Shiva

Shiva library: Implementation in Rust of a parser and generator for documents of any type

Features

• Common Document Model (CDM) for all document types
• Parsers produce CDM
• Generators consume CDM

Common Document Model

Supported document types

Document type	Parse	Generate
Plain text	+	+
Markdown	+	+
HTML	+	+
PDF	+	+
JSON	+	+
XML	+	+
CSV	+	+
RTF	+	-
DOCX	+	-
XLS	+	-
XLSX	+	+
ODS	+	+
Typst	-	+

Parse document features

Document type	Header	Paragraph	List	Table	Image	Hyperlink	PageHeader	PageFooter
Plain text	-	+	-	-	-	-	-	-
Markdown	+	+	+	+	+	+	-	-
HTML	+	+	+	+	+	+	-	-
PDF	-	+	+	-	-	-	-	-
DOCX	+	+	+	+	-	+	+	+
RTF	+	+	+	+	-	+	+	+
JSON	+	+	+	+	-	+	+	+
XML	+	+	+	+	+	+	+	+
CSV	-	-	-	+	-	-	-	-
XLS	-	-	-	+	-	-	-	-
XLSX	-	-	-	+	-	-	-	-
ODS	-	-	-	+	-	-	-	-

Generate document features

Document type	Header	Paragraph	List	Table	Image	Hyperlink	PageHeader	PageFooter
Plain text	+	+	+	+	-	+	+	+
Markdown	+	+	+	+	+	+	+	+
HTML	+	+	+	+	+	+	-	-
PDF	+	+	+	+	+	+	+	+
JSON	+	+	+	+	-	+	+	+
XML	+	+	+	+	+	+	+	+
CSV	-	-	-	+	-	-	-	-
XLSX	-	-	-	+	-	-	-	-
ODS	-	-	-	+	-	-	-	-
Typst	+	+	+	+	+	+	+	+

Usage Shiva library

Cargo.toml

[dependencies]
shiva = {  version = "1.0.0", features = ["html", "markdown", "text", "pdf", "json", 
    "csv", "rtf", "docx", "xml", "xls", "xlsx", "ods", "typst"] }

main.rs

fn main() {
    let input_vec = std::fs::read("input.html").unwrap();
    let input_bytes = bytes::Bytes::from(input_vec);
    let document = shiva::html::Transformer::parse(&input_bytes).unwrap();
    let output_bytes = shiva::markdown::Transformer::generate(&document).unwrap();
    std::fs::write("out.md", output_bytes).unwrap();
}

Shiva CLI & Server

Build executable Shiva CLI and Shiva Server

git clone https://github.com/igumnoff/shiva.git
cd shiva/cli
cargo build --release

Run executable Shiva CLI

cd ./target/release/
./shiva --input-format=markdown --output-format=html --input-file=README.md --output-file=README.html

Run Shiva Server

cd ./target/release/
./shiva-server --port=8080 --host=127.0.0.1

Who uses Shiva

• Metatron library: Implementation in Rust of a report generation

Contributing

I would love to see contributions from the community. If you experience bugs, feel free to open an issue. If you would like to implement a new feature or bug fix, please follow the steps:

1. Read "Contributor License Agreement (CLA)"
2. Contact with me via telegram @ievkz or discord @igumnovnsk
3. Confirm e-mail invitation in repository
4. Do "git clone" (You don't need to fork!)
5. Create branch with your assigned issue
6. Create pull request to main branch

For contributors

If you would like add new document type, you need to implement the following traits:

Required: shiva::core::TransformerTrait

pub trait TransformerTrait {
    fn parse(document: &Bytes) -> anyhow::Result<Document>;
    fn generate(document: &Document) -> anyhow::Result<Bytes>;
}

Optional shiva::core::TransformerWithImageLoaderSaverTrait (If images store outside of document for example: HTML, Markdown)

pub trait TransformerWithImageLoaderSaverTrait {
    fn parse_with_loader<F>(document: &Bytes,  image_loader: F) -> anyhow::Result<Document>
        where F: Fn(&str) -> anyhow::Result<Bytes>;
    fn generate_with_saver<F>(document: &Document,  image_saver: F) -> anyhow::Result<Bytes>
        where F: Fn(&Bytes, &str) -> anyhow::Result<()>;
}