feat: phase 2

Newfound motivation

rust/src/appdata.rs

@@ -0,0 +1,33 @@
+use anyhow::{anyhow, Result};
+use crate::pkg::PkgKey;
+use crate::Profile;
+use crate::pkg_store::PackageStore;
+
+pub struct AppData {
+    pub profile: Option<Profile>,
+    pub pkgs: PackageStore,
+}
+
+impl AppData {
+    pub fn toggle_package(&mut self, key: PkgKey, enable: bool) -> Result<()> {
+        log::debug!("toggle: {} {}", key, enable);
+
+        let profile = self.profile.as_mut()
+            .ok_or_else(|| anyhow!("No profile"))?;
+
+        if enable {
+            let pkg = self.pkgs.get(key.clone())?;
+            let loc = pkg.loc
+                .clone()
+                .ok_or_else(|| anyhow!("Attempted to enable a non-existent package"))?;
+            profile.mods.insert(key);
+            for d in &loc.dependencies {
+                self.toggle_package(d.clone(), true)?;
+            }
+        } else {
+            profile.mods.remove(&key);
+        }
+
+        Ok(())
+    }
+}