CustomActionsPlugin.cs

using System.ComponentModel;
using Microsoft.SemanticKernel;
using Newtonsoft.Json;
using System.Text.Json;
using System.Linq;
using MailKit.Net.Smtp;
using MailKit.Security;
using MailKit;
using MimeKit;

/* Custom Actions Plugin: can be used to add actions to the assistant
    Exposed functions:
    - AddEventToCalendar: Add an event to the calendar.
    - SendEMail: Send an email to a recipient with a specified subject and body.
    - GetCurrentDateTime: Get the current date and time in YYYY-MM-DD format.
*/

namespace SemanticKernelConsoleCopilotDemo
{
    internal sealed class CustomActionsPlugin
    {   
        
        [KernelFunction, Description("Send an email to a recipient with a specified subject and body. Only one email can be sent at a time. ")]
        public static string SendEMail(
            [Description("The email address of the recipient. Just the email address, one email address only!")] string to, 
            [Description("Email subject")] string subject, 
            [Description("Email body")] string body) {

            var message = new MimeMessage ();
            message.From.Add (new MailboxAddress (ConfigurationSettings.GmailEmailSender, ConfigurationSettings.GmailEmailUsername));
            message.To.Add (new MailboxAddress (to, to));
            message.Subject = subject;

            message.Body = new TextPart ("plain") { Text = body };

            using (var client = new SmtpClient ()) {
                client.Connect("smtp.gmail.com", 465, SecureSocketOptions.SslOnConnect);
                client.Authenticate (ConfigurationSettings.GmailEmailUsername, ConfigurationSettings.GmailEmailAppPassword);
                client.Send (message);
                client.Disconnect (true);
                return "Email sent successfully!";
            }
        }

        [KernelFunction, Description("Add an event to the calendar in case adding a calendar event is requested from the end user. ")]
        public static string AddEventToCalendar(
            [Description("Title of the event")] string eventTitle,
            [Description("Description of the event")] string eventDescription, 
            [Description("Location of the event")]string eventLocation, 
            [Description("Start date and time of the event")]string eventStartDate, 
            [Description("End date and time of the event")]string eventEndDate) {
            
            // Add the event to the calendar: TODO, implement the logic here
                return "Event added to the calendar!";
        }



/*         [KernelFunction, Description("Get the current date and time in YYYY-MM-DD format. ")]
        public static string GetCurrentDateTime() {
            return System.DateTime.Now.ToString("yyyy-MM-dd");
        }

        [KernelFunction, Description("Get the current day of the week. ")]
        public static string GetCurrentWeekDay() {
            return System.DateTime.Now.DayOfWeek.ToString();
        }

        [KernelFunction, Description("Get the events from the calendar for the specified date.")]
        public static string[] CheckCalendarEventsForDate(string date) {
            // Check the calendar for events on the specified date
            var day = System.DateTime.Parse(date).Day;
            if (day % 2 == 0) {
                return new string[] { "Meeting with Mom 10:00 AM", "Lunch with Clare 1:00 PM" };
            } else {
                return new string[] {  };
            }            
        }

        [KernelFunction, Description("Get the weather for the specified location, optionally for the specified date.")]
        public static string GetWeatherForLocation(
            [Description("The location for which the weather is requested.")] string location,
            [Description("The date for which the weather is requested. Optinal, otherwise the current day is taken")] string date = "2024-01-01") {

            // Check if the date day is an odd or even day from the date provided
            var day = System.DateTime.Parse(date).Day;
            if (day % 2 == 0) {
                return "Weather for " + location + " is sunny.";
            } else {
                return "Weather for " + location + " is partly cloudy.";
            }
        } */


        public CustomActionsPlugin()
        {
          
        }

    }
}