use anyhow::Result;
use super::modifier::Modifier;
use super::modifier::ModifierKey;
use crate::models::context::ContextModel;
pub struct TrimModifier;
impl Modifier for TrimModifier {
fn key(&self) -> ModifierKey {
ModifierKey::Trim
}
fn apply(&self, value: &ContextModel, arg: &str) -> Result<ContextModel> {
let chars: Vec<char> = arg.chars().collect();
match value {
ContextModel::String(s) => {
let trimmed = s
.trim_matches(|c: char| c.is_whitespace() || chars.contains(&c))
.to_string();
if !arg.is_empty() && trimmed == arg {
Ok(ContextModel::String(String::new()))
} else {
Ok(ContextModel::String(trimmed))
}
}
ContextModel::List(items) => {
let filtered: Vec<String> = items
.iter()
.filter_map(|i| {
let trimmed = i
.trim_matches(|c: char| c.is_whitespace() || chars.contains(&c))
.to_string();
if arg.is_empty() && trimmed.is_empty() {
None
} else if !arg.is_empty() && trimmed == arg {
None
} else {
Some(trimmed)
}
})
.collect();
Ok(ContextModel::List(filtered))
}
}
}
}