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use super::string_formatter::StringFormatterError;
use super::StringFormatter;
use versions::Versioning;
pub struct VersionFormatter<'a> {
formatter: StringFormatter<'a>,
}
impl<'a> VersionFormatter<'a> {
/// Creates an instance of a VersionFormatter from a format string
///
/// Like the StringFormatter, this will throw an error when the string isn't
/// parseable.
pub fn new(format: &'a str) -> Result<Self, StringFormatterError> {
let formatter = StringFormatter::new(format)?;
Ok(Self { formatter })
}
/// Formats a version structure into a readable string
///
/// No matter what comes in, this will return some usable string
pub fn format_version(self, version: &str) -> String {
let parsed = Versioning::new(version);
let formatted = self
.formatter
.map(|variable| match variable {
"raw" => Some(Ok(version.to_string())),
"major" => match parsed.as_ref() {
Some(Versioning::Ideal(v)) => Some(Ok(v.major.to_string())),
Some(Versioning::General(v)) => Some(Ok(v.nth_lenient(0)?.to_string())),
_ => None,
},
"minor" => match parsed.as_ref() {
Some(Versioning::Ideal(v)) => Some(Ok(v.minor.to_string())),
Some(Versioning::General(v)) => Some(Ok(v.nth_lenient(1)?.to_string())),
_ => None,
},
"patch" => match parsed.as_ref() {
Some(Versioning::Ideal(v)) => Some(Ok(v.patch.to_string())),
Some(Versioning::General(v)) => Some(Ok(v.nth_lenient(2)?.to_string())),
_ => None,
},
_ => None,
})
.parse(None);
match formatted {
Ok(segments) => segments
.iter()
.map(|segment| segment.value.as_str())
.collect::<Vec<&str>>()
.join(""),
Err(_) => version.to_string(),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_semver_full() {
const FORMAT_STR: &str = "major:${major} minor:${minor} patch:${patch} raw:${raw}";
let result = VersionFormatter::new(FORMAT_STR)
.unwrap()
.format_version("1.2.3");
assert_eq!(result, "major:1 minor:2 patch:3 raw:1.2.3");
}
#[test]
fn test_semver_partial() {
const FORMAT_STR: &str = "major:${major} minor:${minor} patch:${patch} raw:${raw}";
let result = VersionFormatter::new(FORMAT_STR)
.unwrap()
.format_version("1.2");
assert_eq!(result, "major:1 minor:2 patch: raw:1.2");
}
#[test]
fn test_general() {
const FORMAT_STR: &str = "major:${major} minor:${minor} patch:${patch} raw:${raw}";
let result = VersionFormatter::new(FORMAT_STR)
.unwrap()
.format_version("1.2-a.3");
assert_eq!(result, "major:1 minor:2 patch: raw:1.2-a.3");
}
#[test]
fn test_mess() {
const FORMAT_STR: &str = "major:${major} minor:${minor} patch:${patch} raw:${raw}";
let result = VersionFormatter::new(FORMAT_STR)
.unwrap()
.format_version("utter junk");
assert_eq!(result, "major: minor: patch: raw:utter junk");
}
}
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