feat: generate upload signed url for oci

src/document/services/document.service.ts

@@ -1,6 +1,6 @@
 import { Injectable, Logger } from '@nestjs/common';
 import { FindOptionsWhere } from 'typeorm';
-import { UploadDocumentRequestDto } from '../dtos/request';
+import { GenerateUploadSignedUrlRequestDto, UploadDocumentRequestDto } from '../dtos/request';
 import { Document } from '../entities';
 import { DocumentRepository } from '../repositories';
 import { OciService } from './oci.service';
@@ -24,4 +24,11 @@ export class DocumentService {
     this.logger.log(`finding document with id ${id}`);
     return this.documentRepository.findDocumentById(id);
   }
+
+  generateUploadSignedUrl(body: GenerateUploadSignedUrlRequestDto) {
+    this.logger.log(
+      `generating signed URL for document type ${body.documentType} with original file name ${body.originalFileName}`,
+    );
+    return this.ociService.generateUploadPreSignedUrl(body);
+  }
 }

src/document/services/oci.service.ts

@@ -8,7 +8,7 @@ import { CreatePreauthenticatedRequestDetails } from 'oci-objectstorage/lib/mode
 import path from 'path';
 import { CacheService } from '~/common/modules/cache/services';
 import { BUCKETS } from '../constants';
-import { UploadDocumentRequestDto } from '../dtos/request';
+import { GenerateUploadSignedUrlRequestDto, UploadDocumentRequestDto } from '../dtos/request';
 import { UploadResponseDto } from '../dtos/response';
 import { Document } from '../entities';
 import { generateNewFileName } from '../utils';
@@ -106,4 +106,47 @@ export class OciService {
       return document.name;
     }
   }
+
+  async generateUploadPreSignedUrl({
+    documentType,
+    originalFileName,
+    extension,
+  }: GenerateUploadSignedUrlRequestDto): Promise<UploadResponseDto> {
+    const bucketName = BUCKETS[documentType];
+
+    if (!bucketName) {
+      this.logger.error('Could not find bucket name for document type', documentType);
+      throw new BadRequestException('DOCUMENT.TYPE_NOT_SUPPORTED');
+    }
+
+    const objectName = generateNewFileName(originalFileName);
+    const expiration = moment().add('1', 'hours').toDate();
+
+    try {
+      this.logger.debug(`Generating pre-signed upload URL for object ${objectName} in bucket ${bucketName}`);
+
+      const response = await this.ociClient.createPreauthenticatedRequest({
+        namespaceName: this.namespace,
+        bucketName,
+        createPreauthenticatedRequestDetails: {
+          name: `upload-${objectName}`,
+          accessType: CreatePreauthenticatedRequestDetails.AccessType.ObjectWrite, // 🔑 for upload
+          timeExpires: expiration,
+          objectName: `${objectName}${extension}`, // Ensure the object name includes the extension
+        },
+      });
+
+      this.logger.log(`Generated upload URL for ${objectName}`);
+
+      return plainToInstance(UploadResponseDto, {
+        name: objectName,
+        extension,
+        url: response.preauthenticatedRequest.fullPath,
+        documentType,
+      });
+    } catch (error) {
+      this.logger.error('Error generating pre-signed upload URL', error);
+      throw new BadRequestException('UPLOAD.URL_GENERATION_FAILED');
+    }
+  }
 }