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use yew::prelude::*;
use std::cell::RefCell;
use std::ops::Deref;
use std::rc::Rc;
use crate::viewmodel::*;

pub mod main;
pub mod name;
pub mod address;
pub mod telephone;
pub mod dates;
pub mod organizational;

#[derive(Clone, PartialEq, Properties)]
pub struct InputProps<O, C> 
    where   O: VCardPropertyInputObject<C> + Clone,
            C: VCardPropertyInputComponent<O> + Clone 
{
    pub generated: Callback<O>,
    pub weak_link: WeakComponentLink<C>,
}

/// Trait for types that represent an input component for a vcard property.
pub trait VCardPropertyInputComponent<T: VCardPropertyInputObject<Self>>: Component + Clone + PartialEq {
    /// Returns the object containing the input data.
    fn get_input_object(&self) -> T;
    /// Getter function for the title of the component
    fn get_title(&self) -> String;
    /// Getter function for an eventual error.
    fn get_error(&self) -> Option<Error>;
    /// Returns the error as `Html`
    fn render_error(&self) -> Html {
        html!{
            <>
                {
                    if self.get_error().is_some() {
                        html!{
                            <div class="notification is-danger is-light">
                                { self.get_error().unwrap().msg }
                            </div>
                        }
                    } else {
                        html!{}
                    }
                }
            </>
        }
    }
}

/// Weak link; Useful for being able to have a list of subcomponents.
pub struct WeakComponentLink<COMP: Component>(Rc<RefCell<Option<ComponentLink<COMP>>>>);

impl<COMP: Component> Clone for WeakComponentLink<COMP> {
    fn clone(&self) -> Self {
        Self(Rc::clone(&self.0))
    }
}

impl<COMP: Component> Default for WeakComponentLink<COMP> {
    fn default() -> Self {
        Self(Rc::default())
    }
}

impl<COMP: Component> Deref for WeakComponentLink<COMP> {
    type Target = Rc<RefCell<Option<ComponentLink<COMP>>>>;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl<COMP: Component> PartialEq for WeakComponentLink<COMP> {
    fn eq(&self, other: &Self) -> bool {
        Rc::ptr_eq(&self.0, &other.0)
    }
}