Refactor out isLinkPreviewable

src/components/views/messages/TextualBody.js

@@ -84,10 +84,27 @@ module.exports = React.createClass({
     findLink: function(nodes) {
         for (var i = 0; i < nodes.length; i++) {
             var node = nodes[i];
-            if (node.tagName === "A" && node.getAttribute("href") &&
+            if (node.tagName === "A" && node.getAttribute("href"))
-                (node.getAttribute("href").startsWith("http://") ||
-                 node.getAttribute("href").startsWith("https://")))
             {
+                return this.isLinkPreviewable(node) ? node : undefined;
+            }
+            else if (node.tagName === "PRE" || node.tagName === "CODE") {
+                return;
+            }
+            else if (node.children && node.children.length) {
+                return this.findLink(node.children)
+            }
+        }
+    },
+
+    isLinkPreviewable: function(node) {
+        // don't try to preview relative links
+        if (!node.getAttribute("href").startsWith("http://") &&
+            !node.getAttribute("href").startsWith("https://"))
+        {
+            return false;
+        }
+
         // as a random heuristic to avoid highlighting things like "foo.pl"
         // we require the linked text to either include a / (either from http://
         // or from a full foo.bar/baz style schemeless URL) - or be a markdown-style
@@ -109,14 +126,6 @@ module.exports = React.createClass({
                 return node;
             }
         }
-            }
-            else if (node.tagName === "PRE" || node.tagName === "CODE") {
-                return;
-            }
-            else if (node.children && node.children.length) {
-                return this.findLink(node.children)
-            }
-        }
     },
 
     onCancelClick: function(event) {