src/bib/bibmain.rs


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137<// bibiman - a TUI for managing BibLaTeX databases
// Copyright (C) 2024  lukeflo
//
// 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, 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 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 <https://www.gnu.org/licenses/>.
/////

use biblatex::{self, Bibliography};
use biblatex::{ChunksExt, Type};
use itertools::Itertools;
use std::{fs, path::PathBuf};

#[derive(Debug)]
pub enum FileFormat {
    BibLatex,
    Hayagriva,
}

// Set necessary fields
// TODO: can surely be made more efficient/simpler
#[derive(Debug)]
pub struct BibiMain {
    pub bibfile: PathBuf,           // path to bibfile
    pub bibfile_format: FileFormat, // Format of passed file
    pub bibfilestring: String,      // content of bibfile as string
    pub bibliography: Bibliography, // parsed bibliography
    pub citekeys: Vec<String>,      // list of all citekeys
    pub keyword_list: Vec<String>,  // list of all available keywords
    pub entry_list: Vec<BibiData>,  // List of all entries
}

#[derive(Debug, Clone)]
pub struct BibiData {
    pub authors: String,
    pub title: String,
    pub year: String,
    pub pubtype: String,
    pub keywords: String,
    pub citekey: String,
    pub abstract_text: String,
    pub doi_url: String,
    pub filepath: String,
}

impl BibiMain {
    pub fn new(main_bibfile: PathBuf) -> Self {
        // TODO: Needs check for config file path as soon as config file is impl
        let bibfile_format = Self::check_file_format(&main_bibfile);
        let bibfile = main_bibfile;
        let bibfilestring = fs::read_to_string(&bibfile).unwrap();
        let bibliography = biblatex::Bibliography::parse(&bibfilestring).unwrap();
        let citekeys = Self::get_citekeys(&bibliography);
        let keyword_list = Self::collect_tag_list(&citekeys, &bibliography);
        let entry_list = Self::create_entry_list(&citekeys, &bibliography);
        Self {
            bibfile,
            bibfile_format,
            bibfilestring,
            bibliography,
            citekeys,
            keyword_list,
            entry_list,
        }
    }

    // Check which file format the passed file has
    fn check_file_format(main_bibfile: &PathBuf) -> FileFormat {
        let extension = main_bibfile.extension().unwrap().to_str();

        match extension {
            Some("yml") => FileFormat::Hayagriva,
            Some("yaml") => FileFormat::Hayagriva,
            Some("bib") => FileFormat::BibLatex,
            Some(_) => panic!("The extension {:?} is no valid bibfile", extension.unwrap()),
            None => panic!("The given path {:?} holds no valid file", main_bibfile),
        }
    }

    fn create_entry_list(citekeys: &[String], bibliography: &Bibliography) -> Vec<BibiData> {
        citekeys
            .into_iter()
            .map(|k| BibiData {
                authors: Self::get_authors(&k, &bibliography),
                title: Self::get_title(&k, &bibliography),
                year: Self::get_year(&k, &bibliography),
                pubtype: Self::get_pubtype(&k, &bibliography),
                keywords: Self::get_keywords(&k, &bibliography),
                citekey: k.to_owned(),
                abstract_text: Self::get_abstract(&k, &bibliography