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
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134

use super::context::*;
use super::value::*;
use super::value_raw::*;
use num_bigint::BigUint;
use std::fmt;

pub trait Checkable<V> {
	fn check(&self, value: V) -> bool;
}

impl Checkable<&[u8]> for BytesValue {
	fn check(&self, value: &[u8]) -> bool {
		self.value.as_slice() == value
	}
}

impl Checkable<&BigUint> for BigUintValue {
	fn check(&self, value: &BigUint) -> bool {
		&self.value == value
	}
}

impl Checkable<u64> for U64Value {
	fn check(&self, value: u64) -> bool {
		self.value == value
	}
}

#[derive(Debug)]
pub enum CheckValue<T> {
	DefaultStar,
	Star,
	Equal(T),
}

impl<T: InterpretableFrom<ValueSubTree>> CheckValue<T> {
	pub fn is_star(&self) -> bool {
		matches!(self, CheckValue::Star | CheckValue::DefaultStar)
	}

	pub fn is_default_star(&self) -> bool {
		matches!(self, CheckValue::DefaultStar)
	}
}

impl<T: InterpretableFrom<ValueSubTree>> Default for CheckValue<T> {
	fn default() -> Self {
		CheckValue::DefaultStar
	}
}

impl<T: InterpretableFrom<ValueSubTree>> InterpretableFrom<ValueSubTree> for CheckValue<T> {
	fn interpret_from(from: ValueSubTree, context: &InterpreterContext) -> Self {
		if let ValueSubTree::Str(s) = &from {
			if s.is_empty() {
				return CheckValue::DefaultStar;
			} else if s == "*" {
				return CheckValue::Star;
			}
		}

		CheckValue::Equal(T::interpret_from(from, context))
	}
}

impl<T: fmt::Display> fmt::Display for CheckValue<T> {
	fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
		match self {
			CheckValue::Star | CheckValue::DefaultStar => write!(f, "*"),
			CheckValue::Equal(eq_value) => eq_value.fmt(f),
		}
	}
}

impl<V, T> Checkable<V> for CheckValue<T>
where
	T: Checkable<V>,
{
	fn check(&self, value: V) -> bool {
		match self {
			CheckValue::DefaultStar | CheckValue::Star => true,
			CheckValue::Equal(eq) => eq.check(value),
		}
	}
}

impl Checkable<&[Vec<u8>]> for Vec<CheckValue<BytesValue>> {
	fn check(&self, values: &[Vec<u8>]) -> bool {
		if self.len() != values.len() {
			return false;
		}
		for (i, cv) in self.iter().enumerate() {
			if !cv.check(values[i].as_slice()) {
				return false;
			}
		}
		true
	}
}

#[cfg(test)]
mod tests {
	use super::*;

	#[test]
	fn check_bytes() {
		let bv = BytesValue {
			value: b"abc".to_vec(),
			original: ValueSubTree::Str("abc".to_string()),
		};
		assert!(bv.check(&b"abc"[..]));

		let cb_eq = CheckValue::Equal(bv);
		assert!(cb_eq.check(&b"abc"[..]));

		let cb_star: CheckValue<BytesValue> = CheckValue::Star;
		assert!(cb_star.check(&b"anything_really"[..]));
	}

	#[test]
	fn check_u64() {
		let u64v = U64Value {
			value: 123,
			original: ValueSubTree::Str("123".to_string()),
		};
		assert!(u64v.check(123u64));

		let cb_eq = CheckValue::Equal(u64v);
		assert!(cb_eq.check(123u64));

		let cb_star: CheckValue<U64Value> = CheckValue::Star;
		assert!(cb_star.check(1234567890));
	}
}