feat(db): add webhook schema, migration, and repository (#391)

* feat(db): add webhook schema, migration, and repository

Add the database foundation for workspace webhooks:

- Add workspace_webhooks table with migration (webhook_event enum,
  URL, secret, event subscriptions, active flag)
- Add webhook repository with CRUD operations
- Add webhooks schema definition with relations
- Extend card and list repos to return board/list names for
  webhook payload context

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(db): remove unused webhook_event enum and fix migration timestamp

- Remove dead webhook_event pgEnum from schema (events column uses text)
- Remove CREATE TYPE statement from migration SQL
- Fix migration journal timestamp to be chronologically after the
  notifications migration (idx 25)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat(db): return boardPublicId from card and list repo queries

Add board publicId to getWorkspaceAndCardIdByCardPublicId and
getWorkspaceAndListIdByListPublicId return values, needed for
correct boardId in webhook payloads.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(db): add workspaceId index and document secret exposure

- Add index on workspaceId for efficient webhook lookups per workspace
- Add JSDoc comment on getActiveByWorkspaceId explaining that it
  returns secrets for server-side HMAC signing only and must never
  be exposed via client-facing endpoints

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor(db): extract parseEvents helper in webhook repo

DRY up 6 repeated JSON.parse-and-cast calls into a single helper
function, addressing reviewer feedback on PR #391.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/db/src/repository/card.repo.ts

@@ -945,12 +945,14 @@ export const getWorkspaceAndCardIdByCardPublicId = async (
     where: and(eq(cards.publicId, cardPublicId), isNull(cards.deletedAt)),
     with: {
       list: {
-        columns: {},
+        columns: { name: true },
         with: {
           board: {
             columns: {
+              publicId: true,
               workspaceId: true,
               visibility: true,
+              name: true,
             },
           },
         },
@@ -964,6 +966,9 @@ export const getWorkspaceAndCardIdByCardPublicId = async (
         createdBy: result.createdBy,
         workspaceId: result.list.board.workspaceId,
         workspaceVisibility: result.list.board.visibility,
+        listName: result.list.name,
+        boardPublicId: result.list.board.publicId,
+        boardName: result.list.board.name,
       }
     : null;
 };

packages/db/src/repository/list.repo.ts

@@ -419,12 +419,14 @@ export const getWorkspaceAndListIdByListPublicId = async (
   listPublicId: string,
 ) => {
   const result = await db.query.lists.findFirst({
-    columns: { id: true, createdBy: true },
+    columns: { id: true, name: true, createdBy: true },
     where: and(eq(lists.publicId, listPublicId), isNull(lists.deletedAt)),
     with: {
       board: {
         columns: {
+          publicId: true,
           workspaceId: true,
+          name: true,
         },
       },
     },
@@ -433,8 +435,11 @@ export const getWorkspaceAndListIdByListPublicId = async (
   return result
     ? {
         id: result.id,
+        name: result.name,
         createdBy: result.createdBy,
         workspaceId: result.board.workspaceId,
+        boardPublicId: result.board.publicId,
+        boardName: result.board.name,
       }
     : null;
 };

