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process.go
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process.go
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/*
Copyright 2020 The pdfcpu Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package main
import (
"bytes"
"flag"
"fmt"
"io"
"os"
"path/filepath"
"regexp"
"runtime"
"runtime/debug"
"sort"
"strconv"
"strings"
"github.com/pdfcpu/pdfcpu/pkg/api"
"github.com/pdfcpu/pdfcpu/pkg/cli"
"github.com/pdfcpu/pdfcpu/pkg/pdfcpu"
"github.com/pdfcpu/pdfcpu/pkg/pdfcpu/model"
"github.com/pdfcpu/pdfcpu/pkg/pdfcpu/types"
"github.com/pdfcpu/pdfcpu/pkg/pdfcpu/validate"
"github.com/pkg/errors"
)
var errInvalidBookletID = errors.New("pdfcpu: booklet: n: one of 2, 4")
func hasPDFExtension(filename string) bool {
return strings.HasSuffix(strings.ToLower(filename), ".pdf")
}
func ensurePDFExtension(filename string) {
if !hasPDFExtension(filename) {
fmt.Fprintf(os.Stderr, "%s needs extension \".pdf\".\n", filename)
os.Exit(1)
}
}
func hasJSONExtension(filename string) bool {
return strings.HasSuffix(strings.ToLower(filename), ".json")
}
func ensureJSONExtension(filename string) {
if !hasJSONExtension(filename) {
fmt.Fprintf(os.Stderr, "%s needs extension \".json\".\n", filename)
os.Exit(1)
}
}
func hasCSVExtension(filename string) bool {
return strings.HasSuffix(strings.ToLower(filename), ".csv")
}
func ensureCSVExtension(filename string) {
if !hasCSVExtension(filename) {
fmt.Fprintf(os.Stderr, "%s needs extension \".csv\".\n", filename)
os.Exit(1)
}
}
func printHelp(conf *model.Configuration) {
switch len(flag.Args()) {
case 0:
fmt.Fprintln(os.Stderr, usage)
case 1:
s, err := cmdMap.HelpString(flag.Arg(0))
if err != nil {
fmt.Fprintln(os.Stderr, err)
}
fmt.Fprintln(os.Stderr, s)
default:
fmt.Fprintln(os.Stderr, "usage: pdfcpu help command\n\nToo many arguments.")
}
}
func printConfiguration(conf *model.Configuration) {
fmt.Fprintf(os.Stdout, "config: %s\n", conf.Path)
f, err := os.Open(conf.Path)
if err != nil {
fmt.Fprintf(os.Stderr, "can't open %s", conf.Path)
os.Exit(1)
}
defer f.Close()
var buf bytes.Buffer
if _, err := io.Copy(&buf, f); err != nil {
fmt.Fprintf(os.Stderr, "can't read %s", conf.Path)
os.Exit(1)
}
fmt.Print(string(buf.String()))
}
func printPaperSizes(conf *model.Configuration) {
fmt.Fprintln(os.Stderr, paperSizes)
}
func printSelectedPages(conf *model.Configuration) {
fmt.Fprintln(os.Stderr, usagePageSelection)
}
func printVersion(conf *model.Configuration) {
if len(flag.Args()) != 0 {
fmt.Fprintf(os.Stderr, "%s\n\n", usageVersion)
os.Exit(1)
}
fmt.Fprintf(os.Stdout, "pdfcpu: %s\n", model.VersionStr)
if date == "?" {
if info, ok := debug.ReadBuildInfo(); ok {
for _, setting := range info.Settings {
if setting.Key == "vcs.revision" {
commit = setting.Value
if len(commit) >= 8 {
commit = commit[:8]
}
}
if setting.Key == "vcs.time" {
date = setting.Value
}
}
}
}
fmt.Fprintf(os.Stdout, "commit: %s (%s)\n", commit, date)
fmt.Fprintf(os.Stdout, "base : %s\n", runtime.Version())
fmt.Fprintf(os.Stdout, "config: %s\n", conf.Path)
}
func process(cmd *cli.Command) {
out, err := cli.Process(cmd)
if err != nil {
if needStackTrace {
fmt.Fprintf(os.Stderr, "Fatal: %+v\n", err)
} else {
fmt.Fprintf(os.Stderr, "%v\n", err)
}
os.Exit(1)
}
if out != nil && !quiet {
for _, s := range out {
fmt.Fprintln(os.Stdout, s)
}
}
//os.Exit(0)
}
func processValidateCommand(conf *model.Configuration) {
if len(flag.Args()) == 0 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageValidate)
os.Exit(1)
}
inFiles := []string{}
for _, arg := range flag.Args() {
if strings.Contains(arg, "*") {
matches, err := filepath.Glob(arg)
if err != nil {
fmt.Fprintf(os.Stderr, "%s", err)
os.Exit(1)
}
inFiles = append(inFiles, matches...)
