feat: add saving of user's selection

src/components/common/tab-storage/tab-storage.component.ts

@@ -0,0 +1,83 @@
+import {MatChipListbox} from "@angular/material/chips";
+
+export class TabSelect {
+  public index: number;
+  public name: string;
+
+  constructor(index: number, name: string) {
+    this.index = index;
+    this.name = name;
+  }
+}
+
+export enum TabSelectType {
+  group,
+  professor,
+  lecture,
+  other
+}
+
+export interface TabSelectData {
+  selected: TabSelect[] | null;
+  type: TabSelectType;
+}
+
+export class TabStorageComponent {
+  private static dataName = 'tabSelectedData';
+
+  public static trySelectChip(index: number, chip: MatChipListbox, tryCount: number = 0) {
+    setTimeout(() => {
+      if (chip?._chips !== undefined && chip._chips.length !== 0) {
+        let selected = chip._chips.find(x => x.value == index.toString());
+        if (selected !== undefined) {
+          selected.select();
+          return;
+        }
+      }
+
+      if (tryCount >= 10)
+        return;
+
+      this.trySelectChip(index, chip, ++tryCount);
+    }, 100);
+  }
+
+  public static select(selected: TabSelect, type: TabSelectType, index: number) {
+    let selectedData = this.selected;
+
+    if (selectedData === null)
+      selectedData = {} as TabSelectData;
+
+    if (selectedData.type !== type || selectedData.selected === null || selectedData.selected.length === 0) {
+      if (index !== 0)
+        return;
+      else
+        selectedData.selected = [selected];
+    } else {
+      if (selectedData.selected.length < index)
+        return;
+
+      if (selectedData.selected.length - 1 === index)
+        selectedData.selected[index] = selected;
+      else if (selectedData.selected.length > index + 1)
+        selectedData.selected = selectedData.selected.slice(0, index + 1);
+      else
+        selectedData.selected.push(selected);
+    }
+
+    selectedData.type = type;
+
+    console.log(selectedData);
+
+    localStorage.setItem(this.dataName, JSON.stringify(selectedData));
+  }
+
+  public static get selected(): TabSelectData | null {
+    let data = localStorage.getItem(this.dataName);
+
+    if (data === null)
+      return null;
+
+    return JSON.parse(data) as TabSelectData;
+  }
+}

src/components/schedule/tabs/group/group.component.html

@@ -5,14 +5,16 @@
         Факультет
       </mat-panel-title>
     </mat-expansion-panel-header>
-    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseFaculty($event)">
+    <mat-chip-listbox hideSingleSelectionIndicator (change)="onFacultySelected($event.value)" #facultyChip>
       @for (faculty of faculties; track $index) {
         <mat-chip-option [value]="faculty.id" color="accent">
           {{ faculty.name }}
         </mat-chip-option>
-      } @empty {
+      }
-        <app-loading-indicator [loading]="facultiesLoaded !== null"
+      @if (faculties === null) {
-                               (retryFunction)="loadFaculties()"/>
+        <app-loading-indicator [loading]="true"
+                               (retryFunction)="loadFaculties()"
+                               #facultyIndicator/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>
@@ -23,14 +25,18 @@
         Курс
       </mat-panel-title>
     </mat-expansion-panel-header>
-    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseCourseNumber($event)" [formControl]="formChipCourse">
+    <mat-chip-listbox hideSingleSelectionIndicator (change)="onCourseSelected($event.value)"
+                      [formControl]="formChipCourse"
+                      #courseChip>
       @for (course of courseNumbers; track $index) {
         <mat-chip-option [value]="course" color="accent">
           {{ course }}
         </mat-chip-option>
-      } @empty {
+      }
-        <app-loading-indicator [loading]="groupsLoaded !== null"
+      @if (courseNumbers === null) {
-                               (retryFunction)="loadCourseGroup()"/>
+        <app-loading-indicator [loading]="true"
+                               (retryFunction)="loadCourseGroup()"
+                               #courseIndicator/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>
@@ -41,14 +47,18 @@
         Группа
       </mat-panel-title>
     </mat-expansion-panel-header>
-    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseGroup($event)" [formControl]="formChipGroup">
+    <mat-chip-listbox hideSingleSelectionIndicator (change)="onGroupSelected($event.value)"
+                      [formControl]="formChipGroup"
+                      #groupChip>
       @for (group of filteredGroups; track $index) {
         <mat-chip-option [value]="group.id" color="accent">
           {{ group.name }}
         </mat-chip-option>
-      } @empty {
+      }
-        <app-loading-indicator [loading]="groupsLoaded !== null"
+      @if (faculties === null) {
-                               (retryFunction)="loadCourseGroup()"/>
+        <app-loading-indicator [loading]="true"
+                               (retryFunction)="loadCourseGroup()"
+                               #groupIndicator/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>

