vueui: second batch of fixes from @vanecat:

- support for 'cdx-simulator'
- add loading spinner

config.yaml

@@ -13,6 +13,7 @@ collections:
         archive_paths: ./sample_archive/warcs/
 
     ukwa: cdx+https://www.webarchive.org.uk/wayback/archive/cdx
+    is: cdx+http://beta.vefsafn.is/is/cdx
 
 # Settings for each collection
 use_js_obj_proxy: true

pywb/static/loading-spinner/loading-spinner.js

@@ -0,0 +1,156 @@
+class LoadingSpinner {
+  static #instanceCount = 0;
+  constructor(config={}) {
+    this.config = {initialState:true, animationDuration:500, text:'Loading...', ...config};
+
+    if (LoadingSpinner.#instanceCount > 0) {
+      throw new Error('Cannot make a second loading spinner (aka progress indicator)');
+    }
+    LoadingSpinner.#instanceCount++;
+
+
+    const uuid = Math.floor(Math.random()*1000);
+    this.classes = {
+      el: `loading-spinner-${uuid}`,
+      mask: `loading-spinner-mask-${uuid}`,
+      hidden: `hidden-${uuid}`,
+      spinning: `spinning-${uuid}`
+    };
+
+    this.state = config.initialState;
+    this.addStyles();
+    this.addDom();
+  }
+
+  toggle() {
+    if (this.state) {
+      this.setOn();
+    } else {
+      this.setOff();
+    }
+  }
+
+  setOn() {
+    this.state = true;
+    this.el.classList.remove(this.classes.hidden);
+    setTimeout(function setSpinning() {
+      this.el.classList.add(this.classes.spinning);
+    }.bind(this), 10);
+  }
+
+  setOff() {
+    this.state = false;
+    this.el.classList.remove(this.classes.spinning);
+    setTimeout(function setHidden() {
+      this.el.classList.add(this.classes.hidden);
+    }.bind(this), this.config.animationDuration);
+  }
+
+  addDom() {
+    const text = this.config.text;
+    const dom = `
+<div class="${this.classes.mask} ${this.classes[this.config.initialState ? 'spinning':'hidden']}">
+  <div class="${this.classes.el}">
+    <div data-loading-spinner="circle1"></div>
+    <div data-loading-spinner="circle2"></div>
+    <div data-loading-spinner="circle3"></div>
+    <div data-loading-spinner="circle4"></div>
+    <span data-loading-spinner="text">${text}</span>
+  </div>
+</div>`;
+    const wrapEl = document.createElement('div');
+    wrapEl.innerHTML = dom;
+    this.el = wrapEl.firstElementChild;
+    document.getElementsByTagName('body')[0].appendChild(this.el);
+  }
+
+  addStyles() {
+    const duration = this.config.animationDuration;
+    const stylesheetEl = document.createElement('style');
+    document.head.appendChild(stylesheetEl);
+
+    const rules = [`
+.${this.classes.mask} {
+    position: fixed;
+    top: 0;
+    left: 0;
+    width: 100vw;
+    height: 100vh;
+    z-index: 900;
+
+    display: flex;
+    justify-content: center;
+    align-items: center;
+
+    background-color: rgba(255,255,255, .85);
+
+    opacity: 0;
+    transition: opacity ${duration}ms ease-in;
+}`,`
+.${this.classes.mask}.${this.classes.spinning} {
+    opacity: 1;
+}`,`
+.${this.classes.mask}.${this.classes.hidden} {
+    display: none;
+}`,`
+.${this.classes.el} {
+    position: relative;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    width: 200px;
+    height: 200px;
+}`,`
+[data-loading-spinner^=circle] {
+    position: absolute;
+    margin: 0;
+    border-radius: 50%;
+    border-left-color: transparent;
+    border-right-color: transparent;
+}`,`
+[data-loading-spinner=circle1] {
+    border: 3px solid #444444;/* #0D4B9F; */
+    width: 70%;
+    height: 70%;
+    animation: rotate 2s cubic-bezier(0.26, 1.36, 0.74, -0.29) infinite;
+}`,`
+[data-loading-spinner=circle2] {
+    border: 3px solid #ddd;/* #E0EDFF; */
+    width: 80%;
+    height: 80%;
+    animation: rotateReverse 2s cubic-bezier(0.26, 1.36, 0.74, -0.29) infinite;
+}`,`
+[data-loading-spinner=circle3] {
+    border: 3px solid #656565;/* #005CDC; */
+    width: 90%;
+    height: 90%;
+    animation: rotate 2s cubic-bezier(0.26, 1.36, 0.74, -0.29) infinite;
+}`,`
+[data-loading-spinner=circle4] {
+    border: 3px solid #aaa; /* #94B6E5; */
+    width: 100%;
+    height: 100%;
+    animation: rotateReverse 2s cubic-bezier(0.26, 1.36, 0.74, -0.29) infinite;
+}`,`
+@keyframes rotate {
+    from {
+        transform: rotateZ(-360deg)
+    }
+    to {
+        transform: rotateZ(0deg)
+    }
+}`,`
+@keyframes rotateReverse {
+    from {
+        transform: rotateZ(360deg)
+    }
+    to {
+        transform: rotateZ(0deg)
+    }
+}`,`
+[data-loading-spinner=text] {
+    font-size: 15px;
+}`];
+      rules.forEach(rule => stylesheetEl.sheet.insertRule(rule));
+  }
+}

