* convert statistics package to js

* amend

* fix code style

* More sync with `more-streams`

* Use super instead of _initModel for models

* Change file encoding

* Fix last commit

* Fix data find

Fixes #2747

* Add function to handle errors

* Delete message errors

* handle error for hideRoom

* Allow returning error instead of calling toastr.error

* Handle error for leaveRoom

* handle error for openRoom

* handleError for toggleFavorite

* handleError in updateMessage

* error for samlLogout

* handleError for assets

* Add global handleError to eslint

* handleError for addOAuthService

* handleError: getUserRoles

* handleError: insertOrUpdateUsere

* handleError: messageDeleting

* handleError: removeUserFromRoles

* handleError: addPermissionToRole

* handleError: addUserToRole

* handleError: deleteRole

* handleError: removeRoleFromPermission

* handleError: removeUserFromRole

* handleError: saveRole

* Return ready on publish without permission

* handleError: channel-settings

* handleError: mailMessages

* handleError: fileUpload

* handleError: rocketchat-importer

* handleError: addIncomingIntegration

* handleError: deleteIncomingIntegration

* handleError: updateIncomingIntegration

* handleError: addOutgoingIntegration

* handleError: deleteOutgoingIntegration

* handleError: updateOutgoingIntegration

* Return ready on publish without permission

* handleError ldap

* remove throw from client code

* handleError: setEmail, slashCommand

* Sort en.i18n.json

* Google translated languages

* Use correct error return from publishes

* RateLimiter.limitFunction

* Fix order of error "500"

* handleError validateEmailDomain

* handleError channelSettings; settings

* handleError livechat

* handleError: Mailer.sendMail

* handleError pinMessage and unpinMessage

* handleError messageStarring

* handleError oauth apps

* handleError: saveNotificationSettings

* handleError getRoomRoles

* handleError: createDirectMessage

* handleError saveUserPreferences

* handleError: saveUserProfile

* handleError sendConfirmationEmail

* Add ecmascript to root

* handleError: avatar

* handleError: getStatistics

* handleError: roomSetting

* handleError: channelSettings

* handleError: sendInvitationEmail

* handleError: addUserToRoom

* handleError: uploadedFilesList

* Change error key on user edit

* handleError: userInfo

* handleError: userRegistration

* handleError: createChannel

* handleError: createPrivateGroup

* handleError: setUserPassword

* handleError setUserActiveStatus

* handleError: accoutns

* A few more errors thrown

* Error: livechat publishes

* Errors in methods

* handleError searchAgent

* Add errors handling

More errors handling

Auto-translation for all languages

* Permalink

New statistics: lastLogin, lastMessageSentAt, lastSeenSubscription, migration, version, branch and tag

based authorization

Leverages alanning:roles package to associate a user to a role.  Uses
alanning:roles optional "group" parameter to limit the role's scope to
either the global level or room level.  The global level is applicable
to users that can perform administrative functions.  The room level is
applicable to users that can perform room specific administrative
functions (like a moderator).

A role can have zero or more permissions.  Permissions and their
association to roles are defined by this package

Authorization checks are based on whether or not the user has a role or permission.

The roles, permissions, and their association are statically defined at
this time.  Eventually, there should be an API to dynamically create a
role and associate it to static permission(s).

Old 'isAdmin' and '.admin is true'  checks have been replaced with
corresponding hasPermission authorization checks.  Additionally, code
that automatically assigned admin privileges are updated to assign
'admin' role instead.

channel/direct message/private group code checks authorization to edit
properties (e.g. title) and edit/delete messages (regardless of the
system level allow edit/delete settings).
- user with 'admin' role are authorized to do anything
- room creator is assigned 'moderator' role that can edit the room and
  edit/delete messages
- members can only edit/delete their own messages IF system wide
  settings permit them to.

v19 migration will
- add 'admin' role to users with admin:true property
- add 'moderator' role scoped to room for room creators
- add 'user' role to all users.

There are known issues unrelated to the changes made
- If a user with edit/delete message room permissions logs out then a user without
  edit/delete message room permissions logs in, then they will see
edit/delete icons.  The server will deny execution
- edit/delete icons are not reactive   Thus if the system level allow
  edit/delete message setting is toggled, the icons will not reflect it.
The server will deny execution.