use colored;
use colored::Colorize;
use config::{Config, Delimiter};
use unicode_width::UnicodeWidthStr;
use util;
use CliResult;
static USAGE: &str = "
Prints flattened records such that fields are labeled separated by a new line.
This mode is particularly useful for viewing one record at a time. Each
record is separated by a special '#' character (on a line by itself), which
can be changed with the --separator flag.
There is also a condensed view (-c or --condense) that will shorten the
contents of each field to provide a summary view.
Pipe into \"less -r\" if you need to page the result, and use \"-C, --force-colors\"
not to lose the colors:
$ xan flatten -C file.csv | less -r
Usage:
xan flatten [options] [<input>]
flatten options:
-c, --condense Don't wrap cell values on new lines but truncate them
with ellipsis instead.
-w, --wrap Wrap cell values all while minding the header's indent.
--cols <num> Width of the graph in terminal columns, i.e. characters.
Defaults to using all your terminal's width or 80 if
terminal's size cannot be found (i.e. when piping to file).
-R, --rainbow Alternating colors for cells, rather than color by value type.
-C, --force-colors Force colors even if output is not supposed to be able to
handle them.
Common options:
-h, --help Display this message
-n, --no-headers When set, the first row will not be interpreted
as headers. When set, the name of each field
will be its index.
-d, --delimiter <arg> The field delimiter for reading CSV data.
Must be a single character. [default: ,]
";
#[derive(Deserialize)]
struct Args {
arg_input: Option<String>,
flag_condense: bool,
flag_wrap: bool,
flag_cols: Option<usize>,
flag_rainbow: bool,
flag_force_colors: bool,
flag_no_headers: bool,
flag_delimiter: Option<Delimiter>,
}
pub fn run(argv: &[&str]) -> CliResult<()> {
let args: Args = util::get_args(USAGE, argv)?;
let rconfig = Config::new(&args.arg_input)
.delimiter(args.flag_delimiter)
.no_headers(args.flag_no_headers);
let mut rdr = rconfig.reader()?;
if args.flag_force_colors {
colored::control::set_override(true);
}
let cols = util::acquire_term_cols(&args.flag_cols);
let potential_headers = rdr.headers()?.clone();
let mut headers: Vec<String> = Vec::new();
for (i, header) in potential_headers.iter().enumerate() {
let header = match rconfig.no_headers {
true => i.to_string(),
false => header.to_string(),
};
headers.push(header);
}
let max_header_width = headers
.iter()
.map(|h| h.width())
.max()
.ok_or("file is empty")?;
if cols < max_header_width + 2 {
return fail!("not enough cols provided to safely print data!");
}
let mut record = csv::StringRecord::new();
let mut record_index: usize = 0;
let max_value_width = cols - max_header_width - 1;
while rdr.read_record(&mut record)? {
if record_index > 0 {
println!();
}
println!("{}", format!("Row n°{}", record_index).bold());
println!("{}", "─".repeat(cols).dimmed());
for (i, (header, cell)) in headers.iter().zip(record.iter()).enumerate() {
let cell = match cell.trim() {
"" => "<empty>",
_ => cell,
};
let cell_colorizer = if args.flag_rainbow {
util::colorizer_by_rainbow(i, cell)
} else {
util::colorizer_by_type(cell)
};
let cell = if args.flag_condense {
util::unicode_aware_rpad_with_ellipsis(cell, max_value_width, " ")
} else if args.flag_wrap {
util::unicode_aware_wrap(cell, max_value_width, max_header_width + 1)
} else {
cell.to_string()
};
let cell = util::colorize(&cell_colorizer, &cell);
println!(
"{}{}",
util::unicode_aware_rpad(header, max_header_width + 1, " "),
cell
);
}
record_index += 1;
}
Ok(())
}