Create models.py

models.py

@@ -0,0 +1,98 @@
+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
+