<?php
/*PLEASE DO NOT EDIT THIS CODE*/
/*This code was generated using the UMPLE 1.35.0.7523.c616a4dce modeling language!*/

class Student
{

  //------------------------
  // MEMBER VARIABLES
  //------------------------

  //Student Attributes
  private $number;

  //Student Associations
  private $mentors;

  //------------------------
  // CONSTRUCTOR
  //------------------------

  public function __construct($aNumber)
  {
    $this->number = $aNumber;
    $this->mentors = array();
  }

  //------------------------
  // INTERFACE
  //------------------------

  public function setNumber($aNumber)
  {
    $wasSet = false;
    $this->number = $aNumber;
    $wasSet = true;
    return $wasSet;
  }

  public function getNumber()
  {
    return $this->number;
  }

  public function getMentor_index($index)
  {
    $aMentor = $this->mentors[$index];
    return $aMentor;
  }

  public function getMentors()
  {
    $newMentors = $this->mentors;
    return $newMentors;
  }

  public function numberOfMentors()
  {
    $number = count($this->mentors);
    return $number;
  }

  public function hasMentors()
  {
    $has = $this->numberOfMentors() > 0;
    return $has;
  }

  public function indexOfMentor($aMentor)
  {
    $wasFound = false;
    $index = 0;
    foreach($this->mentors as $mentor)
    {
      if ($mentor->equals($aMentor))
      {
        $wasFound = true;
        break;
      }
      $index += 1;
    }
    $index = $wasFound ? $index : -1;
    return $index;
  }

  public static function minimumNumberOfMentors()
  {
    return 0;
  }

  public function addMentor($aMentor)
  {
    $wasAdded = false;
    if ($this->indexOfMentor($aMentor) !== -1) { return false; }
    $this->mentors[] = $aMentor;
    if ($aMentor->indexOfStudent($this) != -1)
    {
      $wasAdded = true;
    }
    else
    {
      $wasAdded = $aMentor->addStudent($this);
      if (!$wasAdded)
      {
        array_pop($this->mentors);
      }
    }
    return $wasAdded;
  }

  public function removeMentor($aMentor)
  {
    $wasRemoved = false;
    if ($this->indexOfMentor($aMentor) == -1)
    {
      return $wasRemoved;
    }

    $oldIndex = $this->indexOfMentor($aMentor);
    unset($this->mentors[$oldIndex]);
    if ($aMentor->indexOfStudent($this) == -1)
    {
      $wasRemoved = true;
    }
    else
    {
      $wasRemoved = $aMentor->removeStudent($this);
      if (!$wasRemoved)
      {
        $this->mentors[$oldIndex] = $aMentor;
        ksort($this->mentors);
      }
    }
    $this->mentors = array_values($this->mentors);
    return $wasRemoved;
  }

  public function addMentorAt($aMentor, $index)
  {  
    $wasAdded = false;
    if($this->addMentor($aMentor))
    {
      if($index < 0 ) { $index = 0; }
      if($index > $this->numberOfMentors()) { $index = $this->numberOfMentors() - 1; }
      array_splice($this->mentors, $this->indexOfMentor($aMentor), 1);
      array_splice($this->mentors, $index, 0, array($aMentor));
      $wasAdded = true;
    }
    return $wasAdded;
  }

  public function addOrMoveMentorAt($aMentor, $index)
  {
    $wasAdded = false;
    if($this->indexOfMentor($aMentor) !== -1)
    {
      if($index < 0 ) { $index = 0; }
      if($index > $this->numberOfMentors()) { $index = $this->numberOfMentors() - 1; }
      array_splice($this->mentors, $this->indexOfMentor($aMentor), 1);
      array_splice($this->mentors, $index, 0, array($aMentor));
      $wasAdded = true;
    } 
    else 
    {
      $wasAdded = $this->addMentorAt($aMentor, $index);
    }
    return $wasAdded;
  }

  public function equals($compareTo)
  {
    return $this == $compareTo;
  }

  public function delete()
  {
    $copyOfMentors = $this->mentors;
    $this->mentors = array();
    foreach ($copyOfMentors as $aMentor)
    {
      if ($aMentor->numberOfStudents() <= Mentor::minimumNumberOfStudents())
      {
        $aMentor->delete();
      }
      else
      {
        $aMentor->removeStudent($this);
      }
    }
  }

}
?>
<?php
/*PLEASE DO NOT EDIT THIS CODE*/
/*This code was generated using the UMPLE 1.35.0.7523.c616a4dce modeling language!*/

class Mentor
{

  //------------------------
  // MEMBER VARIABLES
  //------------------------

  //Mentor Attributes
  private $name;

  //Mentor Associations
  private $students;

  //------------------------
  // CONSTRUCTOR
  //------------------------

  public function __construct($aName, $allStudents)
  {
    $this->name = $aName;
    $this->students = array();
    $didAddStudents = $this->setStudents($allStudents);
    if (!$didAddStudents)
    {
      throw new Exception("Unable to create Mentor, must have 3 to 4 students. See https://manual.umple.org?RE002ViolationofAssociationMultiplicity.html");
    }
  }

