Isolate change_port

core/scripts/hysteria2/change_port.sh

@@ -0,0 +1,16 @@
+while true; do
+    read -p "Enter the new port number you want to use: " port
+    if ! [[ "$port" =~ ^[0-9]+$ ]] || [ "$port" -lt 1 ] || [ "$port" -gt 65535 ]; then
+        echo "Invalid port number. Please enter a number between 1 and 65535."
+    else
+        break
+    fi
+done
+
+if [ -f "/etc/hysteria/config.json" ]; then
+    jq --arg port "$port" '.listen = ":" + $port' /etc/hysteria/config.json > /etc/hysteria/config_temp.json && mv /etc/hysteria/config_temp.json /etc/hysteria/config.json
+    restart_hysteria_service >/dev/null 2>&1
+    echo "Port changed successfully to $port."
+else
+    echo "${red}Error:${NC} Config file /etc/hysteria/config.json not found."
+fi