2024 04 16 creating a simple terminal game with xterm.js - bizkite-co/handterm GitHub Wiki

original file name: Codeium Chat - RvtH8YsxMH2XCXoqNJ20KF2zmBlZrJFL.md summary: The user wants to create a simple terminal game in the browser using xterm.js. I provided guidance on setting up a basic input/output mechanism to handle user commands within the terminal, along with a sample script to demonstrate how to process commands like "start" and "help" in the game. The user can enhance this setup by adding more game logic to create a fully interactive typing game experience. date: 2024-04-16T22:46

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User at 10:46 pm, Apr 16, 2024

I would like to start creating a very simple terminal game in the browser on this page by using xterm.js. This will start out as just a proof of concept so that I can try out some text-based interaction that I will develop into a terminal-based typing game in the browser. Can you help me get started with that?

Codeium at 10:46 pm, Apr 16, 2024

Absolutely! Since you're using xterm.js, you can create an interactive terminal session right in the browser. Here's a simple example to get you started with a text-based game. We'll set up a basic input/output mechanism where the user can type commands, and the terminal will respond accordingly.

Firstly, ensure that xterm.js is included in your HTML file as you have done, and then initialize the terminal. You've already got that part in your code. Now, let's add an event listener to handle user input and create a simple game loop that will check the commands entered by the user.

You can add the following code to the script section of your layouts/shortcodes/terminal.html page:

<script>
    var term = new window.Terminal({
        cursorBlink: true,
        cursorStyle: 'underline',
        fontSize: 14,
        fontFamily: 'Menlo, "DejaVu Sans Mono", "Lucida Console", monospace',
    });

    // Initialize a shell prompt variable
    var shellPrompt = '$ ';

    function runFakeTerminal() {
        if (term._initialized) {
            return;
        }

        term._initialized = true;

        // Open the terminal in the #terminal element
        term.open(document.getElementById('terminal'));

        // Write the shell prompt
        term.write('\r\n' + shellPrompt);

        // Add an event listener to handle user input
        term.onKey(e => {
            const keyCode = e.domEvent.keyCode;
            const printable = !e.domEvent.altKey && !e.domEvent.ctrlKey && !e.domEvent.metaKey;

            // Handle keys
            if (keyCode === 13) { // Enter key
                // Here you can process the command
                term.write('\r\n'); // Move to the next line
                processCommand(term._input);
                term._input = ''; // Reset the input
                term.write(shellPrompt); // Display the prompt again
            } else if (keyCode === 8) { // Backspace key
                // Do not delete the prompt
                if (term._cursorX > 2) {
                    term.write('\b \b');
                    if (term._input.length > 0) {
                        term._input = term._input.substr(0, term._input.length - 1);
                    }
                }
            } else if (printable) {
                term._input = term._input + e.key;
                term.write(e.key);
            }
        });
    }

    function processCommand(input) {
        const command = input.trim().toLowerCase();
        if (command === 'start') {
            term.writeln('Starting the game...');
            // Start game logic
        } else if (command === 'help') {
            term.writeln('Commands:');
            term.writeln('  start - Start the game');
            term.writeln('  help - Show this help message');
            // Add more commands and help text as needed
        } else {
            term.writeln('Unknown command: ' + command);
        }
    }

    // Initialize the terminal game when the DOM is ready
    document.addEventListener('DOMContentLoaded', runFakeTerminal);
</script>

This script sets up a simple command line interface within the terminal. When the user types "start", it prints a message saying the game is starting. When the user types "help", it lists available commands. For any other input, it reports an unknown command.

You can expand on processCommand function to add more game logic and create a more interactive experience.

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