src/components/schedule/tabs/group/group.component.ts

@@ -1,6 +1,6 @@
 import {Component, EventEmitter, Output, ViewChild} from '@angular/core';
 import {MatExpansionModule, MatExpansionPanel} from "@angular/material/expansion";
-import {MatChipListboxChange, MatChipsModule} from '@angular/material/chips';
+import {MatChipListbox, MatChipsModule} from '@angular/material/chips';
 import {FormControl, FormsModule, ReactiveFormsModule} from "@angular/forms";
 import {catchError} from "rxjs";
 import {LoadingIndicatorComponent} from "@component/common/loading-indicator/loading-indicator.component";
@@ -8,6 +8,12 @@ import {GroupResponse} from "@api/v1/groupResponse";
 import {FacultyResponse} from "@api/v1/facultyResponse";
 import {FacultyService} from "@api/v1/faculty.service";
 import {GroupService} from "@api/v1/group.service";
+import {IScheduleTab} from "@component/schedule/tabs/ischedule-tab";
+import {
+  TabSelect,
+  TabSelectType,
+  TabStorageComponent
+} from "@component/common/tab-storage/tab-storage.component";
 
 @Component({
   selector: 'app-group',
@@ -24,121 +30,159 @@ import {GroupService} from "@api/v1/group.service";
   providers: [FacultyService, GroupService]
 })
 
-export class GroupComponent {
+export class GroupComponent implements IScheduleTab {
+  protected faculties: FacultyResponse[] | null = null;
+  protected courseNumbers: number[] | null = null;
+  private groups: GroupResponse[] | null = null;
+  protected filteredGroups: GroupResponse[] | null = [];
+
   protected facultyId: number | null = null;
   protected courseNumber: number | null = null;
 
-  protected filteredGroups: GroupResponse[] = [];
-  protected courseNumbers: number[] = [];
-  private groups: GroupResponse[] = [];
-
   protected formChipCourse: FormControl = new FormControl();
   protected formChipGroup: FormControl = new FormControl();
 
-  protected faculties: FacultyResponse[] = [];
-
   @ViewChild('courseNumberPanel') courseNumberPanel!: MatExpansionPanel;
   @ViewChild('groupPanel') groupPanel!: MatExpansionPanel;
 
-  protected facultiesLoaded: boolean | null = false;
+  @ViewChild('facultyChip') facultyChip!: MatChipListbox;
-  protected groupsLoaded: boolean | null = false;
+  @ViewChild('courseChip') courseChip!: MatChipListbox;
+  @ViewChild('groupChip') groupChip!: MatChipListbox;
+
+  private readonly selected: TabSelect[] | null = null;
+
+  @ViewChild('facultyIndicator') facultyIndicator!: LoadingIndicatorComponent;
+  @ViewChild('courseIndicator') courseIndicator!: LoadingIndicatorComponent;
+  @ViewChild('groupIndicator') groupIndicator!: LoadingIndicatorComponent;
 
   @Output() eventResult = new EventEmitter<number>();
 
   constructor(private facultyApi: FacultyService, private groupApi: GroupService) {
-    this.loadFaculties();
+    let selectedData = TabStorageComponent.selected;
+    if (selectedData !== null && selectedData.selected !== null) {
+      if (selectedData.type === TabSelectType.group)
+        this.selected = selectedData.selected;
+    }
   }
 
   protected loadFaculties() {
-    this.facultiesLoaded = false;
     this.facultyApi.getFaculties()
       .pipe(catchError(error => {
-        this.facultiesLoaded = null;
+        this.facultyIndicator.loading = false;
         throw error;
       }))
       .subscribe(data => {
         this.faculties = data;
-        this.facultiesLoaded = true;
+        if (this.selected !== null && this.selected.length >= 1) {
+          let selectedFaculty = data.find(x => x.id === this.selected![0].index);
+
+          if (selectedFaculty === undefined || selectedFaculty.name !== this.selected[0].name)
+            selectedFaculty = data.find(x => x.name === this.selected![0].name);
+
+          if (selectedFaculty !== undefined) {
+            TabStorageComponent.trySelectChip(selectedFaculty.id, this.facultyChip);
+            this.onFacultySelected(selectedFaculty.id);
+          }
+        }
       });
   }
 
