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Adding drop function

This commit is contained in:
Matthew Sparks 2021-09-16 22:55:11 -04:00
parent dc242182f4
commit 069ee47364
3 changed files with 101 additions and 51 deletions
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13
dicebot/src/basic/dice.rs
View File

@ -13,21 +13,24 @@ pub struct Dice {
pub(crate) count: u32, pub(crate) count: u32,
pub(crate) sides: u32, pub(crate) sides: u32,
pub(crate) keep: u32, pub(crate) keep: u32,
pub(crate) drop: u32,
} }
impl fmt::Display for Dice { impl fmt::Display for Dice {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.keep == self. count { if self.keep != self.count {
write!(f, "{}d{}", self.count, self.sides)
} else {
write!(f, "{}d{}k{}", self.count, self.sides, self.keep) write!(f, "{}d{}k{}", self.count, self.sides, self.keep)
} else if self.drop != 0 {
write!(f, "{}d{}d{}", self.count, self.sides, self.drop)
} else {
write!(f, "{}d{}", self.count, self.sides)
} }
} }
} }
impl Dice { impl Dice {
pub fn new(count: u32, sides: u32, keep: u32) -> Dice { pub fn new(count: u32, sides: u32, keep: u32, drop: u32) -> Dice {
Dice { count, sides, keep } Dice { count, sides, keep, drop }
} }
} }

70
dicebot/src/basic/parser.rs
View File

@ -35,6 +35,7 @@ enum Sign {
fn parse_dice(input: &str) -> IResult<&str, Dice> { fn parse_dice(input: &str) -> IResult<&str, Dice> {
// parse main dice expression // parse main dice expression
let (mut input, (count, _, sides)) = tuple((digit1, tag("d"), digit1))(input)?; let (mut input, (count, _, sides)) = tuple((digit1, tag("d"), digit1))(input)?;
// check for keep expression (i.e. D&D 5E Advantage) // check for keep expression (i.e. D&D 5E Advantage)
let keep; let keep;
match tuple::<&str, _, (_, _), _>((tag("k"), digit1))(input) { match tuple::<&str, _, (_, _), _>((tag("k"), digit1))(input) {
@ -46,16 +47,36 @@ fn parse_dice(input: &str) -> IResult<&str, Dice> {
// otherwise absent and keep all dice // otherwise absent and keep all dice
Err(_) => keep = count, Err(_) => keep = count,
}; };
// check for drop expression (i.e. D&D 5E Disadvantage)
let drop;
match tuple::<&str, _, (_, _), _>((tag("d"), digit1))(input) {
// if ok, drop expression is present
Ok(r) => {
input = r.0;
drop = r.1.1;
}
// otherwise absent and keep all dice
Err(_) => drop = "0",
};
let count: u32 = count.parse().unwrap();
// don't allow keep greater than number of dice, and don't allow keep zero // don't allow keep greater than number of dice, and don't allow keep zero
let mut keep: u32 = keep.parse().unwrap(); let mut keep: u32 = keep.parse().unwrap();
let count: u32 = count.parse().unwrap();
if keep > count || keep == 0 { if keep > count || keep == 0 {
keep = count; keep = count;
} }
// don't allow drop greater than or equal to number of dice
let mut drop: u32 = drop.parse().unwrap();
if drop >= count {
drop = 0;
}
Ok(( Ok((
input, input,
Dice::new(count, sides.parse().unwrap(), keep), Dice::new(count, sides.parse().unwrap(), keep, drop),
)) ))
} }
@ -127,26 +148,29 @@ mod tests {
use super::*; use super::*;
#[test] #[test]
fn dice_test() { fn dice_test() {
assert_eq!(parse_dice("2d4"), Ok(("", Dice::new(2, 4, 2)))); assert_eq!(parse_dice("2d4"), Ok(("", Dice::new(2, 4, 2, 0))));
assert_eq!(parse_dice("20d40"), Ok(("", Dice::new(20, 40, 20)))); assert_eq!(parse_dice("20d40"), Ok(("", Dice::new(20, 40, 20, 0))));
assert_eq!(parse_dice("8d7"), Ok(("", Dice::new(8, 7, 8)))); assert_eq!(parse_dice("8d7"), Ok(("", Dice::new(8, 7, 8, 0))));
