a simple model for mapping closed issues into a chart

README.md

@@ -3,10 +3,6 @@
 
 [ ![Codeship Status for radekstepan/github-burndown-chart](https://www.codeship.io/projects/d69f4420-e5b0-0130-bbae-1632ddfb80f8/status?branch=rework)](https://www.codeship.io/projects/5855)
 
-##Next
-
-Map closed tasks to a range of dates while maintaining the points remaining stats.
-
 ##Project Charter
 
 The app is to display a burndown chart from a set of GitHub issues in a milestone.

src/chart.coffee

@@ -0,0 +1,9 @@
+#!/usr/bin/env coffee
+{ _ } = require 'lodash'
+
+module.exports =    
+    # Map closed issues ready to be visualized.
+    # Assumes collection has been `filter`ed and is ordered.
+    'closed': (collection, total, cb) ->
+        cb null, _.map collection, ({ closed_at, size }) ->
+            { x: +new Date(closed_at), y: total -= size }

src/issues.coffee

@@ -4,6 +4,7 @@ async = require 'async'
 
 req   = require './request'
 reg   = require './regex'
+dates = require './dates'
 
 module.exports =
     # Used on an initial fetch of issues for a repo.

test/chart.coffee

@@ -0,0 +1,20 @@
+#!/usr/bin/env coffee
+assert = require 'assert'
+path   = require 'path'
+
+chart = require path.resolve __dirname, '../src/chart.coffee'
+
+module.exports =
+    'chartize closed issues': (done) ->
+        a = { number: 2, closed_at: '2013-05-09T09:04:53Z', size: 6 }
+        b = { number: 1, closed_at: '2013-05-09T10:04:53Z', size: 4 }
+        c = { number: 3, closed_at: '2013-05-12T09:04:53Z', size: 2 }
+
+        chart.closed [ a, b, c ], 20, (err, data) ->
+            assert.ifError err
+            assert.deepEqual data, [
+                { x: 1368090293000, y: 14 }
+                { x: 1368093893000, y: 10 }
+                { x: 1368349493000, y: 8  }
+            ]
+            done.call null