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October/Winter CMS创建组件component

后端开发October/Winter CMS 173

OctoberCMS有个非常重要的概念就是Component（组件），和ReactJS、VueJS等前端框架中的Componet概念一样，Component的出现让开发变得模块化，更简单且易维护，前面介绍过用创建Widget，今天来创建一个可设置数据调用数量及排序方式的Componet。

先看效果图

文件目录结构

Component的存放目录位于对应插件下的components目录，components需要分别需要一个业务逻辑处理的php文件和一个数据展现的htm文件，后者同样使用twig模板语法

October/Winter CMS创建组件component

注册Component

打开插件目录下的Plugin.php文件（本文示例目录: /Plugins/Julian/Library/Plugin.php）,找到registerComponents(),添加

        return [
            'Julian\Library\Components\Awards' => 'awards'
        ];

业务逻辑 awards.php

创建文件 /Plugins/Julian/Library/Components/Awards.php

<?php namespace Julian\Library\Components;
use Cms\Classes\ComponentBase;
use Julian\Library\Models\Award;

class Awards extends ComponentBase{

    public function componentDetails(){
        return [
            'name' => 'Award list',
            'description' => 'List of awards'
        ];
    }

    //自定义组件配置项
    public function defineProperties(){
        return [
            'results' => [
                'title' => 'Number of Awards',
                'description' => 'How many awards do you want to display?',
                'default' => 0,
                'validationPattern' => '^[0-9]+$',
                'validationMessage' => 'Only numbers allowed'
            ],
            'sortOrder' => [
                'title' => 'Sort Awards',
                'description' => 'Sort those awards',
                'type' => 'dropdown',
                'default' => 'award_title asc'
            ]
        ];
    }

    //设置排序方式
    public function getSortOrderOptions(){
        return [
            'award_title asc' => 'Name (Ascending)',
            'award_title desc' => 'Name (Descending)'
        ];
    }

    public function onRun(){
        $this->awards = $this->loadAwards();
    }

    //数据处理
    protected function loadAwards(){
        $query  = Award::all();

        if($this->property('sortOrder') == 'award_title asc'){
            $query = $query->sortBy('award_title');
        }

        if($this->property('sortOrder') == 'award_title desc'){
            $query = $query->sortByDesc('award_title');
        }        

        if($this->property('results') > 0){
            $query = Award::all()->take($this->property('results'));
        }
        return $query;
    }

    public $awards;
}
?>

数据展示 default.htm

创建文件 /Plugins/Julian/Library/Components/Awards/default.htm

{% set awards = __SELF__.awards %}
<ul>
    {% for award in awards %}
        <li>{{ award.award_title }}</li>
    {% endfor %}
</ul>

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