Created a 'pos_check' gateway.

includes/gateways.php

@@ -53,7 +53,8 @@ public function payment_gateways( array $gateways ) {
 
     return array_merge($gateways, array(
       'WC_POS\Gateways\Cash',
-      'WC_POS\Gateways\Card'
+      'WC_POS\Gateways\Card',
+      'WC_POS\Gateways\Check'
     ));
   }
 
@@ -64,9 +65,9 @@ public function payment_gateways( array $gateways ) {
    */
   public function load_gateways( $gateways ) {
     foreach( $gateways as $gateway ){
-      $gateway->pos = in_array( $gateway->id, array( 'pos_cash', 'pos_card', 'paypal' ) );
+      $gateway->pos = in_array( $gateway->id, array( 'pos_cash', 'pos_card', 'pos_check', 'paypal' ) );
     }
     return $gateways;
   }
 
-}
+}

includes/gateways/check.php

@@ -0,0 +1,133 @@
+<?php
+
+/**
+ * Provides a Check Payment Gateway.
+ *
+ * @class       WC_POS_Gateways_Check
+ * @package     WooCommerce POS
+ * @author      Paul Kilmurray <paul@kilbot.com.au>
+ * @link        http://www.wcpos.com
+ * @extends     WC_Payment_Gateway
+ */
+
+ //Simply copied from card.php and all references to card were changed to check.
+
+namespace WC_POS\Gateways;
+
+use WC_Order;
+use WC_Payment_Gateway;
+use WC_POS\API;
+
+class Check extends WC_Payment_Gateway {
+
+  /**
+   * Constructor for the gateway.
+   */
+  public function __construct() {
+    $this->id           = 'pos_check';
+    $this->title        = __( 'Check', 'woocommerce-pos' );
+    $this->description  = '';
+    $this->icon         = apply_filters( 'woocommerce_pos_check_icon', '' );
+    $this->has_fields   = true;
+
+    // Actions
+    add_action( 'woocommerce_pos_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
+    add_action( 'woocommerce_thankyou_pos_check', array( $this, 'calculate_cashback' ) );
+
+  }
+
+  /**
+   * Display the payment fields in the checkout
+   */
+  public function payment_fields() {
+
+    if ( $this->description ) {
+      echo '<p>' . wp_kses_post( $this->description ) . '</p>';
+    }
+
+    $currency_pos = get_option( 'woocommerce_currency_pos' );
+
+    if( $currency_pos == 'left' || 'left_space') {
+      $left_addon = '<span class="input-group-addon">'. get_woocommerce_currency_symbol( get_woocommerce_currency() ) .'</span>';
+      $right_addon = '';
+    } else {
+      $left_addon = '';
+      $right_addon = '<span class="input-group-addon">'. get_woocommerce_currency_symbol( get_woocommerce_currency() ) .'</span>';
+    }
+
+    echo '
+      <div class="form-row " id="pos-cashback_field">
+        <label for="pos-cashback" class="">'. __('Cashback', 'woocommerce-pos') .'</label>
+        <div class="input-group">
+        '. $left_addon .'
+          <input type="text" class="form-control" name="pos-cashback" id="pos-cashback" placeholder="" maxlength="20" data-value="0" data-numpad="cash" data-label="'. __('Cashback', 'woocommerce-pos') .'">
+        '. $right_addon .'
+        </div>
+      </div>
+    ';
+
+  }
+
+  /**
+   * @param int $order_id
+   * @return array
+   */
+  public function process_payment( $order_id ) {
+
+    // get order object
+    $order = new WC_Order( $order_id );
+
+    // update pos_cash data
+    $data = API::get_raw_data();
+    $cashback = isset( $data['payment_details']['pos-cashback'] ) ? wc_format_decimal( $data['payment_details']['pos-cashback'] ) : 0 ;
+
+    if( $cashback !== 0 ) {
+
+      // add order meta
+      update_post_meta( $order_id, '_pos_check_cashback', $cashback );
+
+      // add cashback as fee line item
+      // TODO: this should be handled by $order->add_fee after WC 2.2
+      $item_id = wc_add_order_item( $order_id, array(
+        'order_item_name' => __('Cashback', 'woocommerce-pos'),
+        'order_item_type' => 'fee'
+      ) );
+
+      if ( $item_id ) {
+        wc_add_order_item_meta( $item_id, '_line_total', $cashback );
+        wc_add_order_item_meta( $item_id, '_line_tax', 0 );
+        wc_add_order_item_meta( $item_id, '_line_subtotal', $cashback );
+        wc_add_order_item_meta( $item_id, '_line_subtotal_tax', 0 );
+        wc_add_order_item_meta( $item_id, '_tax_class', 'zero-rate' );
+      }
+
+      // update the order total to include fee
+      $order_total = get_post_meta( $order_id, '_order_total', true );
+      $order_total += $cashback;
+      update_post_meta( $order_id, '_order_total', $order_total );
+
+    }
+
+    // payment complete
+    $order->payment_complete();
+
+    // success
+    return array(
+      'result' => 'success'
+    );
+  }
+
+  public function calculate_cashback( $order_id ) {
+    $message = '';
+    $cashback = get_post_meta( $order_id, '_pos_check_cashback', true );
+
+    // construct message
+    if( $cashback ) {
+      $message = __('Cashback', 'woocommerce-pos') . ': ';
+      $message .= wc_price($cashback);
+    }
+
+    echo $message;
+  }
+
+}

languages/woocommerce-pos.pot

@@ -444,6 +444,17 @@ msgstr ""
 msgid "Amount Tendered"
 msgstr ""
 
+#: includes/gateways/class-wc-pos-check.php:28
+msgid "Check"
+msgstr ""
+
+#: includes/gateways/class-wc-pos-check.php:60
+#: includes/gateways/class-wc-pos-check.php:63
+#: includes/gateways/class-wc-pos-check.php:92
+#: includes/gateways/class-wc-pos-check.php:126
+msgid "Cashback"
+msgstr ""
+
 #: includes/products/class-wc-pos-visibility.php:23
 msgid "POS & Online"
 msgstr ""
@@ -613,4 +624,4 @@ msgstr ""
 #: includes/views/print/tmpl-receipt.php:225
 msgctxt "abbreviation for includes (tax)"
 msgid "incl."
-msgstr ""
+msgstr ""