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use std::collections::BTreeMap;
use std::collections::BTreeSet;
use std::collections::btree_map;
use super::*;
use codeviz_common::ElementFormatter;
#[derive(Debug, Clone)]
pub struct FileSpec {
pub elements: Elements,
}
impl FileSpec {
pub fn new() -> FileSpec {
FileSpec { elements: Elements::new() }
}
pub fn push<E>(&mut self, element: E)
where E: Into<Element>
{
self.elements.push(element);
}
fn module_to_path(&self, path: &str) -> String {
let parts: Vec<&str> = path.split(".").collect();
format!("{}.js", parts.join("/"))
}
fn imports(&self) -> Option<Elements> {
let mut imports = BTreeSet::new();
self.elements.imports(&mut imports);
let mut collected: BTreeMap<String, Vec<String>> = BTreeMap::new();
let mut wildcard: BTreeSet<(String, String)> = BTreeSet::new();
for import in imports {
if let Some(alias) = import.alias {
wildcard.insert((import.module, alias));
} else {
match collected.entry(import.module.clone()) {
btree_map::Entry::Vacant(entry) => {
entry.insert(vec![import.name.clone()]);
}
btree_map::Entry::Occupied(entry) => {
entry.into_mut().push(import.name.clone());
}
}
}
}
if collected.is_empty() && wildcard.is_empty() {
return None;
}
let mut out = Elements::new();
for (module, names) in collected {
let mut stmt = Statement::new();
stmt.push("import ");
stmt.push("{");
stmt.push(names.join(", "));
stmt.push("}");
stmt.push(" from ");
stmt.push(Variable::String(self.module_to_path(&module)));
stmt.push(";");
out.push(stmt);
}
for (module, alias) in wildcard {
let mut stmt = Statement::new();
stmt.push("import * as ");
stmt.push(alias);
stmt.push(" from ");
stmt.push(Variable::String(self.module_to_path(&module)));
stmt.push(";");
out.push(stmt);
}
Some(out)
}
pub fn format<W>(&self, out: &mut W) -> Result<()>
where W: ::std::fmt::Write
{
let mut elements = Elements::new();
if let Some(imports) = self.imports() {
elements.push(imports);
}
elements.push(self.elements.clone().join(Spacing));
let elements: Element = elements.join(Spacing).into();
let mut extra = ();
elements.format(&mut ElementFormatter::new(out), &mut extra)?;
out.write_char('\n')?;
Ok(())
}
}
impl ImportReceiver for BTreeSet<ImportedName> {
fn receive(&mut self, name: &ImportedName) {
self.insert(name.clone());
}
}
impl ToString for FileSpec {
fn to_string(&self) -> String {
let mut s = String::new();
self.format(&mut s).unwrap();
s
}
}