refactor: function argument parsing using named regex (mudler#4708)

Signed-off-by: Maximilian Kenfenheuer <maximilian.kenfenheuer@ksol.it>

Author: mKenfenheuer

pkg/functions/parse.go

@@ -331,37 +331,36 @@ func ParseFunctionCall(llmresult string, functionConfig FunctionsConfig) []FuncC
 }
 
 func ParseFunctionCallArgs(functionArguments string, functionConfig FunctionsConfig) string {
-	if len(functionConfig.ArgumentRegex) > 0 {
-		// We use named regexes here to extract the function argument key value pairs and convert this to valid json.
-		// TODO: there might be responses where an object as a value is expected/required. This is currently not handled.
-		args := make(map[string]string)
-
-		agrsRegexKeyName := "key"
-		agrsRegexValueName := "value"
+	if len(functionConfig.ArgumentRegex) == 0 {
+		return functionArguments
+	}
 
-		if functionConfig.ArgumentRegexKey != "" {
-			agrsRegexKeyName = functionConfig.ArgumentRegexKey
-		}
-		if functionConfig.ArgumentRegexValue != "" {
-			agrsRegexValueName = functionConfig.ArgumentRegexValue
-		}
+	// We use named regexes here to extract the function argument key value pairs and convert this to valid json.
+	// TODO: there might be responses where an object as a value is expected/required. This is currently not handled.
+	args := make(map[string]string)
 
-		for _, r := range functionConfig.ArgumentRegex {
-			var respRegex = regexp.MustCompile(r)
-			var nameRange []string = respRegex.SubexpNames()
-			var keyIndex = slices.Index(nameRange, agrsRegexKeyName)
-			var valueIndex = slices.Index(nameRange, agrsRegexValueName)
-			matches := respRegex.FindAllStringSubmatch(functionArguments, -1)
-			for _, match := range matches {
-				args[match[keyIndex]] = match[valueIndex]
-			}
-		}
+	agrsRegexKeyName := "key"
+	agrsRegexValueName := "value"
 
-		jsonBytes, _ := json.Marshal(args)
-		jsonString := string(jsonBytes)
+	if functionConfig.ArgumentRegexKey != "" {
+		agrsRegexKeyName = functionConfig.ArgumentRegexKey
+	}
+	if functionConfig.ArgumentRegexValue != "" {
+		agrsRegexValueName = functionConfig.ArgumentRegexValue
+	}
 
-		return jsonString
-	} else {
-		return functionArguments
+	for _, r := range functionConfig.ArgumentRegex {
+		var respRegex = regexp.MustCompile(r)
+		var nameRange []string = respRegex.SubexpNames()
+		var keyIndex = slices.Index(nameRange, agrsRegexKeyName)
+		var valueIndex = slices.Index(nameRange, agrsRegexValueName)
+		matches := respRegex.FindAllStringSubmatch(functionArguments, -1)
+		for _, match := range matches {
+			args[match[keyIndex]] = match[valueIndex]
+		}
 	}
+
+	jsonBytes, _ := json.Marshal(args)
+	
+	return string(jsonBytes)
 }