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added candlesticks

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This commit is contained in:
Joshua Seigler 2016-07-07 03:26:51 -04:00
parent efc5816507
commit 9cf422cdc1
3 changed files with 71 additions and 37 deletions
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102
views/chart.php
View file

@ -20,6 +20,23 @@ function getJson($url) {
return $result;
}
function getThemeVariable($variable, $defaults) {
if (!array_key_exists($variable, $defaults)) {
return null;
}
if (array_key_exists($variable, $_GET)) {
$toReturn = htmlspecialchars($_GET[$variable]);
if (1 === preg_match('/^[a-fA-F0-9]{3,6}/', $toReturn)) {
//this is an HTML color
return '#' . $toReturn;
} else {
return $toReturn;
}
} else {
return $defaults[$variable];
}
}
function renderChart(
$theme,
$currencyA,
@ -29,21 +46,30 @@ function renderChart(
) {
$durations = [
/*
valid resolutions in seconds:
300 5m
900 15m
1800 30m
7200 2h
14400 4h
86400 24h
*/
'1y'=> [
'duration' => 60 * 60 * 24 * 365,
'resolution' => 86400 // 1d
'resolution' => 86400 // 24h
],
'30d'=> [
'duration' => 60 * 60 * 24 * 30,
'resolution' => 7200 // 2h
'resolution' => 14400 // 4h
],
'7d'=> [
'duration' => 60 * 60 * 24 * 7,
'resolution' => 1800 // 30m
'resolution' => 7200 // 2h
],
'24h' => [
'duration' => 60 * 60 * 24 * 1,
'resolution' => 300 // 15m
'resolution' => 900 // 15m
]
];
@ -74,6 +100,17 @@ function renderChart(
'fontSize'=>4,
'yAxisEnabled'=>false,
'xAxisEnabled'=>false
],
'candlestick'=>[
'width' => 1000,
'height' => 300,
'barColor' => '#000',
'risingColor' => '#0D0',
'fallingColor' => '#D00',
'labelColor' => '#000',
'fontSize' => 15,
'yAxisEnabled'=>true,
'xAxisEnabled'=>false
]
];
@ -124,19 +161,26 @@ function renderChart(
$cacheTimeSeconds = max(60, end($poloniexJson)->date + $dataResolution - time() + 60);
}
$chartData = [];
foreach ($poloniexJson as $item) {
$chartData[$item->date] = $item->weightedAverage;
}
if ($format == 'svg') {
$chartOptions = array_replace($themes[$theme], ['lineColor'=>'@lineColor', 'markerColor'=>'@markerColor']);
$chartOptions = array_replace($themes[$theme], [
'lineColor'=>'@lineColor',
'markerColor'=>'@markerColor',
'risingColor'=>'@risingColor',
'fallingColor'=>'@fallingColor'
]);
} else {
$chartOptions = $themes[$theme];
}
$poloniexChart = new NeatCharts\LineChart($chartData, $chartOptions);
if ($theme == 'candlestick') {
$poloniexChart = new NeatCharts\CandlestickChart($poloniexJson, $chartOptions);
} else {
$chartData = [];
foreach ($poloniexJson as $item) {
$chartData[$item->date] = $item->weightedAverage;
}
$poloniexChart = new NeatCharts\LineChart($chartData, $chartOptions);
}
$result = '<?xml version="1.0" standalone="no"?>' . PHP_EOL;
$result .= $poloniexChart->render();
@ -165,28 +209,18 @@ function renderChart(
} else if ($format == 'svg') {
header('Content-type: image/svg+xml; charset=utf-8');
header('Content-Disposition: inline; filename="Dash-chart-' . gmdate('Y-m-d\THis+0', $startTime) . '--' . gmdate('Y-m-d\THis+0') . '.svg"');
if (array_key_exists('lineColor', $_GET)) {
$lineColor = htmlspecialchars($_GET['lineColor']);
if (1 === preg_match('/^[a-fA-F0-9]{3,6}/', $lineColor)) {
//this is an HTML color
$lineColor = '#' . $lineColor;
}
} else {
$lineColor = $themes[$theme]['lineColor'];
}
if (array_key_exists('markerColor', $_GET)) {
$markerColor = htmlspecialchars($_GET['markerColor']);
if (1 === preg_match('/^[a-fA-F0-9]{3,6}/', $markerColor)) {
//this is an HTML color
$markerColor = '#' . $markerColor;
}
} else {
$markerColor = $themes[$theme]['markerColor'];
}
echo str_replace(['@lineColor', '@markerColor'], [$lineColor, $markerColor], $result);
$result = str_replace([
'@lineColor',
'@markerColor',
'@risingColor',
'@fallingColor'
], [
getThemeVariable('lineColor', $themes[$theme]),
getThemeVariable('markerColor', $themes[$theme]),
getThemeVariable('risingColor', $themes[$theme]),
getThemeVariable('fallingColor', $themes[$theme])
], $result);
echo $result;
} else {
return false;
}

4
views/index.php
View file

@ -72,8 +72,8 @@
<section>
<h2>Transparent SVG and PNG charts with your favorite cryptocurrencies</h2>
<figure>
<img src="/charts/dark/dash-btc/30d/svg?lineColor=1C74BC" alt="Poloniex Dash/BTC price">
<figcaption>30 Day Dash price in BTC <code><a href="/charts/dark/dash-btc/30d/svg?lineColor=1C74BC">http://cryptohistory.org/charts/dark/dash-btc/30d/svg?lineColor=1C74BC</a></code></figcaption>
<img src="/charts/candlestick/dash-btc/7d/svg" alt="Poloniex Dash/BTC price">
<figcaption>30 day Dash price candlesticks in BTC <code><a href="/charts/candlestick/dash-btc/30d/svg">http://cryptohistory.org/charts/candlestick/dash-btc/30d/svg</a></code></figcaption>
</figure>
<p>Sparklines too! ETH 7 days: <img src="/charts/sparkline/eth-btc/7d/svg" alt="ETH 7d chart" style="vertical-align: bottom;">
<code>&lt;img src=&quot;http://cryptohistory.org/charts/sparkline/eth-btc/7d/svg&quot; alt=&quot;ETH 7d chart&quot; style=&quot;vertical-align: bottom;&quot;&gt;</code>