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use linked_hash_map::LinkedHashMap;
use super::ElementDef;
use super::PropertyDef;

/// Alias to reduce coupling with `LinkedHashMap`
pub type KeyMap<V> = LinkedHashMap<String, V>;

/// Convenience trait to assure consistency between map key and name attribute of stored element.
pub trait Addable<V: Key> {
    /// Takes a value that provides a key and stores it under the given key.
    fn add(&mut self, new_value: V);
}


impl<V: Key> Addable<V> for KeyMap<V> {
    fn add(&mut self, value: V) {
        self.insert(value.get_key(), value);
    }
}

/// Convenience trait to assure consistency between the key used for storage and the name of the elment.
pub trait Key {
    /// Returns a key under which the element should be stored in a key-value store.
    fn get_key(&self) -> String;
}
impl Key for ElementDef {
    fn get_key(&self) -> String {
        self.name.clone()
    }
}

impl Key for PropertyDef {
    fn get_key(&self) -> String {
        self.name.clone()
    }
}