add svelte app.

webapp/.gitignore

@@ -0,0 +1,5 @@
+.DS_Store
+/node_modules/
+/src/node_modules/@sapper/
+yarn-error.log
+/__sapper__/

webapp/README.md

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+# sapper-template
+
+The default template for setting up a [Sapper](https://github.com/sveltejs/sapper) project. Can use either Rollup or webpack as bundler.
+
+
+## Getting started
+
+
+### Using `degit`
+
+To create a new Sapper project based on Rollup locally, run
+
+```bash
+npx degit "sveltejs/sapper-template#rollup" my-app
+```
+
+For a webpack-based project, instead run
+
+```bash
+npx degit "sveltejs/sapper-template#webpack" my-app
+```
+
+[`degit`](https://github.com/Rich-Harris/degit) is a scaffolding tool that lets you create a directory from a branch in a repository.
+
+Replace `my-app` with the path where you wish to create the project.
+
+
+### Using GitHub templates
+
+Alternatively, you can create the new project as a GitHub repository using GitHub's template feature.
+
+Go to either [sapper-template-rollup](https://github.com/sveltejs/sapper-template-rollup) or [sapper-template-webpack](https://github.com/sveltejs/sapper-template-webpack) and click on "Use this template" to create a new project repository initialized by the template.
+
+
+### Running the project
+
+Once you have created the project, install dependencies and run the project in development mode:
+
+```bash
+cd my-app
+npm install # or yarn
+npm run dev
+```
+
+This will start the development server on [localhost:3000](http://localhost:3000). Open it and click around.
+
+You now have a fully functional Sapper project! To get started developing, consult [sapper.svelte.dev](https://sapper.svelte.dev).
+
+### Using TypeScript
+
+By default, the template uses plain JavaScript. If you wish to use TypeScript instead, you need some changes to the project:
+
+ * Add `typescript` as well as typings as dependences in `package.json`
+ * Configure the bundler to use [`svelte-preprocess`](https://github.com/sveltejs/svelte-preprocess) and transpile the TypeScript code.
+ * Add a `tsconfig.json` file
+ * Update the project code to TypeScript
+
+The template comes with a script that will perform these changes for you by running
+
+```bash
+node scripts/setupTypeScript.js
+```
+
+`@sapper` dependencies are resolved through `src/node_modules/@sapper`, which is created during the build. You therefore need to run or build the project once to avoid warnings about missing dependencies.
+
+The script does not support webpack at the moment.
+
+## Directory structure
+
+Sapper expects to find two directories in the root of your project —  `src` and `static`.
+
+
+### src
+
+The [src](src) directory contains the entry points for your app — `client.js`, `server.js` and (optionally) a `service-worker.js` — along with a `template.html` file and a `routes` directory.
+
+
+#### src/routes
+
+This is the heart of your Sapper app. There are two kinds of routes — *pages*, and *server routes*.
+
+**Pages** are Svelte components written in `.svelte` files. When a user first visits the application, they will be served a server-rendered version of the route in question, plus some JavaScript that 'hydrates' the page and initialises a client-side router. From that point forward, navigating to other pages is handled entirely on the client for a fast, app-like feel. (Sapper will preload and cache the code for these subsequent pages, so that navigation is instantaneous.)
+
+**Server routes** are modules written in `.js` files, that export functions corresponding to HTTP methods. Each function receives Express `request` and `response` objects as arguments, plus a `next` function. This is useful for creating a JSON API, for example.
+
+There are three simple rules for naming the files that define your routes:
+
+* A file called `src/routes/about.svelte` corresponds to the `/about` route. A file called `src/routes/blog/[slug].svelte` corresponds to the `/blog/:slug` route, in which case `params.slug` is available to the route
+* The file `src/routes/index.svelte` (or `src/routes/index.js`) corresponds to the root of your app. `src/routes/about/index.svelte` is treated the same as `src/routes/about.svelte`.
+* Files and directories with a leading underscore do *not* create routes. This allows you to colocate helper modules and components with the routes that depend on them — for example you could have a file called `src/routes/_helpers/datetime.js` and it would *not* create a `/_helpers/datetime` route.
+
+
+#### src/node_modules/images
+
+Images added to `src/node_modules/images` can be imported into your code using `import 'images/<filename>'`. They will be given a dynamically generated filename containing a hash, allowing for efficient caching and serving the images on a CDN.
+
+See [`index.svelte`](src/routes/index.svelte) for an example.
+
+
+#### src/node_modules/@sapper
+
+This directory is managed by Sapper and generated when building. It contains all the code you import from `@sapper` modules.
+
+
+### static
+
+The [static](static) directory contains static assets that should be served publicly. Files in this directory will be available directly under the root URL, e.g. an `image.jpg` will be available as `/image.jpg`.
+
+The default [service-worker.js](src/service-worker.js) will preload and cache these files, by retrieving a list of `files` from the generated manifest:
+
+```js
+import { files } from '@sapper/service-worker';
+```
+
+If you have static files you do not want to cache, you should exclude them from this list after importing it (and before passing it to `cache.addAll`).
