<?php
/*
=========================================================
EXAM-GATE ENTERPRISE
---------------------------------------------------------
File:
admin/edit_question.php

Version:
3.0.0

Description:
Edit Existing Question

Compatible:
JSON Edition

Author:
Zamex Link Limited
=========================================================
*/
require_once "../config/core.php";
/*
=========================================================
SESSION SECURITY
=========================================================
*/

if(!isLoggedIn())
{
    header("Location:login.php");
    exit;
}

/*
=========================================================
VALIDATE PARAMETERS
=========================================================
*/

if(
    !isset($_GET["exam"])
    ||
    trim($_GET["exam"])==""
)
{
    die("No Examination Selected.");
}

if(
    !isset($_GET["question"])
    ||
    trim($_GET["question"])==""
)
{
    die("Question Not Specified.");
}

$examID = trim($_GET["exam"]);

$questionFileName = basename(trim($_GET["question"]));

$examFolder = EXAMS_PATH . "/" . $examID;

if(!is_dir($examFolder))
{
    die("Invalid Examination.");
}

/*
=========================================================
QUESTION FILE
=========================================================
*/

$questionFolder =
$examFolder .
"/QUESTIONS-" .
$examID;

$questionFile =
$questionFolder .
"/" .
$questionFileName;

if(!file_exists($questionFile))
{
    die("Question File Not Found.");
}

/*
=========================================================
LOAD QUESTION
=========================================================
*/

$q = read_json($questionFile);

if(!$q)
{
    die("Unable To Read Question.");
}

/*
=========================================================
LOAD EXAM
=========================================================
*/

$examFile =
$examFolder .
"/exam.json";

$exam = read_json($examFile);

?>
<!DOCTYPE html>

<html lang="en">

<head>

<meta charset="UTF-8">

<meta
name="viewport"
content="width=device-width, initial-scale=1.0">

<title>

Edit Question

</title>

<link
rel="stylesheet"
href="../assets/css/examgate.css">

<script
src="../assets/js/examgate.js"></script>

</head>

<body>

<div class="wrapper">

<div class="header">

<h1>

EXAM-GATE ENTERPRISE

</h1>

<p>

Edit Existing Question

</p>

</div>

<div class="container">

<h2 class="page-title">

Edit Question

</h2>

<p class="subtitle">

Exam ID:

<strong>

<?php echo htmlspecialchars($examID); ?>

</strong>

</p>

<div class="card">

<div class="grid grid-2">

<div>

<h3 class="card-title">

Examination

</h3>

<p>

<strong>School:</strong>

<?php echo htmlspecialchars($exam["school"] ?? ""); ?>

</p>

<p>

<strong>Subject:</strong>

<?php echo htmlspecialchars($exam["subject"] ?? ""); ?>

</p>

<p>

<strong>Class:</strong>

<?php echo htmlspecialchars($exam["class"] ?? ""); ?>

</p>

</div>

<div>

<h3 class="card-title">

Question Information

</h3>

<p>

<strong>Question Number:</strong>

<?php echo htmlspecialchars($q["question_number"] ?? ""); ?>

</p>

<p>

<strong>Question ID:</strong>

<?php echo htmlspecialchars($q["question_id"]); ?>

</p>

<p>

<strong>Type:</strong>

<?php echo htmlspecialchars($q["type"]); ?>

</p>

<p>

<strong>Last Modified:</strong>

<?php echo htmlspecialchars($q["last_modified"] ?? ""); ?>

</p>

</div>

</div>

</div>

<form
method="post"
action="save_question.php"
enctype="multipart/form-data"
id="editQuestionForm">

<input
type="hidden"
name="edit_mode"
value="1">

<input
type="hidden"
name="overwrite"
value="1">

<input
type="hidden"
name="exam_id"
value="<?php echo htmlspecialchars($examID); ?>">

