open_library 0.0.3

A flutter package to consume the openlibrary.org api in a simple way

open_library

A Flutter implementation of openlibrary.org api.

Features

• fetch book information using the https://openlibrary.org api ISBN
• supports 10 and 13 digit ISBN numbers
• adds authors and covers to the book result object
• covers can be easily used in flutter providing MemoryImages using Uint8List as covers

Example App

Install

In the pubspec.yaml of your flutter project, add the following dependency:

dependencies:
  open_library: <latest_version>

In your library add the following import:

import 'package:open_library/open_library.dart';

Getting started

Example:

import 'package:flutter/material.dart';
import 'package:open_library/open_library.dart';
import 'package:provider/provider.dart';
import 'screens/book_screen.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return Provider(
        create: (_) => OpenLibrary(),
        dispose: (_, OpenLibrary service) => service.dispose(),
        child: MaterialApp(
          title: 'Book Example',
          home: BookScreen()
        ));
  }
}

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

const ISBN1 = '9783608980806';
const ISBN2 = '0674995171';
const ISBN3 = '3596191130';

class BookScreen extends StatefulWidget {
  BookScreen({Key? key}) : super(key: key);

  final List<OLBook> books = [];

  @override
  State<BookScreen> createState() => _BookScreenState();
}

class _BookScreenState extends State<BookScreen> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.blueGrey,
      body: Column(
        children: [
          const SizedBox(height: 50.0),
          const Center(
              child: Text(
                "ISBN1:$ISBN1",
                style: TextStyle(color: Colors.white),
              )),
          const SizedBox(height: 20.0),
          const Center(
              child: Text(
                "ISBN2:$ISBN2",
                style: TextStyle(color: Colors.white),
              )),
          const SizedBox(height: 20.0),
          const Center(
              child: Text(
                "ISBN3:$ISBN3",
                style: TextStyle(color: Colors.white),
              )),
          const SizedBox(height: 20.0),
          SingleChildScrollView(
            child: ListView.builder(
              shrinkWrap: true,
              itemCount: widget.books.length,
              itemBuilder: (context, index) {
                return bookWidget(book: widget.books[index], context: context);
              },
            ),
          )
        ],
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () async {
          final OLBookBase book1 =
          await Provider.of<OpenLibrary>(context, listen: false)
              .getBookByISBN(isbn: ISBN1);
          print(book1.toString());
          if (book1 is OLBook) {
            setState(() {
              widget.books.add(book1);
            });
          }
          final OLBookBase book2 =
          await Provider.of<OpenLibrary>(context, listen: false)
              .getBookByISBN(isbn: ISBN2);
          print(book2.toString());
          if (book2 is OLBook) {
            setState(() {
              widget.books.add(book2);
            });
          }
          final OLBookBase book3 =
          await Provider.of<OpenLibrary>(context, listen: false)
              .getBookByISBN(isbn: ISBN3);
          print(book3.toString());
          if (book3 is OLBook) {
            setState(() {
              widget.books.add(book3);
            });
          }
        },
        child: const Icon(Icons.book),
      ),
    );
  }

  Widget bookWidget({required OLBook book, required BuildContext context}) {
    String author = '';
    if (book.authors.isNotEmpty) {
      author = book.authors.first.name.trim();
    }
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: Container(
        width: MediaQuery.of(context).size.width * 0.8,
        height: 80.0,
        decoration: BoxDecoration(
          color: Colors.white,
          borderRadius: BorderRadius.circular(10.0),
        ),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          children: [
            Column(
              mainAxisAlignment: MainAxisAlignment.center,
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Padding(
                  padding: const EdgeInsets.only(top:4.0, bottom: 4.0, left: 20.0),
                  child: Text(book.title, style: const TextStyle(color: Colors.black, fontSize: 14, fontWeight: FontWeight.bold),),
                ),
                Padding(
                  padding: const EdgeInsets.only(top:4.0, bottom: 4.0, left: 20.0),
                  child: Text(author, style: const TextStyle(color: Colors.black, fontSize: 12),),
                ),
              ],
            ),
            Padding(
              padding: const EdgeInsets.only(right: 20.0),
              child: SizedBox(
                height: book.covers.isNotEmpty ? 64.0 : 0,
                child: book.covers.isNotEmpty
                    ? Image.memory(book.covers.first)
                    : null,
              ),
            ),
          ],
        ),
      ),
    );
  }
}