Deduce emote icon extension from first button to speed up loading

Instead of probing extensions for every emote button (N*M HEAD requests),
probe once using button1_off and reuse the result for all buttons.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 11 insertions, 13 deletions

diff --git a/webAO/packets/handlers/handlePV.ts b/webAO/packets/handlers/handlePV.ts
index 4ac747f..a39a4dd 100644
--- a/webAO/packets/handlers/handlePV.ts
+++ b/webAO/packets/handlers/handlePV.ts
@@ -43,6 +43,16 @@ export const handlePV = async (args: string[]) => {
 					alt="unavailable"
 					class="emote_button">No emotes available</span>`;
   } else {
+    // Probe extensions once using button1_off, then reuse for all emotes
+    const charPath = `${AO_HOST}characters/${encodeURI(me.name.toLowerCase())}/emotions/`;
+    let emoteExtension = client.emotions_extensions[0];
+    for (const extension of client.emotions_extensions) {
+      if (await fileExists(`${charPath}button1_off${extension}`)) {
+        emoteExtension = extension;
+        break;
+      }
+    }
+
     for (let i = 1; i <= ini.emotions.number; i++) {
       try {
         const emoteinfo = ini.emotions[i].split("#");
@@ -56,20 +66,8 @@ export const handlePV = async (args: string[]) => {
           esfx = "0";
           esfxd = 0;
         }
-        // Make sure the asset server is case insensitive, or that everything on it is lowercase
 
-        let url;
-        for (const extension of client.emotions_extensions) {
-          url = `${AO_HOST}characters/${encodeURI(
-            me.name.toLowerCase(),
-          )}/emotions/button${i}_off${extension}`;
-
-          const exists = await fileExists(url);
-
-          if (exists) {
-            break;
-          }
-        }
+        const url = `${charPath}button${i}_off${emoteExtension}`;
 
         emotes[i] = {
           desc: emoteinfo[0].toLowerCase(),