Added serverless scheduled functions with Firebase

functions/package.json

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+{
+  "name": "functions",
+  "scripts": {
+    "lint": "tslint --project tsconfig.json",
+    "build": "tsc",
+    "serve": "npm run build && firebase emulators:start --only functions",
+    "shell": "npm run build && firebase functions:shell",
+    "start": "npm run shell",
+    "deploy": "firebase deploy --only functions",
+    "logs": "firebase functions:log"
+  },
+  "engines": {
+    "node": "10"
+  },
+  "main": "lib/index.js",
+  "dependencies": {
+    "firebase-admin": "^8.10.0",
+    "firebase-functions": "^3.6.1"
+  },
+  "devDependencies": {
+    "axios": "^0.19.2",
+    "firebase-functions-test": "^0.2.0",
+    "tslint": "^5.12.0",
+    "typescript": "^3.8.0"
+  },
+  "private": true
+}

functions/src/index.ts

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+import * as functions from "firebase-functions";
+import * as admin from "firebase-admin";
+
+admin.initializeApp();
+const db = admin.firestore();
+
+import axios from "axios";
+
+exports.scheduledUpdate = functions.pubsub
+  .schedule("5 * * * *")
+  .onRun(async (context) => {
+    const stationData: {
+      stationName: string;
+      dispatcherName: string;
+    }[] = await (
+      await axios.get("https://api.td2.info.pl:9640/?method=getStationsOnline")
+    ).data.message;
+
+    const historyRef = db.collection("history");
+
+    stationData.forEach(async (station) => {
+      const docRef = historyRef.doc(station.stationName);
+      const docSnapshot = await docRef.get();
+
+      if (!docSnapshot.exists) {
+        docRef.set({
+          occupiedFrom: Date.now(),
+          currentDispatcherName: station.dispatcherName,
+        });
+
+        docRef.collection("dispatcherHistory").add({
+          dispatcherName: station.dispatcherName,
+          occupiedFrom: Date.now(),
+          occupiedTo: 0,
+        });
+
+        return;
+      }
+    });
+
+    const snapshot = await historyRef.get();
+
+    snapshot.forEach(async (doc) => {
+      const docData = doc.data();
+      const docRef = historyRef.doc(doc.id);
+
+      const APIStationData = stationData.find(
+        (station) => station.stationName == doc.id
+      );
+
+      if (docData.currentDispatcherName != "") {
+        if (
+          !APIStationData ||
+          APIStationData.dispatcherName != docData.currentDispatcherName
+        ) {
+          docRef.update({
+            currentDispatcherName: !APIStationData
+              ? ""
+              : APIStationData.dispatcherName,
+            occupiedFrom: !APIStationData ? 0 : Date.now(),
+          });
+
+          docRef.collection("dispatcherHistory").add({
+            currentDispatcherName: docData.currentDispatcherName,
+            occupiedFrom: docData.occupiedFrom,
+            occupiedTo: Date.now(),
+          });
+        }
+      } else if (APIStationData) {
+        docRef.update({
+          currentDispatcherName: APIStationData.dispatcherName,
+          occupiedFrom: Date.now(),
+        });
+      }
+    });
+  });

functions/tsconfig.json

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+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "outDir": "lib",
+    "sourceMap": true,
+    "strict": true,
+    "target": "es2017"
+  },
+  "compileOnSave": true,
+  "include": [
+    "src"
+  ]
+}

