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extern crate mdbook; extern crate regex; extern crate failure; use failure::Error; use mdbook::renderer::RenderContext; use mdbook::book::Chapter; use mdbook::BookItem; use regex::Regex; use serde::{Deserialize, Serialize}; use std::io::Write; use std::path::PathBuf; use std::fs::{File, create_dir_all}; #[derive(Serialize, Deserialize, Debug, Eq)] pub struct JSONChapter { pub path: String, pub title: String, pub subchapters: Vec<JSONChapter> } impl PartialEq for JSONChapter { fn eq(&self, other: &Self) -> bool { self.path == other.path && self.title == other.title && self.subchapters == other.subchapters } } #[derive(Serialize, Deserialize, Debug, Eq)] pub struct JSONBook { pub title: String, pub chapters: Vec<JSONChapter> } impl PartialEq for JSONBook { fn eq(&self, other: &Self) -> bool { self.title == other.title && self.chapters == other.chapters } } pub fn generate(context: &RenderContext) -> Result<(), Error> { generate_html_json(context)?; generate_markdown_contents(context) } fn generate_html_json(context: &RenderContext) -> Result<(), Error> { let filename_regex = Regex::new(r"md$")?; let chapters = context.book.sections.iter().filter_map(|item| { if let BookItem::Chapter(ref chapter) = *item { Some(parse_chapter(chapter, &filename_regex)) } else { None } }).collect::<Vec<JSONChapter>>(); let title = &context.config.book.title.to_owned().unwrap_or(String::from("")); write_book(title.to_string(), chapters, &context.destination, "book.json")?; Ok(()) } fn write_book(title: String, chapters: Vec<JSONChapter>, path: &PathBuf, filename: &str) -> Result<(), Error> { let mut book_api = File::create(path.join(filename))?; let book = JSONBook { title, chapters, }; let content = serde_json::to_string(&book)?; writeln!(book_api, "{}", content)?; Ok(()) } fn parse_chapter(chapter: &Chapter, filename_regex: &Regex) -> JSONChapter { let chapter_path = chapter.path.to_str().expect("Chapter path not valid"); let path = String::from("/") + &filename_regex.replace_all(chapter_path, "html"); JSONChapter { path, title: chapter.name.clone(), subchapters: chapter.sub_items.iter().filter_map(|item| { if let BookItem::Chapter(ref chapter) = *item { Some(parse_chapter(chapter, filename_regex)) } else { None } }).collect() } } fn generate_markdown_contents(context: &RenderContext) -> Result<(), Error> { let chapters = context.book.sections.iter().filter_map(|item| { if let BookItem::Chapter(ref chapter) = *item { Some(copy_chapter(chapter, &context.destination)) } else { None } }).collect::<Vec<JSONChapter>>(); let title = &context.config.book.title.to_owned().unwrap_or(String::from("")); write_book(title.to_string(), chapters, &context.destination, "markdown.json")?; Ok(()) } fn copy_chapter(chapter: &Chapter, prefix: &PathBuf) -> JSONChapter { let chapter_path = chapter.path.to_str().expect("Chapter path not valid"); let path = String::from("/api/markdown/") + chapter_path; let file_path = prefix.join("markdown").join(chapter_path); let parent_directory = file_path.parent().expect(""); create_dir_all(parent_directory).expect("Unable to create parent directory"); let mut chapter_file = File::create(&file_path).expect(&format!("Unable to create chapter file at {}", file_path.to_str().expect(""))); writeln!(chapter_file, "{}", chapter.content).expect("Unable to write chapter contents"); JSONChapter { path, title: chapter.name.clone(), subchapters: chapter.sub_items.iter().filter_map(|item| { if let BookItem::Chapter(ref chapter) = *item { Some(copy_chapter(chapter, prefix)) } else { None } }).collect() } }