WIP

step1/store.js

@@ -0,0 +1,45 @@
+import fs from 'node:fs/promises'
+import path from 'node:path'
+
+const filename = path.join(process.cwd(), 'db.json')
+
+const saveChanges = data => fs.writeFile(filename, JSON.stringify(data))
+const readData = async () => {
+  const data = await fs.readFile(filename, 'utf-8')
+  return JSON.parse(data)
+}
+
+const getAll = readData
+
+const getById = async (id) => {
+  const data = await readData()
+  return data.find(item => item.id === id)
+}
+
+const create = async (message) => {
+  const data = await readData()
+  const newItem = { message, id: data.length + 1 }
+  await saveChanges(data.concat([newItem]))
+  return newItem
+}
+
+const updateById = async (id, message) => {
+  const data = await readData()
+  const newData = data.map(current => {
+    if (current.id === id) {
+      return { ...current, message }
+    }
+    return current
+  })
+
+  await saveChanges(newData)
+}
+
+const deleteById = async id => {
+  const data = await readData()
+  await saveChanges(data
+    .filter(current => current.id !== id)
+  )
+}
+
+export { getAll, getById, create, updateById, deleteById }