feat: user usage init (#5074)

packages/backend/server/src/modules/features/index.ts

@@ -0,0 +1,54 @@
+import { Module } from '@nestjs/common';
+
+import { PrismaService } from '../../prisma';
+import { FeatureService } from './configure';
+import { FeatureManagementService } from './feature';
+import type { CommonFeature } from './types';
+
+// upgrade features from lower version to higher version
+async function upsertFeature(
+  db: PrismaService,
+  feature: CommonFeature
+): Promise<void> {
+  const hasEqualOrGreaterVersion =
+    (await db.features.count({
+      where: {
+        feature: feature.feature,
+        version: {
+          gte: feature.version,
+        },
+      },
+    })) > 0;
+  // will not update exists version
+  if (!hasEqualOrGreaterVersion) {
+    await db.features.create({
+      data: {
+        feature: feature.feature,
+        type: feature.type,
+        version: feature.version,
+        configs: feature.configs,
+      },
+    });
+  }
+}
+
+/**
+ * Feature module provider pre-user feature flag management.
+ * includes:
+ * - feature query/update/permit
+ * - feature statistics
+ */
+@Module({
+  providers: [FeatureService, FeatureManagementService],
+  exports: [FeatureService, FeatureManagementService],
+})
+export class FeatureModule {}
+
+export type { CommonFeature, Feature } from './types';
+export { FeatureKind, Features, FeatureType } from './types';
+export {
+  FeatureManagementService,
+  FeatureService,
+  PrismaService,
+  upsertFeature,
+};