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Edit File: CouponService.php

<?php

namespace App\Services;

use App\Models\Coupon;

class CouponService extends BaseService
{

public function __construct()
    {
        parent::__construct(Coupon::class);
    }

static function checkCoupon($coupon_num, $total_price = null)
    {
        if (!$coupon = Coupon::whereCouponNum($coupon_num)->first()) {
            return ['msg' => __('apis.not_avilable_coupon'), 'key' => 'fail'];
        }
        if ('ratio' != $coupon->type && $total_price < $coupon->discount) {
            return ['msg' => __('apis.not_avilable_coupon_for_amount'), 'key' => 'fail'];
        }
        if ($coupon->status == 'closed') {
            return ['msg' => __('apis.not_avilable_coupon'), 'key' => 'fail'];
        }
        if ($coupon->max_use <= $coupon->use_times) {
            return ['msg' => __('apis.not_avilable_coupon'), 'key' => 'fail'];
        }
        if ($coupon->status == 'usage_end') {
            return ['msg' => __('apis.max_usa_coupon'), 'key' => 'fail'];
        }

if ($coupon->expire_date < today() || $coupon->status == 'expire') {
            return ['msg' => __('apis.coupon_end_at', ['date' => date('d-m-Y  h:i A', strtotime($coupon->expire_date))]), 'key' => 'fail'];
        }
        if ($coupon->start_date > today()) {
            return ['msg' => __('apis.coupon_start_at', ['date' => date('d-m-Y  h:i A', strtotime($coupon->start_date))]), 'key' => 'fail'];
        }

if ('ratio' == $coupon->type) {
            $disc_amount = $coupon->discount * $total_price / 100;
            if ($disc_amount > $coupon->max_discount) {
                $disc_amount = $coupon->max_discount;
            }
        } else {
            $disc_amount = $coupon->discount;
        }

return [
            'msg'  => __('apis.disc_amount') . ' ' . $disc_amount . ' ' . __('apis.rs'),
            'key'  => 'success',
            'data' => [
                'disc_amount' => $disc_amount,
                'coupon'      => $coupon->only(['type', 'discount', 'id'])
            ]
        ];
    }
}

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