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use serde_json::json;
use std::fs::{create_dir, read_to_string};
use std::path::PathBuf;
use tera::{Context, Tera};
use crate::assets::template_dir;
use crate::error::{Error, Raise};
use crate::project::{Chapter, Cover, Language, Project};
use crate::BookWriter;
pub struct Static {
base : PathBuf,
body_only : bool,
}
impl BookWriter for Static {
fn write_bytes(&mut self, dst : &PathBuf, input : &[u8]) -> Result<(), Error> {
std::fs::write(&self.base.join(dst), input)
.or_raise(&format!("Could not write content to file {:?}", dst))?;
Ok(())
}
fn write_file(&mut self, dst : &PathBuf, src : &PathBuf) -> Result<(), Error> {
let input =
read_to_string(src).or_raise(&format!("Could not read content of file {:?}", src))?;
self.write_bytes(dst, input.as_bytes())?;
Ok(())
}
}
impl Static {
pub fn init(base : &PathBuf, body_only : bool) -> Result<Static, Error> {
if !base.exists() {
create_dir(base).or_raise("Could not create output directory.")?;
}
if base.is_dir() {
Ok(Static {
base : base.to_owned(),
body_only : body_only,
})
} else {
Err(Error::new(&format!(
"{:?} already exists and is not a directory",
base
)))
}
}
fn generate_index(
&mut self,
project : &Project<Cover, String>,
tera : &Tera,
) -> Result<(), Error> {
let chaps : Vec<_> = project
.chapters
.iter()
.enumerate()
.map(|(idx, chapter)| {
json!({
"index": idx,
"title": chapter.title,
})
})
.collect();
let mut ctx = Context::new();
ctx.insert("chapters", &chaps);
ctx.insert("numbering", &project.numbering);
ctx.insert("language", &project.language);
ctx.insert("title", &project.title);
ctx.insert("body_only", &self.body_only);
ctx.insert("description", &project.description);
self.write_template(
&PathBuf::from("index.html"),
tera,
"static/index.html",
&ctx,
)?;
Ok(())
}
fn generate_chapters(
&mut self,
tera : &Tera,
chapters : &Vec<Chapter<String>>,
numbering : bool,
lang : &Language,
) -> Result<(), Error> {
let max = chapters.len();
chapters
.iter()
.enumerate()
.map(|(idx, c)| {
let mut ctx = Context::new();
ctx.insert("number", &(idx + 1));
ctx.insert("chapter", c);
ctx.insert("numbering", &numbering);
ctx.insert("language", lang);
ctx.insert("body_only", &self.body_only);
ctx.insert("chapters_number", &max);
let path : PathBuf = PathBuf::from(format!("{}.html", idx));
self.write_template(&path, tera, "static/chapter.html", &ctx)?;
Ok(())
})
.collect::<Result<Vec<()>, Error>>()?;
Ok(())
}
pub fn generate_static_website(
&mut self,
project : &Project<Cover, String>,
assets : &PathBuf,
) -> Result<(), Error> {
let tera =
Tera::new(template_dir(assets)?.as_str()).or_raise("Could not build templates")?;
self.generate_index(project, &tera)?;
self.generate_chapters(
&tera,
&project.chapters,
project.numbering.unwrap_or(false),
&project.language,
)?;
if !self.body_only {
self.write_file(
&PathBuf::from("style.css"),
&assets.join(PathBuf::from("templates/static/style.css")),
)?;
}
Ok(())
}
}
|