complex-class.js

;function Model(){
  this.selected = ko.observable(false);
  this.excluded = ko.observable(false);
  this.changed = ko.observable(false);
  this.detectChanges = ko.observable(true);
  this.deactivated = ko.observable(false);
};

Model.prototype.select = function(){ this.selected(true); };
Model.prototype.unselect = function(){ this.selected(false); };

Model.prototype.exclude = function(){ this.excluded(true); };
Model.prototype.include = function(){ this.excluded(false); };

Model.prototype.deactivate = function(){ this.deactivated(true); };
Model.prototype.activate = function(){ this.deactivated(false); };

Model.prototype.throwChangesTo = function(model){
  this.changed.subscribe(function(){
    if(model) model.changed(true);
  });
};

Model.prototype.detectChangesIn = function(followedProperties){
  var that = this;
  for(index in followedProperties){
    var property = followedProperties[index];
    this[property].subscribe(function(){
      if(that.detectChanges()) {
        that.changed(true);
      };
    });
  };
};

Model.prototype.getByIds = function(ids, resource, callback){
  var that = this;
  for(var index in ids){
    var id = ids[index];
    $.get_json(resource + id).done(function(data){
      that.insensibly(function(){
        callback(data);
      });
    });
  };
};

Model.prototype.getIds = function(collection){
  var ids = [];
  if(collection.constructor == "".constructor)
    collection = this[collection]();
  
  for(var index in collection){
    var item = collection[index];
    if(!item.excluded()) {
      ids.push(item.id());
    }
  };
  
  return ids;
};

Model.prototype.getValues = function(collection, field){
  var values = [];
  if(collection.constructor == "".constructor)
    collection = this[collection]();
  
  for(var index in collection){
    var item = collection[index];
    if(!item.excluded()) {
      values.push(item[field]());
    }
  };
  
  return values;
};

Model.prototype.insensibly = function(callback){
  var that = this;
  that.detectChanges(false);
  that.changed(false);
  that.excluded(false);
  callback();
  that.detectChanges(true);
};

Model.prototype.setResources = function(root, ctors)
{
  var that = this;
  if(!ctors) { ctors = {}; };
  
  this.save = function(){
    // saves all subresources
    for(var resource in ctors){
      $.each(that[resource](), function(index, item){
        if(item.excluded()) return true;
        $.put_json(resource + '/' + item.id(), item.getData()).done(function(data){
          item.setData(data);
        });
      });
    };
    
    // saves root resource
    $.put_json(root + '/' + that.id(), that.getData()).done(function(data){
      console.log(that.id(), data);
      that.setData(data);
      
      // reload subresources
      console.log('save:load');
      that.load_subresources(data);
      that.changed(false);
    });
  };
  
  this.restore = function(callback){
    $.get_json('/admin/' + root + '/' + that.id()).done(function(data){
      // restore root resource
      that.setData(data);
      // restore subresources
      
      that.load_subresources(data, callback);
      that.changed(false);
    });
  };
  
  this.load_subresources = function(data, callback){
    $.each(ctors, function(resource, ctor){
      var name = ctor.getName();
      that[resource]([]);
      that.getByIds(data[name + '_ids'], resource + '/', function(data){
        that[resource].push(new ctor(data, that));
      });
    });
  }
  
  // generates add-method for all subresources
  $.each(ctors, function(resource, ctor){
    that['add_' + ctor.getName()] = function(){
      $.post_json(resource).done(function(data){
        that[resource].unshift(new ctor(data, that));
      });
    };
  });
};

Model.prototype.setEmbedded = function(ctors)
{
  var that = this;
  if(!ctors) { ctors = {}; };
  
  $.each(ctors, function(resource, ctor){
    that['add_' + ctor.getName()] = function(){
      that[resource].unshift(new ctor({}, that));
    };
  });
};

Model.prototype.setCollections = function(ctors)
{
  var that = this;
  $.each(ctors, function(resource, ctor){
    that['add_' + ctor.getName()] = function(){
      that[resource].unshift(new ctor("", that));
    };
  });
};