Merge remote-tracking branch 'origin/master'

svc/routes/pdf_assets.go

@@ -0,0 +1,85 @@
+package routes
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/jung-kurt/gofpdf"
+)
+
+func resolvePdfAssetPath(fileName string) (string, error) {
+	return resolveAssetPath(fileName, []string{
+		"fonts",
+		filepath.Join("svc", "fonts"),
+	})
+}
+
+func resolvePdfImagePath(fileName string) (string, error) {
+	return resolveAssetPath(fileName, []string{
+		"public",
+		filepath.Join("svc", "public"),
+	})
+}
+
+func resolveAssetPath(fileName string, relativeDirs []string) (string, error) {
+	candidates := make([]string, 0, len(relativeDirs)*3)
+	for _, dir := range relativeDirs {
+		candidates = append(candidates,
+			filepath.Join(dir, fileName),
+			filepath.Join(".", dir, fileName),
+			filepath.Join("..", dir, fileName),
+		)
+	}
+
+	if exePath, err := os.Executable(); err == nil {
+		exeDir := filepath.Dir(exePath)
+		for _, dir := range relativeDirs {
+			candidates = append(candidates,
+				filepath.Join(exeDir, dir, fileName),
+				filepath.Join(exeDir, "..", dir, fileName),
+			)
+		}
+	}
+
+	seen := map[string]struct{}{}
+	tried := make([]string, 0, len(candidates))
+
+	for _, p := range candidates {
+		if abs, err := filepath.Abs(p); err == nil {
+			p = abs
+		}
+
+		if _, ok := seen[p]; ok {
+			continue
+		}
+		seen[p] = struct{}{}
+		tried = append(tried, p)
+
+		if fi, err := os.Stat(p); err == nil && !fi.IsDir() {
+			return p, nil
+		}
+	}
+
+	return "", fmt.Errorf("asset not found: %s (tried: %s)", fileName, strings.Join(tried, ", "))
+}
+
+func registerDejavuFonts(pdf *gofpdf.Fpdf, regularFamily, boldFamily string) error {
+	regularFont, err := resolvePdfAssetPath("DejaVuSans.ttf")
+	if err != nil {
+		return err
+	}
+	boldFont, err := resolvePdfAssetPath("DejaVuSans-Bold.ttf")
+	if err != nil {
+		return err
+	}
+
+	pdf.AddUTF8Font(regularFamily, "", regularFont)
+	pdf.AddUTF8Font(boldFamily, "", boldFont)
+
+	if err := pdf.Error(); err != nil {
+		return fmt.Errorf("font init failed: %w", err)
+	}
+	return nil
+}