+
+Static files are served using [sirv](https://github.com/lukeed/sirv).
+
+
+## Bundler configuration
+
+Sapper uses Rollup or webpack to provide code-splitting and dynamic imports, as well as compiling your Svelte components. With webpack, it also provides hot module reloading. As long as you don't do anything daft, you can edit the configuration files to add whatever plugins you'd like.
+
+
+## Production mode and deployment
+
+To start a production version of your app, run `npm run build && npm start`. This will disable live reloading, and activate the appropriate bundler plugins.
+
+You can deploy your application to any environment that supports Node 10 or above. As an example, to deploy to [Vercel Now](https://vercel.com) when using `sapper export`, run these commands:
+
+```bash
+npm install -g vercel
+vercel
+```
+
+If your app can't be exported to a static site, you can use the [now-sapper](https://github.com/thgh/now-sapper) builder. You can find instructions on how to do so in its [README](https://github.com/thgh/now-sapper#basic-usage).
+
+
+## Using external components
+
+When using Svelte components installed from npm, such as [@sveltejs/svelte-virtual-list](https://github.com/sveltejs/svelte-virtual-list), Svelte needs the original component source (rather than any precompiled JavaScript that ships with the component). This allows the component to be rendered server-side, and also keeps your client-side app smaller.
+
+Because of that, it's essential that the bundler doesn't treat the package as an *external dependency*. You can either modify the `external` option under `server` in [rollup.config.js](rollup.config.js) or the `externals` option in [webpack.config.js](webpack.config.js), or simply install the package to `devDependencies` rather than `dependencies`, which will cause it to get bundled (and therefore compiled) with your app:
+
+```bash
+npm install -D @sveltejs/svelte-virtual-list
+```
+
+
+## Bugs and feedback
+
+Sapper is in early development, and may have the odd rough edge here and there. Please be vocal over on the [Sapper issue tracker](https://github.com/sveltejs/sapper/issues).

webapp/package.json

@@ -0,0 +1,27 @@
+{
+  "name": "TODO",
+  "description": "TODO",
+  "version": "0.0.1",
+  "scripts": {
+    "dev": "sapper dev",
+    "build": "sapper build",
+    "export": "sapper export",
+    "start": "node __sapper__/build"
+  },
+  "dependencies": {
+    "compression": "^1.7.1",
+    "date-fns": "^2.16.1",
+    "isomorphic-fetch": "^3.0.0",
+    "node-fetch": "^2.6.1",
+    "polka": "next",
+    "sirv": "^1.0.0"
+  },
+  "devDependencies": {
+    "file-loader": "^6.0.0",
+    "sapper": "^0.28.0",
+    "svelte": "^3.17.3",
+    "svelte-loader": "^2.9.0",
+    "webpack": "^4.7.0",
+    "webpack-modules": "^1.0.0"
+  }
+}

webapp/scripts/setupTypeScript.js

@@ -0,0 +1,307 @@
+/**
+ * Run this script to convert the project to TypeScript. This is only guaranteed to work
+ * on the unmodified default template; if you have done code changes you are likely need
+ * to touch up the generated project manually.
+ */
+
+// @ts-check
+const fs = require('fs');
+const path = require('path');
+const { argv } = require('process');
+
+const projectRoot = argv[2] || path.join(__dirname, '..');
+
+const isRollup = fs.existsSync(path.join(projectRoot, "rollup.config.js"));
+
+function warn(message) {
+	console.warn('Warning: ' + message);
+}
+
+function replaceInFile(fileName, replacements) {
+	if (fs.existsSync(fileName)) {
+		let contents = fs.readFileSync(fileName, 'utf8');
+		let hadUpdates = false;
+
+		replacements.forEach(([from, to]) => {
+			const newContents = contents.replace(from, to);
+
+			const isAlreadyApplied = typeof to !== 'string' || contents.includes(to);
+
+			if (newContents !== contents) {
+				contents = newContents;
+				hadUpdates = true;
+			} else if (!isAlreadyApplied) {
+				warn(`Wanted to update "${from}" in ${fileName}, but did not find it.`);
+			}
+		});
+
+		if (hadUpdates) {
+			fs.writeFileSync(fileName, contents);
