add backlinks
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parent
9d8f308a4d
commit
7d097ebe72
2 changed files with 132 additions and 44 deletions
165
src/main.rs
165
src/main.rs
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@ -6,8 +6,8 @@ use chrono::{DateTime, Local};
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use clap::{App as ClapApp, Arg};
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use linkify::LinkFinder;
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use log::{info, trace};
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use percent_encoding::utf8_percent_encode;
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use pulldown_cmark::{html, Options, Parser};
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use percent_encoding::{percent_decode_str, utf8_percent_encode};
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use pulldown_cmark::{html, Event, Options, Parser, Tag};
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use regex::{Captures, Regex};
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use std::collections::HashMap;
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use std::fs::File;
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@ -33,7 +33,7 @@ struct MutableState {
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#[derive(Clone, Debug)]
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struct GardenCache {
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pages: HashMap<PathBuf, ParsedPage>,
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pages: HashMap<String, ParsedPage>,
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files: Vec<PathBuf>,
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}
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@ -167,20 +167,41 @@ async fn render(
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let full_path = data.garden_dir.join(path.as_str());
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// Redirect to ".md" version if requested path matches a .md file without the extension
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if !full_path.exists() && full_path.extension().is_none() {
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let md_path = format!("{}.md", path.to_string());
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if Path::new(&md_path).exists() {
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return Ok(HttpResponse::Found()
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.header(http::header::LOCATION, md_path)
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.finish());
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}
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if !full_path.exists()
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&& full_path.extension().is_none()
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&& Path::new(&format!("{}.md", full_path.to_str().unwrap())).exists()
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{
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return Ok(HttpResponse::Found()
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.header(http::header::LOCATION, format!("{}.md", path.to_string()))
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.finish());
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}
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if full_path.exists() && !path.ends_with(".md") {
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return Ok(NamedFile::open(full_path)?.into_response(&request)?);
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}
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let page = cache.pages.get(&full_path);
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let filename = full_path
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.components()
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.last()
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.unwrap()
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.as_os_str()
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.to_str()
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.unwrap();
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let normalized_name = normalize_name(filename);
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let mut backlinks: Vec<String> = vec![];
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for (path, page) in cache.pages.iter() {
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if page
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.links
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.iter()
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.any(|link| normalize_name(link.as_str()) == normalized_name)
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{
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backlinks.push(normalize_name(path));
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}
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}
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let page = cache.pages.get(path.as_ref());
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let mut context = Context::new();
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context.insert("version", VERSION);
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@ -193,14 +214,7 @@ async fn render(
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"page_title",
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&match page {
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Some(page) => page.title.clone(),
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None => full_path
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.components()
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.last()
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.unwrap()
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.as_os_str()
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.to_str()
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.unwrap()
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.to_string(),
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None => filename.to_string(),
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},
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);
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context.insert(
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@ -213,6 +227,7 @@ async fn render(
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.map_err(ErrorInternalServerError)?,
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},
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);
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context.insert("backlinks", &backlinks);
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context.insert(
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"mtime",
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&match page {
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@ -265,12 +280,12 @@ fn update_garden<P: AsRef<Path>>(
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let markdown_paths = files
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.iter()
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.filter(|p| p.to_str().unwrap_or("").ends_with(".md"))
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.map(|p| garden_path.join(p));
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.filter(|p| p.to_str().unwrap_or("").ends_with(".md"));
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for path in markdown_paths {
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trace!("Loading {} into cache...", path.display());
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let mtime = path.metadata().unwrap().modified().ok();
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if let Some(page) = pages.get(&path) {
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let full_path = garden_path.join(path);
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let mtime = full_path.metadata().unwrap().modified().ok();
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if let Some(page) = pages.get(path.to_str().unwrap()) {
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if let (Some(fs_time), Some(last_time)) = (mtime, page.timestamp) {
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if fs_time == last_time {
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continue;
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@ -278,34 +293,29 @@ fn update_garden<P: AsRef<Path>>(
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}
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}
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let mut file = File::open(&path)?;
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let mut file = File::open(&full_path)?;
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let mut file_string = String::new();
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file.read_to_string(&mut file_string)?;
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let markdown_source = preprocess_markdown(file_string);
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let parser = Parser::new_ext(markdown_source.as_str(), Options::all());
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let mut html_output = String::new();
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html::push_html(&mut html_output, parser);
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// TODO!
