// API v3 waitlist public interface declaration
syntax = "proto3";

// Waitlist partner API protos
package ext.maps.booking.partner.v3.waitlist;

// +------+------------------------------+----------------------------------+
// | Verb |          HTTP Path           |      Request/Response Body       |
// +------+------------------------------+----------------------------------+
// | GET  | /v3/HealthCheck              | -                                |
// |      |                              | -                                |
// +------+------------------------------+----------------------------------+
// | POST | /v3/BatchGetWaitlistEstimates| BatchGetWaitlistEstimatesRequest |
// |      |                              | BatchGetWaitlistEstimatesResponse|
// +------+------------------------------+----------------------------------+
// | POST | /v3/CreateWaitlistEntry      | CreateWaitlistEntryRequest       |
// |      |                              | CreateWaitlistEntryResponse      |
// +------+------------------------------+----------------------------------+
// | POST | /v3/GetWaitlistEntry         | GetWaitlistEntryRequest          |
// |      |                              | GetWaitlistEntryResponse         |
// +------+------------------------------+----------------------------------+
// | POST | /v3/DeleteWaitlistEntry      | DeleteWaitlistEntryRequest       |
// |      |                              | google.protobuf.Empty            |
// +------+------------------------------+----------------------------------+

// BatchGetWaitEstimates method

// Batch request for the wait estimates for the specified merchant, service and
// party sizes.
message BatchGetWaitEstimatesRequest {
  // Required. Partner-provided ID for the merchant.
  string merchant_id = 1;

  // Required. Partner-provided ID for the service.
  string service_id = 2;

  // Required. The different party sizes WaitEstimates are requested for.
  // WaitEstimates may differ with the number of people in the party.
  repeated int32 party_size = 3;
}

// Response for the BatchGetWaitEstimates RPC with the wait estimates of the
// specified merchant, service and party sizes.
message BatchGetWaitEstimatesResponse {
  // Required. A status for the waitlist that indicates whether new users can
  // join and what the reason is if they can’t join. If the waitlist is not
  // open, all other fields in the BatchGetWaitEstimatesResponse are expected to
  // be unset.
  WaitlistStatus waitlist_status = 1;

  // The wait estimates for each party size requested. The response should
  // contain exactly one wait estimate for each party size sent in the request.
  // If a party size is not available for some reason, prefer ommitting it
  // instead of returning an error so that the user will have some options to
  // choose from.
  repeated WaitEstimate wait_estimate = 2;
}

// A status for the waitlist that determines if new users can join and what
// the reason is if they can’t join.
enum WaitlistStatus {
  WAITLIST_STATUS_UNSPECIFIED = 0;
  // The waitlist is open and is accepting new users.
  OPEN = 1;
  // There is currently no wait and users should arrive at the merchant
  // without joining the waitlist.
  CLOSED_NO_WAIT = 2;
  // The waitlist is not currently accepting new users because it is full
  // or closed for other reasons.
  CLOSED_OTHER = 3;
}

// The range of time for the current estimated seat time for the user. Estimated
// seat time range must change over time when the merchant or partner updates
// their estimates.
message EstimatedSeatTimeRange {
  // Required. The lower bound for the range. Expressed as the number of seconds
  // since the Unix epoch.
  int64 start_seconds = 1;

  // Required. The upper bound for the range. Expressed as the number of seconds
  // since the Unix epoch. The end_seconds may be set to the same value as the
  // start_seconds.
  int64 end_seconds = 2;
}

// Contains fields measuring how long (in time or # of people) until the
// user is ready to leave the waitlist and be seated.
message WaitLength {
  // The count of how many other parties are ahead of the user in the waitlist.
  // parties_ahead_count must change over time as parties ahead
  // in the waitlist are seated or leave the waitlist. Either
  // parties_ahead_count or estimated_seat_time_range must be populated. Both
  // should be populated.
  int32 parties_ahead_count = 1;

  // The range of time that the user is estimated to be seated in. Either
  // parties_ahead_count or estimated_seat_time_range must be populated. Both
  // should be populated.
  EstimatedSeatTimeRange estimated_seat_time_range = 2;
}

// The wait estimate for a particular party size, merchant and service.
message WaitEstimate {
  // Required. The party size this wait estimate applies to.
  int32 party_size = 1;

  // Required. Contains fields measuring how long (in time or # of people) until
  // the user is ready to leave the waitlist and be seated.
  WaitLength wait_length = 2;
}

// CreateWaitlistEntry method

// Request for a user to join the waitlist.
//
// Reserve with Google may retry REST HTTP requests if no response is
// received. If the exact same CreateWaitlistEntry is received a second time,
// then the same CreateWaitlistResponse must be returned. A second waitlist
// entry must not be created.
message CreateWaitlistEntryRequest {
  // Required. Partner-provided ID for the merchant.
  string merchant_id = 1;

  // Required. Partner-provided ID for the service.
  string service_id = 2;

  // Required. The party size requested for the waitlist entry.
  int32 party_size = 3;

  // Required. Personal information of the user joining the waitlist.
  UserInformation user_information = 4;

  // A string from the user which contains any special requests or additional
  // information that they would like to notify the merchant about.
  // This will be populated when the user submits an additional request to
  // Reserve with Google. The partner can disable this functionality at the
  // service level by setting supports_additional_request to false in the
  // service feed.
  string additional_request = 5;

  // Required. Used to differentiate retries from separate requests. If the
  // exact same CreateWaitlistEntry is received a second time, (including
  // idempotency_token) then the same CreateWaitlistResponse must be returned.
  string idempotency_token = 6;
}

