feat: Add helper functions for Book

helpers/book_helpers.py

@@ -0,0 +1,78 @@
+from typing import List
+from sqlalchemy.orm import Session
+from models.book import Book
+from schemas.book import BookSchema
+
+def get_all_books(db: Session) -> List[BookSchema]:
+    """
+    Retrieve all books from the database.
+
+    Args:
+        db (Session): SQLAlchemy database session.
+
+    Returns:
+        List[BookSchema]: List of book schemas.
+    """
+    books = db.query(Book).all()
+    return [BookSchema.from_orm(book) for book in books]
+
+def get_book_by_id(db: Session, book_id: str) -> BookSchema:
+    """
+    Retrieve a book by its ID from the database.
+
+    Args:
+        db (Session): SQLAlchemy database session.
+        book_id (str): ID of the book to retrieve.
+
+    Returns:
+        BookSchema: Book schema if found, None otherwise.
+    """
+    book = db.query(Book).filter(Book.id == book_id).first()
+    return BookSchema.from_orm(book) if book else None
+
+def get_books_by_author(db: Session, author: str) -> List[BookSchema]:
+    """
+    Retrieve books by author from the database.
+
+    Args:
+        db (Session): SQLAlchemy database session.
+        author (str): Author name to search for.
+
+    Returns:
+        List[BookSchema]: List of book schemas for the given author.
+    """
+    books = db.query(Book).filter(Book.author == author).all()
+    return [BookSchema.from_orm(book) for book in books]
+
+def get_books_by_isbn(db: Session, isbn: str) -> List[BookSchema]:
+    """
+    Retrieve books by ISBN from the database.
+
+    Args:
+        db (Session): SQLAlchemy database session.
+        isbn (str): ISBN to search for.
+
+    Returns:
+        List[BookSchema]: List of book schemas for the given ISBN.
+    """
+    books = db.query(Book).filter(Book.isbn == isbn).all()
+    return [BookSchema.from_orm(book) for book in books]
+
+def search_books(db: Session, query: str) -> List[BookSchema]:
+    """
+    Search for books based on a query string.
+
+    Args:
+        db (Session): SQLAlchemy database session.
+        query (str): Search query string.
+
+    Returns:
+        List[BookSchema]: List of book schemas matching the search query.
+    """
+    books = db.query(Book).filter(
+        Book.title.ilike(f"%{query}%") |
+        Book.author.ilike(f"%{query}%") |
+        Book.description.ilike(f"%{query}%") |
+        Book.isbn.ilike(f"%{query}%")
+    ).all()
+    return [BookSchema.from_orm(book) for book in books]