# Prepyrus

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Prepyrus is a tool for verifying and processing MDX files
that contain citations in Chicago author-date style and certain metadata.

⚠️ This tool is still in early development and API may frequently change.

## Usage

Add the crate to your `Cargo.toml` and use it as shown below:

```toml
[dependencies]
prepyrus = "0.2"
```

Main API interface is the `Prepyrus` impl. Example usage:

```rust
use prepyrus::Prepyrus;

fn main() {
    let args = vec![
        "_program_index".to_string(),
        "tests/mocks/test.bib".to_string(), // bibliography file
        "tests/mocks/data".to_string(), // target directory or .mdx file
        "verify".to_string(), // mode
        "tests/mocks/data/development.mdx".to_string(), // optional ignore paths, separate with commas if multiple
    ];

    let _ = run(args).unwrap_or_else(|e| {
        eprintln!("Error: {}", e);
        std::process::exit(1);
    });

    println!("Prepyrus completed successfully!");
}

fn run(args: Vec<String>) -> Result<(), Box<dyn std::error::Error>> {
    let config = Prepyrus::build_config(&args, None)?;
    let all_entries = Prepyrus::get_all_bib_entries(&config.bib_file).unwrap();
    let mdx_paths =
        Prepyrus::get_mdx_paths(&config.target_path, Some(config.settings.ignore_paths))?;

    // Phase 1: Verify MDX files
    let articles_file_data = Prepyrus::verify(mdx_paths, &all_entries)?;

    // Phase 2: Process MDX files (requires mode to be set to "process")
    if config.mode == "process" {
        Prepyrus::process(articles_file_data);
    }

    Ok(())
}
```

`verify` mode only verifies the citations in the MDX files against the bibliography.

**⚠️ NOTE: This mode modifies the MDX files.**

`process` mode _additionally_ processes the MDX files by injecting bibliography and other details into the MDX files.

## Description

The tool is designed to work with MDX files that contain citations in Chicago author-date style. Examples:

> "...nowhere on heaven or on earth is there anything which does not contain both being and nothing in itself" (Hegel 2010, 61).

The tool parses and verifies the citations in the MDX files against a
bibliography file in BibTeX format (using Biblatex).
If the citations are valid, the tool processes the MDX files
by adding a bibliography section at the end of the file.
It also adds author, editor, and contributor from the MDX file metadata if available.
Finally, it also adds a notes heading at the end if footnotes are present in the file.

## Limitations

The tool currently only supports citations in Chicago author-date style.
Only book entries are currently supported (plans to support more types in the future).
Only the following metadata fields from the target `.mdx` files are supported:

- author
- editor
- contributor

## Examples

To see a working implementation of prepyrus, please visit the [sPhil repo](https://github.com/systemphil/sphil).

## Acknowledgements

Thanks to Typst's [biblatex](https://github.com/typst/biblatex) package for providing an awesome library for parsing BibTex files, the people behind serde and regex Rust crates and the Rust community!

## License

Apache-2.0