#[derive(Clone, Copy, Debug, PartialEq)]
pub enum WritingStyle {
Upper, Lower, Title, LowerCamel, UpperCamel, }
pub fn get_parts(name: &str) -> Vec<String> {
name.split('-').map(String::from).collect()
}
pub fn apply_style(style: WritingStyle, separator: &str, names: &[String]) -> String {
let names: Vec<String> = match style {
WritingStyle::Upper => names.iter().map(|n| n.to_uppercase()).collect(),
WritingStyle::Lower => names.iter().map(|n| n.to_lowercase()).collect(),
WritingStyle::Title => {
if let Some(first) = names.first() {
let mut new_names = vec![up_first_char(first)];
for next_name in &names[1..] {
new_names.push(next_name.to_lowercase());
}
new_names
} else {
vec![]
}
}
WritingStyle::LowerCamel => {
if let Some(first) = names.first() {
let mut new_names = vec![first.to_lowercase()];
for next_name in &names[1..] {
new_names.push(up_first_char(next_name));
}
new_names
} else {
vec![]
}
}
WritingStyle::UpperCamel => names.iter().map(|n| up_first_char(n)).collect(),
};
names.join(separator)
}
fn up_first_char(name: &str) -> String {
let mut chars = name.chars();
match chars.next() {
Some(c) => c.to_uppercase().chain(chars).collect(),
None => String::new(),
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_styles() {
let text = get_parts("aaa-bbb-ccc");
assert_eq!("AAA_BBB_CCC", apply_style(WritingStyle::Upper, "_", &text));
assert_eq!("aaa_bbb_ccc", apply_style(WritingStyle::Lower, "_", &text));
assert_eq!("Aaa_bbb_ccc", apply_style(WritingStyle::Title, "_", &text));
assert_eq!(
"aaa_Bbb_Ccc",
apply_style(WritingStyle::LowerCamel, "_", &text)
);
assert_eq!(
"Aaa_Bbb_Ccc",
apply_style(WritingStyle::UpperCamel, "_", &text)
);
}
}