryCount: 8, recoveringOn: DispatchQueue.main) {
                 OpenGroupAPIV2.getAllRooms(from: defaultServer)
             }
+            let _ = promise.done(on: DispatchQueue.global(qos: .userInitiated)) { items in
+                items.forEach { getGroupImage(for: $0.id, on: defaultServer).retainUntilComplete() }
+            }
+            defaultRoomsPromise = promise
         })
     }
     
@@ -370,7 +376,7 @@ public final class OpenGroupAPIV2 : NSObject {
         if let promise = groupImagePromises["\(server).\(room)"] {
             return promise
         } else {
-            let request = Request(verb: .get, room: room, server: server, endpoint: "image")
+            let request = Request(verb: .get, room: room, server: server, endpoint: "group_image")
             let promise: Promise<Data> = send(request).map(on: DispatchQueue.global(qos: .userInitiated)) { json in
                 guard let base64EncodedFile = json["result"] as? String, let file = Data(base64Encoded: base64EncodedFile) else { throw Error.parsingFailed }
                 return file