dnsm

#!/bin/bash

# Simple DNS manager for Linux

# Directory to store favorite configurations
CONFIGS_DIR="./configs"
RESOLV_CONF="/etc/resolv.conf"

# Ensure the configs directory exists
mkdir -p "$CONFIGS_DIR"

# Function to view the current config
view_current_config() {
    dialog --title "Current /etc/resolv.conf" --msgbox "$(cat $RESOLV_CONF)" 20 60
}

# Function to display favorite configs
view_favorites() {
    configs=("$CONFIGS_DIR"/*.conf)
    config_names=()
    
    for config in "${configs[@]}"; do
        config_names+=("$(basename "$config")")
    done

    if [ ${#config_names[@]} -eq 0 ]; then
        dialog --msgbox "No favorite configurations found." 10 40
        return
    fi

    config_choice=$(dialog --title "Favorites" --menu "Select a config to view" 15 50 5 "${config_names[@]}" 3>&1 1>&2 2>&3)

    if [ -n "$config_choice" ]; then
        dialog --title "Config: $config_choice" --msgbox "$(cat "$CONFIGS_DIR/$config_choice")" 20 60
    fi
}

# Function to edit the current config
edit_current_config() {
    sudo nano "$RESOLV_CONF"
}

# Function to create a new config
new_config() {
    config_name=$(dialog --inputbox "Enter new configuration name:" 10 30 3>&1 1>&2 2>&3)
    if [ -n "$config_name" ]; then
        nano "$CONFIGS_DIR/$config_name.conf"
    fi
}

# Function to load a config
load_config() {
    configs=("$CONFIGS_DIR"/*.conf)
    config_names=()

    for config in "${configs[@]}"; do
        config_names+=("$(basename "$config")")
    done

    if [ ${#config_names[@]} -eq 0 ]; then
        dialog --msgbox "No configurations available to load." 10 40
        return
    fi

    config_choice=$(dialog --title "Load Config" --menu "Select a config to load into /etc/resolv.conf" 15 50 5 "${config_names[@]}" 3>&1 1>&2 2>&3)

    if [ -n "$config_choice" ]; then
        backup_choice=$(dialog --yesno "Do you want to backup the current /etc/resolv.conf before loading?" 10 30 3>&1 1>&2 2>&3)

        if [ $? -eq 0 ]; then
            cp "$RESOLV_CONF" "$RESOLV_CONF.bak"
            dialog --msgbox "Backup created at $RESOLV_CONF.bak" 10 30
        fi

        sudo cp "$CONFIGS_DIR/$config_choice" "$RESOLV_CONF"
        dialog --msgbox "Configuration $config_choice loaded successfully." 10 30
    fi
}

# Function to save the current config
save_current_config() {
    config_name=$(dialog --inputbox "Enter name to save current configuration as:" 10 30 3>&1 1>&2 2>&3)
    if [ -n "$config_name" ]; then
        sudo cp "$RESOLV_CONF" "$CONFIGS_DIR/$config_name.conf"
        dialog --msgbox "Current configuration saved as $config_name.conf" 10 30
    fi
}

# Main menu
while true; do
    choice=$(dialog --clear --title "DNS Config Manager" --menu "Choose an option:" 15 50 5 \
        1 "View config" \
        2 "Edit config" \
        3 "Exit" 3>&1 1>&2 2>&3)

    case $choice in
        1)
            view_choice=$(dialog --clear --title "View Config" --menu "Choose an option:" 15 50 3 \
                1 "Current config" \
                2 "Favorites" 3>&1 1>&2 2>&3)
            case $view_choice in
                1) view_current_config ;;
                2) view_favorites ;;
            esac
            ;;
        2)
            edit_choice=$(dialog --clear --title "Edit Config" --menu "Choose an option:" 15 50 4 \
                1 "Edit current config" \
                2 "New config" \
                3 "Load config" \
                4 "Save config" 3>&1 1>&2 2>&3)
            case $edit_choice in
                1) edit_current_config ;;
                2) new_config ;;
                3) load_config ;;
                4) save_current_config ;;
            esac
            ;;
        3)
            break
            ;;
    esac
done

# Clear screen after exit
clear