allow adding field via recipient token for signing

apps/web/components/editor/pdf-signer.tsx

@@ -173,7 +173,11 @@ export default function PDFSigner(props: any) {
       FieldType.FREE_SIGNATURE
     );
 
-    createOrUpdateField(props.document, freeSignatureField).then((res) => {
+    createOrUpdateField(
+      props.document,
+      freeSignatureField,
+      recipient.token
+    ).then((res) => {
       setFields(fields.concat(res));
       setDialogField(res);
       setOpen(true);

apps/web/pages/api/documents/[id]/fields/index.ts

@@ -36,8 +36,10 @@ async function getHandler(req: NextApiRequest, res: NextApiResponse) {
 }
 
 async function postHandler(req: NextApiRequest, res: NextApiResponse) {
-  const user = await getUserFromToken(req, res);
-  const { id: documentId } = req.query;
+  const { token: recipientToken } = req.query;
+  let user = null;
+  if (!recipientToken) user = await getUserFromToken(req, res);
+  if (!user && !recipientToken) return res.status(401).end();
   const body: {
     id: number;
     type: FieldType;
@@ -48,18 +50,30 @@ async function postHandler(req: NextApiRequest, res: NextApiResponse) {
     customText: string;
   } = req.body;
 
-  if (!user) return;
-
+  const { id: documentId } = req.query;
   if (!documentId) {
-    res.status(400).send("Missing parameter documentId.");
-    return;
+    return res.status(400).send("Missing parameter documentId.");
   }
 
-  const document: PrismaDocument = await getDocument(+documentId, req, res);
+  if (recipientToken) {
+    const recipient = await prisma.recipient.findFirst({
+      where: { token: recipientToken?.toString() },
+    });
 
+    if (!recipient || recipient?.documentId !== +documentId)
+      return res
+        .status(401)
+        .send("Recipient does not have access to this document.");
+  }
+
+  if (user) {
+    const document: PrismaDocument = await getDocument(+documentId, req, res);
     // todo entity ownerships checks
     if (document.userId !== user.id) {
-    return res.status(401).send("User does not have access to this document.");
+      return res
+        .status(401)
+        .send("User does not have access to this document.");
+    }
   }
 
   const field = await prisma.field.upsert({

packages/lib/api/createOrUpdateField.ts

@@ -2,11 +2,12 @@ import toast from "react-hot-toast";
 
 export const createOrUpdateField = async (
   document: any,
-  field: any
+  field: any,
+  recipientToken: string = ""
 ): Promise<any> => {
   try {
     const created = await toast.promise(
-      fetch("/api/documents/" + document.id + "/fields", {
+      fetch("/api/documents/" + document.id + "/fields?token=" + recipientToken, {
         method: "POST",
         headers: {
           "Content-Type": "application/json",