can match

app/Models/Participant.php

@@ -23,12 +23,12 @@ class Participant extends Model
         'desperate' => 'boolean',
     ];
 
-    public function giver()
+    public function receiver()
     {
         return $this->belongsTo(Participant::class, 'giving_id');
     }
 
-    public function receiver()
+    public function giver()
     {
         return $this->hasOne(Participant::class, 'giving_id', 'id');
     }

app/Services/MatcherService.php

@@ -0,0 +1,105 @@
+<?php
+namespace App\Services;
+
+use App\Models\Participant;
+use Illuminate\Support\Collection;
+
+class MatcherService
+{
+    public function match(): void
+    {
+        $participants = Participant::all();
+
+        if ($participants->count() < 2) {
+            return;
+        }
+
+        // desperate denotes a user A that is supposed to give to a user B that dropped out
+        // whilst user A has a user C giving to them, or vice versa
+        $desperate     = $participants->where('desperate', true)->values();
+        $nonDesperate  = $participants->where('desperate', false)->values();
+
+        $desperate     = $desperate->shuffle();
+        $nonDesperate  = $nonDesperate->shuffle();
+
+        $assignments = [];
+
+        /*
+        |--------------------------------------------------------------------------
+        | 1. Match DESPERATE participants
+        |--------------------------------------------------------------------------
+        | A desperate user should match:
+        |   - First to another desperate participant
+        |   - If none left, match to a non-desperate participant
+        |--------------------------------------------------------------------------
+        */
+
+        foreach ($desperate as $p) {
+            // Exclude self from possible options
+            $pool = $desperate->filter(fn($d) => $d->id !== $p->id);
+
+            if ($pool->isEmpty()) {
+                $pool = $nonDesperate;
+            }
+
+            if ($pool->isEmpty()) {
+                continue;
+            }
+
+            $candidate = $this->pickValidTarget($p, $pool, $assignments);
+            if ($candidate) {
+                $assignments[$p->id] = $candidate->id;
+            }
+        }
+
+        /*
+        |--------------------------------------------------------------------------
+        | 2. Match NON-DESPERATE participants
+        |--------------------------------------------------------------------------
+        | A non-desperate participant always matches to the non-desperate pool.
+        |--------------------------------------------------------------------------
+        */
+
+        foreach ($nonDesperate as $p) {
+            // Exclude self
+            $pool = $nonDesperate->filter(fn($d) => $d->id !== $p->id);
+
+            if ($pool->isEmpty()) {
+                continue;
+            }
+
+            $candidate = $this->pickValidTarget($p, $pool, $assignments);
+            if ($candidate) {
+                $assignments[$p->id] = $candidate->id;
+            }
+        }
+
+        /*
+        |--------------------------------------------------------------------------
+        | 3. Write all results back to DB
+        |--------------------------------------------------------------------------
+        */
+
+        foreach ($assignments as $id => $givingId) {
+            Participant::where('id', $id)->update([
+                'giving_id' => $givingId,
+            ]);
+        }
+    }
+
+    private function pickValidTarget(Participant $giver, Collection $pool, array $assignments): ?Participant
+    {
+        $shuffled = $pool->shuffle();
+
+        // Avoid duplicates
+        foreach ($shuffled as $candidate) {
+            if (($assignments[$candidate->id] ?? null) === $giver->id) {
+                continue;
+            }
+
+            return $candidate;
+        }
+
+        return null;
+    }
+}

resources/views/livewire/pages/profile.blade.php

@@ -8,6 +8,8 @@ state(['token'])->url();
 state([
     'participant' => null,
     'userData' => null,
+    'receiverPrompt' => null,
+    'receiverUserData' => null,
     'prompt' => '',
     'isEditing' => false,
 ]);
@@ -23,6 +25,10 @@ mount(function () {
         if ($this->participant) {
             $this->userData = $this->participant->getUserData();
             $this->prompt = $this->participant->prompt ?? '';
+            if($this->participant->receiver) {
+                $this->receiverPrompt = $this->participant->receiver->prompt;
+                $this->receiverUserData = $this->participant->receiver->getUserData();
+            }
         }
     }
 });
@@ -82,6 +88,11 @@ $cancel = function () {
 
