sort on priority; need tests later on to verify

TODO.md

@@ -4,15 +4,7 @@
 
 - [ ] use Browserify as an app build pipeline
 - [ ] sort milestones on index and project page based on priority (most delayed first); Trend - actual = difference in days and those overdue come first
-
-1. in a projects collection observe the list prop and resort index; already sorted flag passed in as yes)
-1. The index is not already sorted when sort order changes
-1. index is a list ofls and its milestones in two loops to extract and sort using function
-1. tables loop index getting the obj from projects collection and render
-1. sort order link toggles available sort by keys and changes the current key
-1. use while loop and pop when resetting the index
-1. third number in tuples be the priority number so we can insert into already sorted
-1. leave the code open so we can remove a project or milestone later on
+- [ ] sort on name using https://github.com/npm/node-semver/blob/master/semver.js if detected
 
 ###Git
 

src/models/projects.coffee

@@ -12,7 +12,7 @@ module.exports = new Model
   'name': 'models/projects'
 
   'data':
-    'sortBy': 'progress'
+    'sortBy': 'priority'
 
   # Return a sort order comparator.
   comparator: ->
@@ -23,17 +23,34 @@ module.exports = new Model
       ([ i, j ], b) =>
         fn list[i].milestones[j], b
 
+    # Set default fields, in place.
+    defaults = (arr, hash) ->
+      for item in arr
+        for k, v of hash
+          ref = item
+          for p, i in keys = k.split '.'
+            if i is keys.length - 1
+              ref[p] ?= v
+            else
+              ref = ref[p] ?= {}
+
+    # The actual fn selection.
     switch sortBy
       # From highest progress points.
       when 'progress' then deIdx (a, b) ->
-        $ = { 'progress': { 'points': 0 } }
-        a.stats ?= $ ; b.progress ?= $
-
+        defaults [ a, b ], { 'stats.progress.points': 0 }
+        # Simple points difference.
         a.stats.progress.points - b.stats.progress.points
 
       # From most delayed in days.
       when 'priority' then deIdx (a, b) ->
-        throw 'Not implemented'
+        # Milestones with no deadline are always at the "beginning".
+        defaults [ a, b ], { 'stats.progress.time': 0, 'stats.days': 1e3 }
+        # % difference in progress times the number of days ahead or behind.
+        [ $a, $b ] = _.map [ a, b ], ({ stats }) ->
+          (stats.progress.points - stats.progress.time) * stats.days
+
+        $b - $a
 
       # The "whatever" sort order...
       else -> 0

src/modules/stats.coffee

@@ -20,7 +20,7 @@ module.exports = (milestone) ->
     time = progress b - a, c - b
 
     # How many days is 1% of the time?
-    days = (moment(a).diff(moment(b), 'days')) / 100
+    days = (moment(b).diff(moment(a), 'days')) / 100
 
     {
       'isOnTime': points > time