Initial commit: 교육 프로젝트 배포
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송대일
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<?php
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declare(strict_types=1);
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header('Content-Type: application/json; charset=utf-8');
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if (session_status() === PHP_SESSION_NONE) {
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session_start();
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}
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require_once __DIR__ . '/../db_conn.php';
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$memberId = (string)($_SESSION['member_id'] ?? '');
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$sysCompCode = (string)($_SESSION['sys_comp_code'] ?? '');
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if ($memberId === '') {
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http_response_code(401);
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echo json_encode(['success' => false, 'message' => 'not_logged_in'], JSON_UNESCAPED_UNICODE);
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exit;
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}
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$contentId = trim((string)($_GET['content_id'] ?? ''));
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if ($contentId === '') {
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http_response_code(400);
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echo json_encode(['success' => false, 'message' => 'content_id_required'], JSON_UNESCAPED_UNICODE);
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exit;
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}
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try {
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$pdo = db_conn();
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$normCode = static function (string $code): string {
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return preg_replace('/[^A-Z0-9]/', '', strtoupper(trim($code)));
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};
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$looksLikeCode = static function (string $value): bool {
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return preg_match('/^[A-Z]{2}[A-Z0-9]{3,}$/', strtoupper(trim($value))) === 1;
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};
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$codeMap = [];
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try {
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$stmtCodeMap = $pdo->query("SELECT base_code, code_name FROM edu_codes");
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foreach ($stmtCodeMap->fetchAll(PDO::FETCH_ASSOC) as $cr) {
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$key = $normCode((string)($cr['base_code'] ?? ''));
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if ($key === '') continue;
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$codeMap[$key] = (string)($cr['code_name'] ?? '');
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}
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} catch (Throwable $ignore) {
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$codeMap = [];
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}
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// 1) 현재 영상의 키워드 코드 조회
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$keywordCodes = [];
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try {
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$stmtKw = $pdo->prepare('SELECT keyword_code FROM edu_content_keywords WHERE content_id = ?');
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$stmtKw->execute([$contentId]);
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$keywordCodes = $stmtKw->fetchAll(PDO::FETCH_COLUMN) ?: [];
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} catch (Throwable $kwErr) {
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// edu_content_keywords 테이블이 없는 경우 무시 → fallback
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$keywordCodes = [];
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}
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// 키워드 없으면 같은 카테고리 영상으로 fallback
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if (empty($keywordCodes)) {
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// 현재 영상의 카테고리 조회
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$stmtCat = $pdo->prepare('SELECT category_code FROM edu_contents WHERE content_id = ? LIMIT 1');
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$stmtCat->execute([$contentId]);
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$curCatCode = $stmtCat->fetchColumn();
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if (!$curCatCode) {
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echo json_encode([
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'success' => true,
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'keywords' => [],
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'videos' => [],
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], JSON_UNESCAPED_UNICODE);
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exit;
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}
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$stmtFallback = $pdo->prepare(
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"SELECT c.content_id, c.title, c.content_url, c.thumbnail_url,
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c.category_code, c.category_group, c.description,
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COALESCE(ec.code_name, c.category_code) AS category_name,
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COALESCE(ec_grp.code_name, c.category_group) AS category_group_name
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FROM edu_contents c
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LEFT JOIN edu_codes ec ON TRIM(UPPER(ec.base_code)) = TRIM(UPPER(c.category_code))
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LEFT JOIN edu_codes ec_grp ON TRIM(UPPER(ec_grp.base_code)) = TRIM(UPPER(c.category_group))
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WHERE c.category_code = ?
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AND c.content_id != ?
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AND c.is_active = 1
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ORDER BY c.start_date DESC
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LIMIT 8"
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);
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$stmtFallback->execute([$curCatCode, $contentId]);
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$rows = $stmtFallback->fetchAll(PDO::FETCH_ASSOC) ?: [];
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$videos = [];
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foreach ($rows as $row) {
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$raw = trim($row['content_url'] ?? '');
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$videoId = '';
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if (preg_match('/(?:v=|youtu\.be\/)([A-Za-z0-9_-]{11})/', $raw, $m)) {
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$videoId = $m[1];
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} elseif (preg_match('/^[A-Za-z0-9_-]{11}$/', $raw)) {
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$videoId = $raw;
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}
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$thumbFromDb = trim($row['thumbnail_url'] ?? '');
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$thumbnail = $thumbFromDb !== ''
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? $thumbFromDb
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: ($videoId !== '' ? "https://img.youtube.com/vi/{$videoId}/sddefault.jpg" : '');
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$catCode = $row['category_code'] ?? '';
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$subcate = trim((string)($row['category_group_name'] ?? $row['category_group'] ?? ''));
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$catName = trim((string)($row['category_name'] ?? $catCode));
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if (($catName === '' || $looksLikeCode($catName)) && $catCode !== '') {
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$mapped = $codeMap[$normCode($catCode)] ?? '';
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if ($mapped !== '') $catName = $mapped;
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}
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$groupRaw = trim((string)($row['category_group'] ?? ''));
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if (($subcate === '' || $looksLikeCode($subcate)) && $groupRaw !== '') {
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$mapped = $codeMap[$normCode($groupRaw)] ?? '';
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if ($mapped !== '') $subcate = $mapped;
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}
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$videos[] = [
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'content_id' => $row['content_id'],
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'title' => $row['title'] ?? '',
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'content_url' => $videoId !== '' ? "https://www.youtube.com/watch?v={$videoId}" : $raw,
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'thumbnail' => $thumbnail,
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'category_code' => $catCode,
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'category' => $catName,
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'category_name' => $catName,
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'subcate' => $subcate,
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'description' => $row['description'] ?? '',
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];
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}
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echo json_encode([
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'success' => true,
