Patch for allowing admins to create Dokan coupons.

allow-admin-coupons-fix.patch

From 962ea6ad8940dc9339423e1fbc7e01a40db75c99 Mon Sep 17 00:00:00 2001
From: TJ <trajche@kralev.eu>
Date: Thu, 23 Apr 2020 02:52:55 +0300
Subject: [PATCH] applying fix from
 https://github.com/weDevsOfficial/dokan/pull/685

---
 includes/Admin/Settings.php  |  11 ++
 includes/Commission.php      |   6 +-
 includes/Order/Hooks.php     |  86 +++++++++++++-
 includes/Order/functions.php | 209 ++++++++++++++++++++++++++++++++++-
 includes/functions.php       |  11 ++
 templates/orders/details.php |   9 +-
 6 files changed, 324 insertions(+), 8 deletions(-)

diff --git a/includes/Admin/Settings.php b/includes/Admin/Settings.php
index f98ffa6..7c21424 100644
--- a/includes/Admin/Settings.php
+++ b/includes/Admin/Settings.php
@@ -348,6 +348,17 @@ class Settings {
                 'options' => array( 'seller' => __( 'Vendor', 'dokan-lite' ), 'admin' => __( 'Admin', 'dokan-lite' ) ),
                 'default' => 'seller'
             ),
+            'admin_coupon_bearer' => array(
+                'name'    => 'admin_coupon_bearer',
+                'label'   => __( 'Admin Coupon', 'dokan-lite' ),
+                'desc'    => __( 'Who will bear the coupon discount created by Admin', 'dokan-lite' ),
+                'type'    => 'select',
+                'options' => array(
+                    'admin'  => __( 'Admin', 'dokan-lite' ),
+                    'vendor' => __( 'Vendor', 'dokan-lite' ),
+                ),
+                'default' => 'admin'
+            ),
         ) );
 
         $selling_option_vendor_capability = apply_filters( 'dokan_settings_selling_option_vendor_capability', array(
diff --git a/includes/Commission.php b/includes/Commission.php
index 5ddac9f..5d610f9 100644
--- a/includes/Commission.php
+++ b/includes/Commission.php
@@ -147,7 +147,7 @@ class Commission {
      *
      * @return float|null on failure
      */
-    public function get_earning_by_order( $order, $context = 'seller' ) {
+    public function get_earning_by_order( $order, $context = 'seller', $force = false ) {
         if ( ! $order instanceof \WC_Order ) {
             $order = wc_get_order( $order );
         }
@@ -172,7 +172,7 @@ class Commission {
         // Set user passed `order_id` so that we can track if any commission_rate has been saved previously.
         // Specially on order table `re-generation`.
         $this->set_order_id( $order->get_id() );
-        $earning = $this->get_earning_from_order_table( $order->get_id(), $context );
+        $earning = ! $force ? $this->get_earning_from_order_table( $order->get_id(), $context ) : null;
 
         if ( ! is_null( $earning ) ) {
             return $earning;
@@ -194,7 +194,7 @@ class Commission {
             if ( $refund ) {
                 $earning += $this->get_earning_by_product( $product_id, $context, $item->get_total() - $refund );
             } else {
-                $earning += $this->get_earning_by_product( $product_id, $context, $item->get_total() );
+                $earning += $this->get_earning_by_product( $product_id, $context, ! $force ? $item->get_total() : $item->get_subtotal() );
             }
         }
 
diff --git a/includes/Order/Hooks.php b/includes/Order/Hooks.php
index 6b3ac39..0789985 100644
--- a/includes/Order/Hooks.php
+++ b/includes/Order/Hooks.php
@@ -32,15 +32,15 @@ class Hooks {
         // order table synced for dokan update order meta
         add_action( 'dokan_checkout_update_order_meta', 'dokan_sync_insert_order' );
 
-        // prevent non-vendor coupons from being added
-        add_filter( 'woocommerce_coupon_is_valid', array( $this, 'ensure_vendor_coupon' ), 10, 2 );
-
         if ( is_admin() ) {
             add_action( 'woocommerce_process_shop_order_meta', 'dokan_sync_insert_order' );
         }
 
         // restore order stock if it's been reduced by twice
         add_action( 'woocommerce_reduce_order_stock', array( $this, 'restore_reduced_order_stock' ) );
+
+        // Adjust vendor balance if admin coupon is being applied on an order
+        add_filter( 'dokan_order_net_amount', array( $this, 'maybe_add_admin_discount_to_vendor_balance' ), 10, 2 );
     }
 
