92 lines
2.9 KiB
Go
92 lines
2.9 KiB
Go
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//go:build never
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// +build never
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package pdf
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import (
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"fmt"
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"os"
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"path/filepath"
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api "github.com/pdfcpu/pdfcpu/pkg/api"
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)
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// finalizeWithTerms tries to append the standard Terms & Conditions PDF
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// to the generated document. If the terms file doesn't exist or is encrypted
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// and merge fails, this returns an error and the caller may decide to fallback.
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//
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// outputDir: directory where PDFs live (e.g., webroot/pdf)
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// tmpFilename: temporary file name of the generated document (relative to outputDir)
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// finalFilename: final output file name (relative to outputDir)
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func FinalizeWithTerms(outputDir, tmpFilename, finalFilename string) error {
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tmpPath := filepath.Join(outputDir, tmpFilename)
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finalPath := filepath.Join(outputDir, finalFilename)
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// Standard T&C file used by legacy PHP flow
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termsPath := filepath.Join(outputDir, "CMC_terms_and_conditions2006_A4.pdf")
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if _, err := os.Stat(termsPath); err != nil {
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// Terms file missing: just rename tmp to final
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return FallbackFinalize(outputDir, tmpFilename, finalFilename)
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}
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// Merge tmp (first) + terms (second) into final
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inputs := []string{tmpPath, termsPath}
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if err := api.MergeCreateFile(inputs, finalPath, nil); err != nil {
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// Merge failed (possibly encrypted terms). Return error so caller can fallback
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return fmt.Errorf("pdf merge failed: %w", err)
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}
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// Cleanup tmp file on success
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_ = os.Remove(tmpPath)
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return nil
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}
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// finalizeWithTermsAndExtras is like finalizeWithTerms but allows appending additional PDFs.
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// extras should be absolute or relative to outputDir. Non-existent extras are ignored.
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func FinalizeWithTermsAndExtras(outputDir, tmpFilename, finalFilename string, extras []string) error {
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tmpPath := filepath.Join(outputDir, tmpFilename)
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finalPath := filepath.Join(outputDir, finalFilename)
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// Base inputs: generated document
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inputs := []string{tmpPath}
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// Optional terms
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termsPath := filepath.Join(outputDir, "CMC_terms_and_conditions2006_A4.pdf")
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if _, err := os.Stat(termsPath); err == nil {
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inputs = append(inputs, termsPath)
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}
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// Append any extra files (if they exist)
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for _, p := range extras {
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ap := p
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if !filepath.IsAbs(ap) {
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ap = filepath.Join(outputDir, p)
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}
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if _, err := os.Stat(ap); err == nil {
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inputs = append(inputs, ap)
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}
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}
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// If we only have the tmp file, just rename
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if len(inputs) == 1 {
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return FallbackFinalize(outputDir, tmpFilename, finalFilename)
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}
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if err := api.MergeCreateFile(inputs, finalPath, nil); err != nil {
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return fmt.Errorf("pdf merge failed: %w", err)
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}
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_ = os.Remove(tmpPath)
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return nil
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}
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// fallbackFinalize renames the tmp file to the final filename, overwriting if needed.
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func FallbackFinalize(outputDir, tmpFilename, finalFilename string) error {
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tmpPath := filepath.Join(outputDir, tmpFilename)
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finalPath := filepath.Join(outputDir, finalFilename)
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// Remove any existing final file
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_ = os.Remove(finalPath)
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return os.Rename(tmpPath, finalPath)
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}
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