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refactor into modules

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This commit is contained in:
kageru 2023-01-26 23:07:16 +01:00
parent d906f18845
commit f3eeb570ce
Signed by: kageru
GPG Key ID: 8282A2BEA4ADA3D2
6 changed files with 452 additions and 366 deletions
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77
Cargo.lock generated
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@ -2,6 +2,22 @@
# It is not intended for manual editing.
version = 3
[[package]]
name = "aro"
version = "0.1.0"
dependencies = [
"nom",
"serde",
"serde_json",
"test-case",
]
[[package]]
name = "cfg-if"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]]
name = "itoa"
version = "1.0.4"
@ -30,6 +46,30 @@ dependencies = [
"minimal-lexical",
]
[[package]]
name = "proc-macro-error"
version = "1.0.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
dependencies = [
"proc-macro-error-attr",
"proc-macro2",
"quote",
"syn",
"version_check",
]
[[package]]
name = "proc-macro-error-attr"
version = "1.0.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
dependencies = [
"proc-macro2",
"quote",
"version_check",
]
[[package]]
name = "proc-macro2"
version = "1.0.47"
@ -54,15 +94,6 @@ version = "1.0.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
[[package]]
name = "scryfall-ygo"
version = "0.1.0"
dependencies = [
"nom",
"serde",
"serde_json",
]
[[package]]
name = "serde"
version = "1.0.147"
@ -105,8 +136,36 @@ dependencies = [
"unicode-ident",
]
[[package]]
name = "test-case"
version = "2.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "21d6cf5a7dffb3f9dceec8e6b8ca528d9bd71d36c9f074defb548ce161f598c0"
dependencies = [
"test-case-macros",
]
[[package]]
name = "test-case-macros"
version = "2.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e45b7bf6e19353ddd832745c8fcf77a17a93171df7151187f26623f2b75b5b26"
dependencies = [
"cfg-if",
"proc-macro-error",
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "unicode-ident"
version = "1.0.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
[[package]]
name = "version_check"
version = "0.9.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"

1
Cargo.toml
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@ -7,3 +7,4 @@ edition = "2021"
serde_json = "1.0"
serde = { version = "1.0", features = ["derive"] }
nom = "7.1.3"
test-case = "2.2.2"

119
src/data.rs Normal file
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@ -0,0 +1,119 @@
use serde::Deserialize;
use std::fmt::{self, Display};
#[derive(Debug, Deserialize, PartialEq, Eq, Clone)]
pub struct CardInfo {
pub data: Vec<Card>,
}
#[derive(Debug, Deserialize, PartialEq, Eq, Clone, Default)]
pub struct Card {
pub id: usize,
#[serde(rename = "type")]
pub card_type: String,
pub name: String,
#[serde(rename = "desc")]
pub text: String,
// Will also be None for ?
pub atk: Option<i32>,
pub def: Option<i32>,
pub attribute: Option<String>,
#[serde(rename = "race")]
pub r#type: String,
// also includes rank
pub level: Option<i32>,
#[serde(rename = "linkval")]
pub link_rating: Option<i32>,
#[serde(rename = "linkmarkers")]
pub link_arrows: Option<Vec<String>>,
}
impl Display for Card {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{} (", &self.name)?;
if let Some(level) = self.level {
write!(f, "Level {level} ")?;
} else if let Some(lr) = self.link_rating {
write!(f, "Link {lr} ")?;
}
if let Some(attr) = &self.attribute {
write!(f, "{attr}/")?;
}
write!(f, "{} {})", self.r#type, self.card_type)?;
if self.card_type.contains(&String::from("Monster")) {
match (self.atk, self.def) {