     /**
@@ -155,6 +155,86 @@ class Hooks {
         dokan()->order->maybe_split_orders( $parent_order_id );
     }
 
+    /**
+     * Maybe add admin discount to vendor_balance
+     *
+     * @since  DOKAN_LITE_SINCE
+     *
+     * @param  float $net_amount
+     * @param  WC_Order $sub_order
+     *
+     * @return float
+     */
+    public function maybe_add_admin_discount_to_vendor_balance( $net_amount, $sub_order ) {
+        // If marketplace doesn't bear the discount created by admin, don't need to add the balace to vendor account.
+        if ( 'admin' !== dokan_get_admin_coupon_discount_bearer() ) {
+            return $net_amount;
+        }
+
+        $admin_coupon_data = dokan_get_admin_coupon_data_from_order( $sub_order );
+
+        if ( empty( $admin_coupon_data['discount'] ) ) {
+            return $net_amount;
+        }
+
+        if ( ! dokan_is_suborder( $sub_order ) ) {
+            /**
+             * Admin coupon is fully applied on this main order. So we'll remove the coupon first from this order.
+             *
+             * @since DOKAN_LITE_SINCE
+             */
+            $coupons = $admin_coupon_data['coupons'];
+
+            foreach ( $coupons as $coupon_code ) {
+                $sub_order->remove_coupon( wc_format_coupon_code( $coupon_code ) );
+            }
+        } else {
+            /**
+             * Admin coupon is not fully applied on sub-orders but the discount has been calculated.
+             * So we'll call WC_Order::recalculate_coupons to remove those applied discount from this order.
+             *
+             * We simply can't call WC_Order::remove_coupon here cause doing so will remove the `coupon` from the parent order.
+             * So there will be no way to distinguish `discount amount` for sub-orders.
+             *
+             * @since DOKAN_LITE_SINCE
+             */
+            if ( version_compare( WC()->version, '3.8.0', '>=' ) ) {
+                $sub_order->recalculate_coupons();
+            } else {
+                $rm = new ReflectionMethod( $sub_order, 'recalculate_coupons' );
+                $rm->setAccessible( true );
+                $rm->invoke( $sub_order );
+            }
+        }
+
+        $discount_total = isset( $admin_coupon_data['discount'] ) ? $admin_coupon_data['discount'] : 0;
+        $coupon_code    = $sub_order->get_id() . '_coupon';
+
+        /**
+         * We'll apply on-time coupon for this order and delete it as this coupon is no longer needed.
+         *
+         * @since DOKAN_LITE_SINCE
+         */
+        dokan_apply_coupon_on_order_and_delete( $coupon_code, $discount_total, $sub_order );
+
+        /**
+         * If order status is pending, make it processing so that we can show it in the report.
+         *
+         * @since DOKAN_LITE_SINCE
+         */
+        add_filter( 'dokan_get_order_status', function( $status ) {
+            return 'pending' === $status ? 'processing' : $status;
+        } );
+
+        $admin_commission = dokan()->commission->get_earning_by_order( $sub_order, 'admin', true );
+        $order_total      = $sub_order->get_total() + $discount_total;
+        $net_amount       = $order_total - $admin_commission;
+        $net_amount       = $net_amount > 0 ? $net_amount : 0;
+
+        return apply_filters( 'dokan_get_adjusted_net_amount', $net_amount );
+    }
+
+
     /**
      * Ensure vendor coupon
      *
diff --git a/includes/Order/functions.php b/includes/Order/functions.php
index 1114267..5dd3926 100644
--- a/includes/Order/functions.php
+++ b/includes/Order/functions.php
@@ -315,12 +315,13 @@ function dokan_sync_insert_order( $order_id ) {
     $order              = dokan()->order->get( $order_id );
     $seller_id          = dokan_get_seller_id_by_order( $order_id );
     $order_total        = $order->get_total();
-    $order_status       = dokan_get_prop( $order, 'status' );
     $admin_commission   = dokan()->commission->get_earning_by_order( $order, 'admin' );
     $net_amount         = $order_total - $admin_commission;
+    $net_amount         = $net_amount > 0 ? $net_amount : 0;
     $net_amount         = apply_filters( 'dokan_order_net_amount', $net_amount, $order );
     $threshold_day      = dokan_get_option( 'withdraw_date_limit', 'dokan_withdraw', 0 );
     $threshold_day      = $threshold_day ? $threshold_day : 0;
+    $order_status       = apply_filters( 'dokan_get_order_status', dokan_get_prop( $order, 'status' ), $order );
 
     dokan_delete_sync_duplicate_order( $order_id, $seller_id );
 
