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* InterioringAI companion routes (prototype).
*
* Purpose of this slice: prove that the web app and WhatsApp share ONE
* conversation, along the real customer journey:
*
* 1. the customer starts on the site and can chat anonymously;
* 2. they sign in with their phone (the existing homeowner phone OTP) at the
* latest when they tap "Continue on WhatsApp";
* 3. POST /projects/:id/claim binds the project to their account and their
* verified number to the project — no link code, the login proved it;
* 4. from then on WhatsApp messages from that number land in this project.
*
* The conversation lives in the CompanionProject Durable Object. These routes
* are a thin shell: resolve the project, call the object, return JSON.
*/
import { desc, eq } from "drizzle-orm";
import { Hono } from "hono";
import type { CompanionProject } from "../../companion/durable-object";
import { isCompanionEnabled } from "../../companion/environment";
import {
buildCompanionDeps,
COMPANION_MEDIA_PREFIX,
} from "../../companion/webhook-bridge";
import {
buildContinueUrl,
createLinkStore,
isInsideServiceWindow,
toWhatsAppNumber,
} from "../../companion/whatsapp";
import { getDb } from "../../db";
import {
companionPhoneLinks,
companionProjects,
} from "../../db/schema/companion";
import { hoUsers } from "../../db/schema/homeowner";
import { notificationDeliveryLog } from "../../db/schema/notifications";
import {
BadRequestError,
ForbiddenError,
NotFoundError,
} from "../../lib/errors";
import { handleError, success } from "../../lib/response";
import {
hoAuthSessionMiddleware,
requireHoAuth,
} from "../../middleware/ho-auth.middleware";
import { pageContentSecurityPolicy, renderCompanionPage } from "./page";
type Env = {
Bindings: CloudflareBindings;
Variables: { hoUser: { id: string; name: string; email: string } | null };
};
const companion = new Hono<Env>();
/**
* Every companion route — chat endpoints included, not just the page — is
* local/dev only. Unauthenticated project creation plus a Claude call per
* message would be an open credit tap anywhere public.
*/
companion.use("*", async (c, next) => {
if (!isCompanionEnabled(c.env)) {
return c.text("Not found", 404);
}
await next();
});
/**
* GET /api/companion/app — the prototype's web surface: the customer's chat on
* the left, sign-in and "Continue on WhatsApp" on the right, plus a developer
* debug panel a customer would never see.
*/
companion.get("/app", (c) => {
// Fresh nonce per response: only this page's own <style> and <script> run.
const nonce = crypto.randomUUID().replaceAll("-", "");
c.header("Content-Security-Policy", pageContentSecurityPolicy(nonce));
c.header("Cache-Control", "no-store");
return c.html(renderCompanionPage(nonce));
});
const MAX_MESSAGE_LENGTH = 4000;
function projectStub(
env: CloudflareBindings,
projectId: string,
): DurableObjectStub<CompanionProject> {
const namespace = env.COMPANION_PROJECT;
if (!namespace) {
throw new BadRequestError(
"COMPANION_PROJECT binding missing — check wrangler.jsonc",
);
}
return namespace.get(namespace.idFromName(projectId));
}
/** POST /api/companion/projects — start a session. Returns the project id. */
companion.post("/projects", async (c) => {
try {
const db = getDb(c.env.DB);
const body = await c.req
.json<{ label?: string }>()
.catch(() => ({}) as { label?: string });
const id = crypto.randomUUID();
await db.insert(companionProjects).values({
id,
label: body.label ?? null,
lastActivityAt: new Date(),
});
return success(c, { projectId: id, label: body.label ?? null }, 201);
} catch (err) {
return handleError(c, err);
}
});
/** GET /api/companion/projects/:id — message count, cursor, linked phones. */
companion.get("/projects/:id", async (c) => {
try {
const projectId = c.req.param("id");
const db = getDb(c.env.DB);
const rows = await db
.select()
.from(companionProjects)
.where(eq(companionProjects.id, projectId))
.limit(1);
if (rows.length === 0) {
throw new NotFoundError("Project not found");
}
const summary = await projectStub(c.env, projectId).summary();
return success(c, { project: rows[0], ...summary });
} catch (err) {
return handleError(c, err);
}
});
/**
* GET /api/companion/projects/:id/messages?since=<seq>
* The web app polls this. `since` is the last seq it has seen.
