Add config endpoint service

src/app/core/data/config-response-parsing.service.ts

@@ -0,0 +1,36 @@
+import { Injectable } from '@angular/core';
+
+import { ResponseParsingService } from './parsing.service';
+import { RestRequest } from './request.models';
+import { DSpaceRESTV2Response } from '../dspace-rest-v2/dspace-rest-v2-response.model';
+import { ConfigSuccessResponse, ErrorResponse, RestResponse } from '../cache/response-cache.models';
+import { isNotEmpty } from '../../shared/empty.util';
+import { DSpaceRESTv2Serializer } from '../dspace-rest-v2/dspace-rest-v2.serializer';
+import { ConfigObjectFactory } from '../shared/config/config-object-factory';
+
+@Injectable()
+export class ConfigResponseParsingService implements ResponseParsingService {
+
+  parse(request: RestRequest, data: DSpaceRESTV2Response): RestResponse {
+    if (isNotEmpty(data.payload) && isNotEmpty(data.payload._links)) {
+      let configDefinition;
+      if (isNotEmpty(data.payload._embedded) && Array.isArray(data.payload._embedded[Object.keys(data.payload._embedded)[0]])) {
+        const type = Object.keys(data.payload._embedded)[0];
+        const serializer = new DSpaceRESTv2Serializer(ConfigObjectFactory.getConstructor(type));
+        configDefinition = serializer.deserializeArray(data.payload._embedded[Object.keys(data.payload._embedded)[0]]);
+
+      } else {
+        const serializer = new DSpaceRESTv2Serializer(ConfigObjectFactory.getConstructor(data.payload.type));
+        configDefinition = serializer.deserialize(data.payload);
+      }
+      return new ConfigSuccessResponse(configDefinition, data.statusCode);
+    } else {
+      return new ErrorResponse(
+        Object.assign(
+          new Error('Unexpected response from config endpoint'),
+          {statusText: data.statusCode}
+        )
+      );
+    }
+  }
+}