Added support for refunding invoices and line items

Tests/Recurly/Invoice_Test.php

@@ -150,6 +150,42 @@ public function testRefundAmount() {
     $this->assertEquals($refund_invoice->subtotal_in_cents, -1000);
   }
 
+  public function testRefundPercentage() {
+    $this->client->addResponse('POST', 'https://api.recurly.com/v2/invoices/1001/refund', 'invoices/refund-201.xml');
+    $invoice = Recurly_Invoice::get('1001', $this->client);
+
+    $refund_invoice = $invoice->refundPercentage(10);
+    $this->assertEquals($refund_invoice->subtotal_in_cents, -1000);
+  }
+
+  public function testLineItemRefundWithPercentage() {
+    $this->client->addResponse('POST', 'https://api.recurly.com/v2/invoices/1001/refund', 'invoices/refund-201.xml');
+    $invoice = Recurly_Invoice::get('1001', $this->client);
+    $line_items = $invoice->line_items;
+
+    $adjustment_map = function($line_item) {
+      return $line_item->toRefundAttributesWithPercentage(20);
+    };
+    $adjustments = array_map($adjustment_map, $line_items);
+
+    $refund_invoice = $invoice->refund($adjustments);
+    $this->assertEquals($refund_invoice->subtotal_in_cents, -1000);
+  }
+
+  public function testLineItemRefundWithAmountInCents() {
+    $this->client->addResponse('POST', 'https://api.recurly.com/v2/invoices/1001/refund', 'invoices/refund-201.xml');
+    $invoice = Recurly_Invoice::get('1001', $this->client);
+    $line_items = $invoice->line_items;
+
+    $adjustment_map = function($line_item) {
+      return $line_item->toRefundAttributesWithAmountInCents(100);
+    };
+    $adjustments = array_map($adjustment_map, $line_items);
+
+    $refund_invoice = $invoice->refund($adjustments);
+    $this->assertEquals($refund_invoice->subtotal_in_cents, -1000);
+  }
+
   public function testRefund() {
     $this->client->addResponse('POST', 'https://api.recurly.com/v2/invoices/1001/refund', 'invoices/refund-201.xml');
     $invoice = Recurly_Invoice::get('1001', $this->client);

lib/recurly/adjustment.php

@@ -79,20 +79,29 @@ public function delete() {
    * @throws Recurly_Error if the adjustment cannot be refunded.
    */
   public function refund($quantity = null, $prorate = false, $refund_apply_order = 'credit_first') {
-    if ($this->state == 'pending') {
-      throw new Recurly_Error("Only invoiced adjustments can be refunded");
-    }
+    $this->checkRefundable();
     $invoice = $this->invoice->get();
     return $invoice->refund($this->toRefundAttributes($quantity, $prorate), $refund_apply_order);
   }
 
   public function refundWithDecimal($quantity_decimal = null, $prorate = false, $refund_apply_order = 'credit_first') {
-    if ($this->state == 'pending') {
-      throw new Recurly_Error("Only invoiced adjustments can be refunded");
-    }
+    $this->checkRefundable();
     $invoice = $this->invoice->get();
     return $invoice->refund($this->toRefundAttributesWithDecimal($quantity_decimal, $prorate), $refund_apply_order);
   }
+
+  public function refundWithPercentage($percentage, $prorate = false, $refund_apply_order = 'credit_first') {
+    $this->checkRefundable();
+    $invoice = $this->invoice->get();
+    return $invoice->refund($this->toRefundAttributesWithPercentage($percentage, $prorate), $refund_apply_order);
+  }
+
+  public function refundWithAmountInCents($amount_in_cents, $prorate = false, $refund_apply_order = 'credit_first') {
+    $this->checkRefundable();
+    $invoice = $this->invoice->get();
+    return $invoice->refund($this->toRefundAttributesWithAmountInCents($amount_in_cents, $prorate), $refund_apply_order);
+  }
+
   /**
    * Converts this adjustment into the attributes needed for a refund.
    *
@@ -113,6 +122,14 @@ public function toRefundAttributesWithDecimal($quantity_decimal = null, $prorate
     return array('uuid' => $this->uuid, 'quantity_decimal' => $quantity_decimal, 'prorate' => $prorate);
   }
 
+  public function toRefundAttributesWithPercentage($percentage, $prorate = false) {
+    return array('uuid' => $this->uuid, 'percentage' => $percentage, 'prorate' => $prorate);
+  }
+
+  public function toRefundAttributesWithAmountInCents($amount_in_cents, $prorate = false) {
+    return array('uuid' => $this->uuid, 'amount_in_cents' => $amount_in_cents, 'prorate' => $prorate);
+  }
+
   protected function createUriForAccount() {
     return self::_safeUri(Recurly_Client::PATH_ACCOUNTS, $this->account_code, Recurly_Client::PATH_ADJUSTMENTS);
   }
@@ -126,6 +143,12 @@ public function populateXmlDoc(&$doc, &$node, &$obj, $nested = false) {
     }
   }
 
+  private function checkRefundable() {
+    if ($this->state == 'pending') {
+        throw new Recurly_Error("Only invoiced adjustments can be refunded");
+    }
+  }
+
   protected function getNodeName() {
     return 'adjustment';
   }

lib/recurly/invoice.php

@@ -195,6 +195,23 @@ public function refundAmount($amount_in_cents, $refund_method = 'credit_first')
     return $this->createRefundInvoice(XmlTools::renderXML($doc));
   }
 
+  /**
+   * Refunds a percentage from the invoice and returns a refund invoice
+   * @param int $percentage percentage to refund from this invoice
+   * @param string $refund_method indicates the refund order to apply, valid options: {'credit_first','transaction_first','all_transaction','all_credit'}, defaults to 'credit_first'
+   * @return object Recurly_Invoice a new refund invoice
+   * @throws Recurly_Error
+   */
+  public function refundPercentage($percentage, $refund_method = 'credit_first') {
+    $doc = XmlTools::createDocument();
+
+    $root = $doc->appendChild($doc->createElement($this->getNodeName()));
+    $root->appendChild($doc->createElement('refund_method', $refund_method));
+    $root->appendChild($doc->createElement('percentage', $percentage));
+
+    return $this->createRefundInvoice(XmlTools::renderXML($doc));
+  }
+
   /**
    *
    * Refunds given line items from an invoice and returns new refund invoice
@@ -216,8 +233,10 @@ public function refund($line_items, $refund_method = 'credit_first') {
     foreach ($line_items as $line_item) {
       $adjustment_node = $line_items_node->appendChild($doc->createElement('adjustment'));
       $adjustment_node->appendChild($doc->createElement('uuid', $line_item['uuid']));
-      $adjustment_node->appendChild($doc->createElement('quantity', $line_item['quantity']));
       $adjustment_node->appendChild($doc->createElement('prorate', $line_item['prorate'] ? 'true' : 'false'));
+      if (isset($line_item['quantity'])) { $adjustment_node->appendChild($doc->createElement('quantity', $line_item['quantity'])); }
+      if (isset($line_item['percentage'])) { $adjustment_node->appendChild($doc->createElement('percentage', $line_item['percentage'])); }
+      if (isset($line_item['amount_in_cents'])) { $adjustment_node->appendChild($doc->createElement('amount_in_cents', $line_item['amount_in_cents'])); }
     }
 
     return $this->createRefundInvoice(XmlTools::renderXML($doc));