CourseGeneration.php

<?php

/**
 *
 * @tableClass CourseGenerations
 * @foreignKey assetId
 *
 */
class CourseGeneration extends Asset
{
    /**
     * Home crosslisting
     *
     * @var CourseCrosslisting
     */
    protected $_homeCrosslisting;

    public function _init()
    {
        parent::_init();

        $this->_registerRelation(
            new Nmc_Db_Table_Relation_HasSubset(CourseDetails::getInstance(), $this, 'generation'));
        $this->_registerRelation(
            new Nmc_Db_Table_Relation_HasMany(CourseActivities::getInstance(), $this, 'generation', 'activities'));
        $this->_registerRelation(
            new Nmc_Db_Table_Relation_HasMany(CourseCredits::getInstance(), $this, 'generation', 'credits'));
        $this->_registerRelation(
            new Nmc_Db_Table_Relation_HasMany(CourseCrosslistings::getInstance(), $this, 'generation', 'crosslistings'));
        $this->_registerRelation(
            new Nmc_Db_Table_Relation_HasMany(CourseDfRemovals::getInstance(), $this, 'generation', 'dfRemovals'));
        $this->_registerRelation(
            new Nmc_Db_Table_Relation_HasMany(CoursePrerequisites::getInstance(), $this, 'generation', 'prerequisites'));
        $this->_registerRelation(
            new Nmc_Db_Table_Relation_HasOne(CourseGradTieIns::getInstance(), $this, 'generation', 'gradTieIn'));

        $this->_homeCrosslisting = $this->_getHomeCrosslisting();
    }

    public function _clone()
    {
        $parentId = $this->getPrimaryKey();

        // duplicate parent record
        parent::_clone();

        $this->_homeCrosslisting = clone $this->_homeCrosslisting;

        if($parentId) {
            $this->parent = $parentId;
        }
    }

    public function _get($name)
    {
        switch($name)
        {
            case 'subject':
            case 'courseNumber':
            case 'courseLetter':
            case 'integratedStudies':
                return $this->_homeCrosslisting->$name;
                break;
            default:
                return parent::_get($name);
        }
    }

    public function _set($name, $value)
    {
        switch($name)
        {
            case 'subject':
            case 'courseNumber':
            case 'courseLetter':
            case 'integratedStudies':
                $this->_homeCrosslisting->$name = $value;
                break;
            default:
                parent::_set($name, $value);
                break;
        }
    }

    protected function _save()
    {
        $db = $this->getTable()->getAdapter();
        $parentTransaction = false;
        try {
            $db->beginTransaction();
            $parentTransaction = true;
        } catch (PDOException $e) {
            if($e->getMessage() != 'There is already an active transaction') {
                throw $e;
            }
        }

        $saveCourse = $this->course;
        $saveCreationTime = $this->creationTime;
        if($this->request instanceof Request) {
            $saveRequest = $this->request->toArray();
        }
        $saveRequestId = $this->_data['request'];

        try {
            if(!$this->course) {
                $course = Courses::getInstance()->fetchNew();
                $course->save();
                $this->course = $course->getPrimaryKey();
            }
            if(!$this->creationTime) {
                $this->creationTime = time();
            }

            if($this->request instanceof Request) {
                $this->request->save();
                $this->_data['request'] = $this->request->getPrimaryKey();
            }

            $this->_setHomeCrosslisting($this->_homeCrosslisting);

            parent::_save();

            if($parentTransaction) {
                $db->commit();
            }
        } catch(Exception $e) {
            if($parentTransaction) {
                $db->rollBack();
            }

            $this->course = $saveCourse;
            $this->creationTime = $saveCreationTime;
            if($this->request instanceof Request) {
                $this->_data['request'] = $saveRequestId;
                $this->request->setFromArray($saveRequest);
            }
            throw $e;
        }
    }

    public function getAssetId()
    {
        return $this->assetId;
    }

    public function getParentGeneration($official = false)
    {
        if(!$this->parent) {
            return null;
        }

        $parentGeneration = CourseGenerations::getInstance()->findOne($this->parent);
        $foo = $parentGeneration->type;
        while($official && $parentGeneration && $parentGeneration->type != 'official') {
            $parentGeneration = CourseGenerations::getInstance()->findOne($parentGeneration->parent);
        }
        return $parentGeneration;
    }

    public function getChildGenerations()
    {
        return CourseGenerations::getInstance()->fetchWithParentGeneration($this);
    }

    public function isEssentialStudies($college = null)
    {
        $courseCode = CourseCodes::getInstance()->findBySubjectNumberAndLetter($this->subject,
                                                                               $this->courseNumber,
                                                                               $this->courseLetter);
        if (is_null($courseCode)) {
            return false;
        }
        return CourseEsDesignations::getInstance()->isCourseCodeEssentialStudies($courseCode, $college);
    }

    public function getEssentialStudiesAreas(College $college = null)
    {
        $courseCode = CourseCodes::getInstance()->findBySubjectNumberAndLetter($this->subject,
                                                                               $this->courseNumber,
                                                                               $this->courseLetter);
        if (is_null($courseCode)) {
            if (is_null($college)) {
                return array(array());
            } else {
                return array();
            }
        }

        return CourseEsDesignations::getInstance()->getEssentialStudiesAreas($courseCode, $college);
    }

    public function getHomeCollege()
    {
        $department = $this->getHomeDepartment();
        $college = $department->college;

        return $college;
    }

    public function getHomeDepartment()
    {
        $subject = Subjects::getInstance()->fetchSubject($this->subject);
        $department = $subject->department;

        return $department;
    }

    /**
     * Returns a reference to the home crosslist
     *
     * @return CourseCrosslisting
     */
    protected function _getHomeCrosslisting()
    {
        $crosslistings = $this->crosslistings;
        foreach($crosslistings as $key => $crosslisting) {
            if($crosslisting->type == 'home listing') {
                $homeCrosslisting = $crosslisting;
            }
        }
        if(!$homeCrosslisting) {
            $homeCrosslisting = CourseCrosslistings::getInstance()->fetchNew();
            $homeCrosslisting->type = 'home listing';
        }
        return $homeCrosslisting;
    }

    protected function _setHomeCrosslisting($home)
    {
        $crosslistings = $this->crosslistings;
        $found = false;
        foreach($crosslistings as $key => $crosslisting) {
            if($crosslisting->type == 'home listing') {
                $crosslistings[$key] = $home;
                $found = true;
                break;
            }
        }
        if(!$found) {
            $crosslistings[] = $home;
        }
    }
}