<?php
// +----------------------------------------------------------------------
// | Yzncms [ 御宅男工作室 ]
// +----------------------------------------------------------------------
// | Copyright (c) 2018 http://yzncms.com All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: 御宅男 <530765310@qq.com>
// +----------------------------------------------------------------------

// +----------------------------------------------------------------------
// | 字段模型
// +----------------------------------------------------------------------
namespace app\cms\model;

use app\common\model\Modelbase;
use think\Db;

/**
 * 字段模型
 */
class ModelField extends Modelbase
{
    protected $autoWriteTimestamp = true;
    protected $insert             = ['status' => 1];
    protected $ext_table          = '_data';

    //添加字段
    public function addField($data = null)
    {
        $data['name']     = strtolower($data['name']);
        $data['ifsystem'] = isset($data['ifsystem']) ? intval($data['ifsystem']) : 0;
        //模型id
        $modelid = $data['modelid'];
        //完整表名获取 判断主表 还是副表
        $tablename = $this->getModelTableName($modelid, $data['ifsystem']);
        if (!$this->table_exists($tablename)) {
            throw new \Exception('数据表不存在！');
        }
        $tablename = config('database.prefix') . $tablename;
        //判断字段名唯一性
        if ($this->where('name', $data['name'])->where('modelid', $modelid)->value('id')) {
            throw new \Exception("字段'" . $data['name'] . "`已经存在");
        }

        $data['isadd']     = isset($data['isadd']) ? intval($data['isadd']) : 0;
        $data['ifrequire'] = isset($data['ifrequire']) ? intval($data['ifrequire']) : 0;
        if ($data['ifrequire'] && !$data['isadd']) {
            throw new \Exception('必填字段不可以隐藏！');
        }

        if ($data['setting']['value'] === '') {
            $default = '';
        } elseif (strstr(strtolower($data['setting']['define']), 'text') || strstr(strtolower($data['setting']['define']), 'blob')) {
            $default = '';
        } else {
            $default = " DEFAULT '{$data['setting']['value']}'";
        }

        //先将字段存在设置的主表或附表里面 再将数据存入ModelField
        $sql = <<<EOF
            ALTER TABLE `{$tablename}`
            ADD COLUMN `{$data['name']}` {$data['setting']['define']} {$default} COMMENT '{$data['title']}';
EOF;
        Db::execute($sql);
        $fieldInfo = Db::name('field_type')->where('name', $data['type'])->field('ifoption,ifstring')->find();
        //只有主表文本类字段才可支持搜索
        $data['ifsearch']           = isset($data['ifsearch']) ? ($fieldInfo['ifstring'] && $data['ifsystem'] ? intval($data['ifsearch']) : 0) : 0;
        $data['status']             = isset($data['status']) ? intval($data['status']) : 0;
        $data['iffixed']            = 0;
        $data['setting']['options'] = $fieldInfo['ifoption'] ? $data['setting']['options'] : '';
        //附加属性值
        $data['setting'] = serialize($data['setting']);
        $fieldid         = self::create($data, true);
        if ($fieldid) {
            //清理缓存
            cache('ModelField', null);
            return true;
        } else {
            //回滚
            Db::execute("ALTER TABLE  `{$tablename}` DROP  `{$data['name']}`");
            throw new \Exception('字段信息入库失败！');

