Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

vendor/zendframework/zend-feed/src/Writer/Feed.php

@@ -0,0 +1,239 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Feed\Writer;
+
+use Countable;
+use Iterator;
+
+/**
+*/
+class Feed extends AbstractFeed implements Iterator, Countable
+{
+    /**
+     * Contains all entry objects
+     *
+     * @var array
+     */
+    protected $entries = [];
+
+    /**
+     * A pointer for the iterator to keep track of the entries array
+     *
+     * @var int
+     */
+    protected $entriesKey = 0;
+
+    /**
+     * Creates a new Zend\Feed\Writer\Entry data container for use. This is NOT
+     * added to the current feed automatically, but is necessary to create a
+     * container with some initial values preset based on the current feed data.
+     *
+     * @return \Zend\Feed\Writer\Entry
+     */
+    public function createEntry()
+    {
+        $entry = new Entry;
+        if ($this->getEncoding()) {
+            $entry->setEncoding($this->getEncoding());
+        }
+        $entry->setType($this->getType());
+        return $entry;
+    }
+
+    /**
+     * Appends a Zend\Feed\Writer\Deleted object representing a new entry tombstone
+     * to the feed data container's internal group of entries.
+     *
+     * @param Deleted $deleted
+     * @return void
+     */
+    public function addTombstone(Deleted $deleted)
+    {
+        $this->entries[] = $deleted;
+    }
+
+    /**
+     * Creates a new Zend\Feed\Writer\Deleted data container for use. This is NOT
+     * added to the current feed automatically, but is necessary to create a
+     * container with some initial values preset based on the current feed data.
+     *
+     * @return Deleted
+     */
+    public function createTombstone()
+    {
+        $deleted = new Deleted;
+        if ($this->getEncoding()) {
+            $deleted->setEncoding($this->getEncoding());
+        }
+        $deleted->setType($this->getType());
+        return $deleted;
+    }
+
+    /**
+     * Appends a Zend\Feed\Writer\Entry object representing a new entry/item
+     * the feed data container's internal group of entries.
+     *
+     * @param Entry $entry
+     * @return Feed
+     */
+    public function addEntry(Entry $entry)
+    {
+        $this->entries[] = $entry;
+        return $this;
+    }
+
+    /**
+     * Removes a specific indexed entry from the internal queue. Entries must be
+     * added to a feed container in order to be indexed.
+     *
+     * @param int $index
+     * @throws Exception\InvalidArgumentException
+     * @return Feed
+     */
+    public function removeEntry($index)
+    {
+        if (!isset($this->entries[$index])) {
+            throw new Exception\InvalidArgumentException('Undefined index: ' . $index . '. Entry does not exist.');
+        }
+        unset($this->entries[$index]);
+
+        return $this;
+    }
+
+    /**
+     * Retrieve a specific indexed entry from the internal queue. Entries must be
+     * added to a feed container in order to be indexed.
+     *
+     * @param int $index
+     * @throws Exception\InvalidArgumentException
+     */
+    public function getEntry($index = 0)
+    {
+        if (isset($this->entries[$index])) {
+            return $this->entries[$index];
+        }
+        throw new Exception\InvalidArgumentException('Undefined index: ' . $index . '. Entry does not exist.');
+    }
+
+    /**
+     * Orders all indexed entries by date, thus offering date ordered readable
+     * content where a parser (or Homo Sapien) ignores the generic rule that
+     * XML element order is irrelevant and has no intrinsic meaning.
+     *
+     * Using this method will alter the original indexation.
+     *
+     * @return Feed
+     */
+    public function orderByDate()
+    {
+        /**
+         * Could do with some improvement for performance perhaps
+         */
+        $timestamp = time();
+        $entries = [];
+        foreach ($this->entries as $entry) {
+            if ($entry->getDateModified()) {
+                $timestamp = (int) $entry->getDateModified()->getTimestamp();
+            } elseif ($entry->getDateCreated()) {
+                $timestamp = (int) $entry->getDateCreated()->getTimestamp();
+            }
+            $entries[$timestamp] = $entry;
+        }
+        krsort($entries, SORT_NUMERIC);
+        $this->entries = array_values($entries);
+
+        return $this;
+    }
+
+    /**
+     * Get the number of feed entries.
+     * Required by the Iterator interface.
+     *
+     * @return int
+     */
+    public function count()
+    {
+        return count($this->entries);
+    }
+
+    /**
+     * Return the current entry
+     *
+     * @return Entry
+     */
+    public function current()
+    {
+        return $this->entries[$this->key()];
+    }
+
+    /**
+     * Return the current feed key
+     *
+     * @return mixed
+     */
+    public function key()
+    {
+        return $this->entriesKey;
+    }
+
+    /**
+     * Move the feed pointer forward
+     *
+     * @return void
+     */
+    public function next()
+    {
+        ++$this->entriesKey;
+    }
+
+    /**
+     * Reset the pointer in the feed object
+     *
+     * @return void
+     */
+    public function rewind()
+    {
+        $this->entriesKey = 0;
+    }
+
+    /**
+     * Check to see if the iterator is still valid
+     *
+     * @return bool
+     */
+    public function valid()
+    {
+        return 0 <= $this->entriesKey && $this->entriesKey < $this->count();
+    }
+
+    /**
+     * Attempt to build and return the feed resulting from the data set
+     *
+     * @param  string  $type The feed type "rss" or "atom" to export as
+     * @param  bool    $ignoreExceptions
+     * @throws Exception\InvalidArgumentException
+     * @return string
+     */
+    public function export($type, $ignoreExceptions = false)
+    {
+        $this->setType(strtolower($type));
+        $type = ucfirst($this->getType());
+        if ($type !== 'Rss' && $type !== 'Atom') {
+            throw new Exception\InvalidArgumentException('Invalid feed type specified: ' . $type . '.'
+            . ' Should be one of "rss" or "atom".');
+        }
+        $renderClass = 'Zend\\Feed\\Writer\\Renderer\\Feed\\' . $type;
+        $renderer = new $renderClass($this);
+        if ($ignoreExceptions) {
+            $renderer->ignoreExceptions();
+        }
+        return $renderer->render()->saveXml();
+    }
+}