fix: tidy code and update endpoints

packages/lib/server-only/share/create-or-get-share-link.ts

@@ -0,0 +1,58 @@
+import { P, match } from 'ts-pattern';
+
+import { prisma } from '@documenso/prisma';
+
+import { alphaid } from '../../universal/id';
+
+export type CreateSharingIdOptions =
+  | {
+      documentId: number;
+      token: string;
+    }
+  | {
+      documentId: number;
+      userId: number;
+    };
+
+export const createOrGetShareLink = async ({ documentId, ...options }: CreateSharingIdOptions) => {
+  const email = await match(options)
+    .with({ token: P.string }, async ({ token }) => {
+      return await prisma.recipient
+        .findFirst({
+          where: {
+            documentId,
+            token,
+          },
+        })
+        .then((recipient) => recipient?.email);
+    })
+    .with({ userId: P.number }, async ({ userId }) => {
+      return await prisma.user
+        .findFirst({
+          where: {
+            id: userId,
+          },
+        })
+        .then((user) => user?.email);
+    })
+    .exhaustive();
+
+  if (!email) {
+    throw new Error('Unable to create share link for document with the given email');
+  }
+
+  return await prisma.documentShareLink.upsert({
+    where: {
+      documentId_email: {
+        email,
+        documentId,
+      },
+    },
+    create: {
+      email,
+      documentId,
+      slug: alphaid(14),
+    },
+    update: {},
+  });
+};