python-flask-api [GALAGAR]

flask-library/.gitignore

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+.venv
+
+__pycache__/
+*.pyc

flask-library/app.py

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+from flask import Flask
+from flask_restful import Api
+from models import db
+from controller import LibraryResource, LibraryListResource
+
+#using mysql instead of sql lite
+import pymysql
+
+pymysql.install_as_MySQLdb()
+
+app = Flask(__name__)
+api = Api(app)
+
+app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root:C0nf!d3nt@localhost/flask_library'
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+
+db.init_app(app)
+
+@app.before_request
+def create_tables():
+    db.create_all()
+
+api.add_resource(LibraryListResource, '/api/library')
+api.add_resource(LibraryResource, '/api/library/<string:isbn>')
+
+if __name__ == '__main__':
+    app.run(debug=True)

flask-library/controller/__init__.py

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+from .library_controller import LibraryListResource, LibraryResource

flask-library/controller/library_controller.py

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+from flask_restful import Resource
+from flask import request
+from service import LibraryService
+from models import db
+
+class LibraryListResource(Resource):
+    def get(self):
+        books = LibraryService.get_all()
+        return [book.to_dict() for book in books], 200
+
+    def post(self):
+        try:
+            data = request.get_json()
+
+            if 'isbn' not in data or 'title' not in data or 'author' not in data:
+                return {'message': "ISBN, title, and author are required"}, 400
+
+            book = LibraryService.create(data)
+            return book.to_dict(), 201
+        except Exception as e:
+            db.session.rollback()
+            return {"error": "Unexpected error occured", "details": str(e)}, 500
+
+class LibraryResource(Resource):
+    def get(self, isbn):
+        book = LibraryService.get_by_id(isbn)
+        if not book:
+            return {"message": "Book not found"}, 404
+        return book.to_dict(), 200
+
+    def put(self, isbn):
+        try:
+            data = request.get_json()
+            book = LibraryService.update(isbn, data)
+            if not book:
+                return {"message": "Book not found"}, 404
+            return book.to_dict(), 200
+        except Exception as e:
+            db.session.rollback()
+            return {"error": "Unexpected error occured", "details": str(e)}, 500
+
+    def delete(self, isbn):
+        try:
+            book = LibraryService.delete(isbn)
+            if not book:
+                return {"message": "Book not found"}, 404
+            return {"message": f"Book with ISBN {isbn} deleted"}, 200
+        except Exception as e:
+            db.session.rollback()
+            return {"error": "Unexpected error occured", "details": str(e)}, 500

flask-library/models/__init__.py

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+from flask_sqlalchemy import SQLAlchemy
+
+db = SQLAlchemy()
+
+from .library import Library

flask-library/models/library.py

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+from . import db
+
+class Library(db.Model):
+
+    # kung library ang tablename sa mysql mag error
+    __tablename__ = 'books_library'
+
+    isbn = db.Column(db.String(13), primary_key=True)
+    title = db.Column(db.String(80), nullable=False)
+    author = db.Column(db.String(80), nullable=False)
+
+    def to_dict(self):
+        return {
+            "isbn": self.isbn,
+            "title": self.title,
+            "author": self.author
+        }

flask-library/repositories/__init__.py

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+from .library_repository import LibraryRepository

flask-library/repositories/library_repository.py

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+from models import Library, db
+
+class LibraryRepository:
+    @staticmethod
+    def find_all():
+        return Library.query.all()
+
+    @staticmethod
+    def find_by_id(isbn):
+        return Library.query.get(isbn)
+
+    @staticmethod
+    def save(book):
+        db.session.add(book)
+        db.session.commit()
+        return book
+
+    @staticmethod
+    def update(isbn, data: dict):
+        book = Library.query.get(isbn)
+        if not book:
+            return None
+
+        for key, value in data.items():
+            if hasattr(book, key):
+                setattr(book, key, value)
+
+        db.session.commit()
+        return book
+
+    @staticmethod
+    def delete(isbn):
+        book = Library.query.get(isbn)
+        if not book:
+            return None
+
+        db.session.delete(book)
+        db.session.commit()
+        return book

flask-library/requirements.txt

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+aniso8601==10.0.1
+blinker==1.9.0
+click==8.3.0
+colorama==0.4.6
+Flask==3.1.2
+Flask-RESTful==0.3.10
+Flask-SQLAlchemy==3.1.1
+greenlet==3.2.4
+itsdangerous==2.2.0
+Jinja2==3.1.6
+MarkupSafe==3.0.2
+PyMySQL==1.1.2
+pytz==2025.2
+six==1.17.0
+SQLAlchemy==2.0.43
+typing_extensions==4.15.0
+Werkzeug==3.1.3

flask-library/service/__init__.py

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+from .library_service import LibraryService

flask-library/service/library_service.py

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+from repositories import LibraryRepository
+from models import Library
+
+class LibraryService:
+    @staticmethod
+    def get_all():
+        return LibraryRepository.find_all()
+
+    @staticmethod
+    def get_by_id(isbn):
+        return LibraryRepository.find_by_id(isbn)
+
+    @staticmethod
+    def create(data):
+        book = Library(
+            isbn = data['isbn'],
+            title = data['title'],
+            author = data['author']
+        )
+
+        return LibraryRepository.save(book)
+
+    @staticmethod
+    def update(isbn, data):
+        return LibraryRepository.update(isbn, data)
+
+    @staticmethod
+    def delete(isbn):
+        return LibraryRepository.delete(isbn)