New backend work

Models, account connection, fetching user profiles,
show connected accounts in sidebar

src/qml/EventHandlers/includes.js

@@ -1,2 +1,5 @@
 // FIXME: Obsolete method, but need Qt 5.12+ for standard JS modules import
 Qt.include("app.js")
+Qt.include("users.js")
+Qt.include("rooms.js")
+Qt.include("rooms_timeline.js")

src/qml/EventHandlers/rooms.js

@@ -0,0 +1,60 @@
+function clientId(user_id, category, room_id) {
+    return user_id + " " + room_id + " " + category
+}
+
+
+function onRoomUpdated(user_id, category, room_id, display_name, avatar_url,
+                       topic, last_event_date, inviter, left_event) {
+
+    var client_id = clientId(user_id, category, room_id)
+    var rooms     = models.rooms
+
+    if (category == "Invites") {
+        rooms.popWhere("clientId", clientId(user_id, "Rooms", room_id))
+        rooms.popWhere("clientId", clientId(user_id, "Left", room_id))
+    }
+    else if (category == "Rooms") {
+        rooms.popWhere("clientId", clientId(user_id, "Invites", room_id))
+        rooms.popWhere("clientId", clientId(user_id, "Left", room_id))
+    }
+    else if (category == "Left") {
+        var old_room  =
+            rooms.popWhere("clientId", clientId(user_id, "Rooms", room_id)) ||
+            rooms.popWhere("clientId", clientId(user_id, "Invites", room_id))
+
+        if (old_room) {
+            display_name = old_room.displayName
+            avatar_url   = old_room.avatarUrl
+            topic        = old_room.topic
+            inviter      = old_room.topic
+        }
+    }
+
+    rooms.upsert("clientId", client_id , {
+        "clientId":      client_id,
+        "userId":        user_id,
+        "category":      category,
+        "roomId":        room_id,
+        "displayName":   display_name,
+        "avatarUrl":     avatar_url,
+        "topic":         topic,
+        "lastEventDate": last_event_date,
+        "inviter":       inviter,
+        "leftEvent":     left_event
+    })
+    //print("room up", rooms.toJson())
+}
+
+
+function onRoomDeleted(user_id, category, room_id) {
+    var client_id = clientId(user_id, category, room_id)
+    return models.rooms.popWhere("clientId", client_id, 1)
+}
+
+
+function onRoomMemberUpdated(room_id, user_id, typing) {
+}
+
+
+function onRoomMemberDeleted(room_id, user_id) {
+}

src/qml/EventHandlers/users.js

@@ -0,0 +1,24 @@
+function onAccountUpdated(user_id) {
+    models.accounts.append({"userId": user_id})
+}
+
+function AccountDeleted(user_id) {
+    models.accounts.popWhere("userId", user_id, 1)
+}
+
+function onUserUpdated(user_id, display_name, avatar_url, status_message) {
+    models.users.upsert("userId", user_id, {
+        "userId":        user_id,
+        "displayName":   display_name,
+        "avatarUrl":     avatar_url,
+        "statusMessage": status_message
+    })
+
+}
+
+function onDeviceUpdated(user_id, device_id, ed25519_key, trust, display_name,
+                         last_seen_ip, last_seen_date) {
+}
+
+function onDeviceDeleted(user_id, device_id) {
+}