Add libraryfolders.vdf parsing for Steam handler

GameFinder.StoreHandlers.Steam/SteamHandler.cs

@@ -1,9 +1,10 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using System.Text;
+using System.Text.RegularExpressions;
 using GameFinder.RegistryUtils;
 using JetBrains.Annotations;
 using Microsoft.Win32;
@@ -27,6 +28,7 @@ public class SteamHandler : AStoreHandler<SteamGame>
         /// </summary>
         public readonly string? SteamPath;
         private string? SteamConfig { get; set; }
+        private string? SteamLibraries { get; set; }
 
         /// <summary>
         /// List of all found Steam Universes
@@ -73,9 +75,17 @@ public SteamHandler()
                 return;
             }
 
+            var steamLibraries = Path.Combine(steamPath, "steamapps", "libraryfolders.vdf");
+            if (!File.Exists(steamLibraries))
+            {
+                _initErrors.Add($"Unable to find libraryfolders.vdf at {steamLibraries}");
+                return;
+            }
+
             FoundSteam = true;
             SteamPath = steamPath;
             SteamConfig = steamConfig;
+            SteamLibraries = steamLibraries;
         }
 
         /// <summary>
@@ -96,16 +106,24 @@ public SteamHandler(string steamPath)
                 return;
             }
 
+            var steamLibraries = Path.Combine(steamPath, "steamapps", "libraryfolders.vdf");
+            if (!File.Exists(steamLibraries))
+            {
+                _initErrors.Add($"Unable to find libraryfolders.vdf at {steamLibraries}");
+                return;
+            }
+
             FoundSteam = true;
             SteamPath = steamPath;
             SteamConfig = steamConfig;
+            SteamLibraries = steamLibraries;
         }
 
         private Result<bool> FindAllUniverses()
         {
             if (!FoundSteam) return NotOk(_initErrors);
             if (SteamConfig == null) return NotOk(_initErrors);
-            if (SteamConfig == null) return NotOk(_initErrors);
+            if (SteamLibraries == null) return NotOk(_initErrors);
 
             var res = new Result<bool>();
             var lines = File.ReadAllLines(SteamConfig, Encoding.UTF8);
@@ -130,6 +148,29 @@ private Result<bool> FindAllUniverses()
                 SteamUniverses.Add(path);
             }
 
+            lines = File.ReadAllLines(SteamLibraries, Encoding.UTF8);
+            var rx = new Regex(@"\s+""\d+\""\s+""(?<path>.+)""");
+
+            foreach (var line in lines)
+            {
+                var matches = rx.Matches(line);
+                foreach (Match match in matches)
+                {
+                    var groups = match.Groups;
+                    var path = Path.Combine(groups["path"].Value, "steamapps");
+                    if (!Directory.Exists(path))
+                    {
+                        res.AddError($"Unable to find Universe at {path}");
+                        continue;
+                    }
+
+                    if (!SteamUniverses.Contains(path))
+                    {
+                        SteamUniverses.Add(path);
+                    }
+                }
+            }
+
             if (SteamPath == null) return Ok(res);
 
             var defaultPath = Path.Combine(SteamPath, "steamapps");
@@ -144,7 +185,7 @@ public override Result<bool> FindAllGames()
         {
             if (!FoundSteam) return NotOk(_initErrors);
             if (SteamConfig == null) return NotOk(_initErrors);
-            if (SteamConfig == null) return NotOk(_initErrors);
+            if (SteamLibraries == null) return NotOk(_initErrors);
 
             var universeRes = FindAllUniverses();
             if (!universeRes.Value)

GameFinder.Tests/Setup.cs

@@ -23,10 +23,13 @@ public static string SetupSteam()
             Directory.CreateDirectory(steamConfigDir);
             var steamConfig = Path.Combine(steamConfigDir, "config.vdf");
             File.WriteAllText(steamConfig, "Hello World!", Encoding.UTF8);
-
+            
             var steamappsDir = Path.Combine(steamDir, "steamapps");
             Directory.CreateDirectory(steamappsDir);
 
+            var steamLibraries = Path.Combine(steamappsDir, "libraryfolders.vdf");
+            File.WriteAllText(steamLibraries, "Hello World!", Encoding.UTF8);
+
             var manifestFile = GetFile("appmanifest_72850.acf");
             var manifestOutput = Path.Combine(steamappsDir, "appmanifest_72850.acf");
 

README.md

@@ -36,9 +36,9 @@ If you build some sort of game library manager like [Playnite](https://github.co
 
 Source: [SteamHandler.cs](GameFinder.StoreHandlers.Steam/SteamHandler.cs)
 
-Steam games can be easily found by searching through _"Steam Universes"_. An Universe is simply a folder where you install Steam games. You can find all Universes by parsing the `config.vdf` file in `Steam/config`. We can get the Steam folder by opening the registry key `HKEY_CURRENT_USER\Software\Valve\Steam` and getting the `SteamPath` value.
+Steam games can be easily found by searching through _"Steam Universes"_. An Universe is simply a folder where you install Steam games. You can find all Universes by parsing some configuration files in the Steam folder. We can get the Steam folder by opening the registry key `HKEY_CURRENT_USER\Software\Valve\Steam` and getting the `SteamPath` value.
 
-The `config.vdf` file uses Valve's KeyValue format which is similar to JSON:
+The `config/config.vdf` file uses Valve's KeyValue format which is similar to JSON. What we want to look for are these `BaseInstallFolder_X` values which point to a Universe folder.
 
 ```text
 "InstallConfigStore"
@@ -57,7 +57,21 @@ The `config.vdf` file uses Valve's KeyValue format which is similar to JSON:
 }
 ```
 
-What we want to look for are these `BaseInstallFolder_X` values which point to a Universe folder. The `steamapps` subdirectory contains the `appmanifest_*.acf` files we need. `.acf` files have the same KeyValue format as `.vdf` files so parsing very easy:
+The `steamapps/libraryfolders.vdf` uses the same type of formatting as above. The lines with a numeric key point to a Universe folder. These numbers should match up with the `BaseInstallFolder_X` values in `config/config.vdf`.
+
+```text
+"LibraryFolders"
+{
+	"TimeNextStatsReport"		"1623187700"
+	"ContentStatsID"		"-8832980547670729777"
+	"1"		"F:\\SteamLibrary"
+	"3"		"E:\\SteamLibrary"
+}
+```
+
+Both `config/config.vdf` and `steamapps/libraryfolders.vdf` are parsed for possible Universe locations. Steam should keep these files synced but there have been some user reports of this not happening.
+
+The `steamapps` subdirectory contains the `appmanifest_*.acf` files we need. `.acf` files have the same KeyValue format as `.vdf` files so parsing is very easy:
 
 ```text
 "AppState"