added convert_to_pdf function

NAMESPACE

@@ -3,6 +3,7 @@
 S3method(print,docx)
 export("%>%")
 export(assign_colnames)
+export(convert_pptx_to_pdf)
 export(docx_cmnt_count)
 export(docx_describe_cmnts)
 export(docx_describe_tbls)

R/convert_pptx_to_pdf.R

@@ -0,0 +1,42 @@
+#' Convert a PowerPoint Document to a PDF
+#'
+#' @md
+#' @param path path to the PowerPoint document
+#' @param pdf_file output PDF file name.  By default, creates . This functionality requires the use of
+#'        LibreOffice and the `soffice` binary it contains.  See
+#'        [set_libreoffice_path] for more information.  Note,
+#' @export
+#' @examples
+#' \dontrun{
+#' path = system.file("examples/ex.pptx", package="docxtractr")
+#' pdf <- convert_pptx_to_pdf(path, pdf_file = tempfile(fileext = ".pdf"))
+#' }
+convert_pptx_to_pdf <- function(path, pdf_file = sub("[.]pptx", ".pdf", path)) {
+  stopifnot(is_pptx(path))
+
+  lo_path <- getOption("path_to_libreoffice")
+  if (is.null(lo_path)) {
+    lo_path <- lo_find()
+  }
+  if (is.null(lo_path)) {
+    stop(lo_path_missing, call. = FALSE)
+  }
+
+  # making temporary file because by default soffice
+  # will make sub("[.]pptx", ".pdf", path) output
+  # and don't want to do that in case pdf_file in other location
+  cp_path = tempfile(fileext = ".pptx")
+  cp_pdf = sub("[.]pptx", ".pdf", cp_path)
+  file.copy(path, cp_path)
+
+  if (Sys.info()["sysname"] == "Windows") {
+    convert_win(lo_path, dirname(cp_path), cp_path, convert_to = "pdf")
+  } else {
+    convert_osx(lo_path, dirname(cp_path), cp_path, convert_to = "pdf")
+  }
+  if (!file.exists(cp_pdf)) {
+    stop("Conversion from PPTX to PDF did not succeed")
+  }
+  file.copy(cp_pdf, pdf_file)
+  return(pdf_file)
+}

R/utils.r

@@ -33,6 +33,8 @@ is_url <- function(path) { grepl("^(http|ftp)s?://", path) }
 
 is_docx <- function(path) { tolower(tools::file_ext(path)) == "docx" }
 
+is_pptx <- function(path) { tolower(tools::file_ext(path)) == "pptx" }
+
 is_doc <- function(path) { tolower(tools::file_ext(path)) == "doc" }
 
 # Copy a file to a new location, throw an error if the copy fails.
@@ -56,18 +58,22 @@ convert_doc_to_docx <- function(docx_dir, doc_file) {
 }
 
 # .docx to .doc convertion for Windows
-convert_win <- function(lo_path, docx_dir, doc_file) {
-  cmd <- sprintf('"%s" -convert-to docx:"MS Word 2007 XML" -headless -outdir "%s" "%s"',
+convert_win <- function(lo_path, docx_dir, doc_file,
+                        convert_to = 'docx:"MS Word 2007 XML"') {
+  cmd <- sprintf('"%s" --convert-to %s -headless -outdir "%s" "%s"',
                  lo_path,
+                 convert_to,
                  docx_dir,
                  doc_file)
   system(cmd, show.output.on.console = FALSE)
 }
 
 # .docx to .doc convertion for OSX
-convert_osx <- function(lo_path, docx_dir, doc_file) {
-  cmd <- sprintf('"%s" --convert-to docx:"MS Word 2007 XML" --headless --outdir "%s" "%s"',
+convert_osx <- function(lo_path, docx_dir, doc_file,
+                        convert_to = 'docx:"MS Word 2007 XML"') {
+  cmd <- sprintf('"%s" --convert-to %s --headless --outdir "%s" "%s"',
                  lo_path,
+                 convert_to,
                  docx_dir,
                  doc_file)
   res <- system(cmd, intern = TRUE)

man/convert_pptx_to_pdf.Rd

@@ -0,0 +1,24 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/convert_pptx_to_pdf.R
+\name{convert_pptx_to_pdf}
+\alias{convert_pptx_to_pdf}
+\title{Convert a PowerPoint Document to a PDF}
+\usage{
+convert_pptx_to_pdf(path, pdf_file = sub("[.]pptx", ".pdf", path))
+}
+\arguments{
+\item{path}{path to the PowerPoint document}
+
+\item{pdf_file}{output PDF file name.  By default, creates . This functionality requires the use of
+LibreOffice and the \code{soffice} binary it contains.  See
+\link{set_libreoffice_path} for more information.  Note,}
+}
+\description{
+Convert a PowerPoint Document to a PDF
+}
+\examples{
+\dontrun{
+path = system.file("examples/ex.pptx", package="docxtractr")
+pdf <- convert_pptx_to_pdf(path, pdf_file = tempfile(fileext = ".pdf"))
+}
+}