user agent report

src/ORM/_views/user-agent-report/user-agent-report.module.ts

@@ -0,0 +1,15 @@
+import { Global, Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+
+import { UserAgentReportService } from './user-agent-report.service';
+import { UserAgentReportView } from './user-agent-report.view';
+
+
+
+@Global()
+@Module({
+    imports: [TypeOrmModule.forFeature([UserAgentReportView])],
+    providers: [UserAgentReportService],
+    exports: [TypeOrmModule, UserAgentReportService],
+})
+export class UserAgentReportModule { }

src/ORM/_views/user-agent-report/user-agent-report.service.ts

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+import { Injectable } from '@nestjs/common';
+import { InjectRepository } from '@nestjs/typeorm';
+import { Repository } from 'typeorm';
+
+import { UserAgentReportView } from './user-agent-report.view';
+
+@Injectable()
+export class UserAgentReportService {
+
+    constructor(
+        @InjectRepository(UserAgentReportView)
+        private userAgentReport: Repository<UserAgentReportView>,
+    ) {
+
+    }
+
+    public async getReport() {
+        return await this.userAgentReport.find();
+    }
+
+    public async refreshReport() {
+        try {
+            return await this.userAgentReport.query(`
+            COMMIT;
+            BEGIN TRANSACTION ISOLATION LEVEL REPEATABLE READ;
+            REFRESH MATERIALIZED VIEW user_agent_report_view;
+            COMMIT;
+        `);
+        } catch (e) {
+
+            console.log(e)
+        }
+
+    }
+}

src/ORM/_views/user-agent-report/user-agent-report.view.ts

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+import { DataSource, ViewColumn, ViewEntity } from 'typeorm';
+
+import { ClientEntity } from '../../client/client.entity';
+
+@ViewEntity({
+    materialized: true,
+    expression: (dataSource: DataSource) =>
+        dataSource
+            .createQueryBuilder()
+            .select('client.userAgent as "userAgent"')
+            .addSelect('COUNT(client.userAgent)', 'count')
+            .addSelect('MAX(client.bestDifficulty)', 'bestDifficulty')
+            .addSelect('SUM(client.hashRate)', 'totalHashRate')
+            .from(ClientEntity, 'client')
+            .groupBy('client.userAgent')
+            .orderBy('"totalHashRate"', 'DESC')
+})
+export class UserAgentReportView {
+    @ViewColumn()
+    userAgent: string;
+    @ViewColumn()
+    count: number;
+    @ViewColumn()
+    bestDifficulty: number;
+    @ViewColumn()
+    totalHashRate: number;
+}