*/
companion.get("/projects/:id/messages", async (c) => {
try {
const projectId = c.req.param("id");
const since = Number(c.req.query("since") ?? "0");
const messages = await projectStub(c.env, projectId).messagesSince(
Number.isFinite(since) ? since : 0,
);
return success(c, { messages });
} catch (err) {
return handleError(c, err);
}
});
/** POST /api/companion/projects/:id/messages — send from the web surface. */
companion.post("/projects/:id/messages", async (c) => {
try {
const projectId = c.req.param("id");
const body = await c.req
.json<{ text?: string }>()
.catch(() => ({}) as { text?: string });
const text = (body.text ?? "").trim();
if (!text) {
throw new BadRequestError("text is required");
}
if (text.length > MAX_MESSAGE_LENGTH) {
throw new BadRequestError("text is too long");
}
const result = await projectStub(c.env, projectId).handleIncoming({
channel: "web",
role: "user",
text,
});
const db = getDb(c.env.DB);
await db
.update(companionProjects)
.set({ lastActivityAt: new Date() })
.where(eq(companionProjects.id, projectId));
return success(c, result, 201);
} catch (err) {
return handleError(c, err);
}
});
/**
* POST /api/companion/projects/:id/claim
* Body: { remindersConsent?: boolean }
*
* Called once the customer has signed in with their phone. Binds the project
* to their account and their verified number to the project, then returns the
* "Continue on WhatsApp" link. Safe to call again on every page load: it only
* writes a timeline note the first time this account claims the project.
*
* `remindersConsent` is the "send me reminders on WhatsApp" checkbox. Omit it
* to keep whatever was recorded before.
*/
companion.use("/projects/:id/claim", hoAuthSessionMiddleware, requireHoAuth);
companion.post("/projects/:id/claim", async (c) => {
try {
const projectId = c.req.param("id");
const user = c.get("hoUser");
Iif (!user) {
throw new BadRequestError("Sign in first");
}
const body = await c.req
.json<{ remindersConsent?: boolean }>()
.catch(() => ({}) as { remindersConsent?: boolean });
const db = getDb(c.env.DB);
const projects = await db
.select()
.from(companionProjects)
.where(eq(companionProjects.id, projectId))
.limit(1);
const project = projects[0];
if (!project) {
throw new NotFoundError("Project not found");
}
if (project.hoUserId && project.hoUserId !== user.id) {
throw new ForbiddenError("This conversation belongs to another account");
}
const accounts = await db
.select({
phoneNumber: hoUsers.phoneNumber,
phoneNumberVerified: hoUsers.phoneNumberVerified,
})
.from(hoUsers)
.where(eq(hoUsers.id, user.id))
.limit(1);
const account = accounts[0];
const phone =
account?.phoneNumber && account.phoneNumberVerified
? toWhatsAppNumber(account.phoneNumber)
: null;
if (!phone) {
throw new BadRequestError(
"Sign in with your phone number to continue on WhatsApp",
);
}
const firstClaim = project.hoUserId !== user.id;
if (firstClaim) {
await db
.update(companionProjects)
.set({ hoUserId: user.id, lastActivityAt: new Date() })
.where(eq(companionProjects.id, projectId));
}
await createLinkStore(db).upsertPhoneLink(phone, {
projectId,
hoUserId: user.id,
remindersConsent:
typeof body.remindersConsent === "boolean"
? body.remindersConsent
: undefined,
});
const stub = projectStub(c.env, projectId);
await stub.linkPhone(phone);
if (firstClaim) {
await stub.append({
channel: "web",
role: "system",
text: `Signed in as +${phone}. WhatsApp from this number now continues this conversation.`,
});
}
const links = await db
.select()
.from(companionPhoneLinks)
.where(eq(companionPhoneLinks.phone, phone))
.limit(1);
return success(c, {
phone,
whatsappUrl: buildContinueUrl(c.env.WA_TEST_DISPLAY_NUMBER),
remindersConsent: Boolean(links[0]?.remindersConsentAt),
});
} catch (err) {
return handleError(c, err);
}
});
/** GET /api/companion/projects/:id/links — which phones are bound. */
companion.get("/projects/:id/links", async (c) => {
try {
const projectId = c.req.param("id");
const db = getDb(c.env.DB);
const links = await db
.select()
.from(companionPhoneLinks)
.where(eq(companionPhoneLinks.projectId, projectId));
return success(c, { links });
} catch (err) {
return handleError(c, err);
}
});
/**
* GET /api/companion/dev/otp?phone=+91…
*
* LOCAL ONLY, and only when no WhatsApp token is configured. Locally the login
* code is never sent anywhere — `sendWhatsAppOtp` prints it to the worker log
* and writes it to notification_delivery_log — so the test page reads it here
* to let someone finish signing in. Never reachable in dev, preview or prod.
