refactor: name the profile connection lists with an enum

app/Enums/ConnectionType.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Enums;
+
+/**
+ * The lists of people on a profile: who follows them, who they follow, who of those follow them back, and which of
+ * their followers the viewer follows too.
+ */
+enum ConnectionType: string
+{
+    case Followers = 'followers';
+    case FollowersYouKnow = 'followers_you_know';
+    case Following = 'following';
+    case Mutuals = 'mutuals';
+}

app/Http/Controllers/UserFollowersController.php

@@ -4,6 +4,7 @@
 
 namespace App\Http\Controllers;
 
+use App\Enums\ConnectionType;
 use App\Http\Requests\ListUserFollowersRequest;
 use App\Models\User;
 use App\Services\PageMetadata;
@@ -23,12 +24,12 @@ public function index(ListUserFollowersRequest $request, #[CurrentUser] ?User $c
 
         return Inertia::render('user/connections', [
             'user' => fn (): User => $currentUser instanceof User ? $user : $getCountedUser(),
-            'type' => 'followers',
+            'type' => ConnectionType::Followers,
             'users' => Inertia::scroll(fn () => $user->followers()
                 ->withExists(['followers as is_followed' => fn (Builder $query): Builder => $currentUser instanceof User ? $query->whereKey($currentUser->id) : $query->whereRaw('1 = 0')])
                 ->latest('follows.created_at')
                 ->latest('users.id')
                 ->cursorPaginate(30)),
-        ])->withViewData(['preview' => $currentUser instanceof User || $request->inertia() ? null : $metadata->connections($getCountedUser(), 'followers')]);
+        ])->withViewData(['preview' => $currentUser instanceof User || $request->inertia() ? null : $metadata->connections($getCountedUser(), ConnectionType::Followers)]);
     }
 }

app/Http/Controllers/UserFollowersYouKnowController.php

@@ -4,6 +4,7 @@
 
 namespace App\Http\Controllers;
 
+use App\Enums\ConnectionType;
 use App\Http\Requests\ListUserFollowersYouKnowRequest;
 use App\Models\User;
 use App\Queries\FollowersYouKnowQuery;
@@ -18,7 +19,7 @@ public function index(ListUserFollowersYouKnowRequest $request, #[CurrentUser] U
     {
         return Inertia::render('user/connections', [
             'user' => $user,
-            'type' => 'followers_you_know',
+            'type' => ConnectionType::FollowersYouKnow,
             'users' => Inertia::scroll(fn () => $followersYouKnow->builder($user, $currentUser)
                 ->withExists(['followers as is_followed' => fn (Builder $query): Builder => $query->whereKey($currentUser->id)])
                 ->cursorPaginate(30)),

app/Http/Controllers/UserFollowingController.php

@@ -4,6 +4,7 @@
 
 namespace App\Http\Controllers;
 
+use App\Enums\ConnectionType;
 use App\Http\Requests\ListUserFollowingRequest;
 use App\Models\User;
 use App\Services\PageMetadata;
@@ -23,12 +24,12 @@ public function index(ListUserFollowingRequest $request, #[CurrentUser] ?User $c
 
         return Inertia::render('user/connections', [
             'user' => fn (): User => $currentUser instanceof User ? $user : $getCountedUser(),
-            'type' => 'following',
+            'type' => ConnectionType::Following,
             'users' => Inertia::scroll(fn () => $user->following()
                 ->withExists(['followers as is_followed' => fn (Builder $query): Builder => $currentUser instanceof User ? $query->whereKey($currentUser->id) : $query->whereRaw('1 = 0')])
                 ->latest('follows.created_at')
                 ->latest('users.id')
                 ->cursorPaginate(30)),
-        ])->withViewData(['preview' => $currentUser instanceof User || $request->inertia() ? null : $metadata->connections($getCountedUser(), 'following')]);
+        ])->withViewData(['preview' => $currentUser instanceof User || $request->inertia() ? null : $metadata->connections($getCountedUser(), ConnectionType::Following)]);
     }
 }

app/Http/Controllers/UserMutualsController.php

@@ -4,6 +4,7 @@
 
 namespace App\Http\Controllers;
 
