thomas
/
weight-track


			
				
					
						
						
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							<html lang="en">
    <head>
        <meta charset="utf-8" />
        <title>Weight-Track</title>
        <script src="https://cdn.jsdelivr.net/npm/chart.js@2.9.0/dist/Chart.bundle.min.js" integrity="sha256-tSYaQkuUF17Z5HozxXRWckY1j6uVLYFEHGEooJ6YsP0=" crossorigin="anonymous"></script>
    </head>
    <body>
        <div id="content">
            <h1>Weight-Track</h1>
            <p id="status">Please wait while Weight-Track is loading... (JavaScript needed)</p>
        </div>
        <div id="footer">
            <p>Made with <a href="https://www.chartjs.org/docs/latest/">Chart.js</a></p>
        </div>
        <script type="text/javascript">
            var colorFromIndex = function(index) {
                var colors = [
                    '129, 38, 204',
                    '48, 181, 36',
                    '255, 99, 132',
                    '54, 162, 235',
                    '255, 206, 86',
                    '75, 192, 192',
                    '153, 102, 255',
                    '255, 159, 64'
                ];
                if (index < colors.length) {
                    return colors[index];
                } else {
                    return '120, 120, 120';
                }
            };

            var createDataset = function(name, data, color) {
                return {
                    label: name,
                    data: data,
                    backgroundColor: [
                        'rgba(' + color + ', 0)'
                    ],
                    borderColor: [
                        'rgba(' + color + ', 1)'
                    ],
                    pointBorderColor: 'rgba(' + color + ', 1)',
                    pointRadius: 2,
                    borderWidth: 4
                };
            };

            var addToForm = function(form, element, name) {
                var fe = document.createElement('p');
                fe.innerHTML = name + ' ';
                fe.appendChild(element);
                form.appendChild(fe);
            };

            var renderUser = function(data) {
                var div = document.createElement('div');
                var ctx = document.createElement('canvas');

                var min_date = new Date('3000-01-01T00:00:00');
                var max_date = new Date('1000-01-01T00:00:00');
                var min_kilo = 1000;
                var max_kilo = 0;
                for (var i = 0; i < data.users.length; i++) {
                    for (var j = 0; j < data.users[i].data.length; j++) {
                        temp_date = new Date(data.users[i].data[j].x);
                        temp_kilo = parseInt(data.users[i].data[j].y);
                        if (temp_date < min_date) {
                            min_date = temp_date;
                        }
                        if (temp_date > max_date) {
                            max_date = temp_date;
                        }
                        if (temp_kilo < min_kilo) {
                            min_kilo = temp_kilo;
                        }
                        if (temp_kilo > max_kilo) {
                            max_kilo = temp_kilo;
                        }
                    }
                }

                var days = (max_date - min_date) / 1000 / 60 / 60 / 24;
                var pixels_per_day = 3000 / 365;
                var width_px = days * pixels_per_day;

                var kilos = (max_kilo - min_kilo);
                var pixels_per_kilo = 1400 / 100;
                var height_px = kilos * pixels_per_kilo;

                var datasets = [];
                for (var i = 0; i < data.users.length; i++) {
                    var set = createDataset(data.users[i].name,
                            data.users[i].data, colorFromIndex(i));
                    datasets.push(set);
                }

                var chart = new Chart(ctx, {
                    type: 'line',
                    data: {
                        datasets: datasets
                    },
                    options: {
                        maintainAspectRatio: false,
                        scales: {
                            xAxes: [{
                                type: 'time',
                                time: {
                                    unit: 'day'
                                }
                            }]
                        },
                        events: [
                            'mousemove', 'mouseout', 'click',
                            'touchstart', 'touchmove', 'touchend'
                        ],
                        tooltips: {
                            mode: 'nearest',
                            intersect: false,
                            axis: 'x'
                        }
                    }
                });

                if (data.users.length > 0) {
                    div_wrapper = document.createElement('div');
                    div_wrapper.setAttribute('style', 'width: ' + Math.ceil(width_px) + 'px;');

                    div_wrapper.style.width = Math.ceil(width_px) + 'px';
                    div_wrapper.style.height = height_px + 'px';
                    div_wrapper.width = Math.ceil(width_px);
                    div_wrapper.height = height_px;

                    div_wrapper.appendChild(ctx);
                    div_wrapper2 = document.createElement('div');
                    div_wrapper2.setAttribute('style', 'overflow-x: auto; overflow-y: auto;');
                    div_wrapper2.appendChild(div_wrapper);

                    div.appendChild(div_wrapper2);
                    div.appendChild(document.createElement('hr'));

