AI da dat ten cho dong song

src/OpenAI/openai.module.ts

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+import { ClientOptions, OpenAI } from 'openai';
+
+import { Module } from '@nestjs/common';
+import { OpenaiService } from './openai.service';
+
+const openaiOptions: ClientOptions = {
+  apiKey: process.env.OPENAI_API_KEY,
+  baseURL: process.env.OPENAI_BASE_URL,
+  maxRetries: parseInt(process.env.OPENAI_MAX_RETRIES as string) ?? 3,
+};
+
+@Module({
+  imports: [OpenAI],
+  providers: [
+    {
+      provide: OpenAI,
+      useFactory: () => new OpenAI(openaiOptions),
+    },
+    OpenaiService,
+  ],
+  exports: [OpenaiService],
+})
+export class OpenaiModule {}

src/OpenAI/openai.service.ts

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+import { Injectable } from '@nestjs/common';
+import { OpenAI } from 'openai';
+
+@Injectable()
+export class OpenaiService {
+  constructor(private openai: OpenAI) {}
+
+  async generateInvitationMailContent(
+    mail: string,
+    username: string,
+    url: string,
+  ) {
+    const prompt = `
+    give me mail content for invitation to a workshop to EPESS and replace {{ mail }} with ${mail}, {{ username }} with ${username} and {{ url }} with ${url}
+    `;
+
+    const response = await this.openai.chat.completions.create({
+      model: 'gpt-4o',
+      messages: [{ role: 'user', content: prompt }],
+    });
+
+    return response.choices[0].message.content;
+  }
+}