class Network():
    """A simple network definition"""
    
    def __init__(self):
        self.name = ""
        self.domains = []
        self.admins = []
        self.ip_blocks = []
        self.data = {}

class Domain():
    """A simple domain definition"""

    def __init__(self):
        self.name = ""
        self.admins = []
        self.data = {}

    def add_admin(self, admin):
        """Add an administrator for this network"""

        self.admins.append(admin)

class Person():
    """A simple person definition"""

    def __init__(self):
        self.name = ""
        self.surname = ""
        self.email = ""
        self.data = {}

class Data():
    """Abstract class for storing and getting information"""
    
    def __init__(self, config):
        self.config = config
        self.networks = []
        self.domains = []
        self.persons = []

    def parse_config(self):
        """Parse neccesary config params depending on the method used

        Abstract method"""
        
        pass
    
    def load_data(self):
        """Load data from defined source.

        Abstract method"""
        
        pass

    def get_networks(self):
        """Return all networks. Common method for all kind of storages."""
        
        if self.networks == None:
            self.load_data()

        return self.networks

    def get_domains(self):
        """Return all domains. Common method for all kind of storages."""
        
        if self.networks == None:
            self.load_data()

        return self.domains

    def get_persons(self):
        """Return all persons. Common method for all kind of storages."""
        
        if self.persons == None:
            self.load_data()

        return self.persons