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306 lines
11 KiB
PHP
306 lines
11 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace traits\model;
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trait View
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{
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/**
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* 自动检测数据表信息
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* @access protected
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* @return void
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*/
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protected function _checkTableInfo()
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{}
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/**
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* 得到完整的数据表名
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* @access public
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* @return string
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*/
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public function getTableName()
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{
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if (empty($this->trueTableName)) {
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$tableName = '';
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$len = 0;
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foreach ($this->viewFields as $name => $view) {
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// 获取数据表名称
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if (isset($view['_table'])) {
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// 2011/10/17 添加实际表名定义支持 可以实现同一个表的视图
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$tableName .= $view['_table'];
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$prefix = $this->tablePrefix;
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$tableName = preg_replace_callback("/__([A-Z_-]+)__/sU", function ($match) use ($prefix) {return $prefix . strtolower($match[1]);}, $tableName);
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} else {
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$tableName .= \think\Loader::table($name)->getTableName();
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}
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// 表别名定义
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$tableName .= !empty($view['_as']) ? ' ' . $view['_as'] : ' ' . $name;
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// 支持ON 条件定义
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$tableName .= !empty($view['_on']) ? ' ON ' . $view['_on'] : '';
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if (!empty($view['_type'])) {
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// 指定JOIN类型 例如 RIGHT INNER LEFT 下一个表有效
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$type = strtoupper($view['_type']);
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$tableName .= ' ' . $type . ' JOIN ';
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if ($view == end($this->viewFields)) {
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$len = strlen($type) + 7;
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}
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}
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}
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$this->trueTableName = $len ? substr($tableName, 0, -$len) : $tableName;
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}
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return $this->trueTableName;
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}
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/**
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* 表达式过滤方法
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* @access protected
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* @param string $options 表达式
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* @return void
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*/
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protected function _options_filter(&$options)
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{
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$viewFields = [];
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foreach ($this->viewFields as $name => $val) {
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$k = isset($val['_as']) ? $val['_as'] : $name;
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$val = $this->_checkFields($name, $val);
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foreach ($val as $key => $field) {
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if (is_numeric($key)) {
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$viewFields[$field] = $k . '.' . $field;
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} elseif ('_' != substr($key, 0, 1)) {
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// 以_开头的为特殊定义
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if (false !== strpos($key, '*') || false !== strpos($key, '(') || false !== strpos($key, '.')) {
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//如果包含* 或者 使用了sql方法 则不再添加前面的表名
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$viewFields[$field] = $key;
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} else {
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$viewFields[$field] = $k . '.' . $key;
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}
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}
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}
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}
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if (empty($options['field'])) {
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$options['field'] = '*';
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}
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$options['field'] = $this->checkFields($options['field'], $viewFields);
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if (isset($options['group'])) {
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$options['group'] = $this->checkGroup($options['group'], $viewFields);
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}
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if (isset($options['where'])) {
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$options['where'] = $this->checkCondition($options['where'], $viewFields);
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}
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if (isset($options['order'])) {
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$options['order'] = $this->checkOrder($options['order'], $viewFields);
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}
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}
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/**
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* 检查是否定义了所有字段
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* @access protected
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* @param string $name 模型名称
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* @param array $fields 字段数组
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* @return array
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*/
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private function _checkFields($name, $fields)
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{
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if (false !== $pos = array_search('*', $fields)) {
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// 定义所有字段
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$fields = array_merge($fields, \think\Loader::table($name)->getFields());
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unset($fields[$pos]);
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}
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return $fields;
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}
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/**
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* 检查条件中的视图字段
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* @access protected
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* @param mixed $data 条件表达式
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* @param array $fields 视图字段数组
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* @return array
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*/
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protected function checkCondition($where, $viewFields)
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{
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if (is_array($where)) {
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$_where = [];
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foreach ($where as $field => $value) {
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if ('_complex' != $field) {
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$value = [$field => $value];
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$parent = 1;
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} else {
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$parent = 0;
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}
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foreach ($value as $key => $val) {
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if (0 !== strpos($key, '_')) {
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if ($items = preg_split('/[\|\&]/', $key, -1, PREG_SPLIT_OFFSET_CAPTURE)) {
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// 倒序找出的字段数组，以便从后向前替换
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$items = array_reverse($items);
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foreach ($items as $item) {
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if (isset($viewFields[$item[0]])) { // 存在视图字段
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$key = substr_replace($key, $viewFields[$item[0]], $item[1], strlen($item[0]));
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}
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}
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}
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if (isset($val[0]) && 'exp' == $val[0] && !empty($val[1])) {
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if (preg_match_all('/(?<![\'\.])\b(\w+)\b(?![\'])/', $val[1], $matches, PREG_OFFSET_CAPTURE)) {
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// 倒序找出的字段数组，以便从后向前替换
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$items = array_reverse($matches[0]);
