338 lines
10 KiB
JavaScript
338 lines
10 KiB
JavaScript
var Transform = require("stream").Transform;
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var EventEmitter = require("events").EventEmitter;
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/**
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* A Transform Stream implementation that output full VNB protocol messages
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*
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* @constructor
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* @this {VNBMessageParser}
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*/
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function VNBMessageTransform(opts) {
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"use strict";
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Transform.call(this,opts);
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var buffer;
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/**
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* Transform stream Write implementation
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* @param {string} data Upstream data already converted as string
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* @param {string} encoding String encoding (should be utf8, but should be checked upward)
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* @param {function} callback Downstream Stream receiving only full VNB messages
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**/
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this._transform = function(data, encoding, callback) {
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var endpos = data.indexOf("\n");
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if (endpos > -1) {
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if (buffer !== undefined) {
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this.push(buffer);
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buffer = undefined;
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}
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if (endpos > 0) {
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this.push(data.substr(0, endpos));
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}
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callback();
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if (endpos < data.length - 1) {
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buffer = data.substr(endpos + 1);
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}
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}
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else {
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buffer = buffer.concat(data);
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}
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};
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/**
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* Flush still data. Remaining data is lost since it can only be an incomplete message
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* @param {function} callback Callback to call when data has been flushed
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**/
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this._flush = function (callback) {
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buffer = undefined;
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callback();
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};
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}
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/**
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* Authentication callback
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* @callback authenticationCallback
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* @param {string} password Password given by the authenticating client
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* @return {bool} Result of the authentication
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*/
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/**
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* VNB Client implementation (communication from vim to the netbeans server)
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* @constructor
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* @this {VNBMessageClient}
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* @param {Socket} socket Incomming stream
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* @param {authenticationCallback} authentication Callback function called when the AUTH message is received
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*/
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function VNBClient(socket, authentication) {
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"use strict";
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EventEmitter.call(this);
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var self = this;
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var callbacks = new Map();
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var currentSeqno = 0;
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var connected = false;
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//TODO check if this is needed
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socket.setEncoding("utf8");
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var messageTransform = new VNBMessageTransform();
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messageTransform.on("data",function (message) {
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//The first message must be an authentication one
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if (message.startsWith("AUTH ") && authentication(message.substring(message.indexOf(" ") + 1))) {
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connected = true;
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messageTransform.removeAllListeners("data");
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messageTransform.on("data", function(message) {
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try {
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var iName = 0; //Index of the name separator in case of an Event
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var iSeqno = 0; //Index of the seqno separator in case of an Event
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//Header of the message
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for (var i = 0 ; i < message.length && message[i] !== " "; ++i) {
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if (message[i] === ":") {
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iName = i;
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}
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else if (message[i] === "=") {
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iSeqno = i;
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}
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}
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var isEvent = false;
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var args = [];
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var seqno = 0;
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if (iName > 0 && iSeqno > 0) {
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isEvent = true;
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args.push("event");
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args.push(Number.parseInt(message.substr(0, iName), 10));
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args.push(message.substring(iName + 1, iSeqno));
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//args.push(Number.parseInt(message.substring(iSeqno + 1, i), 10));
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}
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else if (iName === 0 && iSeqno === 0) {
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seqno = Number.parseInt(message.substr(0, i), 10);
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}
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else {
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throw "Unknown message type";
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}
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var argStartOffset = ++i;
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//Arguments of the message
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for ( ; i < message.length ; ++i) {
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if (message[i] === "\"" || message[i] === "!") {
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var parsedString = "";
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i += 1;
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while (i < message.length && message[i] !== "\"") {
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if (message[i] === "\\") {
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i += 1;
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if (i < message.length) {
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throw "Unfinished string in message";
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}
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else {
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switch (message[i]) {
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case "n" :
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parsedString += "\n";
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break;
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case "\\" :
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parsedString += "\\";
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break;
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case "\"" :
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parsedString += "\"";
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break;
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case "r" :
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parsedString += "\r";
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break;
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case "t" :
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parsedString += "\t";
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break;
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default :
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throw "Invalid escaped character in string";
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}
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}
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}
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else {
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parsedString += message[i];
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}
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++i;
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}
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args.push(parsedString);
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i += 1;
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}
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else {
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while (i < message.length && message[i] !== " ") {
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i += 1;
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}
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if (i - argStartOffset === 1 && (message[i] === "T" || message[i] === "F")) {
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args.push(message[i] === "T");
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}
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else {
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var argument = message.substr(argStartOffset, i);
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if (Number.NaN(argument)) {
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if (argument.contains("/")) {
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args.push(argument.split("/"));
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}
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else {
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args.push(argument);
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}
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}
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else {
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args.push(Number.parseInt(argument));
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}
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}
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}
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}
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if (isEvent) {
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//Emit the event
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self.emit(...args);
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}
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else if (callbacks.has(seqno)) {
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callbacks.get(seqno)(...args);
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callbacks.delete(seqno);
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}
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else {
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throw "Received reply to unknown function call";
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}
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}
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catch (ex) {
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self.emit("error", ex.message);
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}
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});
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}
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else {
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//TODO send a message to client ?
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socket.end();
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}
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});
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messageTransform.on("error", function (error) {
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});
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messageTransform.on("end",function () {
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});
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messageTransform.on("close", function () {
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});
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/**
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* @function sendCommand
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* Send a command message
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* @param {string} name Name of the command
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* @param {number} buffer Name of the buffer
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* @param {...string} arguments Parameters of the command
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*/
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function sendCommand(name, buffer) {
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let seqno = currentSeqno;
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currentSeqno += 1;
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var data = buffer + ":" + name + ":" + seqno;
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for (var i = 2 ; i < arguments.length ; ++i) {
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data += " " + arguments[i];
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}
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data += "\n";
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socket.write(data);
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}
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/**
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* @function callFunction
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* Send a function message
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* @param {string} name Name of the function
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* @param {number} buffer ID of the buffer
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* @param {...string} arguments Parameters of the function. Use the string, bool, color and position function
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* of the method to convert javascript types to string
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* @param {function} callback Callback function called with reply value
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* */
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function callFunction (name, buffer) {
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let seqno = currentSeqno;
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currentSeqno += 1;
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var lastArg = arguments.length - 1;
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//If the function is called with a callback (wich should always be the case)
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//add the calback to the map so it's fired when the reply is received
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if (typeof(arguments[lastArg]) === "function") {
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callbacks[currentSeqno] = arguments[lastArg];
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lastArg -= 1;
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}
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var data = buffer + ":" + name + "/" + seqno;
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for (var i = 2 ; i < lastArg ; ++i) {
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data += " " + arguments[i];
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}
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data += "\n";
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socket.write(data);
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}
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socket.pipe(messageTransform);
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/* GLOBAL COMMANDS */
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var startAtomic = function () {
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};
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var endAtomic = function() {
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};
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var raise = function () {
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};
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var setExitDelay = function (secondes) {
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};
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var specialKeys = function () {
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};
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var create = function() {
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};
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var editFile = function (pathName){
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};
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/* GLOBAL FUNCTIONS */
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var saveAndExit = function (callback) {
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};
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var getModified = function (callback) {
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};
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}
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VNBClient.prototype = EventEmitter;
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