Project structure refactoring. Added connection to signaling server.

This commit is contained in:
ghost 2025-09-11 14:03:40 +02:00
parent 41affe1aaa
commit dc71f02fc7
9 changed files with 528 additions and 342 deletions

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@ -18,14 +18,24 @@ js-sys = "0.3.61"
# web-sys with features for media devices
web-sys = { version = "0.3.77", features = [
"BinaryType",
"ErrorEvent",
"Navigator",
"MediaDevices",
"MediaDevices",
"MediaStream",
"MediaStreamConstraints",
"MediaStreamTrack",
"MediaTrackSettings",
"MediaTrackConstraints",
"AudioContext"
"AudioContext",
"RtcPeerConnection",
"RtcConfiguration",
"RtcIceServer",
"RtcIceCandidate",
"RtcIceCandidateInit",
"RtcSessionDescription",
"RtcSessionDescriptionInit",
"RtcOfferOptions",
"RtcAnswerOptions"
]}
# Logging and Tracing

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@ -0,0 +1,141 @@
use dioxus::prelude::*;
use web_sys::WebSocket as BrowserWebSocket;
use crate::models::SignalingMessage;
use crate::utils::{MediaManager, MediaState};
#[component]
pub fn CallControls(
connected: Signal<bool>,
audio_enabled: Signal<bool>,
media_manager: Signal<MediaManager>,
web_socket: Signal<Option<BrowserWebSocket>>,
local_peer_id: Signal<String>,
remote_peer_id: Signal<String>,
) -> Element {
let is_connected = move || connected
.try_read()
.map(|c| *c)
.unwrap_or(false);
let is_audio_enabled = move || audio_enabled
.try_read()
.map(|a| *a)
.unwrap_or(true);
let get_local_id = move || local_peer_id
.try_read()
.map(|id| id.clone())
.unwrap_or_default();
let get_remote_id = move || remote_peer_id
.try_read()
.map(|id| id.clone())
.unwrap_or_default();
let has_mic_permission = move || media_manager
.try_read()
.map(|m| m.is_microphone_active())
.unwrap_or(false);
let get_ws = move || web_socket
.try_read()
.ok()
.and_then(|ws_opt| ws_opt.as_ref().cloned());
rsx! {
div { class: "call-controls",
h2 { "Anruf-Steuerung" }
// Mikrofon-Berechtigung Sektion
div { class: "mic-permission-section",
h3 { "Mikrofon-Berechtigung" }
button {
class: "mic-permission-btn primary",
disabled: has_mic_permission(),
onclick: move |_| {
spawn(async move {
if let Ok(mut manager) = media_manager.try_write() {
match manager.request_microphone_access().await {
Ok(_) => log::info!("Mikrofon-Berechtigung erteilt"),
Err(e) => log::error!("Berechtigung verweigert: {}", e),
}
}
});
},
if has_mic_permission() {
"✅ Berechtigung erteilt"
} else {
"🎤 Berechtigung erteilen"
}
}
}
div { class: "control-buttons",
button {
class: "call-btn primary",
disabled: !is_connected() || !has_mic_permission() || get_remote_id().is_empty(),
onclick: move |_| {
let socket = get_ws();
let local_id = get_local_id();
let remote_id = get_remote_id();
spawn(async move {
match MediaManager::create_peer_connection() {
Ok(pc) => {
log::info!("PeerConnection erstellt, sende Offer...");
let offer_msg = SignalingMessage {
from: local_id.clone(),
to: remote_id.clone(),
msg_type: "offer".to_string(),
data: "dummy-sdp-offer".to_string(),
};
if let Some(ws) = socket {
if let Ok(json) = serde_json::to_string(&offer_msg) {
let _ = ws.send_with_str(&json);
log::info!("Offer gesendet an {}", remote_id);
}
}
}
Err(e) => log::error!("PeerConnection-Fehler: {}", e),
}
});
},
"📞 Anruf starten"
}
// Audio-Stummschaltung
button {
class: if is_audio_enabled() { "mute-btn" } else { "mute-btn muted" },
disabled: !is_connected() || !has_mic_permission(),
onclick: move |_| {
if let Ok(mut enabled) = audio_enabled.try_write() {
*enabled = !*enabled;
log::info!("Audio {}", if *enabled { "aktiviert" } else { "stumm" });
}
},
if is_audio_enabled() {
"🔊 Mikrofon an"
} else {
"🔇 Stumm geschaltet"
}
}
// Anruf beenden
button {
class: "end-btn danger",
disabled: !is_connected(),
onclick: move |_| {
if let Ok(mut manager) = media_manager.try_write() {
manager.stop_stream();
log::info!("Anruf beendet");
}
},
"📵 Anruf beenden"
}
}
}
}
}

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@ -0,0 +1,76 @@
use dioxus::prelude::*;
