rewrite most of the handler code :3

src/handlers/fetch.rs

@@ -0,0 +1,63 @@
+use std::borrow::Cow;
+
+use indicatif::ProgressBar;
+use owo_colors::OwoColorize;
+
+use crate::{action::Action, handlers::Handler, nix_path, pad_string};
+
+pub struct FetchHandler {
+    id: u64,
+    bar: ProgressBar,
+    path: String,
+    source: String,
+}
+
+impl FetchHandler {
+    pub fn new<'a>(
+        id: u64,
+        width: u16,
+        path: Cow<'a, str>,
+        source: Cow<'a, str>,
+        bar: ProgressBar,
+    ) -> Self {
+        bar.enable_steady_tick(std::time::Duration::from_millis(100));
+        let new = Self {
+            id,
+            bar,
+            path: path.to_string(),
+            source: source.to_string(),
+        };
+        new.format(width);
+        new
+    }
+    fn format(&self, width: u16) {
+        let name = nix_path::extract_package_name_string(&self.path)
+            .expect("Failed to extract package name");
+        let chunk = (width - 15) / 2;
+        let name = pad_string(&name, chunk as usize);
+        let source = pad_string(&self.source, chunk as usize);
+        let name = format!("Querying {}", name.green().bold());
+        self.bar
+            .set_message(format!("{} on {}", name, source.yellow()));
+    }
+}
+
+impl Handler for FetchHandler {
+    fn handle(
+        &mut self,
+        _state: &mut crate::state::State,
+        action: &crate::action::Action,
+    ) -> color_eyre::Result<bool> {
+        match action {
+            &Action::Stop { id, .. } if *id == self.id => {
+                self.bar.finish_and_clear();
+                Ok(false)
+            }
+            _ => Ok(true),
+        }
+    }
+    fn on_resize(&mut self, state: &mut crate::state::State) -> color_eyre::Result<()> {
+        self.format(state.term_width);
+        Ok(())
+    }
+}