import { arrayToB64, isFile } from './utils'; import OwnedFile from './ownedFile'; class Mem { constructor() { this.items = new Map(); } get length() { return this.items.size; } getItem(key) { return this.items.get(key); } setItem(key, value) { return this.items.set(key, value); } removeItem(key) { return this.items.delete(key); } key(i) { return this.items.keys()[i]; } } class Storage { constructor() { try { this.engine = localStorage || new Mem(); } catch (e) { this.engine = new Mem(); } this._files = this.loadFiles(); } loadFiles() { const fs = new Map(); for (let i = 0; i < this.engine.length; i++) { const k = this.engine.key(i); if (isFile(k)) { try { const f = new OwnedFile(JSON.parse(this.engine.getItem(k))); if (!f.id) { f.id = f.fileId; } fs.set(f.id, f); } catch (err) { // obviously you're not a golfer this.engine.removeItem(k); } } } return fs; } get id() { let id = this.engine.getItem('device_id'); if (!id) { id = arrayToB64(crypto.getRandomValues(new Uint8Array(16))); this.engine.setItem('device_id', id); } return id; } get totalDownloads() { return Number(this.engine.getItem('totalDownloads')); } set totalDownloads(n) { this.engine.setItem('totalDownloads', n); } get totalUploads() { return Number(this.engine.getItem('totalUploads')); } set totalUploads(n) { this.engine.setItem('totalUploads', n); } get referrer() { return this.engine.getItem('referrer'); } set referrer(str) { this.engine.setItem('referrer', str); } get enrolled() { return JSON.parse(this.engine.getItem('experiments') || '[]'); } enroll(id, variant) { const enrolled = this.enrolled; // eslint-disable-next-line no-unused-vars if (!enrolled.find(([i, v]) => i === id)) { enrolled.push([id, variant]); this.engine.setItem('experiments', JSON.stringify(enrolled)); } } get files() { return Array.from(this._files.values()).sort( (a, b) => a.createdAt - b.createdAt ); } get user() { try { return JSON.parse(this.engine.getItem('user')); } catch (e) { return null; } } set user(info) { return this.engine.setItem('user', JSON.stringify(info)); } getFileById(id) { return this._files.get(id); } get(id) { return this.engine.getItem(id); } set(id, value) { return this.engine.setItem(id, value); } remove(property) { if (isFile(property)) { this._files.delete(property); } this.engine.removeItem(property); } addFile(file) { this._files.set(file.id, file); this.writeFile(file); } writeFile(file) { this.engine.setItem(file.id, JSON.stringify(file)); } writeFiles() { this._files.forEach(f => this.writeFile(f)); } clearLocalFiles() { this._files.forEach(f => this.engine.removeItem(f.id)); this._files = new Map(); } async merge(files = []) { let incoming = false; let outgoing = false; let downloadCount = false; for (const f of files) { if (!this.getFileById(f.id)) { this.addFile(new OwnedFile(f)); incoming = true; } } const workingFiles = this.files.slice(); for (const f of workingFiles) { const cc = await f.updateDownloadCount(); if (cc) { await this.writeFile(f); } downloadCount = downloadCount || cc; outgoing = outgoing || f.expired; if (f.expired) { this.remove(f.id); } else if (!files.find(x => x.id === f.id)) { outgoing = true; } } return { incoming, outgoing, downloadCount }; } } export default new Storage();