#' save_ggplot
#'
#' @description Save ggplot
#'
#' @param plot Plot to save.
#' @param filename File name to create on disk. The device (e.g. jpeg) must be specified as file extension.
#' @param path Path to save plot to (combined with filename).
#' @param overwrite If true, existing file is overwritten.
#' @param verbose If true, messages are printed to the console.
#' @param ... Options passed to ggsave.
#'
#' @details
#' This function checks if the plot aready exists before saving it. If the file aready
#' exists and \code{overwrite = FALSE} (default), the file is not saved. The filename and path
#' is combined using \code{file.path()}. See \code{?ggplot2::ggsave()} for more information.
#'
#' It is possible to set \code{path = ""} and use the entire path including the file
#' name as \code{filename} argument.
#'
#' @seealso
#' \code{\link{ggsave}}
#'
#' @examples
#' \dontrun{
#' x <- runif(n = 100)
#' y <- runif(n = 100)
#' result_plot <- ggplot2::ggplot() + ggplot2::geom_point(ggplot2::aes(x = x, y = y))
#' save_ggplot(result_plot, filename = "result_ggpplot.jpeg")
#' }
#'
#' @export
save_ggplot <- function(plot, filename = NULL, path = NULL,
overwrite = FALSE, verbose = TRUE, ...) {
if (is.null(path)) {path <- getwd()}
if (is.null(filename)) {filename <- 'R_plot.jpeg'}
complete_file <- file.path(path, filename)
if (substr(x = complete_file, start = 1, stop = 1) == "/") {
complete_file <- sub(pattern = "/", replacement = "", x = complete_file)
}
message("> Trying to save ggplot: ", complete_file, appendLF = TRUE)
if (file.exists(complete_file)) {
if (overwrite == TRUE) {
ggplot2::ggsave(plot = plot, filename = filename, path = path, ...)
if (verbose) message("> Existing ggplot overwriten", appendLF = TRUE)
}
else {
if (verbose) warning("Existing ggplot not overwriten", call. = FALSE)
}
}
else{
ggplot2::ggsave(plot = plot, filename = filename, path = path, ...)
if (verbose) message("> New ggplot written", appendLF = TRUE)
}
}
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