From 5f753c3e93f2a7bba74a7d05bca9973ccb64cb07 Mon Sep 17 00:00:00 2001
From: "direct-dev.ru" <info@direct-dev.ru>
Date: Fri, 24 Apr 2026 16:32:45 +0600
Subject: [PATCH] fixed compare behaviour

---
 pkg/linedb/jsonl_file.go   |  10 +++-
 pkg/linedb/line_db.go      |   2 +-
 pkg/linedb/string_match.go | 118 +++++++++++++++++++++++++++++++++++++
 3 files changed, 126 insertions(+), 4 deletions(-)
 create mode 100644 pkg/linedb/string_match.go

diff --git a/pkg/linedb/jsonl_file.go b/pkg/linedb/jsonl_file.go
index f1caea6..913d207 100644
--- a/pkg/linedb/jsonl_file.go
+++ b/pkg/linedb/jsonl_file.go
@@ -1103,14 +1103,18 @@ func (j *JSONLFile) valuesMatch(a, b any, strictCompare bool) bool {
 		return a == b
 	}
 
-	// Для строк - нечувствительное к регистру сравнение
+	if a == b {
+		return true
+	}
+
+	// Для строк - нечувствительное к регистру сравнение (равенство, не подстрока)
 	if aStr, ok := a.(string); ok {
 		if bStr, ok := b.(string); ok {
-			return strings.Contains(strings.ToLower(aStr), strings.ToLower(bStr))
+			return matchStringByPattern(aStr, bStr, strictCompare)
 		}
 	}
 
-	return a == b
+	return false
 }
 
 // rewriteFile перезаписывает файл новыми данными
diff --git a/pkg/linedb/line_db.go b/pkg/linedb/line_db.go
index 5df63ed..c1763b8 100644
--- a/pkg/linedb/line_db.go
+++ b/pkg/linedb/line_db.go
@@ -1474,7 +1474,7 @@ func (db *LineDb) valuesMatch(a, b any, strictCompare bool) bool {
 	// Сравнение строк
 	if aStr, ok := a.(string); ok {
 		if bStr, ok := b.(string); ok {
-			return strings.EqualFold(aStr, bStr)
+			return matchStringByPattern(aStr, bStr, strictCompare)
 		}
 	}
 
diff --git a/pkg/linedb/string_match.go b/pkg/linedb/string_match.go
new file mode 100644
index 0000000..4630908
--- /dev/null
+++ b/pkg/linedb/string_match.go
@@ -0,0 +1,118 @@
+package linedb
+
+import "strings"
+
+type stringMatchMode int
+
+const (
+	stringMatchEqual stringMatchMode = iota
+	stringMatchContains
+	stringMatchHasPrefix
+	stringMatchHasSuffix
+)
+
+func matchStringByPattern(value string, pattern string, strictCompare bool) bool {
+	mode, lit := parsePercentPattern(pattern)
+
+	if !strictCompare {
+		// For substring checks we use ToLower (close enough to EqualFold intent).
+		value = strings.ToLower(value)
+		lit = strings.ToLower(lit)
+	}
+
+	switch mode {
+	case stringMatchContains:
+		return strings.Contains(value, lit)
+	case stringMatchHasPrefix:
+		return strings.HasPrefix(value, lit)
+	case stringMatchHasSuffix:
+		return strings.HasSuffix(value, lit)
+	default:
+		if strictCompare {
+			return value == lit
+		}
+		return strings.EqualFold(value, lit)
+	}
+}
+
+// parsePercentPattern interprets unescaped % at the start/end of pattern:
+// - %foo% => contains "foo"
+// - foo%  => hasPrefix "foo"
+// - %foo  => hasSuffix "foo"
+// - foo   => equal "foo"
+// Escaping: \% means literal %, \\ means literal \ (only affects escape processing).
+func parsePercentPattern(pattern string) (stringMatchMode, string) {
+	if pattern == "" {
+		return stringMatchEqual, ""
+	}
+
+	leading := pattern[0] == '%'
+	trailing := len(pattern) > 0 && pattern[len(pattern)-1] == '%' && !isEscapedAt(pattern, len(pattern)-1)
+
+	start := 0
+	end := len(pattern)
+	if leading {
+		start = 1
+	}
+	if trailing && end > start {
+		end--
+	}
+	lit := unescapePercents(pattern[start:end])
+
+	switch {
+	case leading && trailing:
+		return stringMatchContains, lit
+	case trailing:
+		return stringMatchHasPrefix, lit
+	case leading:
+		return stringMatchHasSuffix, lit
+	default:
+		return stringMatchEqual, unescapePercents(pattern)
+	}
+}
+
+func isEscapedAt(s string, idx int) bool {
+	// idx is escaped if preceded by an odd number of backslashes.
+	if idx <= 0 || idx >= len(s) {
+		return false
+	}
+	n := 0
+	for i := idx - 1; i >= 0 && s[i] == '\\'; i-- {
+		n++
+	}
+	return n%2 == 1
+}
+
+func unescapePercents(s string) string {
+	if s == "" {
+		return ""
+	}
+	var b strings.Builder
+	b.Grow(len(s))
+	esc := false
+	for i := 0; i < len(s); i++ {
+		ch := s[i]
+		if esc {
+			// Only unescape % and \; keep backslash for other chars.
+			if ch == '%' || ch == '\\' {
+				b.WriteByte(ch)
+			} else {
+				b.WriteByte('\\')
+				b.WriteByte(ch)
+			}
+			esc = false
+			continue
+		}
+		if ch == '\\' {
+			esc = true
+			continue
+		}
+		b.WriteByte(ch)
+	}
+	if esc {
+		// dangling backslash
+		b.WriteByte('\\')
+	}
+	return b.String()
+}
+