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#!/usr/bin/env bash
# =============================================================================
# AzerothCore Menu System Library
# =============================================================================
# This library provides a unified menu system for AzerothCore scripts.
# It supports ordered menu definitions, short commands, numeric selection,
# and proper argument handling.
#
# Features:
# - Single source of truth for menu definitions
# - Automatic ID assignment (1, 2, 3...)
# - Short command aliases (c, i, q, etc.)
# - Interactive mode: numbers + long/short commands
# - Direct mode: only long/short commands (no numbers)
# - Proper argument forwarding
#
# Usage:
# source "path/to/menu_system.sh"
# menu_items=("command|short|description" ...)
# menu_run "Menu Title" callback_function "${menu_items[@]}" "$@"
# =============================================================================
# Global arrays for menu state (will be populated by menu_define)
declare -a _MENU_KEYS=()
declare -a _MENU_SHORTS=()
declare -a _MENU_OPTIONS=()
# Parse menu items and populate global arrays
# Usage: menu_define array_elements...
function menu_define() {
# Clear previous state
_MENU_KEYS=()
_MENU_SHORTS=()
_MENU_OPTIONS=()
# Parse each menu item: "key|short|description"
local item key short desc
for item in "$@"; do
IFS='|' read -r key short desc <<< "$item"
_MENU_KEYS+=("$key")
_MENU_SHORTS+=("$short")
_MENU_OPTIONS+=("$key ($short): $desc")
done
}
# Display menu with numbered options
# Usage: menu_display "Menu Title"
function menu_display() {
local title="$1"
echo "==== $title ===="
for idx in "${!_MENU_OPTIONS[@]}"; do
local num=$((idx + 1))
printf "%2d) %s\n" "$num" "${_MENU_OPTIONS[$idx]}"
done
echo ""
}
# Find menu index by user input (number, long command, or short command)
# Returns: index (0-based) or -1 if not found
# Usage: index=$(menu_find_index "user_input")
function menu_find_index() {
local user_input="$1"
# Try numeric selection first
if [[ "$user_input" =~ ^[0-9]+$ ]]; then
local num=$((user_input - 1))
if [[ $num -ge 0 && $num -lt ${#_MENU_KEYS[@]} ]]; then
echo "$num"
return 0
fi
fi
# Try long command name
local idx
for idx in "${!_MENU_KEYS[@]}"; do
if [[ "$user_input" == "${_MENU_KEYS[$idx]}" ]]; then
echo "$idx"
return 0
fi
done
# Try short command
for idx in "${!_MENU_SHORTS[@]}"; do
if [[ "$user_input" == "${_MENU_SHORTS[$idx]}" ]]; then
echo "$idx"
return 0
fi
done
echo "-1"
return 1
}
# Handle direct execution (command line arguments)
# Disables numeric selection to prevent confusion with command arguments
# Usage: menu_direct_execute callback_function "$@"
function menu_direct_execute() {
local callback="$1"
shift
local user_input="$1"
shift
# Handle help requests directly
if [[ "$user_input" == "--help" || "$user_input" == "help" || "$user_input" == "-h" ]]; then
echo "Available commands:"
printf '%s\n' "${_MENU_OPTIONS[@]}"
return 0
fi
# Disable numeric selection in direct mode
if [[ "$user_input" =~ ^[0-9]+$ ]]; then
echo "Invalid option. Numeric selection is not allowed when passing arguments."
echo "Use command name or short alias instead."
return 1
fi
# Find command and execute
local idx
idx=$(menu_find_index "$user_input")
if [[ $idx -ge 0 ]]; then
"$callback" "${_MENU_KEYS[$idx]}" "$@"
return $?
else
echo "Invalid option. Use --help to see available commands." >&2
return 1
fi
}
# Handle interactive menu selection
# Usage: menu_interactive callback_function "Menu Title"
function menu_interactive() {
local callback="$1"
local title="$2"
while true; do
menu_display "$title"
read -r -p "Please enter your choice: " REPLY
# Handle help request
if [[ "$REPLY" == "--help" || "$REPLY" == "help" || "$REPLY" == "h" ]]; then
echo "Available commands:"
printf '%s\n' "${_MENU_OPTIONS[@]}"
echo ""
continue
fi
# Find and execute command
local idx
idx=$(menu_find_index "$REPLY")
if [[ $idx -ge 0 ]]; then
"$callback" "${_MENU_KEYS[$idx]}"
else
echo "Invalid option. Please try again or use 'help' for available commands." >&2
echo ""
fi
done
}
# Main menu runner function
# Usage: menu_run "Menu Title" callback_function menu_item1 menu_item2 ... "$@"
function menu_run() {
local title="$1"
local callback="$2"
shift 2
# Extract menu items (all arguments until we find command line args)
local menu_items=()
local found_args=false
# Separate menu items from command line arguments
while [[ $# -gt 0 ]]; do
if [[ "$1" =~ \| ]]; then
# This looks like a menu item (contains pipe)
menu_items+=("$1")
shift
else
# This is a command line argument
found_args=true
break
fi
done
# Define menu from collected items
menu_define "${menu_items[@]}"
# Handle direct execution if arguments provided
if [[ $found_args == true ]]; then
menu_direct_execute "$callback" "$@"
return $?
fi
# Run interactive menu
menu_interactive "$callback" "$title"
}
# Utility function to show available commands (for --help)
# Usage: menu_show_help
function menu_show_help() {
echo "Available commands:"
printf '%s\n' "${_MENU_OPTIONS[@]}"
}
# Utility function to get command key by index
# Usage: key=$(menu_get_key index)
function menu_get_key() {
local idx="$1"
if [[ $idx -ge 0 && $idx -lt ${#_MENU_KEYS[@]} ]]; then
echo "${_MENU_KEYS[$idx]}"
fi
}
# Utility function to get all command keys
# Usage: keys=($(menu_get_all_keys))
function menu_get_all_keys() {
printf '%s\n' "${_MENU_KEYS[@]}"
}
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