dashboard: no subscription to this node itself

A page opened from another node's page takes that page's subscriptions
along; one of them can be this node, another there. The page then
followed this node as a subscribed one too, and showed its messages
twice, from its own log and from the subscription (`→ LLL PING` and
`LLL ← RRR PING`, the same message), on the map as in the console.

The page follows no subscription of its own node: not when it knows
which node it is, and one begun before that stops once it does; its
messages, if any came, are left out.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/api/dashboard/dashboard.html b/src/api/dashboard/dashboard.html
index 0be3526..d173418 100644
--- a/src/api/dashboard/dashboard.html
+++ b/src/api/dashboard/dashboard.html
@@ -2810,7 +2810,11 @@ async function obtainTokens() {
   }
 }
 // Follows `id`'s own links, again after a while if it fails (2 s, doubling to a minute).
+// Not this node itself (a subscription handed over from another node's page, where it
+// was another): its links and messages are the page's own already, and read twice
+// they'd show twice.
 function follow(id, delay = 2000) {
+  if (state && id === state.node.id) return;
   const old = subscribed.get(id);
   if (old) old.stop();
   const controller = new AbortController();
@@ -3552,7 +3556,7 @@ function ownMessagesArrived(list, sent) {
 // sent): each message once. Each named by both ends (`from`, `to`) and the node that
 // logged it (`node`), its number and exchange made its own (`node:seq`).
 function remoteMessagesArrived(id, entry, list, sent) {
-  if (!state) return;
+  if (!state || id === state.node.id) return;
   noteStream(id, list, sent);
   const self = state.node.id;
   // Its messages come whole, those since the last event, up to the latest 500: one
@@ -4056,6 +4060,9 @@ function connect() {
     remakesArrived();
     if (treeShown && writerTree === null) loadTree();
     if (token === null && tokenTimer === null) obtainTokens();
+    // Followed before the page knew which node it is: not any more.
+    const own = subscribed.get(state.node.id);
+    if (own) { own.stop(); subscribed.delete(state.node.id); }
     for (const id of subscriptions) if (!subscribed.has(id)) follow(id);
   });
   events.addEventListener("patch", event => {