simulacrumparty
/
casaubon


			
				
					
						
						
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							use chrono::NaiveDate;
use pulldown_cmark::{html, Parser};
use regex::Regex;

use std::fs;
use std::path;

use config::Config;

#[derive(Debug, PartialEq)]
pub enum EntryKind {
    Page,
    Post,
}

#[derive(Debug)]
pub struct Entry {
    pub kind: EntryKind,
    pub title: String,
    pub slug: String,
    pub body: String,
    pub date: Option<NaiveDate>,
}

impl Entry {
    fn render(&self, template: &str, config: &Config) -> String {
        let parser = Parser::new(&self.body);
        let mut html_buf = String::new();
        html::push_html(&mut html_buf, parser);
        let formatted_date = match self.date {
            Some(date) => date.format("%Y-%m-%d").to_string(),
            None => String::from(""),
        };
        template
            .replace(
                "{{ page_title }}",
                &format!("{} | {}", &self.title, &config.site_name),
            )
            .replace("{{ title }}", &self.title)
            .replace("{{ slug }}", &self.slug)
            .replace("{{ body }}", &html_buf.to_string())
            .replace("{{ date }}", &formatted_date)
    }
}

pub fn read_entry_dir(cwd: &path::Path) -> Vec<fs::DirEntry> {
    match fs::read_dir(cwd) {
        Ok(entries) => entries.into_iter().map(|entry| entry.unwrap()).collect(),
        Err(err) => panic!(err),
    }
}

pub fn parse_entry(kind: EntryKind, contents: &str, path: &path::Path) -> Entry {
    lazy_static! {
        static ref RE_WITH_DATE: Regex =
            Regex::new(r"^# (?P<title>.*) \| (?P<date>\d{4}-\d{2}-\d{2})\n\n(?s)(?P<body>.*)")
                .unwrap();
        static ref RE_WITHOUT_DATE: Regex =
            Regex::new(r"^# (?P<title>.*)\n\n(?s)(?P<body>.*)").unwrap();
        static ref SLUG_RE: Regex = Regex::new(r"(?P<slug>\S+).md").unwrap();
    }

    let filename = &path.file_name().unwrap().to_str().unwrap();
    let slug = SLUG_RE
        .captures(filename)
        .expect("Couldn't parse slug from filename")["slug"]
        .to_string();

    if kind == EntryKind::Post {
        let captures = &RE_WITH_DATE
            .captures(&contents)
            .expect("Couldn't parse post");
        let title = captures["title"].to_string();
        let body = captures["body"].to_string();
        let date = Some(
            NaiveDate::parse_from_str(&captures["date"], "%Y-%m-%d").expect("Couldn't parse date"),
        );
        Entry {
            kind,
            title,
            body,
            slug,
            date,
        }
    } else {
        let captures = &RE_WITHOUT_DATE
            .captures(&contents)
            .expect("Couldn't parse page");
        let title = captures["title"].to_string();
        let body = captures["body"].to_string();
        Entry {
            kind,
            title,
            body,
            slug,
            date: None,
        }
    }
}

pub fn write_entry(
    cwd: &path::Path,
    layout: &str,
    post_template: &str,
    entry: &Entry,
    config: &Config,
) {
    let root_path = match entry.kind {
        EntryKind::Post => cwd.join("public").join("posts").join(&entry.slug),
        EntryKind::Page => cwd.join("public").join(&entry.slug),
    };

    match fs::create_dir(&root_path) {
        Ok(_) => {}
        Err(err) => match err.kind() {
            std::io::ErrorKind::AlreadyExists => {}
            _ => panic!(err),
        },
    }

    let template = layout.replace("{{ contents }}", &post_template);

    fs::write(
        &root_path.join("index.html"),
        entry.render(&template, &config),
    )
    .expect("Unable to write file");
}

pub fn write_entry_listing(
    cwd: &path::Path,
    layout: &str,
    post_listing_template: &str,
    post_item_template: &str,
    posts: &Vec<Entry>,
    config: &Config,
) {
    fs::write(
        cwd.join("public").join("index.html"),
        render_post_listing(
            layout,
            post_listing_template,
            post_item_template,
            posts,
            config,
        ),
    )
    .expect("Unable to write file");
}