continue
}
if conf.CheckFileNameExt {
ensurePDFExtension(arg)
}
inFiles = append(inFiles, arg)
}
if mode != "" && mode != "strict" && mode != "s" && mode != "relaxed" && mode != "r" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageValidate)
os.Exit(1)
}
switch mode {
case "strict", "s":
conf.ValidationMode = model.ValidationStrict
case "relaxed", "r":
conf.ValidationMode = model.ValidationRelaxed
}
if links {
conf.ValidateLinks = true
}
process(cli.ValidateCommand(inFiles, conf))
}
func processOptimizeCommand(conf *model.Configuration) {
if len(flag.Args()) == 0 || len(flag.Args()) > 2 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageOptimize)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outFile := inFile
if len(flag.Args()) == 2 {
outFile = flag.Arg(1)
ensurePDFExtension(outFile)
}
conf.StatsFileName = fileStats
if len(fileStats) > 0 {
fmt.Fprintf(os.Stdout, "stats will be appended to %s\n", fileStats)
}
process(cli.OptimizeCommand(inFile, outFile, conf))
}
func processSplitByPageNumberCommand(inFile, outDir string, conf *model.Configuration) {
if len(flag.Args()) == 2 {
fmt.Fprintln(os.Stderr, "split: missing page numbers")
os.Exit(1)
}
ii := types.IntSet{}
for i := 2; i < len(flag.Args()); i++ {
p, err := strconv.Atoi(flag.Arg(i))
if err != nil || p < 2 {
fmt.Fprintln(os.Stderr, "split: pageNr is a numeric value >= 2")
os.Exit(1)
}
ii[p] = true
}
pageNrs := make([]int, 0, len(ii))
for k := range ii {
pageNrs = append(pageNrs, k)
}
sort.Ints(pageNrs)
process(cli.SplitByPageNrCommand(inFile, outDir, pageNrs, conf))
}
func processSplitCommand(conf *model.Configuration) {
if mode == "" {
mode = "span"
}
mode = modeCompletion(mode, []string{"span", "bookmark", "page"})
if mode == "" || len(flag.Args()) < 2 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageSplit)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outDir := flag.Arg(1)
if mode == "page" {
processSplitByPageNumberCommand(inFile, outDir, conf)
return
}
span := 0
if mode == "span" {
span = 1
var err error
if len(flag.Args()) == 3 {
span, err = strconv.Atoi(flag.Arg(2))
if err != nil || span < 1 {
fmt.Fprintln(os.Stderr, "split: span is a numeric value >= 1")
os.Exit(1)
}
}
}
process(cli.SplitCommand(inFile, outDir, span, conf))
}
func sortFiles(inFiles []string) {
// See PR #631
re := regexp.MustCompile(`\d+`)
sort.Slice(
inFiles,
func(i, j int) bool {
ssi := re.FindAllString(inFiles[i], 1)
ssj := re.FindAllString(inFiles[j], 1)
if len(ssi) == 0 || len(ssj) == 0 {
return inFiles[i] <= inFiles[j]
}
i1, _ := strconv.Atoi(ssi[0])
i2, _ := strconv.Atoi(ssj[0])
return i1 < i2
})
}
func processArgsForMerge(conf *model.Configuration) ([]string, string) {
inFiles := []string{}
outFile := ""
for i, arg := range flag.Args() {
if i == 0 {
ensurePDFExtension(arg)
outFile = arg
continue
}
if arg == outFile {
fmt.Fprintf(os.Stderr, "%s may appear as inFile or outFile only\n", outFile)
os.Exit(1)
}
if mode != "zip" && strings.Contains(arg, "*") {
matches, err := filepath.Glob(arg)
if err != nil {
fmt.Fprintf(os.Stderr, "%s", err)
os.Exit(1)
}
inFiles = append(inFiles, matches...)
