Most of the refactor. Need to switch machines.

crates/core/src/dependency.rs

@@ -0,0 +1,43 @@
+use semver::Version;
+use serde::{Deserialize, Serialize};
+
+use crate::package::PackageHandler;
+
+/// Data struct
+#[derive(Debug, Clone, Deserialize, Serialize, Hash, PartialEq, Eq, PartialOrd, Ord)]
+pub struct Dependency {
+    name: String,
+    version: Version,
+    pub checksum: String,
+    #[serde(skip_serializing_if = "<Option<_>>::is_none")]
+    source: Option<String>, // Path / URL
+}
+
+impl Dependency {
+    /// Returns a path to the dependency in local storage
+    /// if there is one.
+    pub fn local_path(&self) -> String {
+        if self.source.as_ref().is_some_and(|path| !is_url(path)) {
+            return self.source.clone().unwrap();
+        }
+
+        // TODO: Convert from reverse domain name to path.
+        return self.name.clone();
+    }
+}
+
+impl From<PackageHandler> for Dependency {
+    fn from(value: PackageHandler) -> Self {
+        Dependency {
+            name: value.name(),
+            version: value.version(),
+            checksum: String::new(),
+            source: None,
+        }
+    }
+}
+
+/// TODO: This is just a placeholder at present.
+fn is_url<S: ToString>(path: S) -> bool {
+    return false;
+}