+		} else {
+			console.log(`${fileName} had already been updated.`);
+		}
+	} else {
+		warn(`Wanted to update ${fileName} but the file did not exist.`);
+	}
+}
+
+function createFile(fileName, contents) {
+	if (fs.existsSync(fileName)) {
+		warn(`Wanted to create ${fileName}, but it already existed. Leaving existing file.`);
+	} else {
+		fs.writeFileSync(fileName, contents);
+	}
+}
+
+function addDepsToPackageJson() {
+	const pkgJSONPath = path.join(projectRoot, 'package.json');
+	const packageJSON = JSON.parse(fs.readFileSync(pkgJSONPath, 'utf8'));
+	packageJSON.devDependencies = Object.assign(packageJSON.devDependencies, {
+		...(isRollup ? { '@rollup/plugin-typescript': '^6.0.0' } : { 'ts-loader': '^8.0.4' }),
+		'@tsconfig/svelte': '^1.0.10',
+		'@types/compression': '^1.7.0',
+		'@types/node': '^14.11.1',
+		'@types/polka': '^0.5.1',
+		'svelte-check': '^1.0.46',
+		'svelte-preprocess': '^4.3.0',
+		tslib: '^2.0.1',
+		typescript: '^4.0.3'
+	});
+
+	// Add script for checking
+	packageJSON.scripts = Object.assign(packageJSON.scripts, {
+		validate: 'svelte-check --ignore src/node_modules/@sapper'
+	});
+
+	// Write the package JSON
+	fs.writeFileSync(pkgJSONPath, JSON.stringify(packageJSON, null, '  '));
+}
+
+function changeJsExtensionToTs(dir) {
+	const elements = fs.readdirSync(dir, { withFileTypes: true });
+
+	for (let i = 0; i < elements.length; i++) {
+		if (elements[i].isDirectory()) {
+			changeJsExtensionToTs(path.join(dir, elements[i].name));
+		} else if (elements[i].name.match(/^[^_]((?!json).)*js$/)) {
+			fs.renameSync(path.join(dir, elements[i].name), path.join(dir, elements[i].name).replace('.js', '.ts'));
+		}
+	}
+}
+
+function updateSingleSvelteFile({ view, vars, contextModule }) {
+	replaceInFile(path.join(projectRoot, 'src', `${view}.svelte`), [
+		[/(?:<script)(( .*?)*?)>/gm, (m, attrs) => `<script${attrs}${!attrs.includes('lang="ts"') ? ' lang="ts"' : ''}>`],
+		...(vars ? vars.map(({ name, type }) => [`export let ${name};`, `export let ${name}: ${type};`]) : []),
+		...(contextModule ? contextModule.map(({ js, ts }) => [js, ts]) : [])
+	]);
+}
+
+// Switch the *.svelte file to use TS
+function updateSvelteFiles() {
+	[
+		{
+			view: 'components/Nav',
+			vars: [{ name: 'segment', type: 'string' }]
+		},
+		{
+			view: 'routes/_layout',
+			vars: [{ name: 'segment', type: 'string' }]
+		},
+		{
+			view: 'routes/_error',
+			vars: [
+				{ name: 'status', type: 'number' },
+				{ name: 'error', type: 'Error' }
+			]
+		},
+		{
+			view: 'routes/blog/index',
+			vars: [{ name: 'posts', type: '{ slug: string; title: string, html: any }[]' }],
+			contextModule: [
+				{
+					js: '.then(r => r.json())',
+					ts: '.then((r: { json: () => any; }) => r.json())'
+				},
+				{
+					js: '.then(posts => {',
+					ts: '.then((posts: { slug: string; title: string, html: any }[]) => {'
+				}
+			]
+		},
+		{
+			view: 'routes/blog/[slug]',
+			vars: [{ name: 'post', type: '{ slug: string; title: string, html: any }' }]
+		}
+	].forEach(updateSingleSvelteFile);
+}
+
+function updateRollupConfig() {
+	// Edit rollup config
+	replaceInFile(path.join(projectRoot, 'rollup.config.js'), [
+		// Edit imports
+		[
+			/'rollup-plugin-terser';\n(?!import sveltePreprocess)/,
+			`'rollup-plugin-terser';
+import sveltePreprocess from 'svelte-preprocess';
+import typescript from '@rollup/plugin-typescript';
+`
+		],
+		// Edit inputs
+		[
+			/(?<!THIS_IS_UNDEFINED[^\n]*\n\s*)onwarn\(warning\);/,
+			`(warning.code === 'THIS_IS_UNDEFINED') ||\n\tonwarn(warning);`
+		],
+		[/input: config.client.input\(\)(?!\.replace)/, `input: config.client.input().replace(/\\.js$/, '.ts')`],
+		[
+			/input: config.server.input\(\)(?!\.replace)/,
+			`input: { server: config.server.input().server.replace(/\\.js$/, ".ts") }`
+		],
+		[
+			/input: config.serviceworker.input\(\)(?!\.replace)/,
+			`input: config.serviceworker.input().replace(/\\.js$/, '.ts')`
+		],
+		// Add preprocess to the svelte config, this is tricky because there's no easy signifier.