pywb/static/loading-spinner/test.html

@@ -0,0 +1,12 @@
+<html>
+<head>
+<script src="loading-spinner.js"></script>
+</head>
+<body>
+<button onclick="loadingSpinner.setOn()">load...</button>
+<script>
+    const loadingSpinner = new LoadingSpinner();
+    loadingSpinner.el.addEventListener('click', e => loadingSpinner.setOff());
+</script>
+</body>
+</html>

pywb/templates/banner.html

@@ -31,17 +31,12 @@ window.banner_info = {
 
 {% else %}
 
+{% if ui.vue_timeline_banner %}
+<script src="{{ static_prefix }}/loading-spinner/loading-spinner.js"></script>
 <link rel='stylesheet' href='{{ static_prefix }}/vue_banner.css'/>
 <script src="{{ static_prefix }}/vue/vueui.js"></script>
-<script>
-  VueUI.main("{{ static_prefix }}", "{{ url }}", "{{ wb_prefix }}", "{{ timestamp }}", "{{ ui.logo }}");
-</script>
-
-{% if ui.vue_timeline_banner %}
-<div id="app" style="width: 100%; height: 200px"></div>
 {% endif %}
 
-
 {% endif %}
 
 

pywb/templates/frame_insert.html

@@ -21,6 +21,13 @@ html, body
 </head>
 <body style="margin: 0px; padding: 0px;">
 
+{% if ui.vue_timeline_banner %}
+<div id="app" style="width: 100%; height: 200px"></div>
+<script>
+    VueUI.main("{{ static_prefix }}", "{{ url }}", "{{ wb_prefix }}", "{{ timestamp }}", "{{ ui.logo }}");
+</script>
+{% endif %}
+
 <div id="wb_iframe_div">
 <iframe id="replay_iframe" frameborder="0" seamless="seamless" scrolling="yes" class="wb_iframe" allow="autoplay; fullscreen"></iframe>
 </div>

pywb/templates/query.html

@@ -13,6 +13,7 @@
 <script src="{{ static_prefix }}/query.js"></script>
 {% else %}
 
+<script src="{{ static_prefix }}/loading-spinner/loading-spinner.js"></script>
 <script src="{{ static_prefix }}/vue/vueui.js"></script>
 
 {% endif %}
@@ -36,6 +37,10 @@
 {% endif %}
 
 
+{% if ui.vue_calendar_ui %}
+<div id="app" style="width: 100%; height: 100%"></div>
+{% endif %}
+
 <script>
   var text = {
       months: {
@@ -81,8 +86,4 @@
 
