From 9249e3ab4eb3cda10080b957d96d7ad55fd8e638 Mon Sep 17 00:00:00 2001
From: thetrinity <thetrinity>
Date: Sat, 10 Jan 2004 09:39:28 +0000
Subject: [PATCH] Fixed typo

---
 mod/quiz/format/gift/docs.html    | 2 --
 mod/quiz/format/gift/examples.txt | 2 +-
 mod/quiz/format/gift/format.php   | 2 +-
 3 files changed, 2 insertions(+), 4 deletions(-)
 delete mode 100755 mod/quiz/format/gift/docs.html

diff --git a/mod/quiz/format/gift/docs.html b/mod/quiz/format/gift/docs.html
deleted file mode 100755
index b7de1f0421..0000000000
--- a/mod/quiz/format/gift/docs.html
+++ /dev/null
@@ -1,2 +0,0 @@
-this file discontinued
-(moved to help files)
\ No newline at end of file
diff --git a/mod/quiz/format/gift/examples.txt b/mod/quiz/format/gift/examples.txt
index 0a20f6aec7..fa95be6d2b 100644
--- a/mod/quiz/format/gift/examples.txt
+++ b/mod/quiz/format/gift/examples.txt
@@ -1 +1 @@
-//  EXAMPLE QUESTIONS for the GIFT import filter
//  by Paul Tsuchido Shew, January 2004.

//-----------------------------------------//
//        EXAMPLES FROM DESCRIPTION
//-----------------------------------------//

Who's buried in Grant's tomb?{~Grant ~Jefferson =no one}

Grant is {~buried =entombed ~living} in Grant's tomb.

Grant is buried in Grant's tomb.{FALSE}

Who's buried in Grant's tomb?{=no one =nobody}

When was Ulysses S. Grant born?{#1922:1}


//-----------------------------------------//
//       EXAMPLES FROM DOCUMENTATION
//-----------------------------------------//

// ===Multiple Choice===

Who's buried in Grant's tomb?{~Grant ~Jefferson =no one}

Grant is {~buried =entombed ~living} in Grant's tomb.

The American holiday of Thanksgiving is celebrated on the {
    ~second
    ~third
    =fourth
} Thursday of November.

Japanese characters originally came from what country? {
    ~India
    =China
    ~Korea
    ~Egypt}

// ===Short Answer===

Who's buried in Grant's tomb?{=no one =nobody}

Two plus two equals {=four =4}.

// ===True-False===

Grant is buried in Grant's tomb.{F}

The sun rises in the east.{T}

// ===Numerical===

When was Ulysses S. Grant born? {#1922}

What is the value of pi (to 3 decimal places)? {#3.1415:0.0005}.

What is the value of pi (to 3 decimal places)? {#3.141..3.142}.

When was Ulysses S. Grant born? {#
    =1922:0
    =%50%1922:2}

// OPTIONS 

// ===Inline Comments===

// Subheading: Numerical questions below
What's 2 plus 2? {#4}


// ===Question Name===

::Kanji Origins::Japanese characters originally
came from what country? {=China}

::Thanksgiving Date::The American holiday of Thanksgiving is 
celebrated on the {~second ~third =fourth} Thursday of November.

// ===Feedback===

What's the answer to this multiple-choice question?{
~wrong answer#feedback comment on the wrong answer
~another wrong answer#feedback comment on this wrong answer
=right answer#Very good!}
    
Who's buried in Grant's tomb?{
=no one#excellent answer!
=nobody#excellent answer!}

// ===Percentage Answer Weights===
Grant is buried in Grant's tomb.{FALSE#No one is buried in Grant's tomb.}

Difficult question.{~wrong answer ~%50%half credit answer =full credit answer}
         
::Jesus' hometown::Jesus Christ was from {
    ~Jerusalem#This was an important city, but the wrong answer.
    ~%25%Bethlehem#He was born here, but not raised here.
    ~%50%Galilee#You need to be more specific.
    =Nazareth#Yes! That's right!}.
    
::Jesus' hometown:: Jesus Christ was from {
    =Nazareth#Yes! That's right!
    =%75%Nazereth#Right, but misspelled.
    =%25%Bethlehem#He was born here, but not raised here.}

// ===Multiple Answers===

What two people are entombed in Grant's tomb? {
	~No one
	~%50%Grant
	~%50%Grant's wife
	~Grant's father }

What two people are entombed in Grant's tomb? {
	~%-50%No one
	~%50%Grant
	~%50%Grant's wife
	~%-50%Grant's father }

//-----------------------------------------//
//     EXAMPLES FROM gift/format.php
//-----------------------------------------//

::Grant's Tomb::Grant is {
      ~buried#No one is buried there.
      =entombed#Right answer!
      ~living#We hope not!
} in Grant's tomb.