assert_eq!(parse_dice("2d20k1"), Ok(("", Dice::new(2, 20, 1)))); assert_eq!(parse_dice("2d20k1"), Ok(("", Dice::new(2, 20, 1, 0))));
assert_eq!(parse_dice("100d10k90"), Ok(("", Dice::new(100, 10, 90)))); assert_eq!(parse_dice("100d10k90"), Ok(("", Dice::new(100, 10, 90, 0))));
assert_eq!(parse_dice("11d10k10"), Ok(("", Dice::new(11, 10, 10)))); assert_eq!(parse_dice("11d10k10"), Ok(("", Dice::new(11, 10, 10, 0))));
assert_eq!(parse_dice("12d10k11"), Ok(("", Dice::new(12, 10, 11)))); assert_eq!(parse_dice("12d10k11"), Ok(("", Dice::new(12, 10, 11, 0))));
assert_eq!(parse_dice("12d10k13"), Ok(("", Dice::new(12, 10, 12)))); assert_eq!(parse_dice("12d10k13"), Ok(("", Dice::new(12, 10, 12, 0))));
assert_eq!(parse_dice("12d10k0"), Ok(("", Dice::new(12, 10, 12)))); assert_eq!(parse_dice("12d10k0"), Ok(("", Dice::new(12, 10, 12, 0))));
assert_eq!(parse_dice("20d40d5"), Ok(("", Dice::new(20, 40, 20, 5))));
assert_eq!(parse_dice("8d7d9"), Ok(("", Dice::new(8, 7, 8, 0))));
assert_eq!(parse_dice("8d7d8"), Ok(("", Dice::new(8, 7, 8, 0))));
} }
#[test] #[test]
fn element_test() { fn element_test() {
assert_eq!( assert_eq!(
parse_element(" \t\n\r\n 8d7 \n"), parse_element(" \t\n\r\n 8d7 \n"),
Ok((" \n", Element::Dice(Dice::new(8, 7, 8)))) Ok((" \n", Element::Dice(Dice::new(8, 7, 8, 0))))
); );
assert_eq!( assert_eq!(
parse_element(" \t\n\r\n 3d20k2 \n"), parse_element(" \t\n\r\n 3d20k2 \n"),
Ok((" \n", Element::Dice(Dice::new(3, 20, 2)))) Ok((" \n", Element::Dice(Dice::new(3, 20, 2, 0))))
); );
assert_eq!( assert_eq!(
parse_element(" \t\n\r\n 8 \n"), parse_element(" \t\n\r\n 8 \n"),
@ -168,21 +192,21 @@ mod tests {
parse_signed_element(" \t\n\r\n- 8d4 \n"), parse_signed_element(" \t\n\r\n- 8d4 \n"),
Ok(( Ok((
" \n", " \n",
SignedElement::Negative(Element::Dice(Dice::new(8, 4, 8))) SignedElement::Negative(Element::Dice(Dice::new(8, 4, 8, 0)))
)) ))
); );
assert_eq!( assert_eq!(
parse_signed_element(" \t\n\r\n- 8d4k4 \n"), parse_signed_element(" \t\n\r\n- 8d4k4 \n"),
Ok(( Ok((
" \n", " \n",
SignedElement::Negative(Element::Dice(Dice::new(8, 4, 4))) SignedElement::Negative(Element::Dice(Dice::new(8, 4, 4, 0)))
)) ))
); );
assert_eq!( assert_eq!(
parse_signed_element(" \t\n\r\n+ 8d4 \n"), parse_signed_element(" \t\n\r\n+ 8d4 \n"),
Ok(( Ok((
" \n", " \n",
SignedElement::Positive(Element::Dice(Dice::new(8, 4, 8))) SignedElement::Positive(Element::Dice(Dice::new(8, 4, 8, 0)))
)) ))
); );
} }
@ -194,7 +218,7 @@ mod tests {
Ok(( Ok((
"", "",
ElementExpression(vec![SignedElement::Positive(Element::Dice(Dice::new( ElementExpression(vec![SignedElement::Positive(Element::Dice(Dice::new(
8, 4, 8 8, 4, 8, 0
)))]) )))])
)) ))
); );
@ -203,7 +227,7 @@ mod tests {
Ok(( Ok((
"", "",
ElementExpression(vec![ ElementExpression(vec![
SignedElement::Positive(Element::Dice(Dice::new(2, 20, 1))), SignedElement::Positive(Element::Dice(Dice::new(2, 20, 1, 0))),
SignedElement::Positive(Element::Bonus(5)), SignedElement::Positive(Element::Bonus(5)),
]) ])
)) ))
@ -213,20 +237,20 @@ mod tests {
Ok(( Ok((
" \n ", " \n ",
ElementExpression(vec![SignedElement::Negative(Element::Dice(Dice::new( ElementExpression(vec![SignedElement::Negative(Element::Dice(Dice::new(
8, 4, 8 8, 4, 8, 0
)))]) )))])
)) ))
); );
assert_eq!( assert_eq!(
parse_element_expression("\t3d4 + 7 - 5 - 6d12 + 1d1 + 53 1d5 "), parse_element_expression("\t3d4k2 + 7 - 5 - 6d12d3 + 1d1 + 53 1d5 "),
Ok(( Ok((
" 1d5 ", " 1d5 ",
ElementExpression(vec![ ElementExpression(vec![
SignedElement::Positive(Element::Dice(Dice::new(3, 4, 3))), SignedElement::Positive(Element::Dice(Dice::new(3, 4, 2, 0))),
SignedElement::Positive(Element::Bonus(7)), SignedElement::Positive(Element::Bonus(7)),
