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

packages/rocketchat-lib/server/models/Messages.coffee

@@ -101,6 +101,13 @@ RocketChat.models.Messages = new class extends RocketChat.models._Base
 
 		return @find query, options
 
+	getLastTimestamp: (options = {}) ->
+		query = { ts: { $exists: 1 } }
+		options.sort = { ts: -1 }
+		options.limit = 1
+
+		return @find(query, options)?.fetch?()?[0]?.ts
+
 	cloneAndSaveAsHistoryById: (_id) ->
 		me = RocketChat.models.Users.findOneById Meteor.userId()
 		record = @findOneById _id

packages/rocketchat-lib/server/models/Subscriptions.coffee

@@ -25,6 +25,12 @@ RocketChat.models.Subscriptions = new class extends RocketChat.models._Base
 
 		return @find query, options
 
+	getLastSeen: (options = {}) ->
+		query = { ls: { $exists: 1 } }
+		options.sort = { ls: -1 }
+		options.limit = 1
+
+		return @find(query, options)?.fetch?()?[0]?.ls
 
 	# UPDATE
 	archiveByRoomIdAndUserId: (roomId, userId) ->
@@ -195,11 +201,11 @@ RocketChat.models.Subscriptions = new class extends RocketChat.models._Base
 		return @update query, update, { multi: true }
 
 	updateTypeByRoomId: (roomId, type) ->
-		query = 
+		query =
 			rid: roomId
-		
+
 		update =
-			$set: 
+			$set:
 				t: type
 
 		return @update query, update, { multi: true }

packages/rocketchat-lib/server/models/Users.coffee

@@ -99,6 +99,12 @@ RocketChat.models.Users = new class extends RocketChat.models._Base
 
 		return @find query, options
 
+	getLastLogin: (options = {}) ->
+		query = { lastLogin: { $exists: 1 } }
+		options.sort = { lastLogin: -1 }
+		options.limit = 1
+
+		return @find(query, options)?.fetch?()?[0]?.lastLogin
 
 	# UPDATE
 	updateLastLoginById: (_id) ->

packages/rocketchat-statistics/server/functions/get.coffee

@@ -3,8 +3,9 @@ RocketChat.statistics.get = ->
 
 	# Version
 	statistics.uniqueId = RocketChat.settings.get("uniqueID")
-	statistics.version = BuildInfo?.commit?.hash
-	statistics.versionDate = BuildInfo?.commit?.date
+	statistics.version = RocketChat.Info?.version
+	statistics.tag = RocketChat.Info?.tag
+	statistics.branch = RocketChat.Info?.branch
 
 	# User statistics
 	statistics.totalUsers = Meteor.users.find().count()
@@ -70,6 +71,14 @@ RocketChat.statistics.get = ->
 	else
 		console.log 'private group user statistic not found'.red
 
+	statistics.lastLogin = RocketChat.models.Users.getLastLogin()
+	statistics.lastMessageSentAt = RocketChat.models.Messages.getLastTimestamp()
+	statistics.lastSeenSubscription = RocketChat.models.Subscriptions.getLastSeen()
+
+	migration = Migrations?._getControl()
+	if migration
+		statistics.migration = _.pick(migration, 'version', 'locked')
+
 	os = Npm.require('os')
 	statistics.os =
 		type: os.type()