chatroom/app/Http/Requests/SendMessageRequest.php

<?php

/**
 * 文件功能：聊天室发言请求验证器
 *
 * @author   ChatRoom Laravel
 *
 * @version  1.0.0
 */

namespace App\Http\Requests;

use Illuminate\Contracts\Validation\Validator;
use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Http\Exceptions\HttpResponseException;

class SendMessageRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     */
    public function authorize(): bool
    {
        return true; // 权限验证已交由中间件处理
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array<string, \Illuminate\Contracts\Validation\ValidationRule|array<mixed>|string>
     */
    public function rules(): array
    {
        return [
            'content' => ['required', 'string', 'max:500'], // 防止超长文本炸服
            'to_user' => ['nullable', 'string', 'max:50'],
            'is_secret' => ['nullable', 'boolean'],
            'font_color' => ['nullable', 'string', 'max:10'],   // html color hex
            'action' => ['nullable', 'string', 'max:50'],   // 动作（例如：微笑着说）
        ];
    }

    public function messages(): array
    {
        return [
            'content.required' => '不能发送空消息。',
            'content.max' => '发言内容不能超过 500 个字符。',
        ];
    }

    /**
     * 重写验证失败的处理，无论如何（就算未按 ajax 标准提交）都必须抛出 JSON，不可以触发网页重定向去走 GET 请求而引发 302 方法错误
     */
    protected function failedValidation(Validator $validator)
    {
        throw new HttpResponseException(response()->json([
            'status' => 'error',
            'message' => $validator->errors()->first(),
            'errors' => $validator->errors(),
        ], 422));
    }
}