@@ -965,3 +966,209 @@ function dokan_is_order_already_exists( $id ) {
 
     return $order_id ? true : false;
 }
+
+/**
+ * Dokan get admin coupon data from an order
+ *
+ * @since  DOKAN_LITE_SINCE
+ *
+ * @param  int|WC_Order $order
+ *
+ * @return array|null on failure
+ */
+function dokan_get_admin_coupon_data_from_order( $order ) {
+    if ( ! $order instanceof WC_Order ) {
+        $order = wc_get_order( $order );
+    }
+
+    if ( ! $order ) {
+        return;
+    }
+
+    $parent_order = dokan_get_parent_order( $order );
+
+    if ( ! $parent_order ) {
+        $parent_order = $order;
+    }
+
+    $coupon_codes = $parent_order->get_coupon_codes();
+
+    if ( empty( $coupon_codes ) ) {
+        return;
+    }
+
+    $admin_coupons = [];
+
+    foreach ( $coupon_codes as $coupon_code ) {
+        $coupon = new WC_Coupon( $coupon_code );
+
+        if ( ! $coupon instanceof WC_Coupon ) {
+            continue;
+        }
+
+        $author = get_post_field( 'post_author', $coupon->get_id() );
+
+        if ( $author && user_can( $author, 'manage_woocommerce' ) ) {
+            array_push( $admin_coupons, $coupon->get_code() );
+        }
+    }
+
+    $vendor_discount = dokan_get_vendor_coupon_discount_from_order( $order );
+    $admin_discount  = $order->get_discount_total() - $vendor_discount;
+
+    return apply_filters( 'dokan_get_admin_coupon_data_from_order', [
+        'coupons'  => $admin_coupons,
+        'discount' => $admin_discount
+    ] );
+}
+
+/**
+ * Dokan get vendor coupon discount from an order
+ *
+ * @since  DOKAN_LITE_SINCE
+ *
+ * @param  int|WC_Order $order
+ *
+ * @return float|null on failure
+ */
+function dokan_get_vendor_coupon_discount_from_order( $order ) {
+    if ( ! $order instanceof WC_Order ) {
+        $order = wc_get_order( $order );
+    }
+
+    if ( ! $order ) {
+        return;
+    }
+
+    $coupon_codes = $order->get_coupon_codes();
+
+    if ( empty( $coupon_codes ) ) {
+        return;
+    }
+
+    $discount_total = 0;
+
+    foreach ( $coupon_codes as $coupon_code ) {
+        $coupon = new WC_Coupon( $coupon_code );
+
+        if ( ! $coupon instanceof WC_Coupon ) {
+            continue;
+        }
+
+        $author = get_post_field( 'post_author', $coupon->get_id() );
+
+        if ( $author && ! user_can( $author, 'manage_woocommerce' ) ) {
+            $discount_total += $coupon->get_amount();
+        }
+    }
+
+    return apply_filters( 'dokan_get_vendor_coupon_discount_from_order', $discount_total );
+}
+
+/**
+ * Dokan apply coupon on order and delete
+ *
+ * @since  DOKAN_LITE_SINCE
+ *
+ * @param  string $coupon_code
+ * @param  float $amount
+ * @param  int|WC_Order $order
+ *
+ * @return void
+ */
+function dokan_apply_coupon_on_order_and_delete( $coupon_code, $amount = 0, $order ) {
+    $admin     = get_user_by( 'email', get_option( 'admin_email' ) );
+    $coupon_id = wp_insert_post( apply_filters( 'dokan_create_tmp_coupon', [
+        'post_title'  => $coupon_code,
+        'post_type'   => 'shop_coupon',
+        'post_status' => 'publish',
+        'post_author' => ! empty( $admin->ID ) ? $admin->ID : 1,
+    ] ) );
+
+    if ( ! $coupon_id || is_wp_error( $coupon_id ) ) {
+        return;
+    }
+
+    $meta = apply_filters( 'dokan_create_tmp_coupon_meta', [
+        'discount_type'              => 'fixed_cart',
+        'coupon_amount'              => $amount,
+        'individual_use'             => 'no',
+        'product_ids'                => '',
+        'exclude_product_ids'        => '',
+        'usage_limit'                => '',
+        'usage_limit_per_user'       => '',
+        'limit_usage_to_x_items'     => '',
+        'expiry_date'                => '',
+        'free_shipping'              => 'no',
+        'exclude_sale_items'         => 'no',
+        'product_categories'         => [],
+        'exclude_product_categories' => [],
+        'minimum_amount'             => '',
+        'maximum_amount'             => '',
+        'customer_email'             => [],
+        'usage_count'                => '0',
+    ] );
+
+    foreach ( $meta as $key => $value ) {
+        update_post_meta( $coupon_id, $key, $value );
+    }
+
+    $coupon = new WC_Coupon( $coupon_code );
+
+    do_action( 'dokan_pre_apply_coupon_on_order_and_delete', $coupon, $order );
+
+    if ( $order->apply_coupon( $coupon ) ) {
+
+        /**
+         * Delete the coupon once it's fully applied, to prevent error such as 'Error during status transition. Invalid coupon'.
+         *
+         * @since DOKAN_LITE_SINCE
+         */
+        add_action( 'shutdown', function() use ( $coupon ) {
+            wp_delete_post( $coupon->get_id(), true );
+        } );
+    }
+}
+
+/**
+ * Check whether the order is suborder or not
+ *
+ * @since  DOKAN_LITE_SINCE
+ *
+ * @param  int|WC_Order $order
+ *
+ * @return bool
+ */
+function dokan_is_suborder( $order ) {
+    $parent_order = dokan_get_parent_order( $order );
+
+    if ( ! $parent_order ) {
+        return false;
+    }
+
+    return apply_filters( 'dokan_is_suborder', (bool) $parent_order->get_meta( 'has_sub_order' ) );
+}
+
+/**
+ * Dokan get parent order. If no sub orders is found count it as a parent order too.
+ *
+ * @since  DOKAN_LITE_SINCE
+ *
+ * @param  int|WC_Order $order
+ *
+ * @return WC_order|false on failure
+ */
+function dokan_get_parent_order( $order ) {
+    if ( ! $order instanceof WC_Order ) {
+        $order = wc_get_order( $order );
+    }
+
+    if ( ! $order ) {
+        return false;
+    }
+
+    $parent_order_id = $order->get_parent_id();
+    $parent_order    = $parent_order_id ? wc_get_order( $parent_order_id ) : $order;
+
+    return apply_filters( 'dokan_get_parent_order', $parent_order );
+}
diff --git a/includes/functions.php b/includes/functions.php
index a5a4fce..c4705ff 100755
--- a/includes/functions.php
+++ b/includes/functions.php
@@ -3745,6 +3745,17 @@ function dokan_redirect_to_admin_setup_wizard() {
     exit;
 }
 