Difficult multiple choice question.{
     ~wrong answer           #comment on wrong answer
     ~%50%half credit answer #comment on answer
     =full credit answer     #well done!}

::Jesus' hometown (Short answer ex.):: Jesus Christ was from {
     =Nazareth#Yes! That's right!
     =%75%Nazereth#Right, but misspelled.
     =%25%Bethlehem#He was born here, but not raised here.
}.

//this comment will be ignored by the filter
::Numerical example::
When was Ulysses S. Grant born? {#
     =1922:0      #Correct! 100% credit
     =%50%1922:2  #He was born in 1922.
                  You get 50% credit for being close.
}
\ No newline at end of file
+//  EXAMPLE QUESTIONS for the GIFT import filter
//  by Paul Tsuchido Shew, January 2004.

//-----------------------------------------//
//        EXAMPLES FROM DESCRIPTION
//-----------------------------------------//

Who's buried in Grant's tomb?{~Grant ~Jefferson =no one}

Grant is {~buried =entombed ~living} in Grant's tomb.

Grant is buried in Grant's tomb.{FALSE}

Who's buried in Grant's tomb?{=no one =nobody}

When was Ulysses S. Grant born?{#1822:1}


//-----------------------------------------//
//       EXAMPLES FROM DOCUMENTATION
//-----------------------------------------//

// ===Multiple Choice===

Who's buried in Grant's tomb?{~Grant ~Jefferson =no one}

Grant is {~buried =entombed ~living} in Grant's tomb.

The American holiday of Thanksgiving is celebrated on the {
    ~second
    ~third
    =fourth
} Thursday of November.

Japanese characters originally came from what country? {
    ~India
    =China
    ~Korea
    ~Egypt}

// ===Short Answer===

Who's buried in Grant's tomb?{=no one =nobody}

Two plus two equals {=four =4}.

// ===True-False===

Grant is buried in Grant's tomb.{F}

The sun rises in the east.{T}

// ===Numerical===

When was Ulysses S. Grant born? {#1822}

What is the value of pi (to 3 decimal places)? {#3.1415:0.0005}.

What is the value of pi (to 3 decimal places)? {#3.141..3.142}.

When was Ulysses S. Grant born? {#
    =1822:0
    =%50%1822:2}

// OPTIONS 

// ===Inline Comments===

// Subheading: Numerical questions below
What's 2 plus 2? {#4}


// ===Question Name===

::Kanji Origins::Japanese characters originally
came from what country? {=China}

::Thanksgiving Date::The American holiday of Thanksgiving is 
celebrated on the {~second ~third =fourth} Thursday of November.

// ===Feedback===

What's the answer to this multiple-choice question?{
~wrong answer#feedback comment on the wrong answer
~another wrong answer#feedback comment on this wrong answer
=right answer#Very good!}
    
Who's buried in Grant's tomb?{
=no one#excellent answer!
=nobody#excellent answer!}

// ===Percentage Answer Weights===
Grant is buried in Grant's tomb.{FALSE#No one is buried in Grant's tomb.}

Difficult question.{~wrong answer ~%50%half credit answer =full credit answer}
         
::Jesus' hometown::Jesus Christ was from {
    ~Jerusalem#This was an important city, but the wrong answer.
    ~%25%Bethlehem#He was born here, but not raised here.
    ~%50%Galilee#You need to be more specific.
    =Nazareth#Yes! That's right!}.
    
::Jesus' hometown:: Jesus Christ was from {
    =Nazareth#Yes! That's right!
    =%75%Nazereth#Right, but misspelled.
    =%25%Bethlehem#He was born here, but not raised here.}

// ===Multiple Answers===

What two people are entombed in Grant's tomb? {
	~No one
	~%50%Grant
	~%50%Grant's wife
	~Grant's father }

What two people are entombed in Grant's tomb? {
	~%-50%No one
	~%50%Grant
	~%50%Grant's wife
	~%-50%Grant's father }

//-----------------------------------------//
//     EXAMPLES FROM gift/format.php
//-----------------------------------------//

::Grant's Tomb::Grant is {
      ~buried#No one is buried there.
      =entombed#Right answer!
      ~living#We hope not!
} in Grant's tomb.

