🚧 Auto discover extensions.

[mingyoung]

满足以下条件的 composer 包即可自动注入 observer，EasyWeChat 无需另外配置

相关包: easywechat-composer/easywechat-composer
示例包：open-platform-testcase

---

composer.json 内容：

type 需指定为 easywechat-extension

{
    "name": "foo/bar",
    "type": "easywechat-extension",
    "autoload": {
        "psr-4": {
            "Acme\\": ""
        }
    },
    "extra": {
        "observers": [
            "Acme\\ExampleHandler",
            "Acme\\OtherHandler"
        ]
    }
}

一个完整的 ExampleHandler 如下：

<?php

namespace Acme;

use EasyWeChat\Kernel\Contracts\EventHandlerInterface;
use EasyWeChat\OfficialAccount\Application as OfficialAccount;
use EasyWeChat\MiniProgram\Application as MiniProgram;
use EasyWeChat\Kernel\Messages\Message;

class ExampleHandler implements EventHandlerInterface
{
    public function handle(array $payload = [])
    {
        return 'hello world!';
    }

    // 指定注入的应用（可选）
    public static function getAccessor()
    {
        return OfficialAccount::class;
        // 或多个应用
        // return [OfficialAccount::class, MiniProgram::class,];
    }

    // 注入条件（可选）
    public static function onCondition()
    {
        return Message::IMAGE;
        // or 
        // return Message::IMAGE | Message::LOCATION;
    }
}

禁用某个 observer

EasyWeChat::officialAccount(
    // 配置加入以下内容：
    'disable_observers' => [
        '*', // 传入 * 则禁用所有
        'Acme\\ExampleHandler',
    ],
);