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use crate::filters::network::NetworkFilter;
use itertools::Either;
use serde::{Serialize, Deserialize};
use itertools::Itertools;
#[derive(Debug, PartialEq)]
pub enum FilterType {
Network,
Cosmetic,
NotSupported,
}
#[derive(Debug, PartialEq)]
pub enum FilterError {
NotSupported,
NotImplemented,
Empty,
ParseError,
}
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct FilterList {
pub uuid: String,
pub url: String,
pub title: String,
pub langs: Vec<String>,
pub support_url: String,
pub component_id: String,
pub base64_public_key: String,
}
pub fn parse_filters(
list: &[String],
load_network_filters: bool,
load_cosmetic_filters: bool,
debug: bool,
) -> (Vec<NetworkFilter>, Vec<String>) {
let list_iter = list.into_iter();
let (network_filters, cosmetic_filters): (Vec<_>, Vec<_>) = list_iter
.map(|line| {
let filter = line.trim();
if !filter.is_empty() {
let filter_type = detect_filter_type(filter);
if filter_type == FilterType::Network && load_network_filters {
let network_filter = NetworkFilter::parse(filter, debug);
network_filter
.map(Either::Left)
.or_else(|_| Err(FilterError::ParseError))
} else if filter_type == FilterType::Cosmetic && load_cosmetic_filters {
Ok(Either::Right(String::from(filter)))
} else {
Err(FilterError::NotSupported)
}
} else {
Err(FilterError::Empty)
}
})
.filter_map(Result::ok)
.partition_map(|filter| match filter {
Either::Left(f) => Either::Left(f),
Either::Right(f) => Either::Right(f),
});
(network_filters, cosmetic_filters)
}
fn detect_filter_type(filter: &str) -> FilterType {
if filter.len() == 1
|| filter.starts_with('!')
|| (filter.starts_with('#') && filter[1..].starts_with(char::is_whitespace))
|| filter.starts_with("[Adblock")
{
return FilterType::NotSupported;
}
if filter.starts_with('|') || filter.starts_with("@@|") {
return FilterType::Network;
}
if filter.find("$$").is_some() {
return FilterType::NotSupported;
}
if let Some(sharp_index) = filter.find('#') {
let after_sharp_index = sharp_index + 1;
if filter[after_sharp_index..].starts_with( "@$#")
|| filter[after_sharp_index..].starts_with( "@%#")
|| filter[after_sharp_index..].starts_with( "%#")
|| filter[after_sharp_index..].starts_with( "$#")
|| filter[after_sharp_index..].starts_with( "?#")
{
return FilterType::NotSupported;
} else if filter[after_sharp_index..].starts_with( '#')
|| filter[after_sharp_index..].starts_with( "@#")
{
return FilterType::Cosmetic;
}
}
FilterType::Network
}