Initial commit: PDGA rating scraper and predictor

- Web scraping app for PDGA player ratings
- Current rating extraction from player pages
- Tournament round rating scraping for predictions
- Statistical rating prediction algorithm
- Interactive table with on-demand calculations
- Caching for performance optimization

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Samuel Enocsson
2025-08-12 11:13:13 +02:00
commit deb162dc13
7 changed files with 2716 additions and 0 deletions
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>PDGA Ratings</title>
<style>
body {
font-family: Arial, sans-serif;
margin: 40px;
background-color: #f5f5f5;
}
.container {
max-width: 800px;
margin: 0 auto;
background: white;
padding: 30px;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
h1 {
color: #333;
text-align: center;
margin-bottom: 30px;
}
.loading {
text-align: center;
padding: 20px;
font-size: 18px;
color: #666;
}
.refresh-btn {
background-color: #007bff;
color: white;
padding: 10px 20px;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
margin-bottom: 20px;
}
.refresh-btn:hover {
background-color: #0056b3;
}
table {
width: 100%;
border-collapse: collapse;
margin-top: 20px;
}
th, td {
padding: 12px;
text-align: left;
border-bottom: 1px solid #ddd;
}
th {
background-color: #f8f9fa;
font-weight: bold;
color: #495057;
}
tr:hover {
background-color: #f5f5f5;
}
.rating {
font-weight: bold;
color: #007bff;
}
.pdga-number {
color: #6c757d;
font-size: 14px;
}
.difference {
font-weight: bold;
}
.positive {
color: #28a745;
}
.negative {
color: #dc3545;
}
.neutral {
color: #6c757d;
}
.calc-btn {
background-color: #17a2b8;
color: white;
border: none;
padding: 5px 10px;
border-radius: 3px;
cursor: pointer;
font-size: 12px;
}
.calc-btn:hover {
background-color: #138496;
}
.calc-btn:disabled {
background-color: #6c757d;
cursor: not-allowed;
}
.rating-change {
font-weight: bold;
font-size: 14px;
}
</style>
</head>
<body>
<div class="container">
<h1>PDGA Player Ratings</h1>
<button class="refresh-btn" onclick="fetchRatings()">Refresh Ratings</button>
<div id="loading" class="loading">Loading ratings...</div>
<div id="ratings-table"></div>
</div>
<script>
async function fetchRatings() {
const loadingDiv = document.getElementById('loading');
const tableDiv = document.getElementById('ratings-table');
loadingDiv.style.display = 'block';
tableDiv.innerHTML = '';
try {
const response = await fetch('/api/ratings');
const ratings = await response.json();
loadingDiv.style.display = 'none';
if (ratings.length === 0) {
tableDiv.innerHTML = '<p>No ratings found.</p>';
return;
}
let tableHTML = `
<table>
<thead>
<tr>
<th>Rank</th>
<th>Player Name</th>
<th>PDGA #</th>
<th>Current Rating</th>
<th>Rating Change</th>
<th>Predicted Rating</th>
<th>Difference</th>
</tr>
</thead>
<tbody>
`;
ratings.forEach((player, index) => {
const difference = player.predictedRating && player.rating ?
player.predictedRating - player.rating : 0;
const diffText = difference > 0 ? `+${difference}` : difference.toString();
const diffClass = difference > 0 ? 'positive' : difference < 0 ? 'negative' : 'neutral';
const ratingChangeText = player.ratingChange ?
(player.ratingChange > 0 ? `+${player.ratingChange}` : player.ratingChange.toString()) : 'N/A';
const ratingChangeClass = player.ratingChange > 0 ? 'positive' :
player.ratingChange < 0 ? 'negative' : 'neutral';
tableHTML += `
<tr id="row-${player.pdgaNumber}">
<td>${index + 1}</td>
<td>${player.name}</td>
<td class="pdga-number">#${player.pdgaNumber}</td>
<td class="rating">${player.rating || 'N/A'}</td>
<td class="rating-change ${ratingChangeClass}">${ratingChangeText}</td>
<td class="predicted-rating" id="predicted-${player.pdgaNumber}">
${player.predictedRating || 'N/A'}
</td>
<td class="difference ${diffClass}" id="diff-${player.pdgaNumber}">
${difference ? diffText :
`<button class="calc-btn" onclick="calculatePredictedRating(${player.pdgaNumber})">Calculate Approx Rating</button>`}
</td>
</tr>
`;
});
tableHTML += `
</tbody>
</table>
`;
tableDiv.innerHTML = tableHTML;
} catch (error) {
loadingDiv.style.display = 'none';
tableDiv.innerHTML = '<p>Error loading ratings. Please try again.</p>';
console.error('Error:', error);
}
}
async function calculatePredictedRating(pdgaNumber) {
const button = document.querySelector(`#diff-${pdgaNumber} .calc-btn`);
const predictedCell = document.getElementById(`predicted-${pdgaNumber}`);
const diffCell = document.getElementById(`diff-${pdgaNumber}`);
button.disabled = true;
button.textContent = 'Calculating...';
try {
const response = await fetch(`/api/predicted-rating/${pdgaNumber}`, {
method: 'POST'
});
const data = await response.json();
if (data.predictedRating) {
predictedCell.textContent = data.predictedRating;
const currentRating = parseInt(document.querySelector(`#row-${pdgaNumber} .rating`).textContent);
const difference = data.predictedRating - currentRating;
const diffText = difference > 0 ? `+${difference}` : difference.toString();
const diffClass = difference > 0 ? 'positive' : difference < 0 ? 'negative' : 'neutral';
diffCell.className = `difference ${diffClass}`;
diffCell.textContent = diffText;
} else {
predictedCell.textContent = 'Error';
diffCell.textContent = 'Error';
}
} catch (error) {
console.error('Error calculating predicted rating:', error);
predictedCell.textContent = 'Error';
button.disabled = false;
button.textContent = 'Calculate Approx Rating';
}
}
fetchRatings();
</script>
</body>
</html>