Two way binding for marionette with marionette.behavior like angularjs directives approach

## app.js
var focus = new Marionette.Application();

Marionette.Behaviors.behaviorsLookup = function() {
    return focus.behaviors;
};

focus.router = new Marionette.AppRouter();

focus.addRegions({
    mainRegion: '#mainRegion'
});

$(document).ready(function () {
    focus.start();
});

## controller.js
focus.module('test', function (test, focus, Backbone, Marionette, $, _) {
    test.controller={
      init:function(){
          $view=new focus.test.view({model:focus.test.model});
          focus.mainRegion.show($view);
      }
    };
});

## form.html
<form mrmodel="focus.test">
	<input name='name' type='text' mrfield="name" required />
	<input name='surname' type='text' mrfield="surname" />
	<input name='birthday' type='date' mrfield="birthday" />
	<input name='phone' type='text' mrfield="phone" />
	<input name='age' type='number' mrfield="age" />

	<input type="checkbox" name="testCheck1w" value="test1" mrfield="testCheck1" />
	<input type="checkbox" name="testCheck2f" value="test2" mrfield="testCheck2" />

	<input type="checkbox" name="testCheckGroup[]" value="test3" mrfield="checkGroup" />
	<input type="checkbox" name="testCheckGroup[]" value="test4" mrfield="checkGroup" />

	<label>
	<input type="radio" name="testRadiof" value="radio1" mrfield="testRadio" />
	Radio</label>
	<input type="radio" name="testRadiof" value="radio2" mrfield="testRadio" />
	<input type="radio" name="testRadiof" value="radio3" mrfield="testRadio" />

	<select multiple name="multiSelect" mrfield="testMultiSelect">
		<option value="select1">Select1</option>
		<option value="select2">Select2</option>
		<option value="select3">Select3</option>
		<option value="select4">Select4</option>
	</select>

	<select name="onlySelect" mrfield="testSelect">
		<option value="select1">Select1</option>
		<option value="select2">Select2</option>
		<option value="select3">Select3</option>
		<option value="select4">Select4</option>
	</select>

	<input type="submit" name="formSubmit" value="send" />
	<input type="reset" name="formReset" value="reset" />
</form>

## index.html
<!DOCTYPE html>
<html>
    <head>
    <title>Focus</title>
    </head>
<body id="mainRegion">
<div>Content</div>
</body>
</html>

## model.js
focus.module('test', function (test, focus, Backbone, Marionette, $, _) {
    test.modelClass = Backbone.Model.extend({
        defaults: {
            name: 'Emrah',
            surname: 'TOY',
            birthday: '2014-09-29',
            phone: '0 532 234',
            age: 32,
            checkGroup:['test3','test4'],
            testMultiSelect:['select1','select4'],
            testSelect:'select3',
            testRadio:'radio2',
            testCheck2:'test2'
        }
    });
    test.model = new test.modelClass();
});

