feat: add Master Admin application functionality

src/app/features/global-masters/states/data-access/state.service.ts

@@ -0,0 +1,45 @@
+import { HttpClient, HttpParams } from "@angular/common/http";
+import { Injectable, inject } from "@angular/core";
+import { STATE_ENDPOINTS } from "./state.endpoints"
+import { Observable } from "rxjs";
+import { DataTableQuery, DataTableResult } from "../../../../shared/components/data-table/data-table.types";
+import {
+  CreateStateRequest,
+  StateDto,
+  StateLookupDto,
+  UpdateStateRequest
+} from "../models/state.model";
+
+@Injectable({
+  providedIn: 'root'
+})
+export class StateService {
+
+    private readonly http = inject(HttpClient);
+
+    getStateDataTable(query: DataTableQuery, countryId: string | null = null): Observable<DataTableResult<StateDto>> {
+        const params = countryId ? new HttpParams().set('countryId', countryId) : undefined;
+        return this.http.post<DataTableResult<StateDto>>(`${STATE_ENDPOINTS.dataTable}`, query, { params });
+    }
+
+    createState(request: CreateStateRequest): Observable<StateDto> {
+        return this.http.post<StateDto>(STATE_ENDPOINTS.create, request);
+    }
+
+    updateState(id: string, request: UpdateStateRequest): Observable<StateDto> {
+        return this.http.put<StateDto>(STATE_ENDPOINTS.update(id), request);
+    }
+
+    getStateById(id: string): Observable<StateDto> {
+        return this.http.get<StateDto>(STATE_ENDPOINTS.getById(id));
+    }
+
+    autocomplete(countryId: string, term = '', limit = 50): Observable<StateLookupDto[]> {
+        return this.http.get<StateLookupDto[]>(STATE_ENDPOINTS.autocomplete, {
+            params: new HttpParams()
+                .set('countryId', countryId)
+                .set('term', term)
+                .set('limit', limit)
+        });
+    }
+}