.

src/.editorconfig

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+# http://editorconfig.org
+root = true
+
+[*]
+indent_style = tab
+tab_width = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.yml]
+indent_style = space

src/.gitignore

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+.DS_Store
+/node_modules
+*-lock.*
+*.lock
+*.log
+.wrangler

src/.prettierrc

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+{
+	"semi": true,
+	"printWidth": 100,
+	"singleQuote": true,
+	"bracketSpacing": true,
+	"insertPragma": false,
+	"requirePragma": false,
+	"jsxSingleQuote": false,
+	"bracketSameLine": false,
+	"embeddedLanguageFormatting": "auto",
+	"htmlWhitespaceSensitivity": "css",
+	"vueIndentScriptAndStyle": true,
+	"quoteProps": "consistent",
+	"proseWrap": "preserve",
+	"trailingComma": "es5",
+	"arrowParens": "avoid",
+	"useTabs": true,
+	"tabWidth": 2
+}

src/README.md

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+## Template: worker-router
+
+[![Deploy to Cloudflare Workers](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/cloudflare/templates/tree/main/worker-router)
+
+This template demonstrates using the [`itty-router`](https://github.com/kwhitley/itty-router) package to add routing to your Cloudflare Workers.
+
+[`index.js`](https://github.com/cloudflare/worker-template-router/blob/master/index.js) is the content of the Workers script.
+
+## Setup
+
+To create a `my-project` directory using this template, run:
+
+```sh
+$ npx wrangler generate my-project worker
+# or
+$ yarn wrangler generate my-project worker
+# or
+$ pnpm wrangler generate my-project worker
+```
+
+Before publishing your code you need to edit `wrangler.toml` file and add your Cloudflare `account_id` - more information about configuring and publishing your code can be found [in the documentation](https://developers.cloudflare.com/workers/learning/getting-started).
+
+Once you are ready, you can publish your code by running the following command:
+
+```sh
+$ npm run deploy
+# or
+$ yarn run deploy
+# or
+$ pnpm run deploy
+```

src/defaultparser.js

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+
+/*
+* @param {string} stufe - The grade of the student.
+* @param {string} klasse - The class of the student.
+* @param {boolean} isStudent - Whether the user is a student or Teacher/Parent.
+*
+* @returns {Object} - The extracted data from the input.
+* */
+export function defaultSubstitutionsFilterExtractor(stufe, klasse, isStudent) {
+	klasse = klasse.toLowerCase();
+
+	//Oberstufenklassen haben oft sehr seltsame Bezeichnungen. Diese sollen primär schulspezifisch gehandhabt werden.
+	if (klasse.includes("q") || klasse.includes("e")) {
+		//get first digit from string
+		let klasseMatch = klasse.match(/\d+/);
+		return {
+			"stufe": klasse.includes("q") ? "Q" : "E",
+			"klasse": klasseMatch ? klasseMatch[0] : "",
+			"lehrer": "",
+		}
+	}
+
+	//Klassenbezeichnungen wie 5a, 5b, 5c, 5d, 10a, 10b, 13c etc.
+	//lösung mit regex
+	let klasseMatch = klasse.match(/(\d+)([a-zA-Z]+)/);
+	if (klasseMatch) {
+		return {
+			"stufe": parseInt(klasseMatch[1]),
+			"klasse": klasseMatch[2],
+			"lehrer": "",
+		}
+	}
+
+
+	return {klasse: "", stufe: "", lehrer: ""};
+}

src/index.js

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+import { Router } from 'itty-router';
+import SCHOOL_CONFIGS from "./school_config";
+
+const router = Router();
+
+
+
+router.get('/substitutions/:schoolID', ({ params, query }) => {
+	const { schoolID } = params;
+	const { stufe, klasse, isStudent } = query;
+
+	let result;
+
+	if (!SCHOOL_CONFIGS[schoolID]) {
+		result = SCHOOL_CONFIGS["default"](stufe, klasse, isStudent);
+	} else {
+		result = SCHOOL_CONFIGS[schoolID](stufe, klasse, isStudent);
+	}
+
+	return new Response(JSON.stringify(result), {
+		headers: {
+			'Content-Type': "application/json",
+		},
+	});
+});
+
+
+router.all('*', () => new Response("",{status: 302, headers: {"location": "https://github.com/alessioc42/lanis-mobile-autoconfig"} }));
+
+export default {
+	fetch: router.handle,
+};

src/package.json

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+{
+	"name": "template-worker-router",
+	"version": "0.0.0",
+	"private": true,
+	"scripts": {
+		"deploy": "wrangler deploy index.js",
+		"dev": "wrangler dev index.js",
+		"test": "vitest"
+	},
+	"dependencies": {
+		"itty-router": "^2.6.1"
+	},
+	"devDependencies": {
+		"wrangler": "^3.0.0"
+	}
+}

src/school_config.js

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+import {defaultSubstitutionsFilterExtractor} from "./defaultparser";
+
+
+let SCHOOL_CONFIGS = {
+	"default": (stufe, klasse, isStudent) => {
+		return defaultSubstitutionsFilterExtractor(stufe, klasse, isStudent)
+	},
+	//Configs for Max-Planck-Schule Rüsselsheim
+	"5182": (stufe, klasse, isStudent) => {
+		let result =  defaultSubstitutionsFilterExtractor(stufe, klasse, isStudent);
+
+		if (result.stufe === "Q" || result.stufe === "E") {
+			switch (result.klasse) {
+				case "1" || "2":
+					result.klasse = "1/2";
+					break;
+				case "3" || "4":
+					result.klasse = "3/4";
+					break;
+			}
+		}
+
+		return result;
+	}
+}
+
+export default  SCHOOL_CONFIGS;

src/wrangler.toml

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+name = "lanis-mobile-autoconfig"
+main = "index.js"
+compatibility_date = "2022-05-03"