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sketch of tcp socket repl - modification of original udp repl-client.javascript
// based on original udp repl-client.javascript
const net = require('net');
const readline = require('readline');
const client = new net.Socket();
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
const arcadiaPort = process.argv[2] || 5555;
// XXX: Unity Editor on Linuxen listens on tcp4 5555, so
// 127.0.0.1 is not a good idea there...
//const arcadiaHost = process.argv[3] || "127.0.0.1";
const arcadiaHost = process.argv[3] || "::1";
var input = "";
client.connect(arcadiaPort, arcadiaHost, () => {
rl.on('line', (cmd) => {
// always grow input
input += cmd + "\n";
if (parenthesesAreBalanced(input)) {
// send balanced form to server
client.write(input);
// reset input
input = "";
// pause prompt until message event
rl.pause();
}
});
rl.on('close', () => {
process.exit(0);
});
client.on('data', (data) => {
var msg = data.toString();
var msgLines = msg.split("\n");
// set last line as prompt
rl.setPrompt(msgLines.pop());
// display all other lines
console.log(msgLines.join("\n"));
// result prompt
rl.prompt();
});
client.on('ready', () => {
// send header form to start prompt
client.write('(binding [*warn-on-reflection* false] (do (println "; Arcadia REPL") (println (str "; Clojure " (clojure-version))) (println (str "; Unity " (UnityEditorInternal.InternalEditorUtility/GetFullUnityVersion))) (println (str "; Mono " (.Invoke (.GetMethod Mono.Runtime "GetDisplayName" (enum-or System.Reflection.BindingFlags/NonPublic System.Reflection.BindingFlags/Static)) nil nil)))))');
});
});
// http://codereview.stackexchange.com/questions/45991/balanced-parentheses
function parenthesesAreBalanced(s) {
var parentheses = "[]{}()",
stack = [], // Parentheses stack
i, // Index in the string
c; // Character in the string
for (i = 0; c = s[i++];) {
var bracePosition = parentheses.indexOf(c),
braceType;
// ~ is truthy for any number but -1
if (!~bracePosition) {
continue;
}
braceType = bracePosition % 2 ? 'closed' : 'open';
if (braceType === 'closed') {
// If there is no open parenthese at all, return false OR
// if the opening parenthese does not match ( they should be neighbours )
if (!stack.length ||
(parentheses.indexOf(stack.pop()) != bracePosition - 1)) {
return false;
}
} else {
stack.push(c);
}
}
// If anything is left on the stack <- not balanced
return !stack.length;
}
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