feat: add email notification system for article reviews

backend/package.json

@@ -27,7 +27,10 @@
     "@nestjs/mongoose": "^11.0.3",
     "@nestjs/platform-express": "^11.0.1",
     "bcrypt": "^6.0.0",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.2",
     "mongoose": "^8.18.1",
+    "nodemailer": "^7.0.10",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1"
   },

backend/src/api/article/article.module.ts

@@ -1,15 +1,18 @@
 // article.module.ts
 import { Module } from '@nestjs/common';
 import { MongooseModule } from '@nestjs/mongoose';
+import { ConfigModule } from '@nestjs/config';
 import { ArticleController } from './article.controller';
 import { ArticleService } from './article.service';
 import { Article, ArticleSchema } from './article.schema';
+import { EmailService } from '../../services/email.service';
 
 @Module({
   imports: [
     MongooseModule.forFeature([{ name: Article.name, schema: ArticleSchema }]),
+    ConfigModule,
   ],
   controllers: [ArticleController],
-  providers: [ArticleService],
+  providers: [ArticleService, EmailService],
 })
 export class ArticleModule {}

backend/src/api/article/article.service.spec.ts

@@ -3,6 +3,8 @@ import { getModelToken } from '@nestjs/mongoose';
 import { ArticleService } from './article.service';
 import { Article, ArticleStatus, EvidenceType } from './article.schema';
 import { Model } from 'mongoose';
+import { EmailService } from '../../services/email.service';
+import { ConfigService } from '@nestjs/config';
 
 // Mock Article model
 const mockArticleModel = {
@@ -16,6 +18,17 @@ const mockArticleModel = {
   exec: jest.fn(),
 };
 
+// Mock EmailService
+const mockEmailService = {
+  sendMail: jest.fn().mockResolvedValue(true),
+  sendBulkMail: jest.fn().mockResolvedValue(true),
+};
+
+// Mock ConfigService
+const mockConfigService = {
+  get: jest.fn(),
+};
+
 describe('ArticleService', () => {
   let service: ArticleService;
   let model: Model<Article>;
@@ -28,6 +41,14 @@ describe('ArticleService', () => {
           provide: getModelToken(Article.name),
           useValue: mockArticleModel,
         },
+        {
+          provide: EmailService,
+          useValue: mockEmailService,
+        },
+        {
+          provide: ConfigService,
+          useValue: mockConfigService,
+        },
       ],
     }).compile();
 

backend/src/api/article/article.service.ts

@@ -4,11 +4,13 @@ import { InjectModel } from '@nestjs/mongoose';
 import { Model } from 'mongoose';
 import { Article, ArticleDocument, ArticleStatus } from './article.schema';
 import { CreateArticleDto, ReviewArticleDto } from './create-article.dto';
+import { EmailService } from '../../services/email.service';
 
 @Injectable()
 export class ArticleService {
   constructor(
     @InjectModel(Article.name) private articleModel: Model<ArticleDocument>,
+    private emailService: EmailService,
   ) {}
 
   // Get all articles (with optional filtering)
@@ -39,7 +41,10 @@ export class ArticleService {
   }
 
   // Find articles with similar DOIs (for duplicate checking)
-  async findArticlesBySimilarDOI(doi: string, excludeId?: string): Promise<Article[]> {
+  async findArticlesBySimilarDOI(
+    doi: string,
+    excludeId?: string,
+  ): Promise<Article[]> {
     // Query object to build the search criteria
     const query: any = { doi };
 
@@ -175,7 +180,10 @@ export class ArticleService {
       updateData['isDuplicate'] = true;
       // Prevent an article from being marked as duplicate of itself
       if (reviewData.duplicateOf === id) {
-        throw new HttpException('Cannot mark article as duplicate of itself', HttpStatus.BAD_REQUEST);
+        throw new HttpException(
+          'Cannot mark article as duplicate of itself',
+          HttpStatus.BAD_REQUEST,
+        );
       }
       updateData['duplicateOf'] = reviewData.duplicateOf;
     } else {
@@ -195,9 +203,98 @@ export class ArticleService {
       );
     }
 
