377 lines
12 KiB
PHP
Executable File
377 lines
12 KiB
PHP
Executable File
<?php
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namespace App\Controllers\Admin;
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use App\Core\AdminBaseController;
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use Db\Database; // Medoo数据库实例
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use \Exception;
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class ImagesController extends AdminBaseController {
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protected $db;
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protected $uploadDir;
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protected array $uploadConfig;
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// 允许的图片MIME类型
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const ALLOWED_MIME = [
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'image/jpeg', 'image/png', 'image/gif',
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'image/webp', 'image/svg+xml'
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];
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const MAX_UPLOAD_SIZE = 10485760; // 上传大小限制（10MB）
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const MAX_IMAGE_SIZE = 800; // 主图最大边长（等同缩略图大小）
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public function __construct() {
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$this->checkLogin(); // 登录验证
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$this->db = new Database(); // 初始化数据库连接
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$domain = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http")
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. "://" . $_SERVER['HTTP_HOST'];
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$this->uploadConfig = [
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'upload_dir' => $_SERVER['DOCUMENT_ROOT'] . '/Storage/images/',
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'url' => $domain . '/Storage/images/',
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'max_size' => 10 * 1024 * 1024, // 10MB
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'allowed_mimes' => [
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'image/jpeg', 'image/png', 'image/gif', 'image/webp', 'image/icon'
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],
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'min_quality' => 60,
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'max_quality' => 100,
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'default_quality' => 80
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];
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}
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/**
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* 图片管理首页（仅渲染前端页面，数据使用AJAX加载）
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*/
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public function index() {
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// 渲染页面模板
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$this->render('Admin/images.php', [
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'title' => '图片管理'
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]);
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}
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/**
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* 图片列表查询
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*/
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public function list() {
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try {
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// 处理分页参数
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$page = isset($_GET['page']) ? max(1, (int)$_GET['page']) : 1;
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$limit = isset($_GET['limit']) ?
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min(100, max(1, (int)$_GET['limit'])) : 20;
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$offset = ($page - 1) * $limit;
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// 查询总数
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$total = $this->db->count('images');
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// 查询当前页数据
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$data = $this->db->select('images', [
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'id', 'name', 'url',
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'size', 'width', 'height', 'upload_time'
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], [
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'LIMIT' => [$offset, $limit],
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'ORDER' => ['upload_time' => 'DESC']
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]);
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// 返回结果
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echo json_encode([
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'status' => 'success',
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'page' => $page,
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'total' => $total,
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'data' => $data ?: []
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]);
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exit;
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} catch (Exception $e) {
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$this->jsonError('获取数据失败: ' . $e->getMessage());
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}
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}
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/**
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* 图片上传处理
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*/
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public function upload() {
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if (!isset($_FILES['image']) || $_FILES['image']['error'] !== UPLOAD_ERR_OK) {
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$this->jsonError('文件上传失败: ' . $this->getUploadError($_FILES['image']['error'] ?? -1));
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}
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$file = $_FILES['image'];
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$params = [
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'quality' => isset($_POST['quality']) ?
