renew init method

browser/main/lib/dataApi/resolveStorageData.js

@@ -0,0 +1,39 @@
+const _ = require('lodash')
+const path = require('path')
+const CSON = require('season')
+const transform = require('./transform')
+
+function resolveStorageData (storageCache) {
+  let storage = {
+    key: storageCache.key,
+    name: storageCache.name,
+    type: storageCache.type,
+    path: storageCache.path
+  }
+
+  const boostnoteJSONPath = path.join(storageCache.path, 'boostnote.json')
+  try {
+    let jsonData = CSON.readFileSync(boostnoteJSONPath)
+    if (!_.isArray(jsonData.folders)) throw new Error('folders should be an array.')
+    storage.folders = jsonData.folders
+    storage.version = jsonData.version
+  } catch (err) {
+    if (err.code === 'ENOENT') {
+      console.warn('boostnote.json file doesn\'t exist the given path')
+      CSON.writeFileSync(boostnoteJSONPath, {folders: [], version: '1.0'})
+    } else {
+      console.error(err)
+    }
+    storage.folders = []
+    storage.version = '1.0'
+  }
+
+  if (storage.version === '1.0') {
+    return Promise.resolve(storage)
+  }
+  console.log('Transform Legacy storage', storage.path)
+  return transform(storage.path)
+    .then(() => storage)
+}
+
+module.exports = resolveStorageData