<?php
/**
 * Copyright (c) 2017 Bastian Germann
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
namespace Cforms2;

class FormSettings
{
    private static $forms = array();
    private $ind;
    private $pre;

    private function __construct($index_form, $index_prefix)
    {
        $this->ind = $index_form;
        $this->pre = $index_prefix;
    }

    public function name()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'fname');
    }

    // core

    public function getDefaultEnctype()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'formaction');
    }

    public function getDontClear()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'dontclear');
    }

    public function getCustomNames()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'customnames');
    }

    public function getExtraVar()
    {
        return substr(Settings::instance()->get($this->ind, $this->pre . 'tellafriend'), 0, 1) === '3';
    }

    public function getHide()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'hide');
    }

    private function convertFormatToTime($formatted_date)
    {
        if (trim($formatted_date) === '') {
            return 0;
        }
        $time = str_replace('/', '.', $formatted_date) . sprintf(' %+d', get_option('gmt_offset'));
        $time = strtotime($time);
        if ($time === false) {
            return 0;
        }
        return $time;
    }

    public function getStartDateTime()
    {
        return $this->convertFormatToTime($this->getStartDate());
    }

    private function getStartDate()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'startdate');
    }

    public function getEndDateTime()
    {
        return $this->convertFormatToTime($this->getEndDate());
    }

    private function getEndDate()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'enddate');
    }

    public function getRedirect()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'redirect');
    }

    public function getRedirectPage()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'redirect_page');
    }

    public function getAction()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'action');
    }

    public function getActionPage()
    {
        $url = Settings::instance()->get($this->ind, $this->pre . 'action_page');
        return $url === 'http://' ? '' : $url;
    }

    // fileupload

    public function getUploadExtensions()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'upload_ext');
    }

    public function getUploadSize()
    {
        return (int) Settings::instance()->get($this->ind, $this->pre . 'upload_size');
    }

    public function getNoAttachments()
    {
        return Settings::instance()->get($this->ind, $this->pre . 'noattachments');
    }

    /**
     * Converts a natural number to the corresponding form ID.
     *
     * @param  int $no a natural number
     * @return string the cformsII form ID
     */
    private static function formId($no)
    {
        if ($no < 2) {
            return '';
        }
        return strval($no);
    }

    /**
     * Returns the settings object of the form with ID $id. If it does not exist returns null.
     *
     * @param  mixed $id a cformsII form ID
     * @return FormSettings
     */
    public static function form($id)
    {
        if (is_int($id)) {
            $id = FormSettings::formId($id);
        }
        if (isset(FormSettings::$forms[$id])) {
            return FormSettings::$forms[$id];
        } elseif (Settings::instance()->get("form{$id}")) {
            FormSettings::$forms[$id] = new FormSettings("form{$id}", "cforms{$id}_");
            return FormSettings::$forms[$id];
        }
        return null;
    }

    /**
     * @return array associative array of FormSettings instances
     */
    public static function forms()
    {
        $no = 1;
        while (FormSettings::form($no) != null) {
            $no += 1;
        }
        return FormSettings::$forms;
    }

    /**
     * Resets the static fields.
     */
    public static function reset()
    {
        FormSettings::$forms = array();
        Settings::reset();
    }
}