functions/tslint.json

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+{
+  "rules": {
+    // -- Strict errors --
+    // These lint rules are likely always a good idea.
+
+    // Force function overloads to be declared together. This ensures readers understand APIs.
+    "adjacent-overload-signatures": true,
+
+    // Do not allow the subtle/obscure comma operator.
+    "ban-comma-operator": true,
+
+    // Do not allow internal modules or namespaces . These are deprecated in favor of ES6 modules.
+    "no-namespace": true,
+
+    // Do not allow parameters to be reassigned. To avoid bugs, developers should instead assign new values to new vars.
+    "no-parameter-reassignment": true,
+
+    // Force the use of ES6-style imports instead of /// <reference path=> imports.
+    "no-reference": true,
+
+    // Do not allow type assertions that do nothing. This is a big warning that the developer may not understand the
+    // code currently being edited (they may be incorrectly handling a different type case that does not exist).
+    "no-unnecessary-type-assertion": true,
+
+    // Disallow nonsensical label usage.
+    "label-position": true,
+
+    // Disallows the (often typo) syntax if (var1 = var2). Replace with if (var2) { var1 = var2 }.
+    "no-conditional-assignment": true,
+
+    // Disallows constructors for primitive types (e.g. new Number('123'), though Number('123') is still allowed).
+    "no-construct": true,
+
+    // Do not allow super() to be called twice in a constructor.
+    "no-duplicate-super": true,
+
+    // Do not allow the same case to appear more than once in a switch block.
+    "no-duplicate-switch-case": true,
+
+    // Do not allow a variable to be declared more than once in the same block. Consider function parameters in this
+    // rule.
+    "no-duplicate-variable": [true, "check-parameters"],
+
+    // Disallows a variable definition in an inner scope from shadowing a variable in an outer scope. Developers should
+    // instead use a separate variable name.
+    "no-shadowed-variable": true,
+
+    // Empty blocks are almost never needed. Allow the one general exception: empty catch blocks.
+    "no-empty": [true, "allow-empty-catch"],
+
+    // Functions must either be handled directly (e.g. with a catch() handler) or returned to another function.
+    // This is a major source of errors in Cloud Functions and the team strongly recommends leaving this rule on.
+    "no-floating-promises": false,
+
+    // Do not allow any imports for modules that are not in package.json. These will almost certainly fail when
+    // deployed.
+    "no-implicit-dependencies": true,
+
+    // The 'this' keyword can only be used inside of classes.
+    "no-invalid-this": true,
+
+    // Do not allow strings to be thrown because they will not include stack traces. Throw Errors instead.
+    "no-string-throw": true,
+
+    // Disallow control flow statements, such as return, continue, break, and throw in finally blocks.
+    "no-unsafe-finally": true,
+
+    // Expressions must always return a value. Avoids common errors like const myValue = functionReturningVoid();
+    "no-void-expression": [true, "ignore-arrow-function-shorthand"],
+
+    // Disallow duplicate imports in the same file.
+    "no-duplicate-imports": true,
+
+    // -- Strong Warnings --
+    // These rules should almost never be needed, but may be included due to legacy code.
+    // They are left as a warning to avoid frustration with blocked deploys when the developer
+    // understand the warning and wants to deploy anyway.
+
+    // Warn when an empty interface is defined. These are generally not useful.
+    "no-empty-interface": { "severity": "warning" },
+
+    // Warn when an import will have side effects.
+    "no-import-side-effect": { "severity": "warning" },
+
+    // Warn when variables are defined with var. Var has subtle meaning that can lead to bugs. Strongly prefer const for
+    // most values and let for values that will change.
+    "no-var-keyword": { "severity": "warning" },
+
+    // Prefer === and !== over == and !=. The latter operators support overloads that are often accidental.
+    "triple-equals": { "severity": "warning" },
+
+    // Warn when using deprecated APIs.
+    "deprecation": { "severity": "warning" },
+
+    // -- Light Warnings --
+    // These rules are intended to help developers use better style. Simpler code has fewer bugs. These would be "info"
+    // if TSLint supported such a level.
+
+    // prefer for( ... of ... ) to an index loop when the index is only used to fetch an object from an array.
+    // (Even better: check out utils like .map if transforming an array!)
+    "prefer-for-of": { "severity": "warning" },
+
+    // Warns if function overloads could be unified into a single function with optional or rest parameters.
+    "unified-signatures": { "severity": "warning" },
+
+    // Prefer const for values that will not change. This better documents code.
+    "prefer-const": { "severity": "warning" },
+
+    // Multi-line object literals and function calls should have a trailing comma. This helps avoid merge conflicts.
+    "trailing-comma": { "severity": "warning" }
+  },
+
+  "defaultSeverity": "error"
+}

functions/ui-debug.log

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+Web / API server started at http://localhost:4000