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use std::io::{stdin, stdout, Write};
use std::ops::Add;
use std::process::Command;
use colored::*;
use crate::{Cause, CausedResult, Error};
static STEP_PREFIX_MARKER: &str = "+";
static ERROR_PREFIX_MARKER: &str = "!";
static DEBUG_PREFIX_MARKER: &str = "-";
static QUESTION_PREFIX_MARKER: &str = "?";
static NO_PREFIX: &str = "";
fn make_padding(length: i32) -> String {
let mut pad = String::new();
if length > 0 {
pad = String::new();
for _ in 0..length {
pad = pad.add("| ");
}
}
pad
}
pub struct OutputManager {
pub verbose: bool,
padding: i32,
}
impl OutputManager {
pub fn new(verbose: bool) -> OutputManager {
OutputManager {
verbose,
padding: 0,
}
}
pub fn push(&self) -> OutputManager {
OutputManager {
verbose: self.verbose,
padding: self.padding + 1,
}
}
pub fn with_padding(&self, padding: i32) -> OutputManager {
OutputManager {
verbose: self.verbose,
padding,
}
}
fn print(&self, msg: ColoredString, prefix_marker: &str, verbose_only: bool) {
if !self.verbose && verbose_only {
return;
}
let pad = make_padding(self.padding);
println!("{}{} {}", pad, prefix_marker, msg);
}
fn print_sameline(&self, msg: ColoredString, prefix_marker: &str, verbose_only: bool) {
if !self.verbose && verbose_only {
return;
}
let pad = make_padding(self.padding);
print!("{}{} {}", pad, prefix_marker, msg);
}
pub fn step(&self, msg: &str) {
self.print(msg.yellow(), STEP_PREFIX_MARKER, false);
}
pub fn progress(&self, msg: &str) {
self.print(ColoredString::from(msg), NO_PREFIX, false);
}
pub fn success(&self, msg: &str) {
self.print(msg.green(), STEP_PREFIX_MARKER, false);
}
pub fn debug(&self, msg: &str) {
self.print(msg.blue(), DEBUG_PREFIX_MARKER, true);
}
pub fn error(&self, msg: &str) {
self.print(msg.red(), ERROR_PREFIX_MARKER, false);
}
pub fn prompt(&self, msg: &str) -> CausedResult<String> {
self.print_sameline(msg.blue(), QUESTION_PREFIX_MARKER, false);
let mut user_input = String::new();
stdout().flush()?;
stdin().read_line(&mut user_input)?;
Ok(String::from(user_input.trim()))
}
pub fn prompt_yn(&self, msg: &str, default: bool) -> CausedResult<bool> {
if default {
self.print_sameline(
format!("{} [Y/n] - ", msg).blue(),
QUESTION_PREFIX_MARKER,
false,
);
} else {
self.print_sameline(
format!("{} [y/N] - ", msg).blue(),
QUESTION_PREFIX_MARKER,
false,
);
}
let mut user_input = String::new();
stdout().flush()?;
stdin().read_line(&mut user_input)?;
let user_pick = user_input.trim().to_ascii_lowercase();
if default {
Ok(&user_pick != "n")
} else {
Ok(&user_pick == "y")
}
}
pub fn clear(&self) -> CausedResult<()> {
if cfg!(unix) {
if !Command::new("clear").status()?.success() {
Err(Error::new(
Cause::IOError,
"Unknown error while clearing terminal",
))
} else {
Ok(())
}
} else if cfg!(windows) {
if !Command::new("cls").status()?.success() {
Err(Error::new(
Cause::IOError,
"Unknown error while clearing terminal",
))
} else {
Ok(())
}
} else {
Err(Error::new(
Cause::GeneralError(String::from("Unsupported")),
"Unsupported",
))
}
}
}