1 files changed, 80 insertions, 0 deletions
diff --git a/src/resources.rs b/src/resources.rs
new file mode 100644
index 0000000..c145960
--- /dev/null
+++ b/src/resources.rs
@@ -0,0 +1,80 @@
+use std::{
+    fs,
+    path::{Path, PathBuf},
+};
+
+use anyhow::{Context, Result};
+use bevy::prelude::*;
+
+use crate::events::DirworldNavigationEvent;
+
+/// Configuration for Dirworld.
+#[derive(Resource)]
+pub struct DirworldConfig {
+    root: PathBuf,
+}
+
+impl DirworldConfig {
+    /// Construct a new dirworld config with the given root path. Will panic if the provided path
+    /// cannot be canonicalized.
+    // TODO: Don't panic? lol
+    pub fn new(root: PathBuf) -> Self {
+        Self {
+            root: fs::canonicalize(root).expect("Failed to canonicalize path!"),
+        }
+    }
+
+    ///
+    pub fn root(&self) -> &PathBuf {
+        &self.root
+    }
+}
+
+/// Contains the dirworld state.
+#[derive(Resource)]
+pub struct Dirworld {
+    /// Current active directory.
+    pub path: PathBuf,
+
+    /// Entities local to the current room.
+    pub tracked_entities: Vec<Entity>,
+}
+
+impl FromWorld for Dirworld {
+    fn from_world(world: &mut World) -> Self {
+        let config = world.remove_resource::<DirworldConfig>().unwrap();
+        world.send_event(DirworldNavigationEvent::EnteredRoom {
+            path: config.root().clone(),
+        });
+        let result = Self {
+            path: config.root().clone(),
+            tracked_entities: vec![],
+        };
+        world.insert_resource(config);
+        result
+    }
+}
+
+impl Dirworld {
+    /// Move into a new room.
+    // TODO: Clear tracked entities?
+    // TODO: Make into command extension trait?
+    pub fn navigate_to(
+        &mut self,
+        path: PathBuf,
+        event_writer: &mut EventWriter<DirworldNavigationEvent>,
+    ) -> Result<()> {
+        event_writer.send(DirworldNavigationEvent::LeftRoom {
+            path: self.path.clone(),
+        });
+        self.path = Path::new(&self.path)
+            .join(path)
+            .to_str()
+            .context("Path not valid UTF-8")?
+            .into();
+        event_writer.send(DirworldNavigationEvent::EnteredRoom {
+            path: self.path.clone(),
+        });
+        Ok(())
+    }
+}