add regex support and clipboard support to notification center

Overlord-Client/cmd/agent/activewindow/match.go

@@ -0,0 +1,55 @@
+package activewindow
+
+import (
+	"regexp"
+	"strings"
+)
+
+func matchKeyword(text string, keywords []string) string {
+	if text == "" {
+		return ""
+	}
+	lower := strings.ToLower(text)
+	for _, kw := range keywords {
+		trimmed := strings.TrimSpace(kw)
+		if trimmed == "" {
+			continue
+		}
+		if strings.HasPrefix(trimmed, "/") {
+			re, ok := parseRegexKeyword(trimmed)
+			if ok && re.MatchString(text) {
+				return kw
+			}
+		} else {
+			if strings.Contains(lower, strings.ToLower(trimmed)) {
+				return kw
+			}
+		}
+	}
+	return ""
+}
+
+func parseRegexKeyword(kw string) (*regexp.Regexp, bool) {
+	if !strings.HasPrefix(kw, "/") {
+		return nil, false
+	}
+	rest := kw[1:]
+	lastSlash := strings.LastIndex(rest, "/")
+	if lastSlash < 0 {
+		return nil, false
+	}
+	pattern := rest[:lastSlash]
+	flags := rest[lastSlash+1:]
+	if pattern == "" {
+		return nil, false
+	}
+	regexStr := pattern
+	if strings.ContainsRune(flags, 'i') {
+		regexStr = "(?i)" + pattern
+	}
+	re, err := regexp.Compile(regexStr)
+	if err != nil {
+		return nil, false
+	}
+	return re, true
+}