extensions.js

;(function($) {
  $.fn.extend({
    getID: function() {
      return parseInt($(this).attr("id").match(/\d+/)[0]);
    },
    setInputHint: function() {
      if ($(this).length > 1) {
        $(this).each(function() { 
          $(this).setInputHint(); 
        });
      } else {
        var el = $(this);
        el._default = el.val();

        el.focus(function() {
          if(el._default != el.val()) return;
          el.removeClass('hint').val('');
        })
        .blur(function() {
          if($.trim(el.val()) != '') return;
          el.addClass('hint').val(el._default);
        })
        .addClass('hint');
      }
    },
    addSelector: function(selector) {
      var classes = selector.split('.'), 
          $this = $(this);
      $.each(classes, function(i, c) {
        if (c.match(/^#/)) {
          $this.attr('id', c.replace('#',''));
        } else {
          $this.addClass(c);
        }
      });
      return $this;
    },
    findOrAppend: function(selector, element) {
      var $this = $(this), 
          $el = $this.find(selector);
      if ($el.length > 0) return $el; 
      // el doesnt exist so lets make it
      if (typeof element == 'undefined') {
        // figure out how to build the element from the selector
        var parts = selector.split(' ');
        $el = $("<div>");
        if (parts.length == 1) {
          // single selector so just added
          $el.addSelector(selector);
        } else {
          // selector with multiple depth so we just want the last selector
          $el.addSelector(parts.pop());
          // find this down the parts
          $this = $this.findOrAppend(parts.join(' '));
        }
      } else {
        // we provided a specific element
        $el = $(element);
      }
      // append it
      $this.append($el);
      // return it
      return $el;
    },
    soon: function(callback, when) {
      var context = this, wrapped_callback = function() {
        callback.apply(context);
      };
      setTimeout(wrapped_callback, when || 200);
      return context;
    },
    slideTo: function(speed) {
      var top = $(this).offset().top;
      $('body,html').animate({'scrollTop': top + 'px'}, speed);
    }
  });

  $.extend({
    log: function()	{
      if ($.data(document, 'debug.log') == true) {
        if (typeof window.console != 'undefined') {
          window.console.log.apply(window.console, arguments);
        } else if (typeof console != 'undefined') {
          console.log.apply(this, arguments);
        } else {
          // do nothing
        }
      }
    },
    // like prototype.js's bind()
    shove: function(fn, object) {
      return function() {
        return fn.apply(object, arguments);
      }
    },

    // is val blank?
    blank: function(val) {
      return !val || val === '' || !val.match(/\w+/);
    },

    timestamp: function() {
      return Math.floor(new Date().getTime()/1000);
    },
    
    togglePush: function(first, second) {
      var index = $.inArray(second, first);
      index != -1 ? 
        first.splice(index, 1) :
        first.push(second)
      return first;
    },
    
    // backport param from trunk
    param: function( a ) {
      var s = [],
      param_traditional = jQuery.param.traditional;

      function add( key, value ){
        // If value is a function, invoke it and return its value
        value = jQuery.isFunction(value) ? value() : value;
        s[ s.length ] = encodeURIComponent(key) + '=' + encodeURIComponent(value);
      }

      // If an array was passed in, assume that it is an array
      // of form elements
      if ( jQuery.isArray(a) || a.jquery )
        // Serialize the form elements
        jQuery.each( a, function() {
          add( this.name, this.value );
        });

      else
        // Encode parameters from object, recursively. If
        // jQuery.param.traditional is set, encode the "old" way
        // (the way 1.3.2 or older did it)
        jQuery.each( a, function buildParams( prefix, obj ) {

          if ( jQuery.isArray(obj) )
            jQuery.each( obj, function(i,v){
              // Due to rails' limited request param syntax, numeric array
              // indices are not supported. To avoid serialization ambiguity
              // issues, serialized arrays can only contain scalar values. php
              // does not have this issue, but we should go with the lowest
              // common denominator
              add( prefix + ( param_traditional ? "" : "[]" ), v );
            });

          else if ( typeof obj == "object" )
            if ( param_traditional )
              add( prefix, obj );

            else
              jQuery.each( obj, function(k,v){
                buildParams( prefix ? prefix + "[" + k + "]" : k, v );
              });
      
          else
            add( prefix, obj );

        });

      // Return the resulting serialization
      return s.join("&").replace('%20', "+");
    }
  });
  
})(jQuery);