Update image list to fetch images from GitHub

src/coffee/models/markdown_image.coffee

@@ -6,26 +6,39 @@ All rights reserved.
 ###
 
 BaseModel = require './base_model'
+_         = require 'underscore'
 {Event}   = require '../constants'
 
 ########################################################################################################################
 
 module.exports = class MarkdownImage extends BaseModel
 
-    @MIMETYPES = [
-        {patern:/\.png$/i, text:'image/png'}
-        {patern:/\.gif$/i, text:'image/gif'}
-        {patern:/\.jpg$/i, text:'image/jpeg'}
-        {patern:/\.jpeg$/i, text:'image/jpeg'}
+    @MimeTypes = MimeTypes = [
+        {pattern:/\.png$/i,  text:'image/png'}
+        {pattern:/\.gif$/i,  text:'image/gif'}
+        {pattern:/\.jpg$/i,  text:'image/jpeg'}
+        {pattern:/\.jpeg$/i, text:'image/jpeg'}
     ]
 
+    @Status = Status = {
+        'unknown':    'unknown'
+        'checking':   'checking'
+        'empty':      'empty'
+        'creatable':  'creatable'
+        'unchanged':  'unchanged'
+        'updateable': 'updatable'
+    }
+
     constructor: (attributes={}, options={})->
         attributes.encodedData ?= null
         attributes.fileName    ?= ''
         attributes.path        ?= ''
         attributes.sha         ?= null
+        attributes.status      ?= Status.unknown
         super
 
+        @client = options.client
+
         @on Event.change + ':fileName', => @_mimeType = null
 
     # Property Methods #############################################################################
@@ -35,7 +48,7 @@ module.exports = class MarkdownImage extends BaseModel
 
     getMimeType: ->
         if not @_mimeType?
-            for mimeType in MarkdownImage.MIMETYPES
+            for mimeType in MimeTypes
                 if mimeType.pattern.test @fileName
                     @_mimeType = mimeType.text
                     break
@@ -44,3 +57,19 @@ module.exports = class MarkdownImage extends BaseModel
 
     Object.defineProperties @prototype,
         fullPath: {get:@prototype.getFullPath}
+        mimeType: {get:@prototype.getMimeType}
+
+    # BaseModel Overrides ##########################################################################
+
+    fetch: ->
+        if not @client? then throw new Error 'MarkdownImage must be given a client to fetch with'
+
+        @status = Status.checking
+        @client.fetchFile path:@fullPath
+            .then (response)=>
+                data = response.json.data
+
+                if data.sha?
+                    @set encodedData:data.content, sha:data.sha, status:Status.unchanged
+                else
+                    @status = Status.empty

src/coffee/models/markdown_image_list.coffee

@@ -14,14 +14,27 @@ MarkdownImage = require './markdown_image'
 module.exports = class MarkdownImageList extends BaseModel
 
     constructor: (attributes={}, options={})->
+        attributes.imageBase    ?= ''
         attributes.markdownText ?= null
         super attributes, options
 
+        @client = options.client
         @_images = {}
 
+        @on Event.change + ':imageBase', =>
+            for fileName, image of @_images
+                image.path = @imageBase
+
         @on Event.change + ':markdownText', => @_analyzeMarkdownText()
         @_analyzeMarkdownText()
 
+    # Public Methods ###############################################################################
+
+    loadImages: ->
+        for fileName, image of @_images
+            if image.status is MarkdownImage.Status.unknown
+                image.fetch()
+
     # Property Methods #############################################################################
 
     getAll: ->
@@ -50,7 +63,7 @@ module.exports = class MarkdownImageList extends BaseModel
                 fileName = match[2]
                 image = @_images[fileName]
                 if not image?
-                    image = new MarkdownImage fileName:fileName
+                    image = new MarkdownImage {fileName:fileName, path:@imageBase}, {client:@client}
                     @trigger Event.add, this, image
                     changed = true