suppress some unneeded messages, only transport messages when triggered by...

suppress some unneeded messages, only transport messages when triggered by username (from matrix side) or callphrase (from minetest side) as prefix

callback.lua

 -- This file is licensed under the terms of the BSD 2-clause license.
 -- See LICENSE.txt for details.
 
+--[[
 minetest.register_on_joinplayer(function(player)
   local name = player:get_player_name()
   if matrix.connected then --and matrix.config.send_join_part then
@@ -15,6 +16,7 @@ minetest.register_on_leaveplayer(function(player, timed_out)
         (timed_out and " (Timed out)" or ""))
   end
 end)
+]]--
 
 minetest.register_on_chat_message(function(name, message)
   if not matrix.connected
@@ -24,11 +26,18 @@ minetest.register_on_chat_message(function(name, message)
      or (not minetest.check_player_privs(name, {shout=true})) then
     return
   end
+
+
+  message = trim(message)
+  local prefixlen = string.len(matrix.config.callphrase) + 1
+  local prefix = string.sub( string.lower(message), 1, prefixlen)
+  if prefix == string.lower(matrix.config.callphrase.." ") then
     local nl = message:find("\n", 1, true)
     if nl then
       message = message:sub(1, nl - 1)
     end
-  matrix.say("<"..name.."> "..message)
+    matrix.say("<"..name..">  "..string.sub(message, prefixlen+1))
+  end
 end)
 
 minetest.register_on_shutdown(function()

config.lua

@@ -30,3 +30,4 @@ setting("string", "user", nil, true)      -- User name, fe @digbot:matrix.org
 setting("string", "server", nil, true)            -- Server address to connect to
 setting("string", "room_id", nil, true)           -- Channel to join (not needed?)
 setting("string", "password", nil, true)          -- Server password
+setting("string", "callphrase", "@matrix", true)  -- Prefix that triggers transporting messages to the matrix side.

init.lua

@@ -27,6 +27,10 @@ matrix = {
 dofile(modpath.."/config.lua")
 dofile(modpath.."/debug.lua")
 
+function trim(s)
+  return s:match("^%s*(.-)%s*$")
+end
+
 -- Temporarily set require so that LuaIRC can access it
 local old_require = require
 require = ie.require
@@ -67,21 +71,21 @@ end):hook("joined", function (client, room)
 
   room:hook("message", function (room, sender, message, event)
     if event.origin_server_ts < start_ts then
-      eprintf("%s: (Skipping message sent before bot startup)\n", room)
+      --eprintf("%s: (Skipping message sent before bot startup)\n", room)
       return
     end
     if sender == room.client.user_id then
-      eprintf("%s: (Skipping message sent by ourselves)\n", room)
+      --eprintf("%s: (Skipping message sent by ourselves)\n", room)
       return
     end
     if message.msgtype ~= "m.text" then
-      eprintf("%s: (Message of type %s ignored)\n", room, message.msgtype)
+      --eprintf("%s: (Message of type %s ignored)\n", room, message.msgtype)
       return
     end
 
-    eprintf("%s: <%s> %s\n", room, sender, message.body)
+    --eprintf("%s: <%s> %s\n", room, sender, message.body)
 
-    if message.body == "!bot quit" then
+    --[[if message.body == "!bot quit" then
       for _, room in pairs(client.rooms) do
         room:send_text("(gracefully shutting down)")
       end
@@ -89,6 +93,13 @@ end):hook("joined", function (client, room)
       matrix.connected = false
     elseif room.room_id == matrix.config.room_id then
       minetest.chat_send_all("<"..sender.."> "..message.body)
+    end]]--
+
+    message.body = trim(message.body)
+    local prefixlen = string.len(matrix.config.user) + 1
+    local prefix = string.sub( string.lower(message.body), 1, prefixlen)
+    if prefix == string.lower(matrix.config.user.." ") then
+      minetest.chat_send_all("<"..sender..">  "..string.sub(message.body, prefixlen+1))
     end
   end)
 end)
@@ -126,7 +137,7 @@ function matrix.connect()
   client:login_with_password(matrix.config.user, matrix.config.password, true)
   matrix.connected = true
   minetest.log("action", "Matrix: Connected!")
-  minetest.chat_send_all("Matrix: Connected!")
+  --minetest.chat_send_all("Matrix: Connected!")
 end