From 597e42b8c482fe40e19543e2b26c686cf65081fa Mon Sep 17 00:00:00 2001
From: SeaswimmerTheFsh <seaswimmerthefsh@gmail.com>
Date: Tue, 15 Aug 2023 02:50:41 -0400
Subject: [PATCH] added last_downloaded_version parameter

---
 start_server.sh | 79 +++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 67 insertions(+), 12 deletions(-)

diff --git a/start_server.sh b/start_server.sh
index d6b9358..351f98a 100755
--- a/start_server.sh
+++ b/start_server.sh
@@ -35,19 +35,40 @@ else
     fi
 fi
 
-# This handles automatically updating the Factorio binary.
-echo "Fetching Factorio binary..."
-wget "https://factorio.com/get-download/${version}/headless/linux64" -O factorio_headless.tar.xz
-if [ $? -ne 0 ]; then
-    echo "FATAL: There is not a headless linux64 build available for the version you've selected in your ${configpath} file."
-    echo "FATAL: See this website for a list of all Factorio versions: https://factorio.com/download/archive/"
-    rm -f factorio_headless.tar.xz
-    exit 1
+# Load the last downloaded Factorio version from config.sh, if available
+if [ "$configpath" = "config.sh" ]; then
+    last_downloaded_version=$(grep -oP 'last_downloaded_version=\K[^"]*' "$configpath")
+    if [ $? -ne 0 ]; then
+        last_download_version="None"
+    fi
+else
+    last_downloaded_version="None"
+fi
+
+# Check if the last downloaded version matches the current version
+if [ "$last_downloaded_version" != "$version" ] || [ "$last_downloaded_version" = "stable" ] || [ "$last_downloaded_version" = "latest" ]; then
+    echo "Fetching Factorio binary..."
+    wget "https://factorio.com/get-download/${version}/headless/linux64" -O factorio_headless.tar.xz
+    if [ $? -ne 0 ]; then
+        echo "FATAL: There is not a headless linux64 build available for the version you've selected in your ${configpath} file."
+        echo "FATAL: See this website for a list of all Factorio versions: https://factorio.com/download/archive/"
+        rm -f factorio_headless.tar.xz
+        exit 1
+    fi
+    echo "Extracting Factorio binary..."
+    tar -xf factorio_headless.tar.xz --strip-components=1 --overwrite
+    echo "Factorio binary updated!"
+    rm -f factorio_headless.tar.xz
+else
+    echo "Not updating Factorio binary, as the existing version matches the version stated in the configuration file."
+fi
+
+# Update the last downloaded version in the config.sh file
+if [ "$configpath" = "config.sh" ]; then
+    sed -i "/last_downloaded_version=.*/i # This parameter is used for auto-updating the Factorio binary." "$configpath"
+    sed -i "/last_downloaded_version=.*/i # Do not change this parameter unless you know what you're doing!" "$configpath"
+    sed -i "s/last_downloaded_version=.*/last_downloaded_version=\"$version\"/" "$configpath"
 fi
-echo "Extracting Factorio binary..."
-tar -xf factorio_headless.tar.xz --strip-components=1 --overwrite
-echo "Factorio binary updated!"
-rm -f factorio_headless.tar.xz
 
 # This checks if the ./saves/$save_name.zip save file exists or not...
 if [ ! -f "./saves/${save_name}.zip" ]; then
@@ -61,3 +82,37 @@ byobu new-session -d -s factorio "./bin/x64/factorio ${extra_params_start_server
 # This attaches the current terminal to the byobu session.
 # Comment this out if you don't want this functionality.
 byobu attach -t factorio
+
+
+# Load the last downloaded Factorio version from config.sh, if available
+if [ "$configpath" = "config.sh" ]; then
+    last_downloaded_version=$(grep -oP 'last_downloaded_version=\K[^"]*' "$configpath")
+    if [ $? -ne 0 ]; then
+        last_download_version="None"
+    fi
+else
+    last_downloaded_version="None"
+fi
+
+# Check if the last downloaded version matches the current version
+if [ "$last_downloaded_version" != "$version" ] || [ "$last_downloaded_version" = "stable" ] || [ "$last_downloaded_version" = "latest" ]; then
+    echo "Fetching Factorio binary..."
+    wget "https://factorio.com/get-download/${version}/headless/linux64" -O factorio_headless.tar.xz
+    if [ $? -ne 0 ]; then
+        echo "FATAL: There is not a headless linux64 build available for the version you've selected in your ${configpath} file."
+        echo "FATAL: See this website for a list of all Factorio versions: https://factorio.com/download/archive/"
+        rm -f factorio_headless.tar.xz
+        exit 1
+    fi
+    echo "Extracting Factorio binary..."
+    tar -xf factorio_headless.tar.xz --strip-components=1 --overwrite
+    echo "Factorio binary updated!"
+    rm -f factorio_headless.tar.xz
+else
+    echo "Not updating Factorio binary, as the existing version matches the version stated in the configuration file."
+
+    # Update the last downloaded version in the config.sh file
+    if [ -f "$configpath" ]; then
+        sed -i "s/last_downloaded_version=.*/last_downloaded_version=\"$version\"/" "$configpath"
+    fi
+fi