added modified data fetcher based on the implementation of adrlau, as well as update to the todo in the readme

data_fetcher/data_fetcher.py

@@ -0,0 +1,163 @@
+# A simple script to fetch bookdata from multiple sources to the library format.
+# Felter hver bok bør ha: (pr. 01.04.2023)
+# ISBN
+# Forfatter
+# Tittel
+# Utgivelsesår
+# Antall sider
+# Sjanger
+# Språk
+# Bruker som har lånt boken
+# Dato på når boken ble lånt ut
+
+import requests
+import json
+
+def get_isbn():
+    # TODO: validate ISBN using checksums
+    # TODO: wrap in a loop until either ISBN is valid or user quits
+    # isbn = 9780135166307 #input gir ett isbn 10 eller 13 nummer   # kaster en error.
+    # isbn = "0801859034" #input gir ett isbn 10 eller 13 nummer
+
+    isbn = input("Scan a book or add manually: ") # input gir ett isbn 10 eller 13 nummer
+    if (len(isbn) == 10 or len(isbn) == 13):
+        return isbn
+    else:
+        return None
+
+def get_from_api(isbn) -> dict:
+    try:
+        json_input = json.loads(requests.get("https://openlibrary.org/isbn/"+str(isbn)+".json").text)
+    except:
+        return f"Error fetching data for: {isbn}"  # TODO: add more databases for fetching info from
+    
+    try:
+        authors = json_input.get("authors")
+        for i in range(len(authors)):
+            authors[i] = json.loads(requests.get("https://openlibrary.org"+str(authors[i].get("key"))+".json").text).get("name") #henter navn fra api
+        
+        authors = list(set(authors))
+        title = json_input.get("title")
+        publish_date = json_input.get("publish_date")
+        number_of_pages = json_input.get("number_of_pages")
+        languages = json_input.get("languages")
+        
+        for i in range(len(languages)):
+            languages[i] = json.loads(requests.get("https://openlibrary.org"+str(languages[i].get("key"))+".json").text).get("name")
+        
+        book_data = {
+                    "isbn": isbn,
+                    "authors": authors,
+                    "title": title,
+                    "publishDate": publish_date,
+                    "numberOfPages": number_of_pages,
+                    "languages": languages,
+                    }
+        
+        return book_data
+        
+    except:
+        return f"Error processing data for {isbn}"
+
+def push_to_database(book_info, db_file = "book_info.dat") -> None:
+    print(f"Pushing to database: Writing to file {db_file}")  # TODO: actually connect to our database and push there
+    f = open(db_file, "w")
+    json.dump(book_info, f)
+    f.close()
+
+
+def validate_book_info_with_user(book_info) -> bool:
+    """
+    Takes a book_info dictionary and asks the user to update fields until they're satisfied with the information.
+    Updates the inputted dictionary directly.
+
+    Input:
+    * book_info: dict holding fields of book information
+    
+    Returns:
+    * bool: True if book is now valid, false if something went wrong
+    """
+    print("Is the following information correct?")
+    print(book_info)
+
+    answer = input("y/n: ")
+    if answer == "n":
+        print("What is wrong?")
+        incorrrect_category = input("""
+        1. Authors
+        2. ...
+        3. ...
+        q. Quit (done/continue)
+        """)
+        is_corrected = False
+
+        while not is_corrected:
+            if incorrrect_category == "1":
+                authors = input("Input correct authors separated by ',': ")
+                #TODO: actually put the authors into the book info json thing
+            elif incorrrect_category =="q":
+                is_corrected = True
+            else:
+                print("No valid option supplied.")
+        
+        return True  # Book has been corrected and is (presumably) valid
+    elif answer == "y":
+        return True  # Book information is valid
+    else:
+        return False  # Something went wrong
+    
+def add_book_location(book_info) -> None:
+    """
+    Prompts the user for which bookcase and shelf the book came from and adds them to the book_info dictionary.
+
+    Inputs:
+    * book_info: dict holding the book information
+
+    Returns:
+    * None: the book_info dict is updated diretly
+    """
+    print("Where is the book located?")
+
+    bookcase = input("Bookcase: ")
+    shelf = input("Shelf: ")
+
+    book_info["bookcase"] = bookcase
+    book_info["shelf"] = shelf
+
+if __name__ == '__main__':
+    is_running = True
+    while is_running:
+        # Asking user for ISBN and fetching data online
+        isbn = get_isbn()
+        if isbn is not None:
+            book_info = get_from_api(isbn)
+            print(f"Fetched: {book_info}")
+        else:
+            book_info = {}
+            print("Error: Inputted ISBN was invalid.")
+
+        # Adding physical location (case, shelf) to the book
+        add_book_location(book_info)
+
+        # Ensuring the user is satisfied with the information
+        book_is_correct = validate_book_info_with_user(book_info)
+
+        # Pushing to the database to commit the valid book
+        if book_is_correct:
+            print("Should we push this book to the database?")
+            push_answer = input("y/n: ")
+            if push_answer == "y":
+                push_to_database(book_info)
+            else:
+                pass
+        else:
+            print("Error: Book was not corrected properly, we might try again.")
+
+        # Moving on to the next book which should be added to the library
+        print("Should we continue?")
+        cont_answer = input("y/n: ")
+        if cont_answer == "y":
+            is_running = True
+        else:
+            is_running = False
+