Add data layer

projects/common/src/fm/services/senml-service.ts

@@ -0,0 +1,21 @@
+import { Injectable } from '@angular/core';
+import { IJsonline } from '../models/json-line';
+import { ISenMLItem } from '../models/senml-item';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class SenmlService {
+    constructor() {
+    }
+
+    getSenMLItem(name:string,jsonLine:IJsonline): ISenMLItem {
+        if (jsonLine) {
+          var senmlPack = jsonLine.data as ISenMLItem[];
+          var temp = senmlPack.filter((i) => i.u == name);
+          if (temp.length == 1) return temp[0];
+          return null;
+        }
+      }
+
+}