+		// Instead we look for 'hydratable: true,'
+		[/hydratable: true(?!,\n\s*preprocess)/g, 'hydratable: true,\n\t\t\t\tpreprocess: sveltePreprocess()'],
+		// Add TypeScript
+		[/commonjs\(\)(?!,\n\s*typescript)/g, 'commonjs(),\n\t\t\ttypescript({ sourceMap: dev })']
+	]);
+}
+
+function updateWebpackConfig() {
+	// Edit webpack config
+	replaceInFile(path.join(projectRoot, 'webpack.config.js'), [
+		// Edit imports
+		[
+			/require\('webpack-modules'\);\n(?!const sveltePreprocess)/,
+			`require('webpack-modules');\nconst sveltePreprocess = require('svelte-preprocess');\n`
+		],
+		// Edit extensions
+		[
+			/\['\.mjs', '\.js', '\.json', '\.svelte', '\.html'\]/,
+			`['.mjs', '.js', '.ts', '.json', '.svelte', '.html']`
+		],
+		// Edit entries
+		[
+			/entry: config\.client\.entry\(\)/,
+			`entry: { main: config.client.entry().main.replace(/\\.js$/, '.ts') }`
+		],
+		[
+			/entry: config\.server\.entry\(\)/,
+			`entry: { server: config.server.entry().server.replace(/\\.js$/, '.ts') }`
+		],
+		[
+			/entry: config\.serviceworker\.entry\(\)/,
+			`entry: { 'service-worker': config.serviceworker.entry()['service-worker'].replace(/\\.js$/, '.ts') }`
+		],
+		// Add preprocess to the svelte config, this is tricky because there's no easy signifier.
+		// Instead we look for 'hydratable: true,'
+		[
+			/hydratable: true(?!,\n\s*preprocess)/g,
+			'hydratable: true,\n\t\t\t\t\t\t\tpreprocess: sveltePreprocess()'
+		],
+		// Add TypeScript rules for client and server
+		[
+			/module: {\n\s*rules: \[\n\s*(?!{\n\s*test: \/\\\.ts\$\/)/g,
+			`module: {\n\t\t\trules: [\n\t\t\t\t{\n\t\t\t\t\ttest: /\\.ts$/,\n\t\t\t\t\tloader: 'ts-loader'\n\t\t\t\t},\n\t\t\t\t`
+		],
+		// Add TypeScript rules for serviceworker
+		[
+			/output: config\.serviceworker\.output\(\),\n\s*(?!module)/,
+			`output: config.serviceworker.output(),\n\t\tmodule: {\n\t\t\trules: [\n\t\t\t\t{\n\t\t\t\t\ttest: /\\.ts$/,\n\t\t\t\t\tloader: 'ts-loader'\n\t\t\t\t}\n\t\t\t]\n\t\t},\n\t\t`
+		],
+		// Edit outputs
+		[
+			/output: config\.serviceworker\.output\(\),\n\s*(?!resolve)/,
+			`output: config.serviceworker.output(),\n\t\tresolve: { extensions: ['.mjs', '.js', '.ts', '.json'] },\n\t\t`
+		]
+	]);
+}
+
+function updateServiceWorker() {
+	replaceInFile(path.join(projectRoot, 'src', 'service-worker.ts'), [
+		[`shell.concat(files);`, `(shell as string[]).concat(files as string[]);`],
+		[`self.skipWaiting();`, `((self as any) as ServiceWorkerGlobalScope).skipWaiting();`],
+		[`self.clients.claim();`, `((self as any) as ServiceWorkerGlobalScope).clients.claim();`],
+		[`fetchAndCache(request)`, `fetchAndCache(request: Request)`],
+		[`self.addEventListener('activate', event =>`, `self.addEventListener('activate', (event: ExtendableEvent) =>`],
+		[`self.addEventListener('install', event =>`, `self.addEventListener('install', (event: ExtendableEvent) =>`],
+		[`addEventListener('fetch', event =>`, `addEventListener('fetch', (event: FetchEvent) =>`],
+	]);
+}
+
+function createTsConfig() {
+	const tsconfig = `{
+		"extends": "@tsconfig/svelte/tsconfig.json",
+		"compilerOptions": {
+			"lib": ["DOM", "ES2017", "WebWorker"]
+		},
+		"include": ["src/**/*", "src/node_modules/**/*"],
+		"exclude": ["node_modules/*", "__sapper__/*", "static/*"]
+	}`;
+
+	createFile(path.join(projectRoot, 'tsconfig.json'), tsconfig);
+}
+
+// Adds the extension recommendation
+function configureVsCode() {
+	const dir = path.join(projectRoot, '.vscode');
+
+	if (!fs.existsSync(dir)) {
+		fs.mkdirSync(dir);
+	}
+
+	createFile(path.join(projectRoot, '.vscode', 'extensions.json'), `{"recommendations": ["svelte.svelte-vscode"]}`);
+}
+
+function deleteThisScript() {
+	fs.unlinkSync(path.join(__filename));
+
+	// Check for Mac's DS_store file, and if it's the only one left remove it
+	const remainingFiles = fs.readdirSync(path.join(__dirname));
+	if (remainingFiles.length === 1 && remainingFiles[0] === '.DS_store') {
+		fs.unlinkSync(path.join(__dirname, '.DS_store'));
+	}
+
+	// Check if the scripts folder is empty
+	if (fs.readdirSync(path.join(__dirname)).length === 0) {
+		// Remove the scripts folder
+		fs.rmdirSync(path.join(__dirname));
+	}
+}
+
+console.log(`Adding TypeScript with ${isRollup ? "Rollup" : "webpack" }...`);
+
+addDepsToPackageJson();
+
+changeJsExtensionToTs(path.join(projectRoot, 'src'));
+
+updateSvelteFiles();
+
+if (isRollup) {
+	updateRollupConfig();
+} else {
+	updateWebpackConfig();
+}
+
+updateServiceWorker();
+
+createTsConfig();
+
+configureVsCode();
+
+// Delete this script, but not during testing
+if (!argv[2]) {
+	deleteThisScript();
+}
+
+console.log('Converted to TypeScript.');
+
+if (fs.existsSync(path.join(projectRoot, 'node_modules'))) {
+	console.log(`
+Next:
+1. run 'npm install' again to install TypeScript dependencies
+2. run 'npm run build' for the @sapper imports in your project to work
+`);
+}

webapp/src/ambient.d.ts

@@ -0,0 +1,39 @@
+/**
+ * These declarations tell TypeScript that we allow import of images, e.g.
