From 8df3db566a3a937b45ebf11adb90d265e6f5e2d4 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sun, 17 Nov 2019 20:45:02 +0100
Subject: initial checking of customized version 1.0rc9

---
 vendor/jamiebicknell/Sparkline/sparkline.php | 114 +++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 vendor/jamiebicknell/Sparkline/sparkline.php

(limited to 'vendor/jamiebicknell/Sparkline/sparkline.php')

diff --git a/vendor/jamiebicknell/Sparkline/sparkline.php b/vendor/jamiebicknell/Sparkline/sparkline.php
new file mode 100644
index 0000000..adfb9e1
--- /dev/null
+++ b/vendor/jamiebicknell/Sparkline/sparkline.php
@@ -0,0 +1,114 @@
+<?php
+
+/*
+Title:      Sparkline
+URL:        http://github.com/jamiebicknell/Sparkline
+Author:     Jamie Bicknell
+Twitter:    @jamiebicknell
+*/
+
+function isHex($string)
+{
+    return preg_match('/^#?+[0-9a-f]{3}(?:[0-9a-f]{3})?$/i', $string);
+}
+
+function hexToRgb($hex)
+{
+    $hex = ltrim(strtolower($hex), '#');
+    $hex = isset($hex[3]) ? $hex : $hex[0] . $hex[0] . $hex[1] . $hex[1] . $hex[2] . $hex[2];
+    $dec = hexdec($hex);
+    return array(0xFF & ($dec >> 0x10), 0xFF & ($dec >> 0x8), 0xFF & $dec);
+}
+
+$size = isset($_GET['size']) ? str_replace('x', '', $_GET['size']) != '' ? $_GET['size'] : '80x20' : '80x20';
+$back = isset($_GET['back']) ? isHex($_GET['back']) ? $_GET['back'] : 'ffffff' : 'ffffff';
+$line = isset($_GET['line']) ? isHex($_GET['line']) ? $_GET['line'] : '1388db' : '1388db';
+$fill = isset($_GET['fill']) ? isHex($_GET['fill']) ? $_GET['fill'] : 'e6f2fa' : 'e6f2fa';
+$data = isset($_GET['data']) ? explode(',', $_GET['data']) : array();
+
+list($w, $h) = explode('x', $size);
+$w = floor(max(50, min(800, $w)));
+$h = !strstr($size, 'x') ? $w : floor(max(20, min(800, $h)));
+$t = 1.75;
+$s = 4;
+
+$w *= $s;
+$h *= $s;
+$t *= $s;
+
+$salt = 'v1.0.1';
+$hash = md5($salt . $_SERVER['QUERY_STRING']);
+
+$data = (count($data) < 2) ? array_fill(0, 2, $data[0]) : $data;
+$count = count($data);
+$step = $w / ($count - 1);
+
+$min = min($data);
+$max = max($data);
+if ($max != $min) {
+    foreach ($data as $k => $v) {
+        $data[$k] -= $min;
+    }
+    $max = max($data);
+}
+
+if (!extension_loaded('gd')) {
+    die('GD extension is not installed');
+}
+
+if (isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
+    if ($_SERVER['HTTP_IF_NONE_MATCH'] == $hash) {
+        header($_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified');
+        die();
+    }
+}
+
+$im = imagecreatetruecolor($w, $h);
+list($r, $g, $b) = hexToRgb($back);
+$bg = imagecolorallocate($im, $r, $g, $b);
+list($r, $g, $b) = hexToRgb($line);
+$fg = imagecolorallocate($im, $r, $g, $b);
+list($r, $g, $b) = hexToRgb($fill);
+$lg = imagecolorallocate($im, $r, $g, $b);
+imagefill($im, 0, 0, $bg);
+
+imagesetthickness($im, $t);
+
+foreach ($data as $k => $v) {
+    $v = $v > 0 ? round($v / $max * $h) : 0;
+    $data[$k] = max($s, min($v, $h - $s));
+}
+
+$x1 = 0;
+$y1 = $h - $data[0];
+$line = array();
+$poly = array(0, $h + 50, $x1, $y1);
+for ($i = 1; $i < $count; $i++) {
+    $x2 = $x1 + $step;
+    $y2 = $h - $data[$i];
+    array_push($line, array($x1, $y1, $x2, $y2));
+    array_push($poly, $x2, $y2);
+    $x1 = $x2;
+    $y1 = $y2;
+}
+array_push($poly, $x2, $h + 50);
+
+imagefilledpolygon($im, $poly, $count + 2, $lg);
+
+foreach ($line as $k => $v) {
+    list($x1, $y1, $x2, $y2) = $v;
+    imageline($im, $x1, $y1, $x2, $y2, $fg);
+}
+
+$om = imagecreatetruecolor($w / $s, $h / $s);
+imagecopyresampled($om, $im, 0, 0, 0, 0, $w / $s, $h / $s, $w, $h);
+imagedestroy($im);
+
+header('Content-Type: image/png');
+header('Content-Disposition: inline; filename="sparkline_' . time() . substr(microtime(), 2, 3) . '.png"');
+header('ETag: ' . $hash);
+header('Accept-Ranges: none');
+header('Cache-Control: max-age=604800, must-revalidate');
+header('Expires: ' . gmdate('D, d M Y H:i:s T', strtotime('+7 days')));
+imagepng($om);
+imagedestroy($om);
-- 
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