HAT JS
Overview
This library contains all the API calls needed to communicate with the HAT
- Authentication.
- Fetch Applications and Data Plugs.
- Fetch Data Debits.
- Read and write data to endpoints.
- File API.
Table of Contents
- Supported environments
- Installation
- Usage
- Authentication
- Applications
- HAT Data
- Data Debits
- File API
- Handling errors
- FAQ
- License
Supported Environments
HAT JS supports all the modern browsers. Some older browsers do not support all the features required by HAT JS. If you want to support these browsers you need to load polyfill for Promise.
Installation
HAT JS is available as @dataswift/hat-js package on npm.
NPM installation
npm install @dataswift/hat-js
CDN Link
Check the latest released version on npmjs.com.
<script src="https://cdn.dataswift.io/libs/hatjs/hat-vX.X.X.min.js"></script>
Usage
Importing
ES6
import { HatClient } from '@dataswift/hat-js';
ES5 Modules
var HatClient = require("@dataswift/hat-js").HatClient;
Initialisation
Configuration type:
interface HatClientConfig {
apiVersion?: string; // Api Version for the HAT. eg. v2.6
hatDomain?: string; // The HAT domain of the user. eg. testing.hubat.net
token?: string; // The Application token.
secure?: boolean; // If you want to run the HAT locally, you have to modify this field to 'false'.
onTokenChange?: Function;
}
Example:
const config = {
token: '<access-token>',
apiVersion: 'v2.6',
secure: true,
onTokenChange: (newToken) => storeNewToken(newToken),
};
const hat = new HatClient(config);
Authentication
Check if HAT exists
Parameters | Type |
---|---|
hatDomain | string |
Example:
const hatDomain = 'testing.hubat.net';
try {
const res = hat.auth().isDomainRegistered(hatDomain);
if (res) {
// HAT domain is registered
}
} catch (e) {
// HAT domain doesn't exist
}
Sign out
Example:
hat.auth().signOut();
Get HAT domain
Example:
const res = hat.auth().getHatDomain();
if (res) {
// Returns the HAT Domain
// eg. testing.hubat.net
}
Get auth token
Example:
const res = hat.auth().getToken();
if (res) {
// Returns the auth token
}
Check if token has expired
Example:
const token = '<auth-token>';
if (hat.auth().isTokenExpired(token)) {
// Token has expired
}
Generate HAT login URL
Example:
const hatDomain = 'testing.hubat.net';
const appId = 'our-app-id';
const redirect = 'callback-url';
const fallback = 'fallback-url';
const url = hat.auth().generateHatLoginUrl(hatDomain, appId, redirect, fallback);
if (url) {
window.location.href = url;
}
Applications
Get all the apps
The are 2 ways to fetch applications:
With default options:
Example:
try {
const result = await hat.applications().getAllDefault();
if (result.parsedBody) {
// result.parsedBody contains an array of Applications.
}
} catch (error) {
// The request failed...
}
With custom options:
Example:
// In custom options you can specify the following parameters: "ordering", "orderBy", "take", "skip"
const options = {
ordering: 'descending',
orderBy: 'name',
};
try {
const result = await hat.applications().getAll(options);
if (result.parsedBody) {
// result.parsedBody contains an array of Applications.
}
} catch (error) {
// The request failed...
}
Get an application with a specific ID
Example:
try {
const result = await hat.applications().getById('testhatapp');
if (result.parsedBody) {
// result.parsedBody contains the application.
}
} catch (error) {
// The request failed...
}
Get an application status
Parameters | Type |
---|---|
application | HatApplication |
Example:
const status = hat.applications().getAppStatus(application);
console.log(status);
// Will print one of 'goto' | 'running' | 'fetching' | 'failing' | 'untouched' | 'update';
Generate a Data Plug setup URL
You can generate a URL in order to redirect the user to setup a Data Plug.
