refactor: include generics based utility lib and refactor some parts accordingly [ci-skip]

utils/collection.go

@@ -1,9 +0,0 @@
-package utils
-
-func GetMapValues(m map[string]interface{}) []interface{} {
-	values := make([]interface{}, 0, len(m))
-	for _, v := range m {
-		values = append(values, v)
-	}
-	return values
-}

utils/date.go

@@ -5,6 +5,12 @@ import (
 	"time"
 )
 
+// TODO: replace these functions by github.com/duke-git/lancet/v2/datetime
+// needs additional thoughts, though, as for "EndOfX" functions, we currently return the discrete next day,
+// while the above lib returns the very last nanosecond of the current day, i.e.
+// 2022-02-15 23:59:59.999 +0800 CST vs. 2022-02-16 00:00:00.000 +0800 CST
+// -> need to revisit comparison logic, etc.
+
 func StartOfDay(date time.Time) time.Time {
 	return FloorDate(date)
 }

utils/set.go

@@ -1,17 +0,0 @@
-package utils
-
-func StringsToSet(slice []string) map[string]bool {
-	set := make(map[string]bool, len(slice))
-	for _, e := range slice {
-		set[e] = true
-	}
-	return set
-}
-
-func SetToStrings(set map[string]bool) []string {
-	slice := make([]string, 0, len(set))
-	for k := range set {
-		slice = append(slice, k)
-	}
-	return slice
-}

utils/strings.go

@@ -8,12 +8,3 @@ import (
 func Capitalize(s string) string {
 	return fmt.Sprintf("%s%s", strings.ToUpper(s[:1]), s[1:])
 }
-
-func FindString(needle string, haystack []string, defaultVal string) string {
-	for _, s := range haystack {
-		if s == needle {
-			return s
-		}
-	}
-	return defaultVal
-}