first commit

common/Votes/StoreVote.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace Common\Votes;
+
+use Auth;
+use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Str;
+
+class StoreVote
+{
+    public function execute($model, string $newVoteType, ?string $userIp)
+    {
+        $userId = Auth::id();
+
+        // if we can't match current user, bail
+        if (!$userId && !$userIp) {
+            return null;
+        }
+
+        $currentVote = $model
+            ->votes()
+            ->where(
+                fn(Builder $query) => $query
+                    ->where('user_id', $userId)
+                    ->orWhere('user_ip', $userIp),
+            )
+            ->first();
+
+        // remove old vote from this user
+        if ($currentVote) {
+            $this->deleteCurrentVote($model, $currentVote);
+        }
+
+        // create a new rating
+        if (!$currentVote || $currentVote->vote_type !== $newVoteType) {
+            $this->storeVote($model, $newVoteType, $userId, $userIp);
+        }
+
+        return $model;
+    }
+
+    private function deleteCurrentVote($model, Vote $vote): void
+    {
+        $column = Str::plural($vote->vote_type);
+        if ($model->$column > 0) {
+            $model->decrement($column);
+        }
+        $vote->delete();
+    }
+
+    private function storeVote(
+        $model,
+        string $voteType,
+        ?int $userId,
+        ?string $userIp,
+    ): void
+    {
+        $model->votes()->create([
+            'vote_type' => $voteType,
+            'user_id' => $userId,
+            'user_ip' => $userIp,
+        ]);
+
+        $model->increment(Str::plural($voteType), 1);
+    }
+}