GroupMe chat archiver

groupme_backup.php

<?php

/**
 * Chat archiver for GroupMe.
 *
 * Depends on <https://github.com/jspaetzel/GroupMePHP>.
 *
 * Copyright (c) 2022 Jon Palmisciano
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * 3. Neither the name of the copyright holder nor the names of its contributors
 *    may be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

require './vendor/autoload.php';

$client = new \GroupMePHP\Client('API_KEY');
$msg_svc = new \GroupMePHP\Services\MessagesService($client);

$group_id = 1000000;

$all_msgs = [];
$before_id = 0;

while (true) {
	$args = [];
	if ($before_id != 0) {
		$args = ["before_id" => $before_id];
	}

	// Make the next request, abort on error.
	$res_json = $msg_svc->index($group_id, $args);
	$res = json_decode($res_json, false);
	if (is_null($res)) {
		break;
	}

	// Abort on non-success status code.
	$ok = $res->meta->code == 200;
	if ($ok == false) {
		break;
	}

	// Get all messages and the last message.
	$msgs = $res->response->messages;
	$last = end($msgs);
	reset($msgs);

	// Update the "before_id" parameter.
	$before_id = $last->id;

	// Add all the messages to the combined message list.
	$tmp = array_merge($all_msgs, $msgs);
	$all_msgs = $tmp;
}

// Put the messages in the correct order, then print them all.
$history = array_reverse($all_msgs);
for ($i = 0; $i < count($history); $i++) {
	print(date('c', $history[$i]->created_at) . " <" . $history[$i]->name . "> " . $history[$i]->text . "\n");
}

?>