dlueth/qoopido.nucleus

/**
 * @use /demand/validator/isObject
 * @use /demand/function/iterate
 */

(function() {
    'use strict';

    function definition(isObject, iterate) {
        return function functionMerge() {
            var target = arguments[0],
                i = 1, properties, targetProperty, targetPropertyIsObject;

            for(; (properties = arguments[i]) !== undefined; i++) {
                iterate(properties, function(property, sourceProperty) {
                    targetProperty = target[property];

                    if(sourceProperty !== undefined) {
                        if(isObject(sourceProperty)) {
                            targetPropertyIsObject = isObject(targetProperty);

                            if(sourceProperty.length !== undefined) {
                                targetProperty = (targetPropertyIsObject && targetProperty.length !== undefined) ? targetProperty : [];
                            } else {
                                targetProperty = (targetPropertyIsObject && targetProperty.length === undefined) ? targetProperty : {};
                            }

                            target[property] = functionMerge(targetProperty, sourceProperty);
                        } else {
                            target[property] = sourceProperty;
                        }
                    }
                });
            }

            return target;
        };
    }

    provide([ '/demand/validator/isObject', '/demand/function/iterate' ], definition);
}());