+    // Send email notification to submitter
+    console.log(`Attempting to send notification email for article ${updatedArticle.customId} with status ${updatedArticle.status}`);
+    await this.sendReviewNotificationEmail(updatedArticle);
+
     return updatedArticle;
   }
 
+  // Send email notification to submitter about article review status
+  private async sendReviewNotificationEmail(article: Article) {
+    console.log(`Processing notification for article ${article.customId} with status ${article.status} and submitter email ${article.submitterEmail}`);
+
+    if (!article.submitterEmail) {
+      console.warn(`No submitter email found for article ${article.customId}`);
+      return;
+    }
+
+    let subject = '';
+    let htmlContent = '';
+
+    // Determine the content based on the status
+    if (article.status === ArticleStatus.APPROVED) {
+      subject = 'Your Article Has Been Approved - CISE_SPEED';
+      htmlContent = `
+        <h2>Article Review Result Notification</h2>
+        <p>Hello,</p>
+        <p>Your article <strong>"${article.title}"</strong> has been approved and added to the database.</p>
+        <p><strong>Article Details:</strong></p>
+        <ul>
+          <li>Title: ${article.title}</li>
+          <li>ID: ${article.customId}</li>
+          <li>Authors: ${article.authors}</li>
+          <li>Publication Year: ${article.pubyear}</li>
+          <li>Evidence Type: ${article.evidence}</li>
+        </ul>
+        <p>Thank you for contributing to the CISE_SPEED database!</p>
+        <p>If you have any questions, please feel free to contact us.</p>
+      `;
+    } else if (article.status === ArticleStatus.REJECTED) {
+      subject = 'Article Review Result - CISE_SPEED';
+      htmlContent = `
+        <h2>Article Review Result Notification</h2>
+        <p>Hello,</p>
+        <p>Unfortunately, your article <strong>"${article.title}"</strong> did not pass the review.</p>
+
+        ${article.reviewComment ? `<p><strong>Review Comment:</strong> ${article.reviewComment}</p>` : ''}
+
+        <p><strong>Article Details:</strong></p>
+        <ul>
+          <li>Title: ${article.title}</li>
+          <li>ID: ${article.customId}</li>
+          <li>Authors: ${article.authors}</li>
+          <li>Publication Year: ${article.pubyear}</li>
+        </ul>
+        <p>Thank you for your interest and contribution to the CISE_SPEED database!</p>
+        <p>If you have any questions, please feel free to contact us.</p>
+      `;
+    } else {
+      // For other status changes (like back to PENDING), we could send a generic notification
+      console.log(
+        `Article ${article.customId} status changed to ${article.status}, no email notification required.`,
+      );
+      return;
+    }
+
+    console.log(`Attempting to send email to ${article.submitterEmail} with subject: ${subject}`);
+
+    try {
+      const result = await this.emailService.sendMail(
+        article.submitterEmail,
+        subject,
+        htmlContent,
+        `CISE_SPEED: Your article "${article.title}" has been reviewed`, // text
+        'CISE_SPEED System', // fromName
+      );
+
+      if (result) {
+        console.log(
+          `Notification email sent successfully to ${article.submitterEmail} for article ${article.customId}`,
+        );
+      } else {
+        console.error(
+          `Failed to send notification email to ${article.submitterEmail} for article ${article.customId}`,
+        );
+      }
+    } catch (error) {
+      console.error(
+        `Error sending notification email to ${article.submitterEmail} for article ${article.customId}:`,
+        error,
+      );
+    }
+  }
+
   // Search articles by keywords and filters with sorting
   async searchArticles(
     keywords: string,

backend/src/app.module.ts

@@ -5,13 +5,15 @@ import { MongooseModule } from '@nestjs/mongoose';
 import { ConfigModule } from '@nestjs/config';
 import { ArticleModule } from './api/article/article.module';
 import { UserModule } from './api/user/user.module';
+import { EmailModule } from './services/email.module';
 
 @Module({
   imports: [
     ConfigModule.forRoot(),
     MongooseModule.forRoot(process.env.DB_URI || ''),
     ArticleModule,
     UserModule,
+    EmailModule,
   ],
   controllers: [AppController],
   providers: [AppService],