Load purchasing dashboard live EKKO data
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namespace TrafagSalesExporter.Services;
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public interface IPurchasingDashboardService
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{
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Task<PurchasingDashboardLiveState> LoadAsync(CancellationToken cancellationToken = default);
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}
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public sealed class PurchasingDashboardLiveState
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{
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public bool SapReachable { get; set; }
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public bool EkkoLoaded { get; set; }
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public bool EkpoLoaded { get; set; }
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public bool EketLoaded { get; set; }
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public int PurchaseOrderCount { get; set; }
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public int SupplierCount { get; set; }
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public DateTime? LatestOrderDate { get; set; }
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public int PositionSampleCount { get; set; }
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public int ScheduleSampleCount { get; set; }
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public string Message { get; set; } = string.Empty;
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}
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@@ -0,0 +1,163 @@
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using System.Globalization;
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using System.Net.Http.Headers;
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using System.Text;
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using System.Text.Json;
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using Microsoft.EntityFrameworkCore;
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using TrafagSalesExporter.Data;
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namespace TrafagSalesExporter.Services;
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public sealed class PurchasingDashboardService : IPurchasingDashboardService
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{
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private readonly IDbContextFactory<AppDbContext> _dbFactory;
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public PurchasingDashboardService(IDbContextFactory<AppDbContext> dbFactory)
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{
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_dbFactory = dbFactory;
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}
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public async Task<PurchasingDashboardLiveState> LoadAsync(CancellationToken cancellationToken = default)
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{
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var state = new PurchasingDashboardLiveState();
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try
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{
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await using var db = await _dbFactory.CreateDbContextAsync(cancellationToken);
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var sap = await db.SourceSystemDefinitions.AsNoTracking().FirstOrDefaultAsync(x => x.Code == "SAP", cancellationToken);
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var site = await db.Sites.AsNoTracking().FirstOrDefaultAsync(x => x.TSC == PurchasingDataSourcePageService.PurchasingTsc, cancellationToken);
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if (sap is null || site is null)
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{
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state.Message = "SAP Einkaufsquelle ist noch nicht konfiguriert.";
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return state;
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}
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var serviceUrl = string.IsNullOrWhiteSpace(site.SapServiceUrl) ? sap.CentralServiceUrl : site.SapServiceUrl;
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var username = string.IsNullOrWhiteSpace(site.UsernameOverride) ? sap.CentralUsername : site.UsernameOverride;
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var password = string.IsNullOrWhiteSpace(site.PasswordOverride) ? sap.CentralPassword : site.PasswordOverride;
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if (string.IsNullOrWhiteSpace(serviceUrl) || string.IsNullOrWhiteSpace(username) || string.IsNullOrWhiteSpace(password))
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{
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state.Message = "SAP URL oder Zugangsdaten fehlen.";
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return state;
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}
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using var client = CreateClient(username, password);
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var baseUrl = serviceUrl.TrimEnd('/') + "/";
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var currentYear = DateTime.Today.Year;
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var ekkoFilter = Uri.EscapeDataString($"Bedat ge '{currentYear}-01-01'");
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var ekkoCount = await ReadCountAsync(
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client,
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$"{baseUrl}EKKOSet/$count?$filter={ekkoFilter}",
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cancellationToken);
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var ekkoRows = await ReadRowsAsync(
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client,
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$"{baseUrl}EKKOSet?$format=json&$top=1000&$filter={ekkoFilter}&$select=Ebeln,Bedat,Lifnr",
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cancellationToken);
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state.SapReachable = true;
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state.EkkoLoaded = ekkoRows.Count > 0;
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state.PurchaseOrderCount = ekkoCount ?? ekkoRows.Count;
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state.SupplierCount = ekkoRows
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.Select(row => GetText(row, "Lifnr"))
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.Where(value => !string.IsNullOrWhiteSpace(value))
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.Distinct(StringComparer.OrdinalIgnoreCase)
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.Count();
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state.LatestOrderDate = ekkoRows
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.Select(row => TryParseSapDate(GetText(row, "Bedat")))
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.Where(date => date.HasValue)
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.Select(date => date!.Value)
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.OrderByDescending(date => date)
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.Cast<DateTime?>()
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.FirstOrDefault();
