account pages: login, order history, order details, account details, wishlist

app/Services/GuestOrderClaimer.php

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+<?php
+
+namespace App\Services;
+
+use Illuminate\Contracts\Auth\Authenticatable;
+use Lunar\Models\Order;
+
+/**
+ * Attaches placed guest orders to an account when their billing email matches
+ * the account's email. Only ever called right after the shopper has proved
+ * they own that email (a login code, or the code confirming an email change),
+ * which is what makes matching on email safe.
+ *
+ * Orders already belonging to any customer or user are never touched.
+ */
+class GuestOrderClaimer
+{
+    public function claim(Authenticatable $user): int
+    {
+        $customer = $user->latestCustomer();
+
+        if (! $customer || ! $user->email) {
+            return 0;
+        }
+
+        return Order::query()
+            ->whereNotNull('placed_at')
+            ->whereNull('customer_id')
+            ->whereNull('user_id')
+            ->whereHas('billingAddress', fn ($query) => $query
+                ->whereRaw('lower(contact_email) = ?', [strtolower($user->email)]))
+            ->update([
+                'customer_id' => $customer->id,
+                'user_id' => $user->id,
+            ]);
+    }
+}

app/Services/Wishlist.php

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+<?php
+
+namespace App\Services;
+
+use App\Models\WishlistItem;
+use Illuminate\Contracts\Auth\Authenticatable;
+use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\Cookie;
+
+/**
+ * The current shopper's wishlist, product ids only.
+ *
+ * Logged in: rows in wishlist_items. Guest: a 1-year cookie holding the ids
+ * (encrypted like every cookie, by the web group's EncryptCookies), so nothing
+ * is written to the database for anonymous visitors. On login the cookie is
+ * merged into the account and cleared (MergeGuestWishlistOnLogin).
+ */
+class Wishlist
+{
+    public const COOKIE = 'wishlist';
+
+    private const COOKIE_MINUTES = 60 * 24 * 365;
+
+    // Keeps the cookie well under the 4KB browser limit.
+    private const GUEST_MAX = 100;
+
+    /** @var array<int>|null ids for this request, including a toggle just made */
+    private ?array $guestIds = null;
+
+    /** @return array<int> newest first */
+    public function ids(): array
+    {
+        if ($user = Auth::user()) {
+            return WishlistItem::where('user_id', $user->id)
+                ->latest('id')
+                ->pluck('product_id')
+                ->all();
+        }
+
+        return $this->guestIds();
+    }
+
+    public function has(int $productId): bool
+    {
+        return in_array($productId, $this->ids(), true);
+    }
+
+    /**
+     * @return bool whether the product is on the wishlist afterwards
+     */
+    public function toggle(int $productId): bool
+    {
+        if ($user = Auth::user()) {
+            $deleted = WishlistItem::where('user_id', $user->id)->where('product_id', $productId)->delete();
+
+            if ($deleted) {
+                return false;
+            }
+
+            WishlistItem::create(['user_id' => $user->id, 'product_id' => $productId]);
+
+            return true;
+        }
+
+        $ids = $this->guestIds();
+
+        if (in_array($productId, $ids, true)) {
+            $this->storeGuestIds(array_values(array_diff($ids, [$productId])));
+
+            return false;
+        }
+
+        $this->storeGuestIds(array_slice([$productId, ...$ids], 0, self::GUEST_MAX));
+
+        return true;
+    }
+
+    public function remove(int $productId): void
+    {
+        if ($this->has($productId)) {
+            $this->toggle($productId);
+        }
+    }
+
+    /**
+     * Moves the guest cookie's products onto $user's wishlist and clears it.
+     */
+    public function mergeGuestInto(Authenticatable $user): void
+    {
+        $ids = $this->guestIds();
+
+        if ($ids === []) {
+            return;
+        }
+
+        // Oldest first, so the newest cookie item also ends up newest here.
+        foreach (array_reverse($ids) as $productId) {
+            WishlistItem::firstOrCreate(['user_id' => $user->id, 'product_id' => $productId]);
+        }
+
+        $this->guestIds = [];
+        Cookie::queue(Cookie::forget(self::COOKIE));
+    }
+
+    /** @return array<int> */
+    private function guestIds(): array
+    {
+        if ($this->guestIds !== null) {
+            return $this->guestIds;
+        }
+
+        $decoded = json_decode((string) request()->cookie(self::COOKIE), true);
+
+        return $this->guestIds = is_array($decoded)
+            ? array_values(array_unique(array_filter(array_map('intval', $decoded))))
+            : [];
+    }
+
+    /** @param  array<int>  $ids */
+    private function storeGuestIds(array $ids): void
+    {
+        $this->guestIds = $ids;
+
+        Cookie::queue(self::COOKIE, json_encode($ids), self::COOKIE_MINUTES);
+    }
+}