Function createInsertComponent

parser.go:1128–1176

SYS-REQ-009, SYS-REQ-110, SYS-REQ-111

(keys []string, setValue []byte, comma, object bool)

// SYS-REQ-009, SYS-REQ-110, SYS-REQ-111
func createInsertComponent(keys []string, setValue []byte, comma, object bool) []byte {
	// guard: empty key component — not an array index.
	isIndex := len(keys[0]) > 0 && string(keys[0][0]) == "["
	offset := 0
	lk := calcAllocateSpace(keys, setValue, comma, object)
	buffer := make([]byte, lk, lk)
	if comma {
		offset += WriteToBuffer(buffer[offset:], ",")
	}
	if isIndex && !comma {
		offset += WriteToBuffer(buffer[offset:], "[")
	} else {
		if object {
			offset += WriteToBuffer(buffer[offset:], "{")
		}
		if !isIndex {
			offset += WriteToBuffer(buffer[offset:], "\"")
			offset += WriteToBuffer(buffer[offset:], keys[0])
			offset += WriteToBuffer(buffer[offset:], "\":")
		}
	}

	for i := 1; i < len(keys); i++ {
		// guard: empty key component — treat as object key, not array index.
		if len(keys[i]) > 0 && string(keys[i][0]) == "[" {
			offset += WriteToBuffer(buffer[offset:], "[")
		} else {
			offset += WriteToBuffer(buffer[offset:], "{\"")
			offset += WriteToBuffer(buffer[offset:], keys[i])
			offset += WriteToBuffer(buffer[offset:], "\":")
		}
	}
	offset += copy(buffer[offset:], setValue)
	for i := len(keys) - 1; i > 0; i-- {
		// guard: empty key component — treat as object key, not array index.
		if len(keys[i]) > 0 && string(keys[i][0]) == "[" {
			offset += WriteToBuffer(buffer[offset:], "]")
		} else {
			offset += WriteToBuffer(buffer[offset:], "}")
		}
	}
	if isIndex && !comma {
		offset += WriteToBuffer(buffer[offset:], "]")
	}
	if object && !isIndex {
		offset += WriteToBuffer(buffer[offset:], "}")
	}
	return buffer
}

// SYS-REQ-009, SYS-REQ-111
func calcAllocateSpace(keys []string, setValue []byte, comma, object bool) int {