Module: Comfy::Admin::Meetalendar::MeetupsCalendarSyncer

Defined in:
app/models/comfy/admin/meetalendar/meetups_calendar_syncer.rb

Class Method Summary collapse

Class Method Details

.authorize ⇒ Object 



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# File 'app/models/comfy/admin/meetalendar/meetups_calendar_syncer.rb', line 38

def self.authorize
  authorizer = self.prepare_authorizer
  user_id = "default"
  credentials = authorizer.get_credentials user_id

  if credentials.nil?
    Rails.logger.error "Authorization failed as no google calendar api credentials are present."
    raise ::ActiveResource::UnauthorizedAccess, "Please go to: <host>/admin/meetups in the admin interface of the website and renew the authorization of the calendar api."
  end
  credentials
end

.authorize_and_remember(key_code) ⇒ Object 



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# File 'app/models/comfy/admin/meetalendar/meetups_calendar_syncer.rb', line 26

def self.authorize_and_remember(key_code)
  authorizer = self.prepare_authorizer
  user_id = "default"

  begin
    authorizer.get_and_store_credentials_from_code(user_id: user_id, code: key_code, base_url: GOOGLE_CALENDAR_AUTH_OOB_URI)
  rescue => exception
    Rails.logger.error "Authorization of google calendar api failed with exception: #{exception.message}"
    raise ::ActiveResource::UnauthorizedAccess, "Authorization at google calendar failed."
  end
end

.gather_selected_events(time_now) ⇒ Object 



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# File 'app/models/comfy/admin/meetalendar/meetups_calendar_syncer.rb', line 102

def self.gather_selected_events(time_now)
  @meetups = MeetupGroup.all
  group_ids = @meetups.map{ |meetup| meetup.group_id }
  group_ids_approved_cities = @meetups.map{|meetup| ["#{meetup.group_id}", meetup.approved_cities.downcase.split(%r{,\s*})]}.to_h

  request_result = Comfy::Admin::Meetalendar::MeetupsCalendarSyncer.get_path_authorized("/find/upcoming_events", {"page": 200})

  upcoming_events = request_result.nil? || request_result.empty? ? [] : request_result.dig("events")
  selected_groups_upcoming_events = upcoming_events.select{|event| group_ids.include?(event.dig("group", "id"))}

  upcoming