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//! Converts the `subject` to a selected case.
/// Converts the `subject` to camel case.
///
/// # Arguments
///
/// * `subject` - The string to convert to camel case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::camel_case("bird flight");
/// // => "birdFlight"
/// case::camel_case("BirdFlight");
/// // => "birdFlight"
/// case::camel_case("-BIRD-FLIGHT-");
/// // => "birdFlight"
/// use voca_rs::Voca;
/// "bird flight"._camel_case();
/// // => "birdFlight"
/// ```
pub fn camel_case(subject: &str) -> String {
camel_and_pascal_case(subject, TitleMode::Normal)
}
#[derive(Clone, Copy, PartialEq)]
enum TitleMode {
Normal,
Caps,
}
fn camel_and_pascal_case(subject: &str, title_mode: TitleMode) -> String {
return match subject.len() {
0 => subject.to_string(),
_ => return_string(subject, title_mode),
};
fn return_string(subject: &str, title_mode: TitleMode) -> String {
let mut res = String::with_capacity(subject.len());
for (i, c) in crate::split::words(subject).iter().enumerate() {
let s = if i == 0 && title_mode == TitleMode::Normal {
lower_case(c)
} else {
capitalize(c, true)
};
res.push_str(&s);
}
res
}
}
/// Converts the first character of `subject` to upper case. If `restToLower` is `true`, convert the rest of `subject` to lower case.
///
/// # Arguments
///
/// * `subject` - The string to capitalize.
/// * `rest_to_lower` - Convert the rest of `subject` to lower case.
///
/// # Example
///
/// ```
/// use voca_rs::*;
/// case::capitalize("green", true);
/// // => "Green"
/// case::capitalize("Say Hello to ME", true);
/// // => "Say hello to me"
/// use voca_rs::Voca;
/// "green"._capitalize(true);
/// // => "Green"
/// ```
pub fn capitalize(subject: &str, rest_to_lower: bool) -> String {
let rest_to_lower_mode = if rest_to_lower {
RestMode::Lower
} else {
RestMode::Normal
};
capitalize_decapitalize(subject, rest_to_lower_mode, CapsMode::Caps)
}
#[derive(Clone, Copy, PartialEq)]
enum RestMode {
Lower,
Normal,
}
#[derive(Clone, Copy, PartialEq)]
enum CapsMode {
Caps,
Small,
}
fn capitalize_decapitalize(subject: &str, rest_mode: RestMode, caps_mode: CapsMode) -> String {
return match subject.len() {
0 => subject.to_string(),
_ => return_string(subject, rest_mode, caps_mode),
};
fn return_string(subject: &str, rest_mode: RestMode, caps_mode: CapsMode) -> String {
let mut res = String::with_capacity(subject.len());
for (i, c) in crate::split::chars(subject).iter().enumerate() {
let s = if i == 0 {
match caps_mode {
CapsMode::Caps => c.to_uppercase(),
CapsMode::Small => c.to_lowercase(),
}
} else {
match rest_mode {
RestMode::Lower => c.to_lowercase(),
RestMode::Normal => (*c).to_string(),
}
};
res.push_str(&s);
}
res
}
}
/// Converts the first character of `subject` to lower case. If `restToLower` is `true`, convert the rest of `subject` to lower case.
///
/// # Arguments
///
/// * `subject` - The string to decapitalize.
/// * `rest_to_lower` - Convert the rest of `subject` to lower case.
/// # Example
///
/// ```
/// use voca_rs::*;
/// case::decapitalize("Green", true);
/// // => "green"
/// case::decapitalize("Say Hello to ME", false);
/// // => "say Hello to ME"
/// use voca_rs::Voca;
/// "Green"._decapitalize(true);
/// // => "green"
/// ```
pub fn decapitalize(subject: &str, rest_to_lower: bool) -> String {
let rest_to_lower_mode = if rest_to_lower {
RestMode::Lower
} else {
RestMode::Normal
};
capitalize_decapitalize(subject, rest_to_lower_mode, CapsMode::Small)
}
/// Converts the `subject` to kebab case.
