WordpressImporter::importChannel PHP Method

    function importChannel(DOMNode $channel, $commit)
    {
        $channel_name = $channel->getElementsByTagName('title')->item(0)->nodeValue;
        $this->report('Importing channel "' . h($channel_name) . '"');
        $fallbackTZOffset = $this->deduceChannelTimezoneOffset($channel);
        $count_posts = 0;
        $count_pages = 0;
        $count_attachments = 0;
        $timer = microtime(1);
        git::reset();
        # rollback any previously prepared commit
        try {
            foreach ($channel->getElementsByTagName('item') as $item) {
                if ($item->nodeType !== XML_ELEMENT_NODE) {
                    continue;
                }
                $obj = $this->importItem($item, $fallbackTZOffset);
                if (!$obj) {
                    continue;
                }
                if ($obj instanceof GBExposedContent) {
                    $this->postProcessExposedContent($obj);
                    $this->report('Importing ' . ($obj instanceof WPPost ? 'post' : 'page') . ' ' . h($obj->name) . ' "' . h($obj->title) . '" by ' . h($obj->author->name) . ' published ' . $obj->published);
                    if ($this->writeExposedContent($obj)) {
                        if ($obj instanceof WPPost) {
                            $count_posts++;
                        } else {
                            $count_pages++;
                        }
                    }
                } elseif ($obj instanceof WPAttachment) {
                    $this->postProcessAttachment($obj);
                    $this->report('Importing attachment ' . h($obj->name) . ' (' . h($obj->wpurl) . ')');
                    if ($this->writeAttachment($obj)) {
                        $count_attachments++;
                    }
                }
                if ($this->debug) {
                    $this->dump($obj);
                }
            }
            $timer = microtime(1) - $timer;
            $count = $count_posts + $count_pages + $count_attachments;
            $this->importedObjectsCount += $count;
            $message = 'Imported ' . counted($count, 'object', 'objects', 'zero', 'one') . ' (' . counted($count_posts, 'post', 'posts', 'zero', 'one') . ', ' . counted($count_pages, 'page', 'pages', 'zero', 'one') . ' and ' . counted($count_attachments, 'attachment', 'attachments', 'zero', 'one') . ')';
            $this->report($message . ' from channel "' . h($channel_name) . '"' . ' in ' . gb_format_duration($timer));
            if ($commit) {
                $this->report('Creating commit...');
                try {
                    git::commit($message . ' from Wordpress blog ' . $channel_name, GBUser::findAdmin()->gitAuthor());
                    $this->report('Committed to git repository');
                } catch (GitError $e) {
                    if (strpos($e->getMessage(), 'nothing added to commit') !== false) {
                        $this->report('Nothing committed because no changes where done');
                    } else {
                        throw $e;
                    }
                }
            }
        } catch (Exception $e) {
            git::reset();
            # rollback prepared commit
            throw $e;
        }
    }