From 3337a12ffa22d84abe43ba4e28353ed4857c3b0c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Lower?= <keton22@gmail.com>
Date: Mon, 15 Jan 2024 16:53:48 +0100
Subject: [PATCH] Support passing `game.start_command` to mods

This change together with https://github.com/praydog/uevr-frontend/pull/9 will allow one click 'launch to VR' from within Rai Pal.
This also introduces proper division of responsibility where Rai Pal knows what to launch and UEVRInjector knows how to launch it.

On top of the code change UEVR `rai-pal-manifest.json` needs to look like this:
```json
{
  "version": "1.03",
  "runnable": {
    "path": "UEVRInjector.exe",
    "args": [
      "--attach={{ExecutableName}}", "--delay=30", "--launch={{StartCommand}}"
    ]
  },
  "engine": "Unreal",
  "unityBackend": null
}
```
---
 backend/src/mod_loaders/runnable_loader.rs | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/backend/src/mod_loaders/runnable_loader.rs b/backend/src/mod_loaders/runnable_loader.rs
index 65e98d63..f457250c 100644
--- a/backend/src/mod_loaders/runnable_loader.rs
+++ b/backend/src/mod_loaders/runnable_loader.rs
@@ -27,7 +27,7 @@ use crate::{
 	result::Error,
 	serializable_enum,
 	serializable_struct,
-	Result,
+	Result, providers::provider_command::ProviderCommand,
 };
 
 serializable_struct!(RunnableLoader {
@@ -38,6 +38,7 @@ serializable_enum!(RunnableParameter {
 	ExecutableName,
 	ExecutablePath,
 	GameJson,
+	StartCommand,
 });
 
 #[async_trait]
@@ -92,6 +93,15 @@ fn replace_parameters(argument: &str, game: &InstalledGame) -> String {
 	result = replace_parameter_value(&result, RunnableParameter::GameJson, || {
 		Ok(serde_json::to_string(&game)?)
 	});
+	result = replace_parameter_value(&result, RunnableParameter::StartCommand, || {
+		match &game.start_command {
+			Some(provider_command) => match provider_command {
+				ProviderCommand::String(s) => Ok(s.to_string()),
+				ProviderCommand::Path(_, _) => Ok(game.executable.path.to_string_lossy().to_string()) // for GOG we can use .exe directly
+			}
+			None => Ok(game.executable.path.to_string_lossy().to_string()) // fallback to path
+		}
+	});
 
 	result
 }