-  private filteringCourseNumber() {
-    this.courseNumbers = Array.from(
-      new Set(
-        this.groups
-          .filter(x => x.facultyId === this.facultyId)
-          .map(x => x.courseNumber)
-      )
-    ).sort((a, b) => a - b);
-  }
-
-  private filteringGroup() {
-    this.filteredGroups = this.groups.filter(x => x.facultyId === this.facultyId && x.courseNumber === this.courseNumber);
-  }
-
   protected loadCourseGroup() {
-    if (this.groups.length === 0) {
+    if (this.facultyId === null)
-      this.groupsLoaded = false;
+      return;
 
-      this.groupApi.getGroups().pipe(
+    if (this.groups === null || this.groups.length === 0 || this.groups[0].facultyId !== this.facultyId) {
-        catchError(error => {
+      this.groupApi.getByFaculty(this.facultyId)
-          this.groupsLoaded = null;
+        .pipe(catchError(error => {
+          this.groupIndicator.loading = false;
+          this.courseIndicator.loading = false;
           throw error;
-        })
+        }))
-      ).subscribe(data => {
+        .subscribe(data => {
-        this.groups = data;
+          this.groups = data;
-        if (this.courseNumber === null)
+          this.courseNumbers = Array.from(
-          this.filteringCourseNumber();
+            new Set(
-        else
+              this.groups!
-          this.filteringGroup();
+                .map(x => x.courseNumber)
+                .sort((a, b) => a - b))
+          );
 
-        this.groupsLoaded = true;
+          if (this.selected !== null && this.selected.length >= 2) {
-      });
+            let selectedCourse = this.courseNumbers.find(x => x === this.selected![1].index);
 
-      return
+            if (selectedCourse !== undefined) {
+              TabStorageComponent.trySelectChip(selectedCourse, this.courseChip);
+              this.onCourseSelected(selectedCourse);
+            }
+          }
+
+          if (this.selected !== null && this.selected.length >= 3) {
+            let selectedGroup = data.find(x => x.id === this.selected![2].index);
+
+            if (selectedGroup === undefined || selectedGroup.name !== this.selected[2].name)
+              selectedGroup = data.find(x => x.name === this.selected![2].name);
+
+            if (selectedGroup !== undefined) {
+              TabStorageComponent.trySelectChip(selectedGroup.id, this.groupChip);
+              this.onGroupSelected(selectedGroup.id);
+            }
+          }
+        });
+
+      return;
     }
 
-    if (this.courseNumber === null)
+    if (this.courseNumber !== null)
-      this.filteringCourseNumber();
+      this.filteredGroups = this.groups!.filter(x => x.courseNumber === this.courseNumber);
-    else
-      this.filteringGroup();
   }
 
-  protected chooseFaculty(event: MatChipListboxChange) {
+  protected onFacultySelected(index: number) {
     this.courseNumber = null;
     this.groups = [];
     this.formChipGroup.reset();
     this.formChipCourse.reset();
 
-    if (event.value === undefined || event.value === null) {
+    if (index === undefined) {
       this.facultyId = null;
       return;
     }
-    this.facultyId = event.value;
+
+    TabStorageComponent.select(new TabSelect(index, this.faculties!.find(x => x.id === index)?.name ?? ''), TabSelectType.group, 0);
+
+    this.facultyId = index;
     this.courseNumberPanel.open();
 
     this.loadCourseGroup();
   }
 
-  protected chooseCourseNumber(event: MatChipListboxChange) {
+  protected onCourseSelected(course: number) {
     this.filteredGroups = [];
     this.formChipGroup.reset();
 
-    if (event.value === undefined || event.value === null) {
+    if (course === undefined) {
       this.courseNumber = null;
       return;
     }
 
