preparing webrtc connection

app/sdk/src/api.ts

@@ -16,16 +16,25 @@ export interface Session {
   removeStatusListener(ev: (status: string) => void): void;
 }
 
+export interface Link {
+  setStatusListener(ev: (status: string) => void): void;
+  clearStatusListener(): void;
+  setMessageListener(ev: (message: any) => void): void;
+  clearMessageListener(): void;
+
+  getIce(): { urls: string; username: string; credential: string }[];
+  sendMessage(message: any): Promise<void>;
+
+  close(): Promise<void>;
+}
+
 export interface Ring {
-  addCallingListener(ev: (calls: Call[]) => void): void;
+  addRingingListener(ev: (calls: Call[]) => void): void;
-  removeCallingListener(ev: (calls: Call[]) => void): void;
+  removeRingingListener(ev: (calls: Call[]) => void): void;
 
-  addCallListener(ev: (call: Call | null) => void): void;
+  accept(cardId: string, callId: string, contactNode: string): Promise<Link>;
-  removeCallListener(ev: (call: Call | null) => void): void;
+  decline(cardId: string, callId: string, contactNode: string): Promise<void>;
-
+  ignore(cardId: string, callId: string): Promise<void>;
-  accept(callId: string): void;
-  ignore(callId: string): void;
-  decline(callId: string): void;
 }
 
 export interface Settings {
@@ -75,6 +84,8 @@ export interface Contact {
   setBlockedCard(cardId: string, blocked: boolean): Promise<void>;
   getRegistry(handle: string | null, server: string | null): Promise<Profile[]>;
 
+  callCard(cardId: string, ringInterval: number): Promise<Link>;
+
   addCardListener(ev: (cards: Card[]) => void): void;
   removeCardListener(ev: (cards: Card[]) => void): void;
 }

app/sdk/src/contact.ts

@@ -2,6 +2,7 @@ import { EventEmitter } from 'eventemitter3';
 import type { Contact, Focus } from './api';
 import { Logging } from './logging';
 import { FocusModule } from './focus';
+import { LinkModule } from './link';
 import type { Card, Channel, Article, Topic, Asset, Tag, FocusDetail, Profile, Participant } from './types';
 import { type CardEntity, avatar } from './entities';
 import type { ArticleDetail, ChannelSummary, ChannelDetail, CardProfile, CardDetail, CardItem, ChannelItem, ArticleItem } from './items';
@@ -845,6 +846,18 @@ export class ContactModule implements Contact {
     }
   }
 
+  public async callCard(cardId: string): Promise<Link> {
+    const { node, secure, token } = this;
+    const entry = this.cardEntries.get(cardId);
+    if (!entry || entry.item.detail.status !== 'connected') {
+      throw new Error('invalid card for call');
+    }
+    const { profile, detail } = entry.item;
+    const link = new LinkModule(this.log);
+    await link.call(node, secure, token, cardId, profile.node, detail.token);
+    return link;
+  }
+
   public async setBlockedCard(cardId: string, blocked: boolean): Promise<void> {
     const entry = this.cardEntries.get(cardId);
     if (entry) {

app/sdk/src/ring.ts

@@ -1,39 +1,101 @@
 import { EventEmitter } from 'eventemitter3';
-import type { Ring, Logging } from './api';
+import { LinkModule } from './link';
+import type { Ring, Link, Logging } from './api';
 import type { Call } from './types';
 
+const EXPIRES = 6000;
+
 export class RingModule implements Ring {
   private log: Logging;
   private emitter: EventEmitter;
+  private token: string;
+  private node: string;
+  private secure: boolean;
+  private calls: Map<string, { call: Call, expires: number, status: string }>
+  private closed: boolean;
 
   constructor(log: Logging) {
     this.log = log;
     this.emitter = new EventEmitter();
+    this.calls = new Map<string, { call: Call, expires: number }>();
+    this.ringing = [];
+    this.expire = null;
+    this.closed = false;
   }
 
