/WP7.1/Templates/VB/WPCloud.Mem/WindowsPhoneCloud.Web/Controllers/PushNotificationsController.vb

' ----------------------------------------------------------------------------------

' Microsoft Developer & Platform Evangelism

' 

' Copyright (c) Microsoft Corporation. All rights reserved.

' 

' THIS CODE AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, 

' EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES 

' OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.

' ----------------------------------------------------------------------------------

' The example companies, organizations, products, domain names,

' e-mail addresses, logos, people, places, and events depicted

' herein are fictitious.  No association with any real company,

' organization, product, domain name, email address, logo, person,

' places, or events is intended or should be inferred.

' ----------------------------------------------------------------------------------



Imports WindowsPhone.Recipes.Push.Messages

Imports Microsoft.WindowsAzure.StorageClient

Imports Microsoft.WindowsAzure

Imports Microsoft.Samples.WindowsPhoneCloud.Web.UserAccountWrappers

Imports Microsoft.Samples.WindowsPhoneCloud.Web.Models

Imports Microsoft.Samples.WindowsPhoneCloud.Web.Infrastructure

Imports System.Security.Cryptography.X509Certificates

Imports System.Security.Authentication

Imports System.Net.Sockets

Imports System.Net.Security

Imports System.IO

Imports System.Globalization



Namespace Controllers

    <CustomAuthorize(Roles:=PrivilegeConstants.AdminPrivilege)>

    Public Class PushNotificationsController

        Inherits Controller

        Private Const DefaultPort As Integer = 2195



        Private ReadOnly cloudQueueClient As CloudQueueClient

        Private ReadOnly pushUserEndpointsRepository As IPushUserEndpointsRepository



#If ACS Then

		Private ReadOnly userRepository As IUserRepository



		Public Sub New()

			Me.New(Nothing, New UserTablesServiceContext(), New UserTablesServiceContext())

		End Sub



		<CLSCompliant(False)> _

		Public Sub New(ByVal cloudQueueClient As CloudQueueClient, ByVal pushUserEndpointsRepository As IPushUserEndpointsRepository, ByVal userRepository As IUserRepository)

			If GetStorageAccountFromConfigurationSetting() Is Nothing Then

				If cloudQueueClient Is Nothing Then

					Throw New ArgumentNullException("cloudQueueClient", "Cloud Queue Client cannot be null if no configuration is loaded.")

				End If

			End If



			Me.cloudQueueClient = If(cloudQueueClient, GetStorageAccountFromConfigurationSetting().CreateCloudQueueClient())

			Me.userRepository = userRepository

			Me.pushUserEndpointsRepository = pushUserEndpointsRepository

		End Sub



		Public Function Microsoft() As ActionResult

			Dim users = Me.pushUserEndpointsRepository.GetAllPushUsers().Select(Function(userId) New UserModel With {.UserId = userId, .UserName = Me.userRepository.GetUser(userId).Name})



			Return Me.View(users)

		End Function

#Else

        Private ReadOnly membershipService As IMembershipService



        Public Sub New()

            Me.New(Nothing, New UserTablesServiceContext(), New AccountMembershipService())

        End Sub



        <CLSCompliant(False)> _

        Public Sub New(ByVal cloudQueueClient As CloudQueueClient, ByVal pushUserEndpointsRepository As IPushUserEndpointsRepository, ByVal membershipService As IMembershipService)

            If GetStorageAccountFromConfigurationSetting() Is Nothing Then

                If cloudQueueClient Is Nothing Then

                    Throw New ArgumentNullException("cloudQueueClient", "Cloud Queue Client cannot be null if no configuration is loaded.")

