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script-chart-transactions-per-block.js
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script-chart-transactions-per-block.js
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template.transactionsPerBlockChart = tmpl('template-transactions-per-block-chart');
async function _transactionsPerBlock(range, skipRender) {
range = range || 'month';
skipRender = skipRender || false;
if(!skipRender) {
// Only replace infobox contents when not coming from the range toggle
$infobox.innerHTML = template.transactionsPerBlockChart();
window.scrollTo(0, $infobox.offsetTop - 100);
}
fetch(apiUrl + '/statistics/transactions/' + range).then(function(response) {
response.json().then(function(data) { // { h: block_height, t: timestamp, v: value, c: count }
var transactionCount = data.map(function(block) { return block['c']; });
var transactionValue = data.map(function(block) { return block['v']; });
var timestamp = data.map(function(block) { return block['t']; });
// Fill empty times
var i = 0
var gap;
var now = Date.now() / 1000;
switch(range) {
case 'day':
gap = 15 * 60; // 15 minutes
break;
case 'week':
gap = 2 * 60 * 60 // 2 hours
break;
case 'month':
gap = 8 * 60 * 60; // 8 hours
break;
default: // 'year'
gap = 4 * 24 * 60 * 60; // 4 days
break;
}
while(timestamp[i]) {
if(
(!timestamp[i + 1] && now - timestamp[i] > gap * 1.8)
|| (timestamp[i + 1] > timestamp[i] + gap * 1.8)
) {
// Add missing time
timestamp.splice(i + 1, 0, timestamp[i] + gap);
transactionCount.splice(i + 1, 0, 0);
transactionValue.splice(i + 1, 0, 0);
}
i++;
}
var months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
var timelabel = timestamp.map(function(time) {
var date = new Date(time * 1000);
return date.getDate() + ". " + months[date.getMonth()] + " " + date.toTimeString().slice(0, 5);
});
transactionValue = transactionValue.map(value => Nimiq.Policy.satoshisToCoins(value));
var _renderTransactionsPerBlockChart = function() {
try {
$infobox.removeChild($infobox.getElementsByClassName('blocklist-loader')[0]);
}
catch(e) {}
$infobox.getElementsByClassName('chart-valid-info')[0].innerHTML = "Created " + (new Date()).toLocaleString();
if(window.chart) window.chart.destroy();
var ctx = $infobox.getElementsByTagName('canvas')[0].getContext('2d');
window.chart = new Chart(ctx, {
// The type of chart we want to create
type: 'bar',
// The data for our dataset
data: {
labels: timelabel,
datasets: [
{
label: "Transaction Volume",
backgroundColor: '#F6AE2D',
pointBackgroundColor: 'transparent',
borderColor: '#F6AE2D',
pointRadius: 3,
borderWidth: 2,
fill: false,
data: transactionValue,
type: 'line',
yAxisID: 'transactionValue'
},
{
label: "Transactions",
backgroundColor: '#042146',
borderColor: '#042146',
data: transactionCount,
yAxisID: 'transactionCount'
}]
},
// Configuration options go here
options: {
legend: {
// display: false
reverse: true,
labels: {
fontFamily: "'Source Sans Pro', sans-serif",
fontSize: 16,
boxWidth: 16
}
},
scales: {
yAxes: [
{
id: 'transactionValue',
position: 'right',
scaleLabel: {
display: true,
labelString: "Transaction Volume",
fontFamily: "'Source Sans Pro', sans-serif",
fontSize: 16
}
},
{
id: 'transactionCount',
position: 'left',
scaleLabel: {
display: true,
labelString: "Transactions",
fontFamily: "'Source Sans Pro', sans-serif",
fontSize: 16
}
}
]
},
animation: {
duration: 0,
},
}
});
};
if(document.getElementById('chart-js-script')) {
_renderTransactionsPerBlockChart();
}
else {
var scriptTag = document.createElement('script');
scriptTag.id = "chart-js-script";
scriptTag.src = "https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.min.js";
scriptTag.onload = _renderTransactionsPerBlockChart;
document.body.appendChild(scriptTag);
}
});
});
}
function switchTransactionsPerBlockRange(range) {
_transactionsPerBlock(range, true);
}