1 files changed, 82 insertions, 0 deletions
diff --git a/src/pybind/mgr/dashboard/frontend/src/app/shared/api/rgw-daemon.service.ts b/src/pybind/mgr/dashboard/frontend/src/app/shared/api/rgw-daemon.service.ts
new file mode 100644
index 000000000..5c513c7f1
--- /dev/null
+++ b/src/pybind/mgr/dashboard/frontend/src/app/shared/api/rgw-daemon.service.ts
@@ -0,0 +1,82 @@
+import { HttpClient, HttpParams } from '@angular/common/http';
+import { Injectable } from '@angular/core';
+
+import _ from 'lodash';
+import { BehaviorSubject, Observable, of, throwError } from 'rxjs';
+import { mergeMap, take, tap } from 'rxjs/operators';
+
+import { RgwDaemon } from '~/app/ceph/rgw/models/rgw-daemon';
+import { cdEncode } from '~/app/shared/decorators/cd-encode';
+
+@cdEncode
+@Injectable({
+  providedIn: 'root'
+})
+export class RgwDaemonService {
+  private url = 'api/rgw/daemon';
+  private daemons = new BehaviorSubject<RgwDaemon[]>([]);
+  daemons$ = this.daemons.asObservable();
+  private selectedDaemon = new BehaviorSubject<RgwDaemon>(null);
+  selectedDaemon$ = this.selectedDaemon.asObservable();
+
+  constructor(private http: HttpClient) {}
+
+  list(): Observable<RgwDaemon[]> {
+    return this.http.get<RgwDaemon[]>(this.url).pipe(
+      tap((daemons: RgwDaemon[]) => {
+        this.daemons.next(daemons);
+        const selectedDaemon = this.selectedDaemon.getValue();
+        // Set or re-select the default daemon if the current one is not
+        // in the list anymore.
+        if (_.isEmpty(selectedDaemon) || undefined === _.find(daemons, { id: selectedDaemon.id })) {
+          this.selectDefaultDaemon(daemons);
+        }
+      })
+    );
+  }
+
+  get(id: string) {
+    return this.http.get(`${this.url}/${id}`);
+  }
+
+  selectDaemon(daemon: RgwDaemon) {
+    this.selectedDaemon.next(daemon);
+  }
+
+  private selectDefaultDaemon(daemons: RgwDaemon[]): RgwDaemon {
+    if (daemons.length === 0) {
+      return null;
+    }
+
+    for (const daemon of daemons) {
+      if (daemon.default) {
+        this.selectDaemon(daemon);
+        return daemon;
+      }
+    }
+
+    this.selectDaemon(daemons[0]);
+    return daemons[0];
+  }
+
+  request(next: (params: HttpParams) => Observable<any>) {
+    return this.selectedDaemon.pipe(
+      mergeMap((daemon: RgwDaemon) =>
+        // If there is no selected daemon, retrieve daemon list so default daemon will be selected.
+        _.isEmpty(daemon)
+          ? this.list().pipe(
+              mergeMap((daemons) =>
+                _.isEmpty(daemons) ? throwError('No RGW daemons found!') : this.selectedDaemon$
+              )
+            )
+          : of(daemon)
+      ),
+      take(1),
+      mergeMap((daemon: RgwDaemon) => {
+        let params = new HttpParams();
+        params = params.append('daemon_name', daemon.id);
+        return next(params);
+      })
+    );
+  }
+}