cloudcms

cloudcms-javascript-driver

Updated Cloud CMS JS Driver using modern ECMAScript and Promises

Installation

npm install --save cloudcms

Usage

This methods in this driver support the following patterns of usage:

1. Async / Await
2. Promises
3. Callbacks

You're free to mix and match between these approaches as you see fit.

Here are examples of each:

Async / Await

const cloudcms = require("cloudcms");

const apiKeys = {
    "clientKey": "",
    "clientSecret": "",
    "username": "",
    "password": ""    
};

var repositoryId = "f49e621853c33f501377";
var branchId = "master";
var nodeId = "821c40ab613d9b5bcbbc656b62229332";

(async function() {

    var session = await cloudcms.connect(apiKeys);
        
    // read node
    var node = await session.readNode(repositoryId, branchId, nodeId);
    
    // log result
    console.log("Found node:" + node.title);
})();

Promises

const cloudcms = require("cloudcms");

const apiKeys = {
    "clientKey": "",
    "clientSecret": "",
    "username": "",
    "password": ""    
};

var repositoryId = "f49e621853c33f501377";
var branchId = "master";

cloudcms.connect(apiKeys).then(function(session) {

    // read node   
    session.readNode(repositoryId, branchId, nodeId).then(function(node) {
    
        // log result
        console.log("Found node:" + node.title);    
    });

});

Callbacks

const cloudcms = require("cloudcms");

const apiKeys = {
    "clientKey": "",
    "clientSecret": "",
    "username": "",
    "password": ""    
};

var repositoryId = "f49e621853c33f501377";
var branchId = "master";

cloudcms.connect(apiKeys, function(err, session) {

    // read node   
    session.readNode(repositoryId, branchId, nodeId, function(err, node) {
    
        // log result
        console.log("Found node:" + node.title);    
    });

});

API Keys

You can either pass in your API Keys object to the connect() method or you can have the driver pick up the API keys from the following files in the local directory:

• gitana.json
• cloudcms.json

For example, the following code will simply read from disk:

const cloudcms = require("cloudcms");

var repositoryId = "f49e621853c33f501377";
var branchId = "master";
var nodeId = "821c40ab613d9b5bcbbc656b62229332";

(async function() {

    var session = await cloudcms.connect();
        
    // read node
    var node = await session.readNode(repositoryId, branchId, nodeId);
    
    // log result
    console.log("Found node:" + node.title);
})();

Custom Session

You can supply your own session implementations to add your own methods.

Define your session class:

var DefaultSession = require("cloudcms/session/default/session");

class CustomSession extends DefaultSession
{
    /**
     * Creates an article.
     *
     * @param repository
     * @param branch
     * @param obj
     */
    createArticle(repository, branch, obj)
    {
        var callback = this.extractOptionalCallback(arguments);
    
        if (!obj) {
            obj = {};
        }
        
        obj._type = "my:article";
        
        // call through to the createNode method on the default session
        return this.createNode(repository, branch, obj, callback);
    }
}

module.exports = CustomSession;

This extends the session object with a new method called createArticle.

And then do the following to use it:

const cloudcms = require("cloudcms");

(async function() {

    var customSession = require("custom-session");
    cloudcms.session(customSession);

    var session = await cloudcms.connect();
    
    var article = await session.createArticle(repository, branch, { "title": "Hello World" });

})();

If you want to add a new asynchronous method that adhere to the session's async support for callbacks, Promises and/or await/async, you can use the Helper.sessionFunction method like this:

var DefaultSession = require("cloudcms/session/default/session");
var Helper = require("cloudcms/helper");

class CustomSession extends DefaultSession
{
    test()
    {
        // use the Helper.sessionFunction method to support Promise, callback or async/await
        // put your work into the finish method
        return Helper.sessionFunction.call(this, arguments, function(finish) {
            return setTimeout(function() {
                finish(null, 101);
            }, 250);
        });
    }
}

module.exports = CustomSession;

Custom Storage

TODO: how to configure Memory vs Redis

Custom Driver

TODO: how to configure a custom driver (XHR, etc)

Custom Cache

TODO: how to configure custom caching for JSON responses

Session

When a session connects, it maintains an Access Token and a Refresh Token. The Access Token is passed as a bearer token via the Authorization header. If the Access Token expires, the Refresh Token is used to acquire a new Access Token.

Automatic Reauthentication

If the Refresh Token expires, you will need to re-authenticate.

You can set this up to happen automatically by using the reauthenticate method, like this:

session = await cloudcms.connect();

session.reauthenticate(function(done) {

    // re-connect and use the done() function to pass back the new session
    cloudcms.connect(function(err, newSession) {
        done(err, newSession);
    });
});

Manually refresh the Access Token

You can manually refresh the access token (using your Refresh Token) like this:

await session.refresh();

Expire the Access / Refresh Token

You can also manually expire the issued Access and Refresh Token, like this:

await session.disconnect();

TypeScript

The cloudcms-javascript-driver includes a TypeScript type interface to improve your editing experience and allow better integration in your TypeScript apps. Here's a quick example usage:

import { DriverConfig, DefaultSession, PlatformObject, Rows } from 'cloudcms';
import * as CloudCMS from 'cloudcms';

async function myRequest(): Promise<void> {
    var config: DriverConfig = {
        // ...
    };

    var session: DefaultSession = await CloudCMS.connect(config);

    var repositoryId = "myRepo";
    var branchId = "master";

    var nodes: Rows<Node> = await session.queryNodes(repositoryId, branchId, { "author": "Kurt Vonnegut" });
    nodes.rows.forEach((obj) => {
        console.log(obj._doc);
    })
}

myRequest();

You can also provide custom generic types to methods involving nodes to further describe returned node types in your TypeScript application:

import { Node, Rows } from 'cloudcms';

interface CustomType extends Node {
    title: String,
    aProp: String,
    bProp: String
}

const results: Rows<CustomType> = await session.queryNodes(repositoryId, branchId, { "_type": "custom:type" });

Tests

This library uses Mocha and Chai for testing.

To run all tests:

npm run alltests

To run a single test (node):

npm run test node