                    var date = new Date();
                    var hours = date.getHours();
                    hours = (hours < 10) ? '0' + hours : hours;
                    var minutes = date.getMinutes();
                    minutes = (minutes < 10) ? '0' + minutes : minutes;

                    var form_append = document.createElement('form');
                    form_append.setAttribute('method', 'post');
                    form_append.setAttribute('action', 'weight.php');

                    var p_append = document.createElement('p');
                    p_append.innerHTML = 'Add new Data-Point:';
                    form_append.appendChild(p_append);

                    var name_append = document.createElement('select');
                    for (var i = 0; i < data.users.length; i++) {
                        var option = document.createElement('option');
                        option.text = data.users[i].name;
                        option.value = 'user_' + data.users[i].id;
                        name_append.add(option);
                    }
                    name_append.setAttribute('name', 'username');
                    name_append.required = true;
                    addToForm(form_append, name_append, 'Username:');

                    var date_append = document.createElement('input');
                    date_append.setAttribute('type', 'date');
                    date_append.setAttribute('name', 'date');
                    date_append.setAttribute('placeholder', 'Date');
                    date_append.required = true;
                    date_append.value = date.toISOString().slice(0, 10);
                    addToForm(form_append, date_append, 'Date:');

                    var time_append = document.createElement('input');
                    time_append.setAttribute('type', 'time');
                    time_append.setAttribute('name', 'time');
                    time_append.setAttribute('placeholder', 'Time');
                    time_append.required = true;
                    time_append.value = hours + ':' + minutes;
                    addToForm(form_append, time_append, 'Time:');

                    var weight_append = document.createElement('input');
                    weight_append.setAttribute('type', 'number');
                    weight_append.setAttribute('name', 'weight');
                    weight_append.setAttribute('step', '0.1');
                    weight_append.min = 42.0;
                    weight_append.max = 999.9;
                    weight_append.setAttribute('placeholder', 'Weight');
                    weight_append.required = true;
                    addToForm(form_append, weight_append, 'Weight:');

                    var submit_append = document.createElement('input');
                    submit_append.setAttribute('type', 'submit');
                    submit_append.setAttribute('value', 'Add Data');
                    form_append.appendChild(submit_append);

                    div.appendChild(form_append);
                    div.appendChild(document.createElement('hr'));
                }

                var form_new = document.createElement('form');
                form_new.setAttribute('method', 'post');
                form_new.setAttribute('action', 'weight.php');

                var p_new = document.createElement('p');
                p_new.innerHTML = 'Add new User:';
                form_new.appendChild(p_new);

                var name_new = document.createElement('input');
                name_new.setAttribute('type', 'text');
                name_new.setAttribute('name', 'username');
                name_new.setAttribute('placeholder', 'Name');
                name_new.required = true;
                addToForm(form_new, name_new, 'Username:');

                var submit_new = document.createElement('input');
                submit_new.setAttribute('type', 'submit');
                submit_new.setAttribute('value', 'Add User');
                form_new.appendChild(submit_new);

                div.appendChild(form_new);
                div.appendChild(document.createElement('hr'));
                document.getElementById("content").appendChild(div);
            };

            var getJSON = function(url, callback) {
                var xhr = new XMLHttpRequest();
                xhr.open('GET', url, true);
                xhr.responseType = 'json';
                xhr.onload = function() {
                    if (xhr.status === 200) {
                        callback(null, xhr.response);
                    } else {
                        callback(xhr.status, xhr.response);
                    }
                };
                xhr.send();
            };

            document.getElementById("status").textContent = "Loading from Database...";

            getJSON('weight.php', function(err, data) {
                if (err !== null) {
                    document.getElementById("status").textContent = 'Error: ' + err;
                    return;
                }
                if (typeof data.error !== 'undefined') {
                    document.getElementById("status").textContent = 'Error: ' + data.error;
                    return;
                }
                if (typeof data.users !== 'undefined') {
                    var s = 'Received data for ' + data.users.length + ' users';
                    if (data.users.length > 0) {
                        s += ': ';
                        for (var i = 0; i < data.users.length; i++) {
                            s += '"' + data.users[i].name + '"';
                            if (i < (data.users.length - 1)) {
                                s += ', ';
                            }
                        }
                        s += '. Rendering...';
                    } else {
                        s += '. Nothing to show!';
                    }
                    document.getElementById("status").textContent = s;
                    renderUser(data);
                } else {
                    document.getElementById("status").textContent = 'Error: no data';
                    return;
                }
            });
        </script>
    </body>
</html>