Move all events between two Google Calendars

move-calendar-events.scala

//> using toolkit default
//> using option -no-indent
import sttp.client4.quick.*
import util.chaining.*
import upickle.default.*
import sttp.model.MediaType

case class Event(
    id: String,
    summary: String = "<no summary>",
    // appears on occurrences of repeated events, these can't be moved
    recurringEventId: String = ""
) derives ReadWriter

case class EventsResponse(items: List[Event] = Nil, nextPageToken: String = "")
    derives ReadWriter

val fromCalendar = sys.env("FROM_CALENDAR_ID")
val toCalendar = sys.env("TO_CALENDAR_ID")

val apiKey = sys.env("GOOGLE_API_TOKEN")

var pageToken = None: Option[String]

while (pageToken != Some("")) {

  val response = quickRequest
    .get(
      uri"https://www.googleapis.com/calendar/v3/calendars/$fromCalendar/events"
        .param("pageToken", pageToken)
    )
    .auth
    .bearer(apiKey)
    .send()
    .body
    // .tap(os.write.over(os.pwd / "events.json", _))
    .pipe(read[EventsResponse](_))

  pageToken = Some(response.nextPageToken)

  val events = response.items
    .filter(_.recurringEventId.isEmpty)

  println(s"Found ${events.size} events")

  events.foreach { event =>
    println(s"Moving event ${event.summary} (${event.id})")

    quickRequest
      .post(
        uri"https://www.googleapis.com/calendar/v3/calendars/$fromCalendar/events/${event.id}/move?destination=$toCalendar"
      )
      .auth
      .bearer(apiKey)
      .contentType(MediaType.ApplicationJson)
      .body(write(event))
      .send()
      .body
      .pipe(read[Event](_))
      .tap(e => println(s"Moved event ${e.summary} (${e.id})"))

  }

}