feat(download manager): only allow downloads for supported platforms

src-tauri/src/process/process_manager.rs

@@ -0,0 +1,45 @@
+use std::{collections::HashMap, sync::LazyLock};
+
+use serde::{Deserialize, Serialize};
+
+pub struct ProcessManager {
+    current_platform: Platform,
+}
+
+impl ProcessManager {
+    pub fn new() -> Self {
+        ProcessManager {
+            current_platform: if cfg!(windows) {
+                Platform::Windows
+            } else {
+                Platform::Linux
+            },
+        }
+    }
+
+    pub fn valid_platform(&self, platform: &Platform) -> Result<bool, String> {
+        let current = &self.current_platform;
+        let valid_platforms = PROCESS_COMPATABILITY_MATRIX
+            .get(current)
+            .ok_or("Incomplete platform compatability matrix.")?;
+
+        Ok(valid_platforms.contains(platform))
+    }
+}
+
+#[derive(Eq, Hash, PartialEq, Serialize, Deserialize, Clone)]
+pub enum Platform {
+    Windows,
+    Linux,
+}
+
+pub type ProcessCompatabilityMatrix = HashMap<Platform, Vec<Platform>>;
+pub static PROCESS_COMPATABILITY_MATRIX: LazyLock<ProcessCompatabilityMatrix> =
+    LazyLock::new(|| {
+        let mut matrix: ProcessCompatabilityMatrix = HashMap::new();
+
+        matrix.insert(Platform::Windows, vec![Platform::Windows]);
+        matrix.insert(Platform::Linux, vec![Platform::Linux]); // TODO: add Proton support
+
+        return matrix;
+    });