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foreach ($items as $item) {
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if (isset($viewFields[$item[0]])) {
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$val[1] = substr_replace($val[1], $viewFields[$item[0]], $item[1], strlen($item[0]));
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}
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}
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}
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}
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} elseif (is_string($val) && ('__query' == $key || '_string' == $key)) {
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if (preg_match_all('/(?<![=\'\.])\b(\w+)\b(?![&\'])/', $val, $matches, PREG_OFFSET_CAPTURE)) {
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// 倒序找出的字段数组，以便从后向前替换
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$items = array_reverse($matches[0]);
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foreach ($items as $item) {
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if (isset($viewFields[$item[0]])) {
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$val = substr_replace($val, $viewFields[$item[0]], $item[1], strlen($item[0]));
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}
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}
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}
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}
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if ($parent) {
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$_where[$key] = $val;
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} else {
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$_where[$field][$key] = $val;
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}
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}
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}
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return $_where;
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} else {
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if (preg_match_all('/(?<![=\'\.])\b(\w+)\b(?![&\'])/', $where, $matches, PREG_OFFSET_CAPTURE)) {
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// 倒序找出的字段数组，以便从后向前替换
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$items = array_reverse($matches[0]);
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foreach ($items as $item) {
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if (isset($viewFields[$item[0]])) {
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$where = substr_replace($where, $viewFields[$item[0]], $item[1], strlen($item[0]));
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}
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}
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}
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return $where;
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}
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}
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/**
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* 检查Order表达式中的视图字段
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* @access protected
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* @param string|array $order 字段
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* @param array $fields 视图字段数组
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* @return string
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*/
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protected function checkOrder($order = '', $viewFields)
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{
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if (empty($order)) {
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return '';
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} elseif (is_string($order)) {
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$order = explode(',', $order);
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}
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$_order = [];
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foreach ($order as $key => $field) {
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if (is_numeric($key)) {
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if ($pos = strpos($field, ' ')) {
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$sort = substr($field, $pos);
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$field = substr($field, 0, $pos);
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} else {
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$sort = '';
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}
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} else {
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$sort = ' ' . $field;
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$field = $key;
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}
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if (isset($viewFields[$field])) {
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// 存在视图字段
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$field = $viewFields[$field] . $sort;
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}
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$_order[] = $field;
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}
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return $_order;
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}
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/**
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* 检查Group表达式中的视图字段
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* @access protected
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* @param string $group 字段
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* @param array $fields 视图字段数组
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* @return string
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*/
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protected function checkGroup($group = '', $viewFields)
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{
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if (empty($group)) {
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return '';
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} elseif (is_string($group)) {
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$group = explode(',', $group);
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}
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foreach ($group as &$field) {
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if (isset($viewFields[$field])) {
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// 存在视图字段
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$field = $viewFields[$field];
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}
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}
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return implode(',', $group);
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}
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/**
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* 检查fields表达式中的视图字段
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* @access protected
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* @param string $fields 字段
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* @param array $fields 视图字段数组
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* @return string
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*/
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protected function checkFields($fields = '*', $viewFields)
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{
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if (is_string($fields)) {
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if ('*' == $fields) {
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return $viewFields;
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} else {
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$fields = explode(',', $fields);
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}
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}
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$_fields = [];
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foreach ($fields as $key => $field) {
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if (is_numeric($key)) {
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if ($pos = strpos($field, ' ')) {
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$alias = substr($field, $pos);
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$field = substr($field, 0, $pos);
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} else {
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$alias = ' AS ' . $field;
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}
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} else {
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$alias = ' AS ' . $field;
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$field = $key;
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}
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if (strpos($field, '(')) {
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if (preg_match_all('/(?<!\s)\b(\w+)\b(?![\.\(])/', $field, $matches, PREG_OFFSET_CAPTURE)) {
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// 倒序找出的字段数组，以便从后向前替换
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$items = array_reverse($matches[0]);
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foreach ($items as $item) {
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if (isset($viewFields[$item[0]])) {
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$field = substr_replace($field, $viewFields[$item[0]], $item[1], strlen($item[0]));
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}
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}
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}
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} elseif (isset($viewFields[$field])) {
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// 存在视图字段
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$field = $viewFields[$field];
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}
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$_fields[] = $field . $alias;
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}
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return $_fields;
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}
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}
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