Log events in visualization

src/logger.ts

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+import firebase from 'firebase/app';
+import 'firebase/database';
+import store from './store';
+
+const firebaseConfig = {
+  apiKey: 'AIzaSyCORIIdFkDBagiVf0IeK0UxZL1qv0m90_E',
+  authDomain: 'codewanderer-d9212.firebaseapp.com',
+  databaseURL: 'https://codewanderer-d9212-default-rtdb.europe-west1.firebasedatabase.app',
+  projectId: 'codewanderer-d9212',
+  storageBucket: 'codewanderer-d9212.appspot.com',
+  messagingSenderId: '143940874668',
+  appId: '1:143940874668:web:d2f860b4fc5d4292cf8a09',
+};
+
+type LogEventType =
+  | 'CC'
+  | 'OC'
+  | 'RC'
+  | 'LI'
+  | 'LR'
+  | 'LS'
+  | 'LC'
+  | 'PI'
+  | 'PR'
+  | 'PS'
+  | 'PC'
+  | 'NI'
+  | 'NR'
+  | 'NS'
+  | 'NC'
+  | 'GF'
+  | 'SF'
+  | 'OTHER';
+
+export interface LogEvent {
+  timestamp: number;
+  type: LogEventType;
+  message?: string;
+  additionalData?: any;
+}
+
+export class Logger {
+  database: firebase.database.Database;
+
+  constructor() {
+    firebase.initializeApp(firebaseConfig);
+    this.database = firebase.database();
+  }
+
+  public log(ev: LogEvent) {
+    console.log('Logging event');
+    const uid = store.getState().uid;
+    const logEvKey = this.database.ref(uid).child('logs').push().key;
+
+    this.database.ref(uid).update({ [`logs/${logEvKey}`]: ev });
+  }
+
+  public logPersonalData() {}
+
+  public logKnowledgeQuestions() {}
+
+  public logGeneralQuestions() {}
+}
+
+export const logger = new Logger();