        }
        return true;
    }

    /**
     *  编辑字段
     * @param type $data 编辑字段数据
     * @param type $fieldid 字段id
     * @return boolean
     */
    public function editField($data, $fieldid = 0)
    {
        $data['name']     = strtolower($data['name']);
        $data['ifsystem'] = isset($data['ifsystem']) ? intval($data['ifsystem']) : 0;
        if (!$fieldid && !isset($data['fieldid'])) {
            throw new \Exception('缺少字段id！');
        } else {
            $fieldid = $fieldid ? $fieldid : (int) $data['fieldid'];
        }
        //原字段信息
        $info = self::where(array("id" => $fieldid))->find();
        if (empty($info)) {
            throw new \Exception('该字段不存在！');
        }
        //模型id
        $data['modelid'] = $modelid = $info['modelid'];
        //完整表名获取 判断主表 还是副表
        $tablename = $this->getModelTableName($modelid, $data['ifsystem']);
        if (!$this->table_exists($tablename)) {
            throw new \Exception('数据表不存在！');
        }
        $tablename = config('database.prefix') . $tablename;
        //判断字段名唯一性
        if ($this->where('name', $data['name'])->where('modelid', $modelid)->where('id', '<>', $fieldid)->value('id')) {
            throw new \Exception("字段'" . $data['name'] . "`已经存在");
        }
        $data['isadd']     = isset($data['isadd']) ? intval($data['isadd']) : 0;
        $data['ifrequire'] = isset($data['ifrequire']) ? intval($data['ifrequire']) : 0;
        if ($data['ifrequire'] && !$data['isadd']) {
            throw new \Exception('必填字段不可以隐藏！');
        }

        if ($data['setting']['value'] === '') {
            $default = '';
        } elseif (strstr(strtolower($data['setting']['define']), 'text') || strstr(strtolower($data['setting']['define']), 'blob')) {
            $default = '';
        } else {
            $default = " DEFAULT '{$data['setting']['value']}'";
        }

        $sql = <<<EOF
            ALTER TABLE `{$tablename}`
            CHANGE COLUMN `{$info['name']}` `{$data['name']}` {$data['setting']['define']} {$default} COMMENT '{$data['title']}';
EOF;
        try {
            Db::execute($sql);
        } catch (\Exception $e) {
            $this->addField($data);
        }
        $fieldInfo = Db::name('field_type')->where('name', $data['type'])->field('ifoption,ifstring')->find();
        //只有主表文本类字段才可支持搜索
        $data['ifsearch'] = isset($data['ifsearch']) ? ($fieldInfo['ifstring'] && $data['ifsystem'] ? intval($data['ifsearch']) : 0) : 0;
        $data['status']   = isset($data['status']) ? intval($data['status']) : 0;
        //$data['options'] = $fieldInfo['ifoption'] ? $data['options'] : '';
        $data['setting']['options'] = $fieldInfo['ifoption'] ? $data['setting']['options'] : '';
        //附加属性值
        $data['setting'] = serialize($data['setting']);
        //清理缓存
        cache('ModelField', null);
        self::update($data, ['id' => $fieldid], true);
        return true;
    }

    /**
     * 删除字段
     * @param type $fieldid 字段id
     * @return boolean
     */
    public function deleteField($fieldid)
    {

        //原字段信息
        $info = self::where(array("id" => $fieldid))->find();
        if (empty($info)) {
            throw new \Exception('该字段不存在！');
        }
        //模型id
        $modelid = $info['modelid'];
        //完整表名获取 判断主表 还是副表
        $tablename = $this->getModelTableName($modelid, $info['ifsystem']);
        if (!$this->table_exists($tablename)) {
            throw new \Exception('数据表不存在！');
        }
        $tablename = config('database.prefix') . $tablename;
        //判断是否允许删除
        $sql = <<<EOF
            ALTER TABLE `{$tablename}`
            DROP COLUMN `{$info['name']}`;
EOF;
        Db::execute($sql);
        self::get($fieldid)->delete();
        return true;
    }

    /**
     * 根据模型ID，返回表名
     * @param type $modelid
     * @param type $modelid
     * @return string
     */
    protected function getModelTableName($modelid, $ifsystem = 1)
    {
        //读取模型配置 以后优化缓存形式
        $model_cache = cache("Model");
        //表名获取
        $model_table = $model_cache[$modelid]['tablename'];
        //完整表名获取 判断主表 还是副表
        $tablename = $ifsystem ? $model_table : $model_table . "_data";
        return $tablename;
    }

}