Add gradient service

projects/common/src/fm/services/gradient.service.ts

@@ -0,0 +1,25 @@
+import { Injectable } from '@angular/core';
+import {IGradientstop } from '../models/gradient'
+
+@Injectable({
+  providedIn: 'root',
+})
+export class GradientService {
+  constructor() {
+  }
+
+  getGradientStyle(gradient:IGradientstop[],portrait:boolean = false ):any {
+      let gd = '{ "background": "linear-gradient(to ' + (portrait?'bottom':'right') +',';
+      for(var i=0;i<gradient.length;i++) {
+        let gs = gradient[i];
+        if(i>0) gd+=",";
+        gd += `rgba(${gs.color.red},${gs.color.green},${gs.color.blue},${gs.color.alpha/255})`;          
+        gd +=` ${gs.relativestop*100}%`
+      }
+      gradient.forEach((gs) => {
+      });
+      gd+=')"}';
+      
+      return JSON.parse(gd);
+    }  
+}