pub fn render_post_listing(
    layout: &str,
    post_listing_template: &str,
    post_item_template: &str,
    posts: &Vec<Entry>,
    config: &Config,
) -> String {
    layout
        .replace("{{ page_title }}", &format!("{}", config.site_name))
        .replace(
            "{{ contents }}",
            &post_listing_template.replace(
                "{{ post_listing }}",
                &posts
                    .iter()
                    .map(|post| post.render(&post_item_template, &config))
                    .collect::<Vec<String>>()
                    .join("\n"),
            ),
        )
}

#[cfg(test)]
mod tests {
    use chrono::NaiveDate;
    use uuid::Uuid;

    use std::{env, fs, path};

    use super::*;

    #[test]
    fn test_render_post() {
        let config = Config {
            site_name: String::from("Test Site"),
        };

        let post = Entry {
            title: String::from("hello world"),
            body: String::from("lorem ipsum dolor sit amet"),
            slug: String::from("hello-world"),
            date: Some(NaiveDate::from_ymd(2019, 1, 1)),
            kind: EntryKind::Post,
        };

        let output = post.render(
            "<html><head><title>{{ page_title }}</title></head><body><article><h1>{{ title }}</h1><div>{{ body }}</div></article></body></html>", &config
        )
        .replace("\n", "");

        assert_eq!(
            "<html><head><title>hello world | Test Site</title></head><body><article><h1>hello world</h1><div><p>lorem ipsum dolor sit amet</p></div></article></body></html>",
            &output,
        );
    }

    #[test]
    fn test_render_post_listing() {
        let config = Config {
            site_name: String::from("Test Site"),
        };

        let posts = vec![
            Entry {
                title: String::from("First post"),
                body: String::from("lorem ipsum dolor sit amet"),
                slug: String::from("first-post"),
                date: Some(NaiveDate::from_ymd(2019, 1, 1)),
                kind: EntryKind::Post,
            },
            Entry {
                title: String::from("Second post"),
                body: String::from("lorem ipsum dolor sit amet"),
                slug: String::from("second-post"),
                date: Some(NaiveDate::from_ymd(2019, 1, 1)),
                kind: EntryKind::Post,
            },
            Entry {
                title: String::from("Third post"),
                body: String::from("lorem ipsum dolor sit amet"),
                slug: String::from("third-post"),
                date: Some(NaiveDate::from_ymd(2019, 1, 1)),
                kind: EntryKind::Post,
            },
        ];

        let output = render_post_listing(
            "<html><head><title>{{ page_title }}</title></head><body>{{ contents }}</body></html>",
            "<ul>{{ post_listing }}</ul>",
            "<li><a href=\"/{{ slug }}\">{{ title }}</a></li>",
            &posts,
            &config,
        )
        .replace("\n", "");

        assert_eq!(
            "<html><head><title>Test Site</title></head><body><ul><li><a href=\"/first-post\">First post</a></li><li><a href=\"/second-post\">Second post</a></li><li><a href=\"/third-post\">Third post</a></li></ul></body></html>",
            &output,
        );
    }

    #[test]
    fn test_write_entry() {
        let temp_dir = env::temp_dir();
        let project_dir = temp_dir.join(&Uuid::new_v4().to_string());
        fs::create_dir(&project_dir).unwrap();

        fs::create_dir(project_dir.join("public")).unwrap();
        fs::create_dir(project_dir.join("public").join("posts")).unwrap();

        let layout =
            "<html><head><title>{{ page_title }}</title></head><body>{{ contents }}</body></html>";
        let post_template = "<article><h1>{{ title }}</h1><div>{{ body }}</div></article>";
        let post = Entry {
            title: String::from("Hello world"),
            body: String::from("Lorem ipsum dolor sit amet"),
            slug: String::from("hello-world"),
            date: Some(NaiveDate::from_ymd(2019, 1, 1)),
            kind: EntryKind::Post,
        };
        let config = Config {
            site_name: "Test Site".to_string(),
        };

        write_entry(&project_dir, &layout, &post_template, &post, &config);

