From b378a73da67a6ae4d17f9d6f63b4b3b6e6589acb Mon Sep 17 00:00:00 2001
From: Yannick Warnier <ywarnier@beeznest.org>
Date: Fri, 2 Nov 2018 18:12:03 -0500
Subject: [PATCH] Add getColorPalette() to ChamiloApi to return common array of
 colors

---
 main/inc/ajax/statistics.ajax.php             | 16 +++-------
 .../CoreBundle/Component/Utils/ChamiloApi.php | 29 +++++++++++++++++++
 2 files changed, 33 insertions(+), 12 deletions(-)

diff --git a/main/inc/ajax/statistics.ajax.php b/main/inc/ajax/statistics.ajax.php
index 561d3fd56d..4e25c97039 100644
--- a/main/inc/ajax/statistics.ajax.php
+++ b/main/inc/ajax/statistics.ajax.php
@@ -6,6 +6,8 @@
  */
 require_once __DIR__.'/../global.inc.php';
 
+use Chamilo\CoreBundle\Component\Utils\ChamiloApi;
+
 api_protect_admin_script();
 
 $action = isset($_REQUEST['a']) ? $_REQUEST['a'] : null;
@@ -154,17 +156,7 @@ switch ($action) {
             $list['labels'][] = $tick;
         }
 
-        // Get the common colors from the palette used for pchart
-        $paletteFile = api_get_path(SYS_CODE_PATH).'palettes/pchart/default.color';
-        $palette = file($paletteFile);
-        // Because the pchart palette has transparency as integer values
-        // (0..100) and chartjs uses percentage (0.0..1.0), we need to divide
-        // the last value by 100, which is a bit overboard for just one chart
-        foreach ($palette as $index => $color) {
-            $components = preg_split('/,/', trim($color));
-            $components[3] = round($components[3] / 100, 1);
-            $palette[$index] = join(',', $components);
-        }
+        $palette = ChamiloApi::getColorPalette(true, true);
 
         $list['datasets'][0]['label'] = get_lang('Tools');
         $list['datasets'][0]['borderColor'] = "rgba(255,255,255,1)";
@@ -173,7 +165,7 @@ switch ($action) {
         foreach ($all as $tick => $tock) {
             $j = $i % count($palette);
             $list['datasets'][0]['data'][] = $tock;
-            $list['datasets'][0]['backgroundColor'][] = 'rgba('.$palette[$j].')';
+            $list['datasets'][0]['backgroundColor'][] = $palette[$j];
             $i++;
         }
 
diff --git a/src/Chamilo/CoreBundle/Component/Utils/ChamiloApi.php b/src/Chamilo/CoreBundle/Component/Utils/ChamiloApi.php
index 3f30a2737a..076379a37f 100644
--- a/src/Chamilo/CoreBundle/Component/Utils/ChamiloApi.php
+++ b/src/Chamilo/CoreBundle/Component/Utils/ChamiloApi.php
@@ -289,4 +289,33 @@ class ChamiloApi
 
         return api_get_path(WEB_CSS_PATH).'editor_content.css';
     }
+    /**
+     * Get a list of colors from the palette at main/palette/pchart/default.color
+     * and return it as an array of strings
+     * @param bool $decimalOpacity Whether to return the opacity as 0..100 or 0..1
+     * @param bool $wrapInRGBA Whether to return it as 1,1,1,100 or rgba(1,1,1,100)
+     * @return array An array of string colors
+     */
+    public static function getColorPalette($decimalOpacity = false, $wrapInRGBA = false)
+    {
+        // Get the common colors from the palette used for pchart
+        $paletteFile = api_get_path(SYS_CODE_PATH).'palettes/pchart/default.color';
+        $palette = file($paletteFile);
+        if ($decimalOpacity) {
+            // Because the pchart palette has transparency as integer values
+            // (0..100) and chartjs uses percentage (0.0..1.0), we need to divide
+            // the last value by 100, which is a bit overboard for just one chart
+            foreach ($palette as $index => $color) {
+                $components = preg_split('/,/', trim($color));
+                $components[3] = round($components[3] / 100, 1);
+                $palette[$index] = join(',', $components);
+            }
+        }
+        if ($wrapInRGBA) {
+            foreach ($palette as $index => $color) {
+                $palette[$index] = 'rgba('.$palette[$index].')';
+            }
+        }
+        return $palette;
+    }
 }