         @if($participant->giving_id)
             You are giving to <p>{{ $participant->giving_id }}</p>
+            @if($receiverUserData)
+                <img src ="{{ $receiverUserData['data']['profile_image_url'] ?? '' }}">
+                <h1> {{ $receiverUserData['data']['username'] ?? 'Unknown' }}</h1>
+            @endif
+             {{ "Their prompt is... {$receiverPrompt}" ?: 'No prompt set yet.' }}
         @elseif($participant->desperate)
             <p>You're in a bind!</p>
         @else

resources/views/livewire/pages/table.blade.php

@@ -1,8 +1,9 @@
 <?php
 
 use App\Models\Participant;
+use App\Services\MatcherService;
 use Illuminate\Database\Eloquent\Collection;
-use function Livewire\Volt\{state, mount, rules};
+use function Livewire\Volt\{state, mount};
 
 state(['participants' => Collection::class]);
 
@@ -10,14 +11,47 @@ mount(function () {
     $this->participants = Participant::all();
 });
 
+$runMatch = function () {
+    $matcher = app(MatcherService::class);
+    $matcher->match();
+
+    session()->flash('match-message',"Done");
+
+        $this->participants = Participant::all();
+};
 ?>
 
 <div class="p-6 bg-gray-100 min-h-screen">
     <div class="max-w-7xl mx-auto">
 
+        <div class="flex justify-between items-center mb-6">
+            <h1 class="text-3xl font-extrabold text-gray-900">All Participants Data</h1>
+
+            <button
+                wire:click="runMatch"
+                wire:loading.attr="disabled"
+                wire:target="runMatch"
+                class="px-4 py-2 bg-indigo-600 text-white font-semibold rounded-lg shadow-md hover:bg-indigo-700 transition duration-150 disabled:opacity-50"
+            >
+                <span wire:loading wire:target="runMatch">Processing Match...</span>
+                <span wire:loading.remove wire:target="runMatch">Run Matcher Service</span>
+            </button>
+        </div>
+
+        <p class="text-gray-600 mb-4">
+            Displaying all records from the `participants` table.
+        </p>
+
+        @if (session()->has('match-message'))
+            <div class="bg-green-100 border-l-4 border-green-500 text-green-700 p-4 mb-4 rounded" role="alert">
+                <p class="font-bold">Success!</p>
+                <p>{{ session('match-message') }}</p>
+            </div>
+        @endif
+
         @if($participants->isEmpty())
             <div class="p-4 text-center text-gray-500 bg-white shadow rounded-lg">
-                No record
+                No records
             </div>
         @else
             <div class="shadow overflow-hidden border-b border-gray-200 sm:rounded-lg">
@@ -53,10 +87,10 @@ mount(function () {
                             </td>
 
                             <td class="px-6 py-4 whitespace-nowrap text-sm">
-                                <span class="px-2 inline-flex text-xs leading-5 font-semibold rounded-full
+                            <span class="px-2 inline-flex text-xs leading-5 font-semibold rounded-full
-                                    {{ $participant->desperate ? 'bg-red-100 text-red-800' : 'bg-green-100 text-green-800' }}">
+                                {{ $participant->desperate ? 'bg-red-100 text-red-800' : 'bg-green-100 text-green-800' }}">
-                                    {{ $participant->desperate ? 'YES' : 'No' }}
+                                {{ $participant->desperate ? 'YES' : 'No' }}
-                                </span>
+                            </span>
                             </td>
 
                             <td class="px-6 py-4 text-sm font-mono text-gray-500 truncate" title="{{ $participant->token }}">
@@ -69,6 +103,3 @@ mount(function () {
             </div>
         @endif
     </div>
-
-
-</div>