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let h1_regex = Regex::new(r"<h1>([^>]+)</h1>").unwrap();
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let title = match h1_regex.captures(&html_output) {
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Some(h1_match) => h1_match.get(1).unwrap().as_str(),
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_ => &path
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.components()
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.last()
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.unwrap()
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.as_os_str()
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.to_str()
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.unwrap_or("???"),
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};
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let result = GardenParser::parse(&markdown_source);
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pages.insert(
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path.clone(),
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String::from(path.to_str().unwrap()),
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ParsedPage {
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timestamp: mtime,
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html: html_output.clone(),
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title: String::from(title),
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links: vec![], // todo!,
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html: result.html,
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links: result.links,
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title: match result.title {
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Some(title) => title,
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_ => String::from(
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path.components()
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.last()
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.unwrap()
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.as_os_str()
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.to_str()
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.unwrap_or("???"),
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),
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},
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},
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);
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}
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@ -315,6 +325,67 @@ fn update_garden<P: AsRef<Path>>(
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Ok(result)
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}
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struct GardenParser<'a> {
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parser: Parser<'a>,
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last_nontext_event: Option<Event<'a>>,
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current_top_heading: u32,
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top_heading_text: &'a mut Option<String>,
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links: &'a mut Vec<String>,
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}
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struct ParseResult {
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html: String,
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title: Option<String>,
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links: Vec<String>,
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}
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impl<'a> GardenParser<'a> {
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fn parse<S: AsRef<str>>(text: &'a S) -> ParseResult {
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let mut title: Option<String> = None;
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let mut links: Vec<String> = vec![];
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let parser = GardenParser {
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parser: Parser::new_ext(text.as_ref(), Options::all()),
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last_nontext_event: None,
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current_top_heading: 999,
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top_heading_text: &mut title,
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links: &mut links,
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};
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let mut html = String::new();
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html::push_html(&mut html, parser);
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ParseResult { html, title, links }
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}
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}
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impl<'a> Iterator for GardenParser<'a> {
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type Item = Event<'a>;
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fn next(&mut self) -> Option<Self::Item> {
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let event = self.parser.next();
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if let Some(event) = &event {
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if let Event::Start(Tag::Link(_, str, _)) = &event {
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self.links.push(str.to_string());
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}
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if let Some(Event::Start(Tag::Heading(hl))) = self.last_nontext_event {
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if hl < self.current_top_heading {
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self.current_top_heading = hl;
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if let Event::Text(str) = &event {
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*self.top_heading_text = Some(str.clone().into_string());
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}
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}
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}
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self.last_nontext_event = Some(event.clone());
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}
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event
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}
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}
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fn preprocess_markdown(string: String) -> String {
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let double_brackets = Regex::new(r"\[\[(?P<inner>[\w .]+)\]\]").unwrap();
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let finder = LinkFinder::new();
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@ -351,3 +422,9 @@ fn preprocess_markdown(string: String) -> String {
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result_string
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}
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fn normalize_name(filename: &str) -> String {
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let decoded = percent_decode_str(filename).decode_utf8_lossy();
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let result = decoded.strip_suffix(".md");
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String::from(result.unwrap_or(filename))
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}
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@ -28,6 +28,17 @@
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<main>
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{{content | safe}}
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<hr>
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{% if backlinks %}
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<h1>Linked from:</h1>
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<ul>
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{% for link in backlinks %}
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<li><a href="/{{ link }}">{{link}}</a></li>
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{% endfor %}
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</ul>
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{% endif %}
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{% if mtime %}
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<footer>
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Last modified at {{mtime}}
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