use caching for unexpanded CDM

modules/backend-rpc.php

@@ -786,7 +786,15 @@
 
 		// TODO: unify with digest-get-contents?
 		if ($subop == "cdmGetArticle") {
-			$id = db_escape_string($_REQUEST["id"]);
+			$ids = array(db_escape_string($_REQUEST["id"]));
+			$cids = explode(",", $_REQUEST["cids"]);
+
+			$ids = array_merge($ids, $cids);
+
+			$rv = array();
+
+			foreach ($ids as $id) {
+				$id = (int)$id;
 
 				$result = db_query($link, "SELECT content,
 					ttrss_feeds.site_url AS site_url FROM ttrss_user_entries, ttrss_feeds,
@@ -801,12 +809,12 @@
 					$article_content = sanitize_rss($link, $line["content"],
 						false, false, $line['site_url']);
 
-			} else {
+					array_push($rv,
-				$article_content = '';
+						array("id" => $id, "content" => $article_content));
+				}
 			}
 
-			print json_encode(array("article" =>
+			print json_encode($rv);
-				array("id" => $id, "content" => $article_content)));
 
 			return;
 		}

viewfeed.js

@@ -1235,28 +1235,39 @@ function cdmExpandArticle(id) {
 
 				var query = "?op=rpc&subop=cdmGetArticle&id=" + param_escape(id);
 
-				//console.log(query);
+				var neighbor_ids = getRelativePostIds(id);
+
+				/* only request uncached articles */
+				var cids_to_request = [];
+
+				for (var i = 0; i < neighbor_ids.length; i++) {
+					if (cids_requested.indexOf(neighbor_ids[i]) == -1)
+						if ($("CWRAP-" + neighbor_ids[i]).innerHTML == "") {
+							cids_to_request.push(neighbor_ids[i]);
+							cids_requested.push(neighbor_ids[i]);
+						}
+				}
+
+				console.log("additional ids: " + cids_to_request.toString());
+
+				query = query + "&cids=" + cids_to_request.toString();
+
+				console.log(query);
 
 				new Ajax.Request("backend.php", {
 					parameters: query,
 					onComplete: function(transport) {
+
 						$("FUPDPIC-" + id).src = 'images/blank_icon.gif';
 
 						handle_rpc_json(transport);
 
 						var reply = JSON.parse(transport.responseText);
 
-						if (reply) {
+						reply.each(function(article) {
-							var article = reply['article']['content'];
+							$("CWRAP-" + article['id']).innerHTML = article['content']
-							var recv_id = reply['article']['id'];
+							cids_requested.remove(article['id']);
-
+						});
-							if (recv_id == id)
-								$("CWRAP-" + id).innerHTML = article;
-
-						} else {
-							$("CWRAP-" + id).innerHTML = __("Unable to load article.");
-
-						}
 				}});
 
 			}