feat(release): beelloo v0.1

internal/render/render.go

@@ -0,0 +1,103 @@
+package render
+
+import (
+	"bytes"
+	"embed"
+	"html/template"
+	"time"
+
+	"github.com/russross/blackfriday/v2"
+
+	"beelloo/internal/invoice"
+)
+
+//go:embed template.html style.css
+var assets embed.FS
+
+type renderItem struct {
+	Designation template.HTML
+	UnitPrice   string
+	Quantity    string
+	Amount      string
+}
+
+type renderData struct {
+	Seller             invoice.Party
+	Buyer              invoice.Party
+	Invoice            invoice.InvoiceInfo
+	InvoiceDate        string
+	InvoiceDescription template.HTML
+	Items              []renderItem
+	TotalExclTax       string
+	Payment            invoice.PaymentInfo
+	CSS                template.CSS
+	CSSHref            string
+}
+
+func RenderHTML(doc invoice.Document) (string, error) {
+	cssBytes, err := assets.ReadFile("style.css")
+	if err != nil {
+		return "", err
+	}
+	return RenderHTMLWithCSS(doc, string(cssBytes))
+}
+
+func RenderHTMLWithCSS(doc invoice.Document, css string) (string, error) {
+	return renderHTML(doc, css, "")
+}
+
+func RenderHTMLWithCSSLink(doc invoice.Document, href string) (string, error) {
+	return renderHTML(doc, "", href)
+}
+
+func renderHTML(doc invoice.Document, css string, href string) (string, error) {
+	invoice.ComputeTotals(&doc)
+	tmplBytes, err := assets.ReadFile("template.html")
+	if err != nil {
+		return "", err
+	}
+	tmpl, err := template.New("invoice").Parse(string(tmplBytes))
+	if err != nil {
+		return "", err
+	}
+	data := renderData{
+		Seller:             doc.Seller,
+		Buyer:              doc.Buyer,
+		Invoice:            doc.Invoice,
+		InvoiceDate:        formatDate(doc.Invoice.Date),
+		InvoiceDescription: markdownHTML(doc.Invoice.Description),
+		TotalExclTax:       invoice.FormatMoney(doc.Totals.TotalExclTax),
+		Payment:            doc.Payment,
+		CSS:                template.CSS(css),
+		CSSHref:            href,
+	}
+	for _, item := range doc.Items {
+		data.Items = append(data.Items, renderItem{
+			Designation: markdownHTML(item.Designation),
+			UnitPrice:   invoice.FormatMoney(item.UnitPrice),
+			Quantity:    invoice.FormatQuantity(item.Quantity),
+			Amount:      invoice.FormatMoney(invoice.LineAmount(item)),
+		})
+	}
+	var buf bytes.Buffer
+	if err := tmpl.Execute(&buf, data); err != nil {
+		return "", err
+	}
+	return buf.String(), nil
+}
+
+func DefaultCSS() ([]byte, error) {
+	return assets.ReadFile("style.css")
+}
+
+func markdownHTML(input string) template.HTML {
+	output := blackfriday.Run([]byte(input))
+	return template.HTML(output)
+}
+
+func formatDate(date time.Time) string {
+	if date.IsZero() {
+		return ""
+	}
+	return date.Format("02/01/2006")
+}