// Response for the CreateWaitlistEntry RPC with the waitlist entry ID or any
// failing business logic information.
message CreateWaitlistEntryResponse {
  // Unique partner-provided ID for the newly created entry in the waitlist.
  // Required if the waitlist entry was created successfully. Unique for all
  // time.
  string waitlist_entry_id = 1;

  WaitlistBusinessLogicFailure waitlist_business_logic_failure = 2;
}

// GetWaitlistEntry method

// Get the waitlist entry corresponding to the provided waitlist entry ID.
message GetWaitlistEntryRequest {
  // Required. The partner-provided waitlist entry ID to request info for.
  string waitlist_entry_id = 1;
}

// Response with the waitlist entry corresponding to the provided
// waitlist entry ID.
message GetWaitlistEntryResponse {
  // Required. The partner-provided information about a user’s waitlist entry.
  WaitlistEntry waitlist_entry = 1;
}

// DeleteWaitlistEntry method

// Cancel the user's entry in the waitlist.
message DeleteWaitlistEntryRequest {
  // Required. The partner-provided ID for the waitlist entry to be deleted.
  string waitlist_entry_id = 1;
}

// WaitlistEntry specification

enum WaitlistEntryState {
  WAITLIST_ENTRY_STATE_UNSPECIFIED = 0;
  // The waitlist entry was created and the user is currently waiting in the
  // waitlist.
  WAITING = 1;
  // The waitlist entry has been canceled. Cancellation for no-shows should use
  // the NO_SHOW state.
  CANCELED = 2;
  // The merchant is ready to serve the user.
  SERVICE_READY = 3;
  // The user has checked in with the host and is waiting to be seated.
  CHECKED_IN = 4;
  // The user has arrived and been seated by the merchant.
  SEATED = 5;
  // The user did not arrive at the merchant in time and lost their space.
  NO_SHOW = 6;
}

// The times at which the waitlist entry changed state.
message WaitlistEntryStateTimes {
  // Required. The time at which the waitlist entry was created.
  // In seconds since Unix epoch.
  int64 created_time_seconds = 1;

  // The time that the waitlist entry was cancelled. Must be populated
  // when the waitlist entry has been canceled but not before.
  // In seconds since Unix epoch.
  int64 canceled_time_seconds = 2;

  // The time the merchant was ready to serve the user.
  // service_readied_time_seconds must be populated after the merchant is
  // ready to serve the user but not before.
  // In seconds since Unix epoch.
  int64 service_readied_time_seconds = 3;

  // The actual time the user checked in with the host. checked_in_time must be
  // populated after the user has checked in with the merchant but not before.
  // In seconds since Unix epoch.
  int64 checked_in_time_seconds = 4;

  // The seated time for the user. seated_time_seconds must be populated
  // when the user has been seated but not before.
  // In seconds since Unix epoch.
  int64 seated_time_seconds = 5;

  // The time that the user was marked as a no-show. marked_no_show_time_seconds
  // must be populated when the user has been marked a no-show but not before.
  // In seconds since Unix epoch.
  int64 marked_no_show_time_seconds = 6;
}

// An entry in the waitlist.
message WaitlistEntry {
  // Required.
  WaitlistEntryState waitlist_entry_state = 1;

  // Required. The times at which the waitlist entry changed state.
  WaitlistEntryStateTimes waitlist_entry_state_times = 2;

  // Required. Contains fields measuring how long (in time or # of people) until
  // the user is ready to leave the waitlist and be seated.
  WaitEstimate wait_estimate = 3;
}

// WaitlistBusinessLogicFailure specification

// Status data that conveys why creating a waitlist entry fails.
// If there is a business logic error that is not captured here, please
// reach out to the Reserve with Google team to add it to this list. Other
// errors should be returned using standard HTTP error codes.
message WaitlistBusinessLogicFailure {
  enum Cause {
    // Default value: Don't use; amounts to an "unknown error"
    // Unexpected errors must be returned using standard HTTP error codes.
    CAUSE_UNSPECIFIED = 0;

    // The user has already booked a waitlist entry with the partner.
    EXISTING_WAITLIST_ENTRY = 1;

    // The requested party size is below the merchant’s minimum.
    BELOW_MIN_PARTY_SIZE = 2;

    // The requested party size is above the merchant’s maximum.
    ABOVE_MAX_PARTY_SIZE = 3;

    // The requested merchant is currently closed.
    MERCHANT_CLOSED = 4;

    // There is currently no wait and the user should walk in without joining
    // the waitlist.
    NO_WAIT = 5;

    // The waitlist is at capacity and new users are not being accepted at this
    // time.
    WAITLIST_FULL = 6;
  }
  // Required. The reason why the booking failed.
  Cause cause = 1;

  // This optional field is used for the partner to include additional
  // information for debugging purposes only.
  string description = 2;
}

// User specification

// Personal information about the person making a booking
message UserInformation {
  // Unique ID of the user to the partner, chosen by Reserve with Google.
  // (required)
  string user_id = 1;

  // Given name of the user (maximum 40 characters) (required)
  string given_name = 2;

  // Family name of the user (maximum 40 characters) (required)
  string family_name = 3;

  // Address of the user (optional)
  PostalAddress address = 4;

  // Phone number of the user (required)
  string telephone = 5;

  // Email address of the user (required)
  string email = 6;
}

// The postal address for a merchant.
message PostalAddress {
  // The country, e.g. "USA". (required)
  string country = 1;
  // The locality/city, e.g. "Mountain View". (required)
  string locality = 2;
  // The region/state/province, e.g. "CA". (required)
  string region = 3;
  // The postal code, e.g. "94043". (required)
  string postal_code = 4;
  // The street address, e.g. "1600 Amphitheatre Pkwy". (required)
  string street_address = 5;
}