Allow document to be dragged to the top of a collection (#4489)

server/routes/api/documents/documents.test.ts

@@ -1910,7 +1910,22 @@ describe("#documents.move", () => {
     });
     const body = await res.json();
     expect(res.status).toEqual(400);
-    expect(body.message).toEqual("index: Number must be greater than 0");
+    expect(body.message).toEqual(
+      "index: Number must be greater than or equal to 0"
+    );
+  });
+
+  it("should move doc to the top of collection as its first child", async () => {
+    const { user, document, collection } = await seed();
+    const res = await server.post("/api/documents.move", {
+      body: {
+        token: user.getJwtToken(),
+        id: document.id,
+        collectionId: collection.id,
+        index: 0,
+      },
+    });
+    expect(res.status).toEqual(200);
   });
 
   it("should move the document", async () => {

server/routes/api/documents/schema.ts

@@ -208,7 +208,7 @@ export const DocumentsMoveSchema = BaseIdSchema.extend({
   parentDocumentId: z.string().uuid().optional(),
 
   /** Helps evaluate the new index in collection structure upon move */
-  index: z.number().positive().optional(),
+  index: z.number().gte(0).optional(),
 }).refine((obj) => !(obj.parentDocumentId === obj.id), {
   message: "infinite loop detected, cannot nest a document inside itself",
 });