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extern crate regex;
#[macro_use]
extern crate lazy_static;

mod tests;

pub mod validators;

/// A ValidationChain is the foundation for everything you want to validate.
///
/// # Examples
///
/// ```
/// use gild::ValidationChain;
/// use gild::validators;
///
/// ValidationChain::new()
///    .add(validators::Empty::new(false));
///
/// ValidationChain::new()
///    .add(validators::Empty::new(false))
///    .validate(String::from("I want to validate this."))
///    .is_ok();
/// ```
pub struct ValidationChain {
    chain: Vec<Box<ValidatorCondition>>
}

pub trait ValidatorCondition {
    fn validate(&self, input: String) -> bool {
        unimplemented!()
    }

    fn get_err_message(&self) -> String {
        unimplemented!()
    }
}

impl ValidationChain {
    pub fn new() -> Self {
        ValidationChain { chain: Vec::new() }
    }

    pub fn add(&mut self, condition: Box<ValidatorCondition>) -> &mut Self {
        self.chain.push(condition);

        self
    }

    pub fn validate(&self, s: String) -> Result<String, String> {
        for condition in self.chain.iter() {
            if !condition.validate(s.clone()) {
                return Err(condition.get_err_message())
            }
        }

        Ok(s.clone())
    }
}