Parameters | Type |
---|---|
application | HatApplication |
redirect | string |
fallback | string |
Example:
const redirectUrl = 'https://myapp.dataswift.io/app/redirect';
const fallbackUrl = 'https://myapp.dataswift.io/app/fallback';
const generatedUrl = hat.applications().getSetupUrl(application, redirectUrl, fallbackUrl);
console.log(generatedUrl);
// Will print: https://testing.hubat.net/#/hatlogin?name=facebook&fallback=https://myapp.dataswift.io/app/fallback&redirect=https://facebook.hubofallthings.com%3Fredirect=https://myapp.dataswift.io/app/redirect
window.location.href = generatedUrl; // Navigate the user to setup the Data Plug.
HAT Data
Response type:
interface HatRecord<T> {
endpoint: string; // eg. locations
recordId: string; // A unique record ID of the record.
data: T; // The Data
}
Write Data
Parameters | Type |
---|---|
namespace | string |
endpoint | string |
body | object |
Response
- HatRecord<T>
Example:
const namespace = 'testhatapp';
const endpoint = 'locations';
const newLocation = {
latitude: '51.01',
longitude: '52.12',
};
try {
const result = await hat.hatData().create(namespace, endpoint, newLocation);
if (result.parsedBody) {
// result.parsedBody contains a HatRecord with the new data.
}
} catch (error) {
// Failed to write data...
}
Update Data
Parameters | Type |
---|---|
body | Array<HatRecord<T>> |
Response:
- Array<HatRecord<T>>
Example:
const location = {
endpoint: 'testhatapp/locations',
recordId: 'c14b8f73-157f-40f1-9c77-985d9dea50d2',
data: {
latitude: '51.01',
longitude: '52.12',
},
};
location.data.latitude = '49.01';
const records = [location]; // Array of records to update. In this case we have only one.
try {
const result = await hat.hatData().update(records);
if (result.parsedBody) {
// result.parsedBody contains an array of HatRecords<T> with the updated location data.
}
} catch (error) {
// Failed to update the records...
}
Delete Data
Parameters | Type |
---|---|
recordIds | Array |
Response:
- A successful response message
Example:
const recordIds = ['c14b8f73-157f-40f1-9c77-985d9dea50d2', 'd52b8f73-151f-40f1-9c77-932d9dea5daa'];
try {
const result = await hat.hatData().delete(recordIds);
if (result.parsedBody) {
// result.parsedBody contains a successful response message.
// In this case the result will be {message: "All records deleted"}.
}
} catch (error) {
// Failed to delete records...
}
Read Data
The are 2 ways to fetch data:
With default options:
Parameters | Type |
---|---|
namespace | string |
endpoint | string |
Response
- Array<HatRecord<T>>
Example:
const namespace = 'testhatapp';
const endpoint = 'locations';
try {
const result = await hat.hatData().getAllDefault(namespace, endpoint);
if (result.parsedBody) {
// result.parsedBody contains an Array of HatRecord<Location>.
}
} catch (error) {
// Failed to fetch the data
}
With custom options:
Example:
const options = {
ordering: 'descending',
orderBy: 'lastUpdated',
};
const namespace = 'testhatapp';
const endpoint = 'locations';
try {
const result = await hat.hatData().getAll(namespace, endpoint, options);
if (result.parsedBody) {
// result.parsedBody contains an Array of HatRecords<Location>, ordered by the last updated date.
}
} catch (error) {
// Failed to fetch the data
}
Data Debits
Get all the Data Debits
The are 2 ways to fetch data debits:
With default options:
Response:
- Array<DataDebit>: An array of Data Debits.
Example:
try {
const result = await hat.dataDebits().getAllDefault();
if (result.parsedBody) {
// result.parsedBody contains an array of Data Debits.
}
} catch (error) {
// Failed to fetch Data Debits.
}
With custom options:
Parameters | Type |
---|---|
options | Object |
Response:
- Array<DataDebit>: An array of Data Debits.
Example:
// In custom options you can specify the following parameters: "ordering", "orderBy", "take", "skip"
const options = {
ordering: 'descending',
orderBy: 'name',
};
try {
const result = await hat.dataDebits().getAll(options);
if (result.parsedBody) {
// result.parsedBody contains an array of Data Debits.
}
} catch (error) {
// Failed to fetch Data Debits.
