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68 lines
2.3 KiB
JavaScript
68 lines
2.3 KiB
JavaScript
/**
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* Print multible strings to the terminal.
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* Strings get concatinated (add together) without any space betweent them.
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* There will be no newline at the end!
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* If you want a linebrak at the end use `println`.
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*
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* This function is normally used if you want to put something on the screen
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* and later add some content to the same line.
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* For normal output (similar to `console.log`) use `println`!
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*
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* @param {...string} messages - the strings to print to the terminal.
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*/
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export function print(...messages) {
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process.stdout.write(messages.join(""));
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}
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/**
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* Add multible strings as a new line to the terminal.
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* Strings get concatinated (add together) without any space betweent them.
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* There will be a newline at the end!
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* If you want the terminal to stay active on the current line use `print`.
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*
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* @param {...any} messages - the strings to print to the terminal.
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*/
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export function println(...messages) {
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process.stdout.write(messages.join("") + "\n");
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}
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/**
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* Create an empty string with a given length
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*
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* @param {number} length - the length of the string in space-characters.
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* @returns {string} returns a string containing only ampty spaces with a length of `count`.
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*/
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export function tab(length) {
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return " ".repeat(length);
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}
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/**
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* Read input from the keyboard and return it as a string.
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* TODO: to would be very helpfull to only allow a certain class of input (numbers, letters)
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* TODO: also we could convert all inputs to uppercase (where it makes sence).
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*
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* @param {string=''} message - a message or question to print befor the input.
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* @returns {Promise<string>} - returns the entered text as a string
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* @async
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*/
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export async function input(message = '') {
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/* First we need to print the mesage
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* We append a space by default to seperate the message from the imput.
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* TODO: If the message already contains a space at the end this is not needed! */
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process.stdout.write(message + ' ');
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return new Promise(resolve => {
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process.stdin.on('data', (input) => {
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/* onData returns a Buffer.
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* First we need to convert it into a string. */
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const data = input.toString();
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/* The result fo onData is a string ending with an `\n`.
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* We just need the actual content so let's remove the newline at the end: */
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const content = data[data.length] === '\n' ? data.slice(0, -1) : data;
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resolve(content);
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});
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});
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}
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