*/
companion.get("/dev/otp", async (c) => {
if (c.env.ENVIRONMENT !== "local" || c.env.WHATSAPP_ACCESS_TOKEN) {
return c.text("Not found", 404);
}
try {
const phone = c.req.query("phone") ?? "";
const db = getDb(c.env.DB);
const rows = await db
.select({ previewText: notificationDeliveryLog.previewText })
.from(notificationDeliveryLog)
.where(eq(notificationDeliveryLog.recipient, phone))
.orderBy(desc(notificationDeliveryLog.id))
.limit(1);
const code = rows[0]?.previewText?.match(/\d{6}/)?.[0] ?? null;
if (!code) {
throw new NotFoundError("No code sent to that number yet");
}
return success(c, { code });
} catch (err) {
return handleError(c, err);
}
});
/**
* GET /api/companion/media/<key> — photos that arrived on WhatsApp, so the web
* page can show them. Only under the companion prefix.
*/
companion.get("/media/*", async (c) => {
const key = c.req.path.replace(/^.*\/media\//, "");
if (!key.startsWith(COMPANION_MEDIA_PREFIX) || key.includes("..")) {
return c.text("Not found", 404);
}
const object = await c.env.R2.get(key);
if (!object) {
return c.text("Not found", 404);
}
return new Response(object.body, {
headers: {
"content-type":
object.httpMetadata?.contentType ?? "application/octet-stream",
"cache-control": "private, max-age=3600",
},
});
});
/**
* POST /api/companion/projects/:id/whatsapp-nudge
* Body: { text, simulateHoursSinceInbound? }
*
* The proactive path — the one checkpoint reminders will use. Two rules:
*
* - Meta's 24-hour window: inside it, free-form text; outside it, 409 and a
* template is required, because that is what Meta would do.
* - Consent: reminders go only to phones that are `active` AND ticked "send me
* reminders on WhatsApp". Replies to the customer's own messages need no
* consent; reminders the customer did not ask for do.
*
* `simulateHoursSinceInbound` pretends the last WhatsApp message was that
* long ago, so the window can be tested without waiting a day.
*/
companion.post("/projects/:id/whatsapp-nudge", async (c) => {
try {
const projectId = c.req.param("id");
const body = await c.req
.json<{ text?: string; simulateHoursSinceInbound?: number }>()
.catch(
() => ({}) as { text?: string; simulateHoursSinceInbound?: number },
);
const text = (body.text ?? "").trim();
if (!text) {
throw new BadRequestError("text is required");
}
const stub = projectStub(c.env, projectId);
const summary = await stub.summary();
const now = Date.now();
const lastInboundAt =
typeof body.simulateHoursSinceInbound === "number"
? now - body.simulateHoursSinceInbound * 60 * 60 * 1000
: summary.lastInboundAt.whatsapp;
if (!isInsideServiceWindow(lastInboundAt, now)) {
return c.json(
{
success: false,
error: {
code: "TEMPLATE_REQUIRED",
message:
"Outside the 24-hour window: a free-form message would be rejected by Meta. Send an approved template instead.",
},
data: { lastInboundAt, simulated: body.simulateHoursSinceInbound },
},
409,
);
}
const db = getDb(c.env.DB);
const links = await db
.select()
.from(companionPhoneLinks)
.where(eq(companionPhoneLinks.projectId, projectId));
const reasonSkipped = (l: (typeof links)[number]) =>
l.status !== "active"
? l.status
: l.remindersConsentAt
? null
: "no_consent";
const recipients = links.filter((l) => reasonSkipped(l) === null);
const deps = buildCompanionDeps(c.env);
for (const link of recipients) {
await deps.send(link.phone, text);
}
// Only record what was actually delivered. A nudge nobody could receive
// goes nowhere, and the timeline must not claim otherwise.
if (recipients.length > 0) {
await stub.append({ channel: "whatsapp", role: "assistant", text });
}
return success(c, {
sent: recipients.map((l) => l.phone),
skipped: links
.filter((l) => reasonSkipped(l) !== null)
.map((l) => ({ phone: l.phone, reason: reasonSkipped(l) })),
});
} catch (err) {
return handleError(c, err);
}
});
export default companion;
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