feat(risk-control): add database migrations and seed data

Fengling.RiskControl.Infrastructure/DesignTimeRiskControlDbContextFactory.cs

@@ -0,0 +1,23 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+using Microsoft.Extensions.Logging;
+
+namespace Fengling.RiskControl.Infrastructure;
+
+public class DesignTimeRiskControlDbContextFactory : IDesignTimeDbContextFactory<RiskControlDbContext>
+{
+    private readonly ILoggerFactory _loggerFactory;
+
+    public DesignTimeRiskControlDbContextFactory(ILoggerFactory loggerFactory)
+    {
+        _loggerFactory = loggerFactory;
+    }
+
+    public RiskControlDbContext CreateDbContext(string[] args)
+    {
+        var optionsBuilder = new DbContextOptionsBuilder<RiskControlDbContext>();
+        optionsBuilder.UseNpgsql("Host=localhost;Database=RiskControl;Username=postgres;Password=postgres");
+        optionsBuilder.UseLoggerFactory(_loggerFactory);
+        return new RiskControlDbContext(optionsBuilder.Options);
+    }
+}

Fengling.RiskControl.Infrastructure/RiskControlDbContext.cs

@@ -4,6 +4,7 @@ using Fengling.RiskControl.Domain.Aggregates.RiskRules;
 using Fengling.RiskControl.Domain.Aggregates.RiskScores;
 using Fengling.RiskControl.Domain.Aggregates.RiskAlerts;
 using Fengling.RiskControl.Domain.Aggregates.LotteryActivities;
+using Fengling.RiskControl.Infrastructure.SeedData;
 
 namespace Fengling.RiskControl.Infrastructure;
 
@@ -61,4 +62,13 @@ public class RiskControlDbContext : DbContext
             builder.Property(l => l.DeviceId).HasMaxLength(100);
         });
     }
+
+    public void SeedData()
+    {
+        if (!RiskRules.Any())
+        {
+            RiskRules.AddRange(RiskControlSeedData.GetDefaultRules());
+            SaveChanges();
+        }
+    }
 }

Fengling.RiskControl.Infrastructure/SeedData/RiskControlSeedData.cs

@@ -0,0 +1,57 @@
+using Fengling.RiskControl.Domain.Aggregates.RiskRules;
+
+namespace Fengling.RiskControl.Infrastructure.SeedData;
+
+public static class RiskControlSeedData
+{
+    public static IEnumerable<RiskRule> GetDefaultRules()
+    {
+        yield return RiskRule.Create(
+            "高频抽奖限制",
+            "限制单日抽奖次数，防止沉迷",
+            RiskRuleType.FrequencyLimit,
+            RiskRuleAction.Block,
+            """{"maxCount": 10, "windowMinutes": 1440, "points": 30}""",
+            priority: 10);
+
+        yield return RiskRule.Create(
+            "单次大额抽奖限制",
+            "单次抽奖投入不能超过1000积分",
+            RiskRuleType.AmountLimit,
+            RiskRuleAction.Block,
+            """{"maxAmount": 1000, "points": 40}""",
+            priority: 9);
+
+        yield return RiskRule.Create(
+            "设备异常检测",
+            "同一设备频繁切换账号",
+            RiskRuleType.DeviceFingerprint,
+            RiskRuleAction.RequireVerification,
+            """{"maxAccountsPerDevice": 3, "windowMinutes": 60, "points": 50}""",
+            priority: 8);
+
+        yield return RiskRule.Create(
+            "IP地址异常",
+            "同一IP短时间内大量请求",
+            RiskRuleType.VelocityCheck,
+            RiskRuleAction.RateLimit,
+            """{"maxRequests": 100, "windowMinutes": 1, "points": 20}""",
+            priority: 7);
+
+        yield return RiskRule.Create(
+            "行为模式异常",
+            "检测非正常用户行为模式",
+            RiskRuleType.BehaviorPattern,
+            RiskRuleAction.FlagForReview,
+            """{"patterns": ["rapid_clicks", "pattern_sequences"]}""",
+            priority: 5);
+
+        yield return RiskRule.Create(
+            "VIP会员白名单",
+            "VIP会员享受较低风控等级",
+            RiskRuleType.Whitelist,
+            RiskRuleAction.Allow,
+            """{"vipLevels": [3, 4, 5]}""",
+            priority: 100);
+    }
+}