(Some(atk), Some(def)) => write!(f, " {atk} ATK / {def} DEF")?,
(Some(atk), None) if self.link_rating.is_some() => write!(f, "{atk} ATK")?,
(None, Some(def)) => write!(f, " ? ATK / {def} DEF")?,
(Some(atk), None) => write!(f, " {atk} ATK / ? DEF")?,
(None, None) => write!(f, " ? ATK / ? DEF")?,
}
}
Ok(())
}
}
#[cfg(test)]
pub mod tests {
use super::*;
pub const RAW_SPELL: &str = r#"
{
"id": 41142615,
"name": "The Cheerful Coffin",
"type": "Spell Card",
"desc": "Discard up to 3 Monster Cards from your hand to the Graveyard.",
"race": "Normal"
}"#;
pub const RAW_MONSTER: &str = r#"
{
"id": 2326738,
"name": "Des Lacooda",
"type": "Effect Monster",
"desc": "Once per turn: You can change this card to face-down Defense Position. When this card is Flip Summoned: Draw 1 card.",
"atk": 500,
"def": 600,
"level": 3,
"race": "Zombie",
"attribute": "EARTH"
}"#;
#[test]
fn test_spell() {
let coffin: Card = serde_json::from_str(RAW_SPELL).unwrap();
assert_eq!(
coffin,
Card {
id: 41142615,
card_type: "Spell Card".to_owned(),
name: "The Cheerful Coffin".to_owned(),
text: "Discard up to 3 Monster Cards from your hand to the Graveyard.".to_owned(),
r#type: "Normal".to_owned(),
..Default::default()
}
)
}
#[test]
fn test_monster() {
let munch: Card = serde_json::from_str(RAW_MONSTER).unwrap();
assert_eq!(
munch,
Card {
id: 2326738,
card_type: "Effect Monster".to_owned(),
name: "Des Lacooda".to_owned(),
text:
"Once per turn: You can change this card to face-down Defense Position. When this card is Flip Summoned: Draw 1 card."
.to_owned(),
atk: Some(500),
def: Some(600),
level: Some(3),
r#type: "Zombie".to_owned(),
attribute: Some("EARTH".to_owned()),
..Default::default()
},
)
}
}

87
src/filter.rs Normal file
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@ -0,0 +1,87 @@
use crate::{
data::Card,
parser::{Field, Operator, Value, OPERATOR_CHARS},
};
/// A struct derived from `Card` that has all fields lowercased for easier search
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct SearchCard {
pub id: usize,
card_type: String,
name: String,
text: String,
atk: Option<i32>,
def: Option<i32>,
attribute: Option<String>,
r#type: String,
// also includes rank
level: Option<i32>,
link_rating: Option<i32>,
link_arrows: Option<Vec<String>>,
}
impl From<&Card> for SearchCard {
fn from(card: &Card) -> Self {
Self {
id: card.id,
card_type: card.card_type.to_lowercase(),
name: card.name.to_lowercase(),
text: card.text.to_lowercase(),
atk: card.atk,
def: card.def,
attribute: card.attribute.as_ref().map(|s| s.to_lowercase()),
r#type: card.r#type.to_lowercase(),
level: card.level,
link_rating: card.link_rating,
link_arrows: card.link_arrows.as_ref().map(|arrows| arrows.iter().map(|a| a.to_lowercase()).collect()),
}
}
}
pub type CardFilter = Box<dyn Fn(&SearchCard) -> bool>;
pub type RawCardFilter = (Field, Operator, Value);
pub fn fallback_filter(query: &str) -> Result<RawCardFilter, String> {
if query.contains(&OPERATOR_CHARS[..]) {
return Err(format!("Invalid query: {query}"));
}
#[cfg(debug_assertions)]
println!("Trying to match {query} as card name");
let q = query.to_lowercase();
Ok((Field::Name, Operator::Equals, Value::String(q)))
}
pub fn build_filter(query: RawCardFilter) -> Result<CardFilter, String> {
dbg!(&query);
Ok(match query {
(Field::Atk, op, Value::Numerical(n)) => Box::new(move |card| op.filter_number(card.atk, n)),
(Field::Def, op, Value::Numerical(n)) => Box::new(move |card| op.filter_number(card.def, n)),
// ? ATK/DEF is modeled as None in the source json. At least for some monsters.
// Let’s at least find those.
