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|
use crate::graph::GraphOptions;
use std::str::FromStr;
pub enum GraphType {
Star,
Ascii,
}
pub struct Opts {
pub width: Option<u64>,
pub height: Option<u64>,
pub graph_type: GraphType,
pub interpolate: bool,
pub axis: bool,
pub last_n: Option<u64>,
}
impl From<&Opts> for GraphOptions {
fn from(opts: &Opts) -> Self {
GraphOptions {
width: opts.width.unwrap_or_else(|| {
if let Ok((width, _)) = crate::term::get_terminal_size() {
// Here it would maybe be a good idea to keep the size of the graph if it is smaller than
// the specified value
width as u64
} else {
println!("Could not determine TTY columns, specify with -r");
std::process::exit(1);
}
}),
height: opts.height.unwrap_or_else(|| {
if let Ok((_, height)) = crate::term::get_terminal_size() {
// Here it would maybe be a good idea to keep the size of the graph if it is smaller than
// the specified value
height as u64 - 1
} else {
println!("Could not determine TTY rows, specify with -h");
std::process::exit(1);
}
}),
interpolate: opts.interpolate,
axis: opts.axis,
}
}
}
macro_rules! parseopts_panic {
($progname:expr) => {
println!(
"Usage: {} [-h|--height <height>] [-w|--width <width>] [-t <star|ascii>]",
$progname
);
std::process::exit(1);
};
}
pub fn parseopts() -> Opts {
let mut opts = Opts {
width: None,
height: None,
graph_type: GraphType::Star,
interpolate: false,
axis: false,
last_n: None,
};
let mut it = std::env::args();
let progname = it.next().expect("TG1");
while let Some(arg) = it.next() {
match arg.as_str() {
"--interpolate" => {
opts.interpolate = true;
}
"-t" => {
let Some(graph_type) = it.next() else {
println!("Missing value for {}", arg);
parseopts_panic!(progname);
};
match graph_type.as_str() {
"star" => {
opts.graph_type = GraphType::Star;
}
"ascii" => {
opts.graph_type = GraphType::Ascii;
}
t => {
println!(
"Unknown type \"{}\", valid options are \"star\", \"ascii_trailing\".",
t
);
parseopts_panic!(progname);
}
}
}
"-h" | "--height" => {
let Some(height) = it.next() else {
println!("Missing value for {}", arg);
parseopts_panic!(progname);
};
let Ok(height) = u64::from_str(&height) else {
println!("Cannot parse integer from \"{}\"", height);
parseopts_panic!(progname);
};
opts.height = Some(height);
}
"-l" | "--last-n" => {
let Some(last_n) = it.next() else {
println!("Missing value for {}", arg);
parseopts_panic!(progname);
};
let Ok(last_n) = u64::from_str(&last_n) else {
println!("Cannot parse integer from \"{}\"", last_n);
parseopts_panic!(progname);
};
opts.last_n = Some(last_n);
}
"-a" | "--axis" => {
opts.axis = true;
}
"-w" | "--width" => {
let Some(width) = it.next() else {
println!("Missing value for {}", arg);
parseopts_panic!(progname);
};
let Ok(width) = u64::from_str(&width) else {
println!("Cannot parse integer from \"{}\"", width);
parseopts_panic!(progname);
};
opts.width = Some(width);
}
opt => {
println!("Unknown option \"{}\"", opt);
parseopts_panic!(progname);
}
}
}
return opts;
}
|
