Add http param encoder option to rest service

npm/ng-packs/packages/core/src/lib/models/rest.ts

@@ -1,10 +1,11 @@
-import { HttpHeaders, HttpParams } from '@angular/common/http';
+import { HttpHeaders, HttpParameterCodec, HttpParams } from '@angular/common/http';
 
 export namespace Rest {
   export type Config = Partial<{
     apiName: string;
     skipHandleError: boolean;
     observe: Observe;
+    httpParamEncoder?: HttpParameterCodec;
   }>;
 
   export const enum Observe {
@@ -20,6 +21,8 @@ export namespace Rest {
     Text = 'text',
   }
 
+  export type Params = HttpParams | { [param: string]: any };
+
   export interface Request<T> {
     body?: T;
     headers?:
@@ -28,11 +31,7 @@ export namespace Rest {
           [header: string]: string | string[];
         };
     method: string;
-    params?:
-      | HttpParams
-      | {
-          [param: string]: any;
-        };
+    params?: Params;
     reportProgress?: boolean;
     responseType?: 'arraybuffer' | 'blob' | 'json' | 'text';
     url: string;

npm/ng-packs/packages/core/src/lib/services/rest.service.ts

@@ -1,4 +1,4 @@
-import { HttpClient, HttpRequest } from '@angular/common/http';
+import { HttpClient, HttpParameterCodec, HttpParams, HttpRequest } from '@angular/common/http';
 import { Inject, Injectable } from '@angular/core';
 import { Observable, throwError } from 'rxjs';
 import { catchError } from 'rxjs/operators';
@@ -43,18 +43,22 @@ export class RestService {
       .request<R>(method, api + request.url, {
         observe,
         ...(params && {
-          params: Object.keys(params).reduce((acc, key) => {
-            const value = params[key];
-
-            if (isUndefinedOrEmptyString(value)) return acc;
-            if (value === null && !this.options.sendNullsAsQueryParam) return acc;
-
-            acc[key] = value;
-            return acc;
-          }, {}),
+          params: this.getParams(params, config.httpParamEncoder),
         }),
         ...options,
       } as any)
       .pipe(catchError(err => (skipHandleError ? throwError(err) : this.handleError(err))));
   }
+
+  private getParams(params: Rest.Params, encoder?: HttpParameterCodec): HttpParams {
+    const httpParams = encoder ? new HttpParams({ encoder }) : new HttpParams();
+    return Object.keys(params).reduce((acc, key) => {
+      const value = params[key];
+
+      if (isUndefinedOrEmptyString(value)) return acc;
+      if (value === null && !this.options.sendNullsAsQueryParam) return acc;
+      acc = acc.set(key, value);
+      return acc;
+    }, httpParams);
+  }
 }