v3.0.0 (#18)

internal/pkg/printer/printer.go

@@ -0,0 +1,29 @@
+package printer
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	pdfcpuAPI "github.com/hhrutter/pdfcpu/pkg/api"
+	pdfcpuConfig "github.com/hhrutter/pdfcpu/pkg/pdfcpu"
+)
+
+// Printer is a type that can create a PDF file from a source.
+// The source is defined in the underlying implementation.
+type Printer interface {
+	Print(destination string) error
+}
+
+// Merge merges PDF files.
+func Merge(fpaths []string, destination string) error {
+	cmd := pdfcpuAPI.MergeCommand(fpaths, destination, pdfcpuConfig.NewDefaultConfiguration())
+	_, err := pdfcpuAPI.Merge(cmd)
+	return err
+}
+
+func writeBytesToFile(dst string, b []byte) error {
+	if err := ioutil.WriteFile(dst, b, 0644); err != nil {
+		return fmt.Errorf("%s: writting file: %v", dst, err)
+	}
+	return nil
+}