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// License: see LICENSE file at root directory of `master` branch //! # Globs use std::{ borrow::Cow, collections::HashSet, }; use crate::Glob; /// # Globs /// /// This struct contains a set of [`Glob`][::Glob]'s. /// /// [::Glob]: struct.Glob.html #[derive(Debug, Eq, PartialEq)] pub struct Globs<'a> { /// # Globs globs: HashSet<Glob<'a>>, } impl<'a> Globs<'a> { /// # Makes new instance from an iterator of [`Cow<'a, str>`][r::Cow] /// /// ## Notes /// /// - Empty strings will be ignored. /// - If the iterator contains no globs, `None` is returned. /// /// ## Examples /// /// ``` /// use sub_strs::Globs; /// /// let globs = Globs::from("*.rs|*.md".split('|').map(|s| s.into())).unwrap(); /// assert!(globs.any("this.rs")); /// assert!(globs.any("that.md")); /// assert!(globs.any("not-this") == false); /// ``` /// /// [r::Cow]: https://doc.rust-lang.org/std/borrow/enum.Cow.html pub fn from<I>(strs: I) -> Option<Self> where I: Iterator<Item=Cow<'a, str>> { let globs: HashSet<_> = strs.filter_map(|s| match s.is_empty() { true => None, false => Some(Glob::from(s)), }).collect(); match globs.is_empty() { true => None, false => Some(Self { globs, }) } } /// # Merges an iterator of [`Globs<'a>`][::Globs] into one /// /// If there are no inner [`Glob`][::Glob]'s, `None` is returned. /// /// ## Examples /// /// ``` /// use sub_strs::Globs; /// /// let program_args = &["*.svg,*.OGG", "*.md"]; /// let globs = Globs::merge( /// program_args.iter().filter_map(|s| /// Globs::from(s.to_lowercase().split(',').map(|s| s.to_string().into())) /// ) /// ); /// assert!(globs.map(|g| g.any("some.ogg")).unwrap_or(false)); /// ``` /// /// [::Glob]: struct.Glob.html /// [::Globs]: struct.Globs.html pub fn merge<I>(iter: I) -> Option<Self> where I: Iterator<Item=Self> { let result = iter.fold(Self { globs: HashSet::new() }, |mut result, item| { result.globs.extend(item.globs); result }); match result.globs.is_empty() { true => None, false => Some(result), } } /// # Checks if _any_ glob inside matches the input string pub fn any<S>(&self, s: S) -> bool where S: AsRef<str> { self.globs.iter().any(|g| g.matches(&s)) } }