Initial commit

.gitignore

+/node_modules/
+/public/build/
+
+.DS_Store

.vscode/extensions.json

+{
+  "recommendations": ["svelte.svelte-vscode"]
+}

README.md

+*Looking for a shareable component template? Go here --> [sveltejs/component-template](https://github.com/sveltejs/component-template)*
+
+---
+
+# svelte app
+
+This is a project template for [Svelte](https://svelte.dev) apps. It lives at https://github.com/sveltejs/template.
+
+To create a new project based on this template using [degit](https://github.com/Rich-Harris/degit):
+
+```bash
+npx degit sveltejs/template svelte-app
+cd svelte-app
+```
+
+*Note that you will need to have [Node.js](https://nodejs.org) installed.*
+
+
+## Get started
+
+Install the dependencies...
+
+```bash
+cd svelte-app
+npm install
+```
+
+...then start [Rollup](https://rollupjs.org):
+
+```bash
+npm run dev
+```
+
+Navigate to [localhost:5000](http://localhost:5000). You should see your app running. Edit a component file in `src`, save it, and reload the page to see your changes.
+
+By default, the server will only respond to requests from localhost. To allow connections from other computers, edit the `sirv` commands in package.json to include the option `--host 0.0.0.0`.
+
+If you're using [Visual Studio Code](https://code.visualstudio.com/) we recommend installing the official extension [Svelte for VS Code](https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode). If you are using other editors you may need to install a plugin in order to get syntax highlighting and intellisense.
+
+## Building and running in production mode
+
+To create an optimised version of the app:
+
+```bash
+npm run build
+```
+
+You can run the newly built app with `npm run start`. This uses [sirv](https://github.com/lukeed/sirv), which is included in your package.json's `dependencies` so that the app will work when you deploy to platforms like [Heroku](https://heroku.com).
+
+
+## Single-page app mode
+
+By default, sirv will only respond to requests that match files in `public`. This is to maximise compatibility with static fileservers, allowing you to deploy your app anywhere.
+
+If you're building a single-page app (SPA) with multiple routes, sirv needs to be able to respond to requests for *any* path. You can make it so by editing the `"start"` command in package.json:
+
+```js
+"start": "sirv public --single"
+```
+
+## Using TypeScript
+
+This template comes with a script to set up a TypeScript development environment, you can run it immediately after cloning the template with:
+
+```bash
+node scripts/setupTypeScript.js
+```
+
+Or remove the script via:
+
+```bash
+rm scripts/setupTypeScript.js
+```
+
+## Deploying to the web
+
+### With [Vercel](https://vercel.com)
+
+Install `vercel` if you haven't already:
+
+```bash
+npm install -g vercel
+```
+
+Then, from within your project folder:
+
+```bash
+cd public
+vercel deploy --name my-project
+```
+
+### With [surge](https://surge.sh/)
+
+Install `surge` if you haven't already:
+
+```bash
+npm install -g surge
+```
+
+Then, from within your project folder:
+
+```bash
+npm run build
+surge public my-project.surge.sh
+```

package.json

+{
+  "name": "svelte-app",
+  "version": "1.0.0",
+  "scripts": {
+    "build": "rollup -c",
+    "dev": "rollup -c -w",
+    "start": "sirv public",
+    "validate": "svelte-check",
+    "test": "./node_modules/.bin/mocha --require ts-node/register ./src/test/*.spec.ts"
+  },
+  "devDependencies": {
+    "@rollup/plugin-commonjs": "^17.0.0",
+    "@rollup/plugin-node-resolve": "^11.0.0",
+    "@rollup/plugin-typescript": "^8.0.0",
+    "@tsconfig/svelte": "^1.0.0",
+    "@types/chai": "^4.2.15",
+    "@types/mocha": "^8.2.1",
+    "@types/node": "^14.14.31",
+    "chai": "^4.3.0",
+    "mocha": "^8.3.0",
+    "prettier": "^2.2.1",
+    "rollup": "^2.3.4",
+    "rollup-plugin-css-only": "^3.1.0",
+    "rollup-plugin-livereload": "^2.0.0",
+    "rollup-plugin-svelte": "^7.0.0",
+    "rollup-plugin-terser": "^7.0.0",
+    "svelte": "^3.0.0",
+    "svelte-check": "^1.0.0",
+    "svelte-preprocess": "^4.0.0",
+    "ts-node": "^9.1.1",
+    "tslib": "^2.0.0",
+    "typescript": "^4.0.0"
+  },
+  "dependencies": {
+    "sirv-cli": "^1.0.0"
+  }
+}

