[ADF-4911] migrate identity role service (#5096)

* migrate IdentityRoleService implementation

* update unit tests

* move interfaces to the origin

* move models to proper places

* migrate model to interface

* fix test

* update docs

lib/core/services/bpm-user.service.ts

@@ -0,0 +1,73 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Injectable } from '@angular/core';
+import { Observable, from, throwError } from 'rxjs';
+import { AlfrescoApiService } from './alfresco-api.service';
+import { LogService } from './log.service';
+import { BpmUserModel } from '../models/bpm-user.model';
+import { map, catchError } from 'rxjs/operators';
+import { UserRepresentation } from '@alfresco/js-api';
+
+/**
+ *
+ * BPMUserService retrieve all the information of an Ecm user.
+ *
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class BpmUserService {
+
+    constructor(private apiService: AlfrescoApiService,
+                private logService: LogService) {
+    }
+
+    /**
+     * Gets information about the current user.
+     * @returns User information object
+     */
+    getCurrentUserInfo(): Observable<BpmUserModel> {
+        return from(this.apiService.getInstance().activiti.profileApi.getProfile())
+            .pipe(
+                map((userRepresentation: UserRepresentation) => {
+                    return new BpmUserModel(userRepresentation);
+                }),
+                catchError((err) => this.handleError(err))
+            );
+    }
+
+    /**
+     * Gets the current user's profile image as a URL.
+     * @returns URL string
+     */
+    getCurrentUserProfileImage(): string {
+        return this.apiService.getInstance().activiti.profileApi.getProfilePictureUrl();
+    }
+
+    /**
+     * Throw the error
+     * @param error
+     */
+    private handleError(error: any) {
+        // in a real world app, we may send the error to some remote logging infrastructure
+        // instead of just logging it to the console
+        this.logService.error(error);
+        return throwError(error || 'Server error');
+    }
+
+}