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use std::fmt::{Display, Formatter, Result as FmtResult};
use globset::{GlobBuilder, GlobMatcher};
use regex::{Regex, RegexBuilder};
use crate::config::option::CaseSensitivity;
use crate::error::JoshutoResult;
#[derive(Clone, Debug, Default)]
pub enum MatchContext {
Glob(GlobMatcher),
Regex(Regex),
String {
pattern: String,
actual_case_sensitivity: CaseSensitivity,
},
#[default]
None,
}
impl MatchContext {
pub fn new_glob(pattern: &str, case_sensitivity: CaseSensitivity) -> JoshutoResult<Self> {
let pattern_lower = pattern.to_lowercase();
let (pattern, actual_case_sensitivity) = match case_sensitivity {
CaseSensitivity::Insensitive => (pattern_lower.as_str(), CaseSensitivity::Insensitive),
CaseSensitivity::Sensitive => (pattern, CaseSensitivity::Sensitive),
// Determine the actual case sensitivity by whether an uppercase letter occurs.
CaseSensitivity::Smart => {
if pattern_lower == pattern {
(pattern_lower.as_str(), CaseSensitivity::Insensitive)
} else {
(pattern, CaseSensitivity::Sensitive)
}
}
};
let glob = GlobBuilder::new(pattern)
.case_insensitive(matches!(
actual_case_sensitivity,
CaseSensitivity::Insensitive
))
.build()?
.compile_matcher();
Ok(Self::Glob(glob))
}
pub fn new_regex(pattern: &str, case_sensitivity: CaseSensitivity) -> JoshutoResult<Self> {
let pattern_lower = pattern.to_lowercase();
let (pattern, actual_case_sensitivity) = match case_sensitivity {
CaseSensitivity::Insensitive => (pattern_lower.as_str(), CaseSensitivity::Insensitive),
CaseSensitivity::Sensitive => (pattern, CaseSensitivity::Sensitive),
// Determine the actual case sensitivity by whether an uppercase letter occurs.
CaseSensitivity::Smart => {
if pattern_lower == pattern {
(pattern_lower.as_str(), CaseSensitivity::Insensitive)
} else {
(pattern, CaseSensitivity::Sensitive)
}
}
};
let re = RegexBuilder::new(pattern)
.case_insensitive(matches!(
actual_case_sensitivity,
CaseSensitivity::Insensitive
))
.build()?;
Ok(Self::Regex(re))
}
pub fn new_string(pattern: &str, case_sensitivity: CaseSensitivity) -> Self {
let (pattern, actual_case_sensitivity) = match case_sensitivity {
CaseSensitivity::Insensitive => (pattern.to_lowercase(), CaseSensitivity::Insensitive),
CaseSensitivity::Sensitive => (pattern.to_string(), CaseSensitivity::Sensitive),
// Determine the actual case sensitivity by whether an uppercase letter occurs.
CaseSensitivity::Smart => {
if pattern.chars().all(|c| c.is_lowercase()) {
// All characters in `pattern` is lowercase
(pattern.to_string(), CaseSensitivity::Insensitive)
} else {
(pattern.to_string(), CaseSensitivity::Sensitive)
}
}
};
Self::String {
pattern,
actual_case_sensitivity,
}
}
pub fn is_match(&self, main: &str) -> bool {
match self {
Self::Glob(glob_matcher) => Self::is_match_glob(main, glob_matcher),
Self::Regex(regex) => Self::is_match_regex(main, regex),
Self::String {
pattern,
actual_case_sensitivity,
} => Self::is_match_string(main, pattern, *actual_case_sensitivity),
Self::None => true,
}
}
fn is_match_glob(main: &str, glob_matcher: &GlobMatcher) -> bool {
glob_matcher.is_match(main)
}
fn is_match_regex(main: &str, regex: &Regex) -> bool {
match regex.find(main) {
Some(res) => res.range() == (0..main.len()),
None => false,
}
}
fn is_match_string(
main: &str,
pattern: &str,
actual_case_sensitivity: CaseSensitivity,
) -> bool {
match actual_case_sensitivity {
CaseSensitivity::Insensitive => main.to_lowercase().contains(pattern),
CaseSensitivity::Sensitive => main.contains(pattern),
CaseSensitivity::Smart => unreachable!(),
}
}
pub fn is_none(&self) -> bool {
matches!(self, Self::None)
}
}
impl Display for MatchContext {
fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult {
match self {
Self::Glob(glob_matcher) => write!(f, "{}", glob_matcher.glob().glob()),
Self::Regex(regex) => write!(f, "{}", regex.as_str()),
Self::String { pattern, .. } => write!(f, "{pattern}"),
Self::None => Ok(()),
}
}
}
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