Users-Group Update API (#49)

* Added structure to swagger

* Added updateUserGroups handlers

* Updated return definition for user groups.

* Logic rewrite

* Removed logs

* Added some tests to updateUserGroups

* lint fix

* Updated tests for the new API

* Lint

* Added comment about why we are setting this groups individually. & more lint fixes

* Updated tests page

* Added more tests & fixed comments for PR

* Lint utils file

* Fixed import orders

* Changed import order

Co-authored-by: Benjamin Perez <benjamin@bexsoft.net>

restapi/utils.go

@@ -30,3 +30,27 @@ func DifferenceArrays(a, b []string) []string {
 	}
 	return diff
 }
+
+// IsElementInSlice returns true if the string belongs to the slice
+func IsElementInArray(a []string, b string) bool {
+	for _, e := range a {
+		if e == b {
+			return true
+		}
+	}
+
+	return false
+}
+
+// UniqueKeys returns an array without duplicated keys
+func UniqueKeys(a []string) []string {
+	keys := make(map[string]bool)
+	list := []string{}
+	for _, entry := range a {
+		if _, value := keys[entry]; !value {
+			keys[entry] = true
+			list = append(list, entry)
+		}
+	}
+	return list
+}