add logging module

.gitignore

@@ -2,4 +2,5 @@ factory.json
 node_modules/
 build/
 .env
-sigils-config.json
+sigils-config.json
+sigils-log.txt

computercraft/installer.lua

@@ -5,6 +5,7 @@ local files = {
   'sigils/controller.lua',
   'sigils/factory.lua',
   'sigils/filter.lua',
+  'sigils/logger.lua',
   'sigils/machine.lua',
   'sigils/pipe.lua',
   'sigils/transfer-calculator.lua',

computercraft/sigils.lua

@@ -3,6 +3,7 @@ local Factory = require('sigils.factory')
 local Pipe = require('sigils.pipe')
 local WebSocket = require('sigils.websocket')
 local Utils = require('sigils.utils')
+local Logging = require('sigils.logging')
 
 local DEFAULT_SERVER_URL = 'wss://sigils.fredchan.org'
 
@@ -50,6 +51,8 @@ local function init ()
   local factory
 
   local config = getConfig()
+  Logging.LOGGER:setLevel(config.logLevel or 1)
+  Logging.LOGGER:warn("test")
 
   -- if there's no existing json file, generate a factory from detected peripherals
   if factoryJsonFile == nil then

computercraft/sigils/logging.lua

@@ -0,0 +1,38 @@
+local Utils = require('sigils.utils')
+
+local f = fs.open(Utils.absolutePathTo('sigils-log.txt'), 'w')
+f.close()
+
+local LEVELS = {
+  DEBUG = 4,
+  INFO = 3,
+  WARN = 2,
+  ERROR = 1,
+  FATAL = 0,
+}
+
+local LOGGER = {
+  level = 1,
+}
+
+function LOGGER:writeLogLine(text)
+  local f = fs.open(Utils.absolutePathTo('sigils-log.txt'), 'a')
+  f.write(os.epoch('utc') .. " " .. text .. "\n")
+  f.close()
+end
+
+function LOGGER:setLevel (newLevel)
+  self.level = newLevel
+end
+
+function LOGGER:warn (text)
+  if self.level >= LEVELS.WARN then
+    print(text)
+    self:writeLogLine(text)
+  end
+end
+
+return {
+  LOGGER = LOGGER,
+  LEVELS = LEVELS,
+}

computercraft/sigils/pipe.lua

@@ -6,6 +6,7 @@
 
 local TransferCalculator = require('sigils.transfer-calculator')
 local Filter = require('sigils.filter')
+local LOGGER = require('sigils.logging').LOGGER
 
 local function processPipe (pipe, groupMap)
   local filter = Filter.getFilterFn(pipe.filter)
@@ -28,7 +29,7 @@ local function processPipe (pipe, groupMap)
     end
     parallel.waitForAll(unpack(coros))
   else
-    print('caught err', transferOrders)
+    LOGGER:warn("pipe.lua#processPipe() caught error " .. transferOrders)
   end
 end
 

computercraft/sigils/sigils-config.dist.json

@@ -1,4 +1,4 @@
 {
   "server": "wss://sigils.fredchan.org",
-  "verbose": false
+  "logLevel": 1
 }