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chore: Restructure keyboard reading.

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This commit is contained in:
greysoh 2024-05-06 14:22:57 -04:00
parent c25e7badcd
commit 41d37048d2
Signed by: imterah
GPG key ID: 8FA7DD57BA6CEA37
1 changed files with 81 additions and 70 deletions
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123
lom/src/index.ts
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@ -18,6 +18,66 @@ const axios = baseAxios.create({
},
});
async function readFromKeyboard(stream: ssh2.ServerChannel): Promise<any> {
let line = "";
let lineIndex = 0;
let isReady = false;
async function eventLoop(): Promise<any> {
const readStreamData = stream.read();
if (readStreamData == null) return setTimeout(eventLoop, 5);
if (readStreamData.includes("\r") || readStreamData.includes("\n")) {
line = line.replace("\r", "");
isReady = true;
return;
} else if (readStreamData.includes("\x7F")) {
// \x7F = Ascii escape code for backspace (client side)
if (line == "" || line == "\r") return setTimeout(eventLoop, 5);
line = line.substring(0, line.length - 1);
// Ascii escape code for backspace (server side)
stream.write("\u0008 \u0008");
} else if (readStreamData.includes("\x1B")) {
const leftEscape = "\x1B[D";
const rightEscape = "\x1B[C";
if (readStreamData.includes(rightEscape)) {
if (lineIndex + 1 > line.length) return setTimeout(eventLoop, 5);
lineIndex += 1;
} else if (readStreamData.includes(leftEscape)) {
if (lineIndex - 1 < 0) return setTimeout(eventLoop, 5);
lineIndex -= 1;
} else {
return setTimeout(eventLoop, 5);
}
stream.write(readStreamData);
} else {
lineIndex += readStreamData.length;
// There isn't a splice method for String prototypes. So, ugh:
line = line.substring(0, lineIndex - 1) + readStreamData + line.substring(lineIndex + readStreamData.length, line.length);
stream.write(readStreamData);
}
setTimeout(eventLoop, 5);
}
// Yes, this is bad practice. Currently, I don't care.
return new Promise(async(resolve) => {
eventLoop();
while (!isReady) {
await new Promise((i) => setTimeout(i, 5));
}
resolve(line);
});
};
try {
keyFile = await readFile("../keys/host.key");
} catch (e) {
@ -77,83 +137,34 @@ server.on("connection", client => {
"Welcome to NextNet LOM. Run 'help' to see commands.\r\n\r\n~$ ",
);
let line = "";
let lineIndex = 0;
function println(...str: string[]) {
stream.write(str.join(" ").replace("\n", "\r\n"));
}
};
async function eventLoop(): Promise<any> {
const readStreamData = stream.read();
if (readStreamData == null) return setTimeout(eventLoop, 5);
if (readStreamData.includes("\r") || readStreamData.includes("\n")) {
line = line.replace("\r", "");
if (line == "") {
stream.write(`\r\n~$ `);
return setTimeout(eventLoop, 5);
}
while (true) {
const line = await readFromKeyboard(stream);
stream.write("\r\n");
if (line == "") continue;
const argv = parseArgsStringToArgv(line);
line = "";
lineIndex = 0;
if (argv[0] == "exit") {
stream.close();
} else {
stream.write("\r\n");
const command = commands.find(i => i.name == argv[0]);
if (!command) {
stream.write(
`Unknown command ${argv[0]}. Run 'help' to see commands.\r\n~$ `,
);
return setTimeout(eventLoop, 5);
continue;
}
await command.run(argv, println, axios, token);
stream.write(`~$ `);
}
} else if (readStreamData.includes("\x7F")) {
// \x7F = Ascii escape code for backspace (client side)
if (line == "" || line == "\r") return setTimeout(eventLoop, 5);
line = line.substring(0, line.length - 1);
// Ascii escape code for backspace (server side)
stream.write("\u0008 \u0008");
} else if (readStreamData.includes("\x1B")) {
const leftEscape = "\x1B[D";
const rightEscape = "\x1B[C";
if (readStreamData.includes(rightEscape)) {
if (lineIndex + 1 > line.length) return setTimeout(eventLoop, 5);
lineIndex += 1;
} else if (readStreamData.includes(leftEscape)) {
if (lineIndex - 1 < 0) return setTimeout(eventLoop, 5);
lineIndex -= 1;
} else {
return setTimeout(eventLoop, 5);
}
stream.write(readStreamData);
} else {
lineIndex += readStreamData.length;
// There isn't a splice method for String prototypes. So, ugh:
line = line.substring(0, lineIndex - 1) + readStreamData + line.substring(lineIndex + readStreamData.length, line.length);
console.log(line);
stream.write(readStreamData);
}
setTimeout(eventLoop, 5);
}
eventLoop();
});
});
});