<?php
/**
 * Class helper_plugin_dataau_aliastextbox
 *
 * Create a field with properties defined by given type alias
 * Mostly this is a single line input field, but for enum type a select field.
 */
class helper_plugin_dataau_aliastextbox extends helper_plugin_bureaucracyau _field {

    private $args;
    private $additional;

    /**
     * Arguments:
     *  - cmd
     *  - label
     *  - _typealias (optional)
     *  - ^ (optional)
     *
     * @param array $args The tokenized definition, only split at spaces
     */
    public function initialize($args) {
        $this->init($args);
        $n_args = array();
        $this->args = array();
        foreach($args as $arg) {
            if($arg[0] !== '_') {
                $n_args[] = $arg;
                continue;
            }
            $this->args[] = $arg;
        }
        $this->standardArgs($n_args);

    }

    /**
     * Prepare
     *
     * @param array $args dataau plugin related field arguments
     */
    private function prepareColumns($args) {
        /** @var helper_plugin_dataau $dthlp */
        $dthlp = plugin_load('helper', 'dataau');
        if(!$dthlp) msg('Loading the dataau helper failed. Make sure the dataau plugin is installed.', -1);

        foreach($args as $arg) {
            $arg = $this->replaceTranslation($arg);
            $datatype = $dthlp->_column($arg);
            if(is_array($datatype['type'])) {
                $datatype['basetype'] = $datatype['type']['type'];
                $datatype['enum'] = $datatype['type']['enum'];
                $datatype['type'] = $datatype['origtype'];
            } else {
                $datatype['basetype'] = $datatype['type'];
            }
        }
        $datatype['title'] = '@@DISPLAY@@';
        if(isset($datatype['enum'])) {
            $values = preg_split('/\s*,\s*/', $datatype['enum']);
            if(!$datatype['multi'] && $this->opt['optional']) array_unshift($values, '');
            $this->opt['args'] = $values;
            $this->additional = ($datatype['multi'] ? array('multiple' => 'multiple') : array());
        } else {
            $classes = 'dataau_type_' . $datatype['type'] .     ($datatype['multi'] ? 's' : '') . ' ' .
                       'dataau_type_' . $datatype['basetype'] . ($datatype['multi'] ? 's' : '');
            $content = form_makeTextField('@@NAME@@', '@@VALUE@@', '@@DISPLAY@@', '@@ID@@', '@@CLASS@@ ' . $classes);

            $this->tpl = $content;
        }
        if(!isset($this->opt['display'])) {
            $this->opt['display'] = $this->opt['label'];
        }

    }

    /**
     * Render the field as XHTML
     *
     * Creates a single line input field or select field
     *
     * @params array     $params Additional HTML specific parameters
     * @params Doku_Form $form   The target Doku_Form object
     * @params int       $formid unique identifier of the form which contains this field
     */
    public function renderfield($params, Doku_Form $form, $formid) {
        $this->prepareColumns($this->args);

        if(isset($this->tpl)) {
            parent::renderfield($params, $form, $formid);
        } else {
            // Is an enum type, otherwise $this->tpl would be set in __construct
            $this->_handlePreload();
            if(!$form->_infieldset) {
                $form->startFieldset('');
            }
            if($this->error) {
                $params['class'] = 'bureaucracyau _error';
            }
            $params = array_merge($this->opt, $params);
            $params['value'] = preg_split('/\s*,\s*/', $params['value'], -1, PREG_SPLIT_NO_EMPTY);
            if(count($params['value']) === 0) {
                $params['value'] = $params['args'][0];
            }
            if(!isset($this->opt['optional'])) {
                $this->additional['required'] = 'required';
            }

            $form->addElement(call_user_func_array('form_makeListboxField',
                                                   $this->_parse_tpl(
                                                        array(
                                                            '@@NAME@@[]',
                                                            $params['args'],
                                                            $params['value'],
                                                            '@@DISPLAY@@',
                                                            '',
                                                            '@@CLASS@@',
                                                            $this->additional
                                                        ),
                                                        $params
                                                    )));
        }
    }

    /**
     * Handle a post to the field
     *
     * Accepts and validates a posted value.
     *
     * @param string                            $value  The passed value or array or null if none given
     * @param helper_plugin_bureaucracyau _field[] $fields (reference) form fields (POST handled upto $this field)
     * @param int                               $index  index number of field in form
     * @param int                               $formid unique identifier of the form which contains this field
     * @return bool Whether the passed value is valid
     */
    public function handle_post($value, &$fields, $index, $formid) {
        if(is_array($value)) {
            $value = join(', ', $value);
        }

        return parent::handle_post($value, $fields, $index, $formid);
    }

    /**
     * Replace the translation placeholders
     *
     * @param string $string
     * @return string parsed string
     */
    private function replaceTranslation($string) {
        global $ID;
        global $conf;

        $lang = $conf['lang'];
        $trans = '';

        /** @var helper_plugin_translation $translationPlugin */
        $translationPlugin = plugin_load('helper', 'translation');
        if($translationPlugin) {
            $trans = $translationPlugin->getLangPart($ID);
            $lang = $translationPlugin->realLC('');
        }

        $string = str_replace('@LANG@', $lang, $string);
        return str_replace('@TRANS@', $trans, $string);
    }
}