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use std::fs;
use std::path::Path;
use std::str;
use errors;
use html::markdown::Markdown;
#[derive(Clone)]
pub struct ExternalHtml {
pub in_header: String,
pub before_content: String,
pub after_content: String
}
impl ExternalHtml {
pub fn load(in_header: &[String], before_content: &[String], after_content: &[String],
md_before_content: &[String], md_after_content: &[String], diag: &errors::Handler)
-> Option<ExternalHtml> {
load_external_files(in_header, diag)
.and_then(|ih|
load_external_files(before_content, diag)
.map(|bc| (ih, bc))
)
.and_then(|(ih, bc)|
load_external_files(md_before_content, diag)
.map(|m_bc| (ih, format!("{}{}", bc, Markdown(&m_bc, &[]))))
)
.and_then(|(ih, bc)|
load_external_files(after_content, diag)
.map(|ac| (ih, bc, ac))
)
.and_then(|(ih, bc, ac)|
load_external_files(md_after_content, diag)
.map(|m_ac| (ih, bc, format!("{}{}", ac, Markdown(&m_ac, &[]))))
)
.map(|(ih, bc, ac)|
ExternalHtml {
in_header: ih,
before_content: bc,
after_content: ac,
}
)
}
}
pub enum LoadStringError {
ReadFail,
BadUtf8,
}
pub fn load_string<P: AsRef<Path>>(file_path: P, diag: &errors::Handler)
-> Result<String, LoadStringError>
{
let file_path = file_path.as_ref();
let contents = match fs::read(file_path) {
Ok(bytes) => bytes,
Err(e) => {
diag.struct_err(&format!("error reading `{}`: {}", file_path.display(), e)).emit();
return Err(LoadStringError::ReadFail);
}
};
match str::from_utf8(&contents) {
Ok(s) => Ok(s.to_string()),
Err(_) => {
diag.struct_err(&format!("error reading `{}`: not UTF-8", file_path.display())).emit();
Err(LoadStringError::BadUtf8)
}
}
}
fn load_external_files(names: &[String], diag: &errors::Handler) -> Option<String> {
let mut out = String::new();
for name in names {
let s = match load_string(name, diag) {
Ok(s) => s,
Err(_) => return None,
};
out.push_str(&s);
out.push('\n');
}
Some(out)
}