public/global.css

+.tg {
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+.tg td {
+  border-color: black;
+  border-style: solid;
+  border-width: 1px;
+  font-family: Arial, sans-serif;
+  font-size: 14px;
+  overflow: hidden;
+  padding: 10px 5px;
+  word-break: normal;
+}
+.tg th {
+  border-color: black;
+  border-style: solid;
+  border-width: 1px;
+  font-family: Arial, sans-serif;
+  font-size: 14px;
+  font-weight: normal;
+  overflow: hidden;
+  padding: 10px 5px;
+  word-break: normal;
+}
+.tg .tg-0lax {
+  text-align: left;
+  vertical-align: top;
+}
+input {
+  width: 6rem;
+}

public/index.html

+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset='utf-8'>
+	<meta name='viewport' content='width=device-width,initial-scale=1'>
+
+	<title>Svelte app</title>
+
+	<link rel='icon' type='image/png' href='/favicon.png'>
+	<link rel='stylesheet' href='/global.css'>
+	<link rel='stylesheet' href='/build/bundle.css'>
+
+	<script defer src='/build/bundle.js'></script>
+</head>
+
+<body>
+</body>
+</html>

rollup.config.js

+import svelte from 'rollup-plugin-svelte';
+import commonjs from '@rollup/plugin-commonjs';
+import resolve from '@rollup/plugin-node-resolve';
+import livereload from 'rollup-plugin-livereload';
+import { terser } from 'rollup-plugin-terser';
+import sveltePreprocess from 'svelte-preprocess';
+import typescript from '@rollup/plugin-typescript';
+import css from 'rollup-plugin-css-only';
+
+const production = !process.env.ROLLUP_WATCH;
+
+function serve() {
+	let server;
+
+	function toExit() {
+		if (server) server.kill(0);
+	}
+
+	return {
+		writeBundle() {
+			if (server) return;
+			server = require('child_process').spawn('npm', ['run', 'start', '--', '--dev'], {
+				stdio: ['ignore', 'inherit', 'inherit'],
+				shell: true
+			});
+
+			process.on('SIGTERM', toExit);
+			process.on('exit', toExit);
+		}
+	};
+}
+
+export default {
+	input: 'src/main.ts',
+	output: {
+		sourcemap: true,
+		format: 'iife',
+		name: 'app',
+		file: 'public/build/bundle.js'
+	},
+	plugins: [
+		svelte({
+			preprocess: sveltePreprocess({ sourceMap: !production }),
+			compilerOptions: {
+				// enable run-time checks when not in production
+				dev: !production
+			}
+		}),
+		// we'll extract any component CSS out into
+		// a separate file - better for performance
+		css({ output: 'bundle.css' }),
+
+		// If you have external dependencies installed from
+		// npm, you'll most likely need these plugins. In
+		// some cases you'll need additional configuration -
+		// consult the documentation for details:
+		// https://github.com/rollup/plugins/tree/master/packages/commonjs
+		resolve({
+			browser: true,
+			dedupe: ['svelte']
+		}),
+		commonjs(),
+		typescript({
+			sourceMap: !production,
+			inlineSources: !production
+		}),
+
+		// In dev mode, call `npm run start` once
+		// the bundle has been generated
+		!production && serve(),
+
+		// Watch the `public` directory and refresh the
+		// browser on changes when not in production
+		!production && livereload('public'),
+
+		// If we're building for production (npm run build
+		// instead of npm run dev), minify
+		production && terser()
+	],
+	watch: {
+		clearScreen: false
+	}
+};

src/App.svelte

+<script lang="ts">
+    import type { WorkPackage } from "./estimator";
+    import RowWorkItem from "./RowWorkItem.svelte";
+    import SumRow from "./SumRow.svelte";
+
+    const NUMBER_OF_WORKPACKAGES = 10;
+
+    let workPackages: WorkPackage[] = []
+    for (let i = 0; i <= NUMBER_OF_WORKPACKAGES; i++) {
+        workPackages.push({a: null, b:null, c: null});
+    }
+    $: dataJson = JSON.stringify(workPackages, null, 2)
+</script>
+
+<main>
+	<table class="tg">
+        <thead>
+            <th class="tg-0lax">a</th>
+            <th class="tg-0lax">c</th>
+            <th class="tg-0lax">b</th>
+            <th class="tg-0lax">E</th>
+            <th class="tg-0lax">S</th>
+            <th class="tg-0lax">S/E</th>
+            <th class="tg-0lax">V</th>
+        </thead>
+        <tbody>
+            {#each workPackages as workPackage, i (i)}
+                <RowWorkItem bind:a={workPackage.a} bind:b={workPackage.b} bind:c={workPackage.c}></RowWorkItem>
+            {/each}
+            <SumRow {workPackages}></SumRow>
+        </tbody>
+    </table>
+    <pre>
+        {dataJson}
+    </pre>
+</main>