///
/// # Arguments
///
/// * `subject` - The string to convert to kebab case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::kebab_case("goodbye blue sky");
/// // => "goodbye-blue-sky"
/// case::kebab_case("GoodbyeBlueSky");
/// // => "goodbye-blue-sky"
/// case::kebab_case("-Goodbye-Blue-Sky-");
/// // => "goodbye-blue-sky"
/// use voca_rs::Voca;
/// "goodbye blue sky"._kebab_case();
/// // => "goodbye-blue-sky"
/// ```
pub fn kebab_case(subject: &str) -> String {
kebab_and_shouty_kebab_and_train_case(subject, KebabMode::Normal)
}
/// Converts the `subject` to SHOUTY kebab case.
///
/// # Arguments
///
/// * `subject` - The string to convert to SHOUTY kebab case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::shouty_kebab_case("goodbye blue sky");
/// // => "GOODBYE-BLUE-SKY"
/// case::shouty_kebab_case("GoodbyeBlueSky");
/// // => "GOODBYE-BLUE-SKY"
/// case::shouty_kebab_case("-Goodbye-Blue-Sky-");
/// // => "GOODBYE-BLUE-SKY"
/// use voca_rs::Voca;
/// "goodbye blue sky"._shouty_kebab_case();
/// // => "GOODBYE-BLUE-SKY"
/// ```
pub fn shouty_kebab_case(subject: &str) -> String {
kebab_and_shouty_kebab_and_train_case(subject, KebabMode::Shouty)
}
#[derive(Clone, Copy, PartialEq)]
enum KebabMode {
Normal,
Shouty,
Train,
}
fn kebab_and_shouty_kebab_and_train_case(subject: &str, kebab_mode: KebabMode) -> String {
match subject.len() {
0 => subject.to_string(),
_ => crate::split::words(subject)
.into_iter()
.map(|c| match kebab_mode {
KebabMode::Normal => lower_case(c),
KebabMode::Shouty => upper_case(c),
KebabMode::Train => capitalize(c, true),
})
.collect::<Vec<String>>()
.join("-"),
}
}
/// Converts the `subject` to lower case.
///
/// # Arguments
///
/// * `subject` - The string to convert to lower case.
///
/// # Example
///
/// ```
/// use voca_rs::*;
/// case::lower_case("Green");
/// // => "green"
/// case::lower_case("Say Hello to ME");
/// // => "say hello to me"
/// use voca_rs::Voca;
/// "Green"._lower_case();
/// // => "green"
/// ```
pub fn lower_case(subject: &str) -> String {
match subject.len() {
0 => subject.to_string(),
_ => {
let mut res = String::with_capacity(subject.len());
for c in crate::split::chars(subject).iter() {
res.push_str(&c.to_lowercase());
}
res
}
}
}
/// Converts the `subject` to pascal case.
///
/// # Arguments
///
/// * `subject` - The string to convert to pascal case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::pascal_case("bird flight");
/// // => "BirdFlight"
/// case::pascal_case("BirdFlight");
/// // => "BirdFlight"
/// case::pascal_case("-BIRD-FLIGHT-");
/// // => "BirdFlight"
/// use voca_rs::Voca;
/// "bird flight"._pascal_case();
/// // => "BirdFlight"
/// ```
pub fn pascal_case(subject: &str) -> String {
camel_and_pascal_case(subject, TitleMode::Caps)
}
/// Converts the `subject` to snake case.
///
/// # Arguments
///
/// * `subject` - The string to convert to snake case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::snake_case("learning to fly");
/// // => "learning_to_fly"
/// case::snake_case("LearningToFly");
/// // => "learning_to_fly"
/// case::snake_case("-Learning-To-Fly-");
/// // => "learning_to_fly"
/// use voca_rs::Voca;
/// "learning to fly"._snake_case();
/// // => "learning_to_fly"
/// ```
pub fn snake_case(subject: &str) -> String {
snake_and_shouty_snake_case(subject, false)
}
/// Converts the `subject` to SHOUTY snake case.
///
/// # Arguments
///
/// * `subject` - The string to convert to shouty snake case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::shouty_snake_case("learning to fly");
/// // => "LEARNING_TO_FLY"
/// case::shouty_snake_case("LearningToFly");
/// // => "LEARNING_TO_FLY"
/// case::shouty_snake_case("-Learning-To-Fly-");
/// // => "LEARNING_TO_FLY"
/// use voca_rs::Voca;
/// "learning to fly"._shouty_snake_case();
/// // => "LEARNING_TO_FLY"
/// ```
pub fn shouty_snake_case(subject: &str) -> String {
snake_and_shouty_snake_case(subject, true)
}
fn snake_and_shouty_snake_case(subject: &str, shouty: bool) -> String {
match subject.len() {
0 => subject.to_string(),
_ => crate::split::words(subject)
.into_iter()
.map(|c| {
if shouty {
upper_case(c)
} else {
lower_case(c)
}
})
.collect::<Vec<String>>()
.join("_"),
}
}
/// Converts the uppercase alpha characters of `subject` to lowercase and lowercase characters to uppercase.
