feat: add legacy device migration flow

apps/licensing/admin.py

@@ -8,16 +8,20 @@ from django.urls import path, reverse
 
 from .models import (
     ClientDevice,
+    DeviceCredential,
     DeviceBindingAudit,
     DeviceSession,
     LicenseEvent,
     LicenseSeat,
+    LegacyMigrationGrant,
+    MigrationRequest,
     SoftwareEntitlement,
     SoftwarePlan,
 )
 from .services import (
     LicensingError,
     grant_software_entitlement,
+    create_legacy_migration_grant,
     renew_software_entitlement,
     revoke_software_entitlement,
 )
@@ -351,3 +355,70 @@ class LicenseEventAdmin(ReadOnlyLicenseAdmin):
         "reason",
     )
     list_select_related = ("entitlement", "seat", "device", "actor")
+
+
+class LegacyMigrationGrantForm(EntitlementGrantForm):
+    reason = forms.CharField(label="迁移原因", widget=forms.Textarea(attrs={"rows": 4}))
+
+
+@admin.register(LegacyMigrationGrant)
+class LegacyMigrationGrantAdmin(ReadOnlyLicenseAdmin):
+    list_display = ("user", "product_code", "entitlement", "status", "actor", "created_at")
+    list_filter = ("product_code", "status", "created_at")
+    search_fields = ("user__username", "user__email", "reason")
+    list_select_related = ("user", "entitlement", "actor")
+
+    def get_urls(self):
+        urls = super().get_urls()
+        return [
+            path(
+                "grant/",
+                self.admin_site.admin_view(self.grant_view),
+                name="licensing_legacymigrationgrant_grant",
+            ),
+        ] + urls
+
+    def grant_view(self, request):
+        form = LegacyMigrationGrantForm(request.POST or None)
+        if request.method == "POST" and form.is_valid():
+            try:
+                grant = create_legacy_migration_grant(
+                    user=form.cleaned_data["user"],
+                    plan=form.cleaned_data["plan"],
+                    reason=form.cleaned_data["reason"],
+                    actor=request.user,
+                )
+            except LicensingError as exc:
+                form.add_error(None, exc.message)
+            else:
+                self.message_user(request, "存量迁移资格已授予。", messages.SUCCESS)
+                return HttpResponseRedirect(
+                    reverse("admin:licensing_legacymigrationgrant_change", args=(grant.pk,))
+                )
+        context = {
+            **self.admin_site.each_context(request),
+            "title": "授予存量迁移资格",
+            "opts": self.model._meta,
+            "form": form,
+        }
+        return TemplateResponse(
+            request,
+            "admin/licensing/entitlement_operation.html",
+            context,
+        )
+
+
+@admin.register(MigrationRequest)
+class MigrationRequestAdmin(ReadOnlyLicenseAdmin):
+    list_display = ("request_id", "user", "device", "migration_grant", "status", "expires_at", "confirmed_at")
+    list_filter = ("status", "device__product_code", "expires_at")
+    search_fields = ("=request_id", "user__username", "user__email")
+    list_select_related = ("user", "device", "migration_grant")
+
+
+@admin.register(DeviceCredential)
+class DeviceCredentialAdmin(ReadOnlyLicenseAdmin):
+    list_display = ("token_prefix", "user", "product_code", "device", "entitlement", "expires_at", "revoked_at")
+    list_filter = ("product_code", "revoked_at", "expires_at")
+    search_fields = ("token_prefix", "user__username", "user__email")
+    list_select_related = ("user", "device", "entitlement", "seat")