use web_sys::WebSocket as BrowserWebSocket;
#[component]
pub fn ConnectionPanel(
connected: Signal<bool>,
local_peer_id: Signal<String>,
remote_peer_id: Signal<String>,
web_socket: Signal<Option<BrowserWebSocket>>,
) -> Element {
let is_connected = move || connected
.try_read()
.map(|c| *c)
.unwrap_or(false);
let get_local_id = move || local_peer_id
.try_read()
.map(|id| id.clone())
.unwrap_or_default();
let get_remote_id = move || remote_peer_id
.try_read()
.map(|id| id.clone())
.unwrap_or_default();
rsx! {
div { class: "connection-panel",
h2 { "Verbindung" }
div { class: "input-group",
label { r#for: "local-peer-id", "Ihre Peer ID:" }
input {
id: "local-peer-id",
class: "readonly-input",
r#type: "text",
value: "{get_local_id()}",
readonly: true
}
button {
class: "copy-btn",
onclick: move |_| log::info!("Peer-ID kopiert: {}", get_local_id()),
"📋"
}
}
div { class: "input-group",
label { r#for: "remote-peer-id", "Remote Peer-ID:" }
input {
id: "remote-peer-id",
r#type: "text",
placeholder: "ID des anderen Teilnehmers eingeben",
value: "{get_remote_id()}",
oninput: move |event| {
if let Ok(mut remote) = remote_peer_id.try_write() {
*remote = event.value();
}
}
}
}
// **GEÄNDERT:** Button-Status basiert jetzt auf WebSocket-Verbindung
button {
class: "connect-btn",
disabled: is_connected(),
onclick: move |_| {
// Verbindung läuft automatisch
},
if is_connected() {
"✅ Verbunden"
} else {
"🔄 Verbinde..."
}
}
}
}
}

7
src/components/mod.rs Normal file
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@ -0,0 +1,7 @@
mod connection_panel;
mod call_controls;
mod status_display;
pub use connection_panel::ConnectionPanel;
pub use call_controls::CallControls;
pub use status_display::StatusDisplay;

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@ -0,0 +1,131 @@
use dioxus::prelude::*;
use crate::utils::{MediaManager, MediaState};
#[component]
pub fn StatusDisplay(
connected: Signal<bool>,
audio_enabled: Signal<bool>,
local_peer_id: Signal<String>,
remote_peer_id: Signal<String>,
media_manager: Signal<MediaManager>,
) -> Element {
// **VOLLSTÄNDIG DEFENSIVE:** Alle Werte werden im use_effect gesetzt
let mut display_connected = use_signal(|| false);
let mut display_audio = use_signal(|| true);
let mut display_local_id = use_signal(|| String::from("Wird generiert..."));
let mut display_remote_id = use_signal(|| String::new());
let mut display_mic_status = use_signal(|| String::from("Initialisierung..."));
let mut display_mic_class = use_signal(|| String::from("status-value"));
// Sichere Signal-Updates in einem einzigen Effect
use_effect(move || {
// WebSocket-Status
if let Ok(conn) = connected.try_read() {
display_connected.set(*conn);
}
// Audio-Status
if let Ok(audio) = audio_enabled.try_read() {
display_audio.set(*audio);
}
// Local Peer-ID
if let Ok(local_id) = local_peer_id.try_read() {
if !local_id.is_empty() {
display_local_id.set(local_id.clone());
}
}
// Remote Peer-ID
if let Ok(remote_id) = remote_peer_id.try_read() {
display_remote_id.set(remote_id.clone());
}
// Media Manager Status
if let Ok(manager) = media_manager.try_read() {
let (status_text, status_class) = match &manager.state {
MediaState::Granted(_) => ("Erteilt", "status-value connected"),
MediaState::Denied(_) => ("Verweigert", "status-value disconnected"),
MediaState::Requesting => ("Angefragt...", "status-value requesting"),
MediaState::NotSupported => ("Nicht unterstützt", "status-value disconnected"),
MediaState::Uninitialized => ("Nicht initialisiert", "status-value"),
};
display_mic_status.set(status_text.to_string());
display_mic_class.set(status_class.to_string());
}
});
rsx! {
div { class: "status-display",
h2 { "Status" }
// **SICHER:** Nur lokale Signale verwenden
div { class: "status-item",
span { class: "status-label", "Signaling-Verbindung:" }
span {
class: if *display_connected.read() {
"status-value connected"
} else {
"status-value disconnected"
},
if *display_connected.read() {
"Bereit für Anrufe"
} else {
"Verbinde mit Server..."
