1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

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()
    }
}