WIP: Use rake to start compiling resources (like require.coffee)

src/app/file.coffee

@@ -0,0 +1,50 @@
+EventEmitter = require 'event-emitter'
+
+fs = require 'fs'
+_ = require 'underscore'
+
+module.exports =
+class File
+  path: null
+  md5: null
+
+  constructor: (@path) ->
+    throw "Creating file with path that is not a file: #{@path}" unless fs.isFile(@path)
+    @updateMd5()
+
+  setPath: (@path) ->
+
+  getPath: ->
+    @path
+
+  getBaseName: ->
+    fs.base(@path)
+
+  updateMd5: ->
+    @md5 = fs.md5ForPath(@path)
+
+  afterSubscribe: ->
+    @subscribeToNativeChangeEvents() if @subscriptionCount() == 1
+
+  afterUnsubscribe: ->
+    @unsubscribeFromNativeChangeEvents() if @subscriptionCount() == 0
+
+  subscribeToNativeChangeEvents: ->
+    @watchId = $native.watchPath @path, (eventType, path) =>
+      if eventType is "remove"
+        @trigger "remove"
+        @off()
+      else if eventType is "move"
+        @setPath(path)
+        @trigger "move"
+      else if eventType is "contents-change"
+        newMd5 = fs.md5ForPath(@getPath())
+        return if newMd5 == @md5
+
+        @md5 = newMd5
+        @trigger 'contents-change'
+
+  unsubscribeFromNativeChangeEvents: ->
+    $native.unwatchPath(@path, @watchId)
+
+_.extend File.prototype, EventEmitter