<?php
/*
	Question2Answer by Gideon Greenspan and contributors
	http://www.question2answer.org/

	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 2
	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.

	More about this license: http://www.question2answer.org/license.php
*/

namespace Q2A\Controllers\Admin;

use Q2A\Controllers\BaseController;
use Q2A\Database\DbConnection;
use Q2A\Middleware\Auth\MinimumUserLevel;

/**
 * Controller for admin page for editing custom user fields.
 */
class UserFields extends BaseController
{
	public function __construct(DbConnection $db)
	{
		require_once QA_INCLUDE_DIR . 'app/admin.php';
		require_once QA_INCLUDE_DIR . 'db/selects.php';

		parent::__construct($db);

		$this->addMiddleware(new MinimumUserLevel(QA_USER_LEVEL_ADMIN));
	}

	public function index()
	{
		// Get current list of user fields and determine the state of this admin page

		$fieldid = qa_post_text('edit');
		if (!isset($fieldid))
			$fieldid = qa_get('edit');

		$userfields = qa_db_select_with_pending(qa_db_userfields_selectspec());

		$editfield = null;
		foreach ($userfields as $userfield) {
			if ($userfield['fieldid'] == $fieldid)
				$editfield = $userfield;
		}


		// Check admin privileges (do late to allow one DB query)

		if (!qa_admin_check_privileges($qa_content))
			return $qa_content;


		// Process saving an old or new user field

		$securityexpired = false;

		if (qa_clicked('docancel')) {
			qa_redirect('admin/users');
		} elseif (qa_clicked('dosavefield')) {
			require_once QA_INCLUDE_DIR . 'db/admin.php';
			require_once QA_INCLUDE_DIR . 'util/string.php';

			if (!qa_check_form_security_code('admin/userfields', qa_post_text('code')))
				$securityexpired = true;
			else {
				if (qa_post_text('dodelete')) {
					qa_db_userfield_delete($editfield['fieldid']);
					qa_redirect('admin/users');
				} else {
					$inname = qa_post_text('name');
					$intype = qa_post_text('type');
					$inonregister = (int)qa_post_text('onregister');
					$inflags = $intype | ($inonregister ? QA_FIELD_FLAGS_ON_REGISTER : 0);
					$inposition = qa_post_text('position');
					$inpermit = (int)qa_post_text('permit');

					$errors = array();

					// Verify the name is legitimate

					if (qa_strlen($inname) > QA_DB_MAX_PROFILE_TITLE_LENGTH)
						$errors['name'] = qa_lang_sub('main/max_length_x', QA_DB_MAX_PROFILE_TITLE_LENGTH);

					// Perform appropriate database action

					if (isset($editfield['fieldid'])) { // changing existing user field
						qa_db_userfield_set_fields($editfield['fieldid'], isset($errors['name']) ? $editfield['content'] : $inname, $inflags, $inpermit);
						qa_db_userfield_move($editfield['fieldid'], $inposition);

						if (empty($errors)) {
							qa_redirect('admin/users');
						} else {
							$userfields = qa_db_select_with_pending(qa_db_userfields_selectspec()); // reload after changes
							foreach ($userfields as $userfield) {
								if ($userfield['fieldid'] == $editfield['fieldid'])
									$editfield = $userfield;
							}
						}
					} elseif (empty($errors)) { // creating a new user field
						for ($attempt = 0; $attempt < 1000; $attempt++) {
							$suffix = $attempt ? ('-' . (1 + $attempt)) : '';
							$newtag = qa_substr(implode('-', qa_string_to_words($inname)), 0, QA_DB_MAX_PROFILE_TITLE_LENGTH - strlen($suffix)) . $suffix;
							$uniquetag = true;

							foreach ($userfields as $userfield) {
								if (qa_strtolower(trim($newtag)) == qa_strtolower(trim($userfield['title'])))
									$uniquetag = false;
							}

							if ($uniquetag) {
								$fieldid = qa_db_userfield_create($newtag, $inname, $inflags, $inpermit);
								qa_db_userfield_move($fieldid, $inposition);
								qa_redirect('admin/users');
							}
						}

						qa_fatal_error('Could not create a unique database tag');
					}
				}
			}
		}


		// Prepare content for theme

		$qa_content = qa_content_prepare();

		$qa_content['title'] = qa_lang_html('admin/admin_title') . ' - ' . qa_lang_html('admin/users_title');
		$qa_content['error'] = $securityexpired ? qa_lang_html('admin/form_security_expired') : qa_admin_page_error();

		$positionoptions = array();
		$previous = null;
		$passedself = false;

		foreach ($userfields as $userfield) {
			if (isset($previous))
				$positionhtml = qa_lang_html_sub('admin/after_x', qa_html(qa_user_userfield_label($passedself ? $userfield : $previous)));
			else
				$positionhtml = qa_lang_html('admin/first');

			$positionoptions[$userfield['position']] = $positionhtml;

			if ($userfield['fieldid'] == @$editfield['fieldid'])
				$passedself = true;

			$previous = $userfield;
		}

		if (isset($editfield['position'])) {
			$positionvalue = $positionoptions[$editfield['position']];
		} else {
			$positionvalue = isset($previous) ? qa_lang_html_sub('admin/after_x', qa_html(qa_user_userfield_label($previous))) : qa_lang_html('admin/first');
			$positionoptions[1 + @max(array_keys($positionoptions))] = $positionvalue;
		}

		$typeoptions = array(
			0 => qa_lang_html('admin/field_single_line'),
			QA_FIELD_FLAGS_MULTI_LINE => qa_lang_html('admin/field_multi_line'),
			QA_FIELD_FLAGS_LINK_URL => qa_lang_html('admin/field_link_url'),
		);

		$permitoptions = qa_admin_permit_options(QA_PERMIT_ALL, QA_PERMIT_ADMINS, false, false);
		$permitvalue = @$permitoptions[isset($inpermit) ? $inpermit : $editfield['permit']];

		$qa_content['form'] = array(
			'tags' => 'method="post" action="' . qa_path_html(qa_request()) . '"',

			'style' => 'tall',

			'fields' => array(
				'name' => array(
					'tags' => 'name="name" id="name"',
					'label' => qa_lang_html('admin/field_name'),
					'value' => qa_html(isset($inname) ? $inname : qa_user_userfield_label($editfield)),
					'error' => qa_html(@$errors['name']),
				),

				'delete' => array(
					'tags' => 'name="dodelete" id="dodelete"',
					'label' => qa_lang_html('admin/delete_field'),
					'value' => 0,
					'type' => 'checkbox',
				),

				'type' => array(
					'id' => 'type_display',
					'tags' => 'name="type"',
					'label' => qa_lang_html('admin/field_type'),
					'type' => 'select',
					'options' => $typeoptions,
					'value' => @$typeoptions[isset($intype) ? $intype : (@$editfield['flags'] & (QA_FIELD_FLAGS_MULTI_LINE | QA_FIELD_FLAGS_LINK_URL))],
				),

				'permit' => array(
					'id' => 'permit_display',
					'tags' => 'name="permit"',
					'label' => qa_lang_html('admin/permit_to_view'),
					'type' => 'select',
					'options' => $permitoptions,
					'value' => $permitvalue,
				),

				'position' => array(
					'id' => 'position_display',
					'tags' => 'name="position"',
					'label' => qa_lang_html('admin/position'),
					'type' => 'select',
					'options' => $positionoptions,
					'value' => $positionvalue,
				),

				'onregister' => array(
					'id' => 'register_display',
					'tags' => 'name="onregister"',
					'label' => qa_lang_html('admin/show_on_register_form'),
					'type' => 'checkbox',
					'value' => isset($inonregister) ? $inonregister : (@$editfield['flags'] & QA_FIELD_FLAGS_ON_REGISTER),
				),
			),

			'buttons' => array(
				'save' => array(
					'label' => qa_lang_html(isset($editfield['fieldid']) ? 'main/save_button' : ('admin/add_field_button')),
				),

				'cancel' => array(
					'tags' => 'name="docancel"',
					'label' => qa_lang_html('main/cancel_button'),
				),
			),

			'hidden' => array(
				'dosavefield' => '1', // for IE
				'edit' => @$editfield['fieldid'],
				'code' => qa_get_form_security_code('admin/userfields'),
			),
		);

		if (isset($editfield['fieldid'])) {
			qa_set_display_rules($qa_content, array(
				'type_display' => '!dodelete',
				'position_display' => '!dodelete',
				'register_display' => '!dodelete',
				'permit_display' => '!dodelete',
			));
		} else {
			unset($qa_content['form']['fields']['delete']);
		}

		$qa_content['focusid'] = 'name';

		$qa_content['navigation']['sub'] = qa_admin_sub_navigation();


		return $qa_content;
	}
}