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min($this->uploadConfig['max_quality'],
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max($this->uploadConfig['min_quality'], (int)$_POST['quality'])) :
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$this->uploadConfig['default_quality'],
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'width' => isset($_POST['width']) && $_POST['width'] !== '' ? max(1, (int)$_POST['width']) : 0,
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'height' => isset($_POST['height']) && $_POST['height'] !== '' ? max(1, (int)$_POST['height']) : 0
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];
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if ($file['size'] > $this->uploadConfig['max_size']) {
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$this->jsonError("文件过大，最大支持" . $this->formatFileSize($this->uploadConfig['max_size']));
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}
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$finfo = new \finfo(FILEINFO_MIME_TYPE);
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$mime = $finfo->file($file['tmp_name']);
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if (!in_array($mime, $this->uploadConfig['allowed_mimes'])) {
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$this->jsonError('不支持的文件类型，仅允许: ' . implode(', ', $this->uploadConfig['allowed_mimes']));
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}
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try {
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$uploadDir = rtrim($this->uploadConfig['upload_dir'], '/') . '/';
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if (!is_dir($uploadDir)) {
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mkdir($uploadDir, 0755, true);
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}
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$originalName = basename($file['name']);
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$originalExt = pathinfo($originalName, PATHINFO_EXTENSION);
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$filename = date('YmdHis') . '_' . uniqid() . '.' . $originalExt;
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$targetPath = $uploadDir . $filename;
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list($origWidth, $origHeight) = getimagesize($file['tmp_name']);
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list($newWidth, $newHeight, $srcX, $srcY, $cropW, $cropH) = $this->calculateDimensions(
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$origWidth, $origHeight,
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$params['width'], $params['height']
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);
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// 判断是否需要裁剪
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if ($params['width'] > 0 && $params['height'] > 0) {
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$success = $this->processImageWithCrop(
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$file['tmp_name'], $mime, $targetPath,
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$newWidth, $newHeight,
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$srcX, $srcY, $cropW, $cropH,
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$params['quality']
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);
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} else {
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$success = $this->processImage(
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$file['tmp_name'], $mime, $targetPath,
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$newWidth, $newHeight, $params['quality']
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);
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}
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if (!$success) {
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throw new Exception('图片处理失败');
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}
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$record = [
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'name' => $originalName,
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'newname' => $filename,
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'url' => rtrim($this->uploadConfig['url'], '/') . '/' . $filename,
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'size' => filesize($targetPath),
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'width' => $newWidth,
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'height' => $newHeight,
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'upload_time' => time()
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];
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$imageId = $this->db->insert('images', $record);
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echo json_encode([
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'status' => 'success',
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'data' => $record + ['id' => $imageId]
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]);
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exit;
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} catch (Exception $e) {
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if (isset($targetPath) && file_exists($targetPath)) {
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unlink($targetPath);
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}
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$this->jsonError($e->getMessage());
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}
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}
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private function calculateDimensions($origW, $origH, $targetW, $targetH) {
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if ($targetW <= 0 && $targetH <= 0) {
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return [$origW, $origH, 0, 0, $origW, $origH];
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}
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// 只指定宽
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if ($targetW > 0 && $targetH <= 0) {
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$newW = $targetW;
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$newH = (int)($origH * ($targetW / $origW));
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return [$newW, $newH, 0, 0, $origW, $origH];
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}
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// 只指定高
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if ($targetH > 0 && $targetW <= 0) {
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$newH = $targetH;
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$newW = (int)($origW * ($targetH / $origH));
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return [$newW, $newH, 0, 0, $origW, $origH];
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}
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// 指定宽高 → 居中裁剪
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$srcRatio = $origW / $origH;
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$dstRatio = $targetW / $targetH;
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if ($srcRatio > $dstRatio) {
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$cropH = $origH;
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$cropW = (int)($origH * $dstRatio);
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$srcX = (int)(($origW - $cropW) / 2);
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$srcY = 0;
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} else {
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$cropW = $origW;
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$cropH = (int)($origW / $dstRatio);
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$srcX = 0;
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$srcY = (int)(($origH - $cropH) / 2);
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}
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return [$targetW, $targetH, $srcX, $srcY, $cropW, $cropH];
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}
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// 处理图片，带裁剪逻辑
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private function processImageWithCrop($srcPath, $mime, $destPath, $width, $height, $srcX, $srcY, $cropW, $cropH, $quality) {
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switch ($mime) {
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case 'image/jpeg': $src = imagecreatefromjpeg($srcPath); break;
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case 'image/png': $src = imagecreatefrompng($srcPath); imagesavealpha($src, true); break;
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case 'image/gif': $src = imagecreatefromgif($srcPath); break;
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case 'image/webp': $src = imagecreatefromwebp($srcPath); break;
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default: throw new Exception("不支持的图片格式: {$mime}");
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}
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if (!$src) throw new Exception('无法解析图片内容');
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$dest = imagecreatetruecolor($width, $height);
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if ($mime === 'image/png' || $mime === 'image/gif') {