+/**
+ * Dokan get admin coupon discount bearer
+ *
+ * @since  DOKAN_LITE_SINCE
+ *
+ * @return string
+ */
+function dokan_get_admin_coupon_discount_bearer() {
+    return apply_filters( 'dokan_get_admin_coupon_discount_bearer', dokan_get_option( 'admin_coupon_bearer', 'dokan_selling', 'admin' ) );
+}
+
 /**
  * Dokan generate star ratings
  *
diff --git a/templates/orders/details.php b/templates/orders/details.php
index 1e0e377..338d750 100755
--- a/templates/orders/details.php
+++ b/templates/orders/details.php
@@ -96,11 +96,18 @@ $hide_customer_info = dokan_get_option( 'hide_customer_info', 'dokan_selling', '
                                         <tr>
                                             <th><?php esc_html_e( 'Coupons', 'dokan-lite' ); ?></th>
                                             <td>
-                                                <ul class="list-inline"><?php
+                                                <ul class="dokan-coupon-list"><?php
                                                     foreach ( $coupons as $item_id => $item ) {
 
                                                         $post_id = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE post_title = %s AND post_type = 'shop_coupon' AND post_status = 'publish' LIMIT 1;", $item['name'] ) );
 
+                                                        $author  = get_post_field( 'post_author', $post_id );
+
+                                                        if ( $author && user_can( $author, 'manage_options' ) ) {
+                                                            echo '<li><a data-html="true" class="tips code" title="' . esc_attr( wc_price( $item['discount_amount'] ) ) . '" href="#"><span>' . esc_html( $item['name'] ). '</span></a> (' . sprintf( __( 'This %s coupon is created by admin', 'dokan' ), wc_price( $item['discount_amount'] ) ) . ')</li>';
+                                                            continue;
+                                                        }
+
                                                         $link = dokan_get_coupon_edit_url( $post_id );
 
                                                         echo '<li><a data-html="true" class="tips code" title="' . esc_attr( wc_price( $item['discount_amount'] ) ) . '" href="' . esc_url( $link ) . '"><span>' . esc_html( $item['name'] ). '</span></a></li>';
-- 
2.20.1 (Apple Git-117)

We have switched to Product Vendors (WooCommerce) and extended that plugin. Unfortunately I can't help here.