package main

import (
	"os"
	"regexp"

	qt "github.com/mappu/miqt/qt6"
)

// src_to_html converts plaintext Javascript source to HTML with embedded images
// for use with QTextEdit.
func src_to_html(s string) string {
	// Convert "" to <img src=""> but only if the target file exists
	return regexp.MustCompile(`"[0-9]+\.png"`).ReplaceAllStringFunc(s, func(match string) string {
		rawName := match[1 : len(match)-1]
		if _, err := os.Stat(rawName); err == nil {
			return `<img src="` + rawName + `" />`
		}

		return match // no good
	})
}

// html_to_src converts the mini HTML from a QTextEdit into plaintext Javascript
// source, with images converted back to string literals.
func html_to_src(s string) string {

	// Convert <img src=""> to ""
	patchedHtmlSrc := regexp.MustCompile(`<img src="[0-9]+\.png" />`).ReplaceAllStringFunc(s, func(match string) string {
		return match[9 : len(match)-3]
	})

	tmp := qt.NewQTextEdit2()
	tmp.SetHtml(patchedHtmlSrc)
	ret := tmp.ToPlainText()
	tmp.Delete()

	return ret
}