feat: add API endpoint to reject documents on behalf of recipients

Programmatically record an external rejection on behalf of a recipient
who declined outside the platform. Flags the rejection as external in
the audit log, optionally attributes it to a specific team member via
actAsEmail, and enforces team membership and document visibility.

packages/lib/server-only/document/reject-document-on-behalf-of.ts

@@ -0,0 +1,207 @@
+import { jobs } from '@documenso/lib/jobs/client';
+import { prisma } from '@documenso/prisma';
+import { DocumentStatus, EnvelopeType, SigningStatus } from '@prisma/client';
+
+import { AppError, AppErrorCode } from '../../errors/app-error';
+import { DOCUMENT_AUDIT_LOG_TYPE } from '../../types/document-audit-logs';
+import type { ApiRequestMetadata } from '../../universal/extract-request-metadata';
+import { createDocumentAuditLogData } from '../../utils/document-audit-logs';
+import { mapSecondaryIdToDocumentId } from '../../utils/envelope';
+import { assertRecipientNotExpired } from '../../utils/recipients';
+import { buildTeamWhereQuery } from '../../utils/teams';
+import { getEnvelopeWhereInput } from '../envelope/get-envelope-by-id';
+
+export type RejectDocumentOnBehalfOfOptions = {
+  /**
+   * The ID of the envelope the recipient belongs to. Required so the caller
+   * targets an explicit envelope/recipient combination rather than resolving the
+   * envelope implicitly from the recipient ID.
+   */
+  envelopeId: string;
+  recipientId: number;
+  userId: number;
+  teamId: number;
+  reason: string;
+  /**
+   * The email of a team member to attribute the rejection to. Must be a member
+   * of the team. When omitted the rejection is attributed to the API user that
+   * owns the token (`userId`).
+   *
+   * This exists so external applications can elect which team member is acting
+   * on behalf of the recipient, rather than always defaulting to the API user.
+   */
+  actAsEmail?: string;
+  requestMetadata: ApiRequestMetadata;
+};
+
+/**
+ * Reject a document on behalf of a recipient as an authenticated API user.
+ *
+ * This is used to programmatically record a rejection for cases where the
+ * recipient declined to sign outside of the platform (e.g. before ever
+ * reaching it). The rejection is flagged as `isExternal` in the audit log to
+ * distinguish it from a rejection performed by the recipient directly.
+ *
+ * The action can optionally be attributed to a specific team member via
+ * `actAsEmail`; otherwise it is attributed to the API user.
+ */
+export async function rejectDocumentOnBehalfOf({
+  envelopeId,
+  recipientId,
+  userId,
+  teamId,
+  reason,
+  actAsEmail,
+  requestMetadata,
+}: RejectDocumentOnBehalfOfOptions) {
+  // Build the access-controlled envelope query. This enforces team membership
+  // AND document visibility (and owner / team-email access), mirroring the
+  // canonical envelope access checks used across the app.
+  const { envelopeWhereInput } = await getEnvelopeWhereInput({
+    id: { type: 'envelopeId', id: envelopeId },
+    type: EnvelopeType.DOCUMENT,
+    userId,
+    teamId,
+  });
+
+  const recipient = await prisma.recipient.findFirst({
+    where: {
+      id: recipientId,
+      envelope: envelopeWhereInput,
+    },
+    include: {
+      envelope: true,
+    },
+  });
+
+  const envelope = recipient?.envelope;
+
+  if (!recipient || !envelope) {
+    throw new AppError(AppErrorCode.NOT_FOUND, {
+      message: 'Document or recipient not found',
+    });
+  }
+
+  if (envelope.status !== DocumentStatus.PENDING) {
+    throw new AppError(AppErrorCode.INVALID_REQUEST, {
+      message: `Document ${envelope.id} must be pending to reject`,
+    });
+  }
+
+  if (recipient.signingStatus !== SigningStatus.NOT_SIGNED) {
+    throw new AppError(AppErrorCode.INVALID_REQUEST, {
