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feat(problemset): add hardness filter and improve query parameter handling

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- Added hardness filter dropdown in problemset UI with options 1-8
- Implemented server-side hardness parameter validation and filtering
- Refactored query parameter handling to use $filter_params array
- Updated SQL queries to use parameter binding for both search and hardness filters
- Fixed pagination to include hardness parameter in URL
- Improved code organization by centralizing filter parameter management
This commit is contained in:
klarkxy
2026-03-13 15:03:46 +08:00
parent 3f6db1935a
commit 60f1532eb8
2 changed files with 54 additions and 58 deletions
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20
web/problemset.php
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@@ -41,9 +41,18 @@ $postfix = "";
$filter_sql = "";
$limit_sql = "";
$order_by = " order by problem_id ";
$filter_params = array();
$hardness = 0;
if (isset($_GET['hardness'])) {
$hardness = intval($_GET['hardness']);
if ($hardness < 1 || $hardness > 8)
$hardness = 0;
}
if (isset($_GET['search']) && trim($_GET['search']) != "") {
$search = "%" . ($_GET['search']) . "%";
$filter_sql = " ( title like ? or source like ?)";
$filter_params[] = $search;
$filter_params[] = $search;
$limit_sql = " LIMIT " . ($page - 1) * $page_cnt . "," . $page_cnt;
$postfix = "&search=" . urlencode($_GET['search']);
} else if (isset($_GET['list']) && trim($_GET['list'] != "")) {
@@ -61,6 +70,11 @@ if (isset($_GET['search']) && trim($_GET['search']) != "") {
$filter_sql = " 1";
$limit_sql = " LIMIT " . ($page - 1) * $page_cnt . "," . $page_cnt;
}
if ($hardness > 0) {
$filter_sql .= " and hardness=?";
$filter_params[] = $hardness;
$postfix .= "&hardness=" . $hardness;
}
//all submit
//all acc
@@ -103,10 +117,10 @@ pdo_query("SET sort_buffer_size = 1024*1024"); // Out of sort memory, consider
$sql = "SELECT `problem_id`,`title`,`source`,`submit`,`accepted`,defunct FROM problem A WHERE $filter_sql $order_by $limit_sql ";
$count_sql = "SELECT count(1) from problem where $filter_sql ";
//echo htmlentities( $sql);
if (isset($_GET['search']) && trim($_GET['search']) != "") {
$total = pdo_query($count_sql, $search, $search);
if (count($filter_params) > 0) {
$total = pdo_query($count_sql, ...$filter_params);
$cnt = $total[0][0] / $page_cnt;
$result = pdo_query($sql, $search, $search);
$result = pdo_query($sql, ...$filter_params);
} else {
$total = mysql_query_cache($count_sql);
$cnt = $total[0][0] / $page_cnt;