-    this.courseNumber = event.value;
+    TabStorageComponent.select(new TabSelect(course, course.toString()), TabSelectType.group, 1);
+
+    this.courseNumber = course;
     this.groupPanel.open();
     this.loadCourseGroup();
   }
 
-  protected chooseGroup(event: MatChipListboxChange) {
+  protected onGroupSelected(index: number) {
-    if (event.value === undefined || event.value === null)
+    if (index === undefined)
       return;
 
+    TabStorageComponent.select(new TabSelect(index, this.groups!.find(x => x.id == index)?.name ?? ''), TabSelectType.group, 2);
+
     this.groupPanel.close();
-    this.eventResult.emit(event.value);
+    this.eventResult.emit(index);
+  }
+
+  public load() {
+    if (this.faculties === null)
+      this.loadFaculties();
   }
 }

src/components/schedule/tabs/ischedule-tab.ts

@@ -0,0 +1,6 @@
+import {EventEmitter} from "@angular/core";
+
+export interface IScheduleTab {
+  load(): void;
+  eventResult: EventEmitter<number>;
+}

src/components/schedule/tabs/lecture-hall/lecture-hall.component.html

@@ -5,13 +5,14 @@
         Кампус
       </mat-panel-title>
     </mat-expansion-panel-header>
-    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseCampus($event)">
+    <mat-chip-listbox hideSingleSelectionIndicator (change)="onCampusSelected($event.value)" #campusChip>
       @for (campus of campuses; track $index) {
         <mat-chip-option [value]="campus.id" color="accent">
           {{ campus.codeName }}
         </mat-chip-option>
-      } @empty {
+      }
-        <app-loading-indicator [loading]="campusesLoaded !== null" (retryFunction)="loadCampuses()"/>
+      @if (campuses === null) {
+        <app-loading-indicator [loading]="true" (retryFunction)="loadCampuses()" #campusIndicator/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>
@@ -22,13 +23,14 @@
         Кабинет
       </mat-panel-title>
     </mat-expansion-panel-header>
-    <mat-chip-listbox hideSingleSelectionIndicator (change)="chooseLectureHall($event)" [formControl]="chipLecture">
+    <mat-chip-listbox hideSingleSelectionIndicator (change)="onLectureHallSelected($event.value)" [formControl]="formLectureHalls" #lectureChip>
       @for (lectureHall of lectureHallsFiltered; track $index) {
         <mat-chip-option [value]="lectureHall.id" color="accent">
           {{ lectureHall.name }}
         </mat-chip-option>
-      } @empty {
+      }
-        <app-loading-indicator [loading]="lectureHallsLoaded !== null" (retryFunction)="loadLectureHalls()"/>
+      @if (lectureHallsFiltered === null) {
+        <app-loading-indicator [loading]="true" (retryFunction)="loadLectureHalls()" #lectureIndicator/>
       }
     </mat-chip-listbox>
   </mat-expansion-panel>

src/components/schedule/tabs/lecture-hall/lecture-hall.component.ts

@@ -1,14 +1,16 @@
-import {Component, EventEmitter, Input, Output, ViewChild} from '@angular/core';
+import {Component, EventEmitter, Output, ViewChild} from '@angular/core';
 import {AsyncPipe} from "@angular/common";
 import {MatAccordion, MatExpansionModule, MatExpansionPanel} from "@angular/material/expansion";
-import {MatChipListboxChange, MatChipsModule} from "@angular/material/chips";
+import {MatChipListbox, MatChipsModule} from "@angular/material/chips";
-import {catchError, Observable, of} from "rxjs";
+import {catchError} from "rxjs";
 import {FormControl, ReactiveFormsModule} from "@angular/forms";
 import {LoadingIndicatorComponent} from "@component/common/loading-indicator/loading-indicator.component";
 import {CampusBasicInfoResponse} from "@api/v1/campusBasicInfoResponse";
 import {LectureHallResponse} from "@api/v1/lectureHallResponse";
 import {CampusService} from "@api/v1/campus.service";
 import {LectureHallService} from "@api/v1/lectureHall.service";
+import {IScheduleTab} from "@component/schedule/tabs/ischedule-tab";
+import {TabSelect, TabSelectType, TabStorageComponent} from "@component/common/tab-storage/tab-storage.component";
 
 @Component({
   selector: 'app-lecture-hall',
@@ -26,79 +28,115 @@ import {LectureHallService} from "@api/v1/lectureHall.service";
   providers: [CampusService, LectureHallService]
 })
 
