feat: force signature fields for document signers

packages/lib/server-only/document/get-document-by-id.ts

@@ -34,6 +34,12 @@ export const getDocumentById = async ({ id, userId, teamId }: GetDocumentByIdOpt
           url: true,
         },
       },
+      Recipient: {
+        select: {
+          email: true,
+          role: true,
+        },
+      },
     },
   });
 };

packages/trpc/server/field-router/router.ts

@@ -1,6 +1,7 @@
 import { TRPCError } from '@trpc/server';
 
 import { AppError } from '@documenso/lib/errors/app-error';
+import { getDocumentById } from '@documenso/lib/server-only/document/get-document-by-id';
 import { removeSignedFieldWithToken } from '@documenso/lib/server-only/field/remove-signed-field-with-token';
 import { setFieldsForDocument } from '@documenso/lib/server-only/field/set-fields-for-document';
 import { setFieldsForTemplate } from '@documenso/lib/server-only/field/set-fields-for-template';
@@ -22,6 +23,27 @@ export const fieldRouter = router({
       try {
         const { documentId, fields } = input;
 
+        const document = await getDocumentById({
+          id: documentId,
+          userId: ctx.user.id,
+        }).catch(() => null);
+
+        const everySignerHasSignature = document?.Recipient.every(
+          (recipient) =>
+            recipient.role !== 'SIGNER' ||
+            fields.some(
+              (field) => field.type === 'SIGNATURE' && field.signerEmail === recipient.email,
+            ),
+        );
+
+        if (!everySignerHasSignature) {
+          throw new TRPCError({
+            code: 'BAD_REQUEST',
+            message:
+              'Some signers have not been assigned a signature field. Please assign a signature field to each signer before proceeding.',
+          });
+        }
+
         return await setFieldsForDocument({
           documentId,
           userId: ctx.user.id,