Class: Webhookdb::Replicator::IcalendarCalendarV1

Inherits:
Base
  • Object
show all
Includes:
Appydays::Loggable
Defined in:
lib/webhookdb/replicator/icalendar_calendar_v1.rb

Defined Under Namespace

Classes: EventProcessor, Upserter

Constant Summary collapse

RECURRENCE_PROJECTION = 
5.years
CLEANUP_SERVICE_NAMES = 
["icalendar_event_v1"].freeze

Constants inherited from Base

Base::MAX_INDEX_NAME_LENGTH

Constants included from DBAdapter::ColumnTypes

DBAdapter::ColumnTypes::BIGINT, DBAdapter::ColumnTypes::BIGINT_ARRAY, DBAdapter::ColumnTypes::BOOLEAN, DBAdapter::ColumnTypes::COLUMN_TYPES, DBAdapter::ColumnTypes::DATE, DBAdapter::ColumnTypes::DECIMAL, DBAdapter::ColumnTypes::DOUBLE, DBAdapter::ColumnTypes::FLOAT, DBAdapter::ColumnTypes::INTEGER, DBAdapter::ColumnTypes::INTEGER_ARRAY, DBAdapter::ColumnTypes::OBJECT, DBAdapter::ColumnTypes::TEXT, DBAdapter::ColumnTypes::TEXT_ARRAY, DBAdapter::ColumnTypes::TIMESTAMP, DBAdapter::ColumnTypes::UUID

Instance Attribute Summary

Attributes inherited from Base

#service_integration

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#_any_subscriptions_to_notify?, #_backfill_state_change_fields, #_backfillers, #_clear_backfill_information, #_clear_webook_information, #_coalesce_excluded_on_update, #_enqueue_backfill_jobs, #_extra_index_specs, #_fetch_enrichment, #_find_dependency_candidate, #_notify_dependents, #_parallel_backfill, #_prepare_for_insert, #_publish_rowupsert, #_store_enrichment_body?, #_to_json, #_upsert_webhook, #_verify_backfill_err_msg, #_webhook_state_change_fields, #admin_dataset, #backfill, #backfill_not_supported_message, #calculate_and_backfill_state_machine, #calculate_backfill_state_machine, #calculate_dependency_state_machine_step, #calculate_preferred_create_state_machine, chunked_row_update_bounds, #clear_backfill_information, #clear_webhook_information, #create_table, #create_table_modification, #data_column, #dbadapter_table, #denormalized_columns, #descriptor, #dispatch_request_to, #enqueue_sync_targets, #enrichment_column, #ensure_all_columns, #ensure_all_columns_modification, #find_dependent, #find_dependent!, #indices, #initialize, #on_backfill_error, #on_dependency_webhook_upsert, #preferred_create_state_machine_method, #preprocess_headers_for_logging, #primary_key_column, #process_state_change, #process_webhooks_synchronously?, #qualified_table_sequel_identifier, #readonly_dataset, #remote_key_column, #requires_sequence?, #resource_name_plural, #resource_name_singular, #schema_and_table_symbols, #storable_columns, #synchronous_processing_response_body, #timestamp_column, #upsert_webhook_body, #verify_backfill_credentials, #webhook_endpoint, #webhook_response

Constructor Details

This class inherits a constructor from Webhookdb::Replicator::Base

Class Method Details

.descriptor ⇒ Webhookdb::Replicator::Descriptor

Returns:



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 18

def self.descriptor
  return Webhookdb::Replicator::Descriptor.new(
    name: "icalendar_calendar_v1",
    ctor: ->(sint) { Webhookdb::Replicator::IcalendarCalendarV1.new(sint) },
    feature_roles: [],
    resource_name_singular: "iCalendar Calendar",
    supports_webhooks: true,
    description: "Fetch and convert an icalendar format file into a schematized and queryable database table.",
    api_docs_url: "https://icalendar.org/",
  )
end

Instance Method Details

#_clean_ics_url(url) ⇒ Object

We get all sorts of strange urls, fix up what we can.



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 223

def _clean_ics_url(url)
  u = URI(url)
  # https://xyz.com:80 is invalid, set it to 443 which yields https://xyz.com
  u.port = 443 if u.scheme == "https" && u.port == 80
  return u.to_s
end

#_denormalized_columns ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 70

def _denormalized_columns
  col = Webhookdb::Replicator::Column
  return [
    col.new(:row_created_at, TIMESTAMP, index: true, optional: true, defaulter: :now),
    col.new(:row_updated_at, TIMESTAMP, index: true, optional: true, defaulter: :now),
    col.new(:last_synced_at, TIMESTAMP, index: true, optional: true),
    col.new(:ics_url, TEXT, converter: col.converter_gsub("^webcal", "https")),
    col.new(:event_count, INTEGER, optional: true),
    col.new(:feed_bytes, INTEGER, optional: true),
    col.new(:last_sync_duration_ms, INTEGER, optional: true),
  ]
end