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'keywords' => [],
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'videos' => $videos,
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], JSON_UNESCAPED_UNICODE);
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exit;
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}
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// 2) 키워드명 조회 (표시용)
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$kwPlaceholders = implode(',', array_fill(0, count($keywordCodes), '?'));
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$keywordNames = [];
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try {
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$stmtKwNames = $pdo->prepare(
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"SELECT keyword_code, keyword_name FROM edu_keywords WHERE keyword_code IN ({$kwPlaceholders})"
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);
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$stmtKwNames->execute($keywordCodes);
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while ($row = $stmtKwNames->fetch(PDO::FETCH_ASSOC)) {
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$keywordNames[] = $row['keyword_name'];
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}
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} catch (Throwable $kwNameErr) {
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$keywordNames = [];
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}
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// 3) 동일 키워드를 가진 다른 영상 조회 (현재 영상 제외, 랜덤 8개)
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$rows = [];
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try {
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$stmtVideos = $pdo->prepare(
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"SELECT DISTINCT
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c.content_id,
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c.title,
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c.content_url,
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c.thumbnail_url,
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c.category_code,
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c.category_group,
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c.description,
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COALESCE(ec.code_name, c.category_code) AS category_name,
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COALESCE(ec_grp.code_name, c.category_group) AS category_group_name
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FROM edu_contents c
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LEFT JOIN edu_codes ec ON TRIM(UPPER(ec.base_code)) = TRIM(UPPER(c.category_code))
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LEFT JOIN edu_codes ec_grp ON TRIM(UPPER(ec_grp.base_code)) = TRIM(UPPER(c.category_group))
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INNER JOIN edu_content_keywords ck ON ck.content_id = c.content_id
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WHERE ck.keyword_code IN ({$kwPlaceholders})
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AND c.content_id != ?
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AND c.is_active = 1
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ORDER BY RAND()
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LIMIT 8"
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);
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$params = array_merge($keywordCodes, [$contentId]);
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$stmtVideos->execute($params);
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$rows = $stmtVideos->fetchAll(PDO::FETCH_ASSOC) ?: [];
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} catch (Throwable $kwVideoErr) {
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$rows = [];
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}
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// 키워드 매칭 결과 없으면 같은 카테고리 fallback
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if (empty($rows)) {
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$stmtCat = $pdo->prepare('SELECT category_code FROM edu_contents WHERE content_id = ? LIMIT 1');
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$stmtCat->execute([$contentId]);
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$curCatCode = $stmtCat->fetchColumn();
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if ($curCatCode) {
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$stmtFb = $pdo->prepare(
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"SELECT c.content_id, c.title, c.content_url, c.thumbnail_url,
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c.category_code, c.category_group, c.description,
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COALESCE(ec.code_name, c.category_code) AS category_name,
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COALESCE(ec_grp.code_name, c.category_group) AS category_group_name
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FROM edu_contents c
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LEFT JOIN edu_codes ec ON TRIM(UPPER(ec.base_code)) = TRIM(UPPER(c.category_code))
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LEFT JOIN edu_codes ec_grp ON TRIM(UPPER(ec_grp.base_code)) = TRIM(UPPER(c.category_group))
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WHERE c.category_code = ?
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AND c.content_id != ?
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AND c.is_active = 1
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ORDER BY c.start_date DESC
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LIMIT 8"
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);
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$stmtFb->execute([$curCatCode, $contentId]);
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$rows = $stmtFb->fetchAll(PDO::FETCH_ASSOC) ?: [];
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}
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}
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$videos = [];
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foreach ($rows as $row) {
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$raw = trim($row['content_url'] ?? '');
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$videoId = '';
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if (preg_match('/(?:v=|youtu\.be\/)([A-Za-z0-9_-]{11})/', $raw, $m)) {
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$videoId = $m[1];
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} elseif (preg_match('/^[A-Za-z0-9_-]{11}$/', $raw)) {
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$videoId = $raw;
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}
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$thumbFromDb = trim($row['thumbnail_url'] ?? '');
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$thumbnail = $thumbFromDb !== ''
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? $thumbFromDb
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: ($videoId !== '' ? "https://img.youtube.com/vi/{$videoId}/sddefault.jpg" : '');
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$catCode = $row['category_code'] ?? '';
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$subcate = trim((string)($row['category_group_name'] ?? $row['category_group'] ?? ''));
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$catName = trim((string)($row['category_name'] ?? $catCode));
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if (($catName === '' || $looksLikeCode($catName)) && $catCode !== '') {
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$mapped = $codeMap[$normCode($catCode)] ?? '';
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if ($mapped !== '') $catName = $mapped;
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}
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$groupRaw = trim((string)($row['category_group'] ?? ''));
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if (($subcate === '' || $looksLikeCode($subcate)) && $groupRaw !== '') {
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$mapped = $codeMap[$normCode($groupRaw)] ?? '';
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if ($mapped !== '') $subcate = $mapped;
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}
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$videos[] = [
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'content_id' => $row['content_id'],
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'title' => $row['title'] ?? '',
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'content_url' => $videoId !== '' ? "https://www.youtube.com/watch?v={$videoId}" : $raw,
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'thumbnail' => $thumbnail,
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'category_code' => $catCode,
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'category' => $catName,
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'category_name' => $catName,
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'subcate' => $subcate,
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'description' => $row['description'] ?? '',
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];
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}
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echo json_encode([
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'success' => true,
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'keywords' => $keywordNames,
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'videos' => $videos,
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], JSON_UNESCAPED_UNICODE);
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} catch (Throwable $e) {
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error_log('[get_recommend_videos] ' . $e->getMessage());
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http_response_code(500);
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echo json_encode(['success' => false, 'message' => 'server_error'], JSON_UNESCAPED_UNICODE);
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}
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