(Field::Atk, _, Value::String(s)) if s == "?" => Box::new(move |card| card.atk.is_none() && card.card_type.contains("monster")),
(Field::Def, _, Value::String(s)) if s == "?" => {
Box::new(move |card| card.def.is_none() && card.link_rating.is_none() && card.card_type.contains("monster"))
}
(Field::Level, op, Value::Numerical(n)) => Box::new(move |card| op.filter_number(card.level, n)),
(Field::Type, Operator::Equals, Value::String(s)) => Box::new(move |card| card.r#type == s),
(Field::Class, Operator::Equals, Value::String(s)) => Box::new(move |card| card.card_type.contains(&s)),
(Field::Text, Operator::Equals, Value::String(s)) => Box::new(move |card| card.text.contains(&s)),
(Field::Name, Operator::Equals, Value::String(s)) => Box::new(move |card| card.name.contains(&s)),
q => Err(format!("unknown query: {q:?}"))?,
})
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{data::tests::RAW_MONSTER, parser::parse_filters};
#[test]
fn level_filter_test() {
let lacooda = SearchCard::from(&serde_json::from_str::<Card>(RAW_MONSTER).unwrap());
let filter_level_3 = parse_filters("l=3").unwrap();
assert!(filter_level_3[0](&lacooda));
let filter_level_5 = parse_filters("l=5").unwrap();
assert!(!filter_level_5[0](&lacooda));
}
}

368
src/main.rs
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@ -1,367 +1,21 @@
#![feature(option_result_contains)]
use nom::{
branch::alt,
bytes::complete::{take_until1, take_while, take_while_m_n},
character::complete::{alphanumeric1, multispace0},
combinator::{complete, map_res, rest},
multi::many1,
sequence::{preceded, tuple},
IResult,
};
use serde::Deserialize;
use std::{
collections::HashMap,
fmt::{self, Display},
str::FromStr,
};
use std::collections::HashMap;
type CardFilter = Box<dyn Fn(&SearchCard) -> bool>;
type RawCardFilter = (Field, Operator, Value);
use data::CardInfo;
use filter::SearchCard;
mod data;
mod filter;
mod parser;
fn main() -> Result<(), Box<dyn std::error::Error>> {
let cards = serde_json::from_reader::<_, CardInfo>(std::io::BufReader::new(std::fs::File::open("cards.json")?))?.data;
let search_cards: Vec<_> = cards.iter().map(SearchCard::from).collect();
let cards_by_id: HashMap<_, _> = cards.into_iter().map(|c| (c.id, c)).collect();
let raw_query = std::env::args().nth(1).unwrap();
let query = parse_filters(&raw_query)?;
search_cards.iter().filter(|card| query.iter().all(|q| q(card))).for_each(|c| println!("{}", cards_by_id.get(&c.id).unwrap()));
let query = parser::parse_filters(&raw_query)?;
for c in search_cards.iter().filter(|card| query.iter().all(|q| q(card))) {
println!("{}", cards_by_id.get(&c.id).unwrap());
}
Ok(())
}
fn parse_filters(input: &str) -> Result<Vec<CardFilter>, String> {
parse_raw_filters(input).map_err(|e| format!("Error while parsing filters “{input}”: {e:?}")).and_then(|(rest, v)| {
if rest.is_empty() {
Ok(v.into_iter().map(build_filter).collect::<Result<Vec<_>, _>>()?)
} else {
Err(format!("Input was not fully parsed. Left over: “{rest}”"))
}
})
}
fn parse_raw_filters(input: &str) -> IResult<&str, Vec<RawCardFilter>> {
many1(parse_raw_filter)(input)
}
fn parse_raw_filter(input: &str) -> IResult<&str, RawCardFilter> {
preceded(
multispace0,
alt((
complete(tuple((field, operator, value))),
map_res(take_until1(" "), |q| fallback_filter(q)),
// I would like to use `rest` here, but that results in a pattern that can be empty
// which can lead to infinite loops while parsing and is therefore disallowed by nom.