+ * ```
+		<script lang='ts'>
+			import successkid from 'images/successkid.jpg';
+		</script>
+
+		<img src="{successkid}">
+	 ```
+ */
+declare module "*.gif" {
+	const value: string;
+	export = value;
+}
+
+declare module "*.jpg" {
+	const value: string;
+	export = value;
+}
+
+declare module "*.jpeg" {
+	const value: string;
+	export = value;
+}
+
+declare module "*.png" {
+	const value: string;
+	export = value;
+}
+
+declare module "*.svg" {
+	const value: string;
+	export = value;
+}
+
+declare module "*.webp" {
+	const value: string;
+	export = value;
+}

webapp/src/client.js

@@ -0,0 +1,5 @@
+import * as sapper from '@sapper/app';
+
+sapper.start({
+	target: document.querySelector('#sapper')
+});

webapp/src/components/Comment.svelte

@@ -0,0 +1,60 @@
+<script>
+  import fromUnixTime from "date-fns/fromUnixTime";
+  import formatDistanceToNow from "date-fns/formatDistanceToNow";
+  export let story;
+  export let comment;
+  export let showComments = true;
+  export let dateString = formatDistanceToNow(fromUnixTime(comment.date), {
+    addSuffix: true,
+  });
+  const author = comment.author.replace(" ", "");
+  export let id = `${author}-${comment.date}`;
+
+  export function toggleComments() {
+    showComments = !showComments;
+  }
+</script>
+
+<style>
+  .comment-author {
+  }
+  .comment-text {
+    padding: 0 0.5rem;
+    color: #333;
+  }
+  .comment-children {
+    margin-left: 1rem;
+    padding-left: 1rem;
+    border-left: solid 1px #000;
+  }
+  .link-button {
+    background: none;
+    border: none;
+    padding: 0 0.1rem;
+    color: inherit;
+    cursor: pointer;
+  }
+</style>
+
+<div class="comment" id="comment-{id}">
+  <div class="comment-author">
+    {comment.author}
+    |
+    <a href="{story.id}#comment-{id}">{dateString}</a>
+    {#if comment.comments.length}
+      <button
+        class="link-button"
+        on:click={toggleComments}>[{showComments ? '-' : '+'}]</button>
+    {/if}
+  </div>
+  <div class="comment-text">
+    {@html comment.text}
+  </div>
+  {#if showComments && comment.comments.length}
+    <div class="comment-children">
+      {#each comment.comments as child}
+        <svelte:self {story} comment={child} />
+      {/each}
+    </div>
+  {/if}
+</div>

webapp/src/components/Nav.svelte

@@ -0,0 +1,59 @@
+<script>
+  export let segment;
+</script>
+
+<style>
+  nav {
+    border-bottom: 1px solid rgba(255, 62, 0, 0.1);
+    font-weight: 300;
+    padding: 0 1em;
+  }
+
+  ul {
+    margin: 0;
+    padding: 0;
+  }
+
+  /* clearfix */
+  ul::after {
+    content: "";
+    display: block;
+    clear: both;
+  }
+
+  li {
+    display: block;
+    float: left;
+  }
+
+  [aria-current] {
+    position: relative;
+    display: inline-block;
+  }
+
+  [aria-current]::after {
+    position: absolute;
+    content: "";
+    width: calc(100% - 1em);
+    height: 2px;
+    background-color: rgb(255, 62, 0);
+    display: block;
+    bottom: -1px;
+  }
+
+  a {
+    text-decoration: none;
+    padding: 1em 0.5em;
+    display: block;
+  }
+</style>
+
+<nav>
+  <ul>
+    <li>
+      <a
+        aria-current={segment === undefined ? 'page' : undefined}
+        href=".">News</a>
+    </li>
+  </ul>
+</nav>

webapp/src/components/StoryInfo.svelte

@@ -0,0 +1,28 @@
+<script>
+  import fromUnixTime from "date-fns/fromUnixTime";
+  import formatDistanceToNow from "date-fns/formatDistanceToNow";
+  export let story;
+
+  export let dateString = formatDistanceToNow(fromUnixTime(story.date), {
+    addSuffix: true,
+  });
+</script>
+
+<style>
+</style>
+
+<time
+  datetime={fromUnixTime(story.date).toISOString()}
+  title={fromUnixTime(story.date)}>{dateString}</time>
+{#if story.author && story.author_link}
+  by
+  <a href={story.author_link}>{story.author}</a>
+{:else if story.author}by {story.author}{/if}
+on
+{story.source}
+{#if story.score}&bull; {story.score} points{/if}
+{#if story.num_comments}
+  &bull;
+  <a rel="prefetch" href="/{story.id}#comments">{story.num_comments}
+    comments</a>
+{/if}

webapp/src/routes/[id].json.js