## modelBind.js
// focus is applications name. Behaviors lookup also set to lookup at focus.behavours
focus.module('behaviors', function (behaviors, focus, Backbone, Marionette, $, _) {
    behaviors.modelBind = Marionette.Behavior.extend({
        events: {
            'change [mrfield]': 'onViewChange',
            'click input[type="reset"]': 'onReset'
        },
        modelEvents: {
            'change': 'onModelChange'
        },
        onShow: function () {
            this.updateView(this.view.model.attributes);
        },
        onReset: function (e) {
            e.preventDefault();
            this.view.model.clear();
            this.view.model.set(this.view.model.defaults);
        },
        onModelChange: function (model) {
            this.updateView(model.changed);
        },
        onViewChange: function (element) {
            var value = this.getValueByType($(element.currentTarget));
            var attributeName = element.currentTarget.attributes['mrfield'].value;
            this.updateModel(attributeName, value, {silent: true});
        },
        updateView: function (model) {
            var self = this;
            if (!_.isEmpty(model)) {
                _.forEach(model, function (value, name, object) {
                    this.updateViewByType(this.$('[mrfield=' + name + ']'), value);
                }, this);
            }
        },
        updateModel: function (name, value, options) {
            if (_.isBoolean(value) || (_.isString(value) && value.length > 0) || (_.isArray(value) && value.length > 0)) {
                if (value === parseInt(value, 10)) {
                    value = parseInt(value, 10);
                }
                this.view.model.set(name, value, options);
            } else {
                this.view.model.unset(name, options);
            }
        },
        getValueByType: function ($element) {
            var value;
            if ($element.prop('tagName') === 'INPUT' && $element.attr('type') === 'checkbox' && $element.attr('name').indexOf('[]') !== -1) {
                value = [];
                this.$("input[name='" + $element.attr('name') + "']:checked").each(
                        function () {
                            value.push($(this).val());
                        }
                );
            } else {
                value = $element.val();
            }
            return value;
        },
        updateViewByType: function ($element, value) {
            if ($element.prop('tagName') === 'INPUT' && ($element.attr('type') === 'checkbox' || $element.attr('type') === 'radio')) {
                if ($element.attr('name').indexOf('[]') !== -1) {
                    $element.prop('checked', false);
                    if(value!==undefined) $element.val(value);
                } else {
                    $element.prop('checked', false);
                    $element.filter('[value="' + value + '"]').prop('checked', true).trigger('change');
                }
            }
            else {
                $element.val(value);
            }
        }
    });
});

## router.js
focus.module('test', function (test, focus, Backbone, Marionette, $, _) {
    test.router={
        "test": "init"
    };
    focus.router.processAppRoutes(test.controller, test.router);
});

## view.js
focus.module('test', function (test, focus, Backbone, Marionette, $, _) {
    test.view = Marionette.ItemView.extend({
        behaviors:{
            modelBind:'' // model bind doesnt take any variable but we could send the model.
        },
        template: templates['items.form'] // compiled template
    });
});
	var focus = new Marionette.Application();

	Marionette.Behaviors.behaviorsLookup = function() {
	return focus.behaviors;
	};

	focus.router = new Marionette.AppRouter();

	focus.addRegions({
	mainRegion: '#mainRegion'
	});

	$(document).ready(function () {
	focus.start();
	});
	focus.module('test', function (test, focus, Backbone, Marionette, $, _) {
	test.controller={
	init:function(){
	$view=new focus.test.view({model:focus.test.model});
	focus.mainRegion.show($view);
	}
	};
	});
	<form mrmodel="focus.test">
	<input name='name' type='text' mrfield="name" required />
	<input name='surname' type='text' mrfield="surname" />
	<input name='birthday' type='date' mrfield="birthday" />
	<input name='phone' type='text' mrfield="phone" />
	<input name='age' type='number' mrfield="age" />

	<input type="checkbox" name="testCheck1w" value="test1" mrfield="testCheck1" />
	<input type="checkbox" name="testCheck2f" value="test2" mrfield="testCheck2" />

	<input type="checkbox" name="testCheckGroup[]" value="test3" mrfield="checkGroup" />
	<input type="checkbox" name="testCheckGroup[]" value="test4" mrfield="checkGroup" />

	<label>
	<input type="radio" name="testRadiof" value="radio1" mrfield="testRadio" />
	Radio</label>
	<input type="radio" name="testRadiof" value="radio2" mrfield="testRadio" />
	<input type="radio" name="testRadiof" value="radio3" mrfield="testRadio" />

	<select multiple name="multiSelect" mrfield="testMultiSelect">
	<option value="select1">Select1</option>
	<option value="select2">Select2</option>
	<option value="select3">Select3</option>
	<option value="select4">Select4</option>
	</select>

	<select name="onlySelect" mrfield="testSelect">
	<option value="select1">Select1</option>
	<option value="select2">Select2</option>
	<option value="select3">Select3</option>
	<option value="select4">Select4</option>
	</select>

