Tidy balsamiq viewer and remove unused Vue

app/assets/javascripts/blob/balsamiq/balsamiq_viewer.js

+/* global Flash */
+
+import sqljs from 'sql.js';
+
+class BalsamiqViewer {
+  constructor(viewer) {
+    this.viewer = viewer;
+    this.endpoint = this.viewer.dataset.endpoint;
+  }
+
+  loadFile() {
+    const xhr = new XMLHttpRequest();
+
+    xhr.open('GET', this.endpoint, true);
+    xhr.responseType = 'arraybuffer';
+
+    xhr.onload = this.renderFile.bind(this);
+    xhr.onerror = BalsamiqViewer.onError;
+
+    xhr.send();
+  }
+
+  renderFile(loadEvent) {
+    const container = document.createElement('ul');
+
+    this.initDatabase(loadEvent.target.response);
+
+    const previews = this.getPreviews();
+    const renderedPreviews = previews.map(preview => this.renderPreview(preview, container));
+
+    container.innerHTML = renderedPreviews.join('');
+    container.classList.add('list-inline');
+
+    this.viewer.appendChild(container);
+  }
+
+  initDatabase(data) {
+    const previewBinary = new Uint8Array(data);
+
+    this.database = new sqljs.Database(previewBinary);
+  }
+
+  getPreviews() {
+    const thumnails = this.database.exec('SELECT * FROM thumbnails');
+
+    return thumnails[0].values.map(BalsamiqViewer.parsePreview);
+  }
+
+  renderPreview(preview) {
+    const previewElement = document.createElement('li');
+
+    previewElement.innerHTML = this.renderTemplate(preview);
+
+    return previewElement.outerHTML;
+  }
+
+  renderTemplate(preview) {
+    let template = BalsamiqViewer.PREVIEW_TEMPLATE;
+
+    const title = this.database.exec(`SELECT * FROM resources WHERE id = '${preview.resourceID}'`);
+    const name = JSON.parse(title[0].values[0][2]).name;
+    const image = preview.image;
+
+    template = template.replace(/{{name}}/, name).replace(/{{image}}/, image);
+
+    return template;
+  }
+
+  static parsePreview(preview) {
+    return JSON.parse(preview[1]);
+  }
+
+  static onError() {
+    const flash = new Flash('Balsamiq file could not be loaded.');
+
+    return flash;
+  }
+}
+
+BalsamiqViewer.PREVIEW_TEMPLATE = `
+  <div class="panel panel-default">
+    <div class="panel-heading">{{name}}</div>
+    <div class="panel-body">
+      <img class="img-thumbnail" src="data:image/png;base64,{{image}}"/>
+    </div>
+  </div>
+`;
+
+export default BalsamiqViewer;

app/assets/javascripts/blob/balsamiq/index.js

-import Vue from 'vue';
-import sqljs from 'sql.js';
-
-export default class BalsamiqViewer {
-  constructor(el) {
-    this.el = el;
-    this.loadSqlFile();
-  }
-  
-  
-  loadSqlFile() {
-    var xhr = new XMLHttpRequest();
-    var self = this;
-    xhr.open('GET', this.el.dataset.endpoint, true);
-    xhr.responseType = 'arraybuffer';
-
-    xhr.onload = function(e) {
-      var list = document.createElement('ul');
-      var uInt8Array = new Uint8Array(this.response);
-      var db = new SQL.Database(uInt8Array);
-      var contents = db.exec("SELECT * FROM thumbnails");
-      var previews = contents[0].values.map((i)=>{return JSON.parse(i[1])});
-      previews.forEach((prev) => {
-        var li = document.createElement('li');
-        var title = db.exec(`select * from resources where id = '${prev.resourceID}'`)
-        var template = 
-        `<div class="panel panel-default">
-            <div class="panel-heading">${JSON.parse(title[0].values[0][2]).name}</div>
-            <div class="panel-body">
-              <img class="img-thumbnail" src="data:image/png;base64,${prev.image}"/>
-            </div>
-          </div>`;
-        li.innerHTML = template;
-        list.appendChild(li);
-      });
-      list.classList += 'list-inline';
-      self.el.appendChild(list);
-    };
-    xhr.send();
-  }
-}
\ No newline at end of file

app/assets/javascripts/blob/balsamiq_viewer.js

-import BalsamiqViewer from './balsamiq';
+import BalsamiqViewer from './balsamiq/balsamiq_viewer';
 
 document.addEventListener('DOMContentLoaded', () => {
-  new BalsamiqViewer(document.getElementById('js-balsamiq-viewer'));
-});
\ No newline at end of file
+  const balsamiqViewer = new BalsamiqViewer(document.getElementById('js-balsamiq-viewer'));
+  balsamiqViewer.loadFile();
+});

app/views/projects/blob/_bmpr.html.haml

 - content_for :page_specific_javascripts do
-  = page_specific_javascript_bundle_tag('common_vue')
   = page_specific_javascript_bundle_tag('balsamiq_viewer')
 
-.file-content#js-balsamiq-viewer{ data: { endpoint: namespace_project_raw_path(@project.namespace, @project, @id) } }
\ No newline at end of file
+.file-content#js-balsamiq-viewer{ data: { endpoint: namespace_project_raw_path(@project.namespace, @project, @id) } }