mirror of
https://github.com/gotenberg/gotenberg.git
synced 2026-07-02 08:27:41 +08:00
Piyush Srivastava
71911cb1a7
* add new metadata functions to pdf engine interface * add exiftool module with relevant test cases * use exiftool to overwrite metadata in libreoffice * use exiftool to overwrite metadata in chromium * fix linter issues * fix more linter issues * more test cases for better coverage * remove utils * minor changes * remove metadata from pdfoptions * correct indentation * read/write metadata one file at a time.
90 lines
3.0 KiB
Go
90 lines
3.0 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/v8/pkg/gotenberg"
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"github.com/gotenberg/gotenberg/v8/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 in this implementation.
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func (engine *LibreOfficePdfEngine) Merge(ctx context.Context, logger *zap.Logger, inputPaths []string, outputPath string) error {
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return fmt.Errorf("merge PDFs with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
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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-1b, PDF/A-2b, PDF/A-3b and PDF/UA formats are available. If another
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// PDF format is requested, it returns a [gotenberg.ErrPdfFormatNotSupported]
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// error.
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func (engine *LibreOfficePdfEngine) Convert(ctx context.Context, logger *zap.Logger, formats gotenberg.PdfFormats, inputPath, outputPath string) error {
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err := engine.unoApi.Pdf(ctx, logger, inputPath, outputPath, api.Options{
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PdfFormats: formats,
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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.ErrInvalidPdfFormats) {
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return fmt.Errorf("convert PDF to '%+v' with LibreOffice: %w", formats, gotenberg.ErrPdfFormatNotSupported)
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}
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return fmt.Errorf("convert PDF to '%+v' with LibreOffice: %w", formats, err)
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}
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// ReadMetadata is not available in this implementation.
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func (engine *LibreOfficePdfEngine) ReadMetadata(ctx context.Context, logger *zap.Logger, inputPaths string, metadata map[string]interface{}) error {
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return fmt.Errorf("read PDF metadata with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
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}
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// WriteMetadata is not available in this implementation.
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func (engine *LibreOfficePdfEngine) WriteMetadata(ctx context.Context, logger *zap.Logger, inputPaths string, newMetadata map[string]interface{}) error {
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return fmt.Errorf("write PDF metadata with LibreOffice: %w", gotenberg.ErrPdfEngineMethodNotSupported)
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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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