feat: add 7.x source code

pkg/modules/pdfcpu/pdfcpu.go

@@ -0,0 +1,62 @@
+package pdfcpu
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
+	pdfcpuAPI "github.com/pdfcpu/pdfcpu/pkg/api"
+	pdfcpuLog "github.com/pdfcpu/pdfcpu/pkg/log"
+	pdfcpuConfig "github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
+	"go.uber.org/zap"
+)
+
+func init() {
+	gotenberg.MustRegisterModule(PDFcpu{})
+}
+
+// PDFcpu is a module which wraps the https://github.com/pdfcpu/pdfcpu library
+// and implements the gotenberg.PDFEngine interface.
+type PDFcpu struct {
+	conf *pdfcpuConfig.Configuration
+}
+
+// Descriptor returns a PDFcpu's module descriptor.
+func (engine PDFcpu) Descriptor() gotenberg.ModuleDescriptor {
+	return gotenberg.ModuleDescriptor{
+		ID:  "pdfcpu",
+		New: func() gotenberg.Module { return new(PDFcpu) },
+	}
+}
+
+// Provision sets the engine properties.
+func (engine *PDFcpu) Provision(_ *gotenberg.Context) error {
+	pdfcpuConfig.ConfigPath = "disable"
+	pdfcpuLog.DisableLoggers()
+
+	engine.conf = pdfcpuConfig.NewDefaultConfiguration()
+
+	return nil
+}
+
+// Merge merges the given PDFs into a unique PDF.
+func (engine PDFcpu) Merge(_ context.Context, _ *zap.Logger, inputPaths []string, outputPath string) error {
+	err := pdfcpuAPI.MergeCreateFile(inputPaths, outputPath, engine.conf)
+	if err == nil {
+		return nil
+	}
+
+	return fmt.Errorf("merge PDFs with PDFcpu: %w", err)
+}
+
+// Convert is not available for this PDF engine.
+func (engine PDFcpu) Convert(_ context.Context, _ *zap.Logger, format, _, _ string) error {
+	return fmt.Errorf("convert PDF to '%s' with PDFcpu: %w", format, gotenberg.ErrPDFEngineMethodNotAvailable)
+}
+
+// Interface guards.
+var (
+	_ gotenberg.Module      = (*PDFcpu)(nil)
+	_ gotenberg.Provisioner = (*PDFcpu)(nil)
+	_ gotenberg.PDFEngine   = (*PDFcpu)(nil)
+)