refactor: transfer the calculation of the current month to the parent component

src/components/table-header/table-header.component.html

@@ -6,7 +6,7 @@
     Неделя: {{ startWeek | date:"shortDate" }}
     -
     {{ addDays(startWeek, 6) | date: "shortDate" }} 
-    <span [matBadge]="currentWeek()" matBadgeOverlap="false"></span>
+    <span [matBadge]="currentWeek" matBadgeOverlap="false"></span>
   </div>
   <div class="nav-button mat-h5">
     <button mat-flat-button (click)="weekEvent.emit(false)" [disabled]="!canBefore()">

src/components/table-header/table-header.component.ts

@@ -1,6 +1,6 @@
 import {Component, EventEmitter, Input, Output} from '@angular/core';
 import {DatePipe} from "@angular/common";
-import {addDays, weekInYear} from "@progress/kendo-date-math";
+import {addDays} from "@progress/kendo-date-math";
 import {MatButton} from "@angular/material/button";
 import {MatIcon} from "@angular/material/icon";
 import {MatBadge} from "@angular/material/badge";
@@ -20,15 +20,29 @@ import {MatBadge} from "@angular/material/badge";
 
 export class TableHeaderComponent {
   @Input() startWeek!: Date;
-  @Input() startTerm!: Date;
+  @Input() currentWeek!: number;
   @Output() weekEvent: EventEmitter<boolean | null> = new EventEmitter<boolean | null>();
 
-  currentWeek(): number {
-    return (weekInYear(this.startWeek) - weekInYear(this.startTerm)) + 1;
+  AdditionalText(tab: AdditionalText = AdditionalText.Other, data: string | null = null) {
+    if (data !== null) {
+      this.dataText = data;
     }
 
-  canBefore(): boolean {
-    return this.currentWeek() > 1;
+    switch (tab) {
+      case AdditionalText.Group:
+        this.additionalText = 'для группы';
+        break;
+      case AdditionalText.LectureHall:
+        this.additionalText = 'в аудитории';
+        break;
+      case AdditionalText.Professor:
+        this.additionalText = 'для преподавателя';
+        break;
+    }
+  }
+
+  protected canBefore(): boolean {
+    return this.currentWeek > 1;
   }
 
   protected readonly addDays = addDays;