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<!DOCTYPE html>
<html lang="en">
<head>
<title>Shower Presentation Engine</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="node_modules/@shower/ribbon/styles/styles.css">
<link rel="stylesheet" href="./styles/main.css">
<style>
.shower {
--slide-ratio: calc(16 / 9);
}
</style>
</head>
<body class="shower list">
<header class="caption">
<h1>Shower Presentation Engine</h1>
<p>Yours Truly, Famous Inc.</p>
</header>
<section class="slide" data-name="slide cover">
<img class="cover" src="./images/offline-by-heart.png" alt="Offline by heart">
</section>
<section class="slide" data-name="who-am-i">
<h2>Who am I?</h2>
<div class="who-am-i" data-name="who-am-i">
<img class="who-am-i__image" src="./images/stas-dolgachov.jpg" alt="Speaker image">
<ul class="who-am-i__content">
<li>Stanislav Dolgachov</li>
<li>Software Engineer in EPAM</li>
<li>Play saxophone</li>
</ul>
</div>
</section>
<section class="slide" data-name="what?">
<h2 class="shout">What?</h2>
</section>
<section class="slide black" data-name="Good offline example">
<img class="cover" src="./images/instagram_offline.PNG" alt="Instagram app in offline mode">
</section>
<section class="slide" data-name="why-offline">
<h2 class="shout">Why?</h2>
</section>
<section class="slide">
<h2 class="shout">1. Devices</h2>
</section>
<section class="slide" data-name="iPhone 6">
<img class="cover" src="./images/iphone-6.jpg" alt="Iphone 6 from 2014">
<p class="main-text"><b>2014</b></p>
</section>
<section class="slide" data-name="metro law">
<h2>2. Murphy's law</h2>
<img class="cover" src="./images/there-is-no-internet-connection-prints.webp" alt="No internet connection T-REX">
</section>
<section class="slide black" data-name="I hate white screens">
<h2><div>3. I hate</div><div>white screens</div> </h2>
<img class="cover" src="./images/safari-blank-screen.png" alt="Safari browser with blank screen">
</section>
<section class="slide" data-name="but...">
<h2 class="shout">But...</h2>
</section>
<section class="slide" data-name="Our project">
<h2 class="shout">Our project</h2>
</section>
<section class="slide" data-name="tech specs">
<h2>Tech. specs</h2>
<ul>
<li><h3>Mobile application for iOS</h3></li>
<li><h3>Ionic & Cordova</h3></li>
<li><h3>Angular+</h3></li>
</ul>
</section>
<section class="slide grid black" data-name="Business requirements">
<h2 class="white-text">
<div>Our</div>
<div>app</div>
</h2>
<img class="cover" src="./images/prism-app-2.png" alt="Prism application screenshoot">
</section>
<section class="slide" data-name="Dmytro & Stan">
<img class="cover" src="./images/offline-developers.png" alt="Dmytro and Stan picture before starting the project">
</section>
<section class="slide" data-name="Offline requirements for files">
<h2>Offline requirements for files</h2>
<img class="cover" src="./images/offline-requirements.svg" alt="Save Preview Delete">
</section>
<section class="slide" data-name="what could go wrong">
<h2>What could possible go wrong?</h2>
<img class="place" src="./images/what-could-possibly-go-wrong-gif.gif" alt="What could possible go wrong?">
</section>
<section class="slide" data-name="Life finds a way.">
<h2 class="next">Life finds a way.</h2>
<img class="place" src="./images/life-finds-the-way.gif" alt="Life finds a way.">
</section>
<section class="slide">
<h2>The beginning</h2>
<img class="cover" src="./images/meeting.gif" alt="People on the meeting">
</section>
<section class="slide" data-name="File + Metadata">
<img class="place" src="./images/File%20and%20metadata.svg" alt="File + Metadata diagram">
</section>
<section class="slide grid" data-name="File representation">
<h2>1. File</h2>
<img class="cover" src="./images/box.png" alt="Box com logo">
</section>
<section class="slide" data-name="Dmytro's Golysh pull request">
<img class="cover" src="./images/offline-pull-request.png" alt="Dmytro's Golysh pull request to Box content preview">
</section>
<section class="slide">
<h2>Cordova plugin for files</h2>
<img src="./images/cordova-plugin.png" alt="Cordova plugin">
</section>
<section class="slide" data-name="File">
<h2 class="shout">File ✅</h2>
</section>
<section class="slide" data-name="metadata">
<h2 class="shout">2. Metadata</h2>
</section>
<section class="slide" data-name="Cordova plugin for SQLite DB">
<h2>Cordova plugin for SQLite DB</h2>
<img src="./images/cordova-plugin.png" alt="Cordova plugin">
</section>
<section class="slide grid black" data-name="Prism application">
<h2 class="white-text">
<div>Our</div>
<div>app</div>
</h2>
<img class="cover" src="./images/prism-app-2.png" alt="Prism application screenshoot">
</section>
<section class="slide" data-name="Cordova plugin for SQLite DB">