	<input type="submit" name="formSubmit" value="send" />
	<input type="reset" name="formReset" value="reset" />
	</form>
	<!DOCTYPE html>
	<html>
	<head>
	<title>Focus</title>
	</head>
	<body id="mainRegion">
	<div>Content</div>
	</body>
	</html>
	focus.module('test', function (test, focus, Backbone, Marionette, $, _) {
	test.modelClass = Backbone.Model.extend({
	defaults: {
	name: 'Emrah',
	surname: 'TOY',
	birthday: '2014-09-29',
	phone: '0 532 234',
	age: 32,
	checkGroup:['test3','test4'],
	testMultiSelect:['select1','select4'],
	testSelect:'select3',
	testRadio:'radio2',
	testCheck2:'test2'
	}
	});
	test.model = new test.modelClass();
	});
	// focus is applications name. Behaviors lookup also set to lookup at focus.behavours
	focus.module('behaviors', function (behaviors, focus, Backbone, Marionette, $, _) {
	behaviors.modelBind = Marionette.Behavior.extend({
	events: {
	'change [mrfield]': 'onViewChange',
	'click input[type="reset"]': 'onReset'
	},
	modelEvents: {
	'change': 'onModelChange'
	},
	onShow: function () {
	this.updateView(this.view.model.attributes);
	},
	onReset: function (e) {
	e.preventDefault();
	this.view.model.clear();
	this.view.model.set(this.view.model.defaults);
	},
	onModelChange: function (model) {
	this.updateView(model.changed);
	},
	onViewChange: function (element) {
	var value = this.getValueByType($(element.currentTarget));
	var attributeName = element.currentTarget.attributes['mrfield'].value;
	this.updateModel(attributeName, value, {silent: true});
	},
	updateView: function (model) {
	var self = this;
	if (!_.isEmpty(model)) {
	_.forEach(model, function (value, name, object) {
	this.updateViewByType(this.$('[mrfield=' + name + ']'), value);
	}, this);
	}
	},
	updateModel: function (name, value, options) {
	if (_.isBoolean(value) \|\| (_.isString(value) && value.length > 0) \|\| (_.isArray(value) && value.length > 0)) {
	if (value === parseInt(value, 10)) {
	value = parseInt(value, 10);
	}
	this.view.model.set(name, value, options);
	} else {
	this.view.model.unset(name, options);
	}
	},
	getValueByType: function ($element) {
	var value;
	if ($element.prop('tagName') === 'INPUT' && $element.attr('type') === 'checkbox' && $element.attr('name').indexOf('[]') !== -1) {
	value = [];
	this.$("input[name='" + $element.attr('name') + "']:checked").each(
	function () {
	value.push($(this).val());
	}
	);
	} else {
	value = $element.val();
	}
	return value;
	},
	updateViewByType: function ($element, value) {
	if ($element.prop('tagName') === 'INPUT' && ($element.attr('type') === 'checkbox' \|\| $element.attr('type') === 'radio')) {
	if ($element.attr('name').indexOf('[]') !== -1) {
	$element.prop('checked', false);
	if(value!==undefined) $element.val(value);
	} else {
	$element.prop('checked', false);
	$element.filter('[value="' + value + '"]').prop('checked', true).trigger('change');
	}
	}
	else {
	$element.val(value);
	}
	}
	});
	});
	focus.module('test', function (test, focus, Backbone, Marionette, $, _) {
	test.router={
	"test": "init"
	};
	focus.router.processAppRoutes(test.controller, test.router);
	});
	focus.module('test', function (test, focus, Backbone, Marionette, $, _) {
	test.view = Marionette.ItemView.extend({
	behaviors:{
	modelBind:'' // model bind doesnt take any variable but we could send the model.
	},
	template: templates['items.form'] // compiled template
	});
	});