add permission logic to nav bar.

src/app/services/permission.service.ts

@@ -0,0 +1,56 @@
+import { Injectable } from '@angular/core';
+import { SessionStore } from '../store/session.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class PermissionService {
+
+  SessionStore = SessionStore
+
+  constructor() { }
+
+  userRole(args) {
+
+    if(!Array.isArray(args)) {
+      args = [args]
+    }
+
+    return args.includes(this.SessionStore.user.Profile)
+  }
+
+  userPermission(args) {
+
+    if(!Array.isArray(args)) {
+      args = [args]
+    }
+    for(let permission of this.SessionStore.user.UserPermissions){
+      if (args.includes(permission)){
+        return true;
+      }
+    }
+    return false;
+
+  }
+
+  role(args: any) {
+
+    let UserRoleIsValid = this.userRole(args)
+
+    return {
+      permissionAnyOf(role) {
+
+        if(!Array.isArray(role)) {
+          role = [role]
+        }
+
+        if(!UserRoleIsValid) {return false }
+
+        return true
+
+      }
+    }
+
+  }
+
+}