Function getConfig

frontend/src/utils/config.ts:48–123

(key: K)

 * @returns The stored value, or the default if not found
 */
export function getConfig<K extends keyof ConfigValues>(key: K): ConfigValues[K] {
  if (typeof window === 'undefined') return DEFAULT_CONFIG[key];
  
  try {
    const storedValue = localStorage.getItem(`robotics_config_${key}`);
    if (storedValue === null) return DEFAULT_CONFIG[key];
    
    // Parse the stored value
    const parsed = JSON.parse(storedValue);
    
    // Handle each config key separately with proper type checking
    switch (key) {
      case 'videoFormat':
        // Check if the value is a valid video format
        if (parsed === 'mp4' || parsed === 'webm') {
          return parsed as ConfigValues[K];
        }
        return DEFAULT_CONFIG.videoFormat as ConfigValues[K];
        
      case 'robotAddress':
        // Basic validation for robot address
        if (typeof parsed === 'string' && (
          parsed.startsWith('ws://') || 
          parsed.startsWith('wss://') || 
          parsed.startsWith('http://') || 
          parsed.startsWith('https://') ||
          /^[0-9\.]+$/.test(parsed) || // IP without protocol
          parsed.includes('.') // domain without protocol
        )) {
          return parsed as ConfigValues[K];
        }
        return DEFAULT_CONFIG.robotAddress as ConfigValues[K];
        
      case 'overlayColor':
        // Check if the value is a valid overlay color
        if (
          parsed === 'white' ||
          parsed === 'black' ||
          parsed === 'red' ||
          parsed === 'purple' ||
          parsed === 'blue' ||
          parsed === 'green'
        ) {
          return parsed as ConfigValues[K];
        }
        return DEFAULT_CONFIG.overlayColor as ConfigValues[K];

      case 'gamepadMappings':
        // Validate gamepad mappings object
        if (typeof parsed === 'object' && parsed !== null) {
          return parsed as ConfigValues[K];
        }
        return DEFAULT_CONFIG.gamepadMappings as ConfigValues[K];

      case 'gamepadAxisMappings':
        // Validate gamepad axis mappings object
        if (typeof parsed === 'object' && parsed !== null) {
          return parsed as ConfigValues[K];