From aa49d9ec7aaa79cc42043224386ffc30bf7c7b0f Mon Sep 17 00:00:00 2001
From: Kore Nordmann <github@kore-nordmann.de>
Date: Thu, 24 May 2007 12:29:24 +0000
Subject: - Fixed issue #10842: Pie charts fatal error with datasets with value
 sum <= 0

---
 src/charts/pie.php              | 12 +++++++++++-
 src/datasets/array.php          |  6 ++++++
 src/exceptions/invalid_data.php | 25 +++++++++++++++++++++++++
 src/graph_autoload.php          |  1 +
 4 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 src/exceptions/invalid_data.php

(limited to 'src')

diff --git a/src/charts/pie.php b/src/charts/pie.php
index 782ad32..4d616c8 100644
--- a/src/charts/pie.php
+++ b/src/charts/pie.php
@@ -86,8 +86,13 @@ class ezcGraphPieChart extends ezcGraphChart
 
         // Calculate sum of all values to be able to calculate percentage
         $sum = 0;
-        foreach ( $dataset as $value )
+        foreach ( $dataset as $name => $value )
         {
+            if ( $value <= 0 )
+            {
+                throw new ezcGraphInvalidDataException( "Values > 0 required, '$name' => '$value'." );
+            }
+
             $sum += $value;
         }
         if ( $this->options->sum !== false )
@@ -95,6 +100,11 @@ class ezcGraphPieChart extends ezcGraphChart
             $sum = max( $sum, $this->options->sum );
         }
 
+        if ( $sum <= 0 )
+        {
+            throw new ezcGraphInvalidDataException( "Pie charts require a value sum > 0, your value: '$sum'." );
+        }
+
         $angle = 0;
         foreach ( $dataset as $label => $value )
         {
diff --git a/src/datasets/array.php b/src/datasets/array.php
index 3340cd0..ee7f0df 100644
--- a/src/datasets/array.php
+++ b/src/datasets/array.php
@@ -44,10 +44,16 @@ class ezcGraphArrayDataSet extends ezcGraphDataSet
             throw new ezcGraphInvalidArrayDataSourceException( $data );
         }
 
+        $this->data = array();
         foreach ( $data as $key => $value )
         {
             $this->data[$key] = $value;
         }
+
+        if ( !count( $this->data ) )
+        {
+            throw new ezcGraphInvalidDataException( 'Data sets should contain some values.' );
+        }
     }
 
     /**
diff --git a/src/exceptions/invalid_data.php b/src/exceptions/invalid_data.php
new file mode 100644
index 0000000..4c8f3f2
--- /dev/null
+++ b/src/exceptions/invalid_data.php
@@ -0,0 +1,25 @@
+<?php
+/**
+ * File containing the ezcGraphInvalidDataException class
+ *
+ * @package Graph
+ * @version //autogen//
+ * @copyright Copyright (C) 2005-2007 eZ systems as. All rights reserved.
+ * @license http://ez.no/licenses/new_bsd New BSD License
+ */
+/**
+ * Exception thrown when invalid data is provided, which cannot be rendered 
+ * for some reason.
+ *
+ * @package Graph
+ * @version //autogen//
+ */
+class ezcGraphInvalidDataException extends ezcGraphException
+{
+    public function __construct( $message )
+    {
+        parent::__construct( "You provided unusable data: '$message'." );
+    }
+}
+
+?>
diff --git a/src/graph_autoload.php b/src/graph_autoload.php
index 12aea2b..5bc8507 100644
--- a/src/graph_autoload.php
+++ b/src/graph_autoload.php
@@ -36,6 +36,7 @@ return array(
     'ezcGraphUnknownColorDefinitionException'       => 'Graph/exceptions/unknown_color_definition.php',
     'ezcGraphUnknownFontTypeException'              => 'Graph/exceptions/font_type.php',
     'ezcGraphUnregularStepsException'               => 'Graph/exceptions/unregular_steps.php',
+    'ezcGraphInvalidDataException'                  => 'Graph/exceptions/invalid_data.php',
     'ezcGraphChart'                                 => 'Graph/interfaces/chart.php',
     'ezcGraphChartElement'                          => 'Graph/interfaces/element.php',
     'ezcGraphChartOptions'                          => 'Graph/options/chart.php',
-- 
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