continue
}
if conf.CheckFileNameExt {
ensurePDFExtension(arg)
}
inFiles = append(inFiles, arg)
}
return inFiles, outFile
}
func processMergeCommand(conf *model.Configuration) {
if mode == "" {
mode = "create"
}
mode = modeCompletion(mode, []string{"create", "append", "zip"})
if mode == "" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageMerge)
os.Exit(1)
}
if len(flag.Args()) < 2 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageMerge)
os.Exit(1)
}
if mode == "zip" && len(flag.Args()) != 3 {
fmt.Fprintf(os.Stderr, "merge zip: expecting outFile inFile1 inFile2\n")
os.Exit(1)
}
if mode == "zip" && dividerPage {
fmt.Fprintf(os.Stderr, "merge zip: -d(ivider) not applicable and will be ignored\n")
}
inFiles, outFile := processArgsForMerge(conf)
if sorted {
sortFiles(inFiles)
}
if conf == nil {
conf = model.NewDefaultConfiguration()
conf.CreateBookmarks = bookmarks
}
conf.CreateBookmarks = bookmarks
var cmd *cli.Command
switch mode {
case "create":
cmd = cli.MergeCreateCommand(inFiles, outFile, dividerPage, conf)
case "zip":
cmd = cli.MergeCreateZipCommand(inFiles, outFile, conf)
case "append":
cmd = cli.MergeAppendCommand(inFiles, outFile, dividerPage, conf)
}
process(cmd)
}
func modeCompletion(modePrefix string, modes []string) string {
var modeStr string
for _, mode := range modes {
if !strings.HasPrefix(mode, modePrefix) {
continue
}
if len(modeStr) > 0 {
return ""
}
modeStr = mode
}
return modeStr
}
func processExtractCommand(conf *model.Configuration) {
mode = modeCompletion(mode, []string{"image", "font", "page", "content", "meta"})
if len(flag.Args()) != 2 || mode == "" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageExtract)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outDir := flag.Arg(1)
pages, err := api.ParsePageSelection(selectedPages)
if err != nil {
fmt.Fprintf(os.Stderr, "problem with flag selectedPages: %v\n", err)
os.Exit(1)
}
var cmd *cli.Command
switch mode {
case "image":
cmd = cli.ExtractImagesCommand(inFile, outDir, pages, conf)
case "font":
cmd = cli.ExtractFontsCommand(inFile, outDir, pages, conf)
case "page":
cmd = cli.ExtractPagesCommand(inFile, outDir, pages, conf)
case "content":
cmd = cli.ExtractContentCommand(inFile, outDir, pages, conf)
case "meta":
cmd = cli.ExtractMetadataCommand(inFile, outDir, conf)
default:
fmt.Fprintf(os.Stderr, "unknown extract mode: %s\n", mode)
os.Exit(1)
}
process(cmd)
}
func processTrimCommand(conf *model.Configuration) {
if len(flag.Args()) == 0 || len(flag.Args()) > 2 || selectedPages == "" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageTrim)
os.Exit(1)
}
pages, err := api.ParsePageSelection(selectedPages)
if err != nil {
fmt.Fprintf(os.Stderr, "problem with flag selectedPages: %v\n", err)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outFile := ""
if len(flag.Args()) == 2 {
outFile = flag.Arg(1)
ensurePDFExtension(outFile)
}
process(cli.TrimCommand(inFile, outFile, pages, conf))
}
func processListAttachmentsCommand(conf *model.Configuration) {
if len(flag.Args()) != 1 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "usage: %s\n", usageAttachList)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
process(cli.ListAttachmentsCommand(inFile, conf))
}
func processAddAttachmentsCommand(conf *model.Configuration) {
if len(flag.Args()) < 2 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "usage: %s\n\n", usageAttachAdd)
os.Exit(1)
}
var inFile string
fileNames := []string{}
for i, arg := range flag.Args() {
if i == 0 {
inFile = arg
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
continue
}
if strings.Contains(arg, "*") {
matches, err := filepath.Glob(arg)
if err != nil {
fmt.Fprintf(os.Stderr, "%s", err)
os.Exit(1)
}
fileNames = append(fileNames, matches...)
