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//  Copyright (C) 2015 Steven Allen
//
//  This file is part of gazetta.
//
//  This program is free software: you can redistribute it and/or modify it under the terms of the
//  GNU General Public License as published by the Free Software Foundation version 3 of the
//  License.
//
//  This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
//  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
//  the GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License along with this program.  If
//  not, see <http://www.gnu.org/licenses/>.
//

use gazetta_core::model::Meta;
use gazetta_core::yaml::Hash;

use crate::link::Link;
use crate::person::Person;
use crate::util::BubbleResult;
use crate::yaml::*;

pub struct SourceMeta {
    pub nav: Vec<Link>,
    pub author: Person,
}

impl Meta for SourceMeta {
    fn from_yaml(mut meta: Hash) -> Result<SourceMeta, &'static str> {
        Ok(SourceMeta {
            nav: meta
                .remove(&NAV)
                .map(Link::many_from_yaml)
                .bubble_result()?
                .unwrap_or_else(Vec::new),
            author: meta
                .remove(&AUTHOR)
                .map(Person::from_yaml)
                .bubble_result()?
                .ok_or("websites must have authors")?,
        })
    }
}

pub struct EntryMeta {
    pub author: Option<Person>,
    pub about: Option<Person>,
}

impl Meta for EntryMeta {
    fn from_yaml(mut meta: Hash) -> Result<EntryMeta, &'static str> {
        Ok(EntryMeta {
            author: meta
                .remove(&AUTHOR)
                .map(Person::from_yaml)
                .bubble_result()?,
            about: meta.remove(&ABOUT).map(Person::from_yaml).bubble_result()?,
        })
    }
}