<div class="builder-layout">

<!-- ===========================================
CENTER PANEL
=========================================== -->

<div class="center-panel">

<div class="card">

<h3 class="card-title">

Edit Question

</h3>

<div class="form-group">

<label>

Question ID

</label>

<input
type="text"
name="question_id"
value="<?php echo htmlspecialchars($q["question_id"]); ?>"
readonly>

</div>

<div class="form-group">

<label>

Question Number

</label>

<input
type="number"
name="question_number"
min="1"
value="<?php echo htmlspecialchars($q["question_number"] ?? 1); ?>">

</div>

<div class="form-group">

<label>

Question Type

</label>

<select
name="type"
id="questionType"
onchange="setQuestionType(this.value)">

<?php

$types = [

"MCQ"=>"Multiple Choice",
"TRUE_FALSE"=>"True / False",
"FILL_BLANK"=>"Fill in the Blank",
"SHORT"=>"Short Answer",
"ESSAY"=>"Essay",
"PRACTICAL"=>"Practical / Project",
"IMAGE"=>"Image Based"

];

foreach($types as $value=>$label)
{

$selected =
($q["type"]==$value)
?
"selected"
:
"";

echo "<option value=\"$value\" $selected>$label</option>";

}

?>

</select>

</div>

<div class="form-group">

<label>

Question

</label>

<textarea
name="question"
rows="5"
required><?php echo htmlspecialchars($q["question"]); ?></textarea>

</div>

<!-- MCQ -->

<div id="mcqSection" class="section">

<div class="form-group">
<label>Option A</label>
<input type="text" name="option_a"
value="<?php echo htmlspecialchars($q["option_a"] ?? ""); ?>">
</div>

<div class="form-group">
<label>Option B</label>
<input type="text" name="option_b"
value="<?php echo htmlspecialchars($q["option_b"] ?? ""); ?>">
</div>

<div class="form-group">
<label>Option C</label>
<input type="text" name="option_c"
value="<?php echo htmlspecialchars($q["option_c"] ?? ""); ?>">
</div>

<div class="form-group">
<label>Option D</label>
<input type="text" name="option_d"
value="<?php echo htmlspecialchars($q["option_d"] ?? ""); ?>">
</div>

<div class="form-group">
<label>Option E</label>
<input type="text" name="option_e"
value="<?php echo htmlspecialchars($q["option_e"] ?? ""); ?>">
</div>

<div class="form-group">

<label>

Correct Answer

</label>

<select name="correct_answer">

<?php

foreach(["A","B","C","D","E"] as $answer)
{

$selected =
(($q["correct_answer"] ?? "")==$answer)
?
"selected"
:
"";

echo "<option value=\"$answer\" $selected>$answer</option>";

}

?>

</select>

</div>

</div>

<!-- The remaining sections (True/False, Fill Blank, Short Answer,
Essay, Practical, Image) follow the same structure as
question_builder.php, with their values pre-filled from $q. -->

<div class="form-group">

<label>

Marks

</label>

<input
type="number"
name="marks"
min="1"
value="<?php echo htmlspecialchars($q["marks"] ?? 1); ?>">

</div>

<div class="form-group">

<label>

Replace Image (Optional)

</label>

<input
type="file"
name="question_image"
accept="image/*">

</div>

<?php if(!empty($q["image"])): ?>

<p>

Current Image:

<strong><?php echo htmlspecialchars($q["image"]); ?></strong>

</p>

<?php endif; ?>

<div style="margin-top:25px;">

<button
type="submit"
class="btn btn-success">

💾 Update Question

</button>

<a
href="question_manager.php?exam=<?php echo urlencode($examID); ?>"
class="btn btn-info">

📋 Question Manager

</a>

<a
href="dashboard.php?exam=<?php echo urlencode($examID); ?>"
class="btn btn-warning">

🏠 Dashboard

</a>

</div>

</div>

</div>

</div>

</form>

<script>

document.addEventListener("DOMContentLoaded",function(){

setQuestionType(
"<?php echo addslashes($q["type"]); ?>"
);

});

</script>

</body>

</html>