From 5f5f96a35ea3c675f0494ed376b10ed5e6f1542f Mon Sep 17 00:00:00 2001
From: Knut Ahlers <knut@ahlers.me>
Date: Sun, 20 Feb 2022 13:52:40 +0100
Subject: [PATCH] [overlays] Add helper function to render template strings

Signed-off-by: Knut Ahlers <knut@ahlers.me>
---
 .../apimodules/overlays/default/debug.html    |  2 +-
 .../overlays/default/eventclient.mjs          | 27 +++++++++++++++++--
 2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/internal/apimodules/overlays/default/debug.html b/internal/apimodules/overlays/default/debug.html
index b9cb107..3539f68 100644
--- a/internal/apimodules/overlays/default/debug.html
+++ b/internal/apimodules/overlays/default/debug.html
@@ -71,7 +71,7 @@
       },
 
       mounted() {
-        new EventClient({
+        window.botClient = new EventClient({
           handlers: {
             _: (evt, data, time, live) => {
               this.events = [
diff --git a/internal/apimodules/overlays/default/eventclient.mjs b/internal/apimodules/overlays/default/eventclient.mjs
index b48e5d9..f73ed23 100644
--- a/internal/apimodules/overlays/default/eventclient.mjs
+++ b/internal/apimodules/overlays/default/eventclient.mjs
@@ -36,6 +36,15 @@ export default class EventClient {
     this.connect()
   }
 
+  /**
+   * Returns the API base URL without trailing slash
+   *
+   * @returns {string} API base URL
+   */
+  apiBase() {
+    return window.location.href.substr(0, window.location.href.indexOf('/overlays/'))
+  }
+
   /**
    * Connects the EventClient to the socket
    *
@@ -104,6 +113,21 @@ export default class EventClient {
     return this.params.get(key) || this.options[key] || fallback
   }
 
+  /**
+   * Renders a given template using the bots msgformat API (supports all templating you can use in bot messages)
+   *
+   * @params {string} template The template to render
+   * @returns {Promise} Promise resolving to the rendered output of the template
+   */
+  renderTemplate(template) {
+    return fetch(`${this.apiBase()}/msgformat/format?template=${encodeURIComponent(template)}`, {
+      headers: {
+        authorization: this.paramOptionFallback('token'),
+      },
+    })
+      .then(resp => resp.text())
+  }
+
   /**
    * Modifies the overlay address to the websocket address the bot listens to
    *
@@ -111,7 +135,6 @@ export default class EventClient {
    * @returns {string} Websocket address in form ws://... or wss://...
    */
   socketAddr() {
-    const base = window.location.href.substr(0, window.location.href.indexOf('/overlays/') + '/overlays/'.length)
-    return `${base.replace(/^http/, 'ws')}events.sock`
+    return `${this.apiBase().replace(/^http/, 'ws')}/overlays/events.sock`
   }
 }