src/AppBundle/Component/Export/Course/OverviewStudentExporter.php

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<?php

namespace AppBundle\Component\Export\Course;

use AppBundle\Common\ArrayToolkit;
use AppBundle\Component\Export\Exporter;

class OverviewStudentExporter extends Exporter
{
    public function canExport()
    {
        $user = $this->getUser();
        try {
            $tryManageCourse = $this->getCourseService()->tryManageCourse($this->parameter['courseId']);
        } catch (\Exception $e) {
            return false;
        }

        return $user->isAdmin() || !empty($tryManageCourse);
    }

    public function getCount()
    {
        return $this->getCourseMemberService()->countMembers($this->conditions);
    }

    public function getTitles()
    {
        $titles = array(
            'task.learn_data_detail.nickname',
            'task.learn_data_detail.finished_rate',
        );
        $tasks = $this->getAllTaskByCourseId();

        $taskTitles = ArrayToolkit::column($tasks, 'title');

        return array_merge($titles, $taskTitles);
    }

    public function getContent($start, $limit)
    {
        $course = $this->getCourseService()->getCourse($this->parameter['courseId']);

        $members = $this->getCourseMemberService()->searchMembers(
            $this->conditions,
            $this->parameter['orderBy'],
            $start,
            $limit
        );

        $userIds = ArrayToolkit::column($members, 'userId');
        $taskCount = $this->countTasksByCourseId();

        list($users, $tasks, $taskResults) = $this->getReportService()->getStudentDetail($course['id'], $userIds, $taskCount);

        $datas = array();

        $status = array(
            'finish' => '已完成',
            'start' => '学习中',