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