search engien

src/app/features/search/services/search-history.service.ts

@@ -0,0 +1,47 @@
+import { Injectable, inject } from '@angular/core';
+import { AuthService } from '../../../services/auth.service';
+import { SearchHistory } from '../models/search.model';
+import { BackendSearchHistoryRepository, LocalSearchHistoryRepository, SearchHistoryRepository } from './search-history.repository';
+
+@Injectable({ providedIn: 'root' })
+export class SearchHistoryService {
+  private readonly authService = inject(AuthService);
+  private readonly localRepository = inject(LocalSearchHistoryRepository);
+  private readonly backendRepository = inject(BackendSearchHistoryRepository);
+
+  private readonly maxSize = 12;
+
+  private get repository(): SearchHistoryRepository {
+    return this.authService.session() ? this.backendRepository : this.localRepository;
+  }
+
+  getSnapshot(): SearchHistory {
+    const items = this.repository.load();
+    return {
+      items,
+      recent: items.slice(0, 8),
+    };
+  }
+
+  push(query: string, maxHistory = this.maxSize): SearchHistory {
+    const normalized = query.trim();
+    if (!normalized.length) {
+      return this.getSnapshot();
+    }
+
+    const existing = this.repository.load();
+    const next = [normalized, ...existing.filter(item => item.toLowerCase() !== normalized.toLowerCase())]
+      .slice(0, Math.max(1, maxHistory));
+
+    this.repository.save(next);
+    return {
+      items: next,
+      recent: next.slice(0, 8),
+    };
+  }
+
+  clear(): SearchHistory {
+    this.repository.clear();
+    return { items: [], recent: [] };
+  }
+}