// Stupid jQuery table plugin.



//http://joequery.github.com/Stupid-Table-Plugin/



// Call on a table 
// sortFns: Sort functions for your datatypes.
(function($){
  $.fn.stupidtable = function(sortFns){
    var table = this; sortFns = sortFns || {};

    // ==================================================== //
    //                  Utility functions                   //
    // ==================================================== //

    // Merge sort functions with some default sort functions.
    sortFns = $.extend({}, {
      "int":function(a,b){ return parseInt(a, 10) - parseInt(b, 10); },
      "float":function(a,b){ return parseFloat(a) - parseFloat(b); },
      "string":function(a,b){ if (a<b) return -1; if (a>b) return +1; return 0;}
    }, sortFns);

    // Array comparison. See http://stackoverflow.com/a/8618383
    var arrays_equal = function(a,b) { return !!a && !!b && !(a<b || b<a);}
    
    // Return the resulting indexes of a sort so we can apply
    // this result elsewhere. This returns an array of index numbers.
    // return[0] = x means "arr's 0th element is now at x"
    var sort_map =  function(arr, sort_function){
      var sorted = arr.slice(0).sort(sort_function); 
      var map = [];
      var index = 0;
      for(var i=0; i<arr.length; i++){
        index = $.inArray(arr[i], sorted);

        // If this index is already in the map, look for the next index.
        // This handles the case of duplicate entries.
        while($.inArray(index, map) != -1){
          index++;
        }
        map.push(index);
      }
      return map;
    }

    // Apply a sort map to the array. 
    var apply_sort_map = function(arr, map){
      var clone = arr.slice(0);
      for(var i=0; i<map.length; i++){
        newIndex = map[i];
        clone[newIndex] = arr[i];
      }
      return clone;
    }

    // Returns true if array is sorted, false otherwise.
    // Checks for both ascending and descending
    var is_sorted_array = function(arr, sort_function){
      var clone = arr.slice(0);
      var reversed = arr.slice(0).reverse();
      var sorted = arr.slice(0).sort(sort_function);

      // Check if the array is sorted in either direction.
      return arrays_equal(clone, sorted) || arrays_equal(reversed, sorted);
    }


   var what_order_sorted = function(data, sf, isa)
   {
      var tmp = [data[0], data[data.length - 1]];

      tmp.sort(sf);

      if(data[0] == tmp[0] || !isa)
      {
         return 'desc';
      }else{
         return 'asc';
      }
   }



    // ==================================================== //
    //                  Begin execution!                    //
    // ==================================================== //
    // Do sorting when THs are clicked

    table.delegate("th:not(.dontsort)", "click", function(){

   if($(this).text().replace(/ /g, '') == '')
   {
      // empty header, don't allow sorting
      return;
   }


      var trs = table.find("tbody tr");
      var i = $(this).index();
      var classes = $(this).attr("class");
      var type = null;

      if (classes){
        classes = classes.split(/\s+/);

        for(var j=0; j<classes.length; j++){
          if(classes[j].search("sort-type-") != -1){
            type = classes[j].replace('sort-', '');
            break;
          }
        }
        if(type){
          type = type.split('-')[1];
        }
        else{
          type = "string";
        }
      }


      // Don't attempt to sort if no data type
      //if(!type){return false;}


      var sortMethod = sortFns[type];


      // Gather the elements for this column
      column = [];

      // Push either the value of the 'data-order-by' attribute if specified
      // or just the text() value in this column to column[] for comparison.
      trs.each(function(index,tr){
        var e = $(tr).children().eq(i);
        var order_by = e.attr('data-order-by') || e.text();
	      column.push(order_by);
      });


      // If the column is already sorted, just reverse the order. The sort
      // map is just reversing the indexes.
      if(is_sorted_array(column, sortMethod)){
        column.reverse();
        var theMap = [];
        for(var i=column.length-1; i>=0; i--){
          theMap.push(i);
        }
      }else{
        // Get a sort map and apply to all rows
        theMap = sort_map(column, sortMethod);
      }


// remove old sort classes (on this and other columns)
$(this).parent().find('th').each(function()
{
   $(this).removeClass('sortasc sortdesc');
});

// what order are we sorting in?
var whatorder = what_order_sorted(column, sortMethod, is_sorted_array(column, sortMethod));

// set new sort class
$(this).addClass(whatorder == 'asc' ? 'sortasc' : 'sortdesc');





      var sortedTRs = $(apply_sort_map(trs, theMap));



      // Replace the content of tbody with the sortedTRs. Strangely (and
      // conveniently!) enough, .append accomplishes this for us.
      table.find("tbody").append(sortedTRs);

    });



// remove th icon if no header text
   $(this).find('th').each(function()
   {
      var hv = $(this).text().replace(/ /g, '');

      if(hv == '')
      {
         $(this).css('background-image', 'none');
      }
   });




  }
 })(jQuery);




$('table.sortable').each(function()
{
   var rows = $(this).find('tbody tr').length;

   if(rows > 1)
   {
      $(this).stupidtable();
   }else{
      $(this).removeClass('sortable');
   }
});