src/RowWorkItem.svelte

+<script lang="ts">
+    import { calculateE, calculateS, calculateV } from "./estimator";
+    import { roundOne } from "./utils";
+
+    export let a: number
+    export let b: number
+    export let c: number;
+    $: E = ( typeof a !== "number" || typeof b !== "number") ? null : calculateE({a,b,c})
+    $: S = ( typeof a !== "number" || typeof b !== "number") ? null : calculateS({a,b,c})
+    $: V = ( typeof a !== "number" || typeof b !== "number") ? null : calculateV({a,b,c})
+    $: SEPercent = (typeof S !== 'number' || typeof E !== 'number') ? null : (S/E)*100
+
+    function hideNull(input: any|null): string {
+        return input === null ? "-" : ""+input;
+    }
+</script>
+
+<tr>
+    <td class="tg-0lax">
+        <input type="number" class="a-input" bind:value="{a}">
+    </td>
+    <td class="tg-0lax">
+        <input type="number" class="c-input" bind:value="{c}">
+    </td>
+    <td class="tg-0lax">
+        <input type="number" class="c-input"  bind:value="{b}">
+    </td>
+    <td class="tg-0lax">{hideNull(roundOne(E))}</td>
+    <td class="tg-0lax">{hideNull(roundOne(S))}</td>
+    <td class="tg-0lax">{hideNull(roundOne(SEPercent))}%</td>
+    <td class="tg-0lax">{hideNull(roundOne(V))}</td>
+</tr>
\ No newline at end of file

src/SumRow.svelte

+<script lang="ts">
+    import type { WorkPackage } from "./estimator";
+    import { calculateSSum, calculateESum } from './estimator';
+    import { roundOne, sumIgnoreNonNumbers } from "./utils";
+
+    export let workPackages: WorkPackage[]
+</script>
+<tr>
+    <td class="tg-0lax">
+        ∑ {sumIgnoreNonNumbers(workPackages.map(workPackage => workPackage.a))}
+    </td>
+    <td class="tg-0lax">
+        ∑ {sumIgnoreNonNumbers(workPackages.map(workPackage => workPackage.c))}
+    </td>
+    <td class="tg-0lax">
+        ∑ {sumIgnoreNonNumbers(workPackages.map(workPackage => workPackage.b))}
+    </td>
+    <td class="tg-0lax">
+        ∑ {roundOne(calculateESum(workPackages))}
+    </td>
+    <td class="tg-0lax">
+        ∑ {roundOne(calculateSSum(workPackages))}
+    </td>
+    <td class="tg-0lax">
+    </td>
+    <td class="tg-0lax">
+    </td>
+</tr>
\ No newline at end of file

src/estimator.ts

+import { sumIgnoreNonNumbers } from "./utils";
+
+export interface WorkPackage {
+  /** Lower bound of effort needed to complete workPackage */
+  a: number;
+  /** Upper bound of effort needed to complete workPackage */
+  b: number;
+  /** Average expected effort needed to complete workPackage */
+  c?: number;
+}
+
+/**
+ * Calculate the expected effort for a given workpackage
+ */
+export function calculateE(workPackage: WorkPackage): number {
+  const { a, b, c } = workPackage;
+  if (
+    typeof a !== "number" ||
+    a === null ||
+    typeof b !== "number" ||
+    b === null
+  ) {
+    throw new TypeError("@calculateE(): At least a and b must be numbers");
+  }
+  return typeof c !== "number" || c === null
+    ? (a + b) / 2
+    : (a + 4 * c + b) / 6;
+}
+
+export function calculateV(workPackage: WorkPackage): number {
+  const { a, b } = workPackage;
+  if (typeof a !== "number" || typeof b !== "number") {
+    throw new TypeError("@calculateV(): a and b must be numbers");
+  }
+  return ((b - a) * (b - a)) / 36;
+}
+
+export function calculateS(workPackage: WorkPackage): number {
+  const { a, b } = workPackage;
+  if (typeof a !== "number" || typeof b !== "number") {
+    throw new TypeError("@calculateS(): a and b must be numbers");
+  }
+  return (b - a) / 6;
+}
+
+export function calculateSSum(workPackages: WorkPackage[]): number {
+  return Math.sqrt(
+    sumIgnoreNonNumbers(
+      workPackages
+        .filter(({ a, b }) => typeof a === "number" && typeof b === "number")
+        .map((workPackage) => calculateS(workPackage))
+    )
+  );
+}
+
+export function calculateESum(workPackages: WorkPackage[]): number {
+  return sumIgnoreNonNumbers(
+    workPackages
+      .filter(({ a, b }) => typeof a === "number" && typeof b === "number")
+      .map((workPackage) => calculateE(workPackage))
+  );
+}

