-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathtopic.php
206 lines (187 loc) · 7.23 KB
/
topic.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
<?php
session_start();
require_once("connect.php");
if (!isset($_SESSION["username"])) {
header("Location: login.php");
exit();
}
if (isset($_GET["id"])) {
$topic_id = $_GET["id"];
try {
// Fetch topic details
$topic_query = "SELECT title FROM topics WHERE id = :topic_id";
$stmt = $pdo->prepare($topic_query);
$stmt->bindParam(':topic_id', $topic_id);
$stmt->execute();
// Check if the query executed successfully and if there is a valid topic
if ($stmt->rowCount() > 0) {
$topic = $stmt->fetch(PDO::FETCH_ASSOC);
} else {
echo "Topic not found";
exit();
}
// Set up pagination
$page = isset($_GET['page']) ? $_GET['page'] : 1;
$questions_per_page = 5;
$offset = ($page - 1) * $questions_per_page;
// Fetch questions related to the selected topic along with the last reply information
$questions_query = "
SELECT
q.id,
q.title,
u.username AS last_reply_username,
r.timestamp AS last_reply_timestamp
FROM
questions q
LEFT JOIN
(SELECT
question_id,
MAX(timestamp) AS timestamp
FROM
replies
GROUP BY
question_id) r
ON
q.id = r.question_id
LEFT JOIN
replies lr
ON
lr.question_id = q.id AND lr.timestamp = r.timestamp
LEFT JOIN
user u
ON
u.id = lr.user_id
WHERE
q.topic_id = :topic_id
ORDER BY
q.id DESC
LIMIT
:offset, :questions_per_page
";
$stmt = $pdo->prepare($questions_query);
$stmt->bindParam(':topic_id', $topic_id);
$stmt->bindParam(':offset', $offset, PDO::PARAM_INT);
$stmt->bindParam(':questions_per_page', $questions_per_page, PDO::PARAM_INT);
$stmt->execute();
$questions = $stmt->fetchAll(PDO::FETCH_ASSOC);
// Count the total number of questions for this topic
$count_query = "SELECT COUNT(*) FROM questions WHERE topic_id = :topic_id";
$stmt = $pdo->prepare($count_query);
$stmt->bindParam(':topic_id', $topic_id);
$stmt->execute();
$total_questions = $stmt->fetchColumn();
$total_pages = ceil($total_questions / $questions_per_page);
} catch (PDOException $e) {
echo "Error: " . $e->getMessage();
exit();
}
} else {
echo "Invalid topic ID";
exit();
}
// Handle posting new questions
if (isset($_POST["submit"])) {
$new_question_title = $_POST["new_question_title"];
$new_question_content = $_POST["new_question_content"];
$user_id = $_SESSION["user_id"]; // Retrieve user ID from the session
if ($new_question_title && $new_question_content) {
try {
// Insert the new question into the 'questions' table
$query = "INSERT INTO questions (title, content, user_id, topic_id) VALUES (:title, :content, :user_id, :topic_id)";
$stmt = $pdo->prepare($query);
$stmt->bindParam(':title', $new_question_title);
$stmt->bindParam(':content', $new_question_content);
$stmt->bindParam(':user_id', $user_id);
$stmt->bindParam(':topic_id', $topic_id);
if ($stmt->execute()) {
header("Location: topic.php?id=$topic_id"); // Redirect to the topic page after posting
exit();
} else {
echo "Error creating the question.";
}
} catch (PDOException $e) {
echo "Error: " . $e->getMessage();
}
} else {
echo "Please fill in both title and content fields.";
}
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Topic -
<?php echo $topic['title']; ?>
</title>
<?php include("header.php"); ?>
</head>
<body>
<div>
<h1 class="topic-title">
<?php echo $topic['title']; ?>
</h1>
</div>
<div class="container">
<!-- Add a button to post a new question -->
<div style="text-align: right; margin-bottom: 1rem;">
<a href="new_question.php?topic_id=<?php echo $topic_id; ?>" class="btn">Post Question</a>
</div>
<!-- Display a list of questions related to this topic -->
<h2>Questions</h2>
<ul>
<?php foreach ($questions as $question): ?>
<a href="question.php?id=<?php echo $question['id']; ?>">
<div class="card">
<li>
<div class="name">
<?php echo $question['title']; ?>
</div>
<?php if ($question['last_reply_username'] && $question['last_reply_timestamp']): ?>
<div class="replies">
Last Reply by
<?php echo $question['last_reply_username']; ?> on
<?php echo $question['last_reply_timestamp']; ?>
</div>
<?php else: ?>
<div class="replies">No replies yet.</div>
<?php endif; ?>
</li>
</div>
</a>
<?php endforeach; ?>
</ul>
<!-- Add pagination links -->
<?php if ($total_pages > 1): ?>
<ul class="pagination">
<?php if ($page > 1): ?>
<li class="page-item">
<a href="topic.php?id=<?php echo $topic_id; ?>&page=<?php echo $page - 1; ?>">Previous</a>
</li>
<?php endif; ?>
<?php for ($i = 1; $i <= $total_pages; $i++): ?>
<?php if ($i == $page): ?>
<li class="page-item">
<span class="current-page">
<?php echo $i; ?>
</span>
</li>
<?php else: ?>
<li class="page-item">
<a href="topic.php?id=<?php echo $topic_id; ?>&page=<?php echo $i; ?>">
<?php echo $i; ?>
</a>
</li>
<?php endif; ?>
<?php endfor; ?>
<?php if ($page < $total_pages): ?>
<li class="page-item">
<a href="topic.php?id=<?php echo $topic_id; ?>&page=<?php echo $page + 1; ?>">Next</a>
</li>
<?php endif; ?>
</ul>
<?php endif; ?>
</div>
</body>
</html>