Smart Scheduling AI+Calendly

public async Task<string> GetAvailability()

{

using var http = new HttpClient();

http.DefaultRequestHeaders.Authorization =

new System.Net.Http.Headers.AuthenticationHeaderValue(“Bearer”, _apiToken);

// Step 1: Get your active event types

var eventTypesResp = await http.GetStringAsync(

$”https://api.calendly.com/event_types?user={Uri.EscapeDataString(_userUri)}&active=true”);

var eventTypesDoc = JsonDocument.Parse(eventTypesResp);

var eventTypes = eventTypesDoc.RootElement.GetProperty(“collection”);

if (eventTypes.GetArrayLength() == 0)

return “I am available Monday-Friday, 9 AM – 5 PM ET.”;

string eventTypeUri = eventTypes[0].GetProperty(“uri”).GetString()!;

// Step 2: Query available times for the next 7 days

string startTime = DateTime.UtcNow.AddHours(1).ToString(“yyyy-MM-ddTHH:mm:ssZ”);

string endTime = DateTime.UtcNow.AddDays(7).ToString(“yyyy-MM-ddTHH:mm:ssZ”);

var availResp = await http.GetStringAsync(

$”https://api.calendly.com/event_type_available_times” +

$”?event_type={Uri.EscapeDataString(eventTypeUri)}” +

$”&start_time={startTime}&end_time={endTime}”);

var availDoc = JsonDocument.Parse(availResp);

var slots = availDoc.RootElement.GetProperty(“collection”);

// Step 3: Filter to business hours and group by day

var eastern = TimeZoneInfo.FindSystemTimeZoneById(“Eastern Standard Time”);

var slotsByDay = new Dictionary<string, List<string>>();

foreach (var slot in slots.EnumerateArray())

{

string startStr = slot.GetProperty(“start_time”).GetString()!;

var dtUtc = DateTime.Parse(startStr, null,

System.Globalization.DateTimeStyles.RoundtripKind);

var dtLocal = TimeZoneInfo.ConvertTimeFromUtc(dtUtc, eastern);

// Skip weekends and outside business hours

if (dtLocal.DayOfWeek == DayOfWeek.Saturday ||

dtLocal.DayOfWeek == DayOfWeek.Sunday) continue;

if (dtLocal.Hour < 9 || dtLocal.Hour >= 17) continue;

string day = dtLocal.ToString(“dddd, MMMM d”);

string time = dtLocal.ToString(“h:mm tt”);

if (!slotsByDay.ContainsKey(day))

slotsByDay[day] = new List<string>();

slotsByDay[day].Add(time);

}

// Step 4: Format as readable text

var sb = new StringBuilder();

sb.AppendLine(“Here are my available timeslots (Eastern Time):”);

sb.AppendLine();

foreach (var day in slotsByDay)

{

// Show a few representative times per day, not every 15-min slot

var times = day.Value;

var picks = new List<string> { times[0] };

if (times.Count > 2) picks.Add(times[times.Count / 2]);

if (times.Count > 1) picks.Add(times[^1]);

sb.AppendLine($” {day.Key}: {string.Join(“, “, picks.Distinct())}”);

}

return sb.ToString();

}