 </script>
 
-{% if ui.vue_calendar_ui %}
-<div id="app" style="width: 100%; height: 100%"></div>
-{% endif %}
-
 {% endblock %}

pywb/vueui/src/App.vue

@@ -67,7 +67,7 @@ export default {
       currentPeriod: null,
       currentSnapshot: null,
       msgs: [],
-      showFullView: false,
+      showFullView: true,
       showTimelineView: true,
       maxTimelineZoomLevel: PywbPeriod.Type.day,
       config: {
@@ -79,7 +79,6 @@ export default {
   },
   components: {Timeline, TimelineBreadcrumbs, CalendarYear},
   mounted: function() {
-    this.init();
   },
   computed: {
     sessionStorageUrlKey() {
@@ -133,21 +132,13 @@ export default {
         window.location.href = this.config.prefix + "*/" + newUrl;
       }
     },
-    init() {
+    setData(/** @type {PywbData} data */ data) {
-      this.config.url = this.config.initialView.url;
+
-      if (this.config.initialView.title) {
+      // data-set will usually happen at App INIT (from parent caller)
-        this.config.title = this.config.initialView.title;
+      this.$set(this, "snapshots", data.snapshots);
-      }
+      this.$set(this, "currentPeriod", data.timeline);
-      if (this.config.initialView.timestamp === undefined) {
+
-        this.showFullView = true;
+      // get last-saved current period from previous page/app refresh (if there was such)
-        this.showTimelineView = true;
-      } else {
-        this.showFullView = false;
-        this.showTimelineView = true;
-        if (this.currentPeriod.children.length) {
-          this.setSnapshot(this.config.initialView);
-        }
-      }
       if (window.sessionStorage) {
         const currentPeriodId = window.sessionStorage.getItem(this.sessionStorageUrlKey);
         if (currentPeriodId) {
@@ -157,12 +148,23 @@ export default {
           }
         }
       }
+
+      // signal app is DONE setting and rendering data; ON NEXT TICK
+      this.$nextTick(function isDone() {
+        this.$emit('data-set-and-render-completed');
+      }.bind(this));
     },
     setSnapshot(view) {
-      // convert to snapshot objec to support proper rendering of time/date
+      // turn off calendar (aka full) view
+      this.showFullView = false;
+
+      // convert to snapshot object to support proper rendering of time/date
       const snapshot = new PywbSnapshot(view, 0);
+
+      // set config current URL and title
       this.config.url = view.url;
       this.config.title = view.title;
+
       this.gotoSnapshot(snapshot);
     }
   }

pywb/vueui/src/cdx-simulator/README.md

@@ -0,0 +1,41 @@
+# How to incorporate CDX Simulator
+
+Place following code snippets in **index.js**
+
+## Import  `CDXQueryWorkerSimulator` Mock Class
+
+It is the mock class to the main javascript built-in `Worker` class:
+
+   ``import { CDXQueryWorkerSimulator } from "./cdx-simulator/cdx-simulator";``
+
+## Initialize `queryWorker` with Mock Class
+
+Update `const queryWorker = ...` initialization in `CDXLoader` class, `loadCDX()` method
+   
+### by replacing it
+
+```
+const queryWorker = new CDXQueryWorkerSimulator(this.staticPrefix + "/queryWorker.js");
+```
+
+### or by adding a conditional, so you can go back and forth between simulator and real CDX-data-loader:
+
+for example with a URL-hash flag conditional:
+
+```
+const queryWorker = new (window.location.hash.indexOf('cdx_simulate') >= 0 ? CDXQueryWorkerSimulator : Worker)(this.staticPrefix + "/queryWorker.js");
+```
+
+NOTE: where if the url contains '#cdx_simulate' the mock simulator will be used; using a URL hash does not interfere with the main URL parsing of the PYWB app
+
+## Configure Simulation 
+
+Add a **local** storage (from Chrome Dev Tools > Application > Local Storage)
+
+```
+{"count":5000, "yearStart":2020, "yearEnd":2022, "fetchTime":3000}
+```
+
+where `count` is the total records, yearStart and yearEnd are self-explanatory, and `fetchTime` is how long it should take
+
+![cdx loader config](pywb-vueui-cdx-simulator-config.jpg)