<h2>💡 Progressive Web Applications (Approach)</h2>
<img class="place" src="./images/pwa.png" alt="pwa">
</section>
<section class="slide" data-name="service worker">
<img class="cover" src="./images/service-worker.jpeg" alt="service worker graph">
</section>
<section class="slide" data-name="Store responses"
style="display: flex; align-items: center;">
<div class="columns two">
<div>
<h2>Url: <mark>/folders</mark> <mark class="mark-important next">KEY</mark></h2>
</div>
<div>
<h2>Response: <mark class="mark-important next">VALUE</mark></h2>
<pre class="main-text">
[<img width="50" height="50" src="./images/dog.png" alt="dog">, <img width="50" height="50" src="./images/dog.png" alt="dog">, <img width="50" height="50" src="./images/dog.png" alt="dog">]
</pre>
</div>
</div>
</section>
<section class="slide" data-name="Responses storage diagram">
<img style="height: 90%;" class="shout" src="./images/response-store.svg" alt="Responses storage diagram">
</section>
<section class="slide" data-name="Changes">
<div class="next">
<h3>Before</h3>
<pre>
<code><mark class="important">this.http.get(...)</mark></code>
</pre>
</div>
<div class="next">
<h3>After</h3>
<pre>
<code><mark>this.pcsHttp.get(...)</mark></code>
</pre>
</div>
<img class="place right" src="./images/rocky.gif" alt="Rocky Balboa training session">
</section>
<section class="slide" data-name="First iteration success">
<h2>Success!</h2>
<img class="cover" src="./images/stark-bow.gif" alt="Tony Stark stays on stage">
</section>
<section class="slide" data-name="How long?">
<h2 class="shout">How long?</h2>
</section>
<section class="slide" data-name="4 days">
<h2 class="shout">~4 days</h2>
</section>
<section class="slide" data-name="Genius idea retro">
<h2>Retro</h2>
<div class="columns two">
<div>
<h3><span class="success-highlight">Advantages</span></h3>
<ol>
<li class="next">Components "don't know" anything about offline</li>
</ol>
</div>
<div>
<h3 class="alert-highlight">Disadvantages</h3>
<ol>
<li class="next">API changes very often</li>
<li class="next">Totally unclear what calls you need to save</li>
</ol>
</div>
</div>
</section>
<section class="slide" data-name="iteration number two">
<h2 class="shout">Iteration #2</h2>
</section>
<section class="slide" data-name="1. Several base stores">
<h2 class="shout">1. Refactor data store</h2>
</section>
<section class="slide" data-name="Responses storage diagram duplicate">
<img style="height: 90%;" class="cover" src="./images/response-store.svg" alt="Responses storage diagram">
</section>
<section class="slide" data-name="Several stores diagram">
<img class="cover" src="./images/stores.svg" alt="Several stores diagram">
</section>
<section class="slide" data-name="Collections">
<h2>Companies store example</h2>
<table class="striped">
<tr>
<th>Id</th>
<th>Name</th>
<th>firmParticipantId</th>
<th>newDocumentsCount</th>
</tr>
<tr scope="row">
<td>777</td>
<th>ACME</th>
<td>888</td>
<td>10</td>
</tr>
<tr scope="row">
<td>968</td>
<th>ZAZ</th>
<td>963</td>
<td>0</td>
</tr>
<tr scope="row">
<td>111</td>
<th>KIA</th>
<td>222</td>
<td>22</td>
</tr>
<tr scope="row">
<td>7555</td>
<th>Jeep</th>
<td>1213</td>
<td>11</td>
</tr>
<tr scope="row">
<td>14141</td>
<th>Ford Co.</th>
<td>33</td>
<td>1</td>
</tr>
</table>
</section>
<section class="slide" data-name="Obsolete data">
<h2 class="shout">Obsolete data</h2>
</section>
<section class="slide" data-name="Migrations">
<h2>2. Migrations</h2>
<img class="cover" src="./images/migration-dia.svg" alt="Migration scripts diagram">
</section>
<section class="slide" data-name="Synchronization">
<h2>3. Synchronization</h2>
<h3 class="next">NgRx effects</h3>
<img class="cover next" src="./images/effects.svg" alt="Effects for synchronization">
</section>
<section class="slide" data-name="Synchronization2">
<h2>3. Synchronization</h2>
<pre>
<code><mark>@Effect({ dispatch: false })</mark></code>
<code>public syncData: Observable<Action> = this.actions$.pipe(</code>
<code> <mark>ofType('SYNC_DATA'),</mark></code>
<code> tap((action) => {</code>
<code> <mark class="important">this.dataSyncService.sync(action.payload);</mark></code>
<code> })</code>
<code>);</code>
</pre>
</section>
<section class="slide" data-name="Deferred error">
<h2>4. Deferred error logging</h2>
<img class="cover" src="./images/error-handling.svg" alt="error handling">
</section>
<section class="slide" data-name="Tips & tricks">
<h2 class="shout">
Tips & tricks <img width="120" height="120" src="./images/dog.png" alt="dog">
</h2>
</section>
<section class="slide" data-name="Offline is hard">
<h2>1. User's offline data</h2>
<div>
<img src="./images/offline-is-hard.gif" alt="Dog falls down">
</div>
</section>