#_handle_down_error(e, request_url:, calendar_external_id:) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 230

def _handle_down_error(e, request_url:, calendar_external_id:)
  case e
    when Down::TooManyRedirects
      response_status = 301
      response_body = "<too many redirects>"
    when Down::NotModified
      # Do not alert on 304, but do log
      self.logger.info("icalendar_fetch_not_modified", response_status: 304, request_url:, calendar_external_id:)
      return
    when Down::SSLError
      # Most SSL errors are transient and can be retried, but some are due to a long-term misconfiguration.
      # Handle these with an alert, like if we had a 404, which indicates a longer-term issue.
      is_fatal =
        # There doesn't appear to be a way to allow unsafe legacy content negotiation on a per-request basis,
        # it is compiled into OpenSSL (may be wrong about this).
        e.to_s.include?("unsafe legacy renegotiation disabled") ||
        # Certificate failures are not transient
        e.to_s.include?("certificate verify failed")
      if is_fatal
        response_status = 0
        response_body = e.to_s
      else
        self._handle_retryable_down_error!(e, request_url:, calendar_external_id:)
      end
    when Down::TimeoutError, Down::ConnectionError, Down::InvalidUrl, URI::InvalidURIError
      response_status = 0
      response_body = e.to_s
    when Down::ClientError
      raise e if e.response.nil?
      response_status = e.response.code.to_i
      self._handle_retryable_down_error!(e, request_url:, calendar_external_id:) if
        self._retryable_client_error?(e, request_url:)
      # These are all the errors we've seen, we can't do anything about.
      # In theory we should do this for ALL 4xx errors,
      # but we'd rather error on the WebhookDB side until we're sure
      # we want to ignore things.
      expected_errors = [
        400, 401, 402, 403, # Common access problems we can't do anything about
        404, 405, # Fundamental issues with the URL given
        409, 410, # More access problems
        417, # If someone uses an Outlook HTML calendar, fetch gives us a 417
        429, # Usually 429s are retried (as above), but in some cases they're not.
      ]
      # For most client errors, we can't do anything about it. For example,
      # and 'unshared' URL could result in a 401, 403, 404, or even a 405.
      # For now, other client errors, we can raise on,
      # in case it's something we can fix/work around.
      # For example, it's possible something like a 415 is a WebhookDB issue.
      raise e unless expected_errors.include?(response_status)
      response_body = e.response.body.to_s
    when Down::ServerError
      response_status = e.response.code.to_i
      response_body = e.response.body.to_s
    else
      response_body = nil
      response_status = nil
  end
  raise e if response_status.nil?
  loggable_body = response_body && response_body[..256]
  self.logger.warn("icalendar_fetch_error",
                   response_body: loggable_body, response_status:, request_url:, calendar_external_id:,)
  message = Webhookdb::Messages::ErrorIcalendarFetch.new(
    self.service_integration,
    calendar_external_id,
    response_status:,
    response_body:,
    request_url:,
    request_method: "GET",
  )
  self.service_integration.organization.alerting.dispatch_alert(message, separate_connection: false)
end

#_handle_retryable_down_error!(e, request_url:, calendar_external_id:) ⇒ Object

Raises:

  • (Amigo::Retry::OrDie) 


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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 313

def _handle_retryable_down_error!(e, request_url:, calendar_external_id:)
  # Retry on these, which are hopefully transient.
  # For now, if they aren't transient, die so we see the job.
  # We will probably need to do an alert if the retries on exhausted instead.
  retry_in = rand(4..60).minutes
  self.logger.debug(
    "icalendar_fetch_error_retry",
    response_status: e.respond_to?(:response) ? e.response&.code : 0,
    request_url:,
    calendar_external_id:,
    retry_at: Time.now + retry_in,
  )
  raise Amigo::Retry::OrDie.new(10, retry_in)
end

#_remote_key_column ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 66

def _remote_key_column
  return Webhookdb::Replicator::Column.new(:external_id, TEXT)
end

#_resource_and_event(request) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 87

def _resource_and_event(request)
  return request.body, nil
end

#_resource_to_data(resource) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 102

def _resource_to_data(resource, *)
  data = resource.dup
  # Remove the client-provided webhook fields.
  data.clear
  return data
end

#_retryable_client_error?(e, request_url:) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 302

def _retryable_client_error?(e, request_url:)
  code = e.response.code.to_i
  # This is a bad domain that returns 429 for most requests.
  # Tell the org admins it won't sync.
  return false if code == 429 && request_url.start_with?("https://ical.schedulestar.com")
  # Other 429s can be retried.
  return true if code == 429
  # Otherwise, handle the client error normally, by telling the org admins, or raising.
  return false
end

