+/**
+ * Conversation tree
+ *
+ * The widget class for displaying a hierarchical list of notices.
+ *
+ * @category Widget
+ * @package Laconica
+ * @author Evan Prodromou <evan@controlyourself.ca>
+ * @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
+ * @link http://laconi.ca/
+ */
+
+class ConversationTree extends NoticeList
+{
+ var $tree = null;
+ var $table = null;
+
+ /**
+ * Show the tree of notices
+ *
+ * @return void
+ */
+
+ function show()
+ {
+ $cnt = 0;
+
+ $this->tree = array();
+ $this->table = array();
+
+ while ($this->notice->fetch()) {
+
+ $cnt++;
+
+ $id = $this->notice->id;
+ $notice = clone($this->notice);
+
+ $this->table[$id] = $notice;
+
+ if (is_null($notice->reply_to)) {
+ $this->tree['root'] = array($notice->id);
+ } else if (array_key_exists($notice->reply_to, $this->tree)) {
+ $this->tree[$notice->reply_to][] = $notice->id;
+ } else {
+ $this->tree[$notice->reply_to] = array($notice->id);
+ }
+ }
+
+ $this->out->elementStart('div', array('id' =>'notices_primary'));
+ $this->out->element('h2', null, _('Notices'));
+ $this->out->elementStart('ul', array('class' => 'notices'));
+
+ if (array_key_exists('root', $this->tree)) {
+ $rootid = $this->tree['root'][0];
+ $this->showNoticePlus($rootid);
+ }
+
+ $this->out->elementEnd('ul');
+ $this->out->elementEnd('div');
+
+ return $cnt;
+ }
+
+ /**
+ * Shows a notice plus its list of children.
+ *
+ * @param integer $id ID of the notice to show
+ *
+ * @return void
+ */
+
+ function showNoticePlus($id)
+ {
+ $notice = $this->table[$id];
+
+ // We take responsibility for doing the li
+
+ $this->out->elementStart('li', array('class' => 'hentry notice',
+ 'id' => 'notice-' . $this->notice->id));
+
+ $item = $this->newListItem($notice);
+ $item->show();
+
+ if (array_key_exists($id, $this->tree)) {
+ $children = $this->tree[$id];
+
+ $this->out->elementStart('ul', array('class' => 'notices'));
+
+ foreach ($children as $child) {
+ $this->showNoticePlus($child);
+ }
+
+ $this->out->elementEnd('ul');
+ }
+
+ $this->out->elementEnd('li');
+ }
+
+ /**
+ * Override parent class to return our preferred item.
+ *
+ * @param Notice $notice Notice to display
+ *
+ * @return NoticeListItem a list item to show
+ */
+
+ function newListItem($notice)
+ {
+ return new ConversationTreeItem($notice, $this->out);
+ }
+}
+
+/**
+ * Conversation tree list item
+ *
+ * Special class of NoticeListItem for use inside conversation trees.
+ *
+ * @category Widget
+ * @package Laconica
+ * @author Evan Prodromou <evan@controlyourself.ca>
+ * @license http://www.fsf.org/licensing/licenses/agpl.html AGPLv3
+ * @link http://laconi.ca/
+ */
+
+class ConversationTreeItem extends NoticeListItem
+{
+ /**
+ * start a single notice.
+ *
+ * The default creates the <li>; we skip, since the ConversationTree
+ * takes care of that.
+ *
+ * @return void
+ */
+
+ function showStart()
+ {
+ return;
+ }
+
+ /**
+ * finish the notice
+ *
+ * The default closes the <li>; we skip, since the ConversationTree
+ * takes care of that.
+ *
+ * @return void
+ */
+
+ function showEnd()
+ {
+ return;
+ }
+
+ /**
+ * show link to notice conversation page
+ *
+ * Since we're only used on the conversation page, we skip this
+ *
+ * @return void
+ */
+
+ function showContext()
+ {
+ return;
+ }
+}
\ No newline at end of file