-export class LectureHallComponent {
+export class LectureHallComponent implements IScheduleTab {
   protected campusId: number | null = null;
-  protected chipLecture: FormControl = new FormControl();
+  protected formLectureHalls: FormControl = new FormControl();
 
-  @ViewChild('lecturePanel') lecturePanel!: MatExpansionPanel;
+  protected campuses: CampusBasicInfoResponse[] | null = null;
-
+  protected lectureHallsFiltered: LectureHallResponse[] | null = null;
-  protected campuses: CampusBasicInfoResponse[] = [];
-  protected campusesLoaded: boolean | null = false;
-
-  private lectureHalls: LectureHallResponse[] = [];
-  protected lectureHallsFiltered: LectureHallResponse[] = [];
-  protected lectureHallsLoaded: boolean | null = false;
 
   @Output() eventResult = new EventEmitter<number>();
 
+  @ViewChild('lecturePanel') lecturePanel!: MatExpansionPanel;
+  @ViewChild('lectureIndicator') lectureIndicator!: LoadingIndicatorComponent;
+  @ViewChild('campusIndicator') campusIndicator!: LoadingIndicatorComponent;
+
+  @ViewChild('campusChip') campusChip!: MatChipListbox;
+  @ViewChild('lectureChip') lectureChip!: MatChipListbox;
+
+  private lectureHalls: LectureHallResponse[] | null = null;
+  private readonly selected: TabSelect[] | null = null;
+
   constructor(private campusApi: CampusService, private lectureHallApi: LectureHallService) {
-    this.loadCampuses();
+    let selectedData = TabStorageComponent.selected;
+    if (selectedData !== null && selectedData.selected !== null) {
+      if (selectedData.type === TabSelectType.lecture)
+        this.selected = selectedData.selected;
+    }
   }
 
   protected loadCampuses() {
-    this.campusesLoaded = false;
     this.campusApi.getCampus()
       .pipe(catchError(error => {
-        this.campusesLoaded = null;
+        this.campusIndicator.loading = false;
         throw error;
       }))
       .subscribe(data => {
         this.campuses = data;
-        this.campusesLoaded = true;
+
+        if (this.selected !== null && this.selected.length >= 1) {
+          let selectedCampus = data.find(x => x.id === this.selected![0].index);
+
+          if (selectedCampus === undefined || selectedCampus.codeName !== this.selected![0].name)
+            selectedCampus = data.find(x => x.codeName === this.selected![0].name);
+
+          if (selectedCampus !== undefined) {
+            TabStorageComponent.trySelectChip(selectedCampus.id, this.campusChip);
+            this.onCampusSelected(selectedCampus.id);
+          }
+        }
       });
   }
 
   private filteringLectureHalls() {
-    this.lectureHallsFiltered = this.lectureHalls.filter(x => x.campusId === this.campusId);
+    this.lectureHallsFiltered = this.lectureHalls?.filter(x => x.campusId === this.campusId) ?? null;
   }
 
-  protected chooseCampus(event: MatChipListboxChange) {
+  protected onCampusSelected(index: number) {
-    this.chipLecture.reset();
+    this.formLectureHalls.reset();
 
-    if (event.value === undefined || event.value === null) {
+    TabStorageComponent.select(new TabSelect(index, this.campuses!.find(x => x.id === index)?.codeName ?? ''), TabSelectType.lecture, 0);
+
+    if (index === undefined) {
       this.campusId = null;
       this.lectureHalls = [];
       return;
     }
 
-    this.campusId = event.value;
+    this.campusId = index;
     this.lecturePanel.open();
 
-    if (this.lectureHalls.length === 0)
+    if (this.lectureHalls === null)
       this.loadLectureHalls();
     else
       this.filteringLectureHalls();
   }
 
   protected loadLectureHalls() {
-    this.lectureHallsLoaded = false;
     this.lectureHallApi.getLectureHalls()
       .pipe(catchError(error => {
-        this.lectureHallsLoaded = null;
+        this.lectureIndicator.loading = false;
         throw error;
       }))
       .subscribe(data => {
         this.lectureHalls = data;
         this.filteringLectureHalls();
-        this.lectureHallsLoaded = true;
+        if (this.selected !== null && this.selected.length >= 2) {
+          let selectedLecture = data.find(x => x.id === this.selected![1].index);
+
+          if (selectedLecture === undefined || selectedLecture.name !== this.selected![1].name)
+            selectedLecture = data.find(x => x.name === this.selected![1].name);
+
+          if (selectedLecture !== undefined) {
+            TabStorageComponent.trySelectChip(selectedLecture.id, this.lectureChip);
+            this.onLectureHallSelected(selectedLecture.id);
+          }
+        }
       });
   }
 