  //------------------------
  // INTERFACE
  //------------------------

  public function setName($aName)
  {
    $wasSet = false;
    $this->name = $aName;
    $wasSet = true;
    return $wasSet;
  }

  public function getName()
  {
    return $this->name;
  }

  public function getStudent_index($index)
  {
    $aStudent = $this->students[$index];
    return $aStudent;
  }

  public function getStudents()
  {
    $newStudents = $this->students;
    return $newStudents;
  }

  public function numberOfStudents()
  {
    $number = count($this->students);
    return $number;
  }

  public function hasStudents()
  {
    $has = $this->numberOfStudents() > 0;
    return $has;
  }

  public function indexOfStudent($aStudent)
  {
    $wasFound = false;
    $index = 0;
    foreach($this->students as $student)
    {
      if ($student->equals($aStudent))
      {
        $wasFound = true;
        break;
      }
      $index += 1;
    }
    $index = $wasFound ? $index : -1;
    return $index;
  }

  public function isNumberOfStudentsValid()
  {
    $isValid = $this->numberOfStudents() >= self::minimumNumberOfStudents() && $this->numberOfStudents() <= self::maximumNumberOfStudents();
    return $isValid;
  }

  public static function minimumNumberOfStudents()
  {
    return 3;
  }

  public static function maximumNumberOfStudents()
  {
    return 4;
  }

  public function addStudent($aStudent)
  {
    $wasAdded = false;
    if ($this->indexOfStudent($aStudent) !== -1) { return false; }
    if ($this->numberOfStudents() >= self::maximumNumberOfStudents())
    {
      return $wasAdded;
    }

    $this->students[] = $aStudent;
    if ($aStudent->indexOfMentor($this) != -1)
    {
      $wasAdded = true;
    }
    else
    {
      $wasAdded = $aStudent->addMentor($this);
      if (!$wasAdded)
      {
        array_pop($this->students);
      }
    }
    return $wasAdded;
  }

  public function removeStudent($aStudent)
  {
    $wasRemoved = false;
    if ($this->indexOfStudent($aStudent) == -1)
    {
      return $wasRemoved;
    }

    if ($this->numberOfStudents() <= self::minimumNumberOfStudents())
    {
      return $wasRemoved;
    }

    $oldIndex = $this->indexOfStudent($aStudent);
    unset($this->students[$oldIndex]);
    if ($aStudent->indexOfMentor($this) == -1)
    {
      $wasRemoved = true;
    }
    else
    {
      $wasRemoved = $aStudent->removeMentor($this);
      if (!$wasRemoved)
      {
        $this->students[$oldIndex] = $aStudent;
        ksort($this->students);
      }
    }
    $this->students = array_values($this->students);
    return $wasRemoved;
  }

  public function setStudents($newStudents)
  {
    $wasSet = false;
    $verifiedStudents = array();
    foreach ($newStudents as $aStudent)
    {
      if (array_search($aStudent,$verifiedStudents) !== false)
      {
        continue;
      }
      $verifiedStudents[] = $aStudent;
    }

    if (count($verifiedStudents) != count($newStudents) || count($verifiedStudents) < self::minimumNumberOfStudents() || count($verifiedStudents) > self::maximumNumberOfStudents())
    {
      return $wasSet;
    }

    $oldStudents = $this->students;
    $this->students = array();
    foreach ($verifiedStudents as $aNewStudent)
    {
      $this->students[] = $aNewStudent;
      $removeIndex = array_search($aNewStudent,$oldStudents);
      if ($removeIndex !== false)
      {
        unset($oldStudents[$removeIndex]);
        $oldStudents = array_values($oldStudents);
      }
      else
      {
        $aNewStudent->addMentor($this);
      }
    }

    foreach ($oldStudents as $anOldStudent)
    {
      $anOldStudent->removeMentor($this);
    }
    $wasSet = true;
    return $wasSet;
  }

  public function addStudentAt($aStudent, $index)
  {  
    $wasAdded = false;
    if($this->addStudent($aStudent))
    {
      if($index < 0 ) { $index = 0; }
      if($index > $this->numberOfStudents()) { $index = $this->numberOfStudents() - 1; }
      array_splice($this->students, $this->indexOfStudent($aStudent), 1);
      array_splice($this->students, $index, 0, array($aStudent));
      $wasAdded = true;
    }
    return $wasAdded;
  }

  public function addOrMoveStudentAt($aStudent, $index)
  {
    $wasAdded = false;
    if($this->indexOfStudent($aStudent) !== -1)
    {
      if($index < 0 ) { $index = 0; }
      if($index > $this->numberOfStudents()) { $index = $this->numberOfStudents() - 1; }
      array_splice($this->students, $this->indexOfStudent($aStudent), 1);
      array_splice($this->students, $index, 0, array($aStudent));
      $wasAdded = true;
    } 
    else 
    {
      $wasAdded = $this->addStudentAt($aStudent, $index);
    }
    return $wasAdded;
  }

  public function equals($compareTo)
  {
    return $this == $compareTo;
  }

  public function delete()
  {
    $copyOfStudents = $this->students;
    $this->students = array();
    foreach ($copyOfStudents as $aStudent)
    {
      $aStudent->removeMentor($this);
    }
  }

}
?>