src/main.ts

+import App from './App.svelte';
+
+const app = new App({
+	target: document.body,
+	props: {
+		name: 'world'
+	}
+});
+
+export default app;
\ No newline at end of file

src/test/estimator.spec.ts

+import { WorkPackage, calculateE, calculateV, calculateS } from "../estimator";
+import "mocha";
+import { assert } from "chai";
+
+const roundOne = (n) => Math.round(n * Math.pow(10, 1)) / Math.pow(10, 1);
+
+describe("Estimator Calculation", function () {
+  describe("#calculateE()", function () {
+    it("should return 100, if a and b are 100 and c undefined", function () {
+      assert.equal(calculateE({ a: 100, b: 100 }), 100);
+    });
+
+    it("should return 100, if a and b are 100 and c null", function () {
+      assert.equal(calculateE({ a: 100, b: 100, c: null }), 100);
+    });
+
+    it("should return 50, if a = 0, b = 100 and c null", function () {
+      assert.equal(calculateE({ a: 0, b: 100, c: null }), 50);
+    });
+
+    it("should return 50, if a = 0, b = 100 and c = 50", function () {
+      assert.equal(calculateE({ a: 0, b: 100, c: 50 }), 50);
+    });
+
+    describe("Vorlesungsbeispiele:", function () {
+      it("should return 36.7, if {a,c,b} = {20,30,80}", function () {
+        assert.equal(roundOne(calculateE({ a: 20, c: 30, b: 80 })), 36.7);
+      });
+
+      it("should return 20, if {a,c,b} = {10,20,30}", function () {
+        assert.equal(roundOne(calculateE({ a: 10, c: 20, b: 30 })), 20);
+      });
+
+      it("should return 20.8, if {a,c,b} = {15,20,30}", function () {
+        assert.equal(roundOne(calculateE({ a: 15, c: 20, b: 30 })), 20.8);
+      });
+
+      it("should return 9.5, if {a,c,b} = {5,8,20}", function () {
+        assert.equal(roundOne(calculateE({ a: 5, c: 8, b: 20 })), 9.5);
+      });
+    });
+  });
+
+  describe("#calculateV()", function () {
+    describe("Vorlesungsbeispiele:", function () {
+      it("should return 36.7, if {a,c,b} = {20,30,80}", function () {
+        assert.equal(roundOne(calculateE({ a: 20, c: 30, b: 80 })), 36.7);
+      });
+
+      it("should return 11.1, if {a,c,b} = {10,20,30}", function () {
+        assert.equal(roundOne(calculateV({ a: 10, c: 20, b: 30 })), 11.1);
+      });
+
+      it("should return 6.3, if {a,c,b} = {15,20,30}", function () {
+        assert.equal(roundOne(calculateV({ a: 15, c: 20, b: 30 })), 6.3);
+      });
+
+      it("should return 6.3, if {a,c,b} = {5,8,20}", function () {
+        assert.equal(roundOne(calculateV({ a: 5, c: 8, b: 20 })), 6.3);
+      });
+    });
+  });
+
+  describe("#calculateS()", function () {
+    describe("Vorlesungsbeispiele:", function () {
+      it("should return 10, if {a,c,b} = {20,30,80}", function () {
+        assert.equal(roundOne(calculateS({ a: 20, c: 30, b: 80 })), 10);
+      });
+
+      it("should return 3.3, if {a,c,b} = {10,20,30}", function () {
+        assert.equal(roundOne(calculateS({ a: 10, c: 20, b: 30 })), 3.3);
+      });
+
+      it("should return 2.5, if {a,c,b} = {15,20,30}", function () {
+        assert.equal(roundOne(calculateS({ a: 15, c: 20, b: 30 })), 2.5);
+      });
+
+      it("should return 2.5, if {a,c,b} = {5,8,20}", function () {
+        assert.equal(roundOne(calculateS({ a: 5, c: 8, b: 20 })), 2.5);
+      });
+    });
+  });
+});

src/utils.ts

+/**
+ * Rounds a number to one digit after the period dot or null, if the input is not a number
+ * @param n number to round
+ */
+export function roundOne(n: number): number | null {
+  if (typeof n === "number" && !isNaN(n)) {
+    return Math.round(n * Math.pow(10, 1)) / Math.pow(10, 1);
+  } else {
+    return null;
+  }
+}
+
+export function sumIgnoreNonNumbers(values: number[]): number {
+  return values
+    .filter((n) => typeof n === "number")
+    .reduce((acc, curr) => acc + curr, 0);
+}

tsconfig.json

+{
+  "extends": "@tsconfig/svelte/tsconfig.json",
+  "compilerOptions": {
+    "types": ["mocha"]
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules/*", "__sapper__/*", "public/*"]
+}