-  protected chooseLectureHall(event: MatChipListboxChange) {
+  protected onLectureHallSelected(index: number) {
-    if (event.value === undefined || event.value === null)
+    if (index === undefined)
       return;
 
+    TabStorageComponent.select(new TabSelect(index, this.lectureHallsFiltered!.find(x => x.id === index)?.name ?? ''), TabSelectType.lecture, 1);
+
     this.lecturePanel.close();
-    this.eventResult.emit(event.value);
+    this.eventResult.emit(index);
+  }
+
+  public load() {
+    if (this.campuses === null)
+      this.loadCampuses();
   }
 }

src/components/schedule/tabs/professor/professor.component.html

@@ -1,11 +1,12 @@
 <div class="search-content">
-  @if (professors.length === 0) {
+  @if (professors === null) {
-    <app-loading-indicator [loading]="professorsLoaded !== null" (retryFunction)="loadProfessors()"/>
+    <app-loading-indicator [loading]="true" (retryFunction)="loadProfessors()"
+                           #professorIndicator/>
   } @else {
     <mat-form-field color="accent" style="width: 100%;">
       <input type="text" placeholder="Поиск..." matInput [formControl]="professorControl" [matAutocomplete]="auto">
 
-      <mat-autocomplete #auto="matAutocomplete" (optionSelected)="onOptionSelected($event)"
+      <mat-autocomplete #auto="matAutocomplete" (optionSelected)="onOptionSelected($event.option.value)"
                         [autoActiveFirstOption]="false" [hideSingleSelectionIndicator]="true">
         @for (option of filteredProfessors | async; track option) {
           <mat-option [value]="option.id">

src/components/schedule/tabs/professor/professor.component.ts

@@ -1,12 +1,14 @@
-import {Component, EventEmitter, Input, OnInit, Output} from "@angular/core";
+import {Component, EventEmitter, OnInit, Output, ViewChild} from "@angular/core";
 import {MatFormField, MatInput} from "@angular/material/input";
 import {FormControl, ReactiveFormsModule} from "@angular/forms";
-import {MatAutocompleteModule, MatAutocompleteSelectedEvent} from "@angular/material/autocomplete";
+import {MatAutocompleteModule} from "@angular/material/autocomplete";
 import {AsyncPipe} from "@angular/common";
 import {catchError, map, Observable, startWith} from "rxjs";
 import {LoadingIndicatorComponent} from "@component/common/loading-indicator/loading-indicator.component";
 import {ProfessorResponse} from "@api/v1/professorResponse";
 import {ProfessorService} from "@api/v1/professor.service";
+import {IScheduleTab} from "@component/schedule/tabs/ischedule-tab";
+import {TabSelect, TabSelectType, TabStorageComponent} from "@component/common/tab-storage/tab-storage.component";
 
 @Component({
   selector: 'app-professor',
@@ -23,31 +25,44 @@ import {ProfessorService} from "@api/v1/professor.service";
   styleUrl: './professor.component.css',
   providers: [ProfessorService]
 })
-export class ProfessorComponent implements OnInit {
+export class ProfessorComponent implements OnInit, IScheduleTab {
   protected professorControl = new FormControl();
   protected filteredProfessors!: Observable<ProfessorResponse[]>;
 
-  protected professors: ProfessorResponse[] = [];
+  protected professors: ProfessorResponse[] | null = null;
-  protected professorsLoaded: boolean | null = false;
+  private readonly selected: TabSelect[] | null = null;
+
+  @ViewChild('professorIndicator') professorIndicator!: LoadingIndicatorComponent;
 