SignedElement::Negative(Element::Bonus(5)), SignedElement::Negative(Element::Bonus(5)),
SignedElement::Negative(Element::Dice(Dice::new(6, 12, 6))), SignedElement::Negative(Element::Dice(Dice::new(6, 12, 6, 3))),
SignedElement::Positive(Element::Dice(Dice::new(1, 1, 1))), SignedElement::Positive(Element::Dice(Dice::new(1, 1, 1, 0))),
SignedElement::Positive(Element::Bonus(53)), SignedElement::Positive(Element::Bonus(53)),
]) ])
)) ))

69
dicebot/src/basic/roll.rs
View File

@ -19,8 +19,8 @@ pub trait Rolled {
} }
#[derive(Debug, PartialEq, Eq, Clone)] #[derive(Debug, PartialEq, Eq, Clone)]
// array of rolls in order, and how many dice to keep // array of rolls in order, how many dice to keep, and how many to drop
pub struct DiceRoll (pub Vec<u32>, usize); pub struct DiceRoll (pub Vec<u32>, usize, usize);
impl DiceRoll { impl DiceRoll {
pub fn rolls(&self) -> &[u32] { pub fn rolls(&self) -> &[u32] {
@ -31,9 +31,13 @@ impl DiceRoll {
self.1 self.1
} }
pub fn drop(&self) -> usize {
self.2
}
// only count kept dice in total // only count kept dice in total
pub fn total(&self) -> u32 { pub fn total(&self) -> u32 {
self.0[..self.1].iter().sum() self.0[self.2..self.1].iter().sum()
} }
} }
@ -48,14 +52,19 @@ impl fmt::Display for DiceRoll {
write!(f, "{}", self.rolled_value())?; write!(f, "{}", self.rolled_value())?;
let rolls = self.rolls(); let rolls = self.rolls();
let keep = self.keep(); let keep = self.keep();
let drop = self.drop();
let mut iter = rolls.iter().enumerate(); let mut iter = rolls.iter().enumerate();
if let Some(first) = iter.next() { if let Some(first) = iter.next() {
write!(f, " ({}", first.1)?; if drop != 0 {
write!(f, " ([{}]", first.1)?;
} else {
write!(f, " ({}", first.1)?;
}
for roll in iter { for roll in iter {
if roll.0 < keep { if roll.0 >= keep || roll.0 < drop {
write!(f, " + {}", roll.1)?;
} else {
write!(f, " + [{}]", roll.1)?; write!(f, " + [{}]", roll.1)?;
} else {
write!(f, " + {}", roll.1)?;
} }
} }
write!(f, ")")?; write!(f, ")")?;
@ -75,7 +84,7 @@ impl Roll for dice::Dice {
// sort rolls in descending order // sort rolls in descending order
rolls.sort_by(|a, b| b.cmp(a)); rolls.sort_by(|a, b| b.cmp(a));
DiceRoll(rolls,self.keep as usize) DiceRoll(rolls,self.keep as usize, self.drop as usize)
} }
} }
@ -211,22 +220,26 @@ mod tests {
use super::*; use super::*;
#[test] #[test]
fn dice_roll_display_test() { fn dice_roll_display_test() {
assert_eq!(DiceRoll(vec![1, 3, 4], 3).to_string(), "8 (1 + 3 + 4)"); assert_eq!(DiceRoll(vec![1, 3, 4], 3, 0).to_string(), "8 (1 + 3 + 4)");
assert_eq!(DiceRoll(vec![], 0).to_string(), "0"); assert_eq!(DiceRoll(vec![], 0, 0).to_string(), "0");
assert_eq!( assert_eq!(
DiceRoll(vec![4, 7, 2, 10], 4).to_string(), DiceRoll(vec![4, 7, 2, 10], 4, 0).to_string(),
"23 (4 + 7 + 2 + 10)" "23 (4 + 7 + 2 + 10)"
); );
assert_eq!( assert_eq!(
DiceRoll(vec![20, 13, 11, 10], 3).to_string(), DiceRoll(vec![20, 13, 11, 10], 3, 0).to_string(),
"44 (20 + 13 + 11 + [10])" "44 (20 + 13 + 11 + [10])"
); );
assert_eq!(
DiceRoll(vec![20, 13, 11, 10], 4, 1).to_string(),
"34 ([20] + 13 + 11 + 10)"
);
} }
#[test] #[test]
fn element_roll_display_test() { fn element_roll_display_test() {
assert_eq!( assert_eq!(
ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3)).to_string(), ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3, 0)).to_string(),
"8 (1 + 3 + 4)" "8 (1 + 3 + 4)"
); );
assert_eq!(ElementRoll::Bonus(7).to_string(), "7"); assert_eq!(ElementRoll::Bonus(7).to_string(), "7");
@ -235,11 +248,11 @@ mod tests {
#[test] #[test]
