同学的前端作业，大家觉得这代码什么水平？

[dfgxcvbcv]

import {Component, HostListener, OnInit} from '@angular/core';
import {MenuItem, MessageService} from "primeng/api";
import {HttpClient} from "@angular/common/http";
import {ActivatedRoute, ParamMap, Router} from "@angular/router";
import {CategoryForm} from "./category-form";

@Component({
  selector: 'app-articles-category-add-edit',
  templateUrl: './category-add-edit.component.html',
  providers: [MessageService]
})
export class CategoryAddEditComponent implements OnInit {
  apiUrl = "/api/Articles/Categories";

  loading = true;
  model = new CategoryForm("", "");
  home: MenuItem = {icon: 'pi pi-home', routerLink: '/admin/dashboard'};
  paths = [
    {label: '管理文章', routerLink: '/admin/articles'},
    {label: '新建文章分类'}
  ];
  categoryId?: string;
  invalidNameReason = "";
  pendingChanges = false;
  saving = false;

  constructor(private http: HttpClient,
              private messageService: MessageService,
              private route: ActivatedRoute, private router: Router) {
  }

  ngOnInit() {
    this.route.paramMap.subscribe((params: ParamMap) => {
      if (params.get('id') != "create") {
        this.categoryId = params.get('id');
        this.paths[1].label = "编辑文章分类 " + this.categoryId;
        this.http.get(this.apiUrl + this.categoryId).subscribe(data => {
          this.model = data as CategoryForm;
          this.loading = false;
        });
      } else this.loading = false;
    })
  }

  @HostListener('window:beforeunload')
  canDeactivate() {
    return !this.pendingChanges;
  }

  save() {
    if (this.saving) return;

    this.model.categoryName = this.model.categoryName.trim();
    if (this.model.categoryName.length == 0) {
      this.invalidNameReason = "分类名称不能为空。";
      return;
    }
    this.model.categoryNameEn = this.model.categoryNameEn.trim();
    this.saving = true;

    const url = this.categoryId ? `${this.apiUrl}/${this.categoryId}` : this.apiUrl;

    this.http[this.categoryId?"put":"post"](url, this.model).subscribe(
      () => {
        this.pendingChanges = false;
        this.router.navigate(['../../'], {relativeTo: this.route});
      },
      () => {
        this.messageService.add({severity: 'error', summary: '错误', detail: '保存失败。'});
        this.saving = false;
      }
    );
  }
}