Solved issue with non-existing search pages

src/app/core/services/route.actions.ts

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+import { Action } from '@ngrx/store';
+import { type } from '../../shared/ngrx/type';
+import { Params } from '@angular/router';
+
+/**
+ * The list of HrefIndexAction type definitions
+ */
+export const RouteActionTypes = {
+  SET_QUERY_PARAMETERS: type('dspace/core/route/SET_QUERY_PARAMETERS'),
+  SET_PARAMETERS: type('dspace/core/route/SET_PARAMETERS'),
+  ADD_QUERY_PARAMETER: type('dspace/core/route/ADD_QUERY_PARAMETER'),
+  ADD_PARAMETER: type('dspace/core/route/ADD_PARAMETER'),
+  RESET: type('dspace/core/route/RESET'),
+};
+
+/* tslint:disable:max-classes-per-file */
+/**
+ * An ngrx action to set the query parameters
+ */
+export class SetQueryParametersAction implements Action {
+  type = RouteActionTypes.SET_QUERY_PARAMETERS;
+  payload: Params;
+
+  /**
+   * Create a new SetQueryParametersAction
+   *
+   * @param parameters
+   *    the query parameters
+   */
+  constructor(parameters: Params) {
+    this.payload = parameters;
+  }
+}
+
+/**
+ * An ngrx action to set the parameters
+ */
+export class SetParametersAction implements Action {
+  type = RouteActionTypes.SET_PARAMETERS;
+  payload: Params;
+
+  /**
+   * Create a new SetParametersAction
+   *
+   * @param parameters
+   *    the parameters
+   */
+  constructor(parameters: Params) {
+    this.payload = parameters;
+  }
+}
+
+/**
+ * An ngrx action to add a query parameter
+ */
+export class AddQueryParameterAction implements Action {
+  type = RouteActionTypes.ADD_QUERY_PARAMETER;
+  payload: {
+    key: string;
+    value: string;
+  };
+
+  /**
+   * Create a new AddQueryParameterAction
+   *
+   * @param key
+   *    the key to add
+   * @param value
+   *    the value of this key
+   */
+  constructor(key: string, value: string) {
+    this.payload = { key, value };
+  }
+}
+
+/**
+ * An ngrx action to add a parameter
+ */
+export class AddParameterAction implements Action {
+  type = RouteActionTypes.ADD_PARAMETER;
+  payload: {
+    key: string;
+    value: string;
+  };
+
+  /**
+   * Create a new AddParameterAction
+   *
+   * @param key
+   *    the key to add
+   * @param value
+   *    the value of this key
+   */
+  constructor(key: string, value: string) {
+    this.payload = { key, value };
+  }
+}
+
+/**
+ * An ngrx action to reset the route state
+ */
+export class ResetRouteStateAction implements Action {
+  type = RouteActionTypes.RESET;
+}
+
+/* tslint:enable:max-classes-per-file */
+
+/**
+ * A type to encompass all RouteActions
+ */
+export type RouteActions =
+  SetQueryParametersAction
+  | SetParametersAction
+  | AddQueryParameterAction
+  | AddParameterAction
+  | ResetRouteStateAction;