can fetch and display Matrix messages in-game

init.lua

@@ -16,6 +16,38 @@ local txid  = 0
 -- used for msync()
 local since = nil
 
+-- accepts list of events
+local function mchat(data)
+    if data == nil then
+        return
+    end
+    -- lets just get this working
+    if data["rooms"] == nil then
+        return
+    end
+    if data["rooms"]["join"] == nil then
+        return
+    end
+    if data["rooms"]["join"][MATRIX_ROOM] == nil then
+        return
+    end
+    if data["rooms"]["join"][MATRIX_ROOM]["timeline"] == nil then
+        return
+    else
+        local events = data["rooms"]["join"][MATRIX_ROOM]["timeline"]["events"]
+        if events == nil then
+            return
+        end
+        for i, event in ipairs(events) do
+            if event.type == "m.room.message" 
+            and event.sender ~= MATRIX_USERNAME_LONG then
+                local message = event.sender .. ": " .. event.content.body
+                minetest.chat_send_all(message)
+            end
+        end
+    end
+end
+
 local function msync()
 -- optimization note: request more recent instead of unfiltered req
 --     local param1 = '&filter={\"room\":{\"timeline\":{\"limit\":1}}}'
@@ -25,16 +57,22 @@ local function msync()
     if since == nil then -- first time sync
         -- do nothing for now
     else -- second time sync -> append since parameter
-        u = u + "&since="..since
+        u = u .. "&since="..since
     end
     http.fetch({url=u}, 
         function (res) 
-            if res == nil then
-                print("Matrix - sync response is nil")
+            if res == nil then -- received nothing from server
+                minetest.log("error", "matrix_bridge - sync response is nil")
+            elseif res.code == 0 then
+                minetest.log("info", "matrix_bridge - not found / timeout")
+            elseif res.code == 404 then
+                minetest.log("info", "matrix_bridge - 404")
             else
                 local response = minetest.parse_json(res.data)
-                since = response.next_batch
-                minetest.log("action", "sync state:" .. since)
+                if response ~= nil then
+                    since = response.next_batch
+                    mchat(response)
+                end
             end
         end
     )
@@ -87,7 +125,9 @@ end
 -- 	end
 -- end)
 
-
+minetest.register_globalstep(function()
+    msync()
+end)
 
 minetest.register_on_joinplayer(function(player)
 	local name = player:get_player_name()