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<?php |
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namespace FluentCart\App\Services\Coupon\Concerns; |
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|
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use FluentCart\Api\CurrencySettings; |
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use FluentCart\Api\Resource\FrontendResource\CartResource; |
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use FluentCart\App\App; |
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use FluentCart\App\Helpers\Helper; |
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use FluentCart\App\Models\Coupon; |
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use FluentCart\Framework\Support\Arr; |
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use FluentCart\Framework\Support\Collection; |
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|
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trait CanCalculateLineTotal |
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{ |
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protected array $discountData = []; |
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|
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public function calculateLineItems() |
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{ |
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$lineItems = $this->prepareLineItems($this->lineItems); |
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|
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$this->discountData = []; |
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// $firstTime determines whether to use the original price or the discounted price as the current price for calculations |
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|
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foreach ($this->applicableCoupons as $coupon) { |
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$validated = $this->validate($coupon->code); |
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if (is_wp_error($validated)) { |
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$this->couponErrors->put($coupon->code, $validated); |
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continue; |
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} |
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|
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$this->applyCouponToAllItems($coupon, $lineItems); |
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$this->previouslyAppliedCouponCodes[] = $coupon->code; |
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$this->previouslyAppliedCoupons->put($coupon->code, $coupon); |
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} |
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|
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$this->formatDiscountNumbers(); |
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$this->calculatedLineItems = $lineItems; |
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|
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} |
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|
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protected function prepareLineItems(array $lineItems = []): array |
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{ |
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foreach ($lineItems as $index => $lineItem) { |
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$lineItems[$index]['price'] = $lineItem['unit_price']; |
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$lineItems[$index]['discount_total'] = 0; |
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} |
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|
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return $lineItems; |
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} |
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|
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protected function formatDiscountNumbers() |
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{ |
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foreach ($this->discountData as $code => $discount) { |
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$formattedTitle = $code; |
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|
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if ($discount['type'] === 'percentage') { |
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$formattedTitle .= ' (' . $discount['actual_amount'] . '%)'; |
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} |
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|
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$this->discountData[$code]['formatted_discount'] = CurrencySettings::getPriceHtml($discount['discount']); |
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$this->discountData[$code]['actual_formatted_discount'] = CurrencySettings::getPriceHtml( |
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$discount['discount'] |
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); |
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$this->discountData[$code]['formatted_title'] = $formattedTitle; |
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|
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} |
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} |
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|
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public function getDiscountData(): array |
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{ |
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return $this->discountData; |
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} |
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|
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private function applyCouponToAllItems(Coupon $coupon, array &$lineItems) |
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{ |
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$this->ensureCouponExistInDiscountData($coupon); |
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|
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$filteredItems = Collection::make($lineItems)->filter(function ($item) use ($coupon) { |
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return $this->isApplicableToProduct($coupon, $item['post_id'], $item['id']); |
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}); |
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|
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$totalNetPrice = $filteredItems->reduce(function ($carry, $item) { |
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return $carry + (($item['unit_price'] * $item['quantity']) - $item['discount_total']); |
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}, 0); |
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|
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$applicableAmount = $this->calculateApplicableAmount($coupon, $totalNetPrice); |
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|
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$lineItems = Collection::make($lineItems)->keyBy('id')->toArray(); |
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|
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|
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$discountAmount = $this->distributeDiscount($filteredItems, $lineItems, $applicableAmount); |
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|
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$this->discountData[$coupon->code]['discount'] += round($discountAmount, 2); |
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$this->discountData[$coupon->code]['unit_amount'] = round($discountAmount, 2); |
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$this->discountData[$coupon->code]['actual_quantity'] = $filteredItems->sum('quantity'); |
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|
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} |
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|
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private function distributeDiscount(Collection $filteredItems, array &$lineItems, float &$remainingDiscount, int $depth = 0): float |
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{ |
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$totalApplied = 0; |
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$totalNetPrice = $filteredItems->reduce(function ($carry, $item) use ($lineItems) { |
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$id = $item['id']; |
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$line = Arr::get($lineItems, $id); |
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|
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if (empty($line)) { |
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return $carry; |
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} |
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return $carry + (($line['unit_price'] * $line['quantity']) - $line['discount_total']); |
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}, 0); |
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if ($totalNetPrice <= 0 || $remainingDiscount <= 0.01 || $depth > 10) { |
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return 0; |
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} |
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|
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foreach ($filteredItems as $item) { |
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$id = $item['id']; |
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if (!isset($lineItems[$id])) continue; |
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|
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$lineItem = &$lineItems[$id]; |
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$itemNetTotal = ($lineItem['unit_price'] * $lineItem['quantity']) - $lineItem['discount_total']; |
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if ($itemNetTotal <= 0) { |
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continue; |
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} |
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|
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$itemShare = ($itemNetTotal / $totalNetPrice) * $remainingDiscount; |
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$itemShare = round($itemShare, 2); |
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|
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$applied = min($itemShare, $itemNetTotal, $remainingDiscount); |
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$lineItem['discount_total'] += $applied; |
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$remainingDiscount -= $applied; |
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$totalApplied += $applied; |
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|
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if ($remainingDiscount <= 0.01) { |
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break; |
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} |
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} |
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|
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// Recursive call if leftover remains and there's still room |
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if ($remainingDiscount > 0.01) { |
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$totalApplied += $this->distributeDiscount($filteredItems, $lineItems, $remainingDiscount, $depth + 1); |
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} |
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return $totalApplied; |
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} |
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|
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public function calculateApplicableAmount(Coupon $coupon, $totalPrice) |
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{ |
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$amount = $coupon->amount; |
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|
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$cart = CartResource::get([ |
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'hash' => App::request()->get(Helper::INSTANT_CHECKOUT_URL_PARAM) |
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]); |
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|
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if ($cart) { |
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$upgradeDiscount = Arr::get($cart, 'checkout_data.manual_discount.amount', 0); |
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$totalPrice = $totalPrice - $upgradeDiscount; |
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if ($totalPrice < 0) { |
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$totalPrice = 0; |
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} |
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} |
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if ($coupon->type === 'percentage') { |
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$amount = ($amount / 100) * $totalPrice; |
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} |
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$maxAmount = Arr::get($coupon->conditions, 'max_discount_amount', 0); |
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if (!empty($maxAmount) && is_numeric($maxAmount)) { |
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return min($totalPrice, $amount, $maxAmount); |
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} |
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return min($totalPrice, $amount); |
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} |
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|
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} |
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