continue
}
fileNames = append(fileNames, arg)
}
process(cli.AddAttachmentsCommand(inFile, "", fileNames, conf))
}
func processAddAttachmentsPortfolioCommand(conf *model.Configuration) {
if len(flag.Args()) < 2 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "usage: %s\n\n", usageAttachAdd)
os.Exit(1)
}
var inFile string
fileNames := []string{}
for i, arg := range flag.Args() {
if i == 0 {
inFile = arg
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
continue
}
if strings.Contains(arg, "*") {
matches, err := filepath.Glob(arg)
if err != nil {
fmt.Fprintf(os.Stderr, "%s", err)
os.Exit(1)
}
fileNames = append(fileNames, matches...)
continue
}
fileNames = append(fileNames, arg)
}
process(cli.AddAttachmentsPortfolioCommand(inFile, "", fileNames, conf))
}
func processRemoveAttachmentsCommand(conf *model.Configuration) {
if len(flag.Args()) < 1 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "usage: %s\n\n", usageAttachRemove)
os.Exit(1)
}
var inFile string
fileNames := []string{}
for i, arg := range flag.Args() {
if i == 0 {
inFile = arg
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
continue
}
fileNames = append(fileNames, arg)
}
process(cli.RemoveAttachmentsCommand(inFile, "", fileNames, conf))
}
func processExtractAttachmentsCommand(conf *model.Configuration) {
if len(flag.Args()) < 2 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "usage: %s\n\n", usageAttachExtract)
os.Exit(1)
}
var inFile string
fileNames := []string{}
var outDir string
for i, arg := range flag.Args() {
if i == 0 {
inFile = arg
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
continue
}
if i == 1 {
outDir = arg
continue
}
fileNames = append(fileNames, arg)
}
process(cli.ExtractAttachmentsCommand(inFile, outDir, fileNames, conf))
}
func processListPermissionsCommand(conf *model.Configuration) {
if len(flag.Args()) == 0 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "usage: %s\n", usagePermList)
os.Exit(1)
}
inFiles := []string{}
for _, arg := range flag.Args() {
if strings.Contains(arg, "*") {
matches, err := filepath.Glob(arg)
if err != nil {
fmt.Fprintf(os.Stderr, "%s", err)
os.Exit(1)
}
inFiles = append(inFiles, matches...)
continue
}
if conf.CheckFileNameExt {
ensurePDFExtension(arg)
}
inFiles = append(inFiles, arg)
}
process(cli.ListPermissionsCommand(inFiles, conf))
}
func permCompletion(permPrefix string) string {
for _, perm := range []string{"none", "print", "all"} {
if !strings.HasPrefix(perm, permPrefix) {
continue
}
return perm
}
return permPrefix
}
func isBinary(s string) bool {
_, err := strconv.ParseUint(s, 2, 12)
return err == nil
}
func isHex(s string) bool {
if s[0] != 'x' {
return false
}
s = s[1:]
_, err := strconv.ParseUint(s, 16, 16)
return err == nil
}
func configPerm(perm string, conf *model.Configuration) {
if perm != "" {
switch perm {
case "none":
conf.Permissions = model.PermissionsNone
case "print":
conf.Permissions = model.PermissionsPrint
case "all":
conf.Permissions = model.PermissionsAll
default:
var p uint64
if perm[0] == 'x' {
p, _ = strconv.ParseUint(perm[1:], 16, 16)
} else {
p, _ = strconv.ParseUint(perm, 2, 12)
}
conf.Permissions = model.PermissionFlags(p)
}
}
}
func processSetPermissionsCommand(conf *model.Configuration) {
if perm != "" {
perm = permCompletion(perm)
}
if len(flag.Args()) != 1 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "usage: %s\n\n", usagePermSet)
os.Exit(1)
}
if perm != "" && perm != "none" && perm != "print" && perm != "all" && !isBinary(perm) && !isHex(perm) {
fmt.Fprintf(os.Stderr, "usage: %s\n\n", usagePermSet)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
configPerm(perm, conf)
process(cli.SetPermissionsCommand(inFile, "", conf))
}
func processDecryptCommand(conf *model.Configuration) {
if len(flag.Args()) == 0 || len(flag.Args()) > 2 || selectedPages != "" {
fmt.Fprintf(os.Stderr, "%s\n\n", usageDecrypt)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outFile := inFile
if len(flag.Args()) == 2 {
outFile = flag.Arg(1)
ensurePDFExtension(outFile)
}
process(cli.DecryptCommand(inFile, outFile, conf))
}
func validateEncryptModeFlag() {
if !types.MemberOf(mode, []string{"rc4", "aes", ""}) {
fmt.Fprintf(os.Stderr, "%s\n\n", "valid modes: rc4,aes default:aes")
os.Exit(1)
}
// Default to AES encryption.
