1 files changed, 15 insertions, 1 deletions
diff --git a/lib/history.js b/lib/history.js
index f46ff49f..c7d2472c 100644
--- a/lib/history.js
+++ b/lib/history.js
@@ -1,6 +1,7 @@
 'use strict'
 // history
 // external modules
+var LZString = require('lz-string')
 
 // core
 var config = require('./config')
@@ -27,7 +28,20 @@ function getHistory (userid, callback) {
     }
     var history = {}
     if (user.history) {
-      history = parseHistoryToObject(JSON.parse(user.history))
+      history = JSON.parse(user.history)
+      // migrate LZString encoded note id to base64url encoded note id
+      for (let i = 0, l = history.length; i < l; i++) {
+        try {
+          let id = LZString.decompressFromBase64(history[i].id)
+          if (id && models.Note.checkNoteIdValid(id)) {
+            history[i].id = models.Note.encodeNoteId(id)
+          }
+        } catch (err) {
+          // most error here comes from LZString, ignore
+          logger.error(err)
+        }
+      }
+      history = parseHistoryToObject(history)
     }
     if (config.debug) {
       logger.info('read history success: ' + user.id)