Move packages to proejct/pkg to follow go project folder structure convention (#1190)

pkg/storagesvc/util.go

@@ -0,0 +1,53 @@
+/*
+Copyright 2017 The Fission Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package storagesvc
+
+import (
+	"net/url"
+
+	"github.com/pkg/errors"
+)
+
+func getQueryParamValue(urlString string, queryParam string) (string, error) {
+	url, err := url.Parse(urlString)
+	if err != nil {
+		return "", errors.Wrapf(err, "error parsing URL string %q into URL", urlString)
+	}
+	return url.Query().Get(queryParam), nil
+}
+
+func getDifferenceOfLists(firstList []string, secondList []string) []string {
+	tempMap := make(map[string]int)
+	differenceList := make([]string, 0)
+
+	for _, item := range firstList {
+		tempMap[item] = 1
+	}
+
+	for _, item := range secondList {
+		_, ok := tempMap[item]
+		if ok {
+			delete(tempMap, item)
+		}
+	}
+
+	for k := range tempMap {
+		differenceList = append(differenceList, k)
+	}
+
+	return differenceList
+}