fn signed_element_roll_display_test() { fn signed_element_roll_display_test() {
assert_eq!( assert_eq!(
SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3))).to_string(), SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3, 0))).to_string(),
"8 (1 + 3 + 4)" "8 (1 + 3 + 4)"
); );
assert_eq!( assert_eq!(
SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3))).to_string(), SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3, 0))).to_string(),
"-8 (1 + 3 + 4)" "-8 (1 + 3 + 4)"
); );
assert_eq!( assert_eq!(
@ -256,14 +269,14 @@ mod tests {
fn element_expression_roll_display_test() { fn element_expression_roll_display_test() {
assert_eq!( assert_eq!(
ElementExpressionRoll(vec![SignedElementRoll::Positive(ElementRoll::Dice( ElementExpressionRoll(vec![SignedElementRoll::Positive(ElementRoll::Dice(
DiceRoll(vec![1, 3, 4], 3) DiceRoll(vec![1, 3, 4], 3, 0)
)),]) )),])
.to_string(), .to_string(),
"8 (1 + 3 + 4)" "8 (1 + 3 + 4)"
); );
assert_eq!( assert_eq!(
ElementExpressionRoll(vec![SignedElementRoll::Negative(ElementRoll::Dice( ElementExpressionRoll(vec![SignedElementRoll::Negative(ElementRoll::Dice(
DiceRoll(vec![1, 3, 4], 3) DiceRoll(vec![1, 3, 4], 3, 0)
)),]) )),])
.to_string(), .to_string(),
"-8 (1 + 3 + 4)" "-8 (1 + 3 + 4)"
@ -280,8 +293,8 @@ mod tests {
); );
assert_eq!( assert_eq!(
ElementExpressionRoll(vec![ ElementExpressionRoll(vec![
SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3))), SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3, 0))),
SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![1, 2], 2))), SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![1, 2], 2, 0))),
SignedElementRoll::Positive(ElementRoll::Bonus(4)), SignedElementRoll::Positive(ElementRoll::Bonus(4)),
SignedElementRoll::Negative(ElementRoll::Bonus(7)), SignedElementRoll::Negative(ElementRoll::Bonus(7)),
]) ])
@ -290,8 +303,8 @@ mod tests {
); );
assert_eq!( assert_eq!(
ElementExpressionRoll(vec![ ElementExpressionRoll(vec![
SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3))), SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![1, 3, 4], 3, 0))),
SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![1, 2], 2))), SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![1, 2], 2, 0))),
SignedElementRoll::Negative(ElementRoll::Bonus(4)), SignedElementRoll::Negative(ElementRoll::Bonus(4)),
SignedElementRoll::Positive(ElementRoll::Bonus(7)), SignedElementRoll::Positive(ElementRoll::Bonus(7)),
]) ])
@ -300,13 +313,23 @@ mod tests {
); );
assert_eq!( assert_eq!(
ElementExpressionRoll(vec![ ElementExpressionRoll(vec![
SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![4, 3, 1], 3))), SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![4, 3, 1], 3, 0))),
SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![12, 2], 1))), SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![12, 2], 1, 0))),
SignedElementRoll::Negative(ElementRoll::Bonus(4)), SignedElementRoll::Negative(ElementRoll::Bonus(4)),
SignedElementRoll::Positive(ElementRoll::Bonus(7)), SignedElementRoll::Positive(ElementRoll::Bonus(7)),
]) ])
.to_string(), .to_string(),
"7 (-8 (4 + 3 + 1) + 12 (12 + [2]) - 4 + 7)" "7 (-8 (4 + 3 + 1) + 12 (12 + [2]) - 4 + 7)"
); );
assert_eq!(
ElementExpressionRoll(vec![
SignedElementRoll::Negative(ElementRoll::Dice(DiceRoll(vec![4, 3, 1], 3, 1))),
SignedElementRoll::Positive(ElementRoll::Dice(DiceRoll(vec![12, 2], 2, 0))),
SignedElementRoll::Negative(ElementRoll::Bonus(4)),
SignedElementRoll::Positive(ElementRoll::Bonus(7)),
])
.to_string(),
"13 (-4 ([4] + 3 + 1) + 14 (12 + 2) - 4 + 7)"
);
} }
} }