Replace cookie use with localStorage

Avoid use of cookies which are always sent to the server, so they
are subject to privacy laws. Instead it makes use of browser local
storage, something that is persistent and not exposed to the
server side.

Change-Id: I8be5c87267e366f0cf152145002c3d3f541add80

1 files changed, 3 insertions, 20 deletions

diff --git a/web/src/containers/timezone/SelectTz.jsx b/web/src/containers/timezone/SelectTz.jsx
index 78092d2ab..b8e5060be 100644
--- a/web/src/containers/timezone/SelectTz.jsx
+++ b/web/src/containers/timezone/SelectTz.jsx
@@ -30,35 +30,18 @@ class SelectTz extends React.Component {
 
   componentDidMount () {
     this.loadState()
+    window.addEventListener('storage', this.loadState)
   }
 
   handleChange = (selectedTz) => {
     const tz = selectedTz.value
 
-    this.setCookie('zuul_tz_string', tz)
+    localStorage.setItem('zuul_tz_string', tz)
     this.updateState(tz)
   }
 
-  setCookie (name, value) {
-    document.cookie = name + '=' + value + '; path=/'
-  }
-
   loadState = () => {
-    function readCookie (name, defaultValue) {
-      let nameEQ = name + '='
-      let ca = document.cookie.split(';')
-      for (let i = 0; i < ca.length; i++) {
-        let c = ca[i]
-        while (c.charAt(0) === ' ') {
-          c = c.substring(1, c.length)
-        }
-        if (c.indexOf(nameEQ) === 0) {
-          return c.substring(nameEQ.length, c.length)
-        }
-      }
-      return defaultValue
-    }
-    let tz = readCookie('zuul_tz_string', '')
+    let tz = localStorage.getItem('zuul_tz_string') || ''
     if (tz) {
       this.updateState(tz)
     }