couchdb/userdata/_design/heatmap/views/by_episode/map.js

   1 function(doc)
   2 {
   3     if(doc.doc_type == "EpisodeUserState")
   4     {
   5         if(doc.actions == null || doc.actions.length == 0)
   6         {
   7             return;
   8         }
   9
  10         function sortByStarted(a, b)
  11         {
  12             var x = a.started;
  13             var y = b.started;
  14             return ((x < y) ? -1 : ((x > y) ? 1 : 0));
  15         }
  16
  17         function hasTimeValues(action)
  18         {
  19             return ((action != null) && (action.started != null) && (action.playmark != null));
  20         }
  21
  22         var actions = doc.actions.slice(0); // creates a copy
  23         actions = actions.filter(hasTimeValues);
  24         actions.sort(sortByStarted);
  25
  26         var played_parts = [];
  27         var flat_date = null;
  28
  29         for(var n in actions)
  30         {
  31             var action = actions[n];
  32
  33             if(flat_date == null)
  34             {
  35                 flat_date = {start: action.started, end: action.playmark};
  36                 played_parts.push(flat_date);
  37                 continue;
  38             }
  39
  40             if(action.started <= flat_date.end && action.playmark >= flat_date.end)
  41             {
  42                 flat_date.end = action.playmark;
  43             }
  44             else if(action.started >= flat_date.start && action.playmark <= flat_date.end)
  45             {
  46                 // part already contained
  47                 continue;
  48             }
  49             else
  50             {
  51                 flat_date = {start: action.started, end: action.playmark};
  52                 played_parts.push(flat_date);
  53             }
  54         }
  55
  56         if (played_parts.length == 0)
  57         {
  58             return;
  59         }
  60
  61         var sections = [];
  62         for(var n in played_parts)
  63         {
  64             var part = played_parts[n];
  65             sections.push(part.start);
  66             sections.push(part.end);
  67         }
  68
  69         emit([doc.podcast, doc.episode, doc.user], sections);
  70     }
  71 }