                End If

            End If



            Me.cloudQueueClient = If(cloudQueueClient, GetStorageAccountFromConfigurationSetting().CreateCloudQueueClient())

            Me.membershipService = membershipService

            Me.pushUserEndpointsRepository = pushUserEndpointsRepository

        End Sub



        Public Function Microsoft() As ActionResult

            Dim users = Me.pushUserEndpointsRepository.GetAllPushUsers().Select(Function(userId) New UserModel With {.UserId = userId, .UserName = Me.membershipService.GetUserByProviderUserKey(New Guid(userId)).UserName})



            Return Me.View(users)

        End Function

#End If



        Public Function Apple() As ActionResult

            Return Me.View()

        End Function



        <HttpPost()> _

        Public Function SendMicrosoftToast(ByVal userId As String, ByVal message As String) As ActionResult

            If String.IsNullOrWhiteSpace(message) Then

                Return Me.Json("The notification message cannot be null, empty nor white space.", JsonRequestBehavior.AllowGet)

            End If



            Dim resultList = New List(Of MessageSendResultLight)()

            Dim pushUserEndpoint = Me.pushUserEndpointsRepository.GetPushUsersByName(userId).FirstOrDefault()

            Dim uris = Me.pushUserEndpointsRepository.GetPushUsersByName(userId).Select(Function(u) u.ChannelUri)

            Dim toast = New ToastPushNotificationMessage With {.SendPriority = MessageSendPriority.High, .Title = message}



            For Each uri In uris

                Dim messageResult = toast.SendAndHandleErrors(New Uri(uri))

                resultList.Add(messageResult)

                If messageResult.Status.Equals(MessageSendResultLight.Success) Then

                    Me.QueueMessage(pushUserEndpoint, message)

                End If

            Next uri



            Return Me.Json(resultList, JsonRequestBehavior.AllowGet)

        End Function



        <HttpPost()> _

        Public Function SendMicrosoftTile(ByVal userId As String, ByVal message As String) As ActionResult

            If String.IsNullOrWhiteSpace(message) Then

                Return Me.Json("The notification message cannot be null, empty nor white space.", JsonRequestBehavior.AllowGet)

            End If



            Dim resultList = New List(Of MessageSendResultLight)()

            Dim pushUserEndpointList = Me.pushUserEndpointsRepository.GetPushUsersByName(userId)

            For Each pushUserEndpoint In pushUserEndpointList

                pushUserEndpoint.TileCount += 1

                Dim tile = New TilePushNotificationMessage With {.SendPriority = MessageSendPriority.High, .Count = pushUserEndpoint.TileCount}



                Dim messageResult = tile.SendAndHandleErrors(New Uri(pushUserEndpoint.ChannelUri))

                resultList.Add(messageResult)

                If messageResult.Status.Equals(MessageSendResultLight.Success) Then

                    Me.QueueMessage(pushUserEndpoint, message)



                    Me.pushUserEndpointsRepository.UpdatePushUserEndpoint(pushUserEndpoint)

                End If

            Next pushUserEndpoint



            Return Me.Json(resultList, JsonRequestBehavior.AllowGet)

        End Function



        <HttpPost()> _

        Public Function SendMicrosoftRaw(ByVal userId As String, ByVal message As String) As ActionResult

            If String.IsNullOrWhiteSpace(message) Then

                Return Me.Json("The notification message cannot be null, empty nor white space.", JsonRequestBehavior.AllowGet)

            End If



            Dim resultList = New List(Of MessageSendResultLight)()

            Dim uris = Me.pushUserEndpointsRepository.GetPushUsersByName(userId).Select(Function(u) u.ChannelUri)

            Dim raw = New RawPushNotificationMessage With {.SendPriority = MessageSendPriority.High, .RawData = Encoding.UTF8.GetBytes(message)}



            For Each uri In uris

                resultList.Add(raw.SendAndHandleErrors(New Uri(uri)))

            Next uri



            Return Me.Json(resultList, JsonRequestBehavior.AllowGet)

        End Function



        <HttpPost()> _

        Public Function SendAppleMessage(ByVal deviceId As String, ByVal message As String) As ActionResult

            If String.IsNullOrWhiteSpace(deviceId) Then

                Return Me.Json("The deviceId cannot be null, empty nor white space.", JsonRequestBehavior.AllowGet)

            End If



            If String.IsNullOrWhiteSpace(message) Then

                Return Me.Json("The notification message cannot be null, empty nor white space.", JsonRequestBehavior.AllowGet)

            End If



            ' Get the Apple Notification Service settings.

