Feat(BE-36,37,38,39): finish master data management api

internal/utils/slice.go

@@ -0,0 +1,34 @@
+package utils
+
+// UniqueUintSlice returns a new slice containing distinct values in the order of first appearance.
+func UniqueUintSlice(values []uint) []uint {
+	if len(values) == 0 {
+		return nil
+	}
+
+	seen := make(map[uint]struct{}, len(values))
+	result := make([]uint, 0, len(values))
+	for _, v := range values {
+		if _, ok := seen[v]; ok {
+			continue
+		}
+		seen[v] = struct{}{}
+		result = append(result, v)
+	}
+	return result
+}
+
+// MissingUintIDs returns the values present in expected but missing from actual.
+func MissingUintIDs(expected, actual []uint) []uint {
+	lookup := make(map[uint]struct{}, len(actual))
+	for _, v := range actual {
+		lookup[v] = struct{}{}
+	}
+	missing := make([]uint, 0)
+	for _, v := range expected {
+		if _, ok := lookup[v]; !ok {
+			missing = append(missing, v)
+		}
+	}
+	return missing
+}