postmailer/mapping.js

HTTP POST -> SMTP proxy, as Express middleware

var UriTemplate = require('uri-templates');

function Transform(obj) {
	var emailTemplate = UriTemplate(obj.email);
	var urlTemplates = [].concat(obj.urls || obj.url || []).map(UriTemplate);
	var name = obj.name;
	var restricted = obj.restricted;

	this.emailForUrl = function (url, includeRestricted) {
		if (!includeRestricted && restricted) return null;
		var urls = [].concat(url);
		for (var i = 0; i < urlTemplates.length; i++) {
			for (var j = 0; j < urls.length; j++) {
				var params = urlTemplates[i].fromUri(urls[j]);
				if (params) return emailTemplate.fill(params);
			}
		}
		return null;
	};
	this.urlsForEmail = function (email, includeRestricted) {
		if (!includeRestricted && restricted) return [];
		var params = emailTemplate.fromUri(email);
		if (params) return urlTemplates.map(function (template) {
			return template.fill(params);
		});
		return [];
	};
	this.nameForUrl = function (url, includeRestricted) {
		var email = this.emailForUrl(url, includeRestricted);
		if (!email) return null;
		if (typeof name === 'function') {
			return name(url, email);
		} else {
			return name || (url + "");
		}
	};
}
Transform.prototype = {};

function Mapping(transforms) {
	var transforms = [].concat(transforms).map(function (transform) {
		return new Transform(transform);
	});
	this.emailForUrl = function (url, mustBeOpen) {
		for (var i = 0; i < transforms.length; i++) {
			var email = transforms[i].emailForUrl(url, mustBeOpen);
			if (email) return email;
		}
		return null;
	};
	this.urlsForEmail = function (email, mustBeOpen) {
		var urls = [];
		for (var i = 0; i < transforms.length; i++) {
			urls = urls.concat(transforms[i].urlsForEmail(email, mustBeOpen));
		}
		return urls;
	};
	this.nameForUrl = function (url, mustBeOpen) {
		for (var i = 0; i < transforms.length; i++) {
			var name = transforms[i].nameForUrl(url, mustBeOpen);
			if (name) return name;
		}
		return null;
	};
}
Mapping.prototype = {};

module.exports = Mapping;