}
}
}
// WebRTC-Verbindung
div { class: "status-item",
span { class: "status-label", "WebRTC-Verbindung:" }
span { class: "status-value disconnected", "Nicht verbunden" }
}
// Mikrofon-Berechtigung
div { class: "status-item",
span { class: "status-label", "Mikrofon-Berechtigung:" }
span {
class: "{display_mic_class.read()}",
"{display_mic_status.read()}"
}
}
// Audio-Status (nur bei Verbindung)
if *display_connected.read() {
div { class: "status-item",
span { class: "status-label", "Audio im Anruf:" }
span {
class: if *display_audio.read() {
"status-value connected"
} else {
"status-value disconnected"
},
if *display_audio.read() { "Aktiv" } else { "Stumm geschaltet" }
}
}
}
// Peer-IDs
div { class: "status-item",
span { class: "status-label", "Ihre ID:" }
span { class: "status-value peer-id", "{display_local_id.read()}" }
}
// Remote Peer-ID (nur anzeigen wenn nicht leer)
if !display_remote_id.read().is_empty() {
div { class: "status-item",
span { class: "status-label", "Verbunden mit:" }
span { class: "status-value peer-id", "{display_remote_id.read()}" }
}
}
// WebRTC-Support Warnung
if !MediaManager::is_webrtc_supported() {
div { class: "warning-message",
"⚠️ WebRTC wird von diesem Browser nicht unterstützt"
}
}
}
}
}

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@ -1,19 +1,25 @@
#![allow(non_snake_case)]
mod components;
mod models;
mod utils;
use dioxus::{html::{g::media, h3}, prelude::*};
use dioxus::prelude::*;
use wasm_bindgen::JsCast;
use wasm_bindgen::prelude::Closure;
use wasm_bindgen::prelude::{Closure, JsValue};
use web_sys::{BinaryType, MessageEvent, WebSocket as BrowserWebSocket};
use components::{ConnectionPanel, CallControls, StatusDisplay};
use utils::{MediaManager, MediaState};
use models::SignalingMessage;
const FAVICON: Asset = asset!("/assets/favicon.ico");
const MAIN_CSS: Asset = asset!("/assets/main.css");
const HEADER_SVG: Asset = asset!("/assets/header.svg");
fn main() {
// Initialize logging
dioxus_logger::init(dioxus_logger::tracing::Level::INFO).expect("Failed to initialize logger");
console_error_panic_hook::set_once();
dioxus::launch(App);
}
@ -28,368 +34,151 @@ fn App() -> Element {
#[component]
pub fn Content() ->Element {
// State for connection status and audio
let mut connected = use_signal(|| false);
let mut audio_enabled = use_signal(|| true);
// State for Peer IDs
let mut local_peer_id = use_signal(|| generate_peer_id());
let mut remote_peer_id = use_signal(|| String::new());
let mut media_manager = use_signal(|| MediaManager::new());
// Initialize signals
let connected = use_signal(|| false);
let audio_enabled = use_signal(|| true);
let local_peer_id = use_signal(|| generate_peer_id());
let remote_peer_id = use_signal(|| String::new());
let media_manager = use_signal(|| MediaManager::new());
let web_socket= use_signal(|| None::<BrowserWebSocket>);
// On mount: Request microphone access if not already granted
use_effect(move || {
to_owned![media_manager];
spawn(async move {
match media_manager.write().request_microphone_access().await {
Ok(_) => log::info!("Microphone access granted"),
Err(e) => log::error!("Failed to request microphone access: {}", e)
if let Ok(mut manager) = media_manager.try_write() {
match manager.request_microphone_access().await {
Ok(_) => log::info!("Microphone access granted"),
Err(e) => log::error!("Failed to request microphone access: {}", e)
}
}
});
});
// On Mount: Initialize WebSocket connection
use_effect(move || {
to_owned![web_socket, connected, local_peer_id, remote_peer_id];
