Added listFiles function

Author: NimperX

src/ErrorThrower.ts

@@ -1,6 +1,6 @@
 import { IConfig } from './types';
 
-export const throwError = (config: IConfig, file: File) => {
+export const throwError = (config: IConfig) => {
   if (config.bucketName === null || config.bucketName === '') {
     throw new Error(`Your bucketName cannot be empty `);
   }
@@ -13,7 +13,12 @@ export const throwError = (config: IConfig, file: File) => {
   if (config.secretAccessKey === null || config.secretAccessKey === '') {
     throw new Error(`Must provide secretAccessKey`);
   }
+};
+
+export const throwUploadError = (config: IConfig, file: File) => {
+  throwError(config);
+
   if (!file) {
     throw new Error(`File cannot be empty`);
   }
-};
+}

src/react-aws-s3.ts

@@ -1,7 +1,7 @@
 import shortId from 'short-uuid';
 import { dateYMD, xAmzDate } from './Date';
-import { IConfig, DeleteResponse, UploadResponse } from './types';
-import { throwError } from './ErrorThrower';
+import { IConfig, ListFileErrorResponse, ListFileResponse, UploadResponse } from './types';
+import { throwUploadError } from './ErrorThrower';
 import GetUrl from './Url';
 import Policy from './Policy';
 import Signature from './Signature';
@@ -13,7 +13,7 @@ class ReactS3Client {
     this.config = config;
   }
   public async uploadFile(file: File, newFileName?: string): Promise<UploadResponse> {
-    throwError(this.config, file);
+    throwUploadError(this.config, file);
     let fileExtension: string;
     const fd = new FormData();
 
@@ -78,6 +78,53 @@ class ReactS3Client {
       },
     );
   }
+
+  public async listFiles() {
+    const awsConfig = (({ region, accessKeyId, secretAccessKey }) => ({ region, accessKeyId, secretAccessKey }))(
+      this.config,
+    );
+    AWS.config.update(awsConfig);
+
+    const s3 = new AWS.S3({
+      apiVersion: '2006-03-01',
+      params: {
+        Bucket: this.config.bucketName,
+      },
+    });
+
+    try {
+      const req = await s3.listObjects({
+        Bucket: this.config.bucketName,
+      }).promise();
+
+      if (req.$response.error) {
+        return Promise.reject<ListFileErrorResponse>({
+          err: req.$response.error.name,
+          errMessage: req.$response.error.message,
+          data: req.$response.error
+        });
+      }
+
+      if (!req.$response.data) {
+        return Promise.reject<ListFileErrorResponse>({
+          err: 'Something went wrong!',
+          errMessage: 'Unknown error occured. Please try again',
+          data: null
+        });
+      }
+
+      return Promise.resolve<ListFileResponse>({
+        message: 'Objects listed succesfully',
+        data: req.$response.data
+      });
+    } catch (err) {
+      return Promise.reject<ListFileErrorResponse>({
+        err: 'Something went wrong!',
+        errMessage: 'Unknown error occured. Please try again',
+        data: err
+      });
+    }
+  }
 }
 
 export default ReactS3Client;

src/types.ts

@@ -46,3 +46,14 @@ export type DeleteResponse = {
   message: string;
   fileName: string;
 };
+
+export type ListFileResponse = {
+  message: string;
+  data: AWS.S3.ListObjectsOutput
+};
+
+export type ListFileErrorResponse = {
+  err: string;
+  errMessage: string;
+  data: any;
+};