// I would need something like rest1 or a way to assert that the rest isn’t empty.
map_res(alphanumeric1, |q| fallback_filter(q)),
)),
)(input)
}
fn fallback_filter(query: &str) -> Result<RawCardFilter, String> {
if query.contains(&OPERATOR_CHARS[..]) {
return Err(format!("Invalid query: {query}"));
}
#[cfg(debug_assertions)]
println!("Trying to match {query} as card name");
let q = query.to_lowercase();
Ok((Field::Name, Operator::Equals, Value::String(q)))
}
fn build_filter(query: RawCardFilter) -> Result<CardFilter, String> {
dbg!(&query);
Ok(match query {
(Field::Atk, op, Value::Numerical(n)) => Box::new(move |card| op.filter_number(card.atk, n)),
(Field::Def, op, Value::Numerical(n)) => Box::new(move |card| op.filter_number(card.def, n)),
// ? ATK/DEF is modeled as None in the source json. At least for some monsters.
// Let’s at least find those.
(Field::Atk, _, Value::String(s)) if s == "?" => Box::new(move |card| card.atk.is_none() && card.card_type.contains("monster")),
(Field::Def, _, Value::String(s)) if s == "?" => {
Box::new(move |card| card.def.is_none() && card.link_rating.is_none() && card.card_type.contains("monster"))
}
(Field::Level, op, Value::Numerical(n)) => Box::new(move |card| op.filter_number(card.level, n)),
(Field::Type, Operator::Equals, Value::String(s)) => Box::new(move |card| card.r#type == s),
(Field::Class, Operator::Equals, Value::String(s)) => Box::new(move |card| card.card_type.contains(&s)),
(Field::Text, Operator::Equals, Value::String(s)) => Box::new(move |card| card.text.contains(&s)),
(Field::Name, Operator::Equals, Value::String(s)) => Box::new(move |card| card.name.contains(&s)),
q => Err(format!("unknown query: {q:?}"))?,
})
}
fn field(input: &str) -> IResult<&str, Field> {
map_res(take_while(char::is_alphabetic), str::parse)(input)
}
const OPERATOR_CHARS: &[char] = &['=', '<', '>', ':'];
fn operator(input: &str) -> IResult<&str, Operator> {
map_res(take_while_m_n(1, 2, |c| OPERATOR_CHARS.contains(&c)), str::parse)(input)
}
fn value(input: &str) -> IResult<&str, Value> {
map_res(alt((take_until1(" "), rest)), |i: &str| match i.parse() {
Ok(n) => Ok(Value::Numerical(n)),
Err(_) if i.is_empty() => Err("empty filter argument"),
Err(_) => Ok(Value::String(i.to_lowercase())),
})(input)
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
enum Field {
Atk,
Def,
Level,
Type,
Attribute,
Class,
Name,
Text,
}
impl FromStr for Field {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(match s.to_lowercase().as_ref() {
"atk" => Self::Atk,
"def" => Self::Def,
"level" | "l" => Self::Level,
"type" | "t" => Self::Type,
"attribute" | "attr" | "a" => Self::Attribute,
"c" | "class" => Self::Class,
"o" | "eff" | "text" | "effect" | "e" => Self::Text,
_ => Err(s.to_string())?,
})
}
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
enum Operator {
Equals,
Less,
LessEqual,
Greater,
GreaterEqual,
}
impl Operator {
pub fn filter_number(&self, a: Option<i32>, b: i32) -> bool {
if let Some(a) = a {
match self {
Self::Equals => a == b,
Self::Less => a < b,
Self::LessEqual => a <= b,
Self::Greater => a > b,
Self::GreaterEqual => a >= b,
}
} else {
false
}
}
}
impl FromStr for Operator {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(match s {
"=" | "==" | ":" => Self::Equals,
">=" | "=>" => Self::GreaterEqual,
"<=" | "=<" => Self::LessEqual,
">" => Self::Greater,
"<" => Self::Less,
_ => Err(s.to_owned())?,
})
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
enum Value {
String(String),
Numerical(i32),
}
#[derive(Debug, Deserialize, PartialEq, Eq, Clone)]
struct CardInfo {
data: Vec<Card>,
}
#[derive(Debug, Deserialize, PartialEq, Eq, Clone, Default)]
struct Card {
id: usize,
#[serde(rename = "type")]
card_type: String,
name: String,
#[serde(rename = "desc")]
text: String,
// Will also be None for ?