+      message: `Recipient ${recipient.id} has already actioned this document`,
+    });
+  }
+
+  assertRecipientNotExpired(recipient);
+
+  // Resolve the user the rejection should be attributed to. When `actAsEmail`
+  // is supplied it must resolve to a member of the team; otherwise the rejection
+  // is attributed to the API user that owns the token.
+  const electedUser = await getValidatedElectedUser({ actAsEmail, teamId });
+  const actingUser = electedUser ?? (await prisma.user.findFirstOrThrow({ where: { id: userId } }));
+
+  // Update the recipient status to rejected and record an external rejection
+  // audit log within the same transaction.
+  const [updatedRecipient] = await prisma.$transaction([
+    prisma.recipient.update({
+      where: {
+        id: recipient.id,
+      },
+      data: {
+        signedAt: new Date(),
+        signingStatus: SigningStatus.REJECTED,
+        rejectionReason: reason,
+      },
+    }),
+    prisma.documentAuditLog.create({
+      data: createDocumentAuditLogData({
+        envelopeId: envelope.id,
+        type: DOCUMENT_AUDIT_LOG_TYPE.DOCUMENT_RECIPIENT_REJECTED,
+        // Always attribute the audit log to a concrete user: the elected team
+        // member when supplied, otherwise the API user that owns the token.
+        user: { id: actingUser.id, email: actingUser.email, name: actingUser.name },
+        metadata: requestMetadata,
+        data: {
+          recipientEmail: recipient.email,
+          recipientName: recipient.name,
+          recipientId: recipient.id,
+          recipientRole: recipient.role,
+          reason,
+          isExternal: true,
+          // Only set when a member was explicitly elected via `actAsEmail`.
+          onBehalfOfUserEmail: electedUser?.email,
+          onBehalfOfUserName: electedUser?.name,
+        },
+      }),
+    }),
+  ]);
+
+  const legacyDocumentId = mapSecondaryIdToDocumentId(envelope.secondaryId);
+
+  // Trigger the seal document job to process the document asynchronously.
+  await jobs.triggerJob({
+    name: 'internal.seal-document',
+    payload: {
+      documentId: legacyDocumentId,
+      requestMetadata: requestMetadata.requestMetadata,
+    },
+  });
+
+  // Send email notifications to the rejecting recipient.
+  await jobs.triggerJob({
+    name: 'send.signing.rejected.emails',
+    payload: {
+      recipientId: recipient.id,
+      documentId: legacyDocumentId,
+    },
+  });
+
+  // Send cancellation emails to other recipients.
+  await jobs.triggerJob({
+    name: 'send.document.cancelled.emails',
+    payload: {
+      documentId: legacyDocumentId,
+      cancellationReason: reason,
+      requestMetadata: requestMetadata.requestMetadata,
+    },
+  });
+
+  return updatedRecipient;
+}
+
+/**
+ * Resolve and validate the team member elected via `actAsEmail`. Returns `null`
+ * when no `actAsEmail` is supplied (the rejection is then attributed to the API
+ * user). Throws when the email does not resolve to a member of the team.
+ */
+const getValidatedElectedUser = async ({ actAsEmail, teamId }: { actAsEmail?: string; teamId: number }) => {
+  if (!actAsEmail) {
+    return null;
+  }
+
+  const electedUser = await prisma.user.findFirst({
+    where: {
+      email: actAsEmail,
+    },
+  });
+
+  if (!electedUser) {
+    throw new AppError(AppErrorCode.UNAUTHORIZED, {
+      message: 'The user to act on behalf of must be a member of the team',
+    });
+  }
+
+  const isTeamMember = await prisma.team.findFirst({
+    where: buildTeamWhereQuery({ teamId, userId: electedUser.id }),
+  });
+
+  if (!isTeamMember) {
+    throw new AppError(AppErrorCode.UNAUTHORIZED, {
+      message: 'The user to act on behalf of must be a member of the team',
+    });
+  }
+
+  return electedUser;
+};