added documentation for difficulty selector code

src/core/Global.ttslua

@@ -25,6 +25,7 @@ local NOT_INTERACTABLE = {
 local chaosTokens = {}
 local chaosTokensLastMat = nil
 local IS_RESHUFFLING = false
+
 ---------------------------------------------------------
 -- data for tokens
 ---------------------------------------------------------
@@ -233,11 +234,10 @@ function returnChaosTokens()
 end
 
 function drawChaostoken(params)
-  findChaosBag()
-
   local mat = params[1]
   local tokenOffset = params[2]
   local isRightClick = params[3]
+  findChaosBag()
 
   -- return token(s) on other playmat first
   if chaosTokensLastMat ~= nil and chaosTokensLastMat ~= mat and #chaosTokens ~= 0 then
@@ -368,6 +368,9 @@ end
 -- Difficulty selector script
 ---------------------------------------------------------
 
+-- called for button creation on the difficulty selectors
+---@param object object Usually "self"
+---@param key string Name of the scenario
 function createSetupButtons(args)
   local data = getDataValue('modeData', args.key)
   if data ~= nil then
@@ -415,6 +418,10 @@ function createSetupButtons(args)
   end
 end
 
+-- called for adding chaos tokens
+---@param object object Usually "self"
+---@param key string Name of the scenario
+---@param mode string diffculty (e.g. "hard" or "expert")
 function fillContainer(args)
   findChaosBag()
 
@@ -464,8 +471,13 @@ function fillContainer(args)
       end
     end
 
-    if value.message then broadcastToAll(value.message) end
-    if value.warning then broadcastToAll(value.warning, { 1, 0.5, 0.5 }) end
+    if value.message then
+      broadcastToAll(value.message)
+    end
+
+    if value.warning then
+      broadcastToAll(value.warning, { 1, 0.5, 0.5 })
+    end
   end
 end
 
@@ -509,13 +521,14 @@ function spawnChaosToken(id, pos)
   end
 end
 
--- chaos bag needs this!
+-- chaos bag needs this for renaming chaos tokens
 function getTokenName(params)
   local name = IMAGE_TOKEN_MAP[params.url]
     if name == nil then name = "" end
   return name
 end
 
+-- returns the image url for a chaos token (identified by the "id")
 function getChaosTokenImageURL(id)
   if id == 'p1' then return 'https://i.imgur.com/uIx8jbY.png' end
   if id == '0' then return 'https://i.imgur.com/btEtVfd.png' end