openvr manifest installer

src/backend/openvr/manifest.rs

@@ -0,0 +1,72 @@
+use std::{fs::File, io::Read};
+
+use json::{array, object};
+use ovr_overlay::applications::ApplicationsManager;
+
+use crate::config_io::CONFIG_ROOT_PATH;
+
+const APP_KEY: &str = "galister.wlxoverlay-s";
+
+pub(super) fn install_manifest(app_mgr: &mut ApplicationsManager) {
+    let executable_pathbuf = std::env::current_exe().unwrap();
+    let executable_path = executable_pathbuf.to_str().unwrap();
+    let manifest_path = CONFIG_ROOT_PATH.join("wlx-overlay-s.vrmanifest");
+
+    if let Ok(true) = app_mgr.is_application_installed(APP_KEY) {
+        if let Ok(mut file) = File::open(&manifest_path) {
+            let mut buf = String::new();
+            if let Ok(_) = file.read_to_string(&mut buf) {
+                let manifest: json::JsonValue = json::parse(&buf).unwrap();
+                if manifest["applications"][0]["binary_path_linux"] == executable_path {
+                    log::info!("Manifest already up to date");
+                    return;
+                }
+            }
+        }
+    }
+
+    let manifest = object! {
+        source: "builtin",
+        applications: array![
+            object! {
+                app_key: APP_KEY,
+                launch_type: "binary",
+                binary_path_linux: executable_path,
+                is_dashboard_overlay: true,
+                strings: object!{
+                    "en_us": object!{
+                        name: "WlxOverlay-S",
+                        description: "A lightweight Wayland desktop overlay for OpenVR/OpenXR",
+                    },
+                },
+            },
+        ],
+    };
+
+    let Ok(mut file) = File::create(&manifest_path) else {
+        log::error!("Failed to create manifest file at {:?}", manifest_path);
+        return;
+    };
+
+    let Ok(()) = manifest.write(&mut file) else {
+        log::error!("Failed to write manifest file at {:?}", manifest_path);
+        return;
+    };
+
+    let Ok(()) = app_mgr.add_application_manifest(&manifest_path, false) else {
+        log::error!("Failed to add manifest to OpenVR");
+        return;
+    };
+}
+
+pub(super) fn uninstall_manifest(app_mgr: &mut ApplicationsManager) {
+    let manifest_path = CONFIG_ROOT_PATH.join("wlx-overlay-s.vrmanifest");
+
+    if let Ok(true) = app_mgr.is_application_installed(APP_KEY) {
+        let Ok(()) = app_mgr.remove_application_manifest(&manifest_path) else {
+            log::error!("Failed to remove manifest from OpenVR");
+            return;
+        };
+        log::info!("Uninstalled manifest");
+    }
+}