Javascript.php

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<?php
namespace Ajax\service;

class Javascript {

    public static $preventDefault = "\nif(event && event.preventDefault) event.preventDefault();\n";

    public static $stopPropagation = "\nif(event && event.stopPropagation) event.stopPropagation();\n";

    public static function draggable($attr = "id") {
        return 'var dt=event.dataTransfer || event.originalEvent.dataTransfer;dt.setData("text/plain",JSON.stringify({id:$(event.target).attr("id"),data:$(event.target).attr("' . $attr . '")}));';
    }

    public static function dropZone($jqueryDone, $jsCallback = "") {
        $done = ($jqueryDone != null) ? '$(event.target).' . $jqueryDone . '($("#"+_data.id));' : '';
        return 'var dt=event.dataTransfer || event.originalEvent.dataTransfer;var _data=JSON.parse(dt.getData("text/plain"));' . $done . 'var data=_data.data;' . $jsCallback;
    }

    public static function fileDropZone($jsCallback = "") {
        $done = 'event.target.upload=formData;$(event.target).trigger("upload");';
        return 'var dt=event.dataTransfer || event.originalEvent.dataTransfer;var files=dt.files;var formData = new FormData();for (var i = 0; i < files.length; i++) {formData.append("file-"+i,files[i]);}' . $done . $jsCallback;
    }

    public static function containsCode($expression) {
        if ($expression == null) {
            return false;
        }
        return \strrpos($expression, 'this') !== false || \strrpos($expression, 'event') !== false || \strrpos($expression, 'self') !== false;
    }

    public static function isFunction($jsCode) {
        return JString::startswith($jsCode, "function");
    }

    public static function fileUploadBehavior($id = '') {
        return "$('input:text, .ui.button', '#{$id}').on('click', function (e) {e.preventDefault();\$('input:file', '#{$id}').click();});
                $('input:file', '#{$id}').on('change', function (e) {if(e.target.files.length){var name = e.target.files[0].name;$('input:text', $(e.target).parent()).val(name);}});";
    }

    public static function prep_element($element) {
        if (self::containsCode($element) === false) {
            $element = '"' . addslashes($element ?? '') . '"';
        }
        return $element;
    }

    public static function prep_value($value) {
        if (\is_array($value)) {
            $value = implode(",", $value);
        }
        if (self::containsCode($value) === false) {
            $value = \str_replace([
                "\\",
                "\""
            ], [
                "\\\\",
                "\\\""
            ], $value);
            $value = '"' . $value . '"';
        }
        return trim($value, "%");
    }

    public static function prep_jquery_selector($value) {
        if (JString::startswith($value, '$(') === false) {
            return '$(' . self::prep_value($value) . ')';
        }
        return $value;
    }
}