62 lines
1.9 KiB
JavaScript
62 lines
1.9 KiB
JavaScript
function cmd_help() {
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// Display 'help' message
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return "Commands list:<br>" +
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" -about Information about this website<br>"+
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" -clear Clear terminal screen<br>" +
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" -history Displays the command history of this session<br>" +
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" -exec Execute arbitrary math and logic equations";
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}
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function cmd_about() {
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// Display 'about' message
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return "This website is based on the general idea and design of a terminal.<br>" +
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"It serves the purpose of a homepage. It exists just for the fun of creating it.";
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}
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function cmd_clear() {
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// Clear terminal by reloading page
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window.location.reload();
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return "";
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}
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function cmd_history() {
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// Display the command history line by line
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let output = "";
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const hl = history.list;
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for (let i = 0; i < hl.length; i++) {
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const lineBreak = (i !== hl.length - 1) ? "<br>" : "";
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output += `${i+1} ${hl[i]}${lineBreak}`;
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}
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return output;
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}
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function cmd_exec(input) {
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// No input was given
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if (input === undefined)
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return "You must enter parameters!";
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// Input contains letters or invalid characters
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const str = input.join(' ');
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if (/[',:;a-zA-Z]/.test(str) || str === "")
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return "Invalid input!";
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// Input is inside of character range with exceptions
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const chars = str.split('').filter(e => {
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const code = e.charCodeAt(0);
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const s = code === 32;
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const a = code > 36;
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const b = code < 63;
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const c = code === 94;
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const d = code === 124;
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return !(s || a && b || c || d);
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});
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// If exceptions remain, invalid input was given
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if (chars.length > 0)
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return "Invalid input!";
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// Execute input and return output
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return (new Function(`return ${str}`))().toString();
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}
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function cmd_echo(input) {
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return input.join(' ');
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} |