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April 16, 2019 17:05
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Some bugs here I don't know why
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| //Get performance trend [=>Not getting desired result yet.] | |
| public function get_performance_trend(){ | |
| global $DB; | |
| //Query for all enrolled course first | |
| $sql = "select c.id as id, c.shortname,c.category from {course} c | |
| inner join {enrol} e on e.courseid = c.id | |
| inner join {user_enrolments} u on e.id=u.enrolid | |
| where u.userid=15"; //total is 6 | |
| $courses = $DB->get_records_sql($sql); | |
| $i = 0; | |
| $data = array(); | |
| $sql = 'select id, name from {course_categories} where parent=0'; | |
| $primaryLevels = $DB->get_records_sql($sql); | |
| foreach($primaryLevels as $category){ | |
| $sumperformance = 0; | |
| $avgperformance = 0; | |
| $pcount = 0; | |
| print('category '.$category->id."\n"); | |
| //every course avg grade | |
| foreach ($courses as $course){ | |
| $flc = 0; | |
| //check which category the course belong (Primary 1-6) | |
| $flc = $this->checkFirstLevelCategory($course->category); | |
| //print the course we are dealing with | |
| print('Course with category '.$flc); | |
| print_r(json_encode($course)); | |
| if($category->id == $flc){ | |
| print("\n".'Category test passed'."\n"); | |
| //get user grade of this quiz | |
| $sumgrade=0; | |
| $quizcount=0; | |
| $avggrade=0; | |
| // print(' courseid '.$course->id); | |
| $sql ="select id from {quiz} where course=".$course->id; | |
| $coursequizs = $DB->get_records_sql($sql); | |
| //there will be many quizs of the course. | |
| foreach ($coursequizs as $coursequiz){ | |
| //select avg(sumgrades)... won't work cuz sumgrades has NULL value | |
| $sqlcoursequizgrade ="select sumgrades from {quiz_attempts} where quiz=".$coursequiz->id." and userid=15 order by timemodified desc limit 1"; | |
| $grade = $DB->get_records_sql($sqlcoursequizgrade); | |
| // print_r($grade); | |
| foreach($grade as $grade){ | |
| $sumgrade+=(float)$grade->sumgrades; | |
| print_r($sumgrade); | |
| $quizcount++; | |
| }//foreach grade | |
| if($quizcount!=0){ | |
| $avggrade=(float)$sumgrade/$quizcount; | |
| } | |
| }//foreach quiz | |
| // $data[] = array('course'=>$course->shortname, 'grade'=> (float)$avggrade); | |
| $sumperformance += $avggrade; | |
| // print('Sum performance '.$sumperformance); | |
| $pcount++; | |
| }//end if | |
| }//foreach course | |
| if($pcount != 0){ //validate to avoid infinity error | |
| print('pcount '.$pcount); | |
| $avgperformance = $sumperformance/$pcount; | |
| } | |
| //save into the array | |
| $data[] = array('form'=>$category->name, 'performance'=>$avgperformance); | |
| $i++; | |
| }//foreach category | |
| print('Loopcount '.$i); | |
| if(empty($data[0])){ | |
| $data[0] = array('form'=>"NoRecord", 'performance'=> (float)0); | |
| } | |
| $this->set_graphic_type('linechart'); | |
| return $this->generate_chart(json_encode($data));//convert to json object | |
| }//end get_performance_trend | |
| //utility function for performance trend | |
| public function checkFirstLevelCategory($cid){ | |
| global $DB; | |
| $sql = 'select parent from {course_categories} where id='.$cid; | |
| $parent = $DB->get_record_sql($sql); | |
| if($parent->parent != 0){ | |
| $this->checkFirstLevelCategory(($parent->parent)); | |
| }else{ | |
| print("\n".'cFLC() returns '.$cid); | |
| return $cid; | |
| } | |
| }//end getFirstLevelCategory |
To correctly implemented the recursion, the line 88 should probably read
return $this->checkFirstLevelCategory(($parent->parent));
why $flc is not storing the value returned
Because the method does not return the value on line 88.
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I don't know why $flc is not storing the value returned from checkFirstLevelCategory()