ftml 0.5.0

Foundation Text Markup Language - a library to render Wikidot text as HTML
Documentation 
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/*
 * data/image_alignment.rs
 *
 * ftml - Library to parse Wikidot text
 * Copyright (C) 2019-2021 Wikijump Team
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

// TODO use data
#![allow(dead_code)]

use regex::Regex;
use std::convert::TryFrom;

lazy_static! {
    static ref IMAGE_ALIGNMENT_REGEX: Regex = Regex::new(r"(f?[<>])|=").unwrap();
}

#[derive(Serialize, Deserialize, Debug, Copy, Clone, Hash, PartialEq, Eq)]
#[serde(rename_all = "kebab-case")]
pub enum Alignment {
    Left,
    Right,
    Center,
    Justify,
}

impl<'a> TryFrom<&'a str> for Alignment {
    type Error = ();

    fn try_from(value: &'a str) -> Result<Self, Self::Error> {
        match value {
            "<" => Ok(Alignment::Left),
            ">" => Ok(Alignment::Right),
            "=" => Ok(Alignment::Center),
            "==" => Ok(Alignment::Justify),
            _ => Err(()),
        }
    }
}

#[derive(Serialize, Deserialize, Debug, Copy, Clone, PartialEq, Eq)]
#[serde(rename_all = "kebab-case")]
pub struct ImageAlignment {
    pub align: Alignment,
    pub float: bool,
}

impl ImageAlignment {
    pub fn parse(text: &str) -> Option<Self> {
        let (align, float) = match text {
            "=" => (Alignment::Center, false),
            "<" => (Alignment::Left, false),
            ">" => (Alignment::Right, false),
            "f<" => (Alignment::Left, true),
            "f>" => (Alignment::Right, true),
            _ => return None,
        };

        Some(ImageAlignment { align, float })
    }
}