Difficult multiple choice question.{
     ~wrong answer           #comment on wrong answer
     ~%50%half credit answer #comment on answer
     =full credit answer     #well done!}

::Jesus' hometown (Short answer ex.):: Jesus Christ was from {
     =Nazareth#Yes! That's right!
     =%75%Nazereth#Right, but misspelled.
     =%25%Bethlehem#He was born here, but not raised here.
}.

//this comment will be ignored by the filter
::Numerical example::
When was Ulysses S. Grant born? {#
     =1822:0      #Correct! 100% credit
     =%50%1822:2  #He was born in 1822.
                  You get 50% credit for being close.
}
\ No newline at end of file
diff --git a/mod/quiz/format/gift/format.php b/mod/quiz/format/gift/format.php
index 90089bfe49..862fbd13ea 100755
--- a/mod/quiz/format/gift/format.php
+++ b/mod/quiz/format/gift/format.php
@@ -1 +1 @@
-<?php // $Id$
//
///////////////////////////////////////////////////////////////
// GIFT
//
// The GIFT import filter is an easy to use method for teachers 
// writing questions as a text file. It supports true-false, 
// short answer, multiple-choice and numerical questions, as well 
// as insertion of a blank line for the missing word format.
//
// Multiple Choice / Missing Word
//     Who's buried in Grant's tomb?{~Grant ~Jefferson =no one}
//     Grant is {~buried =entombed ~living} in Grant's tomb.
// True-False:
//     Grant is buried in Grant's tomb.{FALSE}
// Short-Answer.
//     Who's buried in Grant's tomb?{=no one =nobody}
// Numerical
//     When was Ulysses S. Grant born?{#1922:5}
//
// Comment lines start with a double backslash (//). 
// Optional question names are enclosed in double colon(::). 
// Answer feedback is indicated with hash mark (#).
// Percentage answer weights immediately follow the tilde (for
// multiple choice) or equal sign (for short answer and numerical),
// and are enclosed in percent signs (% %). Below are more
// complicated examples with various options and formatting styles.
// 
//     ::Grant's Tomb::Grant is {
//         ~buried#No one is buried there.
//         =entombed#Right answer!
//         ~living#We hope not!
//     } in Grant's tomb.
//
//     Difficult multiple choice question.{
//         ~wrong answer           #comment on wrong answer
//         ~%50%half credit answer #comment on answer
//         =full credit answer     #well done!}
//
//     ::Jesus' hometown (Short answer ex.):: Jesus Christ was from {
//         =Nazareth#Yes! That's right!
//         =%75%Nazereth#Right, but misspelled.
//         =%25%Bethlehem#He was born here, but not raised here.
//     }.
//
//     //this inline comment will be ignored by the filter
//     ::Numerical example::
//     When was Ulysses S. Grant born? {#
//         =1922:0      #Correct! 100% credit
//         =%50%1922:2  #He was born in 1922.
//                       You get 50% credit for being close.
//      }
// 
// This filter was written through the collaboration of numerous 
// members of the Moodle community. It was originally based on 
// the missingword format, which included code from Thomas Robb
// and others. Paul Tsuchido Shew wrote this filter in December 2003.
//////////////////////////////////////////////////////////////////////////
// Based on default.php, included by ../import.php

class quiz_file_format extends quiz_default_format {

    function answerweightparser(&$answer) {
        $answer = substr($answer, 1);                        // removes initial %
        $end_position  = strpos($answer, "%");
        $answer_weight = substr($answer, 0, $end_position);  // gets weight as integer
        $answer_weight = $answer_weight/100;                 // converts to percent
        $answer = substr($answer, $end_position+1);          // removes comment from answer
        return $answer_weight;
    }


    function commentparser(&$answer) {
        if (strpos($answer,"#") > 0){
            $hashpos = strpos($answer,"#");
            $comment = addslashes(substr($answer, $hashpos+1));
            $answer  = substr($answer, 0, $hashpos);
        } else {
            $comment = " ";
        }
        return $comment;
    }
    

    function readquestion($lines) {
    // Given an array of lines known to define a question in this format, this function
    // converts it into a question object suitable for processing and insertion into Moodle.

