feat: create Files service for s3 uploads

Author: eug-vs

services/files/files.class.ts

@@ -0,0 +1,33 @@
+import { Application } from '@feathersjs/express';
+import { Params } from '@feathersjs/feathers';
+import { S3 } from 'aws-sdk';
+import { v4 as uuidv4 } from 'uuid';
+
+
+export default class Files {
+  app!: Application;
+  s3!: S3;
+  bucket!: string;
+
+  async find(params: Params): Promise<string> {
+    // Return signed upload URL
+    return this.s3.getSignedUrl('putObject', {
+      Bucket: this.bucket,
+      Key: `${params.user?.username}/${uuidv4()}.png`,
+      ContentType: 'image/*',
+      Expires: 300,
+    });
+  }
+
+  setup(app: Application): void {
+    this.app = app;
+    this.s3 = new S3({
+      accessKeyId: process.env.ACCESSKEYID,
+      secretAccessKey: process.env.SECRETACCESSKEY,
+      signatureVersion: 'v4',
+      region: 'eu-central-1'
+    });
+    this.bucket = process.env.BUCKET || '';
+  }
+}
+

services/files/files.service.ts

@@ -0,0 +1,7 @@
+import { Application } from '@feathersjs/express';
+import Files from './files.class';
+
+export default (app: Application): void => {
+  app.use('/files', new Files());
+};
+

services/index.ts

@@ -6,6 +6,7 @@ import Votes from './votes/votes.service';
 import Auth from './auth/auth.service';
 import Feed from './feed/feed.service';
 import Feedback from './feedback/feedback.service';
+import Files from './files/files.service';
 
 import tryAuthenticate from '../hooks/tryAuthenticate';
 import logging from '../hooks/logging';
@@ -19,6 +20,7 @@ export default (app: Application): void => {
   app.configure(Votes);
   app.configure(Feed);
   app.configure(Feedback);
+  app.configure(Files);
 
   app.hooks({
     before: {