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imagealphablending($dest, false);
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imagesavealpha($dest, true);
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$transparent = imagecolorallocatealpha($dest, 255, 255, 255, 127);
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imagefilledrectangle($dest, 0, 0, $width, $height, $transparent);
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}
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imagecopyresampled(
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$dest, $src,
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0, 0,
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$srcX, $srcY,
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$width, $height,
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$cropW, $cropH
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);
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$result = false;
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switch ($mime) {
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case 'image/jpeg': $result = imagejpeg($dest, $destPath, $quality); break;
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case 'image/png': $result = imagepng($dest, $destPath); break;
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case 'image/gif': $result = imagegif($dest, $destPath); break;
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case 'image/webp': $result = imagewebp($dest, $destPath, $quality); break;
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}
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imagedestroy($src);
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imagedestroy($dest);
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return $result;
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}
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// 工具函数：图片处理（普通格式，不裁剪）
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private function processImage($srcPath, $mime, $destPath, $width, $height, $quality) {
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switch ($mime) {
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case 'image/jpeg': $src = imagecreatefromjpeg($srcPath); break;
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case 'image/png': $src = imagecreatefrompng($srcPath); imagesavealpha($src, true); break;
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case 'image/gif': $src = imagecreatefromgif($srcPath); break;
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case 'image/webp': $src = imagecreatefromwebp($srcPath); break;
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default: throw new Exception("不支持的图片格式: {$mime}");
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}
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if (!$src) throw new Exception('无法解析图片内容');
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$dest = imagecreatetruecolor($width, $height);
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if ($mime === 'image/png' || $mime === 'image/gif') {
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imagealphablending($dest, false);
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imagesavealpha($dest, true);
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$transparent = imagecolorallocatealpha($dest, 255, 255, 255, 127);
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imagefilledrectangle($dest, 0, 0, $width, $height, $transparent);
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}
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imagecopyresampled($dest, $src, 0, 0, 0, 0, $width, $height, imagesx($src), imagesy($src));
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$result = false;
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switch ($mime) {
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case 'image/jpeg': $result = imagejpeg($dest, $destPath, $quality); break;
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case 'image/png': $result = imagepng($dest, $destPath); break;
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case 'image/gif': $result = imagegif($dest, $destPath); break;
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case 'image/webp': $result = imagewebp($dest, $destPath, $quality); break;
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}
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imagedestroy($src);
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imagedestroy($dest);
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return $result;
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}
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// 工具函数：上传错误信息
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private function getUploadError($code) {
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$errors = [
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UPLOAD_ERR_INI_SIZE => '超过php.ini限制',
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UPLOAD_ERR_FORM_SIZE => '超过表单限制',
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UPLOAD_ERR_PARTIAL => '文件仅部分上传',
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UPLOAD_ERR_NO_FILE => '未上传文件',
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UPLOAD_ERR_NO_TMP_DIR => '缺少临时目录',
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UPLOAD_ERR_CANT_WRITE => '写入文件失败',
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UPLOAD_ERR_EXTENSION => '被扩展阻止'
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];
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return $errors[$code] ?? "未知错误（代码: {$code}）";
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}
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// 工具函数：格式化文件大小
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private function formatFileSize($bytes) {
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if ($bytes < 1024) return $bytes . 'B';
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if ($bytes < 1048576) return round($bytes / 1024, 1) . 'KB';
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return round($bytes / 1048576, 1) . 'MB';
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}
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// 工具函数：JSON错误响应
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private function jsonError($message) {
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echo json_encode([
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'status' => 'error',
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'message' => $message
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]);
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exit;
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}
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public function delete() {
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header('Content-Type: application/json');
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// 获取 JSON 输入
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$input = json_decode(file_get_contents('php://input'), true);
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if (!isset($input['ids']) || !is_array($input['ids'])) {
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echo json_encode(['status' => 'error', 'message' => '缺少参数']);
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return;
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}
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// 将字符串数组转换为整数数组
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$ids = array_map('intval', $input['ids']);
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$ids = array_filter($ids); // 去除无效值
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if (empty($ids)) {
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echo json_encode(['status' => 'error', 'message' => '无效的 ID 列表']);
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return;
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}
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try {
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// 查询图片路径（如果你想同时删除图片文件）
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$images = $this->db->select('images', ['id', 'newname'], [
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'id' => $ids
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]);
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foreach ($images as $img) {
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$file = $this->uploadConfig['upload_dir'] . $img['newname'];
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if (file_exists($file)) {
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@unlink($file);
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}
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}
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// 删除数据库记录
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$this->db->delete('images', ['id' => $ids]);
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echo json_encode(['status' => 'success']);
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} catch (Exception $e) {
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echo json_encode(['status' => 'error', 'message' => '删除失败：' . $e->getMessage()]);
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}
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}
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}
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