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|
use std::{fmt::Display, fs, path::Path};
use anyhow::{Context, Result};
use crate::{
config_file::Config,
file_tree::{FileTree, GeneratedFile},
};
use super::{replacement::untemplatize_chapter, MangledName};
pub struct ChapterName {
name: MangledName,
number: u32,
}
impl Display for ChapterName {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.write_fmt(format_args!("{:02}_{}", self.number, self.name))
}
}
impl ChapterName {
pub fn from_str(name: &str, last_chapter_number: u32) -> Self {
let name = MangledName::new(name);
Self {
name,
number: last_chapter_number + 1,
}
}
pub fn new(name: MangledName, last_chapter_number: u32) -> Self {
Self {
name,
number: last_chapter_number + 1,
}
}
pub fn to_components(self) -> (MangledName, u32) {
(self.name, self.number)
}
fn from_components(name: MangledName, number: u32) -> Self {
Self { name, number }
}
}
pub fn generate_new_chapter(
config: Config,
project_root: &Path,
name: String,
) -> anyhow::Result<FileTree> {
let mut file_tree = FileTree::new();
let (last_chapter_name, last_chapter_number) = get_last_chapter_name(project_root)
.context("Failed to get information on last chapter")?
.unwrap_or(ChapterName {
name: MangledName::from_str_unsafe("static"),
number: 0,
})
.to_components();
file_tree.add_file(new_main_file(
project_root,
&config,
&name,
last_chapter_number,
last_chapter_name,
)?);
file_tree.add_file(new_chapter_file(
&config,
&name,
project_root,
last_chapter_number,
));
Ok(file_tree)
}
fn get_last_chapter_name(project_root: &Path) -> anyhow::Result<Option<ChapterName>> {
let chapter_dirs = project_root.join("content");
let mut chapter_names = fs::read_dir(chapter_dirs)?
.filter_map(|path| -> Option<Result<String>> {
let path = match path.context("Failed to read a path") {
Ok(ok) => ok,
Err(err) => return Some(Err(err)),
};
let os_file_name = path.file_name();
let file_name = os_file_name
.to_str()
.expect("All chapter should be converted to ascii");
if file_name == "static" {
None
} else {
Some(Ok(file_name.to_owned()))
}
})
.collect::<Result<Vec<String>>>()?;
// There are no chapters, besides the default `static` one, which was sorted out
if chapter_names.is_empty() {
return Ok(None);
}
// The names are prefixed with a number
chapter_names.sort();
let raw_components = chapter_names[chapter_names.len() - 1]
.split_once('_')
.expect("Exits");
let number: u32 = raw_components.0.parse().expect("Will be a number");
// The name is already mangled
assert!(
MangledName::check_mangled(raw_components.1),
"'{}' is not yet mangled?! It should be: '{}'",
raw_components.1,
MangledName::new(raw_components.1)
);
let name: MangledName = MangledName::from_str_unsafe(raw_components.1);
Ok(Some(ChapterName::from_components(name, number)))
}
fn new_chapter_file(
config: &Config,
name: &str,
project_root: &Path,
last_chapter_number: u32,
) -> GeneratedFile {
let chapter_text = untemplatize_chapter(&config.templates.chapter, &name);
GeneratedFile::new(
project_root
.join("content")
.join(ChapterName::from_str(name, last_chapter_number).to_string())
.join("chapter.tex"),
chapter_text,
)
}
fn new_main_file(
project_root: &Path,
config: &Config,
name: &str,
last_chapter_number: u32,
last_chapter_name: MangledName,
) -> anyhow::Result<GeneratedFile> {
let main_path = project_root.join(&config.main_file);
let mut main_text = fs::read_to_string(&main_path)?;
let chapter_includeonly: String = format!(
"\\includeonly{{content/{}/{}}}",
ChapterName::from_str(name, last_chapter_number).to_string(),
"chapter.tex",
);
if &last_chapter_name.as_str() == &"static" && last_chapter_number == 0 {
// This is the first added chapter; The `\includeonly` will be empty.
main_text = main_text.replace("\\includeonly{}", &chapter_includeonly)
} else {
main_text = main_text.replace(
&format!(
"\\includeonly{{content/{}/{}}}",
ChapterName::new(last_chapter_name, last_chapter_number - 1).to_string(),
"chapter.tex",
),
&chapter_includeonly,
)
};
let find_index = main_text
.find("% NEXT_CHAPTER")
.expect("The % NEXT_CHAPTER maker must exist");
main_text.insert_str(
find_index,
&format!(
"\\include{{content/{}/{}}}\n ",
ChapterName::from_str(name, last_chapter_number).to_string(),
"chapter.tex",
),
);
Ok(GeneratedFile::new(main_path, main_text))
}
|
