From 6c37677c2a23f2bc3cc2cd9deeb294510de03681 Mon Sep 17 00:00:00 2001
From: tiddlygit-test <linonetwo012@gmail.com>
Date: Fri, 16 Oct 2020 22:27:28 +0800
Subject: [PATCH] feat: add service-worker plugin

---
 .../service-worker/load-service-worker.html   | 165 ++++++++++++++++++
 .../load-service-worker.html.meta             |   4 +
 .../linonetwo/service-worker/plugin.info      |   9 +
 .../linonetwo/service-worker/readme.tid       |  51 ++++++
 template/wiki/public/service-worker.js        |   2 +-
 template/wiki/tiddlywiki.info                 |   1 +
 6 files changed, 231 insertions(+), 1 deletion(-)
 create mode 100644 template/wiki/plugins/linonetwo/service-worker/load-service-worker.html
 create mode 100644 template/wiki/plugins/linonetwo/service-worker/load-service-worker.html.meta
 create mode 100644 template/wiki/plugins/linonetwo/service-worker/plugin.info
 create mode 100755 template/wiki/plugins/linonetwo/service-worker/readme.tid

diff --git a/template/wiki/plugins/linonetwo/service-worker/load-service-worker.html b/template/wiki/plugins/linonetwo/service-worker/load-service-worker.html
new file mode 100644
index 00000000..e89fb293
--- /dev/null
+++ b/template/wiki/plugins/linonetwo/service-worker/load-service-worker.html
@@ -0,0 +1,165 @@
+<link rel="manifest" href="manifest.webmanifest" />
+
+<script type="text/javascript">
+  const isLocalhost = Boolean(
+    window.location.hostname === 'localhost' ||
+      // [::1] is the IPv6 localhost address.
+      window.location.hostname === '[::1]' ||
+      // 127.0.0.0/8 are considered localhost for IPv4.
+      window.location.hostname.match(/^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/)
+  );
+
+  function register(config) {
+    if ('serviceWorker' in navigator) {
+      window.addEventListener('load', () => {
+        const swUrl = 'service-worker.js';
+
+        if (isLocalhost) {
+          // This is running on localhost. Let's do additional checks to see if a service worker still exists or not.
+          checkValidServiceWorker(swUrl, config);
+
+          // Add some additional logging to localhost, pointing developers to the
+          // service worker/PWA documentation.
+          navigator.serviceWorker.ready.then(() => {
+            console.log(
+              'This web app is being served cache-first by a service ' +
+                'worker. To learn more, visit https://bit.ly/CRA-PWA'
+            );
+          });
+        } else {
+          // Is not localhost. Just register service worker
+          console.log('Register service worker');
+          registerValidSW(swUrl, config);
+        }
+      });
+    }
+  }
+
+  function registerValidSW(swUrl, config) {
+    navigator.serviceWorker
+      .register(swUrl)
+      .then((registration) => {
+        console.log('Service worker is speeding up this wiki.')
+        registration.onupdatefound = () => {
+          console.log('New content is found, prepare to fetch', registration);
+          const installingWorker = registration.installing;
+          if (installingWorker == null) {
+            return;
+          }
+          installingWorker.onstatechange = () => {
+            if (installingWorker.state === 'installed') {
+              if (navigator.serviceWorker.controller) {
+                // At this point, the updated precached content has been fetched,
+                // but normally the previous service worker will still serve the older
+                // content until all client tabs are closed.
+                // but we have set self.skipWaiting() in the service worker, so just inform user to reload the page to take effect.
+                console.log('New content is available and will be used when after refresh or refetch');
+
+                // Execute callback, prepare an info to inform user refresh here.
+                if (config && config.onUpdate) {
+                  config.onUpdate(registration);
+                }
+              } else {
+                // At this point, everything has been precached.
+                // It's the perfect time to display a
+                // "Content is cached for offline use." message.
+                console.log('Content is cached for offline use.');
+
+                // Execute callback
+                if (config && config.onSuccess) {
+                  config.onSuccess(registration);
+                }
+              }
+            }
+          };
+        };
+      })
+      .catch((error) => {
+        console.error('Error during service worker registration:', error);
+      });
+  }
+
+  function checkValidServiceWorker(swUrl, config) {
+    // Check if the service worker can be found. If it can't reload the page.
+    fetch(swUrl, {
+      headers: { 'Service-Worker': 'script' },
+    })
+      .then((response) => {
+        // Ensure service worker exists, and that we really are getting a JS file.
+        const contentType = response.headers.get('content-type');
+        if (response.status === 404 || (contentType != null && contentType.indexOf('javascript') === -1)) {
+          // No service worker found. Probably a different app. Reload the page.
+          navigator.serviceWorker.ready.then((registration) => {
+            registration.unregister().then(() => {
+              window.location.reload();
+            });
+          });
+        } else {
+          // Service worker found. Proceed as normal.
+          registerValidSW(swUrl, config);
+        }
+      })
+      .catch(() => {
+        console.log('No internet connection found. App is running in offline mode.');
+      });
+  }
+
