lmika/main.go

## main.go
package main

import (
	"bufio"
	"bytes"
	"fmt"
	"os"
	"regexp"
	"strings"
	"unicode"

	"github.com/gomarkdown/markdown"
)

func main() {
	// Read the Markdown input from stdin
	input := readInput()

	// Convert the Markdown to HTML
	html := parseKanbanToHTML(input)

	// Output the resulting HTML
	fmt.Println(html)
}

func readInput() string {
	var buffer bytes.Buffer
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		buffer.WriteString(scanner.Text() + "\n")
	}
	if err := scanner.Err(); err != nil {
		fmt.Fprintf(os.Stderr, "Error reading input: %v\n", err)
		os.Exit(1)
	}
	return buffer.String()
}

func parseKanbanToHTML(markdownInput string) string {
	lines := strings.Split(markdownInput, "\n")

	// Remove front matter if present
	lines = stripFrontMatter(lines)

	columnRegex := regexp.MustCompile(`^##\s+(.*)`)
	trailerRegex := regexp.MustCompile(`^%%`)
	cardRegex := regexp.MustCompile(`^- \[[ x]\](.*)`)

	html := &strings.Builder{}
	html.WriteString("<html><head><style>body{font-family:sans-serif;} .column{margin:10px;padding:10px;border:1px solid #ddd;display:inline-block;vertical-align:top;width:30%;} .card{margin:5px;padding:10px;border:1px solid #ccc;background:#f9f9f9;} .card-title{font-weight:bold;margin-bottom:5px;} .card-body{margin-top:5px;}</style></head><body>")

	var currentColumn string
	var cardBuffer strings.Builder
	inCard := false

	for _, line := range lines {
		line = strings.TrimRightFunc(line, unicode.IsSpace)

		if trailerRegex.MatchString(line) {
			break
		}

		if columnRegex.MatchString(line) {
			// Close the previous column div, if any
			if inCard {
				html.WriteString(fmt.Sprintf("<div class=\"card-body\">%s</div></div>", markdown.ToHTML([]byte(trimTabsLeftUpto(cardBuffer.String())), nil, nil)))
			}
			if currentColumn != "" {
				html.WriteString("</div>")
			}
			// Start a new column div
			matches := columnRegex.FindStringSubmatch(line)
			columnName := matches[1]
			currentColumn = columnName
			inCard = false
			cardBuffer.Reset()
			html.WriteString(fmt.Sprintf("<div class=\"column\"><h2>%s</h2>", columnName))
		} else if cardRegex.MatchString(line) {
			// If we are in a card, flush its contents
			if inCard {
				html.WriteString(fmt.Sprintf("<div class=\"card-body\">%s</div></div>", markdown.ToHTML([]byte(trimTabsLeftUpto(cardBuffer.String())), nil, nil)))
				cardBuffer.Reset()
			}
			// Start a new card
			matches := cardRegex.FindStringSubmatch(line)
			cardTitle := strings.TrimSpace(matches[1])
			html.WriteString(fmt.Sprintf("<div class=\"card\"><div class=\"card-title\">%s</div>", cardTitle))
			inCard = true
		} else if inCard {
			// Accumulate the card body content
			if len(line) > 0 {
				cardBuffer.WriteString(line + "\n")
			}
		}
	}

	// Close the last card and column divs if necessary
	if inCard {
		html.WriteString(fmt.Sprintf("<div class=\"card-body\">%s</div></div>", markdown.ToHTML([]byte(trimTabsLeftUpto(cardBuffer.String())), nil, nil)))
	}
	if currentColumn != "" {
		html.WriteString("</div>")
	}

	html.WriteString("</body></html>")
	return html.String()
}

func stripFrontMatter(lines []string) []string {
	if len(lines) > 0 && strings.TrimSpace(lines[0]) == "---" {
		for i := 1; i < len(lines); i++ {
			if strings.TrimSpace(lines[i]) == "---" {
				return lines[i+1:]
			}
		}
	}
	return lines
}

func trimTabsLeftUpto(lines string) string {
	res := strings.Builder{}
	leftMargin := 0

	for i, s := range strings.Split(lines, "\n") {
		if i == 0 {
			// Find the left margin
			for i, c := range s {
				if !unicode.IsSpace(c) {
					leftMargin = i
					break
				}
			}
		} else {
			res.WriteString("\n")
		}

		if leftMargin == 0 || len(s) < leftMargin {
			res.WriteString(s)
		} else {
			res.WriteString(s[leftMargin:])
		}
	}

	return res.String()
}
	package main

	import (
	"bufio"
	"bytes"
	"fmt"
	"os"
	"regexp"
	"strings"
	"unicode"

