feat: Realtime init returns terminate function

src/lib/realtime.js

@@ -5,6 +5,8 @@ const APPS_DOCTYPE = 'io.cozy.apps'
 /**
  * Initialize realtime sockets
  *
+ * Returns function that closes the realtime and unsubscribe handlers
+ *
  * @private
  * @param {object}
  * @returns {Promise}
@@ -30,13 +32,22 @@ function initializeRealtime({ getApp, onCreate, onDelete, cozyClient }) {
     }
   }
 
+  let realtime
   try {
-    const realtime = new CozyRealtime({ cozyClient })
+    realtime = new CozyRealtime({ cozyClient })
     realtime.subscribe('created', APPS_DOCTYPE, handleAppCreation)
     realtime.subscribe('deleted', APPS_DOCTYPE, handleAppRemoval)
   } catch (error) {
     console.warn(`Cannot initialize realtime in Cozy-bar: ${error.message}`)
   }
+
+  return () => {
+    if (!realtime) {
+      return
+    }
+    realtime.unsubscribe('created', APPS_DOCTYPE, handleAppCreation)
+    realtime.unsubscribe('deleted', APPS_DOCTYPE, handleAppRemoval)
+  }
 }
 
 export default initializeRealtime