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import { useEffect, useRef } from 'react';
import { Link } from 'react-router';
import * as cw from 'cw';
import '../../base.css';
import './styles.css';
declare global {
interface Window {
cw: any;
}
}
const ChartPage = () => {
const actxRef = useRef<any>(null);
// Initialize audio context
const initAudio = () => {
if (actxRef.current) return; // Already initialized
try {
actxRef.current = cw.initAudioContext({ tone: 600 });
} catch (error) {
console.error('Failed to initialize audio context:', error);
}
};
// Play Morse code for a character
const playCharacter = (character: string) => {
// Initialize audio on first user interaction
if (!actxRef.current) {
initAudio();
}
if (actxRef.current) {
// Remove 'playing' class from all items
document.querySelectorAll('.morse-item').forEach(item => {
item.classList.remove('playing');
});
// Add 'playing' class to the clicked item
const clickedItem = document.querySelector(`.morse-item[data-char="${character}"]`);
if (clickedItem) {
clickedItem.classList.add('playing');
}
cw.play(character, {
wpm: 20,
actx: actxRef.current
});
// Remove the 'playing' class after the audio finishes
setTimeout(() => {
if (clickedItem) {
clickedItem.classList.remove('playing');
}
}, 2000);
}
};
// Add click event listeners to all morse items
useEffect(() => {
const handleMorseItemClick = (e: Event) => {
const target = e.currentTarget as HTMLElement;
const character = target.getAttribute('data-char');
if (character) {
playCharacter(character);
}
};
const morseItems = document.querySelectorAll('.morse-item');
morseItems.forEach(item => {
item.addEventListener('click', handleMorseItemClick);
});
return () => {
morseItems.forEach(item => {
item.removeEventListener('click', handleMorseItemClick);
});
};
}, []);
return (
<div className="container">
<h1><Link to="/" className="title-link">Morse Hero</Link></h1>
<h2>Morse Code Chart</h2>
<div className="chart-section">
<h2>Letters</h2>
<div className="morse-grid">
{[...'ABCDEFGHIJKLMNOPQRSTUVWXYZ'].map(char => (
<div key={char} className="morse-item" data-char={char}>
<div className="character">{char}</div>
<div className="morse">{getMorseCode(char)}</div>
</div>
))}
</div>
</div>
<div className="chart-section">
<h2>Numbers</h2>
<div className="morse-grid">
{[...'0123456789'].map(char => (
<div key={char} className="morse-item" data-char={char}>
<div className="character">{char}</div>
<div className="morse">{getMorseCode(char)}</div>
</div>
))}
</div>
</div>
<div className="chart-section">
<h2>Special Characters</h2>
<div className="morse-grid">
{[...'.=,?/'].map(char => (
<div key={char} className="morse-item" data-char={char}>
<div className="character">{char}</div>
<div className="morse">{getMorseCode(char)}</div>
</div>
))}
</div>
</div>
<div className="chart-section">
<h2>Prosigns</h2>
<div className="morse-grid">
<div className="morse-item">
<div className="character">AR</div>
<div className="morse">·−·−·</div>
<div className="description">End of message</div>
</div>
<div className="morse-item">
<div className="character">SK</div>
<div className="morse">···−·−</div>
<div className="description">End of contact</div>
</div>
<div className="morse-item">
<div className="character">BT</div>
<div className="morse">−···−</div>
<div className="description">Break</div>
</div>
<div className="morse-item">
<div className="character">KN</div>
<div className="morse">−·−−·</div>
<div className="description">Go only</div>
</div>
</div>
</div>
<div className="back-link">
<Link to="/">Back to Morse Hero</Link>
</div>
<footer className="footer">
<p>Click on any character to hear its Morse code sound.</p>
<p>Created with <a href="https://www.mastercw.com/cw.js/">CW.js</a>. For a complete and professional
Morse Code training solution visit <a href="https://www.mastercw.com">Master CW</a>.</p>
</footer>
</div>
);
};
// Helper function to get morse code representation
const getMorseCode = (char: string) => {
const morseMap: { [key: string]: string } = {
'A': '·−', 'B': '−···', 'C': '−·−·', 'D': '−··', 'E': '·',
'F': '··−·', 'G': '−−·', 'H': '····', 'I': '··', 'J': '·−−−',
'K': '−·−', 'L': '·−··', 'M': '−−', 'N': '−·', 'O': '−−−',
'P': '·−−·', 'Q': '−−·−', 'R': '·−·', 'S': '···', 'T': '−',
'U': '··−', 'V': '···−', 'W': '·−−', 'X': '−··−', 'Y': '−·−−',
'Z': '−−··', '0': '−−−−−', '1': '·−−−−', '2': '··−−−', '3': '···−−',
'4': '····−', '5': '·····', '6': '−····', '7': '−−···', '8': '−−−··',
'9': '−−−−·', '.': '·−·−·−', ',': '−−··−−', '?': '··−−··', '/': '−··−·', '=': '−···−'
};
return morseMap[char] || '';
};
export default ChartPage;
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