leap_lang/
naming.rs

1#[derive(Clone, Copy, Debug, PartialEq)]
2pub enum WritingStyle {
3    Upper,      // UPPER WRITING STYLE
4    Lower,      // lower writing style
5    Title,      // Title writing style
6    LowerCamel, // lower Camel Writing Style
7    UpperCamel, // Upeer Camel Writing Style
8}
9
10pub fn get_parts(name: &str) -> Vec<String> {
11    name.split('-').map(String::from).collect()
12}
13
14pub fn apply_style(style: WritingStyle, separator: &str, names: &[String]) -> String {
15    let names: Vec<String> = match style {
16        WritingStyle::Upper => names.iter().map(|n| n.to_uppercase()).collect(),
17        WritingStyle::Lower => names.iter().map(|n| n.to_lowercase()).collect(),
18        WritingStyle::Title => {
19            if let Some(first) = names.first() {
20                let mut new_names = vec![up_first_char(first)];
21                for next_name in &names[1..] {
22                    new_names.push(next_name.to_lowercase());
23                }
24                new_names
25            } else {
26                vec![]
27            }
28        }
29        WritingStyle::LowerCamel => {
30            if let Some(first) = names.first() {
31                let mut new_names = vec![first.to_lowercase()];
32                for next_name in &names[1..] {
33                    new_names.push(up_first_char(next_name));
34                }
35                new_names
36            } else {
37                vec![]
38            }
39        }
40        WritingStyle::UpperCamel => names.iter().map(|n| up_first_char(n)).collect(),
41    };
42    names.join(separator)
43}
44
45fn up_first_char(name: &str) -> String {
46    let mut chars = name.chars();
47    match chars.next() {
48        Some(c) => c.to_uppercase().chain(chars).collect(),
49        None => String::new(),
50    }
51}
52
53#[cfg(test)]
54mod tests {
55    use super::*;
56
57    #[test]
58    fn test_styles() {
59        let text = get_parts("aaa-bbb-ccc");
60        assert_eq!("AAA_BBB_CCC", apply_style(WritingStyle::Upper, "_", &text));
61        assert_eq!("aaa_bbb_ccc", apply_style(WritingStyle::Lower, "_", &text));
62        assert_eq!("Aaa_bbb_ccc", apply_style(WritingStyle::Title, "_", &text));
63        assert_eq!(
64            "aaa_Bbb_Ccc",
65            apply_style(WritingStyle::LowerCamel, "_", &text)
66        );
67        assert_eq!(
68            "Aaa_Bbb_Ccc",
69            apply_style(WritingStyle::UpperCamel, "_", &text)
70        );
71    }
72}
leap_lang/naming.rs

leap_lang/
naming.rs