///
/// # Arguments
///
/// * `subject` - The string to swap the case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::swap_case("League of Shadows");
/// // => "lEAGUE OF sHADOWS"
/// case::swap_case("2 üBer Bees");
/// // => "2 ÜbER bEES"
/// use voca_rs::Voca;
/// "League of Shadows"._swap_case();
/// // => "lEAGUE OF sHADOWS"
/// ```
pub fn swap_case(subject: &str) -> String {
match subject.len() {
0 => subject.to_string(),
_ => crate::split::chars(subject)
.into_iter()
.map(|s| {
s.chars()
.filter_map(|c| {
if c.is_lowercase() {
c.to_uppercase().next()
} else {
c.to_lowercase().next()
}
})
.collect()
})
.collect::<Vec<String>>()
.join(""),
}
}
/// Converts the `subject` to title case.
///
/// # Arguments
///
/// * `subject` - The string to convert to title case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::title_case("bird flight");
/// // => "Bird Flight"
/// case::title_case("BirdFlight");
/// // => "Bird Flight"
/// case::title_case("-BIRD-FLIGHT-");
/// // => "Bird Flight"
/// use voca_rs::Voca;
/// "bird flight"._title_case();
/// // => "Bird Flight"
/// ```
pub fn title_case(subject: &str) -> String {
match subject.len() {
0 => subject.to_string(),
_ => crate::split::words(subject)
.into_iter()
.map(|c| capitalize(c, true))
.collect::<Vec<String>>()
.join(" "),
}
}
/// Converts the `subject` to train case.
///
/// # Arguments
///
/// * `subject` - The string to convert to train case.
///
/// # Example
/// ```
/// use voca_rs::*;
/// case::train_case("goodbye blue sky");
/// // => "Goodbye-Blue-Sky"
/// case::train_case("GoodbyeBlueSky");
/// // => "Goodbye-Blue-Sky"
/// case::train_case("-Goodbye-Blue-Sky-");
/// // => "Goodbye-Blue-Sky"
/// use voca_rs::Voca;
/// "goodbye blue sky"._train_case();
/// // => "Goodbye-Blue-Sky"
/// ```
pub fn train_case(subject: &str) -> String {
kebab_and_shouty_kebab_and_train_case(subject, KebabMode::Train)
}
/// Converts the `subject` to upper case.
///
/// # Arguments
///
/// * `subject` - The string to convert to upper case.
///
/// # Example
///
/// ```
/// use voca_rs::*;
/// case::upper_case("Green");
/// // => "GREEN"
/// case::upper_case("Say Hello to ME");
/// // => "SAY HELLO TO ME"
/// use voca_rs::Voca;
/// "Green"._upper_case();
/// // => "GREEN"
/// ```
pub fn upper_case(subject: &str) -> String {
match subject.len() {
0 => subject.to_string(),
_ => {
let mut res = String::with_capacity(subject.len());
for c in crate::split::chars(subject).iter() {
res.push_str(&c.to_uppercase());
}
res
}
}
}
/// Converts the first character of the `subject` to lower case.
///
/// # Arguments
///
/// * `subject` - The string to convert.
///
/// # Example
///
/// ```
/// use voca_rs::*;
/// case::lower_first("Fred");
/// // => "fred"
/// case::lower_first("FRED");
/// // => "fRED"
/// use voca_rs::Voca;
/// "Fred"._lower_first();
/// // => "fred"
/// ```
pub fn lower_first(subject: &str) -> String {
decapitalize(subject, false)
}
/// Converts the first character of the `subject` to upper case.
///
/// # Arguments
///
/// * `subject` - The string to convert.
///
/// # Example
///
/// ```
/// use voca_rs::*;
/// case::upper_first("fred");
/// // => "Fred"
/// case::upper_first("FRED");
/// // => "FRED"
/// use voca_rs::Voca;
/// "fred"._upper_first();
/// // => "Fred"
/// ```
pub fn upper_first(subject: &str) -> String {
capitalize(subject, false)
}