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#' @title Read a '.json' File in the '.pbix' Collection of Files
#' @description The byte sequence of a '.json' file within a '.pbix' is
#' retrieved, cleaned by removing ASCII control characters and written to
#' a temporary file. An attempt is made to read the temporary file as '.json'.
#' If reading the temporary file as '.json' fails, a second attempt is made.
#' For the second attempt, specific data within the '.json' file is included
#' and a temporary file is written. The temporary file is read as '.json'.
#' @author Don Diproto
#' @param input_file_pbix Path of the input '.pbix'.
#' @param input_file Path of '.json' file in collection of files.
#' @param gsub1 Text to select for replacement (i.e. text to exclude).
#' @param gsub2 Text to replace selected text (i.e. text to include).
#' @return Layout as '.json'.
#' @import jsonlite
#' @importFrom textclean replace_non_ascii
#' @importFrom stringr str_replace
#' @export
#' @seealso Uses: \code{\link{f_get_pbix_fir}}.
#' @examples
#' \dontrun{
#' # Get dummy data ------------------------------------------------------------
#' # Create a temporary directory
#' temp_dir <- file.path(tempdir(),"functionTest")
#' if(!dir.exists(temp_dir)) {
#' dir.create(temp_dir)
#' }
#' sample_file_name <- "OR_sample_func.pbix"
#' pathFileSample <- file.path(temp_dir, sample_file_name)
#'
#' # See if dummy data already exists in temporary directory
#' parent_temp_dir <- dirname(temp_dir)
#' existing_file <- list.files(parent_temp_dir,
#' pattern = sample_file_name, recursive = TRUE, full.names = TRUE)
#'
#' # Download the sample .pbix if it doesn't exist
#' if (length(existing_file) == 0) {
#' url_pt1 <- "https://github.com/KoenVerbeeck/PowerBI-Course/blob/"
#' url_pt2 <- "master/pbix/TopMovies.pbix?raw=true"
#' url <- paste0(url_pt1, url_pt2)
#' req <- download.file(url, destfile = pathFileSample, mode = "wb")
#' } else {
#' pathFileSample <- existing_file[1]
#' }
#' # Do stuff ------------------------------------------------------------------
#'
#' # Run the function
#' gsub__1 <- paste0(".*sections")
#' gsub__2 <- "\{\"id\":0,\"sections"
#' test <- f_read_any_json(pathFileSample, "Report/Layout",
#' gsub__1, gsub__2)
#' }
f_read_any_json <- function(input_file_pbix, input_file, gsub1, gsub2) {
buffer <- f_get_pbix_fir(input_file_pbix, input_file)
# Remove any non-encoded characters ------------------------------------------
# Convert raw to character representation
buffer_char <- paste0("", buffer)
# Create ASCII control characters for removal
ascii_control_bytes <- (c())
vec_ascii <- 1:33
for (ascii_control_bytes_i in seq_along(vec_ascii)) {
o1 <- as.character(as.hexmode(ascii_control_bytes_i - 1))
o2 <- ifelse(nchar(o1) == 1, paste0(0, o1), o1)
ascii_control_bytes[ascii_control_bytes_i] <- o2
}
control_byte_index <- which(buffer_char %in% ascii_control_bytes)
if (length(control_byte_index) > 0) {
clean_buffer_char <- buffer_char[-control_byte_index]
} else {
clean_buffer_char <- buffer_char
}
# Change the class back to raw
clean_buffer <- as.raw(as.hexmode(clean_buffer_char))
# Convert hex to characters
clean_buffer_char <- rawToChar(clean_buffer, multiple = TRUE)
# Make one long string remove non-ASCII characters
clean_buffer_char_one <- textclean::replace_non_ascii(
paste0(clean_buffer_char, collapse = "")
)
# Read the json --------------------------------------------------------------
json_reader <- function(clean_buffer_char_one) {
tryCatch({
# Read without data exclusion
temp_file <- tempfile()
temp_file_new <- paste0(temp_file, ".json")
zz <- file(temp_file, "wb")
writeChar(clean_buffer_char_one, zz, eos = NULL)
close(zz)
file.rename(temp_file, temp_file_new)
# Read
get_data <- jsonlite::fromJSON(temp_file_new)
return(get_data)
},
error = function(e) {
# Read with data exclusion
e_msg <- paste0(
"An error occured reading without data exclusion. ",
"The file was read with data exclusion: ",
"gsub(\"", gsub1, "\"",
",\"", gsub2, "\", ...)"
)
message(e_msg)
cb1 <- gsub(
pattern = gsub1,
replacement = gsub2,
x = clean_buffer_char_one
)
temp_file <- tempfile()
temp_file_new <- paste0(temp_file, ".json")
zz <- file(temp_file, "wb")
writeChar(cb1, zz, eos = NULL)
close(zz)
file.rename(temp_file, temp_file_new)
# Read
get_data <- jsonlite::fromJSON(temp_file_new)
return(get_data)
}
)
}
read_json <- json_reader(clean_buffer_char_one)
return(read_json)
}
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