math_cms/app/Filament/Resources/TextbookResource/Pages/ManageTextbookCovers.php

<?php

namespace App\Filament\Resources\TextbookResource\Pages;

use App\Filament\Resources\TextbookResource;
use App\Services\TextbookApiService;
use App\Services\TextbookCoverStorageService;
use Filament\Resources\Pages\Page;
use Livewire\Features\SupportFileUploads\TemporaryUploadedFile;
use Livewire\WithFileUploads;
use Throwable;

/**
 * 教材配图独立页：与「编辑教材」分离，支持多次选择多图追加、排序、删除后统一保存。
 */
class ManageTextbookCovers extends Page
{
    use WithFileUploads;

    protected static string $resource = TextbookResource::class;

    public ?int $recordId = null;

    public string $officialTitle = '';

    /** @var list<string> */
    public array $coverUrls = [];

    /** 本次待追加的本地文件（可多次选择、多次点「追加到列表」） */
    public array $photos = [];

    public ?string $saveFeedback = null;
    public string $saveFeedbackType = 'info';

    /**
     * 必须与路由参数名一致（{record}），Livewire 全页组件会把 URL 段注入 mount，勿仅用 Request::route（部分环境下为空）。
     */
    public function mount(int|string $record): void
    {
        $this->recordId = (int) $record;

        if ($this->recordId <= 0) {
            abort(404);
        }

        $data = app(TextbookApiService::class)->getTextbook($this->recordId);

        if (! $data) {
            abort(404);
        }

        $this->officialTitle = (string) ($data['official_title'] ?? '');
        $this->coverUrls = $this->splitCoverPath($data['cover_path'] ?? null);
    }

    /**
     * @return list<string>
     */
    protected function splitCoverPath(?string $path): array
    {
        if ($path === null || $path === '') {
            return [];
        }

        return array_values(array_unique(array_filter(array_map('trim', explode(',', $path)))));
    }

    public function appendPhotos(): void
    {
        if ($this->photos === []) {
            \Filament\Notifications\Notification::make()
                ->title('请先选择图片')
                ->warning()
                ->send();

            return;
        }

        $this->validate([
            'photos' => 'array',
            'photos.*' => 'image|max:5120',
        ]);

        $storage = app(TextbookCoverStorageService::class);
        $added = 0;
        foreach ($this->photos as $file) {
            if (! $file instanceof TemporaryUploadedFile) {
                continue;
            }
            $url = $storage->uploadCover($file, (string) $this->recordId);
            if ($url !== null && $url !== '') {
                $this->coverUrls[] = $url;
                $added++;
            }
        }

        $this->photos = [];

        $n = \Filament\Notifications\Notification::make()
            ->title($added > 0 ? "已追加 {$added} 张" : '未能上传')
            ->body($added > 0 ? '确认顺序后，点击页面底部「保存到服务器」写入教材。' : '请检查图片格式或存储配置。');

        if ($added > 0) {
            $n->success();
        } else {
            $n->warning();
        }

        $n->send();
    }

    public function removeAt(int $index): void
    {
        if (! isset($this->coverUrls[$index])) {
            return;
        }
        unset($this->coverUrls[$index]);
        $this->coverUrls = array_values($this->coverUrls);
    }

    public function moveUp(int $index): void
    {
        if ($index < 1 || ! isset($this->coverUrls[$index])) {
            return;
        }
        $tmp = $this->coverUrls[$index - 1];
        $this->coverUrls[$index - 1] = $this->coverUrls[$index];
        $this->coverUrls[$index] = $tmp;
    }

    public function moveDown(int $index): void
    {
        $n = count($this->coverUrls);
        if ($index >= $n - 1 || ! isset($this->coverUrls[$index])) {
            return;
        }
        $tmp = $this->coverUrls[$index + 1];
        $this->coverUrls[$index + 1] = $this->coverUrls[$index];
        $this->coverUrls[$index] = $tmp;
    }

    public function saveCovers(): void
    {
        if ($this->coverUrls === []) {
            $this->saveFeedback = '当前没有可保存的配图，请先上传并加入列表。';
            $this->saveFeedbackType = 'warning';

            \Filament\Notifications\Notification::make()
                ->title('暂无可保存图片')
                ->warning()
                ->send();

            return;
        }

        \Log::info('ManageTextbookCovers::saveCovers start', [
            'record_id' => $this->recordId,
            'count' => count($this->coverUrls),
        ]);

        $csv = $this->coverUrls === [] ? null : implode(',', $this->coverUrls);

        try {
            $response = app(TextbookApiService::class)->updateTextbook($this->recordId, [
                'cover_path' => $csv,
            ]);
        } catch (Throwable $e) {
            \Log::error('ManageTextbookCovers::saveCovers failed', [
                'record_id' => $this->recordId,
                'error' => $e->getMessage(),
            ]);

            $this->saveFeedback = '保存失败：' . $e->getMessage();
            $this->saveFeedbackType = 'error';

            \Filament\Notifications\Notification::make()
                ->title('保存失败')
                ->body($e->getMessage())
                ->danger()
                ->send();

            return;
        }

        $row = $response['data'] ?? $response;
        if (is_array($row) && isset($row['cover_path']) && is_string($row['cover_path'])) {
            $this->coverUrls = $this->splitCoverPath($row['cover_path']);
        }

        \Log::info('ManageTextbookCovers::saveCovers success', [
            'record_id' => $this->recordId,
            'saved_count' => count($this->coverUrls),
        ]);

        $this->saveFeedback = '保存成功（' . now()->format('H:i:s') . '）';
        $this->saveFeedbackType = 'success';

        \Filament\Notifications\Notification::make()
            ->title('配图已保存')
            ->success()
            ->send();
    }

    public function getTitle(): string
    {
        return '教材配图';
    }

    public function getView(): string
    {
        return 'filament.resources.textbook-resource.manage-covers';
    }
}