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82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
package printer
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import (
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"context"
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"github.com/thecodingmachine/gotenberg/internal/pkg/conf"
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"github.com/thecodingmachine/gotenberg/internal/pkg/xcontext"
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"github.com/thecodingmachine/gotenberg/internal/pkg/xerror"
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"github.com/thecodingmachine/gotenberg/internal/pkg/xexec"
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"github.com/thecodingmachine/gotenberg/internal/pkg/xlog"
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)
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type mergePrinter struct {
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ctx context.Context
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logger xlog.Logger
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fpaths []string
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opts MergePrinterOptions
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}
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// MergePrinterOptions helps customizing the
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// merge Printer behaviour.
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type MergePrinterOptions struct {
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WaitTimeout float64
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}
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// DefaultMergePrinterOptions returns the default
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// merge Printer options.
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func DefaultMergePrinterOptions(config conf.Config) MergePrinterOptions {
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return MergePrinterOptions{
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WaitTimeout: config.DefaultWaitTimeout(),
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}
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}
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// NewMergePrinter returns a Printer which
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// is able to merge PDFs.
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func NewMergePrinter(logger xlog.Logger, fpaths []string, opts MergePrinterOptions) Printer {
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return mergePrinter{
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logger: logger,
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fpaths: fpaths,
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opts: opts,
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}
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}
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func (p mergePrinter) Print(destination string) error {
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const op string = "printer.mergePrinter.Print"
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/*
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context.Context may be providen from
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an officePrinter which needs to merge
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its result files.
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*/
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if p.ctx == nil {
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logOptions(p.logger, p.opts)
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ctx, cancel := xcontext.WithTimeout(p.logger, p.opts.WaitTimeout)
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defer cancel()
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p.ctx = ctx
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}
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p.logger.DebugfOp(op, "merging '%v'...", p.fpaths)
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resolver := func() error {
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var args []string
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args = append(args, p.fpaths...)
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args = append(args, "cat", "output", destination)
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cmd, err := xexec.CommandContext(p.ctx, p.logger, "pdftk", args...)
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if err != nil {
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return err
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}
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xexec.LogBeforeExecute(p.logger, cmd)
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return cmd.Run()
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}
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if err := resolver(); err != nil {
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return xcontext.MustHandleError(
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p.ctx,
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xerror.New(op, err),
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)
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}
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return nil
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}
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// Compile-time checks to ensure type implements desired interfaces.
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var (
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_ = Printer(new(mergePrinter))
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)
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