if web_socket.try_read().map(|w| w.is_none()).unwrap_or(true) {
match BrowserWebSocket::new("ws://localhost:3478/ws") {
Ok(socket) => {
socket.set_binary_type(BinaryType::Arraybuffer);
// Event Handlers
let onerror =
Closure::wrap(Box::new(move |e: web_sys::ErrorEvent| {
log::error!("WebSocket-Fehler: {:?}", e);
}) as Box<dyn FnMut(web_sys::ErrorEvent)>);
// onclose Handler
let onclose = {
to_owned![connected];
Closure::wrap(Box::new(move |_: web_sys::CloseEvent| {
log::warn!("WebSocket-Verbindung geschlossen");
if let Ok(mut conn) = connected.try_write() {
*conn = false;
}
}) as Box<dyn FnMut(web_sys::CloseEvent)>)
};
let onmessage = {
to_owned![local_peer_id, remote_peer_id];
Closure::wrap(Box::new(move |e: MessageEvent| {
if let Some(text) = e.data().as_string() {
log::info!("Websocket-Nachricht empfangen: {}", text);
if let Ok(msg) = serde_json::from_str::<SignalingMessage>(&text) {
match msg.msg_type.as_str() {
"offer" | "answer" | "ice-candidate" => {
log::info!("WebRTC-Nachricht empfangen: {}", msg.msg_type);
// TODO: WebRTC-Handler implementieren
}
"text" => {
log::info!("Text-Nachricht von {}: {}", msg.from, msg.data);
}
_ => {
log::warn!("Unbekannter Nachrichtentyp: {}", msg.msg_type);
}
}
}
}
}) as Box<dyn FnMut(MessageEvent)>)
};
let onopen = {
to_owned![connected];
Closure::wrap(Box::new(move |_: web_sys::Event| {
log::info!("WebSocket connected");
if let Ok(mut conn) = connected.try_write() {
*conn = true;
}
}) as Box<dyn FnMut(web_sys::Event)>)
};
let onclose = {
to_owned![connected];
Closure::wrap(Box::new(move |_: web_sys::CloseEvent| {
log::info!("WebSocket disconnected");
if let Ok(mut conn) = connected.try_write() {
*conn = false;
}
}) as Box<dyn FnMut(web_sys::CloseEvent)>)
};
socket.set_onerror(Some(onerror.as_ref().unchecked_ref()));
socket.set_onmessage(Some(onmessage.as_ref().unchecked_ref()));
socket.set_onopen(Some(onopen.as_ref().unchecked_ref()));
socket.set_onclose(Some(onclose.as_ref().unchecked_ref()));
onerror.forget();
onmessage.forget();
onopen.forget();
onclose.forget();
if let Ok(mut ws) = web_socket.try_write() {
*ws = Some(socket);
}
}
Err(e) =>
log::error!("Failed to create WebSocket: {:?}", e),
}
}
});
rsx! {
div {
class: "app-container",
// Header
header {
h1 { "Voice Chat MVP" }
p { "WebRTC-basierter Sprachchat mit Ende-zu-Ende-Verschlüsselung" }
}
main {
class: "main-content",
// Connection Panel
ConnectionPanel {
connected: connected.clone(),
local_peer_id: local_peer_id.clone(),
remote_peer_id: remote_peer_id.clone()
connected,
local_peer_id,
remote_peer_id,
web_socket
}
// Call Controls
CallControls {
connected: connected.clone(),
audio_enabled: audio_enabled.clone(),
media_manager: media_manager.clone(),
on_start_call: move |_| {
log::info!("Anruf wird gestartet mit Remote Peer: {}", remote_peer_id());
},
on_end_call: move |_| {
log::info!("Anruf wird beendet");
connected.set(false);
media_manager.write().stop_stream();
},
on_toggle_audio: move |_| {
audio_enabled.set(!audio_enabled());
log::info!("Audio Status: {}", if audio_enabled() { "Aktiviert" } else { "Deaktiviert" });
}
connected,
audio_enabled,
media_manager,
web_socket,
local_peer_id,
remote_peer_id
}
// Status Display
StatusDisplay {
connected: connected.clone(),
audio_enabled: audio_enabled.clone(),
local_peer_id: local_peer_id.clone(),
remote_peer_id: remote_peer_id.clone(),
media_manager: media_manager.clone()
}
}
}
}
}
// Komponente für Verbindungseinstellungen
#[component]
fn ConnectionPanel(