-  public addCallingListener(ev: (calls: Call[]) => void): void {
+  public addRingingListener(ev: (calls: { cardId: string, callId: string }[]) => void): void {
-    this.emitter.on('calling', ev);
+    this.emitter.on('ringing', ev);
   }
 
-  public removeCallingListener(ev: (calls: Call[]) => void): void {
+  public removeRingingListener(ev: (calls: { cardId: string, callId: string }[]) => void): void {
-    this.emitter.off('calling', ev);
+    this.emitter.off('ringing', ev);
   }
 
-  public addCallListener(ev: (call: Call | null) => void): void {
+  public ring(call: Call): void {
-    this.emitter.on('call', ev);
+    const now = (new Date()).getTime();
+    const { cardId, callId } = call;
+    const expires = now + EXPIRES;
+    const id = `${cardId}:${callId}`;
+    const ringing = this.calls.get(id);
+    if (ringing) {
+      ringing.expires = expires;
+    } else {
+      this.calls.set(id, { expires, call, status: 'ringing' });
+    }
+    this.emitRinging();
+    setTimeout(() => { this.emitRinging() }, EXPIRES + 1);
   }
 
-  public removeCallListener(ev: (call: Call | null) => void): void {
+  private emitRinging(): void {
-    this.emitter.off('call', ev);
+    if (!this.closed) {
+      const now = (new Date()).getTime();
+      const ringing = Array.from(this.calls.values());
+      this.emitter.emit('ringing', ringing.filter(item => item.expires > now && item.status === 'ringing').map(item => ({ cardId: item.call.cardId, callId: item.call.callId })));
+    }
   }
 
-  public ring(call: Call): void {}
+  public async accept(cardId: string, callId: string, contactNode: string): Promise<Link> {
-
+    const now = (new Date()).getTime();
-  public accept(callId: string): void {}
+    const id = `${cardId}:${callId}`;
-
+    const entry = this.ringing.get(id);
-  public ignore(callId: string): void {}
+    if (!entry || entry.expires < now || entry.status !== 'ringing') {
-
+      throw new Error('invalid ringing entry');
-  public decline(callId: string): void {}
+    }
-
+    entry.status = 'accepted';
-  public close(): void {}
+    this.emitRinging();
+    const link = new LinkModule(this.log);
+    await link.join(contactNode, entry.call.calleeToken, ice);
+    return link;
+  }
+
+  public async ignore(cardId: stirng, callId: string): Promise<void> {
+    const id = `${cardId}:${callId}`;
+    const entry = this.ringing.get(id);
+    if (!entry || entry.expires < now || entry.status !== 'ringing') {
+      throw new Error('invalid ringing entry');
+    }
+    entry.status = 'ignored';
+    this.emitRinging();
+  }
+
+  public async decline(cardId: string, callId: string, contactNode: string): Promise<void> {
+    const id = `${cardId}:${callId}`;
+    const entry = this.ringing.get(id);
+    if (!entry || entry.expires < now || entry.status !== 'ringing') {
+      throw new Error('invalid ringing entry');
+    }
+    try {
+      await removeContactCall(contactNode, entry.call.calleeToken, entry.call.callId);
+    }
+    catch (err) {
+      console.log(err);
+    }
+    entry.status = 'declined';
+    this.emitRinging();
+  }
+
+  public close(): void {
+    this.closed = true;
+    this.emitter.emit('ringing', []);
+  }
 }

app/sdk/src/session.ts

@@ -68,7 +68,7 @@ export class SessionModule implements Session {
     this.attribute = new AttributeModule(log, this.settings, this.store, guid, token, node, secure);
     this.stream = new StreamModule(log, this.store, this.crypto, this.staging, guid, token, node, secure, channelTypes);
     this.content = new ContentModule(log, this.crypto, this.contact, this.stream);
-    this.ring = new RingModule(log);
+    this.ring = new RingModule(log, token, node, secure);
     this.connection = new Connection(log, token, node, secure);
 
     const onStatus = (ev: string) => {