spaceAPI/statechanges.html at master · ACKspace/spaceAPI · GitHub

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<!DOCTYPE html>
<html>
	<head>
    <meta http-equiv="pragma" content="no-cache" />
    <meta http-equiv="cache-control" content="no-cache" />
    <meta http-equiv="expires" content="-1" />
		<style>
			table {
				padding-bottom: 20px;
			}
			th {
				font-weight: bold;
				text-align: center;
			}
			td {
				width: 30px;
				height: 30px;
				font-size: 69%;
				text-align: right;
				padding: 2px;
				text-align: center;
			}
		</style>
	</head>
	<body>
		<div id="json_div"></div>
		<script type="text/javascript">
			"use strict";

			function handleTimePeriod(element, timePeriod, description, showNow) {
				const xhr = new XMLHttpRequest();
				const url = 'statechanges.php?' + timePeriod;
				xhr.open('GET', url);
				xhr.responseType = 'json';
				xhr.onload = function(event) {
					const states = event.target.response;
					const table  = document.createElement('table');
					addHead(table, description);
					addBody(table, states, showNow);
		         element.append(table);
				};
				xhr.send();
			}

			function addHead(table, description) {
				const head            = table.createTHead();
				const rowDescription  = head.insertRow();
				const thDescription   = document.createElement('th');
				thDescription.colSpan = 26;
				rowDescription.appendChild(thDescription);
				thDescription.append(description);

				const rowHours = head.insertRow();
				const thHours  = document.createElement('th');
				rowHours.appendChild(thHours);
				const hours = Array.from(Array(24).keys());
				hours.push('avg');
				for (const hour of hours) {
					const thHour = document.createElement('th');
					const text   = hour.toString().padStart(2, '0');
					thHour.append(text);
					rowHours.appendChild(thHour);
				}
			}

			function addBody(table, states, showNow) {
				const days = [
					'',
					'Mon', 'Tue', 'Wed',	'Thu', 'Fri',
					'Sat', 'Sun',
					'Avg'
				]
				const timeZone = 'Europe/Amsterdam';
				const date     = new Date(new Date().toLocaleString(
					'en-US', { 'timeZone': timeZone }
				));
				const dateDay  = date.getDay();
				const dateHour = date.getHours();
				for (const dayNumber in states) {
					const row = table.insertRow();
					const th  = document.createElement('th');
					th.append(days[dayNumber]);
					row.appendChild(th);
					for(const hourNumber in states[dayNumber]) {
						const value      = states[dayNumber][hourNumber];
						const percentage = Math.round(value * 100);
						const now        = showNow && (
							(dayNumber <= 7              ) &&
							(dateDay   == (dayNumber % 7)) &&
							(dateHour  ==  hourNumber    )
						);
						cell(row, percentage, now);
					}
				}
			}

			function cell(row, percentage, now) {
				const cell = row.insertCell();
				const text = percentage;
				cell.append(text);
				if (now) {
	            //cell.style.fontWeight = 'bold';
               cell.style.textAlign  = 'center';
               cell.style.border     = '2px solid black';
               cell.style.padding    = '0px';
				}

				let red = 0, green = 0;
				if (percentage > 50) {
					red   = 255 - (percentage - 50) * 5.12;
					green = 255;
				}
				else {
					red   = 255;
					green = percentage * 5.12;
				}
				red   = parseInt(red);
				green = parseInt(green);
				cell.style.backgroundColor =
					'rgba(' + red + ',' + green + ',0,0.6)'
				;
				return cell
			}

			const timePeriods = {
				'1week'  : "Last week's space state",
				'1month' : "Last month's space state average",
				'3month' : "Last quarter's space state average",
				'1year'  : "Last year's space state average",
				'2year'  : "Two year's space state average"
			};
			let showNow = true;
			const div   = document.getElementById('json_div');
			for (const [timePeriod, description] of Object.entries(timePeriods)) {
				const element = document.createElement('div');
				div.append(element);
				handleTimePeriod(element, timePeriod, description, showNow);
				showNow = false;
			}
		</script>
	</body>
</html>