connected: Signal<bool>,
local_peer_id: Signal<String>,
remote_peer_id: Signal<String>
) -> Element {
// Websocket signal
let ws = use_signal(|| None::<BrowserWebSocket>);
// One-time initialization of WebSocket connection
use_effect(move || {
to_owned![ws];
if ws.read().is_none() {
// Create new WebSocket connection
if let Ok(socket) = BrowserWebSocket::new("ws://localhost:8080/ws") {
socket.set_binary_type(BinaryType::Arraybuffer);
ws.write().replace(socket.clone());
// Event handler
let onmessage = Closure::wrap(Box::new(move |e: MessageEvent| {
if let Some(text) = e.data().as_string() {
// Hier später SPD/Candidate verarbeiten
log::info!("WS empfangen: {}", text);
}
}) as Box<dyn FnMut(MessageEvent)>);
socket.set_onmessage(Some(onmessage.as_ref().unchecked_ref()));
onmessage.forget(); // Verhindert, dass Closure gelöscht wird
}
}
});
rsx! {
div {
class: "connection-panel",
h2 { "Verbindung" }
div {
class: "input-group",
label { r#for: "local-peer-id", "Ihre Peer ID:" }
input {
id: "local-peer-id",
class: "readonly-input",
r#type: "text",
value: "{local_peer_id()}",
readonly: true
}
button {
class:"copy-btn",
onclick: move |_| {
// Später: Implementierung für Copy-to-Clipboard
log::info!("Peer-ID kopiert: {}", local_peer_id());
},
"📋"
}
}
div {
class: "input-group",
label { r#for: "remote-peer-id", "Remote Peer-ID:" }
input {
id: "remote-peer-id",
r#type: "text",
placeholder: "ID des anderen Teilnehmers eingeben",
value: "{remote_peer_id()}",
oninput: move |event| {
remote_peer_id.set(event.value());
log::info!("Remote Peer-ID eingegeben: {}", event.value());
}
}
}
button {
class: "connect-btn",
disabled: ws.read().is_some(),
onclick: move |_| {
connected.set(true);
},
if ws.read().is_some() {
"✅ Verbunden"
}
else {
"Mit Signaling Server verbinden"
}
}
}
}
}
// Komponente für Anruf-Steuerungen
#[component]
fn CallControls(
connected: Signal<bool>,
audio_enabled: Signal<bool>,
mut media_manager: Signal<MediaManager>,
on_start_call: EventHandler<MouseEvent>,
on_end_call: EventHandler<MouseEvent>,
on_toggle_audio: EventHandler<MouseEvent>
) -> Element {
rsx! {
div {
class: "call-controls",
h2 { "Anruf-Steuerung" }
div {
class: "control-buttons",
// Start Call
button {
class: "call-btn primary",
onclick: on_start_call,
disabled: !connected(),
"📞 Anruf starten"
}
// Toggle Audio
button {
class: if audio_enabled() {
"mute-btn"
}
else {
"mute-btn-muted"
},
onclick: on_toggle_audio,
disabled: !connected(),
if audio_enabled() {
"🎤 Mikrofon"
}
else {
"🔇 Stumm"
}
}
// End Call
button {
class: "end-btn danger",
onclick: on_end_call,
disabled: !connected(),
"📵 Anruf beenden"
}
}
}
}
}
// Komponente für Status-Anzeige
#[component]
fn StatusDisplay(
connected: Signal<bool>,
audio_enabled: Signal<bool>,
local_peer_id: Signal<String>,
remote_peer_id: Signal<String>,
media_manager: Signal<MediaManager>
) -> Element {
rsx! {
div {
class: "status-display",
h2 { "Status" }
div {
class: "status-item",
span {
class: "status-label",
"Mikrofon Berechtigung:"
}
span {
class: match &media_manager.read().state {
MediaState::Granted(_) => "status-value connected",
MediaState::Denied(_) => "status-value disconnected",
MediaState::Requesting => "status-value requesting",
_ => "status-value unknown"
},
match &media_manager.read().state {
MediaState::Granted(_) => "Erteilt",
MediaState::Denied(_) => "Verweigert",
MediaState::Requesting => "Anfrage läuft",
_ => "Nicht verfügbar"
}
}
}
div {
class: "status-item",
span {
class: "status-label",
"Mikrofon:"
}
span {
class:
