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import json
import time
# ========================================================
# Contact Model
# ========================================================
PAGE_SIZE = 100
class Contact:
# mock contacts database
db = {}
def __init__(self, id_=None, first=None, last=None, phone=None, email=None):
self.id = id_
self.first = first
self.last = last
self.phone = phone
self.email = email
self.errors = {}
def __str__(self):
return json.dumps(self.__dict__, ensure_ascii=False)
def update(self, first, last, phone, email):
self.first = first
self.last = last
self.phone = phone
self.email = email
def validate(self):
if not self.email:
self.errors['email'] = "Email Required"
existing_contact = next(filter(lambda c: c.id != self.id and c.email == self.email, Contact.db.values()), None)
if existing_contact:
self.errors['email'] = "Email Must Be Unique"
return len(self.errors) == 0
def save(self):
if not self.validate():
return False
if self.id is None:
if len(Contact.db) == 0:
max_id = 1
else:
max_id = max(contact.id for contact in Contact.db.values())
self.id = max_id + 1
Contact.db[self.id] = self
Contact.save_db()
return True
def delete(self):
del Contact.db[self.id]
Contact.save_db()
@classmethod
def count(cls):
time.sleep(2)
return len(cls.db)
@classmethod
def all(cls, page=1):
page = int(page)
start = (page - 1) * PAGE_SIZE
end = start + PAGE_SIZE
return list(cls.db.values())[start:end]
@classmethod
def search(cls, text):
result = []
for c in cls.db.values():
match_first = c.first is not None and text in c.first
match_last = c.last is not None and text in c.last
match_email = c.email is not None and text in c.email
match_phone = c.phone is not None and text in c.phone
if match_first or match_last or match_email or match_phone:
result.append(c)
return result
@classmethod
def load_db(cls):
with open('contacts.json', 'r') as contacts_file:
contacts = json.load(contacts_file)
cls.db.clear()
for c in contacts:
cls.db[c['id']] = Contact(c['id'], c['first'], c['last'], c['phone'], c['email'])
@staticmethod
def save_db():
out_arr = [c.__dict__ for c in Contact.db.values()]
with open("contacts.json", "w") as f:
json.dump(out_arr, f, indent=2)
@classmethod
def find(cls, id_):
id_ = int(id_)
c = cls.db.get(id_)
if c is not None:
c.errors = {}
return c
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