Obey "L" (repeats) parameter

Fixes #3

Acoustics.moon

@@ -1,8 +1,16 @@
 require "lfs"
 MspGlobals = require "MspGlobals"
 
-import MODULE_PATH from MspGlobals
+import MODULE_PATH, OPERATING_SYSTEM_TYPE from MspGlobals
 
+-- forward declare class, we'll need it
+local Acoustics
+
+-- default paramter values
+DEFAULT_VOLUME  = 100
+DEFAULT_REPEATS = 1
+
+-- search for sound files
 dosWildcardsToLuaPattern = (soundFile) ->
   suffix = soundFile\match("%.(%w+)$")
   if not suffix and not soundFile\find("%*$")
@@ -29,24 +37,44 @@ getSoundFiles = (completeSoundPath, soundType) ->
 
   return searchFiles(MODULE_PATH .. "sounds/" .. soundPath, soundFilePattern)
 
+-- handle sound finish events
+registerAnonymousEventHandler("sysSoundFinished", (_1, _2, soundFile) ->
+    soundFile = soundFile\sub 2 if OPERATING_SYSTEM_TYPE == "windows" and soundFile\starts "/"
+    soundObject = Acoustics.playingSoundFiles[soundFile]
+    if soundObject
+      Acoustics.playingSoundFiles[soundFile] = nil
+      soundObject\FinishedPlaying!
+)
+
+
+
+-- class declaration
 class Acoustics
   new: (completeSoundPath, properties={}) =>
     @completeSoundPath = completeSoundPath
-    
+
     for argShortName, argValue in pairs(properties)
       if argName = @@.ArgShortNamesToNames argShortName
         self[argName] = argValue
       else
         print "MSP: server sent an unknown argument type: " .. argShortName
 
     if @volume
-      @volume = tonumber(@volume) or 100
+      @volume = tonumber(@volume) or DEFAULT_VOLUME
       if @volume < 0
         @volume = 0
       elseif @volume > 100
         @volume = 100
     else
-      @volume = 100
+      @volume = DEFAULT_VOLUME
+
+    if @repeats
+      @repeats = tonumber(@repeats) or DEFAULT_REPEATS
+      @repeats = math.floor @repeats
+      if @repeats < 1 and @repeats != -1
+        @repeats = 1
+    else
+      @repeats = DEFAULT_REPEATS
 
     @url = @@defaultUrl if not @url and @@defaultUrl
 
@@ -56,7 +84,15 @@ class Acoustics
       @@defaulUrl = @url if @url
 
   Play: =>
-    playSoundFile(@files[math.random #@files], @volume) if @files and #@files > 0
+    fileToPlay = @files[math.random #@files]
+    @@playingSoundFiles[fileToPlay] = @
+    playSoundFile(fileToPlay, @volume) if @files and #@files > 0
+
+  FinishedPlaying: =>
+    @repeats -= 1 if @repeats != -1
+    @\Play! if @repeats == -1 or @repeats > 0
+
+  @playingSoundFiles = {}
 
   @ArgShortNamesToNames: (shortName) ->
     switch shortName