initial commit

Core/Application/Features/DashboardManager/Queries/GetCampaignByStatus.cs

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+using Application.Common.CQS.Queries;
+using Application.Common.Extensions;
+using Domain.Entities;
+using Domain.Enums;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+
+namespace Application.Features.DashboardManager.Queries;
+
+public class GetCampaignByStatusResult
+{
+    public List<AccummulationChartItem>? Data { get; init; }
+}
+
+public class GetCampaignByStatusRequest : IRequest<GetCampaignByStatusResult>
+{
+}
+
+public class GetCampaignByStatusHandler : IRequestHandler<GetCampaignByStatusRequest, GetCampaignByStatusResult>
+{
+    private readonly IQueryContext _context;
+
+    public GetCampaignByStatusHandler(IQueryContext context)
+    {
+        _context = context;
+    }
+
+    public async Task<GetCampaignByStatusResult> Handle(GetCampaignByStatusRequest request, CancellationToken cancellationToken)
+    {
+        var groupedCampaigns = await _context.Set<Campaign>()
+            .GroupBy(c => c.Status)
+            .Select(g => new { Status = g.Key, Count = g.Count() })
+            .ToListAsync(cancellationToken);
+
+        var result = groupedCampaigns.Select(g => new AccummulationChartItem
+        {
+            X = g.Status.HasValue ? ((CampaignStatus)g.Status).ToFriendlyName() : string.Empty,
+            Y = (double)g.Count,
+            Text = g.Status.HasValue
+                ? $"{((CampaignStatus)g.Status).ToFriendlyName()} ({g.Count})"
+                : $"Unknown ({g.Count})"
+        }).ToList();
+
+        return new GetCampaignByStatusResult { Data = result };
+    }
+}