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use std::collections::BTreeMap;
use std::str::FromStr;
use crate::lz_err::LzErr;
use crate::get::Getable;
#[derive(PartialEq,PartialOrd,Debug,Clone)]
pub struct Lz {
pub name:String,
pub deets:BTreeMap<String,String>,
}
impl Lz{
pub fn new(s:&str)->Self{
let mut sp = s.split(|x|(x==':')||(x==','));
let name = sp.next().expect("Split always has 1 result").to_string();
let mut deets = BTreeMap::new();
for (k,p) in sp.enumerate(){
deets.insert(format!("ext{}",k),p.to_string());
}
Lz{name,deets}
}
pub fn add_deet_str(&mut self,s:&str)->Result<(),LzErr>{
let i = s.find(':').ok_or(LzErr::NotFound)?;
let (k,v) = s.split_at(i);
let v = &v[1..];
self.add_deet(k,v);
Ok(())
}
pub fn add_deet(&mut self,k:&str,v:&str){
self.deets.insert(k.trim().to_string(),v.trim().to_string());
}
}
pub struct LzList {
pub items:Vec<Lz>,
}
impl FromStr for LzList{
type Err = LzErr;
fn from_str(s:&str)->Result<Self,LzErr>{
let sp = s.split(|x|(x == '\n') || (x=='\r'));
let mut curr:Option<Lz> = None;
let mut items = Vec::new();
for (i,l) in sp.enumerate() {
let tabbed = match l.chars().next(){
Some('#')|None=>continue,
Some(c)=>c.is_whitespace(),
};
if tabbed{
let l= l.trim_left();
match l.chars().next(){
Some('#')|None =>continue,
_=>{},
}
match curr{
Some(ref mut curr)=>curr.add_deet_str(l).map_err(|_|LzErr::ParseErrAt(i))?,
None=>return Err(LzErr::ParseErrAt(i)),
}
continue;
}
if let Some(curr) = curr{
items.push(curr);
}
curr = Some(Lz::new(l));
}
if let Some(c) = curr {
items.push(c);
}
Ok(LzList{items})
}
}
impl Getable for Lz{
fn get(&self,s:&str)->Option<String>{
self.deets.get(s).map(|s|s.to_string())
}
}
impl Getable for LzList{
fn get(&self,s:&str)->Option<String>{
let sp:Vec<&str> = s.split(".").collect();
match sp.len(){
0=>return None,
1=>self.items.get(0)?.get(sp[0]),
_=>{
for i in &self.items{
if i.name == sp[0]{
return i.get(sp[1]);
}
}
None
},
}
}
}
#[cfg(test)]
mod test{
use super::*;
#[test]
fn make_lz(){
let mut dave = Lz::new("dave,3,4");
assert_eq!(dave.name,"dave");
assert_eq!(dave.deets.get("ext0").unwrap(),"3");
assert_eq!(dave.deets.get("ext1").unwrap(),"4");
dave.add_deet_str(" fir : plop ").unwrap();
assert_eq!(dave.deets.get("fir").unwrap(),"plop");
assert!(dave.add_deet_str("fire").is_err());
dave.add_deet_str(" flur:").unwrap();
assert_eq!(dave.deets.get("flur").unwrap(),"");
}
#[test]
fn make_lzlist(){
let s = "\
superman:2
power:fly
batman:5
#
#poop
power:money
";
let lz = LzList::from_str(s).unwrap();
assert_eq!(lz.items.len(),2);
}
}