+  function unregister() {
+    if ('serviceWorker' in navigator) {
+      navigator.serviceWorker.ready
+        .then((registration) => {
+          registration.unregister();
+        })
+        .catch((error) => {
+          console.error(error.message);
+        });
+    }
+  }
+
+  function informUserToReloadToGetLatestContent() {
+    const body = document.querySelector('body');
+    const infoElement = document.createElement('div');
+    infoElement.className = 'ask-user-reload';
+    infoElement.innerHTML =
+      navigator.language === 'zh-CN'
+        ? '新内容已准备好，点击此处刷新页面更新到新版。'
+        : 'New content available. Click here to Refresh this page to get update.';
+    infoElement.onclick = () => location.reload();
+    infoElement.onKeyDown = () => location.reload();
+    infoElement.tabindex = 1;
+    infoElement.role = 'button';
+
+    const closeElement = document.createElement('div');
+    closeElement.className = 'ask-user-reload-close';
+    closeElement.innerHTML = navigator.language === 'zh-CN' ? '关闭 ×' : 'close ×';
+    closeElement.onclick = () => body.removeChild(infoElement);
+    closeElement.onKeyDown = () => body.removeChild(infoElement);
+    closeElement.tabindex = 0;
+    closeElement.role = 'button';
+    infoElement.appendChild(closeElement);
+
+    body.appendChild(infoElement);
+  }
+
+  register({ onUpdate: informUserToReloadToGetLatestContent });
+</script>
+
+<style>
+  .ask-user-reload {
+    padding: 25px;
+    position: absolute;
+    bottom: 10px;
+    right: 5px;
+    background: wheat;
+    z-index: 9999;
+    cursor: alias;
+  }
+  .ask-user-reload-close {
+    padding: 5px;
+    position: absolute;
+    top: 0;
+    right: 0;
+    cursor: pointer;
+    font-weight: bold;
+  }
+</style>
diff --git a/template/wiki/plugins/linonetwo/service-worker/load-service-worker.html.meta b/template/wiki/plugins/linonetwo/service-worker/load-service-worker.html.meta
new file mode 100644
index 00000000..651f5b1e
--- /dev/null
+++ b/template/wiki/plugins/linonetwo/service-worker/load-service-worker.html.meta
@@ -0,0 +1,4 @@
+creator: LinOnetwo
+tags: $:/tags/RawMarkup
+title: $:/plugins/linonetwo/service-worker/load-service-worker.html
+type: text/html
diff --git a/template/wiki/plugins/linonetwo/service-worker/plugin.info b/template/wiki/plugins/linonetwo/service-worker/plugin.info
new file mode 100644
index 00000000..dbb61505
--- /dev/null
+++ b/template/wiki/plugins/linonetwo/service-worker/plugin.info
@@ -0,0 +1,9 @@
+{
+  "title": "$:/plugins/linonetwo/service-worker",
+  "description": "Use service worker to cache content, make it works even offline, and can be add to the desktop as an App.",
+  "author": "LinOnetwo",
+  "core-version": ">=5.1.22",
+  "plugin-type": "plugin",
+  "version": "0.0.1",
+  "list": "readme"
+}
\ No newline at end of file
diff --git a/template/wiki/plugins/linonetwo/service-worker/readme.tid b/template/wiki/plugins/linonetwo/service-worker/readme.tid
new file mode 100755
index 00000000..d559d547
--- /dev/null
+++ b/template/wiki/plugins/linonetwo/service-worker/readme.tid
@@ -0,0 +1,51 @@
+title: $:/plugins/linonetwo/service-worker/readme
+created: 20200414135748497
+modified: 20200602062349232
+creator: LinOnetwo
+type: text/vnd.tiddlywiki
+
+!! Usage
+
+After install, you have to publish your wiki as a HTTPS website to make it work.
+
+!!! Make sure to include all necessary step in the build process
+
+Add following files to your `/public` folder after build, you can use a script to copy them to the build folder after the wiki build process:
+
+1. Add a `manifest.webmanifest` like:
+
+```json
+{
+  "background_color": "white",
+  "theme_color": "white",
+  "description": "Meme of LinOnetwo 林一二的模因和想法 - TiddlyWiki 非线性的知识库和博客",
+  "display": "standalone",
+  "icons": [
+    {
+      "src": "/TiddlyWikiIconBlack.png",
+      "sizes": "256x256",
+      "type": "image/png"
+    },
+    {
+      "src": "/TiddlyWikiIconWhite.png",
+      "sizes": "144x144",
+      "type": "image/png"
+    }
+  ],
+  "name": "TiddlyWiki",
+  "short_name": "Wiki",
+  "lang": "zh-CN",
+  "start_url": "/",
+  "scope": "/"
+}
+```
+
+Make sure icon size is at least 144x144. And change all necessary fields.
+
+2. Add `service-worker.js`:
+
+See [[https://github.com/linonetwo/Meme-of-LinOnetwo/public/service-worker.js|https://github.com/linonetwo/Meme-of-LinOnetwo/blob/d088f72a2b95ee21b68af1b349d9993a3997bf19/Meme-of-LinOnetwo/public/service-worker.js]] for example.
+
+!!! Config router
+
+Sometimes request from this plugin to your `service-worker.js` will resulted in 404, this is basically because you are not putting `service-worker.js` just besides your `index.html`, or the router config is wrong.
diff --git a/template/wiki/public/service-worker.js b/template/wiki/public/service-worker.js
index 178c028b..72f2d8e9 100644
--- a/template/wiki/public/service-worker.js
+++ b/template/wiki/public/service-worker.js
@@ -1,4 +1,4 @@
-importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.3/workbox-sw.js');
+importScripts('https://storage.googleapis.com/workbox-cdn/releases/5.1.4/workbox-sw.js');
 
 if (workbox) {
   console.log(`Yay! Workbox is loaded 🎉Service Worker is working!`);
diff --git a/template/wiki/tiddlywiki.info b/template/wiki/tiddlywiki.info
index e705f118..d5bc556e 100644
--- a/template/wiki/tiddlywiki.info
+++ b/template/wiki/tiddlywiki.info
@@ -37,6 +37,7 @@
     "felixhayashi/topstoryview",
     "mat/field-value-selector",
     "linonetwo/opened-tiddlers-bar",
+    "linonetwo/service-worker",
     "linonetwo/copy-on-select",
     "linonetwo/source-control-management",
     "linonetwo/prevent-edit"