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91
Flask-monitoring/app.py
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91
Flask-monitoring/app.py
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from flask import Flask, request, jsonify, render_template, redirect, url_for
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from flask_sqlalchemy import SQLAlchemy
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from datetime import datetime, timedelta
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import os
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app = Flask(__name__)
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app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///logs.db'
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app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
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db = SQLAlchemy(app)
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class Log(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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hostname = db.Column(db.String(100), nullable=False)
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message = db.Column(db.String(500), nullable=False)
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timestamp = db.Column(db.DateTime, default=datetime.utcnow)
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# Create the database if it does not exist
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if not os.path.exists('instance/logs.db'):
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with app.app_context():
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db.create_all()
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# Flag to check if tables are created
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tables_created = False
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@app.before_request
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def create_tables():
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global tables_created
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if not tables_created:
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db.create_all()
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tables_created = True
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@app.route('/log', methods=['POST'])
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def log_message():
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data = request.get_json()
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hostname = data.get('hostname')
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message = data.get('message')
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if hostname and message:
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new_log = Log(hostname=hostname, message=message)
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db.session.add(new_log)
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db.session.commit()
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return jsonify({'status': 'success', 'message': 'Log saved'}), 201
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return jsonify({'status': 'error', 'message': 'Invalid data'}), 400
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@app.route('/logs', methods=['GET'])
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def get_logs():
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logs = Log.query.all()
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return jsonify([{'id': log.id, 'hostname': log.hostname, 'message': log.message, 'timestamp': log.timestamp} for log in logs])
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@app.route('/cleanup', methods=['DELETE'])
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def cleanup_logs():
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cutoff_date = datetime.utcnow() - timedelta(days=10)
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Log.query.filter(Log.timestamp < cutoff_date).delete()
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db.session.commit()
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return jsonify({'status': 'success', 'message': 'Old logs deleted'})
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@app.route('/')
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def index():
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# Get the latest log entry for each board
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latest_logs = db.session.query(Log).order_by(Log.timestamp.desc()).all()
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boards = {}
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for log in latest_logs:
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if log.hostname not in boards:
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boards[log.hostname] = log
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# Determine the status of each board
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board_status = []
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for hostname, log in boards.items():
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time_diff = datetime.utcnow() - log.timestamp
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status = 'Online' if time_diff.total_seconds() <= 20 else 'Possible Offline'
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board_status.append({'hostname': hostname, 'status': status, 'last_seen': log.timestamp})
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return render_template('index.html', boards=board_status)
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@app.route('/board/<hostname>')
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def view_board(hostname):
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logs = Log.query.filter_by(hostname=hostname).order_by(Log.timestamp.desc()).all()
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return render_template('board.html', hostname=hostname, logs=logs)
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@app.route('/delete_board/<hostname>', methods=['POST'])
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def delete_board(hostname):
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Log.query.filter_by(hostname=hostname).delete()
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db.session.commit()
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return redirect(url_for('index'))
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@app.route('/board/<hostname>/logs', methods=['GET'])
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def get_board_logs(hostname):
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logs = Log.query.filter_by(hostname=hostname).order_by(Log.timestamp.desc()).all()
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return jsonify({'logs': [{'timestamp': log.timestamp, 'message': log.message} for log in logs]})
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if __name__ == '__main__':
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app.run(host='0.0.0.0', port=5000)
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93
Flask-monitoring/templates/board.html
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93
Flask-monitoring/templates/board.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Board Logs - {{ hostname }}</title>
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<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
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<style>
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body {
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background-color: #f8f9fa;
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}
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.card {
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border: 1px solid #dee2e6;
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border-radius: 0.25rem;
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box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
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}
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.card-title {
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font-size: 1.25rem;
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font-weight: 500;
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}
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.card-text {
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font-size: 1rem;
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color: #6c757d;
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}
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.timer {
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font-size: 1rem;
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color: #6c757d;
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text-align: right;
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}
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</style>
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<script>
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function updateLogs() {
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fetch('{{ url_for("get_board_logs", hostname=hostname) }}')
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.then(response => response.json())
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.then(data => {
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const logsContainer = document.getElementById('logs-container');
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logsContainer.innerHTML = '';
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data.logs.forEach(log => {
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const logItem = document.createElement('li');
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logItem.className = 'list-group-item';
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logItem.innerHTML = `<strong>${log.timestamp}</strong>: ${log.message}`;
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logsContainer.appendChild(logItem);
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});
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});
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}
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function startTimer() {
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let timer = 5;
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setInterval(() => {
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if (timer === 0) {
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updateLogs();
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timer = 5;
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}
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document.getElementById('timer').innerText = `Next update in ${timer} seconds`;
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timer--;
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}, 1000);
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}
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window.onload = startTimer;
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</script>
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</head>
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<body>
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<div class="container mt-5">
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<div class="row mb-4">
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<div class="col-md-6">
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<form action="{{ url_for('delete_board', hostname=hostname) }}" method="post">
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<button type="submit" class="btn btn-danger">Delete Board</button>
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<a href="{{ url_for('index') }}" class="btn btn-secondary">Back to Home</a>
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</form>
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</div>
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<div class="col-md-6 timer">
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<span id="timer">Next update in 5 seconds</span>
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</div>
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</div>
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<div class="row">
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<div class="col-md-12">
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<div class="card mb-4">
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<div class="card-body">
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<h5 class="card-title">Logs for {{ hostname }}</h5>
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<ul class="list-group" id="logs-container">
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{% for log in logs %}
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<li class="list-group-item">
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<strong>{{ log.timestamp }}</strong>: {{ log.message }}
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</li>
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{% endfor %}
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</ul>
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</div>
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</div>
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</div>
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</div>
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</div>
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</body>
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</html>
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58
Flask-monitoring/templates/index.html
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58
Flask-monitoring/templates/index.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>ESP Board Status</title>
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<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
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<style>
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body {
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background-color: #f8f9fa;
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}
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.card {
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border: 1px solid #dee2e6;
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border-radius: 0.25rem;
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box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
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}
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.card-title {
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font-size: 1.25rem;
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font-weight: 500;
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}
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.card-text {
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font-size: 1rem;
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color: #6c757d;
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}
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.status-online {
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color: #28a745;
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font-weight: bold;
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}
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.status-offline {
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color: #dc3545;
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font-weight: bold;
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}
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</style>
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</head>
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<body>
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<div class="container mt-5">
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<h1 class="text-center mb-4">ESP Board Status</h1>
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<div class="row">
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{% for board in boards %}
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<div class="col-md-4">
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<div class="card mb-4">
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<div class="card-body">
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<h5 class="card-title">{{ board.hostname }}</h5>
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<p class="card-text">Status:
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<span class="{{ 'status-online' if board.status == 'Online' else 'status-offline' }}">
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{{ board.status }}
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</span>
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</p>
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<p class="card-text">Last Seen: {{ board.last_seen }}</p>
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<a href="{{ url_for('view_board', hostname=board.hostname) }}" class="btn btn-primary">View Logs</a>
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</div>
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</div>
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</div>
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{% endfor %}
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</div>
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</div>
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</body>
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</html>
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