#_sync_row(row, dep, now:) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 190

def _sync_row(row, dep, now:)
  calendar_external_id = row.fetch(:external_id)
  begin
    request_url = self._clean_ics_url(row.fetch(:ics_url))
    io = Webhookdb::Http.chunked_download(request_url, rewindable: false)
  rescue Down::Error, URI::InvalidURIError => e
    self._handle_down_error(e, request_url:, calendar_external_id:)
    return
  end

  upserter = Upserter.new(dep.replicator, calendar_external_id, now:)
  processor = EventProcessor.new(io, upserter)
  processor.process
  # Delete all the extra replicator rows, and cancel all the rows that weren't upserted.
  dep.replicator.admin_dataset do |ds|
    ds = ds.where(calendar_external_id:)
    if (delete_condition = processor.delete_condition)
      ds.where(delete_condition).delete
    end
    # Update both the status, and set the data json to match.
    # Only update rows not already CANCELLED.
    ds = ds.exclude(Sequel[compound_identity: processor.upserted_identities])
    ds = ds.where(Sequel[status: nil] | ~Sequel[status: "CANCELLED"])
    ds.update(
      status: "CANCELLED",
      data: Sequel.lit('data || \'{"STATUS":{"v":"CANCELLED"}}\'::jsonb'),
      row_updated_at: now,
    )
  end
  return processor
end

#_timestamp_column_name ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 83

def _timestamp_column_name
  return :row_updated_at
end

#_update_where_expr ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 91

def _update_where_expr
  return self.qualified_table_sequel_identifier[:row_updated_at] < Sequel[:excluded][:row_updated_at]
end

#_upsert_update_expr(inserting, **_kwargs) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 95

def _upsert_update_expr(inserting, **_kwargs)
  update = super
  # Only set created_at if it's not set so the initial insert isn't modified.
  self._coalesce_excluded_on_update(update, [:row_created_at])
  return update
end

#_webhook_response(request) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 32

def _webhook_response(request)
  return Webhookdb::WebhookResponse.for_standard_secret(request, self.service_integration.webhook_secret)
end

#calculate_webhook_state_machine ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 36

def calculate_webhook_state_machine
  step = Webhookdb::Replicator::StateMachineStep.new
  if self.service_integration.webhook_secret.blank?
    self.service_integration.save_changes
    step.output = %(You are about to add support for replicating iCalendar (.ics) URLs into WebhookDB.

We have detailed instructions on this process
at https://docs.webhookdb.com/guides/icalendar/.

The first step is to generate a secret you will use for signing
API requests you send to WebhookDB. You can use '#{Webhookdb::Id.rand_enc(16)}'
or generate your own value.
Copy and paste or enter a new value, and press enter.)
    return step.secret_prompt("secret").webhook_secret(self.service_integration)
  end
  step.output = %(
All set! Here is the endpoint to send requests to
from your backend. Refer to https://docs.webhookdb.com/guides/icalendar/
for details on the format of the request:

#{self.webhook_endpoint}

The secret to use for signing is:

#{self.service_integration.webhook_secret}

#{self._query_help_output})
  return step.completed
end

#delete_data_for_external_id(external_id) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 137

def delete_data_for_external_id(external_id)
  relevant_integrations = self.service_integration.recursive_dependents.
    filter { |d| CLEANUP_SERVICE_NAMES.include?(d.service_name) }
  self.admin_dataset do |ds|
    ds.db.transaction do
      ds.where(external_id:).delete
      relevant_integrations.each do |sint|
        ds.db[sint.replicator.qualified_table_sequel_identifier].where(calendar_external_id: external_id).delete
      end
    end
  end
end

#documentation_url ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 15

def documentation_url = Webhookdb::Icalendar::DOCUMENTATION_URL

#rows_needing_sync(dataset, now: Time.now) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 132

def rows_needing_sync(dataset, now: Time.now)
  cutoff = now - Webhookdb::Icalendar.sync_period_hours.hours
  return dataset.where(Sequel[last_synced_at: nil] | Sequel.expr { last_synced_at < cutoff })
end

#sync_row(row) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 169

def sync_row(row)
  Appydays::Loggable.with_log_tags(icalendar_url: row.fetch(:ics_url)) do
    self.with_advisory_lock(row.fetch(:pk)) do
      start = Time.now
      now = Time.now
      if (dep = self.find_dependent("icalendar_event_v1"))
        processor = self._sync_row(row, dep, now:)
      end
      self.admin_dataset do |ds|
        ds.where(pk: row.fetch(:pk)).
          update(
            last_synced_at: now,
            event_count: processor&.upserted_identities&.count,
            feed_bytes: processor&.read_bytes,
            last_sync_duration_ms: (Time.now - start).in_milliseconds,
          )
      end
    end
  end
end

#upsert_has_deps? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 30

def upsert_has_deps? = true

#upsert_webhook(request) ⇒ Object 



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# File 'lib/webhookdb/replicator/icalendar_calendar_v1.rb', line 109

def upsert_webhook(request)
  request_type = request.body.fetch("type")
  external_id = request.body.fetch("external_id")
  case request_type
    when "SYNC"
      super(request)
      Webhookdb::Jobs::IcalendarSync.perform_async(self.service_integration.id, external_id)
      return
    when "DELETE"
      self.delete_data_for_external_id(external_id)
      return
    when "__WHDB_UNIT_TEST"
      unless Webhookdb::RACK_ENV == "test"
        raise "someone tried to use the special unit test google event type outside of unit tests"
      end
      return super(request)
    else
      raise ArgumentError, "Unknown request type: #{request_type}"
  end
end