atk: Option<i32>,
def: Option<i32>,
attribute: Option<String>,
#[serde(rename = "race")]
r#type: String,
// also includes rank
level: Option<i32>,
#[serde(rename = "linkval")]
link_rating: Option<i32>,
#[serde(rename = "linkmarkers")]
link_arrows: Option<Vec<String>>,
}
/// A struct derived from `Card` that has all fields lowercased for easier search
#[derive(Debug, PartialEq, Eq, Clone)]
struct SearchCard {
id: usize,
card_type: String,
name: String,
text: String,
atk: Option<i32>,
def: Option<i32>,
attribute: Option<String>,
r#type: String,
// also includes rank
level: Option<i32>,
link_rating: Option<i32>,
link_arrows: Option<Vec<String>>,
}
impl From<&Card> for SearchCard {
fn from(card: &Card) -> Self {
Self {
id: card.id,
card_type: card.card_type.to_lowercase(),
name: card.name.to_lowercase(),
text: card.text.to_lowercase(),
atk: card.atk,
def: card.def,
attribute: card.attribute.as_ref().map(|s| s.to_lowercase()),
r#type: card.r#type.to_lowercase(),
level: card.level,
link_rating: card.link_rating,
link_arrows: card.link_arrows.as_ref().map(|arrows| arrows.iter().map(|a| a.to_lowercase()).collect()),
}
}
}
impl Display for Card {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{} (", &self.name)?;
if let Some(level) = self.level {
write!(f, "Level {level} ")?;
} else if let Some(lr) = self.link_rating {
write!(f, "Link {lr} ")?;
}
if let Some(attr) = &self.attribute {
write!(f, "{attr}/")?;
}
write!(f, "{} {})", self.r#type, self.card_type)?;
if self.card_type.contains(&String::from("Monster")) {
match (self.atk, self.def) {
(Some(atk), Some(def)) => write!(f, " {atk} ATK / {def} DEF")?,
(Some(atk), None) if self.link_rating.is_some() => write!(f, "{atk} ATK")?,
(None, Some(def)) => write!(f, " ? ATK / {def} DEF")?,
(Some(atk), None) => write!(f, " {atk} ATK / ? DEF")?,
(None, None) => write!(f, " ? ATK / ? DEF")?,
}
}
Ok(())
}
}
#[cfg(test)]
mod tests {
use super::*;
const RAW_SPELL: &str = r#"
{
"id": 41142615,
"name": "The Cheerful Coffin",
"type": "Spell Card",
"desc": "Discard up to 3 Monster Cards from your hand to the Graveyard.",
"race": "Normal"
}"#;
const RAW_MONSTER: &str = r#"
{
"id": 2326738,
"name": "Des Lacooda",
"type": "Effect Monster",
"desc": "Once per turn: You can change this card to face-down Defense Position. When this card is Flip Summoned: Draw 1 card.",
"atk": 500,
"def": 600,
"level": 3,
"race": "Zombie",
"attribute": "EARTH"
}"#;
#[test]
fn test_spell() {
let coffin: Card = serde_json::from_str(RAW_SPELL).unwrap();
assert_eq!(
coffin,
Card {
id: 41142615,
card_type: "Spell Card".to_owned(),
name: "The Cheerful Coffin".to_owned(),
text: "Discard up to 3 Monster Cards from your hand to the Graveyard.".to_owned(),
r#type: "Normal".to_owned(),
..Default::default()
}
)
}
#[test]
fn test_monster() {
let munch: Card = serde_json::from_str(RAW_MONSTER).unwrap();
assert_eq!(
munch,
Card {
id: 2326738,
card_type: "Effect Monster".to_owned(),
name: "Des Lacooda".to_owned(),
text:
"Once per turn: You can change this card to face-down Defense Position. When this card is Flip Summoned: Draw 1 card."
