feat: add log buffer, draw on screen manually

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

@@ -47,25 +47,16 @@ local logTypes = {
     }
 }
 local log = {}
+log.buffer = {}
 
 for typeName, format in pairs(logTypes) do
     log[typeName] = function(fmt, ...)
-        local prevColourBg = term.getBackgroundColour()
-        local prevColourFg = term.getTextColour()
+        local entry = {
+            message = string.format(fmt, ...),
+            type = typeName
+        }
 
-        term.setBackgroundColour(format["BG"])
-        term.setTextColour(format["FG"])
-        io.write(("[%s @ line %d]"):format(typeName, debug.getinfo(2, "l").currentline))
-
-        if format["AffectContent"] then
-            io.write(" ", string.format(fmt, ...), "\n")
-            term.setBackgroundColour(prevColourBg)
-            term.setTextColour(prevColourFg)
-        else
-            term.setBackgroundColour(prevColourBg)
-            term.setTextColour(prevColourFg)
-            io.write(" ", string.format(fmt, ...), "\n")
-        end
+        table.insert(log.buffer, entry)
     end
 end
 
@@ -104,27 +95,6 @@ function sendToAll(name, msgData)
     modem.transmit(0, 0, message)
 end
 
---[[
-    event handling
-]]
-local eventListeners = {}
-local function registerEventListener(name, listener)
-    if not eventListeners[name] then eventListeners[name] = {} end
-    table.insert(eventListeners[name], listener)
-end
-
-local function dispatchEvents(event, ...)
-    log.info("dispatching event: %s", event)
-
-    local eventTbl = eventListeners[event]
-
-    if not eventTbl then return end
-
-    for i = 1, #eventTbl, 1 do
-        eventTbl[i](...)
-    end
-end
-
 --[[
     command handling
 ]]
@@ -154,10 +124,27 @@ declareCommandHandler("SCAN", handleScan,
         ["fuel"] = "number"
     })
 
-
 --[[
-    modem message handler
+    event handling
 ]]
+local eventListeners = {}
+local function registerEventListener(name, listener)
+    if not eventListeners[name] then eventListeners[name] = {} end
+    table.insert(eventListeners[name], listener)
+end
+
+local function dispatchEvents(event, ...)
+    log.info("dispatching event: %s", event)
+
+    local eventTbl = eventListeners[event]
+
+    if not eventTbl then return end
+
+    for i = 1, #eventTbl, 1 do
+        eventTbl[i](...)
+    end
+end
+
 local function handleMessages(side, channel, replyChannel, message, dist)
     if channel ~= HOST_CHANNEL then return end
 
@@ -190,20 +177,21 @@ local function handleMessages(side, channel, replyChannel, message, dist)
     if not success then
         log.error("error occurred while executing command %s: %s", message.name, err)
     end
+
+    log.info("processed command (%s)", message.name)
 end
 registerEventListener("modem_message", handleMessages)
 
 --[[
     main
 ]]
-log.general("tutel host init")
+-- log.general("tutel host init")
 
 -- transmit scan
-log.info("broadcasting SCAN")
-sendToAll("SCAN", { ["hostChannel"] = HOST_CHANNEL })
+-- log.info("broadcasting SCAN")
 
 --[[
-    loop functions
+    screen drawing
 ]]
 function updateScreen()
     local w, h = term.getSize()
@@ -223,8 +211,41 @@ function updateScreen()
     term.setTextColour(colors.black)
     term.clearLine()
     drawTextCentered("tutel host controller")
+
+    local function drawLogs(startY, endY)
+        for i = #log.buffer, 1, -1 do
+            if i > endY then break end
+
+            local entry = log.buffer[i]
+            local format = logFormats[entry.type]
+
+            term.setCursorPos(startY + i)
+
+            local prevColourBg = term.getBackgroundColour()
+            local prevColourFg = term.getTextColour()
+
+            term.setBackgroundColour(format["BG"])
+            term.setTextColour(format["FG"])
+            term.write(("[%s]"):format(entry.type))
+
+            if format["AffectContent"] then
+                term.write((" %s\n"):format(entry.message))
+                term.setBackgroundColour(prevColourBg)
+                term.setTextColour(prevColourFg)
+            else
+                term.setBackgroundColour(prevColourBg)
+                term.setTextColour(prevColourFg)
+                term.write((" %s\n"):format(entry.message))
+            end
+        end
+    end
+
+    drawLogs(2, w - 1)
 end
 
+--[[
+    event polling
+]]
 function pollEvents()
     local eventData = { os.pullEvent() }
 
@@ -234,6 +255,11 @@ function pollEvents()
     dispatchEvents(eventName, table.unpack(eventData))
 end
 
+--[[
+    main loop
+]]
+sendToAll("SCAN", { ["hostChannel"] = HOST_CHANNEL })
 while true do
     pollEvents()
+    updateScreen()
 end