feat: upload module (#486)

* feat: wip upload module

* feat: local storage and serve local images

* feat: protect against injections

* feat: server local and s3 files

* fix: use storage location when serving local files

* feat: cross field env validation

server/src/core/file/resolvers/file-upload.resolver.ts

@@ -0,0 +1,60 @@
+import { Args, Mutation, Resolver } from '@nestjs/graphql';
+import { GraphQLUpload, FileUpload } from 'graphql-upload';
+import { v4 as uuidV4 } from 'uuid';
+import { FileUploadService } from '../services/file-upload.service';
+import { UseGuards } from '@nestjs/common';
+import { JwtAuthGuard } from 'src/guards/jwt.auth.guard';
+import { streamToBuffer } from 'src/utils/stream-to-buffer';
+import { FileFolder } from '../interfaces/file-folder.interface';
+
+@UseGuards(JwtAuthGuard)
+@Resolver()
+export class FileUploadResolver {
+  constructor(private readonly fileUploadService: FileUploadService) {}
+
+  @Mutation(() => String)
+  async uploadFile(
+    @Args({ name: 'file', type: () => GraphQLUpload })
+    { createReadStream, filename, mimetype }: FileUpload,
+    @Args('fileFolder', { type: () => FileFolder, nullable: true })
+    fileFolder: FileFolder,
+  ): Promise<string> {
+    const stream = createReadStream();
+    const buffer = await streamToBuffer(stream);
+    const ext = filename.split('.')?.[1];
+    const id = uuidV4();
+    const name = `${id}${ext ? `.${ext}` : ''}`;
+
+    const path = await this.fileUploadService.uploadFile({
+      file: buffer,
+      name,
+      mimeType: mimetype,
+      fileFolder,
+    });
+
+    return path.name;
+  }
+
+  @Mutation(() => String)
+  async uploadImage(
+    @Args({ name: 'file', type: () => GraphQLUpload })
+    { createReadStream, filename, mimetype }: FileUpload,
+    @Args('fileFolder', { type: () => FileFolder, nullable: true })
+    fileFolder: FileFolder,
+  ): Promise<string> {
+    const stream = createReadStream();
+    const buffer = await streamToBuffer(stream);
+    const ext = filename.split('.')?.[1];
+    const id = uuidV4();
+    const name = `${id}${ext ? `.${ext}` : ''}`;
+
+    const path = await this.fileUploadService.uploadImage({
+      file: buffer,
+      name,
+      mimeType: mimetype,
+      fileFolder,
+    });
+
+    return path.name;
+  }
+}