Refactoring to Svelte - still a bit messy

Also, issues with eslint

src/stores.ts

@@ -1,6 +1,34 @@
-import { writable } from 'svelte/store'
+import { get, writable } from 'svelte/store'
 import type { ResultNote } from './globals'
 
-export const selectedNoteId = writable<string>('')
+// export const selectedNoteId = writable<string>('')
 export const searchQuery = writable<string>('')
 export const resultNotes = writable<ResultNote[]>([])
+
+function createSelectedNote() {
+  const { subscribe, set, update } = writable<ResultNote|null>(null)
+  return {
+    subscribe,
+    set,
+    next: () =>
+      update(v => {
+        const notes = get(resultNotes)
+        let id = notes.findIndex(n => n.path === v?.path)
+        if (!notes.length) return null
+        if (id === -1) return notes[0]
+        id = id < notes.length - 1 ? id + 1 : 0
+        return notes[id]
+      }),
+    previous: () =>
+      update(v => {
+        const notes = get(resultNotes)
+        let id = notes.findIndex(n => n.path === v?.path)
+        if (!notes.length) return null
+        if (id === -1) return notes[0]
+        id = id > 0 ? id - 1 : notes.length - 1
+        return notes[id]
+      }),
+  }
+}
+
+export const selectedNote = createSelectedNote()