Add configurable finance rules and dashboard basis indicators

TrafagSalesExporter/Services/FinanceRulesPageService.cs

@@ -0,0 +1,70 @@
+using Microsoft.EntityFrameworkCore;
+using TrafagSalesExporter.Data;
+using TrafagSalesExporter.Models;
+
+namespace TrafagSalesExporter.Services;
+
+public interface IFinanceRulesPageService
+{
+    Task<List<FinanceRule>> LoadAsync();
+    Task<List<FinanceRule>> SaveAllAsync(List<FinanceRule> rules);
+}
+
+public sealed class FinanceRulesPageService : IFinanceRulesPageService
+{
+    private readonly IDbContextFactory<AppDbContext> _dbFactory;
+
+    public FinanceRulesPageService(IDbContextFactory<AppDbContext> dbFactory)
+    {
+        _dbFactory = dbFactory;
+    }
+
+    public async Task<List<FinanceRule>> LoadAsync()
+    {
+        await using var db = await _dbFactory.CreateDbContextAsync();
+        var rules = await db.FinanceRules
+            .AsNoTracking()
+            .OrderBy(rule => rule.SortOrder)
+            .ThenBy(rule => rule.Id)
+            .ToListAsync();
+
+        if (rules.Count > 0)
+            return rules;
+
+        return FinanceRuleEngine.CreateDefaultRules()
+            .Select(CloneRule)
+            .ToList();
+    }
+
+    public async Task<List<FinanceRule>> SaveAllAsync(List<FinanceRule> rules)
+    {
+        await using var db = await _dbFactory.CreateDbContextAsync();
+        db.FinanceRules.RemoveRange(db.FinanceRules);
+        db.FinanceRules.AddRange(rules
+            .OrderBy(rule => rule.SortOrder)
+            .ThenBy(rule => rule.Id)
+            .Select(CloneRule));
+        await db.SaveChangesAsync();
+
+        return await db.FinanceRules
+            .AsNoTracking()
+            .OrderBy(rule => rule.SortOrder)
+            .ThenBy(rule => rule.Id)
+            .ToListAsync();
+    }
+
+    private static FinanceRule CloneRule(FinanceRule rule)
+        => new()
+        {
+            ScopeKey = rule.ScopeKey.Trim().ToUpperInvariant(),
+            Year = rule.Year,
+            RuleType = string.IsNullOrWhiteSpace(rule.RuleType) ? FinanceRuleTypes.Exclude : rule.RuleType,
+            FieldName = rule.FieldName ?? string.Empty,
+            MatchType = string.IsNullOrWhiteSpace(rule.MatchType) ? FinanceRuleMatchTypes.Contains : rule.MatchType,
+            MatchValue = rule.MatchValue ?? string.Empty,
+            NumericValue = rule.NumericValue,
+            Notes = rule.Notes ?? string.Empty,
+            SortOrder = rule.SortOrder,
+            IsActive = rule.IsActive
+        };
+}