feat(push): add service-owned firebase channels and delivery

Add push contracts, provider delivery and channel diagnostics. Link email channels to services and document migration and validation.

Ref: IT-1074

HrynCo.NotificationService.Services/EmailChannels/Create/CreateEmailChannelCommand.cs

@@ -5,7 +5,7 @@ using HrynCo.NotificationService.Services.Core;
 namespace HrynCo.NotificationService.Services.EmailChannels.Create;
 
 public sealed record CreateEmailChannelCommand(
-    string ServiceName,
+    Guid ServiceId,
     int Priority,
     EmailChannelType ChannelType,
     EmailChannelSettings Settings,

HrynCo.NotificationService.Services/EmailChannels/Create/CreateEmailChannelHandler.cs

@@ -1,4 +1,3 @@
-using HrynCo.DAL.Abstract;
 using HrynCo.NotificationService.DAL.Abstract.Providers;
 using HrynCo.NotificationService.DAL.Abstract.Repositories;
 using HrynCo.NotificationService.Services.Core;
@@ -11,21 +10,27 @@ internal sealed class CreateEmailChannelHandler
     : RequestHandler<CreateEmailChannelCommand, ServiceResult<Guid>>
 {
     private readonly IEmailChannelRepository _channels;
+    private readonly INotificationServiceRepository _services;
 
     public CreateEmailChannelHandler(
         IContextualSerilogLogger<CreateEmailChannelCommand> logger,
-        IEmailChannelRepository channels)
+        IEmailChannelRepository channels,
+        INotificationServiceRepository services)
         : base(logger)
     {
         _channels = channels;
+        _services = services;
     }
 
     protected override async Task<ServiceResult<Guid>> DoOnHandle(
         CreateEmailChannelCommand request, CancellationToken cancellationToken)
     {
+        if (request.ServiceId == Guid.Empty || await _services.GetAsync(request.ServiceId, cancellationToken) is null)
+            return Failure<Guid>("Select an existing service.", ServiceErrorCode.InvalidRequest);
+
         var channel = new EmailChannel
         {
-            ServiceName = request.ServiceName,
+            ServiceId = request.ServiceId,
             Priority = request.Priority,
             EmailChannelType = request.ChannelType,
             Settings = request.Settings,

HrynCo.NotificationService.Services/EmailChannels/GetByService/GetEmailChannelsHandler.cs

@@ -10,19 +10,25 @@ internal sealed class GetEmailChannelsHandler
     : RequestHandler<GetEmailChannelsQuery, ServiceResult<IReadOnlyList<EmailChannel>>>
 {
     private readonly IEmailChannelRepository _channels;
+    private readonly INotificationServiceRepository _services;
 
     public GetEmailChannelsHandler(
         IContextualSerilogLogger<GetEmailChannelsQuery> logger,
-        IEmailChannelRepository channels)
+        IEmailChannelRepository channels,
+        INotificationServiceRepository services)
         : base(logger)
     {
         _channels = channels;
+        _services = services;
     }
 
     protected override async Task<ServiceResult<IReadOnlyList<EmailChannel>>> DoOnHandle(
         GetEmailChannelsQuery request, CancellationToken cancellationToken)
     {
-        var channels = await _channels.GetByServiceAsync(request.ServiceName, cancellationToken);
+        var service = await _services.GetByNameAsync(request.ServiceName, cancellationToken);
+        if (service is null)
+            return Success<IReadOnlyList<EmailChannel>>([]);
+        var channels = await _channels.GetByServiceAsync(service.Id, cancellationToken);
         return Success(channels);
     }
 }

HrynCo.NotificationService.Services/EmailChannels/Update/UpdateEmailChannelCommand.cs

@@ -7,6 +7,7 @@ namespace HrynCo.NotificationService.Services.EmailChannels.Update;
 
 public sealed record UpdateEmailChannelCommand(
     Guid Id,
+    Guid ServiceId,
     int Priority,
     EmailChannelSettings Settings,
     int? DailyLimit,

HrynCo.NotificationService.Services/EmailChannels/Update/UpdateEmailChannelHandler.cs

@@ -1,4 +1,3 @@
-using HrynCo.DAL.Abstract;
 using HrynCo.NotificationService.DAL.Abstract.Repositories;
 using HrynCo.NotificationService.Services.Core;
 using HrynCo.NotificationService.Services.Logging;
@@ -10,13 +9,16 @@ internal sealed class UpdateEmailChannelHandler
     : RequestHandler<UpdateEmailChannelCommand, ServiceResult<Unit>>
 {
     private readonly IEmailChannelRepository _channels;
+    private readonly INotificationServiceRepository _services;
 
     public UpdateEmailChannelHandler(
         IContextualSerilogLogger<UpdateEmailChannelCommand> logger,
-        IEmailChannelRepository channels)
+        IEmailChannelRepository channels,
+        INotificationServiceRepository services)
         : base(logger)
     {
         _channels = channels;
+        _services = services;
     }
 
     protected override async Task<ServiceResult<Unit>> DoOnHandle(
@@ -27,6 +29,10 @@ internal sealed class UpdateEmailChannelHandler
         if (channel is null)
             return Failure<Unit>("Email channel not found.", ServiceErrorCode.NotFound);
 
+        if (request.ServiceId == Guid.Empty || await _services.GetAsync(request.ServiceId, cancellationToken) is null)
+            return Failure<Unit>("Select an existing service.", ServiceErrorCode.InvalidRequest);
+
+        channel.ServiceId = request.ServiceId;
         channel.Priority = request.Priority;
         channel.Settings = request.Settings;
         channel.DailyLimit = request.DailyLimit;