Members and petitions

members

/*var petitions = [
    {
        id: 1,
    },
    {
        id: 2
    },
    {
        id: 3
    }
];


var members = [
    {
        id: 1,
        petitions: [
            petitions[0],
            petitions[1]
        ]
    },
    {
        id: 2,
        petitions: [
            petitions[0]
        ]
    },
    {
        id: 3,
        petitions: [
            petitions[1],
            petitions[2]
        ]
    },
    {
        id: 4,
        petitions: [
            petitions[2]
        ]
    }
];

petitions[0].members = [
    members[0],
    members[1]
];

petitions[1].members = [
    members[0],
    members[2]
];

petitions[2].members = [
    members[2],
    members[3]
];*/

function Member(id) {
    this.id = id;
    this.petitions = [];

    this.getId = function() {
        return this.id;
    };

    this.getPetitionsSigned = function() {
        return this.petitions;
    };

    this.addPetition  = function(petition) {
        this.petitions.push(petition);
        petition.addMember(this);
    };
  }

  function Petition(id) {
      this.id = id;
      this.members = [];

      this.getId = function() {
          return this.id;
      };

      this.getSigningMembers = function() {
          return this.members;
      };

      this.addMember = function(member) {
          this.members.push(member);
      };
  }

a = new Member('a');
b = new Member('b');
c = new Member('c');
d = new Member('d');
e = new Member('e');

p1 = new Petition('1');
p2 = new Petition('2');
p3 = new Petition('3');
p4 = new Petition('4');
p5 = new Petition('5');
p6 = new Petition('6');
p7 = new Petition('7');

a.addPetition(p1);
a.addPetition(p5);
a.addPetition(p6);
b.addPetition(p1);
b.addPetition(p2);
b.addPetition(p5);
b.addPetition(p4);
c.addPetition(p2);
c.addPetition(p3);
c.addPetition(p7);
d.addPetition(p3);
d.addPetition(p4);
d.addPetition(p6);
e.addPetition(p7);

printSeparations(a);

function printSeparations(member, degrees) {

    var relatedMembers = separations([member], member.petitions),
        petitions,
        examinedMembers = [ member ],
        degrees = 1;

    do {
        console.log('----------------------------------------------------------');
        console.log('Degree ' + degrees);

        petitions = [];

        relatedMembers.forEach(function (member) {
            console.log(member.id);

            member.petitions.forEach(function (petition) {

                if (petitions.indexOf(petition) < 0) {
                    petitions.push(petition);
                }
            });
        });

        examinedMembers = examinedMembers.concat(relatedMembers);

        relatedMembers = separations(examinedMembers, petitions);

        degrees++;

    } while(relatedMembers.length > 0);
}

function separations(examinedMembers, petitions) {
    var members = [];

    petitions.forEach(function (petition) {
        petition.members.forEach(function (member) {
            if (examinedMembers.indexOf(member) < 0) {
                members.push(member);
                examinedMembers.push(member);
            }
        });
    });

    return members;
}