if mode == "" {
mode = "aes"
}
if key == "256" && mode == "rc4" {
key = "128"
}
if mode == "rc4" {
if key != "40" && key != "128" && key != "" {
fmt.Fprintf(os.Stderr, "%s\n\n", "supported RC4 key lengths: 40,128 default:128")
os.Exit(1)
}
}
if mode == "aes" {
if key != "40" && key != "128" && key != "256" && key != "" {
fmt.Fprintf(os.Stderr, "%s\n\n", "supported AES key lengths: 40,128,256 default:256")
os.Exit(1)
}
}
}
func validateEncryptFlags() {
validateEncryptModeFlag()
if perm != "none" && perm != "print" && perm != "all" && perm != "" {
fmt.Fprintf(os.Stderr, "%s\n\n", "supported permissions: none,print,all default:none (viewing always allowed!)")
os.Exit(1)
}
}
func processEncryptCommand(conf *model.Configuration) {
if perm != "" {
perm = permCompletion(perm)
}
if len(flag.Args()) == 0 || len(flag.Args()) > 2 ||
!(perm == "none" || perm == "print" || perm == "all") {
fmt.Fprintf(os.Stderr, "%s\n\n", usageEncrypt)
os.Exit(1)
}
if conf.OwnerPW == "" {
fmt.Fprintln(os.Stderr, "missing non-empty owner password!")
fmt.Fprintf(os.Stderr, "%s\n\n", usageEncrypt)
os.Exit(1)
}
validateEncryptFlags()
if perm != "" {
perm = permCompletion(perm)
}
conf.EncryptUsingAES = mode != "rc4"
kl, _ := strconv.Atoi(key)
conf.EncryptKeyLength = kl
if perm == "all" {
conf.Permissions = model.PermissionsAll
}
if perm == "print" {
conf.Permissions = model.PermissionsPrint
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outFile := inFile
if len(flag.Args()) == 2 {
outFile = flag.Arg(1)
ensurePDFExtension(outFile)
}
process(cli.EncryptCommand(inFile, outFile, conf))
}
func processChangeUserPasswordCommand(conf *model.Configuration) {
if len(flag.Args()) != 3 {
fmt.Fprintf(os.Stderr, "%s\n\n", usageChangeUserPW)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outFile := inFile
if len(flag.Args()) == 2 {
outFile = flag.Arg(1)
ensurePDFExtension(outFile)
}
pwOld := flag.Arg(1)
pwNew := flag.Arg(2)
process(cli.ChangeUserPWCommand(inFile, outFile, &pwOld, &pwNew, conf))
}
func processChangeOwnerPasswordCommand(conf *model.Configuration) {
if len(flag.Args()) != 3 {
fmt.Fprintf(os.Stderr, "%s\n\n", usageChangeOwnerPW)
os.Exit(1)
}
inFile := flag.Arg(0)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outFile := inFile
if len(flag.Args()) == 2 {
outFile = flag.Arg(1)
ensurePDFExtension(outFile)
}
pwOld := flag.Arg(1)
pwNew := flag.Arg(2)
if pwNew == "" {
fmt.Fprintf(os.Stderr, "owner password cannot be empty")
fmt.Fprintf(os.Stderr, "%s\n\n", usageChangeOwnerPW)
os.Exit(1)
}
process(cli.ChangeOwnerPWCommand(inFile, outFile, &pwOld, &pwNew, conf))
}
