add resize and crop option

lib/imager.js

@@ -100,6 +100,15 @@ Imager.prototype.startUpload = function (file, filename, variant, iteratorCallba
     })
   }
 
+  if (variants.resizeAndCrop) {
+    Object.keys(variants.resizeAndCrop).forEach(function (name) {
+      var processFiles = function (cb) {
+        self.resizeAndCropFile(file, { name: name, type: variants.resizeAndCrop[name] }, filename, cb)
+      }
+      asyncArr.push(processFiles)
+    })
+  }
+
   async.parallel(asyncArr, function (err, results) {
     if (err) console.log(err)
     var f = _.uniq(results).toString()
@@ -151,6 +160,27 @@ Imager.prototype.cropFile = function (file, preset, fname, cb) {
 }
 
 
+Imager.prototype.resizeAndCropFile = function (file, preset, fname, cb) {
+  var ct = { 'image/jpeg': '.jpg', 'image/png': '.png', 'image/gif': '.gif' }
+    , fileType = ct[file['type']]
+    , filename = fname + fileType
+    , self = this
+
+  var remoteFile = preset.name + '_' + filename
+    , dest = '/tmp/' + remoteFile
+
+  gm(file['path'])
+    .resize(preset.type.resize.split('x')[0], preset.type.resize.split('x')[1])
+    .gravity('Center')
+    .crop(preset.type.crop.split('x')[0], preset.type.crop.split('x')[1])
+    .write(dest, function(err) {
+      if (err) return cb(err)
+      self['pushTo' + self.storage](dest, remoteFile, filename, file['type'], cb)
+    }
+  )
+}
+
+
 Imager.prototype.pushToRackspace = function (file, remoteFile, filename, type, cb) {
   var self = this
     , client = cloudfiles.createClient(this.config['storage'][this.storage])