From 004a8517e42cf0c74524da6782c9512849f36883 Mon Sep 17 00:00:00 2001
From: Vladimir Bryzgalov <vladimir.bryzgalov@gmail.com>
Date: Sat, 16 May 2026 19:59:00 +0500
Subject: [PATCH] feat(wpmc S4): Router::route internal page + page_unic swap

---
 includes/class-router.php | 10 +++++-
 tests/RouterTest.php      | 68 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 77 insertions(+), 1 deletion(-)

diff --git a/includes/class-router.php b/includes/class-router.php
index 6ea5060..88b3f2f 100644
--- a/includes/class-router.php
+++ b/includes/class-router.php
@@ -60,7 +60,15 @@ final class Router
             return;
         }
 
-        // Internal page handling lands in Task 13.
+        $page_id = \url_to_postid($url_original);
+        if (!$page_id) {
+            return;
+        }
+        $swap = Helpers::page_unic_swap($page_id, $town_slug);
+        if ($swap !== null) {
+            $page_id = $swap;
+        }
+        self::install_query($page_id, $town_slug, false);
     }
 
     private static function strip_town_prefix(string $uri, string $town_slug): string
diff --git a/tests/RouterTest.php b/tests/RouterTest.php
index f250fc6..d590423 100644
--- a/tests/RouterTest.php
+++ b/tests/RouterTest.php
@@ -166,4 +166,72 @@ final class RouterTest extends TestCase
 
         self::assertArrayNotHasKey('wp_query', $GLOBALS);
     }
+
+    public function test_route_resolves_internal_page_via_url_to_postid(): void
+    {
+        \Brain\Monkey\Functions\when('is_admin')->justReturn(false);
+        $_SERVER['REQUEST_URI'] = '/tyumen/about/';
+        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => 'tyumen']);
+        \Brain\Monkey\Functions\when('get_field')->alias(function ($name) {
+            if ($name === 'main_town_slug') return 'spb';
+            return false;
+        });
+        \Brain\Monkey\Functions\when('get_term_by')->justReturn(false);
+        \Brain\Monkey\Functions\expect('url_to_postid')
+            ->once()
+            ->with('/about/')
+            ->andReturn(42);
+        \Brain\Monkey\Functions\when('get_post')->justReturn((object) ['ID' => 42]);
+        \Brain\Monkey\Functions\when('status_header')->justReturn(null);
+
+        Router::route();
+
+        self::assertSame(42, $GLOBALS['wp_query']->constructor_args['page_id']);
+        self::assertSame('tyumen', $GLOBALS['wp_query']->constructor_args['town']);
+        self::assertTrue($GLOBALS['wp_query']->is_page);
+    }
+
+    public function test_route_applies_page_unic_swap_when_clone_exists(): void
+    {
+        \Brain\Monkey\Functions\when('is_admin')->justReturn(false);
+        $_SERVER['REQUEST_URI'] = '/tyumen/about/';
+        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => 'tyumen']);
+
+        $term = new \WP_Term();
+        $term->term_id = 11;
+        $term->slug = 'tyumen';
+        \Brain\Monkey\Functions\when('get_term_by')->justReturn($term);
+
+        \Brain\Monkey\Functions\when('get_field')->alias(function ($name) {
+            if ($name === 'main_town_slug') return 'spb';
+            if ($name === 'page_unic') return [
+                ['town' => 11, 'page_old' => 42, 'page_new' => 84],
+            ];
+            return false;
+        });
+        \Brain\Monkey\Functions\when('url_to_postid')->justReturn(42);
+        \Brain\Monkey\Functions\when('get_post')->justReturn((object) ['ID' => 84]);
+        \Brain\Monkey\Functions\when('status_header')->justReturn(null);
+
+        Router::route();
+
+        self::assertSame(84, $GLOBALS['wp_query']->constructor_args['page_id']);
+    }
+
+    public function test_route_does_not_install_query_when_url_to_postid_returns_zero(): void
+    {
+        \Brain\Monkey\Functions\expect('get_post')->never();
+        \Brain\Monkey\Functions\when('is_admin')->justReturn(false);
+        $_SERVER['REQUEST_URI'] = '/tyumen/unknown/';
+        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => 'tyumen']);
+        \Brain\Monkey\Functions\when('get_field')->alias(function ($name) {
+            if ($name === 'main_town_slug') return 'spb';
+            return false;
+        });
+        \Brain\Monkey\Functions\when('url_to_postid')->justReturn(0);
+
+        Router::route();
+
+        self::assertArrayNotHasKey('wp_query', $GLOBALS);
+    }
 }