scraps 1.2.0

Scraps is a portable CLI knowledge hub for managing interconnected Markdown documentation with Wiki-link notation.
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use crate::error::anyhow::Context;
use std::io::{BufWriter, Write};
use std::{fs::File, path::PathBuf};

use crate::error::{BuildError, ScrapsResult};

use crate::usecase::build::model::css::CssMetadata;

use super::css_tera;

pub struct CSSRender {
    static_dir_path: PathBuf,
    output_dir_path: PathBuf,
}

impl CSSRender {
    pub fn new(static_dir_path: &PathBuf, output_dir_path: &PathBuf) -> CSSRender {
        CSSRender {
            static_dir_path: static_dir_path.to_owned(),
            output_dir_path: output_dir_path.to_owned(),
        }
    }

    pub fn render_main(&self, css_metadata: &CssMetadata) -> ScrapsResult<()> {
        let (tera, context) = css_tera::base(
            self.static_dir_path.join("*.css").to_str().unwrap(),
            &css_metadata.color_scheme,
        )?;
        let template_name = if tera.get_template_names().any(|t| t == "main.css") {
            "main.css"
        } else {
            "__builtins/main.css"
        };
        let file_path = &self.output_dir_path.join("main.css");
        // tera renders in many small writes, so buffer them into one file write.
        let mut wtr = BufWriter::new(
            File::create(file_path).context(BuildError::WriteFailure(file_path.clone()))?,
        );
        tera.render_to(template_name, &context, &mut wtr)
            .context(BuildError::WriteFailure(file_path.clone()))?;
        wtr.flush()
            .context(BuildError::WriteFailure(file_path.clone()))
    }
}

#[cfg(test)]
mod tests {
    use crate::test_fixtures::{temp_scrap_project, TempScrapProject};
    use crate::usecase::build::model::color_scheme::ColorScheme;
    use rstest::rstest;

    use super::*;
    use std::fs;
    use std::io::{BufWriter, Write};

    #[rstest]
    fn test_render_main(#[from(temp_scrap_project)] project: TempScrapProject) {
        // Add static CSS template
        project.add_static_file("main.css", b":root { color-scheme: {{ color_scheme }};}");

        let css_metadata = &CssMetadata::new(&ColorScheme::OsSetting);

        // Run render
        let render = CSSRender::new(&project.static_dir, &project.output_dir);
        render.render_main(css_metadata).unwrap();

        let result = fs::read_to_string(project.output_path("main.css")).unwrap();
        assert_eq!(result, ":root { color-scheme: light dark;}");
    }
}