        $question = NULL;
        $comment = NULL;
        define("GIFT_ANSWERWEIGHT_REGEX", "^%\-*([0-9]{1,2})\.?([0-9]*)%");        

        // REMOVED COMMENTED LINES and IMPLODE
        foreach ($lines as $key => $line) {
           $line = trim($line);
           if (substr($line, 0, 2) == "//") {
                // echo "Commented line removed.<br />";
                $lines[$key] = " ";
                }
        }

        $text = trim(implode(" ", $lines));

        if ($text == "") {
            // echo "<p>Empty line.</p>";
            return false;
        }

        // QUESTION NAME parser
        if (substr($text, 0, 2) == "::") {
            $text = substr($text, 2);

            $namefinish = strpos($text, "::");
            if ($namefinish === false) {
                $question->name = false;
                // name will be assigned after processing question text below
             } else {
                $question->name = addslashes(trim(substr($text, 0, $namefinish)));
                $text = trim(substr($text, $namefinish+2)); // Remove name from text
            }
        } else {
            $question->name = false;
        }


        // FIND ANSWER section
        $answerstart = strpos($text, "{");
        if ($answerstart === false) {
            if ($this->displayerrors) {
                echo "<P>$text<P>Could not find a {";
            }
            return false;
        }

        $answerfinish = strpos($text, "}");
        if ($answerfinish === false) {
            if ($this->displayerrors) {
                echo "<P>$text<P>Could not find a }";
            }
            return false;
        }

        $answerlength = $answerfinish - $answerstart;
        $answertext = trim(substr($text, $answerstart + 1, $answerlength - 1));

        // Format QUESTION TEXT without answer, inserting "_____" as necessary
        if (substr($text, -1) == "}") {
            // no blank line if answers follow question, outside of closing punctuation
            $question->questiontext = addslashes(trim(substr_replace($text, "", $answerstart, $answerlength+1)));
        } else {
            // inserts blank line for missing word format
            $question->questiontext = addslashes(trim(substr_replace($text, "_____", $answerstart, $answerlength+1)));
        }

        // set question name if not already set
        if ($question->name === false) {
            $question->name = $question->questiontext;
            }


         // determine QUESTION TYPE
        $question->qtype = NULL;

        if ($answertext{0} == "#"){
            $question->qtype = NUMERICAL;

        } elseif (strstr($answertext, "~") !== false)  {
            // only Multiplechoice questions contain tilde ~
            $question->qtype = MULTICHOICE;
    
        } else { // either TRUEFALSE or SHORTANSWER
    
            // TRUEFALSE question check
            $truefalse_check = $answertext;
            if (strpos($answertext,"#") > 0){ 
                // strip comments to check for TrueFalse question
                $truefalse_check = trim(substr($answertext, 0, strpos($answertext,"#")));
            }

            $valid_tf_answers = array("T", "TRUE", "F", "FALSE");
            if (in_array($truefalse_check, $valid_tf_answers)) {
                $question->qtype = TRUEFALSE;

            } else { // Must be SHORTANSWER
                    $question->qtype = SHORTANSWER;
            }
        }

        if (!isset($question->qtype)) {
            if ($this->displayerrors) {
                echo "<P>$text<P>Question type not set.";
                }
            return false;
        }

        switch ($question->qtype) {
            case MULTICHOICE:
                if (strpos($answertext,"=") === false) {
                    $question->single = 0;   // multiple answers are enabled if no single answer is 100% correct                        
                } else {
                    $question->single = 1;   // only one answer allowed (the default)
                }

                $answertext = str_replace("=", "~=", $answertext);
                $answers = explode("~", $answertext);
                if (isset($answers[0])) {
                    $answers[0] = trim($answers[0]);
                }
                if (empty($answers[0])) {
                    array_shift($answers);
                }
    
                $countanswers = count($answers);
                if ($countanswers < 2) {
                    if ($this->displayerrors) {
                        echo "<P>$text<P>Found tilde for multiple choice, 
                            but too few answers for Multiple Choice.<br />
                            Found <u>$countanswers</u> answers in answertext.";
                    }
                    return false;
                    break;
                }
    
                foreach ($answers as $key => $answer) {
                    $answer = trim($answer);

                    // determine answer weight
                    if ($answer[0] == "=") {
                        $answer_weight = 1;
                        $answer = substr($answer, 1);
    
                    } elseif (ereg(GIFT_ANSWERWEIGHT_REGEX, $answer)) {    // check for properly formatted answer weight
                        $answer_weight = $this->answerweightparser($answer);
                    
                    } else {     //default, i.e., wrong anwer
                        $answer_weight = 0;
                    }
                    $question->fraction[$key] = $answer_weight;
                    $question->feedback[$key] = $this->commentparser($answer); // commentparser also removes comment from $answer
                    $question->answer[$key]   = addslashes($answer);    
                }  // end foreach answer
    