pywb/vueui/src/cdx-simulator/cdx-record-sample.json

@@ -0,0 +1,197 @@
+[
+  {
+    "urlkey": "com,example)/",
+    "timestamp": "20130729195151",
+    "url": "http://test@example.com/",
+    "mime": "warc/revisit",
+    "status": "-",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "591",
+    "offset": "355",
+    "filename": "example-url-agnostic-revisit.warc.gz",
+    "source": "pywb:url-agnost-example.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/",
+    "timestamp": "20140127171200",
+    "url": "http://example.com",
+    "mime": "text/html",
+    "status": "200",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "1046",
+    "offset": "334",
+    "filename": "dupes.warc.gz",
+    "source": "pywb:dupes.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/",
+    "timestamp": "20140127171251",
+    "url": "http://example.com",
+    "mime": "warc/revisit",
+    "status": "-",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "553",
+    "offset": "11875",
+    "filename": "dupes.warc.gz",
+    "source": "pywb:dupes.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/?example=1",
+    "timestamp": "20140103030321",
+    "url": "http://example.com?example=1",
+    "mime": "text/html",
+    "status": "200",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "1043",
+    "offset": "333",
+    "filename": "example.warc.gz",
+    "source": "pywb:example.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/?example=1",
+    "timestamp": "20140103030341",
+    "url": "http://example.com?example=1",
+    "mime": "warc/revisit",
+    "status": "-",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "553",
+    "offset": "1864",
+    "filename": "example.warc.gz",
+    "source": "pywb:example.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/?example=2",
+    "timestamp": "20140103030321",
+    "url": "http://example.com?example=2",
+    "mime": "text/html",
+    "status": "200",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "1987",
+    "offset": "0",
+    "filename": "example-extra.warc",
+    "source": "pywb:example-extra.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/?example=2",
+    "timestamp": "20140603030341",
+    "url": "http://example.com?example=2",
+    "mime": "warc/revisit",
+    "status": "-",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "504",
+    "offset": "2701",
+    "filename": "example-extra.warc",
+    "source": "pywb:example-extra.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/?example=2",
+    "timestamp": "20140603030351",
+    "url": "http://example.com?example=2",
+    "mime": "warc/revisit",
+    "status": "-",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36B",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "504",
+    "offset": "2701",
+    "filename": "example-extra.warc",
+    "source": "pywb:bad.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/?example=2",
+    "timestamp": "20140703030321",
+    "url": "http://example.com?example=2",
+    "mime": "text/html",
+    "status": "200",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "1987",
+    "offset": "0",
+    "filename": "non-existent.warc",
+    "source": "pywb:bad.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/?example=3",
+    "timestamp": "20140603030351",
+    "url": "http://example.com?example=3",
+    "mime": "warc/revisit",
+    "status": "-",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36B",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "504",
+    "offset": "2701",
+    "filename": "example-extra.warc",
+    "source": "pywb:bad.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example)/?example=3",
+    "timestamp": "20140703030321",
+    "url": "http://example.com?example=3",
+    "mime": "text/html",
+    "status": "200",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "1987",
+    "offset": "0",
+    "filename": "non-existent.warc",
+    "source": "pywb:bad.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example,test,arc)/",
+    "timestamp": "20140216050221",
+    "url": "http://example.com/",
+    "mime": "text/html",
+    "status": "200",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "1656",
+    "offset": "151",
+    "filename": "example.arc",
+    "source": "pywb:example-arc-test.cdx",
+    "source-coll": "pywb"
+  },
+  {
+    "urlkey": "com,example,test,gz,arc)/",
+    "timestamp": "20140216050221",
+    "url": "http://example.com/",
+    "mime": "text/html",
+    "status": "200",
+    "digest": "B2LTWWPUOYAH7UIPQ7ZUPQ4VMBSVC36A",
+    "redirect": "-",
+    "robotflags": "-",
+    "length": "856",
+    "offset": "171",
+    "filename": "example.arc.gz",
+    "source": "pywb:example-arc-test.cdx",
+    "source-coll": "pywb"
+  }
+]

