service-model/messageHeaders.js

An object oriented web service framework inspired by Windows Communication Foundation.

/**
 * Represents a collection of headers for a [[Message]].
 */
var MessageHeaders = (function () {
    /**
     * Constructs a MessagesHeaders object.
     * @param headers Object map of headers. *Header keys must be lowercase.*
     */
    function MessageHeaders(headers) {
        this._headers = headers;
    }
    /**
     * Gets a header.
     * @param name The case insensitive name of the header.
     */
    MessageHeaders.prototype.get = function (name) {
        if (!this._headers)
            return;
        return this._headers[name.toLowerCase()];
    };
    /**
     * Sets a header.
     * @param name The case insensitive name of the header.
     * @param value The value of the header.
     */
    MessageHeaders.prototype.set = function (name, value) {
        if (!this._headers) {
            this._headers = {};
        }
        this._headers[name.toLowerCase()] = value;
    };
    /**
     * Returns true if the collection contains the header; otherwise, returns false.
     * @param name The case insensitive name of the header.
     */
    MessageHeaders.prototype.has = function (name) {
        if (!this._headers)
            return false;
        return !!this._headers[name.toLowerCase()];
    };
    /**
     * Deletes a header.
     * @param name The case insensitive name of the header.
     */
    MessageHeaders.prototype.delete = function (name) {
        if (!this._headers)
            return;
        delete this._headers[name.toLowerCase()];
    };
    /**
     * Merges in the messages headers, overwriting any existing headers.
     * @param headers The headers to merge
     */
    MessageHeaders.prototype.merge = function (headers) {
        var obj = headers.toObject();
        if (obj) {
            if (!this._headers) {
                this._headers = {};
            }
            for (var name in obj) {
                if (obj.hasOwnProperty(name)) {
                    // skip using `this.set`, since headers are coming from a MessageHeaders object we know that all
                    // the keys will be lowercase
                    this._headers[name] = obj[name];
                }
            }
        }
    };
    /**
     * Returns the headers as an object map. Will return `undefined` if no headers have been set.
     */
    MessageHeaders.prototype.toObject = function () {
        if (this._headers) {
            return this._headers;
        }
    };
    return MessageHeaders;
})();
exports.MessageHeaders = MessageHeaders;