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use std::slice::Iter;
use envl_utils::{
error::{EnvlError, ErrorContext},
types::Position,
};
use crate::{
misc::{
config::{Setting, Settings},
token::{Token, Value},
},
parser::Parser,
};
impl Parser {
fn parse_string(&self, value: &str, position: &Position) -> Result<String, EnvlError> {
if value.starts_with('"') && value.ends_with('"') {
let mut str_value = value.to_owned();
str_value.remove(value.len() - 1);
str_value.remove(0);
Ok(str_value)
} else {
Err(EnvlError {
message: ErrorContext::InvalidType,
position: position.clone(),
})
}
}
pub(super) fn parse_settings<'a>(
&self,
tokens: &mut Iter<'a, Token>,
) -> Result<Settings, EnvlError> {
let mut in_block = false;
let mut block_closed = false;
let mut equal_used = false;
let mut last_position = None;
let mut target_prop = None;
let mut target_value = None;
let mut parser_error = None;
let mut settings = Settings {
envl_file_path: None,
};
'parse_loop: loop {
if let Some(token) = tokens.next() {
macro_rules! error {
($msg: expr) => {
parser_error = Some(EnvlError {
message: $msg,
position: token.position.clone(),
});
break 'parse_loop;
};
}
last_position = Some(token.position.clone());
match &token.value {
Value::LeftCurlyBracket => {
if in_block {
error!(ErrorContext::InvalidPosition("{".to_string()));
}
in_block = true;
continue;
}
Value::RightCurlyBracket => {
block_closed = true;
break 'parse_loop;
}
_ => {}
}
if !in_block {
error!(ErrorContext::MustInBlock("vars".to_string()));
}
match &token.value {
Value::Equal => {
if equal_used || target_prop.is_none() {
error!(ErrorContext::InvalidPosition("Equal".to_string()));
}
equal_used = true;
}
Value::Semi => {
if let (Some(prop), Some(value)) = (target_prop, target_value) {
if !equal_used {
error!(ErrorContext::Required("Equal".to_string()));
}
match prop {
"envl_file_path" => match self.parse_string(value, &token.position)
{
Ok(value) => {
settings.envl_file_path = Some(Setting {
value,
position: token.position.clone(),
});
}
Err(err) => {
parser_error = Some(err);
break 'parse_loop;
}
},
_ => {
error!(ErrorContext::InvalidProperty("settings".to_string()));
}
}
}
}
Value::Ident(v) => {
if target_prop.is_some() {
target_value = Some(v);
} else {
target_prop = Some(v);
}
}
_ => {
error!(ErrorContext::InvalidSyntaxInBlock("settings".to_string()));
}
}
} else {
break 'parse_loop;
}
}
if let Some(err) = parser_error {
Err(err)
} else {
if let Some(position) = last_position {
if !block_closed {
return Err(EnvlError {
message: ErrorContext::IsntClosed("Settings".to_string()),
position,
});
}
}
Ok(settings)
}
}
}