pywb/vueui/src/cdx-simulator/cdx-simulator.js

@@ -0,0 +1,83 @@
+const getMonthDays = (y, mZeroIndex) => {
+  const firstOfNextMonth = new Date(y, mZeroIndex+1, 1);
+  const lastOfMonth = new Date(firstOfNextMonth - 1000 * 3600 * 24);
+  return lastOfMonth.getDate();
+}
+
+// read dynamically from local storage options for make
+let simulateCdxOptions = window.localStorage.getItem('cdx_simulate');
+simulateCdxOptions = !!simulateCdxOptions ? JSON.parse(simulateCdxOptions) : {};
+
+class CDXRecordFactory {
+  constructor() {}
+
+  async make(url, opts={}) {
+    // defaults
+    opts = {count:1000, yearStart:2015, yearEnd:2022, fetchTime:5*1000, ...opts};
+
+    const records = [];
+
+    const total = opts.count;
+    const years = [opts.yearStart, opts.yearEnd];
+    const avgPerMonth = total / (years[1]-years[0]) / 12;
+    // exaggerate max count per day, any day can hold up to 10th of the month's captures
+    const maxPerDay = avgPerMonth/10;
+
+    let startTime = Math.floor(new Date().getTime());
+    let recordI = 0;
+
+    for(let y=years[0]; y<=years[1]; y++) {
+      for(let m=1; m<=12; m++) {
+        for(let d=1; d<=getMonthDays(y, m-1); d++) {
+          const dayTimestampPrefix = y + ('0'+m).substr(-2) + ('0'+d).substr(-2);
+          // minumum to maximum count (random value)
+          const timesCount = Math.floor(Math.random() * maxPerDay);
+
+          const times = {}; // make sure we save to hash to de-dupe
+          for(let i=0; i<timesCount; i++) {
+            const newTime = [Math.floor(Math.random()*24), Math.floor(Math.random()*60), Math.floor(Math.random()*60)].join('');
+            times[newTime] = 1;
+          }
+          Object.keys(times).sort().forEach(time => {
+            records.push({url, timestamp: dayTimestampPrefix+time});
+          });
+        }
+      }
+    }
+    let endTime = Math.floor(new Date().getTime());
+
+    if (opts.fetchTime && opts.fetchTime > endTime - startTime) { // wait till we reac fetchTime
+      const p = new Promise((resolve) => {
+        setTimeout(() => {
+          resolve(true);
+        }, (opts.fetchTime - (endTime - startTime)));
+      });
+      await p;
+    }
+    return records;
+  }
+}
+
+export class CDXQueryWorkerSimulator {
+  constructor(workerPath) {
+    this.messageCb = [];
+    this.recordFactory = new CDXRecordFactory();
+  }
+
+
+  addEventListener(type, cb) {
+    if (type === 'message') {
+      this.messageCb = cb;
+    }
+  }
+
+  async postMessage({type, queryUrl}) {
+    const records = await this.recordFactory.make(queryUrl, simulateCdxOptions);
+    records.forEach(record => this.messageCb({data: {type: 'cdxRecord', record}}));
+    this.messageCb({data: {type: 'finished'}});
+  }
+
+  terminate() {
+    return true;
+  }
+}

pywb/vueui/src/cdx-simulator/test.html

@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>CDX Simulator</title>
+    <script src="cdx-simulator.js"></script>
+</head>
+<body>
+<script>
+    const factory = new CDXRecordFactory();
+    console.log(factory.make('test.com'));
+</script>
+</body>
+</html>

