core: note title reset on updating a note

packages/core/__tests__/notes.test.ts

@@ -121,6 +121,19 @@ test("setting note title to empty should set the default title", () =>
     expect(note?.title.startsWith("Note ")).toBe(true);
   }));
 
+test("changing content shouldn't reset the note title ", () =>
+  noteTest({ title: "I am a note" }).then(async ({ db, id }) => {
+    await db.notes.add({
+      id,
+      content: {
+        type: TEST_NOTE.content.type,
+        data: "<p>This is a very colorful existence.</p>"
+      }
+    });
+    const note = await db.notes.note(id);
+    expect(note?.title).toBe("I am a note");
+  }));
+
 test("note should get headline from content", () =>
   noteTest({
     ...TEST_NOTE,

packages/core/src/collections/notes.ts

@@ -109,17 +109,21 @@ export class Notes implements ICollection {
         });
       }
 
-      if (item.title) {
+      if (typeof item.title !== "undefined") {
         item.title = item.title.replace(NEWLINE_STRIP_REGEX, " ");
         dateEdited = Date.now();
-      } else {
-        item.title = formatTitle(
-          this.db.settings.getTitleFormat(),
-          this.db.settings.getDateFormat(),
-          this.db.settings.getTimeFormat(),
-          headline?.split(" ").splice(0, 10).join(" ") || "",
-          this.totalNotes
-        );
+      }
+
+      if (!isUpdating || item.title === "") {
+        item.title =
+          item.title ||
+          formatTitle(
+            this.db.settings.getTitleFormat(),
+            this.db.settings.getDateFormat(),
+            this.db.settings.getTimeFormat(),
+            headline?.split(" ").splice(0, 10).join(" ") || "",
+            this.totalNotes
+          );
       }
 
       if (isUpdating) {