Initial QSfera import

Server/vendor/github.com/samber/slog-common/groups.go

@@ -0,0 +1,65 @@
+package slogcommon
+
+import (
+	"log/slog"
+	"slices"
+
+	"github.com/samber/lo"
+)
+
+func AppendAttrsToGroup(groups []string, actualAttrs []slog.Attr, newAttrs ...slog.Attr) []slog.Attr {
+	if len(groups) == 0 {
+		actualAttrsCopy := make([]slog.Attr, 0, len(actualAttrs)+len(newAttrs))
+		actualAttrsCopy = append(actualAttrsCopy, actualAttrs...)
+		actualAttrsCopy = append(actualAttrsCopy, newAttrs...)
+		return UniqAttrs(actualAttrsCopy)
+	}
+
+	actualAttrs = slices.Clone(actualAttrs)
+
+	for i := range actualAttrs {
+		attr := actualAttrs[i]
+		if attr.Key == groups[0] && attr.Value.Kind() == slog.KindGroup {
+			actualAttrs[i] = slog.Group(groups[0], lo.ToAnySlice(AppendAttrsToGroup(groups[1:], attr.Value.Group(), newAttrs...))...)
+			return actualAttrs
+		}
+	}
+
+	return UniqAttrs(
+		append(
+			actualAttrs,
+			slog.Group(
+				groups[0],
+				lo.ToAnySlice(AppendAttrsToGroup(groups[1:], []slog.Attr{}, newAttrs...))...,
+			),
+		),
+	)
+}
+
+// @TODO: should be recursive
+func UniqAttrs(attrs []slog.Attr) []slog.Attr {
+	return uniqByLast(attrs, func(item slog.Attr) string {
+		return item.Key
+	})
+}
+
+func uniqByLast[T any, U comparable](collection []T, iteratee func(item T) U) []T {
+	result := make([]T, 0, len(collection))
+	seen := make(map[U]int, len(collection))
+	seenIndex := 0
+
+	for _, item := range collection {
+		key := iteratee(item)
+
+		if index, ok := seen[key]; ok {
+			result[index] = item
+			continue
+		}
+
+		seen[key] = seenIndex
+		seenIndex++
+		result = append(result, item)
+	}
+
+	return result
+}