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79 lines
2.3 KiB
Go
79 lines
2.3 KiB
Go
package pdfengine
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import (
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"context"
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"errors"
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"fmt"
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"go.uber.org/zap"
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"github.com/gotenberg/gotenberg/v7/pkg/gotenberg"
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"github.com/gotenberg/gotenberg/v7/pkg/modules/libreoffice/api"
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)
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func init() {
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gotenberg.MustRegisterModule(new(LibreOfficePdfEngine))
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}
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// LibreOfficePdfEngine interacts with the LibreOffice (Universal Network Objects) API
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// and implements the [gotenberg.PDFEngine] interface.
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type LibreOfficePdfEngine struct {
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unoAPI api.Uno
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}
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// Descriptor returns a [LibreOfficePdfEngine]'s module descriptor.
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func (engine *LibreOfficePdfEngine) Descriptor() gotenberg.ModuleDescriptor {
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return gotenberg.ModuleDescriptor{
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ID: "libreoffice-pdfengine",
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New: func() gotenberg.Module { return new(LibreOfficePdfEngine) },
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}
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}
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// Provision sets the module properties.
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func (engine *LibreOfficePdfEngine) Provision(ctx *gotenberg.Context) error {
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provider, err := ctx.Module(new(api.Provider))
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if err != nil {
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return fmt.Errorf("get LibreOffice Uno provider: %w", err)
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}
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unoAPI, err := provider.(api.Provider).LibreOffice()
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if err != nil {
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return fmt.Errorf("get LibreOffice Uno: %w", err)
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}
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engine.unoAPI = unoAPI
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return nil
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}
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// Merge is not available for this PDF engine.
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func (engine *LibreOfficePdfEngine) Merge(_ context.Context, _ *zap.Logger, _ []string, _ string) error {
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return fmt.Errorf("merge PDFs with LibreOffice: %w", gotenberg.ErrPDFEngineMethodNotAvailable)
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}
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// Convert converts the given PDF to a specific PDF format. Currently, only the
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// PDF/A-1a, PDF/A-2b and PDF/A-3b formats are available. If another PDF format
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// is requested, it returns a [gotenberg.ErrPDFFormatNotAvailable] error.
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func (engine *LibreOfficePdfEngine) Convert(ctx context.Context, logger *zap.Logger, format, inputPath, outputPath string) error {
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err := engine.unoAPI.Pdf(ctx, logger, inputPath, outputPath, api.Options{
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PdfFormat: format,
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})
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if err == nil {
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return nil
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}
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if errors.Is(err, api.ErrInvalidPdfFormat) {
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return fmt.Errorf("convert PDF to '%s' with LibreOffice: %w", format, gotenberg.ErrPDFFormatNotAvailable)
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}
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return fmt.Errorf("convert PDF to '%s' with unoconv: %w", format, err)
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}
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// Interface guards.
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var (
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_ gotenberg.Module = (*LibreOfficePdfEngine)(nil)
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_ gotenberg.Provisioner = (*LibreOfficePdfEngine)(nil)
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_ gotenberg.PDFEngine = (*LibreOfficePdfEngine)(nil)
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)
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