refactored document rest api

src-ui/src/app/data/filter-rule.ts

@@ -1,20 +1,15 @@
 import { FilterRuleType } from './filter-rule-type';
 
-
-export function filterRulesToQueryParams(filterRules: FilterRule[]) {
-  let params = {}
-  for (let rule of filterRules) {
-    params[rule.type.filtervar] = rule.value
-  }
-  return params
-}
-
 export function cloneFilterRules(filterRules: FilterRule[]): FilterRule[] {
-  let newRules: FilterRule[] = []
-  for (let rule of filterRules) {
-    newRules.push({type: rule.type, value: rule.value})
+  if (filterRules) {
+    let newRules: FilterRule[] = []
+    for (let rule of filterRules) {
+      newRules.push({type: rule.type, value: rule.value})
+    }
+    return newRules      
+  } else {
+    return null
   }
-  return newRules
 }
 
 export interface FilterRule {