如何验证控制台命令提示符输入

Question

在我提示输入的控制台命令之后。我想验证用户输入。我该怎么做？

我已经检查了this plugin。但它看起来像验证参数和选项。不是交互式输入。

CreateClient.php

namespace App\Console\Commands;

use Illuminate\Console\Command;

class CreateClient extends Command {
    ...

    public function handle() {
        $name   = $this->ask('Enter name ');
        $email  = $this->ask('Enter email ');
        $date   = $this->ask('Enter date [Eg: 2016-01-01 00:00:00] ');

        // Validate user input
        $this->info('Validating user inputs');

       // How to validate email & date format ?
    }
}

更新

是的，我知道Validator，但担心的是验证会停止用户旅程。用户从头开始重新启动。是否可以为每个问题附加验证，因此验证将立即并提示再次输入。

以下是我在不输入任何值时注意到的情况，我想知道如何提供更多的验证规则。

提前致谢。

Answer 1

下面是另一种使用 Laravel 的验证器的方法。

我的自定义方法validate_cmd 需要2个参数：

1. 作为匿名函数的Command 方法（询问、秘密、选择...）
2. 规则数组

如果验证失败，将再次调用Command 方法。

当然，你会想把它放在一个 Trait 中。

namespace App\Console\Commands;

use Illuminate\Console\Command;
use Validator;

class CreateClient extends Command {

    public function handle() {

        $name = $this->validate_cmd(function() {
            return $this->ask('Enter name');
        }, ['name','required']);

        $email = $this->validate_cmd(function() {
            return $this->ask('Enter email');
        }, ['email','required|email']);

        $date = $this->validate_cmd(function() {
            return $this->ask('Enter date [Eg: 2016-01-01 00:00:00]');
        }, ['date','required']);

    }

    /**
     * Validate an input.
     *
     * @param  mixed   $method
     * @param  array   $rules
     * @return string
     */
    public function validate_cmd($method, $rules)
    {
        $value = $method();
        $validate = $this->validateInput($rules, $value);

        if ($validate !== true) {
            $this->warn($validate);
            $value = $this->validate_cmd($method, $rules);
        }
        return $value;
    }

    public function validateInput($rules, $value)
    {

        $validator = Validator::make([$rules[0] => $value], [ $rules[0] => $rules[1] ]);

        if ($validator->fails()) {
            $error = $validator->errors();
            return $error->first($rules[0]);
        }else{
            return true;
        }

    }

}

Answer 2

一种方法是使用FILTER_VALIDATE_EMAIL 和Carbon

public function handle() {
    $name   = $this->ask('Enter name ');
    $email  = $this->ask('Enter email ');
    $date   = $this->ask('Enter date [Eg: 2016-01-01 00:00:00] ');

    // Validate user input
    $this->info('Validating user inputs');

    // How to validate email & date format ?
    $email_status = filter_var($email, FILTER_VALIDATE_EMAIL);

    if (!$email_status) {
        // Invalid EMAIL
    }

    if (\Carbon::createFromFormat('YOUR DATE FORMAT', $date) === false) {
        // Invalid date
    }

}

另一种方法是@btl 使用Validator 所说的

public function handle() {
    $name   = $this->ask('Enter name ');
    $email  = $this->ask('Enter email ');
    $date   = $this->ask('Enter date [Eg: 2016-01-01 00:00:00] ');

    // Validate user input
    $this->info('Validating user inputs');

    $data = array(
        'email' => $email,
        'date'  => $date
    );

    $rules = array(
        'email' => 'required|email',
        'date'  => 'required|date',
    );

    $validator = \Validator::make($data, $rules);

    if ($validator->fails()) {
        $messages = $validator->messages();
    }

}

Answer 3

创建一个验证器实例并设置相应的规则。

https://laravel.com/api/5.4/Illuminate/Contracts/Validation/Validator.html

具体见 make() 方法。

https://laravel.com/api/5.4/Illuminate/Contracts/Validation/Factory.html

public function handle()
{
    $name = $this->ask('Enter name ');
    $validator = \Validator::make(['name' => $name], ['name' => 'required|string']);
    if ($validator->fails()) {
        $message = $validator->messages();
    }
    $email = $this->ask('Enter email ');
    $validator = \Validator::make(['email' => $email], ['email' => 'required|email']);
    if ($validator->fails()) {
        $message = $validator->messages();
    }
    $date = $this->ask('Enter date [Eg: 2016-01-01 00:00:00] ');
    $validator = \Validator::make(['date' => $date], ['date' => 'required|datetime']);
    if ($validator->fails()) {
        $message = $validator->messages();
    }

    // so something with $message
}

Answer 4

我就是这样解决的。

由于\Symfony\Component\Console\Style\SymfonyStyle类支持将验证回调作为第三个参数传递，我编写了一个下面的函数并调用它。

/**
 * Prompt the user for input.
 *
 * @param  string $question
 * @param  string $default
 * @param  callable|null $validator
 * @return string
 */
public function askWithValidation($question, $default = null, $validator = null)
{
    return $this->output->ask($question, $default, $validator);
}

通用验证函数

use Validator;

/**
 * Validates the user input
 *
 * @param string $attribute
 * @param string $validation
 * @param string $value
 * @throws Exception
 * @return string
 */
protected function validateInput(string $attribute, string $validation, $value)
{
    if (! is_array($value) && ! is_bool($value) && 0 === strlen($value)) {
        throw new \Exception('A value is required.');
    }

    $validator = Validator::make([
        $attribute => $value
    ], [
        $attribute => $validation
    ]);

    if ($validator->fails()) {
        throw new \Exception($validator->errors()->first($attribute));
    }

    return $value;
}

致电：

$contactEmail = $this->askWithValidation('Enter contact email ', null, function ($value) {
    return $this->validateInput('contactEmail', 'email', $value);
});

Answer 5

这是Erevald 的略微修改版本，因为我也需要类似的功能。

public function validate_console($method, $rules)
{
    $value = $method();
    $validate = $this->validateInput($rules, $value);

    if ($validate !== true) {
        $messages = collect($validate->messages())->flatten()->all();
        foreach ($messages as $failure) {
            $this->warn($failure);
        }
        $value = $this->validate_console($method, $rules);
    }
    return $value;
}

public function validateInput($rules, $value)
{
    $validator = Validator::make([key($rules) => $value], $rules);
    if ($validator->fails()) {
        return $validator->errors();
    }else{
        return true;
    }
}

用法：

$client_name = $this->validate_console(function() {
        return $this->ask('What should I call you? (Client Name)');
    }, ['client_name' => 'email|min:4']);

输出：

The client name must be a valid email address.
The client name must be at least 4 characters.