packages/db/src/repository/webhook.repo.ts

@@ -0,0 +1,175 @@
+import { and, eq } from "drizzle-orm";
+
+import type { dbClient } from "@kan/db/client";
+import { workspaceWebhooks } from "@kan/db/schema";
+import { generateUID } from "@kan/shared/utils";
+
+import type { WebhookEvent } from "../schema/webhooks";
+
+/** Parse JSON-encoded events column into typed array */
+function parseEvents(raw: string): WebhookEvent[] {
+  return JSON.parse(raw) as WebhookEvent[];
+}
+
+export const create = async (
+  db: dbClient,
+  webhookInput: {
+    workspaceId: number;
+    name: string;
+    url: string;
+    secret?: string;
+    events: WebhookEvent[];
+    createdBy: string;
+  },
+) => {
+  const [webhook] = await db
+    .insert(workspaceWebhooks)
+    .values({
+      publicId: generateUID(),
+      workspaceId: webhookInput.workspaceId,
+      name: webhookInput.name,
+      url: webhookInput.url,
+      secret: webhookInput.secret,
+      events: JSON.stringify(webhookInput.events),
+      createdBy: webhookInput.createdBy,
+    })
+    .returning({
+      publicId: workspaceWebhooks.publicId,
+      name: workspaceWebhooks.name,
+      url: workspaceWebhooks.url,
+      events: workspaceWebhooks.events,
+      active: workspaceWebhooks.active,
+      createdAt: workspaceWebhooks.createdAt,
+    });
+
+  return webhook
+    ? {
+        ...webhook,
+        events: parseEvents(webhook.events),
+      }
+    : null;
+};
+
+export const update = async (
+  db: dbClient,
+  webhookPublicId: string,
+  webhookInput: {
+    name?: string;
+    url?: string;
+    secret?: string;
+    events?: WebhookEvent[];
+    active?: boolean;
+  },
+) => {
+  const [result] = await db
+    .update(workspaceWebhooks)
+    .set({
+      name: webhookInput.name,
+      url: webhookInput.url,
+      secret: webhookInput.secret,
+      events: webhookInput.events
+        ? JSON.stringify(webhookInput.events)
+        : undefined,
+      active: webhookInput.active,
+      updatedAt: new Date(),
+    })
+    .where(eq(workspaceWebhooks.publicId, webhookPublicId))
+    .returning({
+      publicId: workspaceWebhooks.publicId,
+      name: workspaceWebhooks.name,
+      url: workspaceWebhooks.url,
+      events: workspaceWebhooks.events,
+      active: workspaceWebhooks.active,
+      createdAt: workspaceWebhooks.createdAt,
+      updatedAt: workspaceWebhooks.updatedAt,
+    });
+
+  return result
+    ? {
+        ...result,
+        events: parseEvents(result.events),
+      }
+    : null;
+};
+
+export const getByPublicId = async (db: dbClient, webhookPublicId: string) => {
+  const result = await db.query.workspaceWebhooks.findFirst({
+    columns: {
+      id: true,
+      publicId: true,
+      workspaceId: true,
+      name: true,
+      url: true,
+      secret: true,
+      events: true,
+      active: true,
+      createdAt: true,
+      updatedAt: true,
+    },
+    where: eq(workspaceWebhooks.publicId, webhookPublicId),
+  });
+
+  return result
+    ? {
+        ...result,
+        events: parseEvents(result.events),
+      }
+    : null;
+};
+
+export const getAllByWorkspaceId = async (
+  db: dbClient,
+  workspaceId: number,
+) => {
+  const results = await db.query.workspaceWebhooks.findMany({
+    columns: {
+      publicId: true,
+      name: true,
+      url: true,
+      events: true,
+      active: true,
+      createdAt: true,
+      updatedAt: true,
+    },
+    where: eq(workspaceWebhooks.workspaceId, workspaceId),
+  });
+
+  return results.map((webhook) => ({
+    ...webhook,
+    events: parseEvents(webhook.events),
+  }));
+};
+
+/**
+ * Returns active webhooks with secrets for server-side delivery (HMAC signing).
+ * DO NOT expose this via tRPC or any client-facing endpoint.
+ * Use getAllByWorkspaceId (which omits secrets) for the admin list endpoint.
+ */
+export const getActiveByWorkspaceId = async (
+  db: dbClient,
+  workspaceId: number,
+) => {
+  const results = await db.query.workspaceWebhooks.findMany({
+    columns: {
+      publicId: true,
+      url: true,
+      secret: true,
+      events: true,
+    },
+    where: and(
+      eq(workspaceWebhooks.workspaceId, workspaceId),
+      eq(workspaceWebhooks.active, true),
+    ),
+  });
+
+  return results.map((webhook) => ({
+    ...webhook,
+    events: parseEvents(webhook.events),
+  }));
+};
+
+export const hardDelete = (db: dbClient, webhookPublicId: string) => {
+  return db
+    .delete(workspaceWebhooks)
+    .where(eq(workspaceWebhooks.publicId, webhookPublicId));
+};