pywb/vueui/src/components/LoadingSpinner.vue

@@ -0,0 +1,139 @@
+<template>
+  <div class="pywb-loading-spinner-mask" :class="{hidden: isHidden, spinning: isSpinning}" @click="setOff">
+    <div class="pywb-loading-spinner">
+      <div data-loading-spinner="circle1"></div>
+      <div data-loading-spinner="circle2"></div>
+      <div data-loading-spinner="circle3"></div>
+      <div data-loading-spinner="circle4"></div>
+      <span data-loading-spinner="text">{{text}}</span>
+    </div>
+  </div>
+</template>
+
+<script>
+let elStyle = null;
+export default {
+  name: "LoadingSpinner",
+  props: ['text', 'isLoading'],
+  mounted() {
+    this.setOnOff();
+    this.$watch('isLoading', this.setOnOff);
+  },
+  data() {
+    return {
+      isSpinning: '',
+      isHidden: ''
+    }
+  },
+  methods: {
+    setOnOff() {
+      if (this.isLoading) {
+        this.setOn();
+      } else {
+        this.setOff();
+      }
+    },
+    setOn() {
+      this.isHidden = false;
+      setTimeout(function setSpinning() {
+        this.isSpinning = true;
+      }.bind(this), 100);
+    },
+    setOff() {
+      this.isSpinning = false;
+      setTimeout(function setHidden() {
+        this.isHidden = true;
+      }.bind(this), 500);
+    }
+  }
+}
+</script>
+
+<style scoped>
+.pywb-loading-spinner-mask.spinning {
+  opacity: 1;
+}
+.pywb-loading-spinner-mask.hidden {
+  display: none;
+}
+.pywb-loading-spinner-mask {
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 100vw;
+  height: 100vh;
+  z-index: 900;
+
+  display: flex;
+  justify-content: center;
+  align-items: center;
+
+  background-color: rgba(255,255,255, .85);
+
+  opacity: 0;
+  transition: opacity 500ms ease-in;
+}
+
+.pywb-loading-spinner {
+  position: relative;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  width: 200px;
+  height: 200px;
+}
+[data-loading-spinner^=circle] {
+  position: absolute;
+  border: 3px solid #444444;/* #0D4B9F; */
+  width: 70%;
+  height: 70%;
+  margin: 0;
+  border-radius: 50%;
+  border-left-color: transparent;
+  border-right-color: transparent;
+  animation: rotate 2s cubic-bezier(0.26, 1.36, 0.74, -0.29) infinite;
+}
+[data-loading-spinner=circle2] {
+  border: 3px solid #ddd;/* #E0EDFF; */
+  width: 80%;
+  height: 80%;
+  border-left-color: transparent;
+  border-right-color: transparent;
+  animation: rotate2 2s cubic-bezier(0.26, 1.36, 0.74, -0.29) infinite;
+}
+[data-loading-spinner=circle3] {
+  border: 3px solid #656565;/* #005CDC; */
+  width: 90%;
+  height: 90%;
+  border-left-color: transparent;
+  border-right-color: transparent;
+  animation: rotate 2s cubic-bezier(0.26, 1.36, 0.74, -0.29) infinite;
+}
+[data-loading-spinner=circle4] {
+  border: 3px solid #aaa; /* #94B6E5; */
+  width: 100%;
+  height: 100%;
+  border-left-color: transparent;
+  border-right-color: transparent;
+  animation: rotate2 2s cubic-bezier(0.26, 1.36, 0.74, -0.29) infinite;
+}
+@keyframes rotate {
+  0% {
+    transform: rotateZ(-360deg)
+  }
+  100% {
+    transform: rotateZ(0deg)
+  }
+}
+@keyframes rotate2 {
+  0% {
+    transform: rotateZ(360deg)
+  }
+  100% {
+    transform: rotateZ(0deg)
+  }
+}
+[data-loading-spinner=text] {
+  font-size: 15px;
+}
+</style>

pywb/vueui/src/components/Timeline.vue

@@ -19,14 +19,14 @@
         <div class="scroll" ref="periodScroll" :class="{highlight: highlight}">
             <div class="periods" ref="periods">
                 <div v-for="subPeriod in period.children"
-                     :key="subPeriod.id"
+                     :key="subPeriod.fullId"
                      class="period"
                      :class="{empty: !subPeriod.snapshotCount, highlight: highlightPeriod === subPeriod, 'last-level': !canZoom, 'contains-current-snapshot': containsCurrentSnapshot(subPeriod) }"
                 >
                     <div class="histo">
                         <div class="line"
                              v-for="histoPeriod in subPeriod.children"
-                             :key="histoPeriod.id"
+                             :key="histoPeriod.fullId"
                              :style="{height: getHistoLineHeight(histoPeriod.snapshotCount)}"
                              :class="{'has-single-snapshot': histoPeriod.snapshotCount === 1, 'contains-current-snapshot': containsCurrentSnapshot(histoPeriod)}"
                              @click="changePeriod(histoPeriod, $event)"

pywb/vueui/src/index.js

@@ -7,12 +7,14 @@ import Vue from "vue/dist/vue.esm.browser";
 
