feat: add regional and tech listings

sites/+components/footer.php

@@ -8,13 +8,26 @@
 	</p>
 </aside>
 <footer id="footer">
-	<nav id="about-us">
+	<nav id="nav-communities">
 		<a
 			href="/"
 			class="footer__nav-target"
 			title="Go back to the main page of sessioncommunities.online"
-		>Home</a
+		>Main page</a
+		><a
+			href="/groups/regional"
+			class="footer__nav-target"
+			title="See our list of world-wide Session Communities"
+		>Regional Communities</a
 		><a
+			href="/groups/tech"
+			class="footer__nav-target"
+			title="See our list of technology-focused Session Communities"
+		>Tech Communities</a
+		>
+	</nav>
+	<nav id="about-us">
+		<a
 			href="/about/"
 			class="footer__nav-target"
 			target="_blank"

sites/_fragment/+room-sieve.php

@@ -1,6 +1,7 @@
 <?php
 	require_once 'php/servers/servers-rooms.php';
 	require_once 'php/utils/utils.php';
+	require_once 'php/servers/room-listings-api.php';
 
 	class RoomSieve {
 		/**
@@ -34,18 +35,18 @@
 		public function saveStickies() {
 			$stickied = CommunityRoom::get_stickied_rooms($this->rooms, $rest);
 			$rooms = $rest;
-			return new RoomSieve($rooms, $stickied);
+			return $this->cloneWith($rooms, $stickied);
 		}
 
 		/**
 		 * @param CommunityRoom[] $rooms
 		 */
 		public function addRooms(array $rooms) {
-			return new RoomSieve(array_merge($this->rooms, $rooms), $this->stickies);
+			return $this->cloneWith(array_merge($this->rooms, $rooms));
 		}
 
 		public function apply(Closure $filter) {
-			return new RoomSieve($filter($this->rooms), $this->stickies);
+			return $this->cloneWith($filter($this->rooms));
 		}
 
 		public function getWithStickies() {
@@ -62,13 +63,13 @@
 
 		public function onlyTop(int $count = RoomSieve::TOP_DEFAULT) {
 			$rooms = $this->rooms;
-			return new RoomSieve(array_slice(array_reverse($rooms), 0, $count), $this->stickies);
+			return $this->cloneWith(array_slice(array_reverse($rooms), 0, $count));
 		}
 
 		public function exceptTop(int $count = RoomSieve::TOP_DEFAULT) {
 			$rooms = $this->rooms;
 			CommunityRoom::sort_rooms_num($rooms, 'active_users');
-			return new RoomSieve(array_slice(array_reverse($rooms), $count), $this->stickies);
+			return $this->cloneWith(array_slice(array_reverse($rooms), $count));
 		}
 
 		private static function isIndexApproved(CommunityRoom $room): bool {
@@ -112,5 +113,14 @@
 			}));
 			return new RoomSieve($rooms, $this->stickies);
 		}
+
+		private function clone(): self {
+			return $this->cloneWith();
+		}
+
+		private function cloneWith($rooms = null, $stickies = null): self {
+			$clone = new RoomSieve($rooms ?? $this->rooms, $stickies ?? $this->stickies);
+			return $clone;
+		}
 	}
 ?>

sites/groups/regional/+index.h1.php

@@ -0,0 +1 @@
+<h1 id="headline">Regional Session Communities</h1>

sites/groups/regional/+index.head.php

@@ -0,0 +1,15 @@
+<title>Regional Communities — sessioncommunities.online</title>
+<meta name="description" content="Chat in Session Communities! <?php
+	?>Use our list to join your favorite Community in Session Messenger. <?php
+	?>Copy public Session group links into the Session app!<?php
+?>">
+<?php
+?>
+<meta name="keywords" content="session communities,session groups,session group list,session chat">
+<meta property="og:title" content="Session Messenger — Regional Communities">
+<meta
+	property="og:description"
+	content="Discover places to chat with people from your country!"
+>
+<meta property="og:type" content="website">
+<meta property="og:locale" content="en_US"/>

sites/groups/regional/index.php

@@ -0,0 +1,16 @@
+<?php
+	require_once '+getenv.php';
+	require_once 'php/utils/getopt.php';
+	require_once 'php/servers/room-database.php';
+	require_once 'sites/_fragment/+room-sieve.php';
+
+	$room_database = CommunityDatabase::read_from_file($ROOMS_FILE)->fetch_assets();
+	$listing_database = CommunityListingDatabase::resolve_listings_from_ini($LISTINGS_INI, $room_database->servers);
+	$rooms =
+		RoomSieve::takeRooms($listing_database->get_listing('regional')->rooms)
+			->saveStickies()
+			->applyPreferentialSort()
+			->getWithStickies();
+
+	include "+templates/index.php";
+?>

sites/groups/tech/+index.h1.php

@@ -0,0 +1 @@
+<h1 id="headline">Tech Session Communities</h1>

sites/groups/tech/+index.head.php

@@ -0,0 +1,15 @@
+<title>Tech Communities — sessioncommunities.online</title>
+<meta name="description" content="Chat in Session Communities! <?php
+	?>Use our list to join your favorite Community in Session Messenger. <?php
+	?>Copy public Session group links into the Session app!<?php
+?>">
+<?php
+?>
+<meta name="keywords" content="session communities,session groups,session group list,session chat">
+<meta property="og:title" content="Session Messenger — Regional Communities">
+<meta
+	property="og:description"
+	content="Tech Communities — chat in the Session app!"
+>
+<meta property="og:type" content="website">
+<meta property="og:locale" content="en_US"/>

sites/groups/tech/index.php

@@ -0,0 +1,16 @@
+<?php
+	require_once '+getenv.php';
+	require_once 'php/utils/getopt.php';
+	require_once 'php/servers/room-database.php';
+	require_once 'sites/_fragment/+room-sieve.php';
+
+	$room_database = CommunityDatabase::read_from_file($ROOMS_FILE)->fetch_assets();
+	$listing_database = CommunityListingDatabase::resolve_listings_from_ini($LISTINGS_INI, $room_database->servers);
+	$rooms =
+		RoomSieve::takeRooms($listing_database->get_listing('tech')->rooms)
+			->saveStickies()
+			->applyPreferentialSort()
+			->getWithStickies();
+
+	include "+templates/index.php";
+?>