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use std::{collections::HashMap, slice::Iter};
use envl_utils::{
error::{EnvlError, ErrorContext},
types::Position,
variable::{Type, Value as ConfigValue},
};
use crate::{
misc::token::{Token, Value},
parser::{
value::parse_value,
var::{array::parse_array, parse_struct::parse_struct},
Parser,
},
};
#[derive(Debug, Clone)]
pub(crate) enum ParsedValue {
Array(Vec<ParsedValue>),
Struct(HashMap<String, ParsedValue>),
Value(String),
Null,
}
pub(crate) fn parse_parsed_value(
v: ParsedValue,
t: Type,
position: Position,
) -> Result<ConfigValue, EnvlError> {
match v {
ParsedValue::Null => Ok(ConfigValue::Null),
ParsedValue::Value(value) => match parse_value(t, value) {
Ok(result) => Ok(result),
Err(err) => Err(EnvlError {
message: err,
position,
}),
},
ParsedValue::Struct(values) => match t {
Type::Struct(t) => {
let mut elements = HashMap::new();
for (name, value) in values {
if let Some(value_type) = t.get(&name) {
match parse_parsed_value(value, value_type.clone(), position.clone()) {
Ok(result) => {
if elements.contains_key(&name) {
return Err(EnvlError {
message: ErrorContext::InvalidElements,
position,
});
}
elements.insert(name.clone(), result);
}
Err(err) => {
return Err(err);
}
}
} else {
return Err(EnvlError {
message: ErrorContext::InvalidType,
position,
});
}
}
Ok(ConfigValue::Struct(elements))
}
_ => Err(EnvlError {
message: ErrorContext::InvalidType,
position,
}),
},
ParsedValue::Array(values) => match t {
Type::Array(boxed_type) => {
let t = *boxed_type;
let mut elements = Vec::new();
for value in values {
match parse_parsed_value(value, t.to_owned(), position.to_owned()) {
Ok(element) => {
elements.push(element);
}
Err(err) => {
return Err(err);
}
}
}
Ok(ConfigValue::Array(elements))
}
_ => Err(EnvlError {
message: ErrorContext::InvalidType,
position,
}),
},
}
}
impl Parser {
pub fn parse_option_value<'a>(
&self,
tokens: &mut Iter<'a, Token>,
) -> Result<(ParsedValue, ParsedValue), EnvlError> {
let mut block_closed = false;
let mut comma_used = false;
let mut colon_used = false;
let mut element_name = None;
let mut last_position = None;
let mut inserted_count = 0;
let mut default_value = ParsedValue::Null;
let mut actions_value = ParsedValue::Null;
let mut parser_error = None;
'parse_loop: loop {
if let Some(token) = tokens.next() {
macro_rules! error {
($msg: expr) => {
parser_error = Some(EnvlError {
message: $msg,
position: token.position.clone(),
});
break 'parse_loop;
};
}
macro_rules! insert {
($value: expr) => {
if !colon_used {
error!(ErrorContext::Required("Colon".to_string()));
}
if !comma_used && inserted_count != 0 {
error!(ErrorContext::Required("Comma".to_string()));
} else {
comma_used = false;
}
match &element_name {
Some(v) if v == "default" => {
default_value = $value;
}
Some(v) if v == "actions" => {
actions_value = $value;
}
_ => {
error!(ErrorContext::InvalidSyntaxInBlock(
"option value".to_string()
));
}
}
element_name = None;
inserted_count += 1;
colon_used = false;
};
}
last_position = Some(token.position.to_owned());
match &token.value {
Value::LeftParentheses => {
error!(ErrorContext::InvalidPosition("(".to_string()));
}
Value::RightParentheses => {
block_closed = true;
break 'parse_loop;
}
Value::Colon => {
if colon_used || element_name.is_none() {
error!(ErrorContext::InvalidPosition("Colon".to_string()));
}
colon_used = true;
}
Value::Comma => {
if comma_used || element_name.is_some() {
error!(ErrorContext::InvalidPosition("Comma".to_string()));
}
comma_used = true;
}
Value::Ident(v) => {
if element_name.is_some() {
insert!(ParsedValue::Value(v.clone()));
} else {
element_name = Some(v.to_owned());
}
}
Value::Null => {
if element_name.is_some() {
insert!(ParsedValue::Null);
} else {
error!(ErrorContext::Required("Element name".to_string()));
}
}
Value::Struct => match parse_struct(tokens) {
Ok(v) => {
insert!(v);
}
Err(err) => {
parser_error = Some(err);
break 'parse_loop;
}
},
Value::LeftSquareBracket => match parse_array(tokens) {
Ok(v) => {
insert!(v);
}
Err(err) => {
parser_error = Some(err);
break 'parse_loop;
}
},
_ => {
error!(ErrorContext::InvalidSyntaxInBlock(
"option value".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("option".to_string()),
position,
});
}
}
Ok((default_value, actions_value))
}
}
}