From 667412e6aef06b18c45315477c15c12606eda463 Mon Sep 17 00:00:00 2001
From: Juliusz Chroboczek <jch@irif.fr>
Date: Wed, 23 Sep 2020 21:01:29 +0200
Subject: [PATCH] Implement /set command.

---
 README         |  3 +++
 static/sfu.css |  5 +++++
 static/sfu.js  | 54 ++++++++++++++++++++++++++++++++++++++++++++++++--
 3 files changed, 60 insertions(+), 2 deletions(-)

diff --git a/README b/README
index 84717fe..9091fcd 100644
--- a/README
+++ b/README
@@ -109,6 +109,9 @@ to all users:
 
  - `/me text`: sends a chat message starting with the sender's username;
  - `/leave`: equivalent to clicking the *Disconnect* button.
+ - `/set var val`: sets the value of a configuration variable without any
+   error checking.  Without parameters, displays the current configuration.
+ - `/unset var`: removes a configuration variable.
  
 The following commands are only available to users with operator
 privileges:
diff --git a/static/sfu.css b/static/sfu.css
index 61cf72a..066af4e 100644
--- a/static/sfu.css
+++ b/static/sfu.css
@@ -297,6 +297,11 @@ textarea.form-reply {
     background: #ececec;
 }
 
+.message-system {
+    font-size: 10px;
+    background: #ececec;
+}
+
 .message-row:after, .message-row:before {
     display: table;
     content: " ";
diff --git a/static/sfu.js b/static/sfu.js
index c3dc35e..767d294 100644
--- a/static/sfu.js
+++ b/static/sfu.js
@@ -126,6 +126,27 @@ function updateSettings(settings) {
     storeSettings(s);
 }
 
+/**
+ * @param {string} key
+ * @param {any} value
+ */
+function updateSetting(key, value) {
+    let s = {};
+    s[key] = value;
+    updateSettings(s);
+}
+
+/**
+ * @param {string} key
+ */
+function delSetting(key) {
+    let s = getSettings();
+    if(!(key in s))
+        return;
+    delete(s[key]);
+    storeSettings(s)
+}
+
 /**
  * @param {string} id
  */
@@ -1209,8 +1230,10 @@ function addToChatbox(peerId, nick, kind, message){
     let container = document.createElement('div');
     container.classList.add('message');
     row.appendChild(container);
-    if (userpass.username === nick) {
-      container.classList.add('message-sender');
+    if(!peerId)
+        container.classList.add('message-system');
+    else if(userpass.username === nick) {
+        container.classList.add('message-sender');
     }
     if(kind !== 'me') {
         let p = formatLines(message.split('\n'));
@@ -1333,6 +1356,33 @@ function handleInput() {
                 }
                 serverConnection.groupAction('clearchat');
                 return;
+            case '/set':
+                if(!rest) {
+                    let settings = getSettings();
+                    let s = "";
+                    for(let key in settings)
+                        s = s + `${key}: ${JSON.stringify(settings[key])}\n`
+                    addToChatbox(null, null, null, s);
+                    return;
+                }
+                let parsed = parseCommand(rest);
+                let value;
+                if(parsed[1]) {
+                    try {
+                        value = JSON.parse(parsed[1])
+                    } catch(e) {
+                        displayError(e);
+                        return;
+                    }
+                } else {
+                    value = true;
+                }
+                updateSetting(parsed[0], value);
+                reflectSettings();
+                return;
+            case '/unset':
+                delSetting(rest.trim());
+                return;
             case '/lock':
             case '/unlock':
                 if(!serverConnection.permissions.op) {