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* Represents a voice-activated command that can trigger game actions.
*
* @interface GameCommand
* @example
* ```TypeScript
* const jumpCommand: GameCommand = {
* name: "jump",
* action: () => player.jump(),
* description: "Makes the player character jump",
* active: true
* };
* ```
*/
export interface GameCommand {
/**
* The name/trigger phrase for the command.
* This is the word or phrase that will be recognized to trigger the action.
*
* @type {string}
* @example "jump", "move left", "fire weapon"
*/
name: string;
/**
* The callback function to execute when this command is triggered.
* This function contains the game logic that should run when the voice command is recognized.
*
* @type {() => void}
* @example () => player.jump()
*/
action: () => void;
/**
* A human-readable description of what this command does.
* Used for documentation, help menus, or accessibility features.
*
* @type {string}
* @example "Makes the player character jump into the air"
*/
description: string;
/**
* Whether this command is currently enabled and can be triggered.
* Inactive commands will not respond to voice input.
*
* @type {boolean}
* @default true
*/
active: boolean;
}
/**
* CommandLibrary contains a HashMap that:
* Maps synonyms to command names for flexible voice recognition
* Can be called by CommandMapper.
* Maps a String command to the corresponding GameCommand.
*/
export class CommandLibrary {
private commandMap: Map<string, GameCommand>;
private synonymMap: Map<string, string>;
private static instance: CommandLibrary;
constructor() {
this.commandMap = new Map<string, GameCommand>();
this.synonymMap = new Map<string, string>();
}
/**
* @returns The singleton instance of CommandLibrary.
*/
public static getInstance(): CommandLibrary {
if (!CommandLibrary.instance) {
CommandLibrary.instance = new CommandLibrary();
}
return CommandLibrary.instance;
}
private normalize(name: string): string {
return name.toLowerCase().trim();
}
/** Add a command (returns false if name already exists) */
public add(command: GameCommand): boolean {
const key = this.normalize(command.name);
if (!key) return false;
if (this.commandMap.has(key)) return false;
// store normalized name internally
this.commandMap.set(key, { ...command, name: key, active: command.active ?? true });
return true;
}
/**
* Adds a synonym mapping for a command.
* Maps a synonym word to a command name.
*
* Example: addSynonym("leap", "jump") means "leap" will trigger "jump" command
*
* @param {string} synonym - The synonym word (e.g., "leap")
* @param {string} commandName - The actual command name (e.g., "jump")
* @returns {boolean} True if added successfully, false if synonym already exists or command doesn't exist
*/
public addSynonym(synonym: string, commandName: string): boolean {
const normalizedSynonym = this.normalize(synonym);
const normalizedCommand = this.normalize(commandName);
// Check if the command exists
if (!this.commandMap.has(normalizedCommand)) {
console.warn(`Cannot add synonym "${synonym}": command "${commandName}" does not exist`);
return false;
}
// Don't allow the command name itself as a synonym (redundant)
if (normalizedSynonym === normalizedCommand) {
console.warn(`Cannot add synonym: "${synonym}" is the same as command name`);
return false;
}
// Check if synonym already exists (pointing to a different command)
if (this.synonymMap.has(normalizedSynonym)) {
const existingCommand = this.synonymMap.get(normalizedSynonym);
if (existingCommand !== normalizedCommand) {
console.warn(`Synonym "${synonym}" already maps to "${existingCommand}"`);
return false;
}
// Already points to the same command, no need to add again
return true;
}
// Add the synonym mapping
this.synonymMap.set(normalizedSynonym, normalizedCommand);
console.log(`Synonym added: "${synonym}" → "${commandName}"`);
return true;
}
/**
* Adds multiple synonyms for a command at once.
*
* @param {string[]} synonyms - Array of synonym words
* @param {string} commandName - The command name they should map to
* @returns {number} Number of synonyms successfully added
*/
public addSynonyms(synonyms: string[], commandName: string): number {
let count = 0;
for (const synonym of synonyms) {
if (this.addSynonym(synonym, commandName)) {
count++;
}
}
return count;
}
/**
* Removes a command by name.
* Also removes all synonyms that point to this command.
*
* @param {string} name - The command name to remove
* @returns {boolean} True if removed, false if not found
*/
public remove(name: string): boolean {
const normalized = this.normalize(name);
// Remove the command
const removed = this.commandMap.delete(normalized);
if (removed) {
// Remove all synonyms that point to this command
const synonymsToRemove: string[] = [];
for (const [synonym, commandName] of this.synonymMap.entries()) {
if (commandName === normalized) {
synonymsToRemove.push(synonym);
}
}
for (const synonym of synonymsToRemove) {
this.synonymMap.delete(synonym);
}
console.log(`Removed command "${name}" and ${synonymsToRemove.length} synonym(s)`);
}
return removed;
}
/** Check if a command exists */
public has(name: string): boolean {
return this.commandMap.has(this.normalize(name));
}
/** Get a command by name */
public get(name: string): GameCommand | undefined {
return this.commandMap.get(this.normalize(name));
}
/**
* Finds a command by checking if the word is a synonym.
* Returns the command that the synonym points to.
*
* Example: findCommandBySynonym("leap") returns the "jump" command
*
* @param {string} word - The word to look up (could be a synonym)
* @returns {GameCommand | undefined} The command if the word is a registered synonym
*/
public findCommandBySynonym(word: string): GameCommand | undefined {
const normalized = this.normalize(word);
// Check if this word is a synonym
const commandName = this.synonymMap.get(normalized);
if (commandName) {
// Return the actual command
return this.commandMap.get(commandName);
}
return undefined;
}
/**
* Gets all synonyms for a specific command.
*
* @param {string} commandName - The command name
* @returns {string[]} Array of synonyms that map to this command
*/
public getSynonymsForCommand(commandName: string): string[] {
const normalized = this.normalize(commandName);
const synonyms: string[] = [];
for (const [synonym, command] of this.synonymMap.entries()) {
if (command === normalized) {
synonyms.push(synonym);
}
}
return synonyms;
}
/** List all commands */
public list(): GameCommand[] {
return Array.from(this.commandMap.values());
}
/** Clear all commands */
public clear(): void {
this.commandMap.clear();
this.synonymMap.clear();
}
/**
* Gets the total number of synonyms stored.
*
* @returns {number} Number of synonym mappings
*/
public getSynonymCount(): number {
return this.synonymMap.size;
}
}
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