<?php

/**
 * @package     Joomla.Plugin
 * @subpackage  Extension.Finder
 *
 * @copyright   (C) 2019 Open Source Matters, Inc. <https://www.joomla.org>
 * @license     GNU General Public License version 2 or later; see LICENSE.txt

 * @phpcs:disable PSR1.Classes.ClassDeclaration.MissingNamespace
 */

use Joomla\CMS\Installer\Installer;
use Joomla\CMS\Plugin\CMSPlugin;
use Joomla\Component\Finder\Administrator\Indexer\Helper;
use Joomla\Database\DatabaseDriver;
use Joomla\Database\ParameterType;
use Joomla\String\StringHelper;

// phpcs:disable PSR1.Files.SideEffects
\defined('_JEXEC') or die;
// phpcs:enable PSR1.Files.SideEffects

/**
 * Finder extension plugin
 *
 * @since  4.0.0
 */
class PlgExtensionFinder extends CMSPlugin
{
    /**
     * Database object
     *
     * @var    DatabaseDriver
     * @since  4.0.0
     */
    protected $db;

    /**
     * Add common words to finder after language got installed
     *
     * @param   Installer   $installer  Installer object
     * @param   integer     $eid        Extension Identifier
     *
     * @return  void
     *
     * @since   4.0.0
     */
    public function onExtensionAfterInstall($installer, $eid)
    {
        if (!$eid) {
            return;
        }

        $extension = $this->getLanguage($eid);

        if ($extension) {
            $this->removeCommonWords($extension);
            $this->addCommonWords($extension);
        }
    }

    /**
     * Add common words to finder after language got updated
     *
     * @param   Installer  $installer  Installer object
     * @param   integer    $eid        Extension identifier
     *
     * @return  void
     *
     * @since   4.0.0
     */
    public function onExtensionAfterUpdate($installer, $eid)
    {
        $this->onExtensionAfterInstall($installer, $eid);
    }

    /**
     * Remove common words to finder after language got uninstalled
     *
     * @param   Installer  $installer  Installer instance
     * @param   integer    $eid        Extension id
     * @param   boolean    $removed    Installation result
     *
     * @return  void
     *
     * @since   4.0.0
     */
    public function onExtensionAfterUninstall($installer, $eid, $removed)
    {
        // Check that the language was successfully uninstalled.
        if ($eid && $removed && $installer->extension->type === 'language') {
            $this->removeCommonWords($installer->extension);
        }
    }

    /**
     * Get an object of information if the handled extension is a language
     *
     * @param   integer  $eid  Extension id
     *
     * @return  object
     *
     * @since   4.0.0
     */
    protected function getLanguage($eid)
    {
        $db  = $this->db;
        $eid = (int) $eid;

        $query = $db->getQuery(true)
            ->select($db->quoteName(['element', 'client_id']))
            ->from($db->quoteName('#__extensions'))
            ->where(
                [
                    $db->quoteName('extension_id') . ' = :eid',
                    $db->quoteName('type') . ' = ' . $db->quote('language'),
                ]
            )
            ->bind(':eid', $eid, ParameterType::INTEGER);

        $db->setQuery($query);
        $extension = $db->loadObject();

        return $extension;
    }

    /**
     * Add common words from a txt file to com_finder
     *
     * @param   object  $extension  Extension object
     *
     * @return  void
     *
     * @since   4.0.0
     */
    protected function addCommonWords($extension)
    {
        if ($extension->client_id == 0) {
            $path = JPATH_SITE . '/language/' . $extension->element . '/' . $extension->element . '.com_finder.commonwords.txt';
        } else {
            $path = JPATH_ADMINISTRATOR . '/language/' . $extension->element . '/' . $extension->element . '.com_finder.commonwords.txt';
        }

        if (!file_exists($path)) {
            return;
        }

        $file_content = file_get_contents($path);
        $words = explode("\n", $file_content);
        $words = array_map(
            function ($word) {
                // Remove comments
                if (StringHelper::strpos($word, ';') !== false) {
                    $word = StringHelper::substr($word, 0, StringHelper::strpos($word, ';'));
                }

                return $word;
            },
            $words
        );

        $words = array_filter(array_map('trim', $words));
        $db    = $this->db;
        $query = $db->getQuery(true);

        require_once JPATH_ADMINISTRATOR . '/components/com_finder/helpers/indexer/helper.php';

        $lang = Helper::getPrimaryLanguage($extension->element);

        $query->insert($db->quoteName('#__finder_terms_common'))
            ->columns($db->quoteName(['term', 'language', 'custom']));

        foreach ($words as $word) {
            $bindNames = $query->bindArray([$word, $lang], ParameterType::STRING);

            $query->values(implode(',', $bindNames) . ', 0');
        }

        try {
            $db->setQuery($query);
            $db->execute();
        } catch (Exception $ex) {
            // It would be nice if the common word is stored to the DB, but it isn't super important
        }
    }

    /**
     * Remove common words of a language from com_finder
     *
     * @param   object  $extension  Extension object
     *
     * @return  void
     *
     * @since   4.0.0
     */
    protected function removeCommonWords($extension)
    {
        $db = $this->db;

        require_once JPATH_ADMINISTRATOR . '/components/com_finder/helpers/indexer/helper.php';

        $lang = Helper::getPrimaryLanguage($extension->element);

        $query = $db->getQuery(true);
        $query->delete($db->quoteName('#__finder_terms_common'))
            ->where(
                [
                    $db->quoteName('language') . ' = :lang',
                    $db->quoteName('custom') . ' = 0',
                ]
            )
            ->bind(':lang', $lang);

        $db->setQuery($query);
        $db->execute();
    }
}