Codes 4 Week13

Author: canbula

Week13/course.py

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+from db import Firebase
+from professor import Professor
+
+
+class Course:
+    def __init__(self, user_id: str, f: Firebase) -> None:
+        self.course_id = ""
+        self.user_id = user_id
+        self.title = ""
+        self.description = ""
+        self.ref = f.ref.child("courses")
+        self.professor = Professor(user_id, f)
+
+    def create(self):
+        self.course_id = self.ref.push(
+            {
+                "title": self.title,
+                "description": self.description,
+                "user_id": self.user_id,
+            }
+        ).key
+        return self
+
+    def save(self):
+        self.ref.child(self.course_id).set(
+            {
+                "title": self.title,
+                "description": self.description,
+                "user_id": self.user_id,
+            }
+        )
+        return self
+
+    def update(self, updates: dict = {}):
+        if updates:
+            self.title = updates.get("title", self.title)
+            self.description = updates.get("description", self.description)
+            self.user_id = updates.get("user_id", self.user_id)
+        self.save()
+        return self
+
+    def get(self):
+        course = self.ref.child(self.course_id).get()
+        if not course:
+            return self
+        self.title = course["title"]
+        self.description = course["description"]
+        self.user_id = course["user_id"]
+        return self
+
+    def delete(self):
+        self.ref.child(self.course_id).delete()
+        self.title = ""
+        self.description = ""
+        self.user_id = ""
+        return self
+
+    def __str__(self):
+        return f"{self.title} - {self.description} by {self.professor.title} {self.professor.fullname}"
+
+
+if __name__ == "__main__":
+    f = Firebase()
+    f.login("prof@university.edu", "password")
+    course = Course(f.get_user_id(), f)
+    course.title = "Python Programming"
+    course.description = (
+        "Basic Concepts of Python Programming for Undergraduate Students"
+    )
+    course.create()
+    print(course.course_id)
+    print(course)
+    course.title = "Advanced Python Programming"
+    course.update()
+    print(course)
+    course.delete()
+    print(course)

Week13/db.py

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+import firebase_admin  # pip install firebase-admin
+from firebase_admin import credentials, db
+import pyrebase  # pip install pyrebase4
+
+
+class Firebase:
+    def __init__(self):
+        #####################################################################
+        # Use your own information for your Firebase project below.         #
+        #####################################################################
+        # You need to download the credentials file from your Firebase      #
+        # project settings. Click on the "Generate new private key" button  #
+        # and save the file as "credentials.json" in the same directory.    #
+        CREDENTIALS_FILE = "credentials.json"
+        # You can find your database URL in your Firebase project settings. #
+        # The format is "https://<project_id>.firebasedatabase.app/".       #
+        DATABASE_URL = ""
+        # You can find your API key in your Firebase project settings.      #
+        # The format is "AIza...".                                          #
+        # If you can't find your API key, create a new web app in your      #
+        # Firebase project, then you will see the API key.                  #
+        API_KEY = ""
+        # You can find your project ID in your Firebase project settings.   #
+        PROJECT_ID = ""
+        #####################################################################
+        # You can find these information in your Firebase project settings. #
+        # You don't need to change the following code.                      #
+        #####################################################################
+        self.cred = credentials.Certificate(CREDENTIALS_FILE)
+        firebase_admin.initialize_app(
+            self.cred,
+            {
+                "databaseURL": DATABASE_URL,
+            },
+        )
+        self.ref = db.reference("/")
+        self.config = {
+            "apiKey": API_KEY,
+            "authDomain": f"{PROJECT_ID}.firebaseapp.com",
+            "databaseURL": DATABASE_URL,
+            "storageBucket": f"{PROJECT_ID}.appspot.com",
+        }
+        self.firebase = pyrebase.initialize_app(self.config)
+        self.auth = self.firebase.auth()
+
+    def login(self, email, password):
+        user = self.auth.sign_in_with_email_and_password(email, password)
+        return user
+
+    def register(self, email, password):
+        user = self.auth.create_user_with_email_and_password(email, password)
+        return user
+
+    def get_current_user(self):
+        return self.auth.current_user
+
+    def get_user_id(self):
+        return self.auth.current_user["localId"]
+
+    def get_user_email(self):
+        return self.auth.current_user["email"]
+
+    def logout(self):
+        self.auth.current_user = None
+
+
+if __name__ == "__main__":
+    f = Firebase()
+    print(f.ref.get())
+    f.ref.set({"name": "Bora Canbula"})
+    print(f.ref.get())
+    try:
+        f.login("prof@university.edu", "password")
+    except Exception as e:
+        f.register("prof@university.edu", "password")
+    print(f.get_current_user())

Week13/professor.py

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+from db import Firebase
+
+
+class Professor:
+    def __init__(self, user_id: str, f: Firebase) -> None:
+        self.user_id = user_id
+        self.title = ""
+        self.fullname = ""
+        self.department = ""
+        self.university = ""
+        self.courses = []
+        self.f = f
+        self.ref = f.ref.child("professors").child(self.user_id)
+        if self.ref.get():
+            self.get()
+
+    def save(self):
+        self.ref.set(
+            {
+                "title": self.title,
+                "fullname": self.fullname,
+                "department": self.department,
+                "university": self.university,
+            }
+        )
+        return self
+
+    def update(self, updates: dict = {}):
+        if updates:
+            self.title = updates.get("title", self.title)
+            self.fullname = updates.get("fullname", self.fullname)
+            self.department = updates.get("department", self.department)
+            self.university = updates.get("university", self.university)
+        self.save()
+        return self
+
+    def get(self):
+        professor = self.ref.get()
+        if not professor:
+            return self
+        self.title = professor["title"]
+        self.fullname = professor["fullname"]
+        self.department = professor["department"]
+        self.university = professor["university"]
+        courses = self.f.ref.child("courses").get()
+        if courses:
+            for course_id in courses:
+                course = courses[course_id]
+                if course["user_id"] == self.user_id:
+                    self.courses.append(course)
+        return self
+
+    def delete(self):
+        self.ref.delete()
+        self.title = ""
+        self.fullname = ""
+        self.department = ""
+        self.university = ""
+        return self
+
+    def __str__(self):
+        return f"{self.title} {self.fullname} @ {self.department}, {self.university}"
+
+
+if __name__ == "__main__":
+    f = Firebase()
+    f.login("prof@university.edu", "password")
+    professor = Professor(f.get_user_id(), f)
+    professor.title = "Assoc. Prof. Dr."
+    professor.fullname = "Bora Canbula"
+    professor.department = "Computer Engineering"
+    professor.university = "Manisa Celal Bayar University"
+    professor.save()
+    print(professor)
+    print(professor.courses)
+    professor.update(
+        {
+            "title": "Prof. Dr.",
+            "department": "Department of Computer Engineering",
+        }
+    )
+    print(professor)
+    professor.delete()