<section class="slide" data-name="Auth when offline">
<h2>2. Auth when offline</h2>
<div>
<img src="./images/authozitaion.gif" alt="Dog attempt to come in through the glass door">
</div>
</section>
<section class="slide" data-name="Dynamic Cache">
<h2>3. Dynamic Cache</h2>
<div>
<img src="./images/dynamic-cache.gif" alt="Three dogs and one on the hoover">
</div>
</section>
<section class="slide" data-name="one-more-thing">
<img style="height: 90%;" class="cover" src="./images/one_more_thing.png" alt="One more thing">
</section>
<section class="slide" data-name="browser-implementation">
<h2 class="shout">Offline in browsers?</h2>
</section>
<section class="slide" data-name="Good artists copy, Great artists steal">
<blockquote>
<h2>Good artists copy, Great artists steal</h2>
</blockquote>
<img src="./images/pozner.jpg" alt="Pozner">
</section>
<section class="slide black" data-name="google-docs">
<img src="./images/google-docs.png"
class="cover"
alt="google docs">
</section>
<section class="slide black" data-name="google-docs-extension">
<img src="./images/google-docs-extension.png"
alt="google docs offline extension">
</section>
<section class="slide" data-name="docs manifest">
<h2>manifest.json</h2>
<pre>
<code><mark>"content_capabilities"</mark>: {</code>
<code> ...</code>
<code> "permissions": [ ..., <mark>"unlimitedStorage"</mark>]</code>
<code>},</code>
<code>...</code>
<code>"permissions": [ ..., <mark>"unlimitedStorage"</mark>],</code>
<code>...</code>
</pre>
</section>
<section class="slide" data-name="conten_capabilities">
<h3>"The <span class="mark-important">content_capabilities</span> manifest entry allows an extension to grant certain <mark>additional capabilities to web contents whose locations match a given set of URL patterns.</mark>",</h3>
<pre>
<code>"permissions": [ ..., <mark>"unlimitedStorage"</mark>]</code>
</pre>
</section>
<section class="slide" data-name="browser-case-1">
<h2>Case #1 (Google Docs)</h2>
<ol>
<li><h3>Own browser</h3></li>
<li><h3>IndexDB</h3></li>
<li><h3>Browser extension for unlimited storage</h3></li>
</ol>
</section>
<section class="slide" data-name="the present">
<h2>2k19</h2>
<img class="cover" src="./images/pwa.png" alt="PWA">
</section>
<section class="slide" data-name="browser-case-1">
<h2>Case #2 (PWA)</h2>
<ol>
<li><h3>Cache static resources via Service Worker</h3></li>
<li><h3>Store metadata in IndexDB</h3></li>
<li><h3>Cache binary via Cache API in Main Script</h3></li>
</ol>
</section>
<section class="slide black">
<img class="cover" src="./images/service-worker-file-cache.png" alt="service worker file cache example">
</section>
<section class="slide black" data-name="the future">
<h2>
<a target="_blank" href="https://developers.google.com/web/updates/2019/08/native-file-system">
Native File System API
</a>
</h2>
<img src="./images/matrix.gif" alt="Matrix">
</section>
<section class="slide black" data-name="offline text editor">
<img class="cover" src="./images/offline-text-editor.png" alt="offline text editor">
</section>
<section class="slide" data-name="the future">
<h2>Case #3 (The future)</h2>
<ol>
<li><h3>Available by flag in Chrome 77</h3></li>
<li><h3>Should begin an origin trial in Chrome 78 (stable in October)</h3></li>
</ol>
</section>
<section class="slide" data-name="Q&A">
<h2 class="shout">Q&A</h2>
</section>
<section class="slide" data-name="links">
<h2>Links</h2>
<ol>
<li><a target="_blank" href="http://apandichi.github.io/database-migrations-in-cordova/">Database migrations in Cordova</a></li>
<li><a target="_blank" href="https://blog.bradleygore.com/2015/09/25/cordova-sqlite-migrations/">Cordova Sqlite Migrations</a></li>
<li><a target="_blank" href="https://habr.com/en/post/439238/">PWA in Google Store RUS</a></li>
<li><a target="_blank" href="https://medium.com/@firt/google-play-store-now-open-for-progressive-web-apps-ec6f3c6ff3cc">PWA in Google Store EN</a></li>
<li><a target="_blank" href="https://m.oursky.com/why-every-app-should-go-offline-first-53d4570963bf">Why every app should go offline-first</a></li>
<li><a target="_blank" href="https://m.oursky.com/why-every-app-should-go-offline-first-53d4570963bf">Why every app should go offline-first</a></li>
<li><a target="_blank" href="https://github.com/stas-dolgachov/simple-file-cache">Cache binary via Cache API example</a></li>
<li><a target="_blank" href="https://developers.google.com/web/updates/2019/08/native-file-system">Native File System API</a></li>
</ol>
</section>
<footer class="badge">
<a href="https://github.com/shower/shower">Fork me on GitHub</a>
</footer>
<div class="progress"></div>
<script src="node_modules/shower-core/shower.min.js"></script>
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