sessioncommunities.online/sites/+components/tbl_communities.php

<?php
	require_once "$PROJECT_ROOT/php/utils/utils.php";
	require_once "$PROJECT_ROOT/php/utils/servers-rooms.php";

	/**
	 * @var CommunityRoom[] $rooms
	 */

	// Once handlers are attached in JS, this check ceases to be useful.
	function column_sortable($id) {
		// Join URL contents are not guaranteed to have visible text.
		return $id != "qr" && $id != "preview" && $id != "join_url";
	}

	function sort_onclick($colno) {
		global $TABLE_COLUMNS;
		$column = $TABLE_COLUMNS[$colno];
		if (!column_sortable($column['id'])) return "";
		$name = $column['name'];
		return " title='Click to sort by $name'";
	}

	$TABLE_COLUMNS = [
		['id' => "identifier", 'name' => "Identifier"],
		['id' => "language", 'name' => "L"],
		['id' => "name", 'name' => "Name"],
		['id' => "description", 'name' => "Description"],
		['id' => "users", 'name' => "Users"],
		['id' => "preview", 'name' => "Preview"],
		['id' => "qr", 'name' => "QR"],
		['id' => "server_icon", 'name' => "Server"],
		['id' => "join_url", 'name' => "Join URL"],
	];
?>

<table id="tbl_communities">
	<tr>
<?php foreach ($TABLE_COLUMNS as $colno => $column): ?>
		<th<?=sort_onclick($colno)?> id="th_<?=$column['id']?>">
			<?=$column['name']?>

		</th>
<?php endforeach; ?>
	</tr>
<?php foreach ($rooms as $id => $room): ?>
	<?php
		// TODO: Do not forget to rename this escape when merging!
		$token = $room->server->get_pubkey();
		$icon_hue = hexdec($token[2] . $token[2]);
		$icon_color = "hsl($icon_hue, 80%, 50%)";

		$hostname = $room->server->get_base_url();

		// Escape external input.
		// Ternaries prevent passing null-equal strings, which produce warnings.
		$id = htmlspecialchars($room->get_room_identifier());
		$language = $room->language_flag ? htmlspecialchars($room->language_flag) : "";
		$name = htmlspecialchars($room->name);
		$desc = $room->description ? htmlspecialchars($room->description) : "";
		$users = htmlspecialchars($room->active_users);
		$preview_link = htmlspecialchars($room->get_preview_url());
		$join_link = htmlspecialchars($room->get_join_url());
		// TODO: Do not forget to rename this escape when merging!
		$token = htmlspecialchars($token);
		$hostname = htmlspecialchars($hostname);
	?>

	<tr id="<?=$id?>" itemscope itemtype="https://schema.org/EntryPoint" --data-identifier="<?=$id?>">
		<td class="td_identifier" itemprop="identifier"><?=$id?></td>
		<td class="td_language"><?=$language?></td>
		<td class="td_name" itemprop="name"><?=$name?></td>
		<td class="td_description" itemprop="description"><?=$desc?></td>
		<td class="td_users"><?=$users?></td>
		<td class="td_preview" itemprop="url">
			<a href="<?=$preview_link?>" target="_blank" rel="noopener noreferrer nofollow">
				<?php if (str_starts_with($room->get_preview_url(), 'http://')): ?>
					<span class="protocol-indicator protocol-http">HTTP</span>
				<?php endif; ?>
				<?php if (str_starts_with($room->get_preview_url(), 'https://')): ?>
					<span class="protocol-indicator protocol-https">HTTPS</span>
				<?php endif; ?>
			</a>
		</td>
		<td class="td_qr_code">
			<img
				class="qr-code-icon"
				src="qrcode-solid.svg"
				alt="Pictogram of a QR code"
			>
		</td>
		<td class="td_server_icon"
			data-token="<?=$token?>"
			title="<?=$hostname?> (<?=$token?>)"
			item="image"
		>
			<div class="td_server_icon-circle" style="background-color: <?=$icon_color?>">
				<span><?=strtoupper($token[0] . $token[1])?></span>
			</div>
		</td>
		<td class="td_join_url">
			<div class="join_url_container" data-url="<?=$join_link?>">
				<a class="join_url show-from-w5" title="<?=$join_link?>"
					><?=truncate($join_link, 32)?></a>
				<a class="noscript" href="<?=$join_link?>" rel="external nofollow"
					>Copy link</a>
			</div>
		</td>
	</tr>
<?php endforeach; ?>
</table>