1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65

use crate::*;



/// Allows you to keep reading until a condition is valid
pub struct SimpleValidate<F: Fn(&str) -> Result<(), String>>(pub F);

impl<'a, F: Fn(&str) -> Result<(), String>> TryRead<'a> for SimpleValidate<F> {
	type Output = String;
	type Default = &'a str;
	fn try_read_line(&'a self, prompt: Option<String>, default: Option<Self::Default>) -> BoxResult<Self::Output> {
		let mut prompt = prompt.unwrap_or_default();
		if let Some(default) = default.as_ref() {
			prompt += &format!("(default: {default}) ");
		}
		loop {
			
			print!("{prompt}");
			let input = read_stdin()?;
			if input.is_empty() && let Some(default) = default {
				return Ok(default.to_string());
			}
			match (self.0)(&input) {
				Ok(_) => return Ok(input),
				Err(error_message) => {
					println!();
					println!("{error_message}")
				}
			}
			
		}
	}
}



/// Allows you to keep reading until a transform is valid
pub struct TransformValidate<F: Fn(String) -> Result<O, String>, O: Display>(pub F);

impl<'a, F: Fn(String) -> Result<O, String>, O: Display + 'a> TryRead<'a> for TransformValidate<F, O> {
	type Output = O;
	type Default = O;
	fn try_read_line(&'a self, prompt: Option<String>, default: Option<Self::Default>) -> BoxResult<Self::Output> {
		let mut prompt = prompt.unwrap_or_default();
		if let Some(default) = default.as_ref() {
			prompt += &format!("(default: {default}) ");
		}
		loop {
			
			print!("{prompt}");
			let input = read_stdin()?;
			if input.is_empty() && let Some(default) = default {
				return Ok(default);
			}
			match (self.0)(input) {
				Ok(output) => return Ok(output),
				Err(error_message) => {
					println!();
					println!("{error_message}")
				}
			}
			
		}
	}
}