Initial import into Gitea

Registration/Mock/MockDataService.cs

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+using Registration.Data;
+using System.Collections.Concurrent;
+using Microsoft.Extensions.Logging;
+
+namespace Registration.Mock;
+
+/// <summary>
+/// In-memory mock registration data for development.
+/// Persists across requests within a single Function host lifecycle.
+/// State resets on cold start (by design — it's mock data).
+///
+/// Swap to SqlDataService in Program.cs when dbRegistration is ready.
+/// </summary>
+public class MockDataService : IRegistrationDataService
+{
+    private readonly ConcurrentDictionary<string, Applicant> _store;
+    private readonly ILogger<MockDataService> _log;
+
+    public MockDataService(ILogger<MockDataService> log)
+    {
+        _log = log;
+        _store = new ConcurrentDictionary<string, Applicant>(SeedData());
+        _log.LogInformation("[Mock] Initialized with {Count} applicants", _store.Count);
+    }
+
+    public Task<RegistrationListResult> GetPendingAsync(CancellationToken ct)
+    {
+        var pending = _store.Values
+            .Where(a => a.Status == "Pending")
+            .OrderBy(a => a.RegisteredUtc)
+            .ToList();
+
+        return Task.FromResult(new RegistrationListResult
+        {
+            Ok = true,
+            Applicants = pending,
+            TotalCount = pending.Count
+        });
+    }
+
+    public Task<Applicant?> GetByIdAsync(string registrationId, CancellationToken ct)
+    {
+        _store.TryGetValue(registrationId, out var applicant);
+        return Task.FromResult(applicant);
+    }
+
+    public Task<RegistrationResult> RegisterAsync(RegisterRequest request, CancellationToken ct)
+    {
+        if (string.IsNullOrWhiteSpace(request.BusinessName))
+            return Task.FromResult(new RegistrationResult { Ok = false, Error = "Business name is required" });
+
+        // Check for duplicate business name
+        if (_store.Values.Any(a => string.Equals(a.BusinessName, request.BusinessName, StringComparison.OrdinalIgnoreCase)
+            && a.Status != "Rejected"))
+            return Task.FromResult(new RegistrationResult { Ok = false, Error = "A registration with this name already exists" });
+
+        var id = Guid.NewGuid().ToString("D");
+        var applicant = new Applicant
+        {
+            RegistrationId = id,
+            BusinessName = request.BusinessName!.Trim(),
+            WebsiteUrl = request.WebsiteUrl,
+            BusinessCategory = request.BusinessCategory,
+            BusinessDescription = request.BusinessDescription,
+            ContactName = request.ContactName,
+            ContactEmail = request.ContactEmail,
+            ContactPhone = request.ContactPhone,
+            EntraSubjectId = request.EntraSubjectId,
+            Status = "Pending",
+            PaymentVerified = false,
+            RegisteredUtc = DateTime.UtcNow
+        };
+
+        _store[id] = applicant;
+        _log.LogInformation("[Mock] New registration: {Name} ({Id})", applicant.BusinessName, id);
+
+        return Task.FromResult(new RegistrationResult { Ok = true, RegistrationId = id });
+    }
+
+    public Task<RegistrationResult> RejectAsync(string registrationId, string? reason, string? rejectedBy, CancellationToken ct)
+    {
+        if (!_store.TryGetValue(registrationId, out var applicant))
+            return Task.FromResult(new RegistrationResult { Ok = false, Error = "Registration not found" });
+
+        if (applicant.Status != "Pending")
+            return Task.FromResult(new RegistrationResult { Ok = false, Error = $"Cannot reject — status is {applicant.Status}" });
+
+        applicant.Status = "Rejected";
+        applicant.RejectionReason = reason;
+        applicant.ReviewedBy = rejectedBy;
+        applicant.ReviewedUtc = DateTime.UtcNow;
+
+        _log.LogInformation("[Mock] Rejected: {Name} ({Id}) reason={Reason}", applicant.BusinessName, registrationId, reason);
+
+        return Task.FromResult(new RegistrationResult { Ok = true, RegistrationId = registrationId });
+    }
+
+    public Task<RegistrationResult> CompleteAsync(string registrationId, string? platformClientId, CancellationToken ct)
+    {
