Extract constants and add config loader + example appsettings for niom-webrtc; use STUN constant in media manager

appsettings.example.json

@@ -0,0 +1,5 @@
+{
+  "server": {
+    "stun_server": "stun:stun.l.google.com:19302"
+  }
+}

src/config.rs

@@ -0,0 +1,24 @@
+use serde::Deserialize;
+use std::path::Path;
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct ServerOptions {
+    pub stun_server: String,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+pub struct Config {
+    pub server: ServerOptions,
+}
+
+impl Config {
+    pub fn from_file<P: AsRef<Path>>(p: P) -> Result<Self, Box<dyn std::error::Error>> {
+        let s = std::fs::read_to_string(p)?;
+        let cfg: Config = serde_json::from_str(&s)?;
+        Ok(cfg)
+    }
+
+    pub fn load_default() -> Result<Self, Box<dyn std::error::Error>> {
+        Self::from_file("appsettings.json")
+    }
+}

src/constants.rs

@@ -0,0 +1,4 @@
+// Central constants for niom-webrtc
+pub const DEFAULT_STUN_SERVER: &str = "stun:stun.l.google.com:19302";
+pub const ASSET_FAVICON: &str = "/assets/favicon.ico";
+pub const ASSET_MAIN_CSS: &str = "/assets/main.css";

src/main.rs

@@ -3,6 +3,8 @@
 mod components;
 mod models;
 mod utils;
+mod constants;
+mod config;
 
 use dioxus::prelude::*;
 use log::Level;
@@ -30,10 +32,10 @@ fn App() -> Element {
 
 #[component]
 pub fn Content() -> Element {
-    let mut peer_id = use_signal(|| "peer-loading...".to_string());
-    let mut remote_id = use_signal(|| String::new());
-    let mut connected = use_signal(|| false);
-    let mut websocket = use_signal(|| None::<BrowserWebSocket>);
+    let peer_id = use_signal(|| "peer-loading...".to_string());
+    let remote_id = use_signal(|| String::new());
+    let connected = use_signal(|| false);
+    let websocket = use_signal(|| None::<BrowserWebSocket>);
     let initiator_connection = use_signal(|| None::<RtcPeerConnection>);
     let responder_connection = use_signal(|| None::<RtcPeerConnection>);
     // globaler Signal für den lokal freigegebenen MediaStream (Mikrofon)

src/utils/media_manager.rs

@@ -25,7 +25,8 @@ impl MediaManager {
     pub fn create_peer_connection() -> Result<RtcPeerConnection, String> {
     let ice_server = RtcIceServer::new();
     let urls = js_sys::Array::new();
-        urls.push(&JsValue::from_str("stun:stun.l.google.com:19302"));
+    // Use centralized default STUN server constant
+    urls.push(&JsValue::from_str(crate::constants::DEFAULT_STUN_SERVER));
         ice_server.set_urls(&urls.into());
         let config = RtcConfiguration::new();
         let servers = js_sys::Array::new();
@@ -51,7 +52,7 @@ impl MediaManager {
             .ok_or_else(|| "SDP field was not a string".to_string())?;
 
         // 3. Init-Objekt bauen und SDP setzen
-        let mut init = RtcSessionDescriptionInit::new(RtcSdpType::Offer);
+    let init = RtcSessionDescriptionInit::new(RtcSdpType::Offer);
         init.set_sdp(&sdp);
 
         // 4. Local Description setzen
@@ -112,7 +113,7 @@ impl MediaManager {
             }
         }
         
-        let mut init = RtcSessionDescriptionInit::new(RtcSdpType::Answer);
+    let init = RtcSessionDescriptionInit::new(RtcSdpType::Answer);
         init.set_sdp(answer_sdp);
         
         JsFuture::from(pc.set_remote_description(&init))