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use std::str;
use chrono::{DateTime, Local};
use nom::{is_alphanumeric, IResult};
#[derive(Serialize)]
pub struct Commit {
pub sha: String,
pub author: String,
pub time: String,
pub summary: String,
pub number: Option<u32>,
pub lines: Vec<Line>,
}
#[derive(Default, Serialize)]
pub struct Line {
pub scope: Option<String>,
pub category: Option<String>,
pub text: Option<String>,
}
pub fn parse(lines: &[String], dt_format: &str) -> Commit {
Commit {
sha: lines[0].clone(),
author: lines[1].clone(),
number: parse_number(&lines[3]),
summary: parse_subject(&lines[3]),
time: parse_time(&lines[2], dt_format),
lines: lines[4..].iter().map(|s| parse_line(s)).collect(),
}
}
pub fn parse_time(line: &str, format: &str) -> String {
DateTime::parse_from_rfc2822(line)
.map(|t| t.with_timezone(&Local))
.unwrap_or_else(|_| Local::now())
.format(format)
.to_string()
}
pub fn parse_subject(line: &str) -> String {
let first_open = line.find("(#").unwrap_or_else(|| line.len());
String::from(line.get(0..first_open).unwrap_or_else(|| line).trim())
}
pub fn parse_number(line: &str) -> Option<u32> {
let last_open = line.rfind("(#");
let last_close = line.rfind(')');
if last_open.is_none() || last_close.is_none() {
None
} else {
let end = last_close.unwrap();
let start = last_open.unwrap() + "(#".len();
let num = line.get(start..end).map(|s| s.parse().ok());
num.unwrap_or(None)
}
}
pub fn parse_line(line: &str) -> Line {
match tagged_change(line) {
IResult::Done(_, l) => l,
_ => Line::default(),
}
}
named!(tagged_change<&str, Line>,
alt!(
category_scope_change
| category_scope
| category_change
| just_category
| just_change
));
named!(category_scope_change<&str, Line>,
do_parse!(
tag!("-") >> category: tagname >>
tag!("(") >> scope: tagname >>
tag!("):") >> text: whatever >>
(Line{
scope: Some(scope),
category: Some(category),
text: Some(text),
})));
named!(category_scope<&str, Line>,
do_parse!(
tag!("-") >> category: tagname >>
tag!("(") >> scope: tagname >>
tag!("):") >>
(Line{
scope: Some(scope),
category: Some(category),
text: None,
})));
named!(just_category<&str, Line>,
do_parse!(
tag!("-") >> category: tagname >>
tag!(":") >>
(Line{
scope: None,
category: Some(category),
text: None,
})));
named!(category_change<&str, Line>,
do_parse!(
tag!("-") >> category: tagname >>
tag!(":") >> text: whatever >>
(Line{
scope: None,
category: Some(category),
text: Some(text),
})));
named!(just_change<&str, Line>,
do_parse!(opt!(ws!(tag!("-"))) >>
text: whatever >>
(Line{
scope: None,
category: None,
text: Some(text),
})));
named!(whatever<&str, String>,
map!(take_while1_s!(|_| true), String::from));
named!(tagname<&str, String>,
map!(ws!(take_while1_s!(|c| is_alphanumeric(c as u8))), str::to_lowercase));