283 lines
7.8 KiB
JavaScript
283 lines
7.8 KiB
JavaScript
'use strict';
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var urllib = require('url');
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var util = require('util');
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var fs = require('fs');
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var fetch = require('nodemailer-fetch');
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/**
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* Parses connection url to a structured configuration object
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*
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* @param {String} str Connection url
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* @return {Object} Configuration object
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*/
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module.exports.parseConnectionUrl = function (str) {
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str = str || '';
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var options = {};
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[urllib.parse(str, true)].forEach(function (url) {
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var auth;
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switch (url.protocol) {
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case 'smtp:':
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options.secure = false;
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break;
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case 'smtps:':
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options.secure = true;
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break;
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case 'direct:':
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options.direct = true;
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break;
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}
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if (!isNaN(url.port) && Number(url.port)) {
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options.port = Number(url.port);
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}
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if (url.hostname) {
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options.host = url.hostname;
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}
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if (url.auth) {
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auth = url.auth.split(':');
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if (!options.auth) {
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options.auth = {};
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}
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options.auth.user = auth.shift();
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options.auth.pass = auth.join(':');
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}
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Object.keys(url.query || {}).forEach(function (key) {
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var obj = options;
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var lKey = key;
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var value = url.query[key];
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if (!isNaN(value)) {
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value = Number(value);
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}
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switch (value) {
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case 'true':
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value = true;
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break;
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case 'false':
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value = false;
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break;
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}
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// tls is nested object
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if (key.indexOf('tls.') === 0) {
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lKey = key.substr(4);
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if (!options.tls) {
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options.tls = {};
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}
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obj = options.tls;
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} else if (key.indexOf('.') >= 0) {
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// ignore nested properties besides tls
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return;
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}
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if (!(lKey in obj)) {
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obj[lKey] = value;
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}
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});
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});
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return options;
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};
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/**
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* Returns a bunyan-compatible logger interface. Uses either provided logger or
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* creates a default console logger
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*
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* @param {Object} [options] Options object that might include 'logger' value
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* @return {Object} bunyan compatible logger
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*/
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module.exports.getLogger = function (options) {
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options = options || {};
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if (!options.logger) {
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// use vanity logger
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return {
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info: function () {},
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debug: function () {},
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error: function () {}
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};
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}
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if (options.logger === true) {
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// create console logger
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return createDefaultLogger();
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}
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// return whatever was passed
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return options.logger;
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};
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/**
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* Wrapper for creating a callback than either resolves or rejects a promise
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* based on input
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*
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* @param {Function} resolve Function to run if callback is called
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* @param {Function} reject Function to run if callback ends with an error
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*/
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module.exports.callbackPromise = function (resolve, reject) {
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return function () {
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var args = Array.prototype.slice.call(arguments);
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var err = args.shift();
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if (err) {
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reject(err);
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} else {
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resolve.apply(null, args);
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}
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};
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};
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/**
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* Resolves a String or a Buffer value for content value. Useful if the value
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* is a Stream or a file or an URL. If the value is a Stream, overwrites
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* the stream object with the resolved value (you can't stream a value twice).
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*
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* This is useful when you want to create a plugin that needs a content value,
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* for example the `html` or `text` value as a String or a Buffer but not as
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* a file path or an URL.
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*
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* @param {Object} data An object or an Array you want to resolve an element for
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* @param {String|Number} key Property name or an Array index
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* @param {Function} callback Callback function with (err, value)
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*/
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module.exports.resolveContent = function (data, key, callback) {
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var promise;
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if (!callback && typeof Promise === 'function') {
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promise = new Promise(function (resolve, reject) {
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callback = module.exports.callbackPromise(resolve, reject);
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});
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}
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var content = data && data[key] && data[key].content || data[key];
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var contentStream;
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var encoding = (typeof data[key] === 'object' && data[key].encoding || 'utf8')
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.toString()
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.toLowerCase()
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.replace(/[-_\s]/g, '');
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if (!content) {
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return callback(null, content);
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}
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if (typeof content === 'object') {
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if (typeof content.pipe === 'function') {
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return resolveStream(content, function (err, value) {
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if (err) {
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return callback(err);
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}
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// we can't stream twice the same content, so we need
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// to replace the stream object with the streaming result
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data[key] = value;
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callback(null, value);
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});
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} else if (/^https?:\/\//i.test(content.path || content.href)) {
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contentStream = fetch(content.path || content.href);
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return resolveStream(contentStream, callback);
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} else if (/^data:/i.test(content.path || content.href)) {
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var parts = (content.path || content.href).match(/^data:((?:[^;]*;)*(?:[^,]*)),(.*)$/i);
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if (!parts) {
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return callback(null, new Buffer(0));
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}
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return callback(null, /\bbase64$/i.test(parts[1]) ? new Buffer(parts[2], 'base64') : new Buffer(decodeURIComponent(parts[2])));
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} else if (content.path) {
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return resolveStream(fs.createReadStream(content.path), callback);
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}
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}
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if (typeof data[key].content === 'string' && ['utf8', 'usascii', 'ascii'].indexOf(encoding) < 0) {
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content = new Buffer(data[key].content, encoding);
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}
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// default action, return as is
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setImmediate(callback.bind(null, null, content));
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return promise;
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};
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/**
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* Streams a stream value into a Buffer
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*
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* @param {Object} stream Readable stream
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* @param {Function} callback Callback function with (err, value)
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*/
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function resolveStream(stream, callback) {
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var responded = false;
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var chunks = [];
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var chunklen = 0;
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stream.on('error', function (err) {
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if (responded) {
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return;
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}
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responded = true;
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callback(err);
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});
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stream.on('readable', function () {
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var chunk;
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while ((chunk = stream.read()) !== null) {
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chunks.push(chunk);
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chunklen += chunk.length;
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}
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});
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stream.on('end', function () {
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if (responded) {
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return;
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}
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responded = true;
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var value;
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try {
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value = Buffer.concat(chunks, chunklen);
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} catch (E) {
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return callback(E);
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}
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callback(null, value);
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});
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}
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/**
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* Generates a bunyan-like logger that prints to console
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*
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* @returns {Object} Bunyan logger instance
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*/
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function createDefaultLogger() {
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var logger = {
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_print: function ( /* level, message */ ) {
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var args = Array.prototype.slice.call(arguments);
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var level = args.shift();
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var message;
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if (args.length > 1) {
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message = util.format.apply(util, args);
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} else {
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message = args.shift();
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}
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console.log('[%s] %s: %s',
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new Date().toISOString().substr(0, 19).replace(/T/, ' '),
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level.toUpperCase(),
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message);
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}
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};
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logger.info = logger._print.bind(null, 'info');
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logger.debug = logger._print.bind(null, 'debug');
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logger.error = logger._print.bind(null, 'error');
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return logger;
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}
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