.to_owned(),
atk: Some(500),
def: Some(600),
level: Some(3),
r#type: "Zombie".to_owned(),
attribute: Some("EARTH".to_owned()),
..Default::default()
},
)
}
#[test]
fn query_parsing_test() {
assert_eq!(parse_raw_filter("t:PYro"), Ok(("", (Field::Type, Operator::Equals, Value::String("pyro".into())))));
assert_eq!(parse_raw_filter("t=pyro"), Ok(("", (Field::Type, Operator::Equals, Value::String("pyro".into())))));
assert_eq!(parse_raw_filter("t==pyro"), Ok(("", (Field::Type, Operator::Equals, Value::String("pyro".into())))));
assert_eq!(parse_raw_filter("atk>=100"), Ok(("", (Field::Atk, Operator::GreaterEqual, Value::Numerical(100)))));
assert_eq!(parse_raw_filter("Necrovalley"), Ok(("", (Field::Name, Operator::Equals, Value::String("necrovalley".into())))));
assert_eq!(parse_raw_filter("l=10"), Ok(("", (Field::Level, Operator::Equals, Value::Numerical(10)))));
let (rest, filter) = parse_raw_filter("atk>=100 l:4").unwrap();
assert_eq!(filter, (Field::Atk, Operator::GreaterEqual, Value::Numerical(100)));
assert_eq!(parse_raw_filter(rest), Ok(("", (Field::Level, Operator::Equals, Value::Numerical(4)))));
assert_eq!(
parse_raw_filters("atk>=100 l:4"),
Ok((
"",
vec![(Field::Atk, Operator::GreaterEqual, Value::Numerical(100)), (Field::Level, Operator::Equals, Value::Numerical(4))]
))
);
// These will fail during conversion
assert!(parse_filters("l===10").is_err());
assert!(parse_filters("t=").is_err());
assert!(parse_filters("=100").is_err());
assert!(parse_filters("atk<=>1").is_err());
}
#[test]
fn level_filter_test() {
let lacooda = SearchCard::from(&serde_json::from_str::<Card>(RAW_MONSTER).unwrap());
let filter_level_3 = parse_filters("l=3").unwrap();
assert!(filter_level_3[0](&lacooda));
let filter_level_5 = parse_filters("l=5").unwrap();
assert!(!filter_level_5[0](&lacooda));
}
}

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src/parser.rs Normal file
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use std::str::FromStr;
use crate::filter::{build_filter, fallback_filter, CardFilter, RawCardFilter};
use nom::{
branch::alt,
bytes::complete::{take_until1, take_while, take_while_m_n},
character::complete::multispace0,
combinator::{complete, map_res, rest, verify},
multi::many_m_n,
sequence::{preceded, tuple},
IResult,
};
pub fn parse_filters(input: &str) -> Result<Vec<CardFilter>, String> {
parse_raw_filters(input).map_err(|e| format!("Error while parsing filters “{input}”: {e:?}")).and_then(|(rest, v)| {
if rest.is_empty() {
v.into_iter().map(build_filter).collect()
} else {
Err(format!("Input was not fully parsed. Left over: “{rest}”"))
}
})
}
fn parse_raw_filters(input: &str) -> IResult<&str, Vec<RawCardFilter>> {
many_m_n(1, 32, parse_raw_filter)(input)
}
fn word_non_empty(input: &str) -> IResult<&str, &str> {
verify(alt((take_until1(" "), rest)), |s: &str| s.len() >= 2)(input)
}
fn parse_raw_filter(input: &str) -> IResult<&str, RawCardFilter> {
preceded(multispace0, alt((complete(tuple((field, operator, value))), map_res(word_non_empty, |q| fallback_filter(q)))))(input)
}
fn field(input: &str) -> IResult<&str, Field> {
map_res(take_while(char::is_alphabetic), str::parse)(input)
}
pub const OPERATOR_CHARS: &[char] = &['=', '<', '>', ':'];
