library_manager_cli.py

import streamlit as st
import os

# Function to load library from a file
def load_library():
    library = set()
    if os.path.exists('library.txt'):
        with open('library.txt', 'r') as f:
            for line in f:
                title, author, publication_year, genre, read_status = line.strip().split(',')
                library.add((
                    title, author, int(publication_year), genre, read_status.lower() == 'true'
                ))
    return library

# Function to save library to a file
def save_library(library):
    with open('library.txt', 'w') as f:
        for book in library:
            f.write(f"{book[0]},{book[1]},{book[2]},{book[3]},{book[4]}\n")
    st.success("Library saved to file.")

# Main function for the Streamlit app
def main():
    st.title("Personal Library Manager")
    library = load_library()

    menu = ["Add a Book", "Remove a Book", "Search for a Book", "Display All Books", "Display Statistics", "Exit"]
    choice = st.sidebar.selectbox("Menu", menu)

    if choice == "Add a Book":
        st.subheader("Add a Book")
        title = st.text_input("Enter the book title")
        author = st.text_input("Enter the author")
        publication_year = st.number_input("Enter the publication year", min_value=0, step=1)
        genre = st.text_input("Enter the genre")
        read_status = st.selectbox("Have you read this book?", ["Yes", "No"]) == "Yes"

        if st.button("Add Book"):
            book = (title, author, publication_year, genre, read_status)
            if book in library:
                st.warning("This book is already in your library!")
            else:
                library.add(book)  # Add book to set
                st.success("Book added successfully!")
                save_library(library)  # Save  library

    elif choice == "Remove a Book":
        st.subheader("Remove a Book")
        title = st.text_input("Enter the title of the book to remove")
        if st.button("Remove Book"):
            book_found = None
            for book in library:
                if book[0].lower() == title.lower():
                    book_found = book
                    break
            
            if book_found:
                library.remove(book_found)
                st.success("Book removed successfully!")
                save_library(library)
            else:
                st.error("Book not found.")

    elif choice == "Search for a Book":
        st.subheader("Search for a Book")
        search_choice = st.selectbox("Search by", ["Title", "Author"])
        if search_choice == "Title":
            title = st.text_input("Enter the title")
            if st.button("Search"):
                matching_books = [book for book in library if book[0].lower() == title.lower()]
                if matching_books:
                    st.write("Matching Books:")
                    for book in matching_books:
                        status = "Read" if book[4] else "Unread"
                        st.write(f"{book[0]} by {book[1]} ({book[2]}) - {book[3]} - {status}")
                else:
                    st.error("No matching books found.")
        elif search_choice == "Author":
            author = st.text_input("Enter the author")
            if st.button("Search"):
                matching_books = [book for book in library if book[1].lower() == author.lower()]
                if matching_books:
                    st.write("Matching Books:")
                    for book in matching_books:
                        status = "Read" if book[4] else "Unread"
                        st.write(f"{book[0]} by {book[1]} ({book[2]}) - {book[3]} - {status}")
                else:
                    st.error("No matching books found.")

    elif choice == "Display All Books":
        st.subheader("Your Library")
        if library:
            for i, book in enumerate(sorted(library), start=1):  # Sorted for consistent order
                status = "Read" if book[4] else "Unread"
                st.write(f"{i}. {book[0]} by {book[1]} ({book[2]}) - {book[3]} - {status}")
        else:
            st.write("Your library is empty.")

    elif choice == "Display Statistics":
        st.subheader("Statistics")
        total_books = len(library)
        if total_books == 0:
            st.write("No books in the library.")
        else:
            read_books = sum(1 for book in library if book[4])
            percentage_read = (read_books / total_books) * 100
            st.write(f"Total books: {total_books}")
            st.write(f"Percentage read: {percentage_read:.2f}%")

    elif choice == "Exit":
        save_library(library)
        st.write("Goodbye!")

if __name__ == "__main__":
    main()