using System;

namespace JD.LogService
{
    /// <summary>
    /// Helper to observe logging actions.
    /// </summary>
    public static class ObservedLogging
    {
        /// <summary>
        /// True if the action cause errors to be logged in the log.
        /// </summary>
        public static bool LogsError(ILogger wrappedLog, Action<ILogger> loggingAction)
        {
            bool hasLoggedEvent = false;
            ILogger observedLogger = Logger.FromAction(delegate(LogEvent @event)
            {
                wrappedLog.Log(@event);
                hasLoggedEvent |= @event.Category == LogCategory.Error;
            });

            loggingAction(observedLogger);
            return hasLoggedEvent;
        }
    }
}