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diff --git a/keyserver/src/endpoints.js b/keyserver/src/endpoints.js
--- a/keyserver/src/endpoints.js
+++ b/keyserver/src/endpoints.js
@@ -19,6 +19,7 @@
} from './responders/entry-responders.js';
import type { JSONResponder } from './responders/handlers.js';
import { getSessionPublicKeysResponder } from './responders/keys-responders.js';
+import { inviteLinkVerificationResponder } from './responders/link-responders.js';
import { messageReportCreationResponder } from './responders/message-report-responder.js';
import {
textMessageCreationResponder,
@@ -250,6 +251,10 @@
responder: codeVerificationResponder,
requiredPolicies: baseLegalPolicies,
},
+ verify_invite_link: {
+ responder: inviteLinkVerificationResponder,
+ requiredPolicies: baseLegalPolicies,
+ },
siwe_nonce: {
responder: siweNonceResponder,
requiredPolicies: [],
diff --git a/keyserver/src/fetchers/link-fetchers.js b/keyserver/src/fetchers/link-fetchers.js
new file mode 100644
--- /dev/null
+++ b/keyserver/src/fetchers/link-fetchers.js
@@ -0,0 +1,42 @@
+// @flow
+
+import type {
+ InviteLinkVerificationRequest,
+ InviteLinkVerificationResponse,
+} from 'lib/types/link-types.js';
+
+import { dbQuery, SQL } from '../database/database.js';
+import { Viewer } from '../session/viewer.js';
+
+async function verifyInviteLink(
+ viewer: Viewer,
+ request: InviteLinkVerificationRequest,
+): Promise<InviteLinkVerificationResponse> {
+ const query = SQL`
+ SELECT c.name, i.community AS communityID, m.role
+ FROM invite_links i
+ INNER JOIN threads c ON c.id = i.community
+ LEFT JOIN memberships m
+ ON m.thread = i.community AND m.user = ${viewer.userID}
+ WHERE i.name = ${request.secret}
+ AND c.community IS NULL
+ `;
+ const [result] = await dbQuery(query);
+ if (result.length === 0) {
+ return {
+ status: 'invalid',
+ };
+ }
+
+ const { name, communityID, role } = result[0];
+ const status = role > 0 ? 'already_joined' : 'valid';
+ return {
+ status,
+ community: {
+ name,
+ id: communityID.toString(),
+ },
+ };
+}
+
+export { verifyInviteLink };
diff --git a/keyserver/src/responders/link-responders.js b/keyserver/src/responders/link-responders.js
new file mode 100644
--- /dev/null
+++ b/keyserver/src/responders/link-responders.js
@@ -0,0 +1,32 @@
+// @flow
+
+import t from 'tcomb';
+
+import type {
+ InviteLinkVerificationRequest,
+ InviteLinkVerificationResponse,
+} from 'lib/types/link-types.js';
+import { tShape } from 'lib/utils/validation-utils.js';
+
+import { verifyInviteLink } from '../fetchers/link-fetchers.js';
+import { Viewer } from '../session/viewer.js';
+import { validateInput } from '../utils/validation-utils.js';
+
+const inviteLinkVerificationRequestInputValidator = tShape({
+ secret: t.String,
+});
+
+async function inviteLinkVerificationResponder(
+ viewer: Viewer,
+ input: any,
+): Promise<InviteLinkVerificationResponse> {
+ const request: InviteLinkVerificationRequest = input;
+ await validateInput(
+ viewer,
+ inviteLinkVerificationRequestInputValidator,
+ request,
+ );
+ return await verifyInviteLink(viewer, request);
+}
+
+export { inviteLinkVerificationResponder };
diff --git a/lib/types/endpoints.js b/lib/types/endpoints.js
--- a/lib/types/endpoints.js
+++ b/lib/types/endpoints.js
@@ -84,6 +84,7 @@
UPDATE_THREAD: 'update_thread',
UPDATE_USER_SUBSCRIPTION: 'update_user_subscription',
VERIFY_CODE: 'verify_code',
+ VERIFY_INVITE_LINK: 'verify_invite_link',
SIWE_NONCE: 'siwe_nonce',
SIWE_AUTH: 'siwe_auth',
UPDATE_USER_AVATAR: 'update_user_avatar',
diff --git a/lib/types/link-types.js b/lib/types/link-types.js
new file mode 100644
--- /dev/null
+++ b/lib/types/link-types.js
@@ -0,0 +1,17 @@
+// @flow
+
+export type InviteLinkVerificationRequest = {
+ +secret: string,
+};
+
+export type InviteLinkVerificationResponse =
+ | {
+ +status: 'valid' | 'already_joined',
+ +community: {
+ +name: string,
+ +id: string,
+ },
+ }
+ | {
+ +status: 'invalid' | 'expired',
+ };

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