Client: centralize http res extraction in a service

4 files changed, 81 insertions, 0 deletions

diff --git a/client/src/app/shared/rest/index.ts b/client/src/app/shared/rest/index.ts
new file mode 100644
index 000000000..3c9509dc7
--- /dev/null
+++ b/client/src/app/shared/rest/index.ts
@@ -0,0 +1,3 @@
+export * from './rest-extractor.service';
+export * from './rest-pagination';
+export * from './rest.service';
diff --git a/client/src/app/shared/rest/rest-extractor.service.ts b/client/src/app/shared/rest/rest-extractor.service.ts
new file mode 100644
index 000000000..aa44799af
--- /dev/null
+++ b/client/src/app/shared/rest/rest-extractor.service.ts
@@ -0,0 +1,46 @@
+import { Injectable } from '@angular/core';
+import { Response } from '@angular/http';
+import { Observable } from 'rxjs/Observable';
+
+export interface ResultList {
+  data: any[];
+  total: number;
+}
+
+@Injectable()
+export class RestExtractor {
+
+  constructor () { ; }
+
+  extractDataBool(res: Response) {
+    return true;
+  }
+
+  extractDataList(res: Response) {
+    const body = res.json();
+
+    const ret: ResultList = {
+      data: body.data,
+      total: body.total
+    };
+
+    return ret;
+  }
+
+  extractDataGet(res: Response) {
+    return res.json();
+  }
+
+  handleError(res: Response) {
+    let text = 'Server error: ';
+    text += res.text();
+    let json = res.json();
+
+    const error = {
+      json,
+      text
+    };
+
+    return Observable.throw(error);
+  }
+}
diff --git a/client/src/app/shared/rest/rest-pagination.ts b/client/src/app/shared/rest/rest-pagination.ts
new file mode 100644
index 000000000..0cfa4f468
--- /dev/null
+++ b/client/src/app/shared/rest/rest-pagination.ts
@@ -0,0 +1,5 @@
+export interface RestPagination {
+  currentPage: number;
+  itemsPerPage: number;
+  totalItems: number;
+};
diff --git a/client/src/app/shared/rest/rest.service.ts b/client/src/app/shared/rest/rest.service.ts
new file mode 100644
index 000000000..16b47e957
--- /dev/null
+++ b/client/src/app/shared/rest/rest.service.ts
@@ -0,0 +1,27 @@
+import { Injectable } from '@angular/core';
+import { URLSearchParams } from '@angular/http';
+
+import { RestPagination } from './rest-pagination';
+
+@Injectable()
+export class RestService {
+
+  buildRestGetParams(pagination?: RestPagination, sort?: string) {
+    const params = new URLSearchParams();
+
+    if (pagination) {
+      const start: number = (pagination.currentPage - 1) * pagination.itemsPerPage;
+      const count: number = pagination.itemsPerPage;
+
+      params.set('start', start.toString());
+      params.set('count', count.toString());
+    }
+
+    if (sort) {
+      params.set('sort', sort);
+    }
+
+    return params;
+  }
+
+}