Add a thumbnail function and make gravity a parameter for resizeAndCrop

lib/imager.js

@@ -245,6 +245,20 @@ Imager.prototype = {
       });
     }
 
+    if (variant.thumbnail) {
+      Object.keys(variant.thumbnail).forEach(function (name) {
+        var processFiles = function (cb) {
+          var preset = {
+            name: name,
+            size: variant.thumbnail[name],
+            sep: variant.separator || '_'
+          };
+          self.thumbnail(file, preset, filename, cb);
+        };
+        asyncArr.push(processFiles);
+      });
+    }
+
     async.parallel(asyncArr, function (err, results) {
       var f = _.uniq(results).toString();
 
@@ -257,6 +271,55 @@ Imager.prototype = {
     });
   },
 
+  /**
+   * Create a thumbnail scaled and cut to fit
+   *
+   * @param {Object} file
+   * @param {Object} preset
+   * @param {String} filename
+   * @param {Function} cb
+   * @return {Imager}
+   * @api public
+   */
+
+  thumbnail: function(file, preset, filename, cb) {
+    console.log("Calling thumbnail")
+    var self = this;
+    var ct = file['type'] || file.headers['content-type'];
+    var remoteFile = preset.name + preset.sep + filename;
+    var tempFile = path.join(tempDir, 'imager_' +
+      Math.round(new Date().getTime()) + '_' +
+      Math.floor(Math.random() * 1000) + contentType[ct]);
+
+    var gravity = 'Center'
+    if (preset.size.indexOf(' ') > -1) {
+      gravity = preset.size.split(' ')[1];
+      preset.size = preset.size.split(' ')[0];
+    }
+
+    var w = preset.size.split('x')[0]
+    var h = preset.size.split('x')[1]
+
+    var cmd = gm(file['path'])
+      .autoOrient()
+      .command('convert')
+      .out('-thumbnail', w+'x'+h+'^')
+      .gravity(gravity)
+      .extent(w,h)
+      .write(tempFile, function (err) {
+        if (err) return cb(err);
+        async.each(self.storage, function (storage, cb) {
+          self['pushTo' + storage](tempFile, remoteFile, filename, ct, cb);
+        }, function (err) {
+          fs.unlink(tempFile, function (err) {
+            if (err) console.error(err);
+          });
+          if (err) cb(err);
+          else cb(null, filename);
+        });
+      });
+  },
+
   /**
    * Resize file
    *
@@ -355,10 +418,16 @@ Imager.prototype = {
       Math.round(new Date().getTime()) + '_' +
       Math.floor(Math.random() * 1000) + contentType[ct]);
 
+    var gravity = 'NorthWest'
+    if (preset.type.crop.indexOf(' ') > -1) {
+      gravity = preset.type.crop.split(' ')[1];
+      preset.type.crop = preset.type.crop.split(' ')[0];
+    }
+
     gm(file['path'])
       .autoOrient()
       .resize(preset.type.resize.split('x')[0], preset.type.resize.split('x')[1])
-      .gravity('Center')
+      .gravity(gravity)
       .crop(preset.type.crop.split('x')[0], preset.type.crop.split('x')[1])
       .write(tempFile, function (err) {
         if (err) return cb(err);

test/imager.js

@@ -2,16 +2,24 @@
 module.exports = {
   variants: {
     items: {
-      // keepNames: true,
-      resize: {
-        mini : "300x200",
-        preview: "800x600"
+      rename: function (filename) {
+        return Date.now() + '_' + filename;
       },
-      crop: {
-        thumb: "200x200"
+      thumbnail: {
+        mini_thumb_center: "160x160",
+        medium_thumb_center: "360x360",
+        mini_thumb: "160x160 NorthWest",
+        medium_thumb: "360x360 NorthWest"
+      },
+      resize: {
+        original : "100%",
+        mini : "160x160",
+        medium : "360x360",
+        large : "640x640"
       },
       resizeAndCrop: {
-        large: {resize: "1000x1000", crop: "900x900"}
+        // mini_thumb : {crop: "160x160", resize: "480x480"},
+        // medium_thumb : {crop: "360x360", resize: "1080x1080"}
       }
     },