Add maintenance banner on UI (#797)

* fix bug on email separator

Signed-off-by: Denis barbaron <denis.barbaron@orange.com>

* allow group name change

Signed-off-by: Denis barbaron <denis.barbaron@orange.com>

* add maintenance banner on UI

Signed-off-by: Denis barbaron <denis.barbaron@orange.com>

* removes unnecessary comments

Signed-off-by: Denis barbaron <denis.barbaron@orange.com>

---------

Signed-off-by: Denis barbaron <denis.barbaron@orange.com>

lib/units/api/controllers/users.js

@@ -1,5 +1,5 @@
 /**
-* Copyright © 2019 code initially contributed by Orange SA, authors: Denis Barbaron - Licensed under the Apache license 2.0
+* Copyright © 2019-2024 code initially contributed by Orange SA, authors: Denis Barbaron - Licensed under the Apache license 2.0
 **/
 
 const dbapi = require('../../../db/api')
@@ -11,6 +11,7 @@ const wire = require('../../../wire')
 const wireutil = require('../../../wire/util')
 const userapi = require('./user')
 
+
 /* --------------------------------- PRIVATE FUNCTIONS --------------------------------------- */
 
 function userApiWrapper(fn, req, res) {
@@ -142,6 +143,92 @@ function getUserInfo(req, email) {
   })
 }
 
+function updateUsersAlertMessage(req, res) {
+  const lock = {}
+
+  return dbapi.lockUser(req.user.email).then(function(stats) {
+    if (!stats.replaced) {
+      return apiutil.lightComputeStats(res, stats)
+    }
+    lock.user = stats.changes[0].new_val
+
+    return dbapi.updateUsersAlertMessage(req.body).then(function(stats) {
+      if (stats.unchanged) {
+        dbapi.loadUser(req.user.email).then(function(user) {
+          apiutil.respond(res, 200, 'Unchanged (users alert message)',
+            {alertMessage: user.settings.alertMessage})
+        })
+      }
+      else {
+        apiutil.respond(res, 200, 'Updated (users alert message)',
+          {alertMessage: stats.changes[0].new_val.settings.alertMessage})
+      }
+    })
+    .catch(function(err) {
+      apiutil.internalError(res, 'Failed to update users alert message: ', err.stack)
+    })
+  })
+  .catch(function(err) {
+    if (err !== 'busy') {
+      throw err
+    }
+  })
+  .finally(function() {
+    lockutil.unlockUser(lock)
+  })
+}
+
+function getUsersAlertMessage(req, res) {
+  const fields = req.swagger.params.fields.value
+
+  dbapi.getRootGroup().then(function(group) {
+    return dbapi.loadUser(group.owner.email).then(function(user) {
+      if (typeof user.settings.alertMessage === 'undefined') {
+        const lock = {}
+
+        return dbapi.lockUser(req.user.email).then(function(stats) {
+          if (!stats.replaced) {
+            return apiutil.lightComputeStats(res, stats)
+          }
+          lock.user = stats.changes[0].new_val
+          const alertMessage = {
+            activation: 'False'
+          , data: '*** this site is currently under maintenance, please wait ***'
+          , level: 'Critical'
+          }
+
+          return dbapi.updateUsersAlertMessage(alertMessage).then(function(stats) {
+            if (!stats.errors) {
+              return stats.changes[0].new_val.settings.alertMessage
+            }
+            throw new Error('Failed to initialize users alert message')
+          })
+        })
+        .finally(function() {
+          lockutil.unlockUser(lock)
+        })
+      }
+      return user.settings.alertMessage
+    })
+    .then(function(alertMessage) {
+      if (fields) {
+        return _.pick(alertMessage, fields.split(','))
+      }
+      else {
+        return alertMessage
+      }
+    })
+    .then(function(alertMessage) {
+      apiutil.respond(res, 200, 'Users Alert Message', {alertMessage: alertMessage})
+    })
+  })
+  .catch(function(err) {
+    if (err !== 'busy') {
+      apiutil.internalError(res, 'Failed to get users alert message: ', err.stack)
+    }
+  })
+}
+
 function updateUserGroupsQuotas(req, res) {
   const email = req.swagger.params.email.value
   const duration =
@@ -379,6 +466,8 @@ module.exports = {
     updateUserGroupsQuotas: updateUserGroupsQuotas
   , updateDefaultUserGroupsQuotas: updateDefaultUserGroupsQuotas
   , getUsers: getUsers
+  , getUsersAlertMessage: getUsersAlertMessage
+  , updateUsersAlertMessage: updateUsersAlertMessage
   , getUserByEmail: getUserByEmail
   , getUserInfo: getUserInfo
   , createUser: createUser