ds2api/internal/adapter/openai/tool_sieve_jsonscan.go

package openai

func extractJSONObjectFrom(text string, start int) (string, int, bool) {
	if start < 0 || start >= len(text) || text[start] != '{' {
		return "", 0, false
	}
	depth := 0
	quote := byte(0)
	escaped := false
	for i := start; i < len(text); i++ {
		ch := text[i]
		if quote != 0 {
			if escaped {
				escaped = false
				continue
			}
			if ch == '\\' {
				escaped = true
				continue
			}
			if ch == quote {
				quote = 0
			}
			continue
		}
		if ch == '"' || ch == '\'' {
			quote = ch
			continue
		}
		if ch == '{' {
			depth++
			continue
		}
		if ch == '}' {
			depth--
			if depth == 0 {
				end := i + 1
				return text[start:end], end, true
			}
		}
	}
	return "", 0, false
}