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use crate::directive::{Directive, Processed};
use crate::page::PageMeta;
use crate::site::Site;
use log::trace;
use std::collections::HashMap;
use std::path::Path;
#[derive(Debug, thiserror::Error)]
pub enum WikitextError {
#[error(transparent)]
Directive(#[from] crate::directive::DirectiveError),
#[error(transparent)]
Site(#[from] crate::site::SiteError),
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub enum Snippet {
Markdown(String),
WikiLink(WikiLink),
Directive(ParsedDirective),
}
impl Snippet {
pub fn prepare(&self, site: &mut Site) -> Result<(), WikitextError> {
trace!("prepare snippet {:?}", self);
if let Snippet::Directive(p) = self {
trace!("creating directive from parsed directive");
let e = Directive::try_from(p);
if let Ok(d) = e {
trace!("prepare directive {:?}", d);
d.prepare(site)?;
} else {
trace!("failed to create directive: {}", e.unwrap_err());
}
}
Ok(())
}
pub fn process(
&self,
site: &mut Site,
meta: &mut PageMeta,
) -> Result<Processed, WikitextError> {
trace!("Snippet::process: self={:?}", self);
let processed = match self {
Snippet::Markdown(text) => Processed::Markdown(text.into()),
Snippet::WikiLink(w) => {
let resolved = site.resolve(meta.path(), Path::new(w.target()))?;
trace!("resolved {} to {}", w.target(), resolved.display());
meta.add_link(&resolved);
let link = format!("[{}]({})", w.link_text(), resolved.display());
Processed::Markdown(link)
}
Snippet::Directive(p) => {
let e = Directive::try_from(p);
if let Ok(d) = e {
d.process(site, meta)?
} else if let Some(shortcut) = site.shortcut(p.name()) {
let arg = p.unnamed_args().first().unwrap().to_string();
let link = format!("[{}]({})", shortcut.desc(&arg), shortcut.url(&arg));
Processed::Markdown(link)
} else {
return Err(e.unwrap_err().into());
}
}
};
Ok(processed)
}
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct WikiLink {
link_text: String,
target: String,
}
impl WikiLink {
pub fn new(link_text: &str, target: &str) -> Self {
Self {
link_text: link_text.into(),
target: target.into(),
}
}
fn link_text(&self) -> &str {
&self.link_text
}
fn target(&self) -> &str {
&self.target
}
}
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct ParsedDirective {
name: String,
args: HashMap<String, String>,
}
impl ParsedDirective {
pub fn new(name: &str, args: HashMap<String, String>) -> Result<Self, WikitextError> {
trace!("ParsedDirective::new: name={:?} args={:?}", name, args);
Ok(Self {
name: name.into(),
args,
})
}
pub fn name(&self) -> &str {
&self.name
}
pub fn args(&self) -> HashMap<&str, &str> {
self.args
.iter()
.map(|(k, v)| (k.as_str(), v.as_str()))
.collect()
}
pub fn unnamed_args(&self) -> Vec<&str> {
self.args
.iter()
.filter_map(|(k, v)| if v.is_empty() { Some(k.as_str()) } else { None })
.collect()
}
}
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