Configuration of document expiry

[OldSneerJaw]

Feature Request

Description

Sync Gateway 2.0 introduced a new function to the sync function API: expiry. This function sets either the absolute date/time at which the document will expire or the relative number of seconds until it expires. Provide a declarative configuration option to specify when documents of a specific type should expire.

See Expiration Overview for more information on how document expiration behaves in Couchbase Server.

Examples

Specified as an absolute ISO 8601 date string:

{
  type: ...,
  channels: ...,
  propertyValidators: ...,
  expiry: '2022-12-31T23:59:59Z'
}

Specified as an absolute Unix time (i.e. number of seconds since 1970-01-01 at midnight UTC):

{
  type: ...,
  channels: ...,
  propertyValidators: ...,
  expiry: 1672531199
}

Specified as the relative number of seconds after the most recent add or replace operation (e.g. 14 days):

{
  type: ...,
  channels: ...,
  propertyValidators: ...,
  expiry: 1209600
}

Specified as an absolute JavaScript Date object:

{
  type: ...,
  channels: ...,
  propertyValidators: ...,
  expiry: new Date(Date.UTC(2019, 11, 31, 23, 59, 59, 999))
}

[dkichler]

Addressed by #304