 // ===========================================================================
 export function main(staticPrefix, url, prefix, timestamp, logoUrl) {
-  new CDXLoader(staticPrefix, url, prefix, timestamp, logoUrl);
+  const loadingSpinner = new LoadingSpinner(); // bootstrap loading-spinner EARLY ON
+  new CDXLoader(staticPrefix, url, prefix, timestamp, logoUrl, loadingSpinner);
 }
 
 // ===========================================================================
 class CDXLoader {
-  constructor(staticPrefix, url, prefix, timestamp, logoUrl) {
+  constructor(staticPrefix, url, prefix, timestamp, logoUrl, loadingSpinner) {
+    this.loadingSpinner = loadingSpinner;
     this.opts = {};
     this.prefix = prefix;
     this.staticPrefix = staticPrefix;
@@ -43,23 +45,17 @@ class CDXLoader {
       throw new Error("No query URL specified");
     }
 
-    this.opts.initialView = {url, timestamp};
+    const logoImg = this.staticPrefix + "/" + (this.logoUrl ? this.logoUrl : "pywb-logo-sm.png");
-
-    this.opts.logoImg = this.staticPrefix + "/" + (this.logoUrl ? this.logoUrl : "pywb-logo-sm.png");
 
+    this.app = this.initApp({logoImg, url});
     this.loadCDX(queryURL).then((cdxList) => {
-      this.app = this.initApp(cdxList, this.opts, (snapshot) => this.loadSnapshot(snapshot));
+      this.setAppData(cdxList, timestamp ? {url, timestamp}:null);
     });
   }
 
-  initApp(data, config = {}, loadCallback = null) {
+  initApp(config = {}) {
     const app = new Vue(appData);
 
-    const pywbData = new PywbData(data);
-
-    app.$set(app, "snapshots", pywbData.snapshots);
-    app.$set(app, "currentPeriod", pywbData.timeline);
-
     app.$set(app, "config", {...app.config, ...config, prefix: this.prefix});
 
     app.$mount("#app");
@@ -75,9 +71,9 @@ class CDXLoader {
     //     };
     //   }
     // });
-    if (loadCallback) {
+
-      app.$on("show-snapshot", loadCallback);
+    app.$on("show-snapshot", this.loadSnapshot.bind(this));
-    }
+    app.$on("data-set-and-render-completed", () => this.loadingSpinner.setOff()); // only turn off loading-spinner AFTER app has told us it is DONE DONE
 
     return app;
   }
@@ -90,16 +86,19 @@ class CDXLoader {
 
     const cdxList = await this.loadCDX(queryURL);
 
-    const pywbData = new PywbData(cdxList);
+    this.setAppData(cdxList, {url, timestamp});
+  }
 
-    const app = this.app;
+  setAppData(cdxList, snapshot=null) {
-    app.$set(app, "snapshots", pywbData.snapshots);
+    this.app.setData(new PywbData(cdxList));
-    app.$set(app, "currentPeriod", pywbData.timeline);
 