}
Get a Data Debit with a specific ID
Parameters | Type |
---|---|
DataDebitId | string |
Response: DataDebit: The Data Debit object.
Example:
try {
const result = await hat.dataDebits().getById('your-data-debit-id');
if (result.parsedBody) {
// result.parsedBody contains the data debit.
}
} catch (e) {
// Failed to get Data Debit by ID...
}
Get Data Debit values
Parameters | Type |
---|---|
DataDebitId | string |
Response:
- DataDebitValues: The Data Debit values bundle.
Response type:
interface DataDebitValues<T> {
bundle: { [endpoint: string]: Array<HatRecord<T>> };
}
Example:
try {
const result = await hat.dataDebits().getDataDebitValues('your-data-debit-id');
if (result.parsedBody) {
// result.parsedBody contains the bundle.
}
} catch (error) {
// Failed to get Data Debit values...
}
File API
Upload a File
Parameters | Type |
---|---|
metadata | FileMetadataReq |
file | ArrayBuffer | Buffer |
fileType | string |
Response:
- FileMetadataRes: The File metadata.
FileMetadataReq type:
interface FileMetadataReq {
name: string;
source: string;
tags?: string[];
title?: string;
description?: string;
dateCreated?: number;
lastUpdated?: number;
}
Response type:
interface FileMetadataRes {
fileId: string;
name: string;
source: string;
tags?: string[];
title?: string;
description?: string;
dateCreated: number;
lastUpdated: number;
status: FileStatus;
contentUrl?: string;
contentPublic: boolean;
permissions: FilePermissions;
}
interface FileStatus {
status: string;
size?: number;
}
interface FilePermissions {
userId: string;
contentReadable: boolean;
}
Example:
try {
const meta = {
name: 'testFileName',
source: 'applicationName',
tags: ['iphone', 'photo'],
};
const file = []; // ArrayBuffer or Buffer
const result = await hat.files().uploadFile(meta, file, 'image/png');
if (result.parsedBody) {
// result.parsedBody contains the File metadata.
}
} catch (error) {
// Failed to upload a file...
}
Example response:
{
"fileId": "applicationnametestfilename-5",
"name": "testFileName",
"source": "applicationName",
"dateCreated": "2020-03-04T13:13:37.041Z",
"lastUpdated": "2020-03-04T13:13:37.042Z",
"tags": [
"iphone",
"photo"
],
"status": {
"status": "New"
},
"contentUrl": "https://hubat-net-hatservice-v3ztbxc9civz-storages3bucket-m0gs7co0oyi2.s3.eu-west-1.amazonaws.com/testing.hubat.net/applicationnametestfilename-5?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Date=20190404T131337Z&X-Amz-SignedHeaders=host%3Bx-amz-server-side-encryption&X-Amz-Expires=299&X-Amz-Credential=AKIAICFRCZUZIP4PQ64A%2F20190404%2Feu-west-1%2Fs3%2Faws4_request&X-Amz-Signature=6e7b112fca980dafe9935e8c849dfdb7e4e49abb658947909ec35c12370247b2",
"contentPublic": false,
"permissions": [
{
"userId": "de35e18d-147f-4664-8de7-409abf881754",
"contentReadable": true
}
]
}
Mark a file as public
Parameters | Type |
---|---|
fileId | string |
Response:
- FileMetadataRes: The File metadata.
Example:
try {
const result = await hat.files().markFileAsPublic('file-id');
if (result.parsedBody) {
// result.parsedBody contains the File metadata.
}
} catch (error) {
// Failed to mark a file as public...
}
Mark a file as private
Parameters | Type |
---|---|
fileId | string |
Response:
- FileMetadataRes: The File metadata.
Example:
try {
const result = await hat.files().markFileAsPrivate('file-id');
if (result.parsedBody) {
// result.parsedBody contains the File metadata.
}
} catch (error) {
// Failed to mark a file as private...
}
Update File metadata
Parameters | Type |
---|---|
fileId | string |
Response:
- FileMetadataRes: The File metadata.
