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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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/**
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 * CLI search indexer
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 *
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 * @package    search
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 * @copyright  2016 Dan Poltawski <dan@moodle.com>
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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define('CLI_SCRIPT', true);
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require(__DIR__.'/../../config.php');
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require_once($CFG->libdir.'/clilib.php');      // cli only functions
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list($options, $unrecognized) = cli_get_params(array('help' => false, 'force' => false,
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        'reindex' => false, 'timelimit' => 0),
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        array('h' => 'help', 'f' => 'force', 'r' => 'reindex', 't' => 'timelimit'));
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if ($unrecognized) {
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    $unrecognized = implode("\n  ", $unrecognized);
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    cli_error(get_string('cliunknowoption', 'admin', $unrecognized));
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}
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if ($options['help']) {
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    $help =
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"Index search data
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Options:
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-h, --help              Print out this help
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-r, --reindex           Reindex data
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-f, --force             Allow indexer to run, even if global search is disabled.
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-t=<n>, --timelimit=<n> Stop after indexing for specified time (in seconds)
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Examples:
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\$ sudo -u www-data /usr/bin/php search/cli/indexer.php --reindex
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\$ sudo -u www-data /usr/bin/php search/cli/indexer.php --timelimit=300
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";
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    echo $help;
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    die;
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}
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if ($options['timelimit'] && $options['reindex']) {
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    cli_error('Cannot apply time limit when reindexing');
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}
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if (!\core_search\manager::is_global_search_enabled() && empty($options['force'])) {
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    cli_error('Global search is disabled. Use --force if you want to force an index while disabled');
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}
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if (!$searchengine = \core_search\manager::search_engine_instance()) {
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    cli_error(get_string('engineserverstatus', 'search'));
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}
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if (!$searchengine->is_installed()) {
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    cli_error('enginenotinstalled', 'search', $CFG->searchengine);
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}
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$serverstatus = $searchengine->is_server_ready();
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if ($serverstatus !== true) {
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    cli_error($serverstatus);
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}
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$globalsearch = \core_search\manager::instance();
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if (empty($options['reindex'])) {
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    if ($options['timelimit']) {
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        $limitinfo = ' (max ' . $options['timelimit'] . ' seconds)';
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        $limitunderline = preg_replace('~.~', '=', $limitinfo);
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        echo "Running index of site$limitinfo\n";
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        echo "=====================$limitunderline\n";
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        $timelimit = (int)$options['timelimit'];
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    } else {
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        echo "Running full index of site\n";
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        echo "==========================\n";
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        $timelimit = 0;
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    }
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    $before = time();
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    $globalsearch->index(false, $timelimit, new text_progress_trace());
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    // Do specific index requests with the remaining time.
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    if ($timelimit) {
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        $timelimit -= (time() - $before);
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        // Only do index requests if there is a reasonable amount of time left.
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        if ($timelimit > 1) {
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            $globalsearch->process_index_requests($timelimit, new text_progress_trace());
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        }
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    } else {
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        $globalsearch->process_index_requests(0, new text_progress_trace());
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    }
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} else {
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    echo "Running full reindex of site\n";
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    echo "============================\n";
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    $globalsearch->index(true, 0, new text_progress_trace());
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}
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// Optimize index at last.
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$globalsearch->optimize_index();