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use std::{
convert::TryFrom,
fmt,
fmt::{Display, Formatter},
slice::Iter,
vec::IntoIter,
};
use crate::{body::Body, fragment::Fragment, trailer::Trailer};
/// A collection of user input [`CommitMessage`] text
///
/// # Examples
///
/// ```
/// use mit_commit::{Bodies, Body, Subject};
///
/// let bodies: Vec<Body> = Vec::default();
/// assert_eq!(None, Bodies::from(bodies).first());
///
/// let bodies: Vec<Body> = vec![
/// Body::from("First"),
/// Body::from("Second"),
/// Body::from("Third"),
/// ];
/// assert_eq!(Some(Body::from("First")), Bodies::from(bodies).first());
/// ```
#[derive(Debug, PartialEq, Eq, Clone, Default)]
pub struct Bodies<'a> {
bodies: Vec<Body<'a>>,
}
impl<'a> Bodies<'a> {
/// Get the first [`Body`] in this list of [`Bodies`]
///
/// # Examples
///
/// ```
/// use mit_commit::{Bodies, Body, Subject};
///
/// let bodies: Vec<Body> = Vec::default();
/// assert_eq!(None, Bodies::from(bodies).first());
///
/// let bodies: Vec<Body> = vec![
/// Body::from("First"),
/// Body::from("Second"),
/// Body::from("Third"),
/// ];
/// assert_eq!(Some(Body::from("First")), Bodies::from(bodies).first());
/// ```
#[must_use]
pub fn first(&self) -> Option<Body<'_>> {
self.bodies.first().cloned()
}
/// Iterate over the [`Body`] in the [`Bodies`]
///
/// # Examples
///
/// ```
/// use mit_commit::{Bodies, Body};
/// let bodies = Bodies::from(vec![
/// Body::from("Body 1"),
/// Body::from("Body 2"),
/// Body::from("Body 3"),
/// ]);
/// let mut iterator = bodies.iter();
///
/// assert_eq!(iterator.next(), Some(&Body::from("Body 1")));
/// assert_eq!(iterator.next(), Some(&Body::from("Body 2")));
/// assert_eq!(iterator.next(), Some(&Body::from("Body 3")));
/// assert_eq!(iterator.next(), None);
/// ```
pub fn iter(&self) -> Iter<'_, Body<'_>> {
self.bodies.iter()
}
}
impl<'a> IntoIterator for Bodies<'a> {
type IntoIter = IntoIter<Body<'a>>;
type Item = Body<'a>;
/// Iterate over the [`Body`] in the [`Bodies`]
///
/// # Examples
///
/// ```
/// use mit_commit::{Bodies, Body};
/// let bodies = Bodies::from(vec![
/// Body::from("Body 1"),
/// Body::from("Body 2"),
/// Body::from("Body 3"),
/// ]);
/// let mut iterator = bodies.into_iter();
///
/// assert_eq!(iterator.next(), Some(Body::from("Body 1")));
/// assert_eq!(iterator.next(), Some(Body::from("Body 2")));
/// assert_eq!(iterator.next(), Some(Body::from("Body 3")));
/// assert_eq!(iterator.next(), None);
/// ```
fn into_iter(self) -> Self::IntoIter {
self.bodies.into_iter()
}
}
impl<'a> Display for Bodies<'a> {
/// Render the [`Bodies`] as text
///
/// # Examples
///
/// ```
/// use mit_commit::{Bodies, Body};
/// let bodies = Bodies::from(vec![
/// Body::from("Body 1"),
/// Body::from("Body 2"),
/// Body::from("Body 3"),
/// ]);
///
/// assert_eq!(format!("{}", bodies), "Body 1\n\nBody 2\n\nBody 3");
/// ```
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
write!(f, "{}", String::from(self.clone()))
}
}
impl<'a> From<Vec<Body<'a>>> for Bodies<'a> {
/// Combine a [`Vec`] of [`Body`] into [`Bodies`]
///
/// # Examples
///
/// ```
/// use mit_commit::{Bodies, Body};
/// let bodies = Bodies::from(vec![
/// Body::from("Body 1"),
/// Body::from("Body 2"),
/// Body::from("Body 3"),
/// ]);
/// let mut iterator = bodies.into_iter();
///
/// assert_eq!(iterator.next(), Some(Body::from("Body 1")));
/// assert_eq!(iterator.next(), Some(Body::from("Body 2")));
/// assert_eq!(iterator.next(), Some(Body::from("Body 3")));
/// assert_eq!(iterator.next(), None);
/// ```
fn from(bodies: Vec<Body<'a>>) -> Self {
Self { bodies }
}
}
impl<'a> From<Bodies<'a>> for String {
fn from(bodies: Bodies<'_>) -> Self {
bodies
.bodies
.into_iter()
.map(Self::from)
.collect::<Vec<_>>()
.join("\n\n")
}
}
impl<'a> From<Vec<Fragment<'a>>> for Bodies<'a> {
fn from(bodies: Vec<Fragment<'a>>) -> Self {
let raw_body = bodies
.iter()
.filter_map(|values| {
if let Fragment::Body(body) = values {
Some(body.clone())
} else {
None
}
})
.collect::<Vec<_>>();
let trailer_count = raw_body
.clone()
.into_iter()
.rev()
.take_while(|body| body.is_empty() || Trailer::try_from(body.clone()).is_ok())
.count();
let mut non_trailer_item_count = raw_body.len() - trailer_count;
non_trailer_item_count = non_trailer_item_count.saturating_sub(1);
raw_body
.into_iter()
.enumerate()
.skip(1)
.take(non_trailer_item_count)
.map(|(_, body)| body)
.collect::<Vec<Body<'_>>>()
.into()
}
}