From 8b850c2d095b3e391c62920b9b1096d5f994c7a6 Mon Sep 17 00:00:00 2001
From: Tom5521 <thomas.bored4ever@gmail.com>
Date: Sat, 13 Jan 2024 13:48:49 -0300
Subject: [PATCH] Now you can download and use zdoom on linux!

---
 README.md                     |  2 +-
 internal/download/main.go     | 71 +++++++++++++++++++++++++++++++++--
 internal/gui/configuration.go |  4 --
 3 files changed, 69 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index e9c87f8..6aaa8ad 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ A cross-platform launcher for *zdoom
 
 - Light/dark mode toggle
 - Cross platform
-- Auto download gzdoom/zdoom
+- Assisted download of gzdoom/zdoom
 
 ## Installation
 
diff --git a/internal/download/main.go b/internal/download/main.go
index 142df69..025c54c 100644
--- a/internal/download/main.go
+++ b/internal/download/main.go
@@ -24,6 +24,7 @@ const (
 	WinGZDoomURL   = "https://github.com/ZDoom/gzdoom/releases/download/g4.11.3/gzdoom-4-11-3.a.-Windows-64bit.zip"
 	WinZDoomURL    = "https://zdoom.org/files/zdoom/2.8/zdoom-2.8.1.zip"
 	LinuxGZDoomURL = "https://github.com/ZDoom/gzdoom/releases/download/g4.11.3/gzdoom-g4.11.3-linux-portable.tar.xz"
+	LinuxZDoomURL  = "https://zdoom.org/files/zdoom/2.8/zdoom_2.8.1_amd64.deb"
 )
 
 func Download(url, file string) error {
@@ -92,7 +93,7 @@ func GZDoom() error {
 	if IsWindows {
 		settings.GZDoomDir = config.CurrentPath + `\gzdoom\gzdoom.exe`
 	}
-	err = settings.Write()
+	err = os.RemoveAll(path)
 	if err != nil {
 		return err
 	}
@@ -102,8 +103,15 @@ func GZDoom() error {
 // Only with windows.
 func ZDoom() error {
 	if IsLinux {
-		return ErrOnlyForWindows
+		return linuxZdoom()
 	}
+	if IsWindows {
+		return windowsZdoom()
+	}
+	return nil
+}
+
+func windowsZdoom() error {
 	path := config.CurrentPath + `\zdoom.zip`
 	url := WinZDoomURL
 	err := Download(url, path)
@@ -119,9 +127,66 @@ func ZDoom() error {
 		return err
 	}
 	settings.ZDoomDir = config.CurrentPath + `\zdoom\zdoom.exe`
-	err = settings.Write()
+	return nil
+}
+
+func linuxZdoom() error {
+	var (
+		debName = "zdoom.deb"
+		path    = config.CurrentPath + "/" + debName
+		url     = LinuxZDoomURL
+		tmpDir  = "tmp-zdoom"
+	)
+	err := Download(url, path)
 	if err != nil {
 		return err
 	}
+	err = os.Chdir(config.CurrentPath)
+	if err != nil {
+		return err
+	}
+	if _, err = os.Stat(tmpDir); os.IsNotExist(err) {
+		err = os.Mkdir(tmpDir, os.ModePerm)
+		if err != nil {
+			return err
+		}
+	}
+	cmd := exec.Command("ar", "x", debName, "--output="+tmpDir)
+	err = cmd.Run()
+	if err != nil {
+		return err
+	}
+	err = os.Chdir(tmpDir)
+	if err != nil {
+		return err
+	}
+	if _, err = os.Stat("zdoom"); os.IsNotExist(err) {
+		err = os.Mkdir("zdoom", os.ModePerm)
+		if err != nil {
+			return err
+		}
+	}
+	cmd = exec.Command("tar", "-xf", "data.tar.xz", "-C", "zdoom")
+	err = cmd.Run()
+	if err != nil {
+		return err
+	}
+	cmd = exec.Command("cp", "-rf", "zdoom/opt/zdoom", config.CurrentPath)
+	err = cmd.Run()
+	if err != nil {
+		return err
+	}
+	err = os.Chdir(config.CurrentPath)
+	if err != nil {
+		return err
+	}
+	toRemove := []string{tmpDir, debName}
+	for _, f := range toRemove {
+		err = os.RemoveAll(f)
+		if err != nil {
+			return err
+		}
+	}
+	settings.ZDoomDir = config.CurrentPath + "/zdoom/zdoom"
 	return nil
 }
diff --git a/internal/gui/configuration.go b/internal/gui/configuration.go
index 53f19cb..e3ad2a7 100644
--- a/internal/gui/configuration.go
+++ b/internal/gui/configuration.go
@@ -1,7 +1,6 @@
 package gui
 
 import (
-	"runtime"
 	"time"
 
 	"fyne.io/fyne/v2"
@@ -137,9 +136,6 @@ func (ui *configUI) downBox() *fyne.Container {
 		time.Sleep(time.Second * 2)
 		down.zdoom.SetText(po.Get("Download ZDoom"))
 	}
-	if runtime.GOOS == "linux" {
-		down.zdoom.Disable()
-	}
 
 	downloadCont := container.NewAdaptiveGrid(2, down.gzdoom, down.zdoom)
 	return downloadCont