fn operator(input: &str) -> IResult<&str, Operator> {
map_res(take_while_m_n(1, 2, |c| OPERATOR_CHARS.contains(&c)), str::parse)(input)
}
fn value(input: &str) -> IResult<&str, Value> {
map_res(alt((take_until1(" "), rest)), |i: &str| match i.parse() {
Ok(n) => Ok(Value::Numerical(n)),
Err(_) if i.is_empty() => Err("empty filter argument"),
Err(_) => Ok(Value::String(i.to_lowercase())),
})(input)
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum Field {
Atk,
Def,
Level,
Type,
Attribute,
Class,
Name,
Text,
}
impl FromStr for Field {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(match s.to_lowercase().as_ref() {
"atk" => Self::Atk,
"def" => Self::Def,
"level" | "l" => Self::Level,
"type" | "t" => Self::Type,
"attribute" | "attr" | "a" => Self::Attribute,
"c" | "class" => Self::Class,
"o" | "eff" | "text" | "effect" | "e" => Self::Text,
_ => Err(s.to_string())?,
})
}
}
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
pub enum Operator {
Equals,
Less,
LessEqual,
Greater,
GreaterEqual,
}
impl Operator {
pub fn filter_number(&self, a: Option<i32>, b: i32) -> bool {
if let Some(a) = a {
match self {
Self::Equals => a == b,
Self::Less => a < b,
Self::LessEqual => a <= b,
Self::Greater => a > b,
Self::GreaterEqual => a >= b,
}
} else {
false
}
}
}
impl FromStr for Operator {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(match s {
"=" | "==" | ":" => Self::Equals,
">=" | "=>" => Self::GreaterEqual,
"<=" | "=<" => Self::LessEqual,
">" => Self::Greater,
"<" => Self::Less,
_ => Err(s.to_owned())?,
})
}
}
#[derive(Debug, PartialEq, Eq, Clone)]
pub enum Value {
String(String),
Numerical(i32),
}
#[cfg(test)]
mod tests {
use super::*;
use test_case::test_case;
#[test_case("t=pyro" => Ok(("", (Field::Type, Operator::Equals, Value::String("pyro".into())))))]
#[test_case("t:PYro" => Ok(("", (Field::Type, Operator::Equals, Value::String("pyro".into())))); "input is lowercased")]
#[test_case("t==warrior" => Ok(("", (Field::Type, Operator::Equals, Value::String("warrior".into())))))]
#[test_case("atk>=100" => Ok(("", (Field::Atk, Operator::GreaterEqual, Value::Numerical(100)))))]
#[test_case("Necrovalley" => Ok(("", (Field::Name, Operator::Equals, Value::String("necrovalley".into())))))]
#[test_case("l=10" => Ok(("", (Field::Level, Operator::Equals, Value::Numerical(10)))))]
#[test_case("Ib" => Ok(("", (Field::Name, Operator::Equals, Value::String("ib".to_owned())))))]
fn successful_parsing_test(input: &str) -> IResult<&str, RawCardFilter> {
parse_raw_filter(input)
}
#[test_case("atk<=>1")]
#[test_case("l===10")]
#[test_case("t=")]
#[test_case("=100")]
#[test_case("a")]
fn unsuccessful_parsing_test(input: &str) {
assert!(parse_filters(input).is_err());
}
#[test]
fn sequential_parsing_test() {
let (rest, filter) = parse_raw_filter("atk>=100 l:4").unwrap();
assert_eq!(filter, (Field::Atk, Operator::GreaterEqual, Value::Numerical(100)));
assert_eq!(parse_raw_filter(rest), Ok(("", (Field::Level, Operator::Equals, Value::Numerical(4)))));
assert_eq!(
parse_raw_filters("atk>=100 l:4"),
Ok((
"",
vec![(Field::Atk, Operator::GreaterEqual, Value::Numerical(100)), (Field::Level, Operator::Equals, Value::Numerical(4))]
))
);
}
}