if audio_enabled() {
"status-value connected"
}
else {
"status-value disconnected"
},
if audio_enabled() {
"Entmuted"
}
else {
"Stumm"
}
}
}
div {
class: "status-item",
span {
class: "status-label",
"Signaling Server:"
}
span {
class:
if connected() {
"status-value connected"
}
else {
"status-value disconnected"
},
if connected() {
"Verbunden"
}
else {
"Getrennt"
}
}
}
div {
class: "status-item",
span {
class: "status-label",
"WebRTC Verbindung:"
}
span {
class: "status-value disconnected",
"Nicht verbunden"
}
}
div {
class:"status-item",
span {
class: "status-label",
"Mikrofon Status:"
}
span {
class: match &media_manager.read().state {
MediaState::Granted(_) => "status-value connected",
MediaState::Denied(_) => "status-value disconnected",
MediaState::Requesting => "status-value requesting",
_ => "status-value"
},
"{media_manager.read().get_status_text()}"
}
}
div {
class: "status-item",
span {
class: "status-label",
"Lokale Peer-ID:"
}
span {
class: "status-value peer-id",
"{local_peer_id()}"
}
}
if !remote_peer_id().is_empty() {
div {
class: "status-item",
span {
class: "status-label",
"Remote Peer-ID:"
}
span {
class: "status-value peer-id",
"{remote_peer_id()}"
}
}
}
if !MediaManager::is_webrtc_supported() {
div {
class: "warning-message",
"⚠️ WebRTC wird von diesem Browser nicht unterstützt"
connected,
audio_enabled,
local_peer_id,
remote_peer_id,
media_manager
}
}
}

3
src/models/mod.rs Normal file
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@ -0,0 +1,3 @@
mod signaling_message;
pub use signaling_message::SignalingMessage;

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@ -0,0 +1,9 @@
use serde::{Deserialize, Serialize};
#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct SignalingMessage {
pub from: String,
pub to: String,
pub msg_type: String,
pub data: String,
}

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@ -1,6 +1,10 @@
use wasm_bindgen::prelude::*;
use wasm_bindgen::JsCast;
use wasm_bindgen_futures::JsFuture;
use web_sys::{MediaDevices, MediaStream, MediaStreamConstraints, Navigator, Window};
use web_sys::{
MediaStream, MediaStreamConstraints, Navigator, Window,
RtcIceCandidate, RtcPeerConnection, RtcConfiguration, RtcIceServer
};
// Enum für verschiedene Media-Zustände
#[derive(Debug, Clone, PartialEq)]
@ -24,6 +28,22 @@ impl MediaManager {
state: MediaState::Uninitialized,
}
}
pub fn create_peer_connection() -> Result<RtcPeerConnection, String> {
// STUN-Server configuration
let ice_server = RtcIceServer::new();
let urls = js_sys::Array::new();
urls.push(&JsValue::from_str("stun:stun.l.google.com:19302"));
ice_server.set_urls(&urls.into());
let config = RtcConfiguration::new();
let ice_servers = js_sys::Array::new();
ice_servers.push(&ice_server.into());
config.set_ice_servers(&ice_servers.into());
RtcPeerConnection::new_with_configuration(&config)
.map_err(|e| format!("Failed to create peer connection: {:?}", e))
}
// Checks if WebRTC is supported
pub fn is_webrtc_supported() -> bool {
@ -51,9 +71,9 @@ impl MediaManager {
let media_devices = navigator.media_devices().map_err(|_| "MediaDevices API nicht verfügbar")?;
// Define media constraints: only audio, no video
let mut constraints = MediaStreamConstraints::new();
constraints.audio(&JsValue::from(true));
constraints.video(&JsValue::from(false));
let constraints = MediaStreamConstraints::new();
constraints.set_audio(&JsValue::from(true));
constraints.set_video(&JsValue::from(false));
// Request access to the microphone
let promise = media_devices