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use std::cell::RefCell;
mod parser;
#[derive(Debug)]
pub struct Config<'a> {
contents: RefCell<Vec<&'a str>>,
}
impl<'a> Config<'a> {
pub fn load(contents: Vec<&'a str>) -> Config {
Config {
contents: RefCell::new(contents),
}
}
pub fn get_config(&self) -> String {
self.contents
.borrow()
.iter()
.map(|c| c.to_string())
.collect::<Vec<String>>()
.join("\n")
}
pub fn list_contexts(&self) -> String {
self.get_contexts()
.unwrap()
.iter()
.map(|c| c.to_string())
.collect::<Vec<String>>()
.join("\n")
}
pub fn check_context(&self, context: &str) -> bool {
let contexts = self
.get_contexts()
.unwrap();
contexts.iter().find(|&c| *c == context).is_some()
}
pub fn get_current_context(&self) -> Result<&str, &'static str> {
let contents = self.contents.borrow();
let mut iter = contents.iter();
while let Some(line) = iter.next() {
if let Some(current_context) = parser::match_literal(line, "current-context: ") {
return Ok(current_context);
}
}
Err("current-context is not set")
}
pub fn set_current_context(&'a self, new_context: &'a str) -> Result<(), &'static str> {
let mut index = 0;
let mut contents = self.contents.borrow_mut();
let mut iter = contents.iter();
while let Some(line) = iter.next() {
if parser::match_literal(line, "current-context:").is_some() {
contents.push(new_context);
contents.swap_remove(index);
return Ok(());
}
index = index + 1;
}
contents.push(new_context);
Ok(())
}
pub fn unset_current_context(&'a self) -> Result<(), &'static str> {
let mut index = 0;
let mut contents = self.contents.borrow_mut();
let mut iter = contents.iter();
while let Some(line) = iter.next() {
if parser::match_literal(line, "current-context:").is_some() {
contents.remove(index);
return Ok(());
}
index = index + 1;
}
Ok(())
}
fn get_contexts(&self) -> Result<Vec<&str>, &'static str> {
let mut contexts = Vec::<&str>::new();
let contents = self.contents.borrow();
let mut input = contents.iter().peekable();
while let Some(line) = input.next() {
if parser::match_literal(line, "contexts:").is_some() {
while parser::is_in_mapping(input.peek().unwrap()).is_ok() {
if let Some(line) = input.next() {
if let Some(name) = parser::match_literal(line, " name: ") {
contexts.push(name);
}
}
}
break;
}
}
if contexts.len() == 0 {
return Err("Cannot get contexts!");
}
Ok(contexts)
}
}