完成RecommandPoint類別(需要做單元測試)

htdocs/lib/Database/DBRecommand.php

@@ -89,7 +89,7 @@ class DBRecommand extends Database
     /**
      * 以目前的學習點編號查詢下一個學習點的資訊
      * @param string $currentPoint 目前的學習點編號
-     * @return array 查詢結果
+     * @return array
      */
     public function queryEdgeByID($currentPoint)
     {

htdocs/lib/Recommand/RecommandPoint.php

@@ -37,6 +37,8 @@ class RecommandPoint
     const ALPHA=0.5;
 
     private $recommand;
+    private $theme;
+    private $activity;
 
 
     public function __construct()
@@ -52,11 +54,11 @@ class RecommandPoint
     private function computeNormalizationParameter($theme_number)
     {
         $normal = 0;  //正規化之後的GAMMA值
-        $EntitySum = 0;  //實體學習點分別算銓重之後的值
-        $VirtualSum = 0;  //虛擬學習點分別算銓重之後的值
+        $EntitySum = 0;  //實體學習點分別算權重之後的值
+        $VirtualSum = 0;  //虛擬學習點分別算權重之後的值
 
         $edge = $this->recommand->queryEdgeByID('0');
-        $theme = new Study\Theme($theme_number);
+        $this->theme = new Study\Theme($theme_number);
 
         for($i=0;$i<count($edge);$i++)
         {
@@ -76,12 +78,86 @@ class RecommandPoint
         return $EntitySum/$VirtualSum;
     }
 
+
+    /**
+     * 是否為可以學習的標的
+     * @param $target_id 標的編號
+     * @return bool enable or not
+     */
+    private function isEnableTargetId($activityObj,$target_id)
+    {
+        $target = new Target\Target($target_id);
+        if(!$activityObj->isTargetLearned($target_id)) return true;
+        else return false;
+    }
+
+    /**
+     * 過濾非法的標的
+     *
+     */
+    private function excludeIrregularTarget($point_list,$activityObj)
+    {
+        $regularTarget = array();
+        for($i=0;$i<count($point_list);$i++)
+        {
+            $nextPoint = $point_list[$i]["next_point"];
+            if($this->isEnableTargetId($a)ctivityObj,$nextPoint)) array_push($reregularTarget,$point_list[i]);
+        }
+        return $regularTarget;
+    }
+
     /**
      * 推薦學習點
+     * @param int $current_point 目前的標的編號
+     * @param int $theme_number 主題編號
+     * @param int activity_number 學習活動編號
      * @return array 學習點清單
      */
-    public function recommand($current_point,$theme_number,$activity_number)
+    public function recommand($current_point,$activity_number)
     {
+        $this->activity = new Study\StudyActivity($activity_number);
+        $themeID = $activity->getThemeId();
+        $this->theme = new Study\Theme($themeID);
+        $this->gamma = $this->computeNormalizationParameter($themeID);
+        $pointList = $this->recommand->queryEdgeByID($current_point);
+        $targetList = $this->excludeIrregularTarget($pointList,$this->activity);
 
+        //計算路徑的權重值
+        $pathCost = 0;
+        $VirtualPathCost = 0;
+        $recommand = array();
+        $isEntity = true;
+        for($i=0;$i<count($targetList);$i++)
+        {
+            $next_point = $targetList[$i]["next_point"];
+            $moveTime = $targetList[$i]["MoveTime"];
+            $nextPoint = new Target\Target($next_point);
+            $weight = $this->theme->getWeightByNextTarget($next_point);
+            if($nextPoint->isFullPeople())
+            {
+                $pastCost = 0;
+                $virtualCost = RecommandPoint::ALPHA * $this->gamma * ($wright/$nextPoint->getLearnTime());
+                $isEntity=false;
+            }
+            else
+            {
+                if($nextPoint->isNumberOfPeopleZero()) $Rj = 0;
+                else $Rj = $nextPoint->getMj()/$nextPoint->getPLj();
+                $pastCost = RecommandPoint::ALPHA * $this->gamma * ($weight * ($nextPoint->getS()-$Rj+1)/$moveTime + $nextPoint->getLearnTime());
+                $virtualCost = RecommandPoint::ALPHA * $this->gamma * ($wright/$nextPoint->getLearnTime());
+            }
+            array_push($recommand,array("nextPoint"=>$nextPoint,
+                                        "isEntity" => $isEntity,
+                                        "PathCost"=>$pathCost,
+                                        "VirtualCost"=>$virtualCost));
+        }
+
+        foreach($recommand as $key=>$value)
+        {
+            $tmp[$key] = $value["PathCost"];
+        }
+        array_multisort($tmp,SORT_DESC,$recommand,SORT_DESC);
+
+        return $recommand;
     }
 }

htdocs/lib/Study/Theme.php

@@ -6,6 +6,7 @@
 namespace UElearning\Study;
 
 require_once UELEARNING_LIB_ROOT.'/Database/DBTheme.php';
+require_once UELEARNING_LIB_ROOT.'/Database/DBRecommand.php';
 require_once UELEARNING_LIB_ROOT.'/Study/Exception.php';
 use UElearning\Database;
 use UElearning\Exception;
@@ -166,4 +167,16 @@ class Theme {
         return $this->queryResultArray['modify_time'];
     }
 
+    /**
+     * 取得下一個標的所屬主題的權重
+     * @param string $next_point
+     * @return int weight 權重
+     * @since 2.0.0
+     */
+    public function getWeightByNextTarget($next_point){
+        $belong = new Database\DBRecommand();
+        $weight = $belong->queryBelongByID($next_point,$this->id);
+        return $weight['weight'];
+    }
+
 }