                $question->defaultgrade = 1;
                $question->image = "";   // No images with this format
                return $question;
                break;
            
            case TRUEFALSE:
                $answer = $answertext;
                $comment = $this->commentparser($answer); // commentparser also removes comment from $answer

                if ($answer == "T" OR $answer == "TRUE") {
                    $question->answer = 1;
                    $question->feedbackfalse = $comment; //feedback if answer is wrong
                } else {
                    $question->answer = 0;
                    $question->feedbacktrue = $comment; //feedback if answer is wrong
                }
                $question->defaultgrade = 1;
                $question->image = "";   // No images with this format
                return $question;
                break;
                
            case SHORTANSWER:
                // SHORTANSWER Question
                $answers = explode("=", $answertext);
                if (isset($answers[0])) {
                    $answers[0] = trim($answers[0]);
                }
                if (empty($answers[0])) {
                    array_shift($answers);
                }
    
                if (count($answers) == 0) {
                    // invalid question
                    if ($this->displayerrors) {
                        echo "<P>$text<P>Found equals=, but no answers in answertext";
                    }
                    return false;
                    break;
                }

                foreach ($answers as $key => $answer) {
                    $answer = trim($answer);

                    // Answer Weight
                    if (ereg(GIFT_ANSWERWEIGHT_REGEX, $answer)) {    // check for properly formatted answer weight
                        $answer_weight = $this->answerweightparser($answer);
                    } else {     //default, i.e., full-credit anwer
                        $answer_weight = 1;
                    }
                    $question->fraction[$key] = $answer_weight;
                    $question->feedback[$key] = $this->commentparser($answer); //commentparser also removes comment from $answer
                    $question->answer[$key]   = addslashes($answer);
                }     // end foreach

                $question->usecase = 0;  // Ignore case
                $question->defaultgrade = 1;
                $question->image = "";   // No images with this format
                return $question;
                break;

            case NUMERICAL:
                // Note similarities to ShortAnswer
                $answertext = substr($answertext, 1); // remove leading "#"

                $answers = explode("=", $answertext);
                if (isset($answers[0])) {
                    $answers[0] = trim($answers[0]);
                }
                if (empty($answers[0])) {
                    array_shift($answers);
                }
    
                if (count($answers) == 0) {
                    // invalid question
                    if ($this->displayerrors) {
                        echo "<P>$text<P>No answers found in answertext (Numerical answer)";
                    }
                    return false;
                    break;
                }

                foreach ($answers as $key => $answer) {
                    $answer = trim($answer);

                    // Answer weight
                    if (ereg(GIFT_ANSWERWEIGHT_REGEX, $answer)) {    // check for properly formatted answer weight
                        $answer_weight = $this->answerweightparser($answer);
                    } else {     //default, i.e., full-credit anwer
                        $answer_weight = 1;
                    }
                    $question->fraction[$key] = $answer_weight;
                    $question->feedback[$key] = $this->commentparser($answer); //commentparser also removes comment from $answer

                    //Calculate Answer and Min/Max values
                    if (strpos($answer,"..") > 0) { // optional [min]..[max] format
                        $marker                 = strpos($answer,"..");
                        $question->max[$key]    = trim(substr($answer, $marker+2));
                        $question->min[$key]    = trim(substr($answer, 0, $marker));
                        $question->answer[$key] = ($question->max[$key] + $question->min[$key])/2;

                    } elseif (strpos($answer,":") > 0){ // standard [answer]:[errormargin] format
                        $marker                 = strpos($answer,":");
                        $errormargin            = trim(substr($answer, $marker+1));
                        $question->answer[$key] = trim(substr($answer, 0, $marker));
                        $question->max[$key]    = $question->answer[$key] + $errormargin;
                        $question->min[$key]    = $question->answer[$key] - $errormargin;

                    } else { // only one valid answer (zero errormargin)
                        $errormargin = 0;
                        $question->answer[$key] = trim($answer);
                        $question->max[$key]    = $question->answer[$key] + $errormargin;
                        $question->min[$key]    = $question->answer[$key] - $errormargin;
                    }
    
                    if (!is_numeric($question->answer[$key]) 
                     OR !is_numeric($question->max[$key])
                     OR !is_numeric($question->max[$key])) {
                        if ($this->displayerrors) {
                            echo "<P>$text<P>For numerical questions, answer must be numbers.
                                <P>Answer: <u>$answer</u><P>ErrorMargin: <u>$errormargin</u> .";
                        }
                        return false;
                        break;
                    }