+        if (!_store.TryGetValue(registrationId, out var applicant))
+            return Task.FromResult(new RegistrationResult { Ok = false, Error = "Registration not found" });
+
+        if (applicant.Status != "Pending")
+            return Task.FromResult(new RegistrationResult { Ok = false, Error = $"Cannot complete — status is {applicant.Status}" });
+
+        applicant.Status = "Approved";
+        applicant.PlatformClientId = platformClientId;
+        applicant.ReviewedUtc = DateTime.UtcNow;
+
+        _log.LogInformation("[Mock] Approved: {Name} ({Id}) → platform client {PlatformId}",
+            applicant.BusinessName, registrationId, platformClientId);
+
+        return Task.FromResult(new RegistrationResult { Ok = true, RegistrationId = registrationId });
+    }
+
+    // ── Seed Data ───────────────────────────────────
+
+    private static IEnumerable<KeyValuePair<string, Applicant>> SeedData()
+    {
+        var applicants = new[]
+        {
+            new Applicant
+            {
+                RegistrationId = "reg-001",
+                BusinessName = "Bella's Boutique",
+                WebsiteUrl = "https://bellasboutique.com",
+                BusinessCategory = "retail",
+                BusinessDescription = "Women's fashion and accessories boutique in Orange County. Looking to expand online presence through targeted social and search ads.",
+                ContactName = "Bella Rodriguez",
+                ContactEmail = "bella@bellasboutique.com",
+                ContactPhone = "(714) 555-0142",
+                EntraSubjectId = "entra-mock-bella-001",
+                Status = "Pending",
+                PaymentVerified = true,
+                RegisteredUtc = DateTime.UtcNow.AddDays(-3)
+            },
+            new Applicant
+            {
+                RegistrationId = "reg-002",
+                BusinessName = "Pacific Coast Plumbing",
+                WebsiteUrl = "https://pacificcoastplumbing.com",
+                BusinessCategory = "home_services",
+                BusinessDescription = "Full-service plumbing company serving LA and OC. Need help with Google Local Services ads and Maps visibility.",
+                ContactName = "Mike Chen",
+                ContactEmail = "mike@pcplumbing.com",
+                ContactPhone = "(562) 555-0198",
+                EntraSubjectId = "entra-mock-mike-002",
+                Status = "Pending",
+                PaymentVerified = true,
+                RegisteredUtc = DateTime.UtcNow.AddDays(-1)
+            },
+            new Applicant
+            {
+                RegistrationId = "reg-003",
+                BusinessName = "Sunrise Dental Group",
+                WebsiteUrl = "https://sunrisedental.care",
+                BusinessCategory = "healthcare",
+                BusinessDescription = "Multi-location dental practice. Interested in running awareness campaigns for new patient acquisition across Google and Meta.",
+                ContactName = "Dr. Sarah Kim",
+                ContactEmail = "sarah@sunrisedental.care",
+                ContactPhone = "(949) 555-0267",
+                EntraSubjectId = "entra-mock-sarah-003",
+                Status = "Pending",
+                PaymentVerified = false,
+                RegisteredUtc = DateTime.UtcNow.AddHours(-6)
+            },
+            new Applicant
+            {
+                RegistrationId = "reg-004",
+                BusinessName = "FreshBite Meal Prep",
+                WebsiteUrl = "https://freshbitemealprep.com",
+                BusinessCategory = "food_beverage",
+                BusinessDescription = "Healthy meal prep delivery service. $2k/month budget for Instagram and TikTok ads targeting health-conscious millennials.",
+                ContactName = "Jordan Williams",
+                ContactEmail = "jordan@freshbitemealprep.com",
+                ContactPhone = "(310) 555-0334",
+                EntraSubjectId = "entra-mock-jordan-004",
+                Status = "Pending",
+                PaymentVerified = true,
+                RegisteredUtc = DateTime.UtcNow.AddHours(-2)
+            },
+        };
+
+        return applicants.Select(a => new KeyValuePair<string, Applicant>(a.RegistrationId, a));
+    }
+}