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pub mod words;
use rand::seq::SliceRandom;
use rand::thread_rng;
use words::{ADJECTIVES, NOUNS, VERBS};
pub fn id<S>(separator: S, should_capitalize: bool) -> String
where
S: Into<String>,
{
let mut rng = thread_rng();
let map = |x: &&str| {
if should_capitalize {
capitalize(*x)
} else {
x.to_string()
}
};
[
ADJECTIVES.choose(&mut rng).map(map).unwrap().to_string(),
NOUNS.choose(&mut rng).map(map).unwrap().to_string(),
VERBS.choose(&mut rng).map(map).unwrap().to_string(),
]
.join(&separator.into())
}
fn capitalize<S>(input: S) -> String
where
S: Into<String>,
{
let string = input.into();
let mut chars = string.chars();
match chars.next() {
None => String::new(),
Some(first) => first.to_uppercase().collect::<String>() + chars.as_str(),
}
}
#[cfg(test)]
mod tests {
use crate::id;
use crate::words::{ADJECTIVES, NOUNS, VERBS};
fn extract_capitals<S>(s: S, separator: Option<String>) -> String
where
S: Into<String>,
{
s.into()
.chars()
.filter_map(|c| {
let ch = c.to_string();
if separator == Some(ch.to_owned()) {
return None;
}
if c.to_uppercase().collect::<String>() == ch {
Some(c)
} else {
None
}
})
.collect::<String>()
}
#[test]
fn it_works_with_separator_and_no_capitalize() {
let the_id = id("-", false);
let capitals = extract_capitals(&the_id, Some("-".to_owned()));
let parts = the_id.split("-").collect::<Vec<&str>>();
assert_eq!(capitals.len(), 0);
assert_eq!(parts.len(), 3);
assert_eq!(ADJECTIVES.contains(&parts[0]), true);
assert_eq!(NOUNS.contains(&parts[1]), true);
assert_eq!(VERBS.contains(&parts[2]), true);
}
#[test]
fn it_works_without_separator_and_capitalized() {
let the_id = id("", true);
let uppercase_chars = extract_capitals(&the_id, None);
assert_eq!(uppercase_chars.len(), 3);
}
}