                }     // end foreach

                $question->defaultgrade = 1;
                $question->image = "";   // No images with this format
                return $question;
                break;

                default:
                if ($this->displayerrors) {
                    echo "<P>$text<P> No valid question type. Error in switch(question->qtype)";
                }
                return false;
                break;                
        
        } // end switch ($question->qtype)

    }    // end function readquestion($lines)
}

?>
\ No newline at end of file
+<?php // $Id$
//
///////////////////////////////////////////////////////////////
// GIFT
//
// The GIFT import filter is an easy to use method for teachers 
// writing questions as a text file. It supports true-false, 
// short answer, multiple-choice and numerical questions, as well 
// as insertion of a blank line for the missing word format.
//
// Multiple Choice / Missing Word
//     Who's buried in Grant's tomb?{~Grant ~Jefferson =no one}
//     Grant is {~buried =entombed ~living} in Grant's tomb.
// True-False:
//     Grant is buried in Grant's tomb.{FALSE}
// Short-Answer.
//     Who's buried in Grant's tomb?{=no one =nobody}
// Numerical
//     When was Ulysses S. Grant born?{#1822:5}
//
// Comment lines start with a double backslash (//). 
// Optional question names are enclosed in double colon(::). 
// Answer feedback is indicated with hash mark (#).
// Percentage answer weights immediately follow the tilde (for
// multiple choice) or equal sign (for short answer and numerical),
// and are enclosed in percent signs (% %). Below are more
// complicated examples with various options and formatting styles.
// 
//     ::Grant's Tomb::Grant is {
//         ~buried#No one is buried there.
//         =entombed#Right answer!
//         ~living#We hope not!
//     } in Grant's tomb.
//
//     Difficult multiple choice question.{
//         ~wrong answer           #comment on wrong answer
//         ~%50%half credit answer #comment on answer
//         =full credit answer     #well done!}
//
//     ::Jesus' hometown (Short answer ex.):: Jesus Christ was from {
//         =Nazareth#Yes! That's right!
//         =%75%Nazereth#Right, but misspelled.
//         =%25%Bethlehem#He was born here, but not raised here.
//     }.
//
//     //this inline comment will be ignored by the filter
//     ::Numerical example::
//     When was Ulysses S. Grant born? {#
//         =1822:0      #Correct! 100% credit
//         =%50%1982:2  #He was born in 1822.
//                       You get 50% credit for being close.
//      }
// 
// This filter was written through the collaboration of numerous 
// members of the Moodle community. It was originally based on 
// the missingword format, which included code from Thomas Robb
// and others. Paul Tsuchido Shew wrote this filter in December 2003.
//////////////////////////////////////////////////////////////////////////
// Based on default.php, included by ../import.php

class quiz_file_format extends quiz_default_format {

    function answerweightparser(&$answer) {
        $answer = substr($answer, 1);                        // removes initial %
        $end_position  = strpos($answer, "%");
        $answer_weight = substr($answer, 0, $end_position);  // gets weight as integer
        $answer_weight = $answer_weight/100;                 // converts to percent
        $answer = substr($answer, $end_position+1);          // removes comment from answer
        return $answer_weight;
    }


    function commentparser(&$answer) {
        if (strpos($answer,"#") > 0){
            $hashpos = strpos($answer,"#");
            $comment = addslashes(substr($answer, $hashpos+1));
            $answer  = substr($answer, 0, $hashpos);
        } else {
            $comment = " ";
        }
        return $comment;
    }
    

    function readquestion($lines) {
    // Given an array of lines known to define a question in this format, this function
    // converts it into a question object suitable for processing and insertion into Moodle.

        $question = NULL;
        $comment = NULL;
        define("GIFT_ANSWERWEIGHT_REGEX", "^%\-*([0-9]{1,2})\.?([0-9]*)%");        

        // REMOVED COMMENTED LINES and IMPLODE
        foreach ($lines as $key => $line) {
           $line = trim($line);
           if (substr($line, 0, 2) == "//") {
                // echo "Commented line removed.<br />";
                $lines[$key] = " ";
                }
        }

        $text = trim(implode(" ", $lines));

        if ($text == "") {
            // echo "<p>Empty line.</p>";
            return false;
        }

        // QUESTION NAME parser
        if (substr($text, 0, 2) == "::") {
            $text = substr($text, 2);