        let content = fs::read_to_string(
            project_dir
                .join("public")
                .join("posts")
                .join("hello-world")
                .join("index.html"),
        )
        .unwrap();

        assert_eq!(
            "<html><head><title>Hello world | Test Site</title></head><body><article><h1>Hello world</h1><div><p>Lorem ipsum dolor sit amet</p></div></article></body></html>",
	    content.replace("\n", "")
	);

        fs::remove_dir_all(temp_dir.join(&project_dir)).unwrap();
    }

    #[test]
    fn test_write_post_listing() {
        let temp_dir = env::temp_dir();
        let project_dir = temp_dir.join(&Uuid::new_v4().to_string());
        fs::create_dir(&project_dir).unwrap();
        env::set_current_dir(&project_dir).unwrap();

        let cwd = env::current_dir().unwrap();
        fs::create_dir(cwd.join("public")).unwrap();

        let layout =
            "<html><head><title>{{ page_title }}</title></head><body>{{ contents }}</body></html>";
        let post_listing_template = "<ul>{{ post_listing }}</ul>";
        let post_item_template = "<li><a href=\"/{{ slug }}\">{{ title }}</a></li>";
        let posts = vec![
            Entry {
                title: String::from("First post"),
                body: String::from("lorem ipsum dolor sit amet"),
                slug: String::from("first-post"),
                date: Some(NaiveDate::from_ymd(2019, 1, 1)),
                kind: EntryKind::Post,
            },
            Entry {
                title: String::from("Second post"),
                body: String::from("lorem ipsum dolor sit amet"),
                slug: String::from("second-post"),
                date: Some(NaiveDate::from_ymd(2019, 1, 1)),
                kind: EntryKind::Post,
            },
            Entry {
                title: String::from("Third post"),
                body: String::from("lorem ipsum dolor sit amet"),
                slug: String::from("third-post"),
                date: Some(NaiveDate::from_ymd(2019, 1, 1)),
                kind: EntryKind::Post,
            },
        ];
        let config = Config {
            site_name: "Test Site".to_string(),
        };
        write_entry_listing(
            &cwd,
            &layout,
            &post_listing_template,
            &post_item_template,
            &posts,
            &config,
        );

        assert_eq!(
            "<html><head><title>Test Site</title></head><body><ul><li><a href\
             =\"/first-post\">First post</a></li><li><a href=\"/second-post\">\
             Second post</a></li><li><a href=\"/third-post\">Third post</a></li\
             ></ul></body></html>",
            fs::read_to_string(&cwd.join("public").join("index.html"))
                .unwrap()
                .replace("\n", ""),
        );

        fs::remove_dir_all(temp_dir.join(&project_dir)).unwrap();
    }

    #[test]
    fn test_parse_post_entry() {
        let post = parse_entry(
            EntryKind::Post,
            "# Test Title | 2000-01-01\n\nThis is the body",
            path::PathBuf::from("posts/one.md").as_path(),
        );

        assert_eq!(post.kind, EntryKind::Post);
        assert_eq!(post.slug, "one");
        assert_eq!(post.title, "Test Title");
        assert_eq!(post.body, "This is the body");
        assert_eq!(post.date, Some(NaiveDate::from_ymd(2000, 1, 1)));
    }

    #[test]
    fn test_parse_page_entry() {
        let post = parse_entry(
            EntryKind::Page,
            "# Test Title\n\nThis is the body",
            path::PathBuf::from("pages/one.md").as_path(),
        );

        assert_eq!(post.kind, EntryKind::Page);
        assert_eq!(post.slug, "one");
        assert_eq!(post.title, "Test Title");
        assert_eq!(post.body, "This is the body");
        assert_eq!(post.date, None);
    }

    #[test]
    fn test_display_entry_date() {
        let post = Entry {
            kind: EntryKind::Post,
            title: String::from("Test Title"),
            slug: String::from("one"),
            body: String::from("This is the body"),
            date: Some(NaiveDate::from_ymd(2000, 1, 1)),
        };

        let config = Config {
            site_name: String::from("Test Site"),
        };

        assert_eq!("2000-01-01", post.render("{{ date }}", &config));
    }
}