            Dim thumprint = ConfigReader.GetConfigValue("AppleNotificationService.Thumbprint")

            Dim host = ConfigReader.GetConfigValue("AppleNotificationService.Host")

            Dim port = 0

            If Not Integer.TryParse(ConfigReader.GetConfigValue("AppleNotificationService.Port"), NumberStyles.Integer, CultureInfo.InvariantCulture, port) Then

                port = DefaultPort

            End If



            Dim certCollection As X509Certificate2Collection = Nothing

            Try

                ' Load the Apple Notification Service certificate from the store.

                Dim clientCert = CertificateUtil.GetCertificate(StoreName.My, StoreLocation.LocalMachine, thumprint)

                certCollection = New X509Certificate2Collection(clientCert)

            Catch exception As Exception

                Dim errorMessage = String.Format(CultureInfo.InvariantCulture, "Error getting the X509 certificate from the store: {0}", exception.Message)

                Return Me.Json(errorMessage, JsonRequestBehavior.AllowGet)

            End Try



            Dim client As TcpClient = Nothing

            Try

                ' Open connection and connect.

                client = New TcpClient(host, port)

                Dim sslStream = New SslStream(client.GetStream(), False)



                sslStream.AuthenticateAsClient(host, certCollection, SslProtocols.Tls, False)



                Dim array() As Byte = Nothing

                Using memoryStream = New MemoryStream()

                    Dim writer = New BinaryWriter(memoryStream)



                    ' Construct the message.

                    writer.Write(CByte(0)) ' Command

                    writer.Write(CByte(0)) ' First byte of device ID length

                    writer.Write(CByte(32)) ' Device id length



                    ' Convert to hex and write to message.

                    Dim deviceToken(deviceId.Length \ 2 - 1) As Byte

                    For i As Integer = 0 To deviceToken.Length - 1

                        deviceToken(i) = Byte.Parse(deviceId.Substring(i * 2, 2), NumberStyles.HexNumber)

                    Next i



                    writer.Write(deviceToken)



                    ' Construct payload within JSON message framework.

                    Dim payload = String.Format(CultureInfo.InvariantCulture, "{{""aps"":{{""alert"":""{0}"",""badge"":1}}}}", message)



                    ' Write payload data.

                    writer.Write(CByte(0)) ' First byte of payload length

                    writer.Write(CByte(payload.Length)) ' Actual payload length

                    Dim b1() As Byte = Encoding.UTF8.GetBytes(payload)

                    writer.Write(b1)

                    writer.Flush()



                    array = memoryStream.ToArray()

                End Using



                ' Send across the wire.

                sslStream.Write(array)

                sslStream.Flush()

            Catch exception As AuthenticationException

                Dim errorMessage = String.Format(CultureInfo.InvariantCulture, "Error authenticating against APN: {0}", exception.Message)

                Return Me.Json(errorMessage, JsonRequestBehavior.AllowGet)

            Catch exception As Exception

                Dim errorMessage = String.Format(CultureInfo.InvariantCulture, "There was an error sending the notification message: {0}", exception.Message)

                Return Me.Json(errorMessage, JsonRequestBehavior.AllowGet)

            Finally

                ' Close the client connection.

                client.Close()

            End Try



            ' Success.

            Return Me.Json("Success", JsonRequestBehavior.AllowGet)

        End Function



        Private Shared Function GetStorageAccountFromConfigurationSetting() As CloudStorageAccount

            Dim account As CloudStorageAccount = Nothing

            Try

                account = CloudStorageAccount.FromConfigurationSetting("DataConnectionString")

            Catch e1 As InvalidOperationException

                account = Nothing

            End Try



            Return account

        End Function



        Private Sub QueueMessage(ByVal pushUser As PushUserEndpoint, ByVal message As String)

            Dim queueName = GetQueueName(pushUser.PartitionKey, pushUser.RowKey, pushUser.UserId)

            Dim queue = Me.cloudQueueClient.GetQueueReference(queueName)



            queue.CreateIfNotExist()

            queue.AddMessage(New CloudQueueMessage(message))

        End Sub



        Private Shared Function GetQueueName(ByVal applicationId As String, ByVal deviceId As String, ByVal userId As String) As String

            Dim uniqueName = String.Concat(applicationId, deviceId, userId)



            Return String.Concat("notification", uniqueName.GetHashCode())

        End Function

    End Class

End Namespace