Initial commit: SWP.Core enterprise framework with multi-tenant architecture, configuration management, security, telemetry and comprehensive test suite

Database/Core/UserService.cs

@@ -0,0 +1,79 @@
+using Insight.Database;
+using PlanTempus.Core;
+using PlanTempus.Core.Entities.Users;
+using System.Data;
+
+namespace PlanTempus.Database.Core
+{
+    public class UserService
+    {
+        public record UserCreateCommand(string CorrelationId, string Email, string Password);
+
+        private readonly IDbConnection _db;
+
+        public UserService(IDbConnection db)
+        {
+            _db = db;
+        }
+
+        public async Task CreateUser(UserCreateCommand command)
+        {
+            var user = new User
+            {
+                Email = command.Email,
+                PasswordHash = new SecureTokenizer().TokenizeText(command.Password),
+                SecurityStamp = Guid.NewGuid().ToString(),
+                EmailConfirmed = false,
+                CreatedDate = DateTime.UtcNow
+            };
+
+            var userId = await _db.ExecuteScalarAsync<int>(@$"
+                INSERT INTO users (email, password_hash, security_stamp, email_confirmed, created_at)
+                VALUES (@Email, @PasswordHash, @SecurityStamp, @EmailConfirmed, @CreatedDate)
+                RETURNING id", user);
+        }
+
+        public async Task CreateOrganization(int userId, string organizationConnectionString)
+        {
+            var schema = "dev";
+
+
+            using var transaction = _db.OpenWithTransaction();
+            try
+            {
+                // Create organization
+                var organization = new Organization
+                {
+                    ConnectionString = organizationConnectionString,
+                    CreatedDate = DateTime.UtcNow,
+                    CreatedBy = userId,
+                    IsActive = true
+                };
+
+                var organizationId = await _db.ExecuteScalarAsync<int>(@$"
+                INSERT INTO {schema}.organizations (connection_string, created_date, is_active)
+                VALUES (@ConnectionString, @CreatedDate, @IsActive)
+                RETURNING id", organization);
+
+                // Link user to organization
+                var userOrganization = new UserOrganization
+                {
+                    UserId = userId,
+                    OrganizationId = organizationId,
+                    CreatedDate = DateTime.UtcNow
+                };
+
+                await _db.ExecuteAsync(@$"
+                INSERT INTO {schema}.user_organizations (user_id, organization_id, created_date)
+                VALUES (@UserId, @OrganizationId, @CreatedDate)", userOrganization);
+
+                transaction.Commit();
+            }
+            catch
+            {
+                transaction.Rollback();
+                throw;
+            }
+        }
+    }
+}