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| 1 | <?php |
| 2 | |
| 3 | namespace App\Services\Stock; |
| 4 | |
| 5 | use App\Models\admin\Product; |
| 6 | use App\Models\ProductVariation; |
| 7 | |
| 8 | /** |
| 9 | * The §5.4 resolution matrix — "is this product's stock actually tracked, and |
| 10 | * how should the form / storefront treat it?". |
| 11 | * |
| 12 | * inventory_tracking | product.manage_stock | multi_warehouse/vendor | result |
| 13 | * ------------------ | -------------------- | ---------------------- | ------ |
| 14 | * OFF | — | — | none (manual availability) |
| 15 | * ON | OFF | — | none (manual availability) |
| 16 | * ON | ON | OFF | single (one quantity) |
| 17 | * ON | ON | ON | per_location (per-warehouse rows) |
| 18 | */ |
| 19 | class StockResolver |
| 20 | { |
| 21 | public const NONE = 'none'; |
| 22 | |
| 23 | public const SINGLE = 'single'; |
| 24 | |
| 25 | public const PER_LOCATION = 'per_location'; |
| 26 | |
| 27 | /** Master switch — is stock tracking on for the store at all? */ |
| 28 | public function globallyEnabled(): bool |
| 29 | { |
| 30 | return (bool) feature('inventory_tracking'); |
| 31 | } |
| 32 | |
| 33 | /** Is THIS product's quantity tracked right now? */ |
| 34 | public function isTracked(Product $product): bool |
| 35 | { |
| 36 | return $this->globallyEnabled() && (bool) $product->manage_stock; |
| 37 | } |
| 38 | |
| 39 | /** What the product form / storefront should render for stock. */ |
| 40 | public function displayMode(Product $product): string |
| 41 | { |
| 42 | if (! $this->isTracked($product)) { |
| 43 | return self::NONE; |
| 44 | } |
| 45 | |
| 46 | return (feature('multi_warehouse') || feature('multi_vendor')) |
| 47 | ? self::PER_LOCATION |
| 48 | : self::SINGLE; |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Can the shopper buy `$qty` of this product? Untracked products use |
| 53 | * manual availability. Tracked products require sufficient on-hand quantity. |
| 54 | */ |
| 55 | public function canSell(Product $product, int $qty = 1, ?ProductVariation $variation = null): bool |
| 56 | { |
| 57 | if ($qty < 1 || ($variation && (int) $variation->product_id !== (int) $product->id)) { |
| 58 | return false; |
| 59 | } |
| 60 | if (! $this->isTracked($product)) { |
| 61 | return $product->stock_status === 'in_stock' |
| 62 | && (! $variation || $variation->stock_status === 'in_stock'); |
| 63 | } |
| 64 | if ($product->stock_status !== 'in_stock') { |
| 65 | return false; |
| 66 | } |
| 67 | if ($variation) { |
| 68 | return $variation->stock_status === 'in_stock' && (int) $variation->stock_quantity >= $qty; |
| 69 | } |
| 70 | if ($product->variations->isNotEmpty()) { |
| 71 | return $product->variations->contains(fn ($v) => $this->canSell($product, $qty, $v)); |
| 72 | } |
| 73 | |
| 74 | return (int) $product->stock >= $qty; |
| 75 | } |
| 76 | } |