@@ -0,0 +1,9 @@
+import fetch from 'node-fetch';
+
+export async function get(req, res) {
+	const response = await fetch(`http://localhost:33842/api/${req.params.id}`);
+	res.writeHead(200, {
+		'Content-Type': 'application/json'
+	});
+	res.end(await response.text());
+}

webapp/src/routes/[id].svelte

@@ -0,0 +1,111 @@
+<script context="module">
+  export async function preload({ params }) {
+    // the `slug` parameter is available because
+    // this file is called [slug].svelte
+    const res = await this.fetch(`${params.id}.json`);
+    const data = await res.json();
+
+    if (res.status === 200) {
+      const related = [];
+      const others = data.related.filter(
+        (r) => r.id !== data.story.id && !!r.num_comments
+      );
+      for (const other of others) {
+        const r = await this.fetch(`${other.id}.json`);
+        if (r.ok) {
+          const d = await r.json();
+          related.push(d.story);
+        }
+      }
+      return { story: data.story, related };
+    } else {
+      this.error(res.status, data.message);
+    }
+  }
+</script>
+
+<script>
+  import Comment from "../components/Comment.svelte";
+  import StoryInfo from "../components/StoryInfo.svelte";
+  export let story;
+  export let related;
+
+  let hasComments = story.num_comments || related.length;
+</script>
+
+<style>
+  /*
+		By default, CSS is locally scoped to the component,
+		and any unused styles are dead-code-eliminated.
+		In this page, Svelte can't know which elements are
+		going to appear inside the {{{post.html}}} block,
+		so we have to use the :global(...) modifier to target
+		all elements inside .content
+	*/
+  .content :global(h2) {
+    font-size: 1.4em;
+    font-weight: 500;
+  }
+
+  .content :global(pre) {
+    background-color: #f9f9f9;
+    box-shadow: inset 1px 1px 5px rgba(0, 0, 0, 0.05);
+    padding: 0.5em;
+    border-radius: 2px;
+    overflow-x: auto;
+  }
+
+  .content :global(pre) :global(code) {
+    background-color: transparent;
+    padding: 0;
+  }
+
+  .content :global(ul) {
+    line-height: 1.5;
+  }
+
+  .content :global(li) {
+    margin: 0 0 0.5em 0;
+  }
+
+  .content :global(img) {
+    max-width: 100%;
+  }
+
+  .spacer {
+    margin: 3rem 0;
+  }
+</style>
+
+<svelte:head>
+  <title>{story.title}</title>
+</svelte:head>
+
+<h1>{story.title}</h1>
+<StoryInfo {story} />
+
+<div class="content">
+  {@html story.text}
+</div>
+
+{#if hasComments}
+  <hr class="spacer" />
+  <h2 id="comments">Comments</h2>
+  {#if related.length}
+    <h3>
+      Other discussions:
+      {#each related as r}
+        {#if r.num_comments}
+          <a href="/{r.id}#comments" rel="prefetch">{r.source}</a>
+        {/if}
+      {/each}
+    </h3>
+  {/if}
+  {#if story.comments.length}
+    <div class="comments">
+      {#each story.comments as comment}
+        <Comment {story} {comment} />
+      {/each}
+    </div>
+  {/if}
+{/if}

webapp/src/routes/_error.svelte

@@ -0,0 +1,40 @@
+<script>
+	export let status;
+	export let error;
+
+	const dev = process.env.NODE_ENV === 'development';
+</script>
+
+<style>
+	h1, p {
+		margin: 0 auto;
+	}
+
+	h1 {
+		font-size: 2.8em;
+		font-weight: 700;
+		margin: 0 0 0.5em 0;
+	}
+
+	p {
+		margin: 1em auto;
+	}
+
+	@media (min-width: 480px) {
+		h1 {
+			font-size: 4em;
+		}
+	}
+</style>
+
+<svelte:head>
+	<title>{status}</title>
+</svelte:head>
+
+<h1>{status}</h1>
+
+<p>{error.message}</p>
+
+{#if dev && error.stack}
+	<pre>{error.stack}</pre>
+{/if}

webapp/src/routes/_layout.svelte

@@ -0,0 +1,21 @@
+<script>
+  import Nav from "../components/Nav.svelte";
+  export let segment;
+</script>
+
+<style>
+  main {
+    position: relative;
+    max-width: 56em;
+    background-color: white;
+    padding: 2em;
+    margin: 0 auto;
+    box-sizing: border-box;
+  }
+</style>
+
+<Nav {segment} />
+
+<main>
+  <slot {segment} />
+</main>

webapp/src/routes/index.json.js

@@ -0,0 +1,9 @@
+import fetch from 'node-fetch';
+
+export async function get(req, res) {
+	const response = await fetch(`http://localhost:33842/api`);
