version 0.0.1

Author: morrys

.gitignore

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+node_modules
+lib
+*.tgz

.npmignore

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+src/
+*.tgz
+tsconfig.json

README.md

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-# relay-middleware-upload-s3
+# [React Relay Upload S3](https://github.com/morrys/react-relay-upload-s3)
 Middleware for Relay Modern Network Layer for upload file to AWS S3
+
+## Installation
+
+Install react-relay-upload-s3 using yarn or npm:
+
+```
+yarn add react-relay-upload-s3
+```
+
+## Usage
+
+```typescript
+import {uploadS3Middleware} from 'react-relay-upload-s3';
+```
+
+```typescript
+const network = new RelayNetworkLayer(
+  [
+    urlMiddleware(...),
+    uploadS3Middleware({credentials: complexObjectsCredentials}),
+    authMiddleware(...),
+  ],
+  {}
+);
+```
+
+## TODO
+
+Document how to use urlMiddleware and authMiddleware in the context of AWS
+
+Implementation of Middleware for IAM Authentication
+
+
+## License
+
+React Relay Upload S3 is [MIT licensed](./LICENSE).
+

package-lock.json

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+{
+  "name": "react-relay-upload-s3",
+  "version": "0.0.1",
+  "keywords": [
+    "graphql",
+    "relay",
+    "upload",
+    "react",
+    "aws",
+    "appsync",
+    "s3"
+  ],
+  "main": "lib/index.js",
+  "license": "SEE LICENSE IN LICENSE",
+  "description": "React Relay Middleware Upload S3",
+  "author": {
+    "name": "morrys"
+  },
+  "homepage": "https://github.com/morrys/react-relay-upload-s3",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/morrys/react-relay-upload-s3"
+  },
+  "scripts": {
+    "prepare": "tsc"
+  },
+  "dependencies": {},
+  "peerDependencies": {
+    "react-relay": ">=1.4.0"
+  },
+  "devDependencies": {
+    "typescript": "3.1.1",
+    "aws-sdk": "^2.449.0",
+    "react-relay-network-modern": "^2.5.1"
+  }
+}

package.json

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+export {default as uploadS3Middleware} from "./middleware-upload-s3";

src/index.ts

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+import { Middleware, RelayNetworkLayerRequest } from 'react-relay-network-modern/lib/definition';
+import { Credentials, CredentialsOptions } from 'aws-sdk/lib/credentials';
+import * as S3 from 'aws-sdk/clients/s3';
+
+type CredentialsGetter = () => (Credentials | CredentialsOptions | Promise<Credentials> | Promise<CredentialsOptions> | null) | Credentials | CredentialsOptions | Promise<Credentials> | Promise<CredentialsOptions> | null;
+
+export type UploadS3MiddlewareOpts = {
+    credentials: CredentialsGetter
+};
+
+export interface FileS3Type {
+    bucket: string
+    key: string
+    region: string
+    file: File | Blob
+}
+
+export interface UploadableS3 {
+    [key: string]: FileS3Type;
+}
+
+function upload(fileField: FileS3Type, { credentials }) {
+    const Body = fileField.file;
+    const { type: ContentType } = Body;
+    
+    const {
+        bucket: Bucket,
+        key: Key,
+        region,
+    } = fileField;
+    const s3 = new S3({
+        credentials,
+        region,
+    });
+
+    return s3.upload({
+        Bucket,
+        Key,
+        Body,
+        ContentType,
+    }).promise();
+};
+
+export default function uploadS3Middleware(opts: UploadS3MiddlewareOpts): Middleware {
+  const {
+    credentials,
+  } = opts;
+  return (next) => async (req: RelayNetworkLayerRequest) => {
+    const uploadables: UploadableS3 = req.uploadables;
+      if (uploadables) {
+        const uploadCredentials = typeof credentials === 'function' ? (credentials as any).call() : credentials;
+        const uploadPromise = Promise.resolve(uploadCredentials)
+          .then(credentials => {
+            const uploadPromises = Object.entries(uploadables).map(([_, fileUpload]) => upload(fileUpload, { credentials }));
+            return Promise.all([...uploadPromises] as Promise<any>[]);
+          }).then(() => {
+            delete req.uploadables;
+            req.fetchOpts.body = req.prepareBody();
+            return next(req)
+          })
+        return uploadPromise;
+      } else {
+        return next(req)
+      }
+  };
+}

src/middleware-upload-s3.ts

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+{
+    "compilerOptions": {
+        "outDir": "lib",
+        "rootDir": "src",
+        "module": "commonjs",
+        "target": "es5",
+        "moduleResolution": "node",
+        "noEmitOnError": true,
+        "declaration": true,
+        "lib": [
+            "dom",
+            "es6",
+            "esnext.asynciterable",
+            "es2017.object"
+        ],
+        "jsx": "react",
+        "skipLibCheck": true
+    },
+    "exclude": [
+        "lib",
+        "__tests__"
+    ],
+    "compileOnSave": true
+}