Wrote function to sync with matrix room

init.lua

@@ -1,3 +1,6 @@
+
+print("Matrix bridge loaded.")
+
 local modpath = minetest.get_modpath(minetest.get_current_modname())
 
 dofile(modpath.."/config.lua")
@@ -9,7 +12,53 @@ if http == nil then
 end
 
 local token = nil
-local txid = 0
+local txid  = 0
+-- used for msync()
+local since = nil
+
+local function msync()
+-- optimization note: request more recent instead of unfiltered req
+--     local param1 = '&filter={\"room\":{\"timeline\":{\"limit\":1}}}'
+    local param1 = "?access_token=" .. token
+    local param2 = "&full_state=false"
+    local u = MATRIX_SERVER.."/_matrix/client/r0/sync" .. param1 .. param2
+    if since == nil then -- first time sync
+        -- do nothing for now
+    else -- second time sync -> append since parameter
+        u = u + "&since="..since
+    end
+    http.fetch({url=u}, 
+        function (res) 
+            if res == nil then
+                print("Matrix - sync response is nil")
+            else
+                local response = minetest.parse_json(res.data)
+                since = response.next_batch
+                minetest.log("action", "sync state:" .. since)
+            end
+        end
+    )
+end
+
+local function mlogin()
+    local u = MATRIX_SERVER.."/_matrix/client/r0/login"
+    local d = '{"type":"m.login.password","password":"'..MATRIX_PASSWORD..'","identifier":{"type":"m.id.user","user":"'..MATRIX_USERNAME..'"}}'
+    local h = {"Content-Type: application/json"}
+    http.fetch({url=u, method="POST", extra_headers=h, data=d}, 
+        function(res)
+            if res.code == 200 then
+                minetest.log("action", res.data)
+                local data = minetest.parse_json(res.data)
+                token = data.access_token
+                minetest.log("action", "Matrix authenticated")
+                msync()
+            else
+                minetest.log("error", to_string(res))
+            end
+        end
+    )
+end
+mlogin()
 
 function send_message(msg)
 	txid = txid + 1
@@ -22,21 +71,23 @@ function send_message(msg)
 	end)
 end
 
-http.fetch({
-	url = MATRIX_SERVER.."/_matrix/client/r0/login",
-	method = "POST",
-	extra_headers = {"Content-Type: application/json"},
-	data = '{"type":"m.login.password","password":"'..MATRIX_PASSWORD..'","identifier":{"type":"m.id.user","user":"'..MATRIX_USERNAME..'"}}'
-}, function(res)
-	if res.code == 200 then
-		minetest.log("action", res.data)
-		local data = minetest.parse_json(res.data)
-		token = data.access_token
-		minetest.log("action", "Matrix authenticated")
-	else
-		minetest.log("error", to_string(res))
-	end
-end)
+-- http.fetch({
+-- 	url = MATRIX_SERVER.."/_matrix/client/r0/login",
+-- 	method = "POST",
+-- 	extra_headers = {"Content-Type: application/json"},
+-- 	data = '{"type":"m.login.password","password":"'..MATRIX_PASSWORD..'","identifier":{"type":"m.id.user","user":"'..MATRIX_USERNAME..'"}}'
+-- }, function(res)
+-- 	if res.code == 200 then
+-- 		minetest.log("action", res.data)
+-- 		local data = minetest.parse_json(res.data)
+-- 		token = data.access_token
+-- 		minetest.log("action", "Matrix authenticated")
+-- 	else
+-- 		minetest.log("error", to_string(res))
+-- 	end
+-- end)
+
+
 
 minetest.register_on_joinplayer(function(player)
 	local name = player:get_player_name()
@@ -66,3 +117,5 @@ minetest.register_on_chat_message(function(name, message)
 	end
 	send_message("<"..name.."> "..message)
 end)
+
+