+use App\Enums\ConnectionType;
 use App\Http\Requests\ListUserMutualsRequest;
 use App\Models\User;
 use App\Queries\UserConnectionsQuery;
@@ -28,7 +29,7 @@ public function index(ListUserMutualsRequest $request, #[CurrentUser] ?User $cur
 
         return Inertia::render('user/connections', [
             'user' => fn (): User => $currentUser instanceof User ? $user : $getCountedUser(),
-            'type' => 'mutuals',
+            'type' => ConnectionType::Mutuals,
             'users' => Inertia::scroll(function () use ($connections, $currentUser, $user) {
                 $mutuals = $connections->builder($user->following()
                     ->whereExists(fn (QueryBuilder $query): QueryBuilder => $query->from('follows', 'follows_back')
@@ -41,6 +42,6 @@ public function index(ListUserMutualsRequest $request, #[CurrentUser] ?User $cur
 
                 return $mutuals->cursorPaginate(30);
             }),
-        ])->withViewData(['preview' => $currentUser instanceof User || $request->inertia() ? null : $metadata->connections($getCountedUser(), 'mutuals')]);
+        ])->withViewData(['preview' => $currentUser instanceof User || $request->inertia() ? null : $metadata->connections($getCountedUser(), ConnectionType::Mutuals)]);
     }
 }

app/Services/PageMetadata.php

@@ -5,6 +5,7 @@
 namespace App\Services;
 
 use App\Enums\CommitStatus;
+use App\Enums\ConnectionType;
 use App\Models\Commit;
 use App\Models\LinkPreview;
 use App\Models\User;
@@ -300,26 +301,26 @@ public function user(User $user): array
     /**
      * The link preview of who follows a profile, who it follows, or who of those follow it back. The lists are thin pages, so they are not indexed, though their links are followed.
      *
-     * @param  'followers'|'following'|'mutuals'  $type
+     * @param  ConnectionType::Followers|ConnectionType::Following|ConnectionType::Mutuals  $type
      * @return ConnectionsMetadata
      */
-    public function connections(User $user, string $type): array
+    public function connections(User $user, ConnectionType $type): array
     {
         $title = match ($type) {
-            'followers' => "People following {$user->nameWithHandle()} on /dev/null",
-            'following' => "People followed by {$user->nameWithHandle()} on /dev/null",
-            'mutuals' => "Mutuals of {$user->nameWithHandle()} on /dev/null",
+            ConnectionType::Followers => "People following {$user->nameWithHandle()} on /dev/null",
+            ConnectionType::Following => "People followed by {$user->nameWithHandle()} on /dev/null",
+            ConnectionType::Mutuals => "Mutuals of {$user->nameWithHandle()} on /dev/null",
         };
 
         return [
             'type' => 'profile',
             'title' => $title,
             'description' => match ($type) {
-                'followers' => "See who follows {$user->mention()} on /dev/null, a social network for developers.",
-                'following' => "See who {$user->mention()} follows on /dev/null, a social network for developers.",
-                'mutuals' => "See who follows {$user->mention()} back on /dev/null, a social network for developers.",
+                ConnectionType::Followers => "See who follows {$user->mention()} on /dev/null, a social network for developers.",
+                ConnectionType::Following => "See who {$user->mention()} follows on /dev/null, a social network for developers.",
+                ConnectionType::Mutuals => "See who follows {$user->mention()} back on /dev/null, a social network for developers.",
             },
-            'url' => route("user-{$type}.index", $user),
+            'url' => route("user-{$type->value}.index", $user),
             'robots' => self::NOT_INDEXABLE,
             'images' => [$this->profileImage($user, $title)],
             'handle' => $user->handle,