From da354f87730b1fff17aefac8ce5a1979ccfd5300 Mon Sep 17 00:00:00 2001
From: Matt Ryan <mryan@carleton.edu>
Date: Fri, 1 Dec 2017 15:42:39 -0600
Subject: [PATCH] Added maxGradeLevel parameter to override hardcoded max grade
 level of 12

---
 .../TextStatistics/TextStatistics.php         | 31 ++++++++++++++++---
 1 file changed, 27 insertions(+), 4 deletions(-)

diff --git a/src/DaveChild/TextStatistics/TextStatistics.php b/src/DaveChild/TextStatistics/TextStatistics.php
index a32e225..7460a3a 100644
--- a/src/DaveChild/TextStatistics/TextStatistics.php
+++ b/src/DaveChild/TextStatistics/TextStatistics.php
@@ -43,6 +43,12 @@ class TextStatistics
      * by object, if set
      */
     protected $strEncoding = '';
+    
+    /**
+     * @var Maximum grade level to be reported. Calculated grades above 
+     * this level will be returned as this value.
+     */
+    protected $maxGradeLevel = 12;
 
     /**
      * @var bool $normalise Should the result be normalised?
@@ -100,6 +106,23 @@ public function setEncoding($strEncoding)
         $this->strEncoding = $strEncoding;
         return true;
     }
+    
+    /**
+     * Set the maximum grade level for grade-level type indexes
+     * (Flesch-Kincaid Grade Level, Gunning-Fog, Coleman-Liau, SMOG, Automated Readability)
+     * @param	integer	$maxGradeLevel	Grade level to use
+     * @return	boolean	Success
+     */
+    public function setMaxGradeLevel($maxGradeLevel)
+    {
+        $maxGradeLevel = (integer) $maxGradeLevel;
+        if( $maxGradeLevel )
+        {
+        	$this->maxGradeLevel = $maxGradeLevel;
+        	return true;
+        }
+        return false;
+    }
 
     /**
      * Gives the Flesch-Kincaid Reading Ease of text entered rounded to one digit
@@ -163,7 +186,7 @@ public function fleschKincaidGradeLevel($strText = false)
         );
 
         if ($this->normalise) {
-            return Maths::normaliseScore($score, 0, 12, $this->dps);
+            return Maths::normaliseScore($score, 0, $this->maxGradeLevel, $this->dps);
         } else {
             return Maths::bcCalc($score, '+', 0, true, $this->dps);
         }
@@ -231,7 +254,7 @@ public function colemanLiauIndex($strText = false)
         );
 
         if ($this->normalise) {
-            return Maths::normaliseScore($score, 0, 12, $this->dps);
+            return Maths::normaliseScore($score, 0, $this->maxGradeLevel, $this->dps);
         } else {
             return Maths::bcCalc($score, '+', 0, true, $this->dps);
         }
@@ -269,7 +292,7 @@ public function smogIndex($strText = false)
         );
 
         if ($this->normalise) {
-            return Maths::normaliseScore($score, 0, 12, $this->dps);
+            return Maths::normaliseScore($score, 0, $this->maxGradeLevel, $this->dps);
         } else {
             return Maths::bcCalc($score, '+', 0, true, $this->dps);
         }
@@ -311,7 +334,7 @@ public function automatedReadabilityIndex($strText = false)
         );
 
         if ($this->normalise) {
-            return Maths::normaliseScore($score, 0, 12, $this->dps);
+            return Maths::normaliseScore($score, 0, $this->maxGradeLevel, $this->dps);
         } else {
             return Maths::bcCalc($score, '+', 0, true, $this->dps);
         }