103 lines
3.0 KiB
PHP
103 lines
3.0 KiB
PHP
<?php
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namespace UElearning\Database;
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require_once UELEARNING_ROOT.'/config.php';
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require_once UELEARNING_LIB_ROOT.'/Database/Database.php';
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require_once UELEARNING_LIB_ROOT.'/Database/Exception.php';
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use UElearning\Exception;
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/**
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* 查推薦學習點時所需要的表格資料
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* Usage:
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*
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*/
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class DBRecommand extends Database
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{
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/**
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* 內部查詢用
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* @param string $where SQL WHERE子句
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* @return array 查詢結果
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*/
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protected function queryEdgeByWhere($where)
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{
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$sqlString = "SELECT DISTINCT ".$this->table('Edge').".Ti, ".$this->table('Edge').".Tj, ".$this->table('Edge').".MoveTime".
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" FROM ".$this->table('Edge')." WHERE ".$where;
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$query = $this->connDB->prepare($sqlString);
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$query->execute();
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$queryAllResult = $query->fetchAll();
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if(count($queryAllResult) != 0)
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{
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$result = array();
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foreach ($queryAllResult as $key => $thisResult)
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{
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array_push($result,
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array("current_point" => $thisResult['Ti'],
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"next_point" => $thisResult['Tj'],
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"move_time" => $thisResult['MoveTime']));
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}
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return $result;
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}
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else return null;
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}
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/**
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* 內部查詢用
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* @param string $where SQL WHERE子句
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* @return array 查詢結果
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*/
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protected function queryBelongByWhere($where)
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{
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$sqlString = "SELECT ".$this->table('TBelong').".Weights FROM ".$this->table('TBelong')." WHERE ".$where;
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$query = $this->connDB->prepare($sqlString);
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$query->execute();
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$queryResult = $query->fetchAll();
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if(count($queryResult) != 0)
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{
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$result = array();
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foreach ($queryResult as $key => $thisResult)
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{
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array_push($result, array("weight" => $thisResult['Weights']));
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}
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return $result;
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}
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else return null;
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}
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/**
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* 以下一個學習點和主題編號查詢屬於的權重資料
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* @param string $next_point 下一個學習點編號
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* @return array 查詢結果
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*/
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public function queryBelongByID($next_point,$theme_number)
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{
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$whereClause = $this->table('TBelong').".ThID = ".$this->connDB->quote($theme_number)." AND ".$this->table('TBelong').".TID = ".$this->connDB->quote($next_point);
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$AllOfResult = $this->queryBelongByWhere($whereClause);
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if(count($AllOfResult) != 0) return $AllOfResult[0];
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else return null;
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}
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/**
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* 以目前的學習點編號查詢下一個學習點的資訊
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* @param string $currentPoint 目前的學習點編號
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* @return array 查詢結果
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*/
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public function queryEdgeByID($currentPoint)
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{
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//echo "EEEEEEEEE";
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$AllOfResult = $this->queryEdgeByWhere($this->table('Edge').".Ti = ".$this->connDB->quote($currentPoint));
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if(count($AllOfResult) != 0) return $AllOfResult;
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else return null;
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}
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}
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