-    app.setSnapshot({url, timestamp});
+    if (snapshot) {
+      this.app.setSnapshot(snapshot);
+    }
   }
 
   async loadCDX(queryURL) {
+    this.loadingSpinner.setOn(); // start loading-spinner when CDX loading begins
     const queryWorker = new Worker(this.staticPrefix + "/queryWorker.js");
 
     const p = new Promise((resolve) => {

pywb/vueui/src/model.js

@@ -8,24 +8,37 @@ export function PywbData(rawSnaps) {
   rawSnaps.forEach((rawSnap, i) => {
     const snap = new PywbSnapshot(rawSnap, i);
     let year, month, day, hour, single;
+
+    // Year Period
+    //  if year did not exist in "all time", create it
     if (!(year = allTimePeriod.getChildById(snap.year))) {
-      if (lastYear) lastYear.checkIfSingleSnapshotOnly();
+      if (lastYear) lastYear.checkIfSingleSnapshotOnly(); // check last year for containing single snapshot
       lastYear = year = new PywbPeriod({type: PywbPeriod.Type.year, id: snap.year});
       allTimePeriod.addChild(year);
     }
+
+    // Month Period
+    //  if month did not exist in "year" period, create it
     if (!(month = year.getChildById(snap.month))) {
-      if (lastMonth) lastMonth.checkIfSingleSnapshotOnly();
+      if (lastMonth) lastMonth.checkIfSingleSnapshotOnly();// check last month for containing single snapshot
       lastMonth = month = new PywbPeriod({type: PywbPeriod.Type.month, id: snap.month});
       year.addChild(month);
     }
+
+    // Day Period
+    //  if day did not exist in "month" period, create it
     if (!(day = month.getChildById(snap.day))) {
-      if (lastDay) lastDay.checkIfSingleSnapshotOnly();
+      if (lastDay) lastDay.checkIfSingleSnapshotOnly(); // check last day for containing single snapshot
       lastDay = day = new PywbPeriod({type: PywbPeriod.Type.day, id: snap.day});
       month.addChild(day);
     }
+
+    // Hour Period
     const hourValue = Math.ceil((snap.hour + .0001) / (24/8)); // divide day in 4 six-hour periods (aka quarters)
+
+    //  if hour did not exist in "day" period, create it
     if (!(hour = day.getChildById(hourValue))) {
-      if (lastHour) lastHour.checkIfSingleSnapshotOnly();
+      if (lastHour) lastHour.checkIfSingleSnapshotOnly(); // check last hour for containing single snapshot
       lastHour = hour = new PywbPeriod({type: PywbPeriod.Type.hour, id: hourValue});
       day.addChild(hour);
     }
@@ -33,14 +46,29 @@ export function PywbData(rawSnaps) {
       single = new PywbPeriod({type: PywbPeriod.Type.snapshot, id: snap.id});
       hour.addChild(single);
     }
-    single.setSnapshot(snap);
-    if (lastSingle) {
-      lastSingle.setNextSnapshotPeriod(single);
-      single.setPreviousSnapshotPeriod(lastSingle);
-    }
-    lastSingle = single;
 
-    snapshots.push(snap);
+    // De-duplicate single snapshots (sometimes there are multiple snapshots
+    //   of the same timestamp with different HTTP status; ignore all
+    //   duplicates and take the first entry regardless of status)
+    if (!lastSingle || lastSingle.id !== single.id) {
+      single.setSnapshot(snap);
+      if (lastSingle) {
+        lastSingle.setNextSnapshotPeriod(single);
+        single.setPreviousSnapshotPeriod(lastSingle);
+      }
+      lastSingle = single;
+
+      snapshots.push(snap);
+    }
+
+    // At end of snapshot loop, check period of each type: year/month/day/hour
+    //  as all snapshots are now added to the period hierarchy
+    if (i === rawSnaps.length - 1) { // is last snapshot
+      year.checkIfSingleSnapshotOnly();
+      month.checkIfSingleSnapshotOnly();
+      day.checkIfSingleSnapshotOnly();
+      hour.checkIfSingleSnapshotOnly();
+    }
   });
 
   this.timeline = allTimePeriod;
@@ -112,7 +140,7 @@ export class PywbSnapshot {
 export function PywbPeriod(init) {
   this.type = init.type;
   this.id = init.id;
-  this.fullId = ''; // full-id property that include string id of parents and self with a delimitor
+  this.fullId = Math.floor(1000*1000+Math.random()*9*1000*1000).toString(16); // full-id property that include string id of parents and self with a delimitor
 
   this.childrenIds = {}; // allow for query by ID
   this.children = []; // allow for sequentiality / order