6: Get Data from a Server

[examples/angular-tour-of-heroes] / src / app / hero.service.ts

diff --git a/src/app/hero.service.ts b/src/app/hero.service.ts
index 349d043..b794b8a 100644 (file)
--- a/src/app/hero.service.ts
+++ b/src/app/hero.service.ts
@@ -57,6 +57,20 @@ export class HeroService {
     );
   }
 
+  /* GET heroes whose name contains search term */
+  searchHeroes(term: string): Observable<Hero[]> {
+    if (!term.trim()) {
+      // if not search term, return empty hero array.
+      return of([]);
+    }
+    return this.http.get<Hero[]>(`${this.heroesUrl}/?name=${term}`).pipe(
+      tap(x => x.length ?
+        this.log(`found heroes matching "${term}"`) :
+        this.log(`no heroes matching "${term}"`)),
+      catchError(this.handleError<Hero[]>('searchHeroes', []))
+    );
+  }
+
   /**
    * Handle Http operation that failed.
    * Let the app continue.