   @Output() eventResult = new EventEmitter<number>();
 
   constructor(private api: ProfessorService) {
-    this.loadProfessors();
+    let selectedData = TabStorageComponent.selected;
+    if (selectedData !== null && selectedData.selected !== null) {
+      if (selectedData.type === TabSelectType.professor)
+        this.selected = selectedData.selected;
+    }
   }
 
   protected loadProfessors() {
-    if (this.professors.length === 0) {
+    if (this.professors === null || this.professors.length === 0) {
-      this.professorsLoaded = false;
-
       this.api.getProfessors()
         .pipe(catchError(error => {
-          this.professorsLoaded = null;
+          this.professorIndicator.loading = false;
           throw error;
         }))
         .subscribe(data => {
           this.professors = data;
-          this.professorsLoaded = true;
+
+          if (this.selected !== null && this.selected.length >= 1) {
+            let selectedProfessor = data.find(x => x.id === this.selected![0].index);
+
+            if (selectedProfessor === undefined || selectedProfessor.name !== this.selected[0].name)
+              selectedProfessor = data.find(x => x.name === this.selected![0].name);
+
+            if (selectedProfessor !== undefined)
+              this.onOptionSelected(selectedProfessor.id);
+          }
         });
     }
   }
@@ -61,20 +76,32 @@ export class ProfessorComponent implements OnInit {
 
   private _filterProfessors(value: string | number): ProfessorResponse[] {
     if (typeof value === 'string') {
-      if (value === '') return [];
+      if (value === '')
+        return [];
+
       const filterValue = value.toLowerCase();
-      return this.professors.filter(teacher => teacher.name.toLowerCase().includes(filterValue));
+      return this.professors?.filter(teacher => teacher.name.toLowerCase().includes(filterValue)) ?? [];
     } else {
-      const selectedTeacher = this.professors.find(teacher => teacher.id === value);
+      const selectedTeacher = this.professors?.find(teacher => teacher.id === value);
       return selectedTeacher ? [selectedTeacher] : [];
     }
   }
 
-  protected onOptionSelected(event: MatAutocompleteSelectedEvent) {
+  protected onOptionSelected(index: number) {
-    const selectedOption = this.professors.find(teacher => teacher.id === event.option.value);
+    if (index === undefined)
+      return;
+
+    const selectedOption = this.professors?.find(teacher => teacher.id === index);
     if (selectedOption) {
       this.professorControl.setValue(selectedOption.name);
       this.eventResult.emit(selectedOption.id);
+
+      TabStorageComponent.select(new TabSelect(selectedOption.id, selectedOption.name), TabSelectType.professor, 0);
     }
   }
+
+  public load() {
+    if (this.professors === null)
+      this.loadProfessors();
+  }
 }

src/components/schedule/tabs/tabs.component.ts

@@ -1,8 +1,8 @@
-import {Component, EventEmitter, Output} from '@angular/core';
+import {AfterViewInit, Component, EventEmitter, Output, ViewChild} from '@angular/core';
-import {OtherComponent} from "@component/schedule/tabs/other/other.component";
+import {OtherComponent, SelectData} from "@component/schedule/tabs/other/other.component";
-import {MatTab, MatTabChangeEvent, MatTabGroup} from "@angular/material/tabs";
+import {MatTab, MatTabGroup} from "@angular/material/tabs";
 import {map, Observable} from "rxjs";
-import {ReactiveFormsModule} from "@angular/forms";
+import {FormsModule, ReactiveFormsModule} from "@angular/forms";
 import {MatButton} from "@angular/material/button";
 import {DataSpinnerComponent} from "@component/common/data-spinner/data-spinner.component";
 import {GroupComponent} from "@component/schedule/tabs/group/group.component";
@@ -10,6 +10,14 @@ import {ProfessorComponent} from "@component/schedule/tabs/professor/professor.c
 import {LectureHallComponent} from "@component/schedule/tabs/lecture-hall/lecture-hall.component";
 import {ScheduleService} from "@api/v1/schedule.service";
 import {ScheduleResponse} from "@api/v1/scheduleResponse";
+import {IScheduleTab} from "@component/schedule/tabs/ischedule-tab";
+import {DisciplineService} from "@api/v1/discipline.service";
+import {LectureHallService} from "@api/v1/lectureHall.service";
+import {GroupService} from "@api/v1/group.service";
+import {ProfessorService} from "@api/v1/professor.service";
+import {AuthRoles} from "@model/AuthRoles";
+import {HasRoleDirective} from "@/directives/has-role.directive";
+import {TabStorageComponent} from "@component/common/tab-storage/tab-storage.component";
 