+	res.writeHead(200, {
+		'Content-Type': 'application/json'
+	});
+	res.end(await response.text());
+}

webapp/src/routes/index.svelte

@@ -0,0 +1,50 @@
+<script context="module">
+  export function preload() {
+    return this.fetch(`index.json`)
+      .then((r) => r.json())
+      .then(({ stories }) => {
+        return { stories };
+      });
+  }
+</script>
+
+<script>
+  import { getLogoUrl } from "../utils/logos.js";
+  import StoryInfo from "../components/StoryInfo.svelte";
+
+  export let stories;
+</script>
+
+<style>
+  article {
+    margin: 0.5rem 0;
+  }
+</style>
+
+<svelte:head>
+  <title>News</title>
+</svelte:head>
+
+<section>
+  {#each stories as story}
+    <!-- we're using the non-standard `rel=prefetch` attribute to
+				tell Sapper to load the data for the page as soon as
+				the user hovers over the link or taps it, instead of
+				waiting for the 'click' event -->
+    <article>
+      <header>
+        <img
+          src={getLogoUrl(story)}
+          alt="logo"
+          style="height: 1rem; width: 1rem;" />
+        <a rel="prefetch" href="/{story.id}">{story.title}</a>
+        (<a href={story.url || story.link}>
+          {new URL(story.url || story.link).hostname.replace(/^www\./, '')}
+        </a>)
+      </header>
+      <section>
+        <StoryInfo {story} />
+      </section>
+    </article>
+  {/each}
+</section>

webapp/src/server.js

@@ -0,0 +1,17 @@
+import sirv from 'sirv';
+import polka from 'polka';
+import compression from 'compression';
+import * as sapper from '@sapper/server';
+
+const { PORT, NODE_ENV } = process.env;
+const dev = NODE_ENV === 'development';
+
+polka() // You can also use Express
+	.use(
+		compression({ threshold: 0 }),
+		sirv('static', { dev }),
+		sapper.middleware(),
+	)
+	.listen(PORT, err => {
+		if (err) console.log('error', err);
+	});

webapp/src/service-worker.js

@@ -0,0 +1,86 @@
+import { timestamp, files, shell } from '@sapper/service-worker';
+
+const ASSETS = `cache${timestamp}`;
+
+// `shell` is an array of all the files generated by the bundler,
+// `files` is an array of everything in the `static` directory
+const to_cache = shell.concat(files);
+const staticAssets = new Set(to_cache);
+
+self.addEventListener('install', event => {
+	event.waitUntil(
+		caches
+			.open(ASSETS)
+			.then(cache => cache.addAll(to_cache))
+			.then(() => {
+				self.skipWaiting();
+			})
+	);
+});
+
+self.addEventListener('activate', event => {
+	event.waitUntil(
+		caches.keys().then(async keys => {
+			// delete old caches
+			for (const key of keys) {
+				if (key !== ASSETS) await caches.delete(key);
+			}
+
+			self.clients.claim();
+		})
+	);
+});
+
+
+/**
+ * Fetch the asset from the network and store it in the cache. 
+ * Fall back to the cache if the user is offline.
+ */
+async function fetchAndCache(request) {
+	const cache = await caches.open(`offline${timestamp}`)
+
+	try {
+		const response = await fetch(request);
+		cache.put(request, response.clone());
+		return response;
+	} catch (err) {
+		const response = await cache.match(request);
+		if (response) return response;
+
+		throw err;
+	}
+}
+
+self.addEventListener('fetch', event => {
+	if (event.request.method !== 'GET' || event.request.headers.has('range')) return;
+
+	const url = new URL(event.request.url);
+
+	// don't try to handle e.g. data: URIs
+	const isHttp = url.protocol.startsWith('http');
+	const isDevServerRequest = url.hostname === self.location.hostname && url.port !== self.location.port;
+	const isStaticAsset = url.host === self.location.host && staticAssets.has(url.pathname);
+	const skipBecauseUncached = event.request.cache === 'only-if-cached' && !isStaticAsset;
+
+	if (isHttp && !isDevServerRequest && !skipBecauseUncached) {
+		event.respondWith(
+			(async () => {
+				// always serve static files and bundler-generated assets from cache.
+				// if your application has other URLs with data that will never change,
+				// set this variable to true for them and they will only be fetched once.
