package main

import "strings"

// terminalImageRequest reads /image with one path and an optional caption.
// Single and double quotes permit spaces in a path, with no shell expansion. An
// invalid path argument becomes an empty path for the daemon to refuse.
func terminalImageRequest(line string) (SocketRequest, bool) {
	rest, found := strings.CutPrefix(strings.TrimLeft(line, " \t"), "/image")
	if !found || (rest != "" && rest[0] != ' ' && rest[0] != '\t') {
		return SocketRequest{}, false
	}

	request := SocketRequest{Type: "image"}
	rest = strings.TrimLeft(rest, " \t")
	if rest == "" {
		return request, true
	}

	if rest[0] == '\'' || rest[0] == '"' {
		end := strings.IndexByte(rest[1:], rest[0])
		if end < 0 {
			return request, true
		}

		request.Path = rest[1 : 1+end]
		rest = rest[end+2:]
		if rest != "" && rest[0] != ' ' && rest[0] != '\t' {
			request.Path = ""
			return request, true
		}
	} else {
		end := strings.IndexAny(rest, " \t")
		if end < 0 {
			request.Path = rest
			return request, true
		}

		request.Path = rest[:end]
		rest = rest[end:]
	}

	request.Text = strings.TrimLeft(rest, " \t")

	return request, true
}