mod_display: provide alternate serialisations (starting with atom)

Zotlabs/Module/Display.php

@@ -12,6 +12,12 @@ class Display extends \Zotlabs\Web\Controller {
 
 	function get($update = 0, $load = false) {
 
+		if(argc() > 1) {
+			$module_format = substr(argv(1),strrpos(argv(1),'.') + 1);
+			if(! in_array($module_format,['atom','zot','json']))
+				$module_format = 'html';			
+		}
+
 		$checkjs = new \Zotlabs\Web\CheckJS(1);
 	
 		if($load)
@@ -22,8 +28,12 @@ class Display extends \Zotlabs\Web\Controller {
 			return;
 		}
 	
-		if(argc() > 1 && argv(1) !== 'load')
+		if(argc() > 1 && argv(1) !== 'load') {
 			$item_hash = argv(1);
+			if($module_format !== 'html') {
+				$item_hash = substr($item_hash,0,strrpos($item_hash,'.'));
+			}
+		}
 	
 		if($_REQUEST['mid'])
 			$item_hash = $_REQUEST['mid'];
@@ -139,10 +149,11 @@ class Display extends \Zotlabs\Web\Controller {
 
 			$static  = ((local_channel()) ? channel_manual_conv_update(local_channel()) : 1);
 
-			//if the target item is not a post (eg a like) we want to address its thread parent
+			// if the target item is not a post (eg a like) we want to address its thread parent
+
 			$mid = ((($target_item['verb'] == ACTIVITY_LIKE) || ($target_item['verb'] == ACTIVITY_DISLIKE)) ? $target_item['thr_parent'] : $target_item['mid']);
 
-			//if we got a decoded hash we must encode it again before handing to javascript 
+			// if we got a decoded hash we must encode it again before handing to javascript 
 			if($decoded)
 				$mid = 'b64.' . base64url_encode($mid);
 
@@ -195,11 +206,11 @@ class Display extends \Zotlabs\Web\Controller {
 
 		$sql_extra = public_permissions_sql($observer_hash);
 
-		if(($update && $load) || ($checkjs->disabled())) {
+		if(($update && $load) || ($checkjs->disabled()) || ($module_format !== 'html')) {
 
 			$pager_sql = sprintf(" LIMIT %d OFFSET %d ", intval(\App::$pager['itemspage']),intval(\App::$pager['start']));
 
-			if($load || ($checkjs->disabled())) {
+			if($load || ($checkjs->disabled()) || ($module_format !== 'html')) {
 				$r = null;
 
 				require_once('include/channel.php');
@@ -311,6 +322,11 @@ class Display extends \Zotlabs\Web\Controller {
 			$items = array();
 		}
 	
+
+		switch($module_format) {
+			
+		case 'html':
+
 			if ($checkjs->disabled()) {
 				$o .= conversation($items, 'display', $update, 'traditional');
 				if ($items[0]['title'])
@@ -320,6 +336,49 @@ class Display extends \Zotlabs\Web\Controller {
 				$o .= conversation($items, 'display', $update, 'client');
 			}
 
+			break;
+
+		case 'atom':
+
+			$atom = replace_macros(get_markup_template('atom_feed.tpl'), array(
+				'$version'      => xmlify(\Zotlabs\Lib\System::get_project_version()),
+				'$red'          => xmlify(\Zotlabs\Lib\System::get_platform_name()),
+				'$feed_id'      => xmlify(\App::$cmd),
+				'$feed_title'   => xmlify(t('Article')),
+				'$feed_updated' => xmlify(datetime_convert('UTC', 'UTC', 'now', ATOM_TIME)),
+				'$author'       => '',
+				'$owner'        => '',
+				'$profile_page' => xmlify(z_root() . '/display/' . $target_item['mid']),
+			));
+				
+			$x = [ 'xml' => $atom, 'channel' => $channel, 'observer_hash' => $observer_hash, 'params' => $params ];
+			call_hooks('atom_feed_top',$x);
+
+			$atom = $x['xml'];
+
+			// a much simpler interface
+			call_hooks('atom_feed', $atom);
+
+
+			if($items) {
+				$type = 'html';
+				foreach($items as $item) {
+					if($item['item_private'])
+						continue;
+					$atom .= atom_entry($item, $type, null, '', true, '', false);
+				}
+			}
+
+			call_hooks('atom_feed_end', $atom);
+
+			$atom .= '</feed>' . "\r\n";
+
+			header('Content-type: application/atom+xml');
+			echo $atom;
+			killme();
+			
+		}
+	
 		if($updateable) {
 			$x = q("UPDATE item SET item_unseen = 0 where item_unseen = 1 AND uid = %d and parent = %d ",
 				intval(local_channel()),

view/tpl/atom_feed.tpl

@@ -15,7 +15,9 @@
   <title>{{$feed_title}}</title>
   <generator uri="http://hubzilla.org" version="{{$version}}">{{$red}}</generator>
   <link rel="license" href="http://creativecommons.org/licenses/by/3.0/" />
+  {{if $profile_page}}
   <link rel="alternate" type="text/html" href="{{$profile_page}}" />
+  {{/if}}
 {{if $author}}
 {{$author}}
 {{/if}}