	"github.com/gomarkdown/markdown"
	)

	func main() {
	// Read the Markdown input from stdin
	input := readInput()

	// Convert the Markdown to HTML
	html := parseKanbanToHTML(input)

	// Output the resulting HTML
	fmt.Println(html)
	}

	func readInput() string {
	var buffer bytes.Buffer
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
	buffer.WriteString(scanner.Text() + "\n")
	}
	if err := scanner.Err(); err != nil {
	fmt.Fprintf(os.Stderr, "Error reading input: %v\n", err)
	os.Exit(1)
	}
	return buffer.String()
	}

	func parseKanbanToHTML(markdownInput string) string {
	lines := strings.Split(markdownInput, "\n")

	// Remove front matter if present
	lines = stripFrontMatter(lines)

	columnRegex := regexp.MustCompile(`^##\s+(.*)`)
	trailerRegex := regexp.MustCompile(`^%%`)
	cardRegex := regexp.MustCompile(`^- \[[ x]\](.*)`)

	html := &strings.Builder{}
	html.WriteString("<html><head><style>body{font-family:sans-serif;} .column{margin:10px;padding:10px;border:1px solid #ddd;display:inline-block;vertical-align:top;width:30%;} .card{margin:5px;padding:10px;border:1px solid #ccc;background:#f9f9f9;} .card-title{font-weight:bold;margin-bottom:5px;} .card-body{margin-top:5px;}</style></head><body>")

	var currentColumn string
	var cardBuffer strings.Builder
	inCard := false

	for _, line := range lines {
	line = strings.TrimRightFunc(line, unicode.IsSpace)

	if trailerRegex.MatchString(line) {
	break
	}

	if columnRegex.MatchString(line) {
	// Close the previous column div, if any
	if inCard {
	html.WriteString(fmt.Sprintf("<div class=\"card-body\">%s</div></div>", markdown.ToHTML([]byte(trimTabsLeftUpto(cardBuffer.String())), nil, nil)))
	}
	if currentColumn != "" {
	html.WriteString("</div>")
	}
	// Start a new column div
	matches := columnRegex.FindStringSubmatch(line)
	columnName := matches[1]
	currentColumn = columnName
	inCard = false
	cardBuffer.Reset()
	html.WriteString(fmt.Sprintf("<div class=\"column\"><h2>%s</h2>", columnName))
	} else if cardRegex.MatchString(line) {
	// If we are in a card, flush its contents
	if inCard {
	html.WriteString(fmt.Sprintf("<div class=\"card-body\">%s</div></div>", markdown.ToHTML([]byte(trimTabsLeftUpto(cardBuffer.String())), nil, nil)))
	cardBuffer.Reset()
	}
	// Start a new card
	matches := cardRegex.FindStringSubmatch(line)
	cardTitle := strings.TrimSpace(matches[1])
	html.WriteString(fmt.Sprintf("<div class=\"card\"><div class=\"card-title\">%s</div>", cardTitle))
	inCard = true
	} else if inCard {
	// Accumulate the card body content
	if len(line) > 0 {
	cardBuffer.WriteString(line + "\n")
	}
	}
	}

	// Close the last card and column divs if necessary
	if inCard {
	html.WriteString(fmt.Sprintf("<div class=\"card-body\">%s</div></div>", markdown.ToHTML([]byte(trimTabsLeftUpto(cardBuffer.String())), nil, nil)))
	}
	if currentColumn != "" {
	html.WriteString("</div>")
	}

	html.WriteString("</body></html>")
	return html.String()
	}

	func stripFrontMatter(lines []string) []string {
	if len(lines) > 0 && strings.TrimSpace(lines[0]) == "---" {
	for i := 1; i < len(lines); i++ {
	if strings.TrimSpace(lines[i]) == "---" {
	return lines[i+1:]
	}
	}
	}
	return lines
	}

	func trimTabsLeftUpto(lines string) string {
	res := strings.Builder{}
	leftMargin := 0

	for i, s := range strings.Split(lines, "\n") {
	if i == 0 {
	// Find the left margin
	for i, c := range s {
	if !unicode.IsSpace(c) {
	leftMargin = i
	break
	}
	}
	} else {
	res.WriteString("\n")
	}

	if leftMargin == 0 \|\| len(s) < leftMargin {
	res.WriteString(s)
	} else {
	res.WriteString(s[leftMargin:])
	}
	}

	return res.String()
	}