InfiniteScroll and Layer list filter

Frontend/src/app/modules/layers/layers-list/layers-list.component.ts

@@ -1,5 +1,5 @@
 import { HttpClient } from '@angular/common/http';
-import { Component, HostListener, OnInit } from '@angular/core';
+import { Component, OnInit } from '@angular/core';
 import { MatSortModule } from '@angular/material/sort';
 import { MatTableModule } from '@angular/material/table';
 import { Layer, LayerType } from 'src/app/models/layer.model';
@@ -12,7 +12,9 @@ import { MatSelectModule } from '@angular/material/select';
 import { FormsModule } from '@angular/forms';
 import { MatChipsModule} from '@angular/material/chips';
 import { MatIconModule } from '@angular/material/icon';
-import { NgFor } from '@angular/common';
+import { KeyValuePipe, NgFor } from '@angular/common';
+import { ScrollEndDirective } from 'src/app/directives/scroll-end.directive';
+import { Subject, debounceTime, distinctUntilChanged } from 'rxjs';
 
 @Component({
     selector: 'diunabi-layers-list',
@@ -21,7 +23,7 @@ import { NgFor } from '@angular/common';
     standalone: true,
     imports: [MatGridListModule, MatButtonModule, RouterLink, MatFormFieldModule, 
       MatInputModule, MatTableModule, MatSortModule, MatSelectModule, FormsModule,
-      MatChipsModule, MatIconModule, NgFor]
+      MatChipsModule, MatIconModule, NgFor, ScrollEndDirective, KeyValuePipe]
 })
 export class LayersListComponent implements OnInit {
   displayedColumns = ['number', 'name', 'type'];
@@ -33,51 +35,36 @@ export class LayersListComponent implements OnInit {
   end: number = this.limit + this.start;
   loadingInProgress = false;
 
-  type = "";
-  codes: string[] = [];
+  type: LayerType | '' = '';
+  name: string = '';
+  nameUpdate = new Subject<string>();
 
   constructor(
     private _http: HttpClient,
   ) { }
 
-  //@HostListener('document:scroll', ['$event'])
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  public async  onScroll(event: any) {
-    console.log('on scrool', event);
-    if (event.target.offsetHeight + event.target.scrollTop >= event.target.scrollHeight - 1 && !this.loadingInProgress) {
-      this.loadingInProgress = true;
-      this.dataSource = await Layer.getList(this._http, this.start, this.limit, this.codes);
-      this.start = this.end;
-      this.end = this.limit + this.start;
-      setTimeout(() => {
-        this.loadingInProgress = false;
-      }, 500);
-    }
-  }
   async ngOnInit() {
-    this.dataSource = await Layer.getList(this._http, this.start, this.limit, this.codes);
+    this.nameUpdate.pipe(
+      debounceTime(400),
+      distinctUntilChanged())
+      .subscribe(() => {
+        this.loadList();
+      });
+      await this.loadList();
+  }
+
+  async loadList() {
+    this.start = 0;
+    this.end = this.limit;
+    this.dataSource = await Layer.getList(this._http, this.start, this.limit, this.name, this.type);
+  }
+ 
+  async loadMore() {
     this.start = this.end;
-    this.end = this.limit + this.start;
-  }
-  async removeCode(code: string) {
-    const index = this.codes.indexOf(code);
-    if (index >= 0) {
-      this.start = 0;
-      this.end = this.limit + this.start;
-      this.codes.splice(index, 1);
-      this.dataSource = await Layer.getList(this._http, this.start, this.limit, this.codes);
-    }
-  }
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  async addCode(event: any) {
-    const value = (event.target.value || '').trim();
-    if (value) {
-      this.start = 0;
-      this.end = this.limit + this.start;
-      this.codes.push(value);
-      this.dataSource = await Layer.getList(this._http, this.start, this.limit, this.codes);
-    }
-    event.target.value = '';
+    this.end += this.limit;
+    this.dataSource = this.dataSource.concat(
+      await Layer.getList(this._http, this.start, this.limit, this.name, this.type)
+      );
   }
 }