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- import localForage from 'localforage';
- import path from 'path';
- import BookParser from './BookParser';
- class BookManager {
- async init() {
- this.books = {};
- const len = await localForage.length();
- for (let i = 0; i < len; i++){
- const key = await localForage.key(i);
- const keySplit = key.split('-');
- if (keySplit.length == 2 && keySplit[1] == 'meta') {
- let meta = await localForage.getItem(key);
- meta.data = await localForage.getItem(keySplit[0]);
- this.books[meta.key] = meta;
- this.books[meta.url] = meta;
- }
- }
- console.log(this.books);
- }
- async addBook(newBook, callback) {
- if (!this.books)
- await this.init();
- let meta = {url: newBook.url, path: newBook.path};
- meta.key = path.basename(newBook.path);
- const result = await this.parseBook(meta, newBook.data, callback);
- await localForage.setItem(meta.key, result.data);
- await localForage.setItem(`${meta.key}-meta`, meta);
- return result;
- }
- async getBook(meta, callback) {
- if (!this.books)
- await this.init();
- let result = undefined;
- if (meta.key)
- result = this.books[meta.key];
- else
- result = this.books[meta.url];
- if (result && !result.parsed) {
- result = await this.parseBook(result, result.data, callback);
- }
- return result;
- }
- async delBook(meta) {
- if (!this.books)
- await this.init();
- let book = undefined;
- if (meta.key)
- book = this.books[meta.key];
- else
- book = this.books[meta.url];
- if (book) {
- await localForage.removeItem(book.key);
- await localForage.removeItem(`${book.key}-meta`);
- delete this.books[book.key];
- delete this.books[book.url];
- }
- }
- async parseBook(meta, data, callback) {
- if (!this.books)
- await this.init();
- const parsed = new BookParser();
- const parsedMeta = await parsed.parse(data, callback);
- const result = Object.assign({}, meta, parsedMeta, {data, parsed});
- this.books[meta.key] = result;
- this.books[meta.url] = result;
- return result;
- }
- metaOnly(book) {
- let result = Object.assign({}, book);
- delete result.data;
- delete result.parsed;
- return result;
- }
- }
- export default new BookManager();
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