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var firstEbeln = ekkoRows.Select(row => GetText(row, "Ebeln")).FirstOrDefault(value => !string.IsNullOrWhiteSpace(value));
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if (!string.IsNullOrWhiteSpace(firstEbeln))
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{
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var ekpoRows = await ReadRowsAsync(
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client,
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$"{baseUrl}EKPOSet?$format=json&$top=50&$filter={Uri.EscapeDataString($"Ebeln eq '{firstEbeln}'")}",
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cancellationToken);
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state.PositionSampleCount = ekpoRows.Count;
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state.EkpoLoaded = ekpoRows.Count > 0;
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var eketRows = await ReadRowsAsync(
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client,
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$"{baseUrl}eketSet?$format=json&$top=50&$filter={Uri.EscapeDataString($"Ebeln eq '{firstEbeln}'")}",
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cancellationToken);
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state.ScheduleSampleCount = eketRows.Count;
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state.EketLoaded = eketRows.Count > 0;
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}
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state.Message = state.EkpoLoaded
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? "SAP Einkaufsdaten geladen."
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: "EKKO ist live geladen; EKPO/EKET liefern aktuell noch keine Positionsdaten.";
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}
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catch (Exception ex)
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{
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state.Message = $"SAP Einkauf konnte nicht geladen werden: {ex.Message}";
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}
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return state;
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}
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private static HttpClient CreateClient(string username, string password)
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{
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var client = new HttpClient { Timeout = TimeSpan.FromSeconds(45) };
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var token = Convert.ToBase64String(Encoding.UTF8.GetBytes($"{username}:{password}"));
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client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", token);
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client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
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return client;
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}
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private static async Task<List<Dictionary<string, object?>>> ReadRowsAsync(HttpClient client, string url, CancellationToken cancellationToken)
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{
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using var response = await client.GetAsync(url, cancellationToken);
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if (!response.IsSuccessStatusCode)
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return [];
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var json = await response.Content.ReadAsStringAsync(cancellationToken);
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using var document = JsonDocument.Parse(json);
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if (!document.RootElement.TryGetProperty("d", out var d) ||
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!d.TryGetProperty("results", out var results) ||
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results.ValueKind != JsonValueKind.Array)
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return [];
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return results.EnumerateArray()
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.Select(item => item.EnumerateObject()
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.Where(property => property.Name != "__metadata")
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.ToDictionary(property => property.Name, property => ConvertJsonValue(property.Value), StringComparer.OrdinalIgnoreCase))
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.ToList();
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}
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private static async Task<int?> ReadCountAsync(HttpClient client, string url, CancellationToken cancellationToken)
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{
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using var response = await client.GetAsync(url, cancellationToken);
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if (!response.IsSuccessStatusCode)
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return null;
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var text = await response.Content.ReadAsStringAsync(cancellationToken);
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return int.TryParse(text.Trim(), NumberStyles.Integer, CultureInfo.InvariantCulture, out var value) ? value : null;
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}
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private static object? ConvertJsonValue(JsonElement value) => value.ValueKind switch
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{
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JsonValueKind.String => value.GetString(),
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JsonValueKind.Number when value.TryGetDecimal(out var number) => number,
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JsonValueKind.True => true,
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JsonValueKind.False => false,
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JsonValueKind.Null => null,
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_ => value.ToString()
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};
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private static string GetText(Dictionary<string, object?> row, string key)
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=> row.TryGetValue(key, out var value) ? Convert.ToString(value, CultureInfo.InvariantCulture) ?? string.Empty : string.Empty;
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private static DateTime? TryParseSapDate(string value)
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{
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if (DateTime.TryParse(value, CultureInfo.InvariantCulture, DateTimeStyles.AssumeLocal, out var parsed))
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return parsed;
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return DateTime.TryParseExact(value, "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None, out parsed)
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? parsed
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: null;
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}
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}
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