From 3ec7cda79011eb8e3f95817467b2cb73884f40a4 Mon Sep 17 00:00:00 2001
From: Ovidiu U <nonreal@gmail.com>
Date: Wed, 22 Apr 2026 12:36:39 +0100
Subject: [PATCH] feat: derive outcode centroids from postcodes during import

---
 app/Console/Commands/ImportPostcodes.php      |  6 ++++++
 tests/Feature/Console/ImportPostcodesTest.php | 21 +++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/app/Console/Commands/ImportPostcodes.php b/app/Console/Commands/ImportPostcodes.php
index c4fdd90..cfa6c7d 100644
--- a/app/Console/Commands/ImportPostcodes.php
+++ b/app/Console/Commands/ImportPostcodes.php
@@ -109,7 +109,13 @@ final class ImportPostcodes extends Command
 
         fclose($handle);
 
+        DB::statement(
+            'INSERT INTO outcodes (outcode, lat, lng)
+             SELECT outcode, AVG(lat), AVG(lng) FROM postcodes GROUP BY outcode'
+        );
+
         $this->info("Imported {$imported} postcodes.");
+        $this->info('Derived '.DB::table('outcodes')->count().' outcode centroids.');
 
         return self::SUCCESS;
     }
diff --git a/tests/Feature/Console/ImportPostcodesTest.php b/tests/Feature/Console/ImportPostcodesTest.php
index b8288ca..3d60e68 100644
--- a/tests/Feature/Console/ImportPostcodesTest.php
+++ b/tests/Feature/Console/ImportPostcodesTest.php
@@ -1,5 +1,6 @@
 <?php
 
+use App\Models\Outcode;
 use App\Models\Postcode;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 
@@ -61,3 +62,23 @@ CSV;
     expect(Postcode::count())->toBe(1)
         ->and(Postcode::find('BT11AA'))->toBeNull();
 });
+
+it('derives outcode centroids as the average of member postcodes', function (): void {
+    $csv = <<<'CSV'
+pcd,pcds,doterm,lat,long
+"PE71AA","PE7 1AA","",52.500000,-0.200000
+"PE71AB","PE7 1AB","",52.600000,-0.220000
+"M11AD","M1 1AD","",53.480957,-2.237428
+CSV;
+
+    $path = writeOnspdFixture($csv);
+
+    $this->artisan('postcodes:import', ['--file' => $path])->assertSuccessful();
+
+    $pe7 = Outcode::find('PE7');
+
+    expect($pe7)->not->toBeNull()
+        ->and(round((float) $pe7->lat, 6))->toBe(52.550000)
+        ->and(round((float) $pe7->lng, 6))->toBe(-0.210000)
+        ->and(Outcode::find('M1'))->not->toBeNull();
+});