use anyhow::Result;
use super::modifier::Modifier;
use super::modifier::ModifierKey;
use super::modifier::invert;
use crate::models::context::ContextModel;
pub struct EqualsModifier;
impl Modifier for EqualsModifier {
fn key(&self) -> ModifierKey {
ModifierKey::Equals
}
fn apply(&self, value: &ContextModel, arg: &str) -> Result<ContextModel> {
let (pattern, invert_flag) = if let Some(p) = arg.strip_suffix(":not") {
(p, true)
} else {
(arg, false)
};
let result = match value {
ContextModel::String(s) => ContextModel::String((s == pattern).to_string()),
ContextModel::List(items) => {
let results: Vec<String> =
items.iter().map(|i| (i == pattern).to_string()).collect();
ContextModel::List(results)
}
};
if invert_flag {
Ok(invert(result))
} else {
Ok(result)
}
}
}