+				const cachedAsset = isStaticAsset && await caches.match(event.request);
+
+				// for pages, you might want to serve a shell `service-worker-index.html` file,
+				// which Sapper has generated for you. It's not right for every
+				// app, but if it's right for yours then uncomment this section
+				/*
+				if (!cachedAsset && url.origin === self.origin && routes.find(route => route.pattern.test(url.pathname))) {
+					return caches.match('/service-worker-index.html');
+				}
+				*/
+
+				return cachedAsset || fetchAndCache(event.request);
+			})()
+		);
+	}
+});

webapp/src/template.html

@@ -0,0 +1,33 @@
+<!doctype html>
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<meta name="viewport" content="width=device-width,initial-scale=1.0">
+	<meta name="theme-color" content="#333333">
+
+	%sapper.base%
+
+	<link rel="stylesheet" href="global.css">
+	<link rel="manifest" href="manifest.json" crossorigin="use-credentials">
+	<link rel="icon" type="image/png" href="favicon.png">
+
+	<!-- Sapper creates a <script> tag containing `src/client.js`
+	     and anything else it needs to hydrate the app and
+	     initialise the router -->
+	%sapper.scripts%
+
+	<!-- Sapper generates a <style> tag containing critical CSS
+	     for the current page. CSS for the rest of the app is
+	     lazily loaded when it precaches secondary pages -->
+	%sapper.styles%
+
+	<!-- This contains the contents of the <svelte:head> component, if
+	     the current page has one -->
+	%sapper.head%
+</head>
+<body>
+	<!-- The application will be rendered inside this element,
+	     because `src/client.js` references it -->
+	<div id="sapper">%sapper.html%</div>
+</body>
+</html>

webapp/static/global.css

@@ -0,0 +1,36 @@
+body {
+	margin: 0;
+	font-family: Roboto, -apple-system, BlinkMacSystemFont, Segoe UI, Oxygen, Ubuntu, Cantarell, Fira Sans, Droid Sans, Helvetica Neue, sans-serif;
+	font-size: 14px;
+	line-height: 1.5;
+	color: #333;
+}
+
+h1, h2, h3, h4, h5, h6 {
+	margin: 0 0 0.5em 0;
+	font-weight: 400;
+	line-height: 1.2;
+}
+
+h1 {
+	font-size: 2em;
+}
+
+a {
+	color: inherit;
+}
+
+code {
+	font-family: menlo, inconsolata, monospace;
+	font-size: calc(1em - 2px);
+	color: #555;
+	background-color: #f0f0f0;
+	padding: 0.2em 0.4em;
+	border-radius: 2px;
+}
+
+@media (min-width: 400px) {
+	body {
+		font-size: 16px;
+	}
+}

webapp/static/manifest.json

@@ -0,0 +1,20 @@
+{
+	"background_color": "#ffffff",
+	"theme_color": "#333333",
+	"name": "TODO",
+	"short_name": "TODO",
+	"display": "minimal-ui",
+	"start_url": "/",
+	"icons": [
+		{
+			"src": "logo-192.png",
+			"sizes": "192x192",
+			"type": "image/png"
+		},
+		{
+			"src": "logo-512.png",
+			"sizes": "512x512",
+			"type": "image/png"
+		}
+	]
+}

webapp/webpack.config.js

@@ -0,0 +1,90 @@
+const webpack = require('webpack');
+const WebpackModules = require('webpack-modules');
+const path = require('path');
+const config = require('sapper/config/webpack.js');
+const pkg = require('./package.json');
+
+const mode = process.env.NODE_ENV;
+const dev = mode === 'development';
+
+const alias = { svelte: path.resolve('node_modules', 'svelte') };
+const extensions = ['.mjs', '.js', '.json', '.svelte', '.html'];
+const mainFields = ['svelte', 'module', 'browser', 'main'];
+const fileLoaderRule = {
+	test: /\.(png|jpe?g|gif)$/i,
+	use: [
+		'file-loader',
+	]
+};
+
+module.exports = {
+	client: {
+		entry: config.client.entry(),
+		output: config.client.output(),
+		resolve: { alias, extensions, mainFields },
+		module: {
+			rules: [
+				{
+					test: /\.(svelte|html)$/,
+					use: {
+						loader: 'svelte-loader',
+						options: {
+							dev,
+							hydratable: true,
+							hotReload: false // pending https://github.com/sveltejs/svelte/issues/2377
+						}
+					}
+				},
+				fileLoaderRule
+			]
+		},
+		mode,
+		plugins: [
+			// pending https://github.com/sveltejs/svelte/issues/2377
+			// dev && new webpack.HotModuleReplacementPlugin(),
+			new webpack.DefinePlugin({
+				'process.browser': true,
+				'process.env.NODE_ENV': JSON.stringify(mode)
+			}),
+		].filter(Boolean),
+		devtool: dev && 'inline-source-map'
+	},
+
+	server: {
+		entry: config.server.entry(),
+		output: config.server.output(),
+		target: 'node',
+		resolve: { alias, extensions, mainFields },
+		externals: Object.keys(pkg.dependencies).concat('encoding'),
+		module: {
+			rules: [
+				{
+					test: /\.(svelte|html)$/,
+					use: {
+						loader: 'svelte-loader',
+						options: {
+							css: false,
+							generate: 'ssr',
+							hydratable: true,
+							dev
+						}
+					}
+				},
+				fileLoaderRule
+			]
+		},
+		mode,
+		plugins: [
+			new WebpackModules()
+		],
+		performance: {
+			hints: false // it doesn't matter if server.js is large
+		}
+	},
+
+	serviceworker: {
+		entry: config.serviceworker.entry(),
+		output: config.serviceworker.output(),
+		mode
+	}
+};