a few changes to make A/B testing easier

frontend/src/storage.js

@@ -1,103 +0,0 @@
-import { isFile } from './utils';
-
-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];
-  }
-}
-
-export default class Storage {
-  constructor() {
-    try {
-      this.engine = localStorage || new Mem();
-    } catch (e) {
-      this.engine = new Mem();
-    }
-  }
-
-  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 files() {
-    const fs = [];
-    for (let i = 0; i < this.engine.length; i++) {
-      const k = this.engine.key(i);
-      if (isFile(k)) {
-        try {
-          fs.push(JSON.parse(this.engine.getItem(k)));
-        } catch (err) {
-          // obviously you're not a golfer
-          this.engine.removeItem(k);
-        }
-      }
-    }
-    return fs.sort((file1, file2) => {
-      const creationDate1 = new Date(file1.creationDate);
-      const creationDate2 = new Date(file2.creationDate);
-      return creationDate1 - creationDate2;
-    });
-  }
-
-  get numFiles() {
-    let length = 0;
-    for (let i = 0; i < this.engine.length; i++) {
-      const k = this.engine.key(i);
-      if (isFile(k)) {
-        length += 1;
-      }
-    }
-    return length;
-  }
-
-  getFileById(id) {
-    try {
-      return JSON.parse(this.engine.getItem(id));
-    } catch (e) {
-      return null;
-    }
-  }
-
-  remove(property) {
-    this.engine.removeItem(property);
-  }
-
-  addFile(id, file) {
-    this.engine.setItem(id, JSON.stringify(file));
-  }
-}