Merge Commit

.travis.yml

@@ -2,6 +2,9 @@ language: node_js
 node_js:
   - '4'
   - '5'
+  - '6'
+  - '7'
+  - '8'
 env:
   - CXX=g++-4.8
 script: npm test

README.md

@@ -75,11 +75,20 @@ Once all steps are added, This method is used to generate the output of all thes
 modules.
 
 ```js
-sequencer.run()
+sequencer.run();
 ```
 
 Additionally, an optional callback can be passed to this method.
 
+```js
+sequencer.run(function(out){
+  // this gets called back.
+  // "out" is the DataURL of the final image.
+});
+```
+
+return value: **`sequencer`** (To allow method chaining)
+
 
 ### Removing a step from the sequencer
 
@@ -205,8 +214,9 @@ sequencer.run(image_name,from); //Image 'image' from 'from'
 The `run` method also accepts an optional callback just like before:
 
 ```js
-  sequencer.run(image_name,from,function(){
+  sequencer.run(image_name,from,function(out){
     // This gets called back.
+    // "out" is the DataURL of final image.
   });
 ```
 
@@ -220,6 +230,9 @@ sequencer.run({
 });
 ```
 
+return value: **`sequencer`** (To allow method chaining)
+
+
 ### Removing Steps from an Image
 
 Similarly, `removeSteps` can also accept an `image_name` parameter. Either, both,

package.json

@@ -39,7 +39,7 @@
     "matchdep": "^0.3.0",
     "plotly.js": "~1.21.2",
     "save-pixels": "~2.3.4",
-    "tape": "^3.5.0"
+    "tape": ">=4.7.0"
   },
   "homepage": "https://github.com/publiclab/image-sequencer"
 }

src/ImageSequencer.js

@@ -115,6 +115,8 @@ ImageSequencer = function ImageSequencer(options) {
     json_q = formatInput.call(this,args,"r");
 
     require('./Run')(this, json_q, callback);
+
+    return this;
   }
 
   function loadImages() {

src/Run.js

@@ -1,7 +1,14 @@
 function Run(ref, json_q, callback) {
   function drawStep(drawarray,pos) {
-    if(pos==drawarray.length) if(ref.objTypeOf(callback)=='Function') callback();
-    if(pos>=drawarray.length) return true;
+    if(pos==drawarray.length) {
+      image = drawarray[pos-1].image;
+      if(ref.objTypeOf(callback)=='Function'){
+        steps = ref.images[image].steps;
+        out = steps[steps.length-1].output.src;
+        callback(out);
+        return;
+      }
+    }
     image = drawarray[pos].image;
     i = drawarray[pos].i;
     input = ref.images[image].steps[i-1].output;

test/image-sequencer.js

@@ -103,8 +103,10 @@ test('insertSteps({image: {index: index, name: "module", o: options} }) inserts
   t.end();
 });
 
-test('run() runs the sequencer', function (t) {
-  sequencer.run();
+test('run() runs the sequencer and returns output to callback', function (t) {
+  sequencer.run(function(out){
     t.equal(typeof(sequencer.images.test.steps[sequencer.images.test.steps.length - 1].output), "object", "It Does!");
+    t.equal(out,sequencer.images.test.steps[sequencer.images.test.steps.length - 1].output.src, "It Does!");
+  });
   t.end();
 });