fix: handle modem messages

lua/CC Tweaked/tutel/tutel-host.lua

@@ -161,38 +161,40 @@ declareCommandHandler("SCAN", handleScan,
 local function handleMessages(side, channel, replyChannel, message, dist)
     if channel ~= HOST_CHANNEL then return end
 
+    -- msg validation
     if type(message) ~= "table" then return end
     if not message.header or message.header ~= MSG_HEADER then return end
     if not message.data then message.data = {} end
+
+    -- cmd validation
+    if not message.name then
+        log.warning("received nameless command?")
+        return
     end
+
+    if not commands[message.name] then
+        log.error("unhandled command (%s)", message.name)
+        return
+    end
+
+    local cmd = commands[message.name]
+    for i, v in pairs(cmd.keys) do
+        if type(message.data[i]) ~= v and v ~= "optional" then
+            log.error("command %s requires key %s of type %s (was %s)", message.name, i, v, type(message[i]))
+            return
+        end
+    end
+
+    -- cmd execution
+    local success, err = pcall(cmd.handler, message.data, message.id)
+    if not success then
+        log.error("error occurred while executing command %s: %s", message.name, err)
+    end
+end
+declareCommandHandler("modem_message", handleMessages)
 --[[
     main
 ]]
--- function pollAndProcessMessages()
---     -- command validation
---     if not message.name then
---         log.warning("received nameless message")
---         return
---     end
-
---     if not commands[message.name] then
---         log.error("unhandled message (%s)", message.name)
---         return
---     end
-
---     local cmd = commands[message.name]
---     for i, v in pairs(cmd.keys) do
---         if type(message.data[i]) ~= v and v ~= "optional" then
---             log.error("command %s requires key %s of type %s (was %s)", message.name, i, v, type(message[i]))
---             return
---         end
---     end
-
---     cmd.handler(message.data, message.id)
-
---     -- message handling
---     log.info("received command (%s)", message.name)
--- end
 
 log.general("tutel host init")