 export enum TabsSelect {
   Group,
@@ -30,17 +38,34 @@ export enum TabsSelect {
     DataSpinnerComponent,
     GroupComponent,
     ProfessorComponent,
-    LectureHallComponent
+    LectureHallComponent,
+    FormsModule,
+    HasRoleDirective
   ],
   templateUrl: './tabs.component.html',
   styleUrl: './tabs.component.css',
-  providers: [ScheduleService]
+  providers: [ScheduleService, DisciplineService, LectureHallService, GroupService, ProfessorService]
 })
 
-export class TabsComponent {
+export class TabsComponent implements AfterViewInit {
   @Output() eventResult = new EventEmitter<[TabsSelect, number, Observable<ScheduleResponse[]>]>();
 
-  constructor(private scheduleApi: ScheduleService) {
+  constructor(private scheduleApi: ScheduleService,
+              private disciplineApi: DisciplineService,
+              private lectureApi: LectureHallService,
+              private groupApi: GroupService,
+              private professorApi: ProfessorService) {
+  }
+
+  ngAfterViewInit(): void {
+    let selected = TabStorageComponent.selected;
+
+    let index = 0;
+    if (selected !== null)
+      index = selected.type;
+
+    this.chooseTabs(index).then();
+    this.tabs.selectedIndex = index;
   }
 
   protected groupSelected(id: number) {
@@ -145,15 +170,74 @@ export class TabsComponent {
     );
   }
 
-  protected async chooseTabs(event: MatTabChangeEvent) {
+  protected async chooseTabs(index: number) {
-    switch (event.index) {
+    switch (index) {
+      case 0:
+        this.groupTab.load();
+        break;
+      case 1:
+        this.professorTab.load();
+        break;
+      case 2:
+        this.lectureHallTab.load();
+        break;
+      case 3:
+        await this.loadDisciplines();
+        await this.loadLectureHalls();
+        await this.loadGroups();
+        await this.loadProfessors();
+        break;
+      default:
+        await this.chooseTabs(0);
+        break;
     }
   }
 
-  /*
+  protected async loadDisciplines() {
+    this.disciplineApi.getDisciplines().subscribe(data => {
+      this.disciplineEx.Data = data.map(x => ({
+        id: x.id,
+        name: x.name
+      }) as SelectData);
+    });
+  }
+
+  protected async loadLectureHalls() {
+    this.lectureApi.getLectureHalls().subscribe(data => {
+      this.lectureHallEx.Data = data.map(x => ({
+        id: x.id,
+        name: x.name
+      }) as SelectData);
+    });
+  }
+
+  protected async loadGroups() {
+    this.groupApi.getGroups().subscribe(data => {
+      this.groupEx.Data = data.map(x => ({
+        id: x.id,
+        name: x.name
+      }) as SelectData);
+    });
+  }
+
+  protected async loadProfessors() {
+    this.professorApi.getProfessors().subscribe(data => {
+      this.professorEx.Data = data.map(x => ({
+        id: x.id,
+        name: x.name
+      }) as SelectData);
+    });
+  }
+
+  @ViewChild('groupTab') groupTab!: IScheduleTab;
+  @ViewChild('professorTab') professorTab!: IScheduleTab;
+  @ViewChild('lectureHallTab') lectureHallTab!: IScheduleTab;
+
   @ViewChild('discipline') disciplineEx!: OtherComponent;
   @ViewChild('lecture') lectureHallEx!: OtherComponent;
   @ViewChild('group') groupEx!: OtherComponent;
   @ViewChild('professor') professorEx!: OtherComponent;
-   */
+
+  @ViewChild('tabGroup') tabs!: MatTabGroup;
+  protected readonly AuthRoles = AuthRoles;
 }

src/pages/schedule/schedule.component.ts

@@ -70,8 +70,6 @@ export class ScheduleComponent {
             break;
           case TabsSelect.Professor:
             let indexProfessor = this.data[0].professorsId.findIndex(p => p === data[1]);
-            console.log(indexProfessor);
-            console.log(data[1]);
             this.childComponent.AdditionalText(AdditionalText.Professor, this.data[0].professors[indexProfessor]);
             break;
           case TabsSelect.LectureHall: