<?php
/**
 * @brief periodical, a plugin for Dotclear 2
 * 
 * @package Dotclear
 * @subpackage Plugin
 * 
 * @author Jean-Christian Denis and contributors
 * 
 * @copyright Jean-Christian Denis
 * @copyright GPL-2.0 https://www.gnu.org/licenses/gpl-2.0.html
 */

if (!defined('DC_CONTEXT_ADMIN')) {
    return null;
}

$core->blog->settings->addNamespace('periodical');

$core->addBehavior(
    'adminBlogPreferencesForm',
    ['adminPeriodical', 'adminBlogPreferencesForm']
);
$core->addBehavior(
    'adminBeforeBlogSettingsUpdate',
    ['adminPeriodical', 'adminBeforeBlogSettingsUpdate']
);
$core->addBehavior(
    'adminFiltersLists',
    ['adminPeriodical', 'adminFiltersLists']
);

if ($core->blog->settings->periodical->periodical_active) {

    $_menu['Plugins']->addItem(
        __('Periodical'),
        'plugin.php?p=periodical',
        'index.php?pf=periodical/icon.png',
        preg_match(
            '/plugin.php\?p=periodical(&.*)?$/',
            $_SERVER['REQUEST_URI']
        ),
        $core->auth->check('usage,contentadmin', $core->blog->id)
    );

    $core->addBehavior(
        'adminDashboardFavorites',
        ['adminPeriodical', 'adminDashboardFavorites']
    );
    $core->addBehavior(
        'adminPostHeaders',
        ['adminPeriodical', 'adminPostHeaders']
    );
    $core->addBehavior(
        'adminPostsActionsPage',
        ['adminPeriodical', 'adminPostsActionsPage']
    );
    $core->addBehavior(
        'adminPostFormItems',
        ['adminPeriodical', 'adminPostFormItems']
    );
    $core->addBehavior(
        'adminAfterPostUpdate',
        ['adminPeriodical', 'adminAfterPostSave']
    );
    $core->addBehavior(
        'adminAfterPostCreate',
        ['adminPeriodical', 'adminAfterPostSave']
    );
}

$core->addBehavior(
    'adminBeforePostDelete',
    ['adminPeriodical', 'adminBeforePostDelete']
);

/**
 * @ingroup DC_PLUGIN_PERIODICAL
 * @brief Periodical - admin methods.
 * @since 2.6
 */
class adminPeriodical
{
    public static $combo_period = null;

    public static function sortbyCombo()
    {
        return [
            __('Next update') => 'periodical_curdt',
            __('End date')    => 'periodical_enddt',
            __('Frequence')   => 'periodical_pub_int'
        ];
    }

    /**
     * Add settings to blog preference
     * 
     * @param  dcCore       $core           dcCore instance
     * @param  dcSettings   $blog_settings  dcSettings instance
     */
    public static function adminBlogPreferencesForm(dcCore $core, dcSettings $blog_settings)
    {
        $s_active = (boolean) $blog_settings->periodical->periodical_active;
        $s_upddate = (boolean) $blog_settings->periodical->periodical_upddate;
        $s_updurl = (boolean) $blog_settings->periodical->periodical_updurl;

        echo
        '<div class="fieldset"><h4 id="periodical_params">' . __('Periodical') . '</h4>' .
        '<div class="two-cols">' .
        '<div class="col">' .
        '<h5>' . __('Activation') . '</h5>' .
        '<p><label class="classic" for="periodical_active">' .
        form::checkbox('periodical_active', 1, $s_active) .
        __('Enable plugin') . '</label></p>' .
        '</div>' .
        '<div class="col">' .
        '<h5>' . __('Dates of published entries') . '</h5>' .
        '<p><label for="periodical_upddate">' .
        form::checkbox('periodical_upddate', 1, $s_upddate) .
        __('Update post date') . '</label></p>' .
        '<p><label for="periodical_updurl">' .
        form::checkbox('periodical_updurl', 1, $s_updurl) .
        __('Update post url') . '</label></p>' .
        '</div>' .
        '</div>' .
        '<br class="clear" />' .
        '</div>';
    }

    /**
     * Save blog settings
     * 
     * @param  dcSettings   $blog_settings  dcSettings instance
     */
    public static function adminBeforeBlogSettingsUpdate(dcSettings $blog_settings)
    {
        $blog_settings->periodical->put('periodical_active', !empty($_POST['periodical_active']));
        $blog_settings->periodical->put('periodical_upddate', !empty($_POST['periodical_upddate']));
        $blog_settings->periodical->put('periodical_updurl', !empty($_POST['periodical_updurl']));
    }

    public static function adminFiltersLists(dcCore $core, $sorts)
    {
        $sorts['periodical'] = [
            __('Periodical'),
            self::sortbyCombo(),
            'periodical_curdt',
            'desc',
            [__('periods per page'), 10]
        ];
    }

    /**
     * Favorites.
     *
     * @param   dcCore      $core dcCore instance
     * @param   arrayObject $favs Array of favorites
     */
    public static function adminDashboardFavorites(dcCore $core, $favs)
    {
        $favs->register('periodical', [
            'title' => __('Periodical'),
            'url' => 'plugin.php?p=periodical',
            'small-icon' => 'index.php?pf=periodical/icon.png',
            'large-icon' => 'index.php?pf=periodical/icon-big.png',
            'permissions' => $core->auth->check(
                'usage,contentadmin',
                $core->blog->id
            ),
            'active_cb' => [
                'adminPeriodical', 
                'adminDashboardFavoritesActive'
            ]
        ]);
    }

    /**
     * Favorites selection.
     *
     * @param   string $request Requested page
     * @param   array  $params  Requested parameters
     */
    public static function adminDashboardFavoritesActive($request, $params)
    {
        return $request == 'plugin.php' 
            && isset($params['p']) 
            && $params['p'] == 'periodical';
    }

    /**
     * Add javascript for toggle
     * 
     * @return string HTML head
     */
    public static function adminPostHeaders()
    {
        return dcPage::jsLoad('index.php?pf=periodical/js/toggle.js');
    }

    /**
     * Delete relation between post and period
     * 
     * @param  integer $post_id Post id
     */
    public static function adminBeforePostDelete($post_id)
    {
        self::delPeriod($GLOBALS['core'], $post_id);
    }

    /**
     * Add actions to posts page combo
     * 
     * @param  dcCore             $core dcCore instance
     * @param  dcPostsActionsPage $ap   dcPostsActionsPage instance
     */
    public static function adminPostsActionsPage(dcCore $core, dcPostsActionsPage $pa)
    {
        $pa->addAction(
            [__('Periodical') => [__('Add to periodical') => 'periodical_add']],
            ['adminPeriodical', 'callbackAdd']
        );

        if (!$core->auth->check('delete,contentadmin', $core->blog->id)) {
            return null;
        }
        $pa->addAction(
            [__('Periodical') => [__('Remove from periodical') => 'periodical_remove']],
            ['adminPeriodical', 'callbackRemove']
        );
    }

    /**
     * Posts actions callback to remove period
     * 
     * @param  dcCore             $core dcCore instance
     * @param  dcPostsActionsPage $pa   dcPostsActionsPage instance
     * @param  ArrayObject        $post _POST actions
     */
    public static function callbackRemove(dcCore $core, dcPostsActionsPage $pa, ArrayObject $post)
    {
        # No entry
        $posts_ids = $pa->getIDs();
        if (empty($posts_ids)) {
            throw new Exception(__('No entry selected'));
        }

        # No right
        if (!$core->auth->check('delete,contentadmin', $core->blog->id)) {
            throw new Exception(__('No enough right'));
        }

        # Remove linked period
        foreach($posts_ids as $post_id) {
            self::delPeriod($core, $post_id);
        }

        dcPage::addSuccessNotice(__('Posts have been removed from periodical.'));
        $pa->redirect(true);
    }

    /**
     * Posts actions callback to add period
     * 
     * @param  dcCore             $core dcCore instance
     * @param  dcPostsActionsPage $pa   dcPostsActionsPage instance
     * @param  ArrayObject        $post _POST actions
     */
    public static function callbackAdd(dcCore $core, dcPostsActionsPage $pa, ArrayObject $post)
    {
        # No entry
        $posts_ids = $pa->getIDs();
        if (empty($posts_ids)) {
            throw new Exception(__('No entry selected'));
        }

        //todo: check if selected posts is unpublished

        # Save action
        if (!empty($post['periodical'])) {
            foreach($posts_ids as $post_id) {
                self::delPeriod($core, $post_id);
                self::addPeriod($core, $post_id, $post['periodical']);
            }

            dcPage::addSuccessNotice(__('Posts have been added to periodical.'));
            $pa->redirect(true);
        }

        # Display form
        else {
            $pa->beginPage(
                dcPage::breadcrumb(array(
                    html::escapeHTML($core->blog->name) => '',
                    $pa->getCallerTitle() => $pa->getRedirection(true),
                    __('Add a period to this selection') => '' 
                ))
            );

            echo
            '<form action="' . $pa->getURI() . '" method="post">' .
            $pa->getCheckboxes() .

            self::formPeriod($core) .

            '<p>'.
            $core->formNonce() .
            $pa->getHiddenFields() .
            form::hidden(['action'], 'periodical_add') .
            '<input type="submit" value="' . __('Save') . '" /></p>' .
            '</form>';

            $pa->endPage();
        }
    }

    /**
     * Add form to post sidebar
     * 
     * @param  ArrayObject $main_items    Main items
     * @param  ArrayObject $sidebar_items Sidebar items
     * @param  record      $post          Post record or null
     */
    public static function adminPostFormItems(ArrayObject $main_items, ArrayObject $sidebar_items, $post)
    {
        global $core;

        # Get existing linked period
        $period = '';
        if ($post) {
            $per = new periodical($core);
            $rs = $per->getPosts(['post_id' => $post->post_id]);
            $period = $rs->isEmpty() ? '' : $rs->periodical_id;
        }

        # Set linked period form items
        $sidebar_items['options-box']['items']['period'] =
            self::formPeriod($core, $period);
    }

    /**
     * Save linked period
     * 
     * @param  cursor  $cur     Current post cursor
     * @param  integer $post_id Post id
     */
    public static function adminAfterPostSave(cursor $cur, $post_id)
    {
        global $core;

        if (!isset($_POST['periodical'])) {
            return null;
        }

        # Delete old linked period
        self::delPeriod($core, $post_id);

        # Add new linked period
        self::addPeriod($core, $post_id, $_POST['periodical']);
    }

    /**
     * Posts period form field
     * 
     * @param  dcCore $core   dcCore instance
     * @param  string $period Period
     * @return string         Period form content
     */
    protected static function formPeriod(dcCore $core, $period='')
    {
        $combo = self::comboPeriod($core);

        if (empty($combo)) {
            return null;
        }

        return 
        '<p><label for="periodical">' .
        __('Periodical') . '</label>' .
        form::combo('periodical', $combo, $period) .
        '</p>';
    }

    /**
     * Combo of available periods
     * 
     * @param  dcCore $core dcCore instance
     * @return array       List of period
     */
    protected static function comboPeriod(dcCore $core)
    {
        if (adminPeriodical::$combo_period === null) {

            $per = new periodical($core);
            $periods = $per->getPeriods();

            if ($periods->isEmpty()) {
                adminPeriodical::$combo_period = [];
            } else {
                $combo = ['-' => ''];
                while ($periods->fetch()) {
                    $combo[html::escapeHTML($periods->periodical_title)] = $periods->periodical_id;
                }
            }
            adminPeriodical::$combo_period = $combo;
        }

        return adminPeriodical::$combo_period;
    }

    /**
     * Remove period from posts.
     * 
     * @param  dcCore  $core    dcCore instance
     * @param  integer $post_id Post id
     */
    protected static function delPeriod(dcCore $core, $post_id)
    {
        if ($post_id === null) {
            return null;
        }

        $post_id = (integer) $post_id;
        $per = new periodical($core);
        $per->delPost($post_id);
    }

    /**
     * Add period to posts
     * 
     * @param  dcCore  $core    dcCore instance
     * @param  integer $post_id Post id
     * @param  array   $period  Period
     */
    protected static function addPeriod($core, $post_id, $period)
    {
        # Not saved
        if ($post_id === null || empty($period)) {
            return null;
        }

        # Period object
        $per = new periodical($core);

        # Get periods
        $period = $per->getPeriods(['periodical_id' => $period]);

        # No period
        if ($period->isEmpty()) {
            return null;
        }

        $post_id = (integer) $post_id;

        # Add relation
        $per->addPost($period->periodical_id, $post_id);
    }
}