/********************************************************************************************
* This function will return a callble phone link in case the user is using a mobile device. *
*********************************************************************************************/
App.callPhone = function( phone ){
	if( App.isMobile() ){
		return '<a href="tel:' + App.phone.format( phone ).replace( /\-/g, '' ) + '">' + phone + '</a>'; 
	} else {
		return phone;
	}
}


/**************************************************
* Functions to identify the user's browser/device *
**************************************************/

App.isMobile = function(){
	return $.browser.mobile;
}

App.iOS = function(){
	return /ipad|iphone|ipod/i.test( navigator.userAgent.toLowerCase() );
}

App.isAndroid = function(){
    return /android/i.test( navigator.userAgent.toLowerCase() );
}

App.isChrome = function(){
	// As the user agent can be changed, let make sure if the browser is chrome or not.
	return /chrom(e|ium)/.test( navigator.userAgent.toLowerCase() ) || /crios/.test( navigator.userAgent.toLowerCase() ) || ( typeof window.chrome === 'object' );
}

App.isChromeForIOS = function(){
	return App.isMobile() && App.iOS() && App.isChrome();
}


var sort_by;
(function() {
    // utility functions
    var default_cmp = function(a, b) {
        if (a == b) return 0;
        return a < b ? -1 : 1;
    },
        getCmpFunc = function(primer, reverse) {
            var cmp = default_cmp;
            if (primer) {
                cmp = function(a, b) {
                    return default_cmp(primer(a), primer(b));
                };
            }
            if (reverse) {
                return function(a, b) {
                    return -1 * cmp(a, b);
                };
            }
            return cmp;
        };

    // actual implementation
    sort_by = function() {
        var fields = [],
            n_fields = arguments.length,
            field, name, reverse, cmp;

        // preprocess sorting options
        for (var i = 0; i < n_fields; i++) {
            field = arguments[i];
            if (typeof field === 'string') {
                name = field;
                cmp = default_cmp;
            }
            else {
                name = field.name;
                cmp = getCmpFunc(field.primer, field.reverse);
            }
            fields.push({
                name: name,
                cmp: cmp
            });
        }

        return function(A, B) {
            var a, b, name, cmp, result;
            for (var i = 0, l = n_fields; i < l; i++) {
                result = 0;
                field = fields[i];
                name = field.name;
                cmp = field.cmp;

                result = cmp(A[name], B[name]);
                if (result !== 0) break;
            }
            return result;
        }
    }
}());