motd.sh and chooseIcon.sh

README.md

@@ -1,2 +1,45 @@
 # Andromeda
-Scripts for Minecraft Servers
+
+This repository contains two scripts, chooseIcon.sh and motd.sh, that dynamically randomize the Minecraft server's icon and message of the day (MOTD) on startup.
+## Purpose
+
+- chooseIcon.sh: Randomly selects a PNG icon (icon*.png) from /home/minecraft/icons and sets it as the server-icon.png.
+
+- motd.sh: Randomly selects a line from one of the motd*.txt files in /home/minecraft/motd and updates the motd field in your server.properties.
+
+Requirements
+
+- The icons must be stored in: /home/minecraft/icons
+
+- The MOTD text files must be stored in: /home/minecraft/motd
+
+- The Minecraft server.properties file must be located within the server directory or a subdirectory of where the script is called.
+
+## Usage
+
+To use these scripts, call them from your Minecraft server's start.sh script before the server starts.
+
+If your start.sh file is outside the server directory (i.e., the server is in a subdirectory), you must provide the server directory as a parameter when calling motd.sh.
+Example start.sh (located one level above the server folder):
+```
+#!/bin/bash
+
+# Choose a random server icon
+./chooseIcon.sh
+
+# Set a random MOTD (pass the path to the server directory)
+./motd.sh ./server
+
+# Start the Minecraft server
+cd server
+java -Xmx2G -Xms1G -jar server.jar nogui
+```
+## Future Improvements
+
+- Unique Icon and MOTD Per Server
+
+    Add logic to ensure no two concurrently running servers use the same icon or MOTD. This could be done by:
+
+    - Tracking assigned icons and MOTDs in temporary files (e.g., .used_icons, .used_motds)
+
+    - Automatically releasing resources when servers stop

chooseIcon.sh

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+mapfile -t ICON_FILES < <(find /home/minecraft/icons -type f -name "icon*.png")
+
+NUM_ICONS=${#ICON_FILES[@]}
+
+if [ $NUM_ICONS -eq 0 ]; then
+    echo "No icon PNG files found."
+    exit 1
+fi
+
+RAND_INDEX=$((RANDOM % NUM_ICONS))
+
+SELECTED_FILE="${ICON_FILES[$RAND_INDEX]}"
+
+echo "Number of icon PNGs found: $NUM_ICONS"
+echo "Selected file: $SELECTED_FILE"
+
+cp $SELECTED_FILE $PWD/server-icon.png

motd.sh

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+#!/bin/bash
+
+# Function to find server.properties dynamically
+find_server_properties() {
+    local search_dir="$1"
+    
+    # Look for server.properties in the given directory or parent directories
+    while [ "$search_dir" != "/" ]; do
+        if [ -f "$search_dir/server.properties" ]; then
+            echo "$search_dir/server.properties"
+            return
+        fi
+        search_dir=$(dirname "$search_dir")
+    done
+
+    echo "server.properties not found!"
+    exit 1
+}
+
+# If the script is being called with a path, use that; otherwise, use the current directory
+if [ -n "$1" ]; then
+    SERVER_PROPERTIES="$1/server.properties"
+else
+    SERVER_PROPERTIES=$(find_server_properties "$(pwd)")  # Find it starting from the current directory
+fi
+
+# Check if server.properties exists
+if [ ! -f "$SERVER_PROPERTIES" ]; then
+    echo "server.properties not found in $SERVER_PROPERTIES"
+    exit 1
+fi
+
+# Find all text files for MOTD 
+mapfile -t MOTD_FILES < <(find /home/minecraft/motd -type f -name "motd*.txt")
+
+NUM_MOTD=${#MOTD_FILES[@]}
+
+if [ $NUM_MOTD -eq 0 ]; then
+    echo "No MOTD files found."
+    exit 1
+fi
+
+# Pick a random file
+RAND_INDEX=$((RANDOM % NUM_MOTD))
+SELECTED_FILE="${MOTD_FILES[$RAND_INDEX]}"
+
+# Get number of lines
+NUM_LINES=$(wc -l < "$SELECTED_FILE")
+RAND_LINE=$((RANDOM % NUM_LINES + 1))
+
+# Get the selected line
+SELECTED_LINE=$(sed -n "${RAND_LINE}p" "$SELECTED_FILE")
+
+echo "Number of MOTD FILES found: $NUM_MOTD"
+echo "Number of lines in selected file: $NUM_LINES"
+echo "Random line number: $RAND_LINE"
+echo "Selected line: $SELECTED_LINE"
+
+# Escape special characters
+ESCAPED_LINE=$(echo "$SELECTED_LINE" | sed 's/\\/\\\\/g; s/:/\\:/g')
+
+# Replace or add `motd=` in the found server.properties
+if grep -q "^motd=" "$SERVER_PROPERTIES"; then
+    sed -i.bak "s/^motd=.*/motd=$ESCAPED_LINE/" "$SERVER_PROPERTIES"
+else
+    echo "motd=$ESCAPED_LINE" >> "$SERVER_PROPERTIES"
+fi
+
+echo "Updated server.properties with new MOTD!"