add piwik installation

www/analytics/core/Visualization/Sparkline.php

@@ -0,0 +1,177 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+
+namespace Piwik\Visualization;
+
+use Piwik\Common;
+use Piwik\Piwik;
+use Piwik\View\ViewInterface;
+use Sparkline_Line;
+
+/**
+ * @see libs/sparkline/lib/Sparkline_Line.php
+ * @link http://sparkline.org
+ */
+require_once PIWIK_INCLUDE_PATH . '/libs/sparkline/lib/Sparkline_Line.php';
+
+/**
+ * Renders a sparkline image given a PHP data array.
+ * Using the Sparkline PHP Graphing Library sparkline.org
+ */
+class Sparkline implements ViewInterface
+{
+    const DEFAULT_WIDTH = 100;
+    const DEFAULT_HEIGHT = 25;
+
+    public static $enableSparklineImages = true;
+
+    private static $colorNames = array('backgroundColor', 'lineColor', 'minPointColor', 'lastPointColor', 'maxPointColor');
+
+    /**
+     * Width of the sparkline
+     * @var int
+     */
+    protected $_width = self::DEFAULT_WIDTH;
+
+    /**
+     * Height of sparkline
+     * @var int
+     */
+    protected $_height = self::DEFAULT_HEIGHT;
+
+    /**
+     * Array with format: array( x, y, z, ... )
+     * @param array $data
+     */
+    public function setValues($data)
+    {
+        $this->values = $data;
+    }
+
+    /**
+     * Sets the height of the sparkline
+     * @param int $height
+     */
+    public function setHeight($height)
+    {
+
+        if (!is_numeric($height) || $height <= 0) {
+            return;
+        }
+
+        $this->_height = (int)$height;
+    }
+
+    /**
+     * Sets the width of the sparkline
+     * @param int $width
+     */
+    public function setWidth($width)
+    {
+
+        if (!is_numeric($width) || $width <= 0) {
+            return;
+        }
+
+        $this->_width = (int)$width;
+    }
+
+    /**
+     * Returns the width of the sparkline
+     * @return int
+     */
+    public function getWidth()
+    {
+        return $this->_width;
+    }
+
+    /**
+     * Returns the height of the sparkline
+     * @return int
+     */
+    public function getHeight()
+    {
+        return $this->_height;
+    }
+
+    public function main()
+    {
+        $width = $this->getWidth();
+        $height = $this->getHeight();
+
+        $sparkline = new Sparkline_Line();
+        $this->setSparklineColors($sparkline);
+
+        $min = $max = $last = null;
+        $i = 0;
+        $toRemove = array('%', str_replace('%s', '', Piwik::translate('General_Seconds')));
+        foreach ($this->values as $value) {
+            // 50% and 50s should be plotted as 50
+            $value = str_replace($toRemove, '', $value);
+            // replace localized decimal separator
+            $value = str_replace(',', '.', $value);
+            if ($value == '') {
+                $value = 0;
+            }
+
+            $sparkline->SetData($i, $value);
+
+            if (null == $min || $value <= $min[1]) {
+                $min = array($i, $value);
+            }
+            if (null == $max || $value >= $max[1]) {
+                $max = array($i, $value);
+            }
+            $last = array($i, $value);
+            $i++;
+        }
+        $sparkline->SetYMin(0);
+        $sparkline->SetYMax($max[1]);
+        $sparkline->SetPadding(3, 0, 2, 0); // top, right, bottom, left
+        $sparkline->SetFeaturePoint($min[0], $min[1], 'minPointColor', 5);
+        $sparkline->SetFeaturePoint($max[0], $max[1], 'maxPointColor', 5);
+        $sparkline->SetFeaturePoint($last[0], $last[1], 'lastPointColor', 5);
+        $sparkline->SetLineSize(3); // for renderresampled, linesize is on virtual image
+        $ratio = 1;
+        $sparkline->RenderResampled($width * $ratio, $height * $ratio);
+        $this->sparkline = $sparkline;
+    }
+
+    public function render()
+    {
+        if (self::$enableSparklineImages) {
+            $this->sparkline->Output();
+        }
+    }
+
+    /**
+     * Sets the sparkline colors
+     *
+     * @param Sparkline_Line $sparkline
+     */
+    private function setSparklineColors($sparkline)
+    {
+        $colors = Common::getRequestVar('colors', false, 'json');
+        if (empty($colors)) { // quick fix so row evolution sparklines will have color in widgetize's iframes
+            $colors = array(
+                'backgroundColor' => '#ffffff',
+                'lineColor'       => '#162C4A',
+                'minPointColor'   => '#ff7f7f',
+                'lastPointColor'  => '#55AAFF',
+                'maxPointColor'   => '#75BF7C'
+            );
+        }
+
+        foreach (self::$colorNames as $name) {
+            if (!empty($colors[$name])) {
+                $sparkline->SetColorHtml($name, $colors[$name]);
+            }
+        }
+    }
+}