Example:
try {
const meta = {
name: 'differentFileName',
source: 'applicationName',
tags: ['iphone', 'photo', 'extra tag'],
};
const result = await hat.files().updateFileParameters('file-id', meta);
if (result.parsedBody) {
// result.parsedBody contains the File metadata.
}
} catch (error) {
// Failed to update file's metadata...
}
Search Files
Parameters | Type |
---|---|
metadata | FileMetadataReq |
Response:
- Array: An array of File metadata.
Example:
try {
const meta = {
name: '',
source: 'applicationName',
tags: ['iphone', 'photo'],
};
const result = await hat.files().searchFiles(meta);
if (result.parsedBody) {
// result.parsedBody contains an array of File metadata.
// The result contains all the files with the tags "iphone" and "photo" with the same source.
}
} catch (error) {
// Failed to search for Files...
}
Delete File
Parameters | Type |
---|---|
fileId | string |
Response:
- FileMetadataRes: The File metadata.
Example:
try {
const result = await hat.files().deleteFile('file-id');
if (result.parsedBody) {
// result.parsedBody contains the File metadata.
}
} catch (error) {
// Failed to delete the File...
}
Generate File content URL
Parameters | Type |
---|---|
fileId | string |
Response:
- string: The URL to the content.
Example:
const url = hat.files().getFileContentUrl('file-id');
console.log(url);
// will print:
// https://<hat-url>/api/v2.6/files/content/<file-id>>
// The file will be available in this URL.
// Note: if the file is private, will need to pass the authentication token as
// a header to access the file.
Handling Errors
HAT JS error response:
{
cause: string, // The cause of the error.
message: string, // The message of the error.
status: number // When the cause is HAT_API_EXCEPTION you can handle the HTTP response code.
}
Error Codes:
Cause | Message | Error definitions |
---|---|---|
HAT_CLIENT_VALIDATION | HAT_DOMAIN_IS_UNDEFINED |
hatDomain parameter is required |
HAT_CLIENT_VALIDATION | RECORD_IDS_MISSING |
recordsIds array parameter is empty or null |
HAT_CLIENT_VALIDATION | APPLICATION_NOT_SUPPORTED | application is not supported |
HAT_CLIENT_VALIDATION | NOT_AUTHENTICATED | client is not authenticated |
HAT_TOKEN_VALIDATION | HAT_TOKEN_IS_NOT_VALID_OR_EXPIRED | Authentication token has expired or is not valid |
HAT_TOKEN_VALIDATION | HAT_TOKEN_IS_UNDEFINED | Authentication token is undefined |
HAT_TOKEN_VALIDATION | HAT_TOKEN_FAILED_TO_DECODE | Authentication token has failed to decode |
HAT_API_EXCEPTION | HTTP_RESPONSE_FAILED | HTTP response failed |
HAT_FILE_API_EXCEPTION | FILE_IS_UNDEFINED | File parameter is undefined |
HAT_FILE_API_EXCEPTION | FAILED_TO_FETCH_METADATA | Failed to fetch HAT File metadata |
HAT_FILE_API_EXCEPTION | FILE_FAILED_TO_UPLOAD | Failed to upload the file to AWS |
FAQ
Why do I get CORS errors?
- Make sure that you set the localhost port to 3000, and you use a testing HAT. eg. testing.hubat.net
- You are using a production HAT. Localhost is not allowed origin for the production HATs.
- The secure property in the configuration is set to
false
. Only if you want to run the HAT locally, you have to set this field tofalse
. Otherwise, for the test environment it must betrue
.
I'm getting a 403: Access Denied, how do I fix it?
- Make sure you use the correct App ID and namespace. Note: The testing App ID
has a
-dev
suffix even if it's not displayed correctly in the Developer Portal. - In order for an application to fetch the list of applications or a specific application, it needs an extra permission.
- You are trying to write data to a different namespace.
Why do I get 400: Bad request?
- Make sure you use the
secure
configuration correctly. Only if you want to run the HAT locally, you have to set this field tofalse
. - The HAT doesn't allow to create duplicate data.
License
This work is licensed under the Mozilla Public License Version 2.0. Please read the LICENSE file for further details.