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AMREZ.EOP.Infrastructures/Tenancy/TenantMap.cs

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+using System.Collections.Concurrent;
+using AMREZ.EOP.Abstractions.Applications.Tenancy;
+using AMREZ.EOP.Domain.Shared.Tenancy;
+
+namespace AMREZ.EOP.Infrastructures.Tenancy;
+
+/// <summary>
+/// ศูนย์รวม mapping แบบไดนามิก:
+/// - Tenants: slug/key -> TenantContext
+/// - DomainToTenant: custom-domain -> tenantKey
+/// - BaseDomains: ชุดโดเมนแพลตฟอร์มที่รองรับรูปแบบ *.basedomain (รองรับหลายอันได้)
+/// คุณสามารถเติม/แก้ไขระหว่างรันงานผ่าน Admin API หรือ job reload จาก DB ได้เลย
+/// </summary>
+public sealed class TenantMap
+{
+    private readonly ConcurrentDictionary<string, TenantContext> _tenants = new(StringComparer.OrdinalIgnoreCase);
+    private readonly ConcurrentDictionary<string, string> _domainToTenant = new(StringComparer.OrdinalIgnoreCase);
+    private readonly ConcurrentDictionary<string, byte> _baseDomains = new(StringComparer.OrdinalIgnoreCase);
+
+    // ====== Query ======
+    public bool TryGetBySlug(string slug, out ITenantContext ctx)
+    {
+        if (_tenants.TryGetValue(slug, out var t))
+        {
+            ctx = t; return true;
+        }
+        ctx = null!; return false;
+    }
+
+    public bool TryGetByDomain(string domain, out ITenantContext ctx)
+    {
+        if (_domainToTenant.TryGetValue(domain, out var key) && _tenants.TryGetValue(key, out var t))
+        { ctx = t; return true; }
+        ctx = null!; return false;
+    }
+
+    public bool TryGetBaseDomainFor(string host, out string? baseDomain)
+    {
+        foreach (var kv in _baseDomains.Keys)
+        {
+            var bd = kv;
+            if (host.EndsWith(bd, StringComparison.OrdinalIgnoreCase) && !host.Equals(bd, StringComparison.OrdinalIgnoreCase))
+            { baseDomain = bd; return true; }
+        }
+        baseDomain = null; return false;
+    }
+
+    // ====== Admin / Reload ======
+    public void UpsertTenant(string key, TenantContext ctx) => _tenants[key] = ctx;
+    public bool RemoveTenant(string key) => _tenants.TryRemove(key, out _);
+
+    public void MapDomain(string domain, string tenantKey) => _domainToTenant[domain.Trim().ToLowerInvariant()] = tenantKey;
+    public bool UnmapDomain(string domain) => _domainToTenant.TryRemove(domain.Trim().ToLowerInvariant(), out _);
+
+    public void AddBaseDomain(string baseDomain) => _baseDomains[baseDomain.Trim().ToLowerInvariant()] = 1;
+    public bool RemoveBaseDomain(string baseDomain) => _baseDomains.TryRemove(baseDomain.Trim().ToLowerInvariant(), out _);
+}