func addWatermarks(conf *model.Configuration, onTop bool) {
u := usageWatermarkAdd
if onTop {
u = usageStampAdd
}
if len(flag.Args()) < 3 || len(flag.Args()) > 4 {
fmt.Fprintf(os.Stderr, "usage: %s\n\n", u)
os.Exit(1)
}
if mode != "text" && mode != "image" && mode != "pdf" {
fmt.Fprintln(os.Stderr, "mode has to be one of: text, image or pdf")
os.Exit(1)
}
processDiplayUnit(conf)
var (
wm *model.Watermark
err error
)
switch mode {
case "text":
wm, err = pdfcpu.ParseTextWatermarkDetails(flag.Arg(0), flag.Arg(1), onTop, conf.Unit)
case "image":
wm, err = pdfcpu.ParseImageWatermarkDetails(flag.Arg(0), flag.Arg(1), onTop, conf.Unit)
case "pdf":
wm, err = pdfcpu.ParsePDFWatermarkDetails(flag.Arg(0), flag.Arg(1), onTop, conf.Unit)
default:
err = errors.Errorf("unsupported wm type: %s\n", mode)
}
if err != nil {
fmt.Fprintf(os.Stderr, "%v\n", err)
os.Exit(1)
}
selectedPages, err := api.ParsePageSelection(selectedPages)
if err != nil {
fmt.Fprintf(os.Stderr, "problem with flag selectedPages: %v", err)
os.Exit(1)
}
inFile := flag.Arg(2)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outFile := ""
if len(flag.Args()) == 4 {
outFile = flag.Arg(3)
ensurePDFExtension(outFile)
}
process(cli.AddWatermarksCommand(inFile, outFile, selectedPages, wm, conf))
}
func processAddStampsCommand(conf *model.Configuration) {
addWatermarks(conf, true)
}
func processAddWatermarksCommand(conf *model.Configuration) {
addWatermarks(conf, false)
}
func updateWatermarks(conf *model.Configuration, onTop bool) {
u := usageWatermarkUpdate
if onTop {
u = usageStampUpdate
}
if len(flag.Args()) < 3 || len(flag.Args()) > 4 {
fmt.Fprintf(os.Stderr, "%s\n\n", u)
os.Exit(1)
}
if mode != "text" && mode != "image" && mode != "pdf" {
fmt.Fprintf(os.Stderr, "%s\n\n", u)
os.Exit(1)
}
processDiplayUnit(conf)
var (
wm *model.Watermark
err error
)
switch mode {
case "text":
wm, err = pdfcpu.ParseTextWatermarkDetails(flag.Arg(0), flag.Arg(1), onTop, conf.Unit)
case "image":
wm, err = pdfcpu.ParseImageWatermarkDetails(flag.Arg(0), flag.Arg(1), onTop, conf.Unit)
case "pdf":
wm, err = pdfcpu.ParsePDFWatermarkDetails(flag.Arg(0), flag.Arg(1), onTop, conf.Unit)
default:
err = errors.Errorf("unsupported wm type: %s\n", mode)
}
if err != nil {
fmt.Fprintf(os.Stderr, "%v\n", err)
os.Exit(1)
}
selectedPages, err := api.ParsePageSelection(selectedPages)
if err != nil {
fmt.Fprintf(os.Stderr, "problem with flag selectedPages: %v", err)
os.Exit(1)
}
wm.Update = true
inFile := flag.Arg(2)
if conf.CheckFileNameExt {
ensurePDFExtension(inFile)
}
outFile := ""
if len(flag.Args()) == 4 {
outFile = flag.Arg(3)
ensurePDFExtension(outFile)