            $namefinish = strpos($text, "::");
            if ($namefinish === false) {
                $question->name = false;
                // name will be assigned after processing question text below
             } else {
                $question->name = addslashes(trim(substr($text, 0, $namefinish)));
                $text = trim(substr($text, $namefinish+2)); // Remove name from text
            }
        } else {
            $question->name = false;
        }


        // FIND ANSWER section
        $answerstart = strpos($text, "{");
        if ($answerstart === false) {
            if ($this->displayerrors) {
                echo "<P>$text<P>Could not find a {";
            }
            return false;
        }

        $answerfinish = strpos($text, "}");
        if ($answerfinish === false) {
            if ($this->displayerrors) {
                echo "<P>$text<P>Could not find a }";
            }
            return false;
        }

        $answerlength = $answerfinish - $answerstart;
        $answertext = trim(substr($text, $answerstart + 1, $answerlength - 1));

        // Format QUESTION TEXT without answer, inserting "_____" as necessary
        if (substr($text, -1) == "}") {
            // no blank line if answers follow question, outside of closing punctuation
            $question->questiontext = addslashes(trim(substr_replace($text, "", $answerstart, $answerlength+1)));
        } else {
            // inserts blank line for missing word format
            $question->questiontext = addslashes(trim(substr_replace($text, "_____", $answerstart, $answerlength+1)));
        }

        // set question name if not already set
        if ($question->name === false) {
            $question->name = $question->questiontext;
            }


         // determine QUESTION TYPE
        $question->qtype = NULL;

        if ($answertext{0} == "#"){
            $question->qtype = NUMERICAL;

        } elseif (strstr($answertext, "~") !== false)  {
            // only Multiplechoice questions contain tilde ~
            $question->qtype = MULTICHOICE;
    
        } else { // either TRUEFALSE or SHORTANSWER
    
            // TRUEFALSE question check
            $truefalse_check = $answertext;
            if (strpos($answertext,"#") > 0){ 
                // strip comments to check for TrueFalse question
                $truefalse_check = trim(substr($answertext, 0, strpos($answertext,"#")));
            }

            $valid_tf_answers = array("T", "TRUE", "F", "FALSE");
            if (in_array($truefalse_check, $valid_tf_answers)) {
                $question->qtype = TRUEFALSE;

            } else { // Must be SHORTANSWER
                    $question->qtype = SHORTANSWER;
            }
        }

        if (!isset($question->qtype)) {
            if ($this->displayerrors) {
                echo "<P>$text<P>Question type not set.";
                }
            return false;
        }

        switch ($question->qtype) {
            case MULTICHOICE:
                if (strpos($answertext,"=") === false) {
                    $question->single = 0;   // multiple answers are enabled if no single answer is 100% correct                        
                } else {
                    $question->single = 1;   // only one answer allowed (the default)
                }

                $answertext = str_replace("=", "~=", $answertext);
                $answers = explode("~", $answertext);
                if (isset($answers[0])) {
                    $answers[0] = trim($answers[0]);
                }
                if (empty($answers[0])) {
                    array_shift($answers);
                }
    
                $countanswers = count($answers);
                if ($countanswers < 2) {
                    if ($this->displayerrors) {
                        echo "<P>$text<P>Found tilde for multiple choice, 
                            but too few answers for Multiple Choice.<br />
                            Found <u>$countanswers</u> answers in answertext.";
                    }
                    return false;
                    break;
                }
    
                foreach ($answers as $key => $answer) {
                    $answer = trim($answer);

                    // determine answer weight
                    if ($answer[0] == "=") {
                        $answer_weight = 1;
                        $answer = substr($answer, 1);
    
                    } elseif (ereg(GIFT_ANSWERWEIGHT_REGEX, $answer)) {    // check for properly formatted answer weight
                        $answer_weight = $this->answerweightparser($answer);
                    
                    } else {     //default, i.e., wrong anwer
                        $answer_weight = 0;
                    }
                    $question->fraction[$key] = $answer_weight;
                    $question->feedback[$key] = $this->commentparser($answer); // commentparser also removes comment from $answer
                    $question->answer[$key]   = addslashes($answer);    
                }  // end foreach answer
    
                $question->defaultgrade = 1;
                $question->image = "";   // No images with this format
                return $question;
                break;
            
            case TRUEFALSE:
                $answer = $answertext;
                $comment = $this->commentparser($answer); // commentparser also removes comment from $answer

                if ($answer == "T" OR $answer == "TRUE") {
                    $question->answer = 1;
                    $question->feedbackfalse = $comment; //feedback if answer is wrong
                } else {
                    $question->answer = 0;
                    $question->feedbacktrue = $comment; //feedback if answer is wrong
                }
                $question->defaultgrade = 1;
                $question->image = "";   // No images with this format
                return $question;
                break;
                
            case SHORTANSWER:
                // SHORTANSWER Question
                $answers = explode("=", $answertext);
                if (isset($answers[0])) {
                    $answers[0] = trim($answers[0]);
                }
                if (empty($answers[0])) {
                    array_shift($answers);
                }
    
                if (count($answers) == 0) {
                    // invalid question
                    if ($this->displayerrors) {
                        echo "<P>$text<P>Found equals=, but no answers in answertext";
                    }
                    return false;
                    break;
                }

                foreach ($answers as $key => $answer) {
                    $answer = trim($answer);

                    // Answer Weight
                    if (ereg(GIFT_ANSWERWEIGHT_REGEX, $answer)) {    // check for properly formatted answer weight
                        $answer_weight = $this->answerweightparser($answer);
                    } else {     //default, i.e., full-credit anwer
                        $answer_weight = 1;
                    }
                    $question->fraction[$key] = $answer_weight;
                    $question->feedback[$key] = $this->commentparser($answer); //commentparser also removes comment from $answer
                    $question->answer[$key]   = addslashes($answer);
                }     // end foreach

                $question->usecase = 0;  // Ignore case
                $question->defaultgrade = 1;
                $question->image = "";   // No images with this format
                return $question;
                break;

            case NUMERICAL:
                // Note similarities to ShortAnswer
                $answertext = substr($answertext, 1); // remove leading "#"

                $answers = explode("=", $answertext);
                if (isset($answers[0])) {
                    $answers[0] = trim($answers[0]);
                }
                if (empty($answers[0])) {
                    array_shift($answers);
                }
    
                if (count($answers) == 0) {
                    // invalid question
                    if ($this->displayerrors) {
                        echo "<P>$text<P>No answers found in answertext (Numerical answer)";
                    }
                    return false;
                    break;
                }

                foreach ($answers as $key => $answer) {
                    $answer = trim($answer);

                    // Answer weight
                    if (ereg(GIFT_ANSWERWEIGHT_REGEX, $answer)) {    // check for properly formatted answer weight
                        $answer_weight = $this->answerweightparser($answer);
                    } else {     //default, i.e., full-credit anwer
                        $answer_weight = 1;
                    }
                    $question->fraction[$key] = $answer_weight;
                    $question->feedback[$key] = $this->commentparser($answer); //commentparser also removes comment from $answer

                    //Calculate Answer and Min/Max values
                    if (strpos($answer,"..") > 0) { // optional [min]..[max] format
                        $marker                 = strpos($answer,"..");
                        $question->max[$key]    = trim(substr($answer, $marker+2));
                        $question->min[$key]    = trim(substr($answer, 0, $marker));
                        $question->answer[$key] = ($question->max[$key] + $question->min[$key])/2;

                    } elseif (strpos($answer,":") > 0){ // standard [answer]:[errormargin] format
                        $marker                 = strpos($answer,":");
                        $errormargin            = trim(substr($answer, $marker+1));
                        $question->answer[$key] = trim(substr($answer, 0, $marker));
                        $question->max[$key]    = $question->answer[$key] + $errormargin;
                        $question->min[$key]    = $question->answer[$key] - $errormargin;

                    } else { // only one valid answer (zero errormargin)
                        $errormargin = 0;
                        $question->answer[$key] = trim($answer);
                        $question->max[$key]    = $question->answer[$key] + $errormargin;
                        $question->min[$key]    = $question->answer[$key] - $errormargin;
                    }
    
                    if (!is_numeric($question->answer[$key]) 
                     OR !is_numeric($question->max[$key])
                     OR !is_numeric($question->max[$key])) {
                        if ($this->displayerrors) {
                            echo "<P>$text<P>For numerical questions, answer must be numbers.
                                <P>Answer: <u>$answer</u><P>ErrorMargin: <u>$errormargin</u> .";
                        }
                        return false;
                        break;
                    }

                }     // end foreach

                $question->defaultgrade = 1;
                $question->image = "";   // No images with this format
                return $question;
                break;

                default:
                if ($this->displayerrors) {
                    echo "<P>$text<P> No valid question type. Error in switch(question->qtype)";
                }
                return false;
                break;                
        
        } // end switch ($question->qtype)

    }    // end function readquestion($lines)
}

?>
\ No newline at end of file
-- 
2.39.5