index.js

var request = require('request');

var config = {
	pocketUrl: {
		request: 'https://getpocket.com/v3/oauth/request',
		authorize: 'https://getpocket.com/v3/oauth/authorize',
		get: 'https://getpocket.com/v3/get',
		add: 'https://getpocket.com/v3/add',
		modify: 'https://getpocket.com/v3/send'
	},
	headers: {
		'content-type': 'application/x-www-form-urlencoded',
		'X-Accept': 'application/json'
	}
};

var getRequestToken = function (key, callback) {

	var options = {
		headers: config.headers,
		body: 'consumer_key=' + key + '&redirect_uri=pocketapp1234:authorizationFinished',
		url: config.pocketUrl.request
	};

	request.post(options, function (error, response, body) {
		callback(JSON.parse(body));
	});
};

var getAccessToken = function (key, requestToken, callback) {

	var options = {
		headers: config.headers,
		url: config.pocketUrl.authorize,
		body: 'consumer_key=' + key + '&code=' + requestToken + '&redirect_uri=pocketapp1234:authorizationFinished'
	};

	request.post(options, function (error, response, body) {
		callback(JSON.parse(body));
	});

};

var getArticles = function (key, accessToken, params, callback) {

	if (!callback) {
		callback = params;
		params = {};
	}

	var options = {
		headers: config.headers,
		url: config.pocketUrl.get,
		body: 'consumer_key=' + key + '&access_token=' + accessToken
	};

	for (var prop in params) {
		// skip loop if the property is from prototype
		if (!params.hasOwnProperty(prop)) continue;
		options.body += '&' + prop + '=' + params[prop];
	}

	request.post(options, function (error, response, body) {
		completePost(error, response, body, callback);
	});

};

var addArticles = function (addurl, key, accessToken, callback) {

	var options = {
		headers: config.headers,
		url: config.pocketUrl.add,
		body: 'url=' + addurl + '&consumer_key=' + key + '&access_token=' + accessToken
	};

	request.post(options, function (error, response, body) {
		completePost(error, response, body, callback);
	});

};

var modifyArticles = function (actions, key, accessToken, callback) {

	actions = JSON.stringify(actions);

	var options = {
		headers: config.headers,
		url: config.pocketUrl.modify,
		body: 'actions=' + encodeURIComponent(actions) + '&consumer_key=' + key + '&access_token=' + accessToken
	};

	request.post(options, function (error, response, body) {
		completePost(error, response, body, callback);
	});

};

function completePost(error, response, body, callback) {
	if (error) {
		callback(error, null);
	} else if (response.headers.hasOwnProperty('x-error')) {
		callback(response.headers['x-error'], null);
	} else {
		callback(null, JSON.parse(body));
	}
}

module.exports = {
	getRequestToken: getRequestToken,
	getAccessToken: getAccessToken,
	getArticles: getArticles,
	addArticles: addArticles,
	modifyArticles: modifyArticles
};