refactor(voice-call): split manager

extensions/voice-call/src/manager/events.ts

@@ -0,0 +1,178 @@
+import crypto from "node:crypto";
+
+import type { CallId, CallRecord, CallState, NormalizedEvent } from "../types.js";
+import { TerminalStates } from "../types.js";
+import type { CallManagerContext } from "./context.js";
+import { findCall } from "./lookup.js";
+import { addTranscriptEntry, transitionState } from "./state.js";
+import { persistCallRecord } from "./store.js";
+import {
+  clearMaxDurationTimer,
+  rejectTranscriptWaiter,
+  resolveTranscriptWaiter,
+  startMaxDurationTimer,
+} from "./timers.js";
+import { endCall } from "./outbound.js";
+
+function shouldAcceptInbound(config: CallManagerContext["config"], from: string | undefined): boolean {
+  const { inboundPolicy: policy, allowFrom } = config;
+
+  switch (policy) {
+    case "disabled":
+      console.log("[voice-call] Inbound call rejected: policy is disabled");
+      return false;
+
+    case "open":
+      console.log("[voice-call] Inbound call accepted: policy is open");
+      return true;
+
+    case "allowlist":
+    case "pairing": {
+      const normalized = from?.replace(/\D/g, "") || "";
+      const allowed = (allowFrom || []).some((num) => {
+        const normalizedAllow = num.replace(/\D/g, "");
+        return normalized.endsWith(normalizedAllow) || normalizedAllow.endsWith(normalized);
+      });
+      const status = allowed ? "accepted" : "rejected";
+      console.log(
+        `[voice-call] Inbound call ${status}: ${from} ${allowed ? "is in" : "not in"} allowlist`,
+      );
+      return allowed;
+    }
+
+    default:
+      return false;
+  }
+}
+
+function createInboundCall(params: {
+  ctx: CallManagerContext;
+  providerCallId: string;
+  from: string;
+  to: string;
+}): CallRecord {
+  const callId = crypto.randomUUID();
+
+  const callRecord: CallRecord = {
+    callId,
+    providerCallId: params.providerCallId,
+    provider: params.ctx.provider?.name || "twilio",
+    direction: "inbound",
+    state: "ringing",
+    from: params.from,
+    to: params.to,
+    startedAt: Date.now(),
+    transcript: [],
+    processedEventIds: [],
+    metadata: {
+      initialMessage: params.ctx.config.inboundGreeting || "Hello! How can I help you today?",
+    },
+  };
+
+  params.ctx.activeCalls.set(callId, callRecord);
+  params.ctx.providerCallIdMap.set(params.providerCallId, callId);
+  persistCallRecord(params.ctx.storePath, callRecord);
+
+  console.log(`[voice-call] Created inbound call record: ${callId} from ${params.from}`);
+  return callRecord;
+}
+
+export function processEvent(ctx: CallManagerContext, event: NormalizedEvent): void {
+  if (ctx.processedEventIds.has(event.id)) return;
+  ctx.processedEventIds.add(event.id);
+
+  let call = findCall({
+    activeCalls: ctx.activeCalls,
+    providerCallIdMap: ctx.providerCallIdMap,
+    callIdOrProviderCallId: event.callId,
+  });
+
+  if (!call && event.direction === "inbound" && event.providerCallId) {
+    if (!shouldAcceptInbound(ctx.config, event.from)) {
+      // TODO: Could hang up the call here.
+      return;
+    }
+
+    call = createInboundCall({
+      ctx,
+      providerCallId: event.providerCallId,
+      from: event.from || "unknown",
+      to: event.to || ctx.config.fromNumber || "unknown",
+    });
+
+    // Normalize event to internal ID for downstream consumers.
+    event.callId = call.callId;
+  }
+
+  if (!call) return;
+
+  if (event.providerCallId && !call.providerCallId) {
+    call.providerCallId = event.providerCallId;
+    ctx.providerCallIdMap.set(event.providerCallId, call.callId);
+  }
+
+  call.processedEventIds.push(event.id);
+
+  switch (event.type) {
+    case "call.initiated":
+      transitionState(call, "initiated");
+      break;
+
+    case "call.ringing":
+      transitionState(call, "ringing");
+      break;
+
+    case "call.answered":
+      call.answeredAt = event.timestamp;
+      transitionState(call, "answered");
+      startMaxDurationTimer({
+        ctx,
+        callId: call.callId,
+        onTimeout: async (callId) => {
+          await endCall(ctx, callId);
+        },
+      });
+      break;
+
+    case "call.active":
+      transitionState(call, "active");
+      break;
+
+    case "call.speaking":
+      transitionState(call, "speaking");
+      break;
+
+    case "call.speech":
+      if (event.isFinal) {
+        addTranscriptEntry(call, "user", event.transcript);
+        resolveTranscriptWaiter(ctx, call.callId, event.transcript);
+      }
+      transitionState(call, "listening");
+      break;
+
+    case "call.ended":
+      call.endedAt = event.timestamp;
+      call.endReason = event.reason;
+      transitionState(call, event.reason as CallState);
+      clearMaxDurationTimer(ctx, call.callId);
+      rejectTranscriptWaiter(ctx, call.callId, `Call ended: ${event.reason}`);
+      ctx.activeCalls.delete(call.callId);
+      if (call.providerCallId) ctx.providerCallIdMap.delete(call.providerCallId);
+      break;
+
+    case "call.error":
+      if (!event.retryable) {
+        call.endedAt = event.timestamp;
+        call.endReason = "error";
+        transitionState(call, "error");
+        clearMaxDurationTimer(ctx, call.callId);
+        rejectTranscriptWaiter(ctx, call.callId, `Call error: ${event.error}`);
+        ctx.activeCalls.delete(call.callId);
+        if (call.providerCallId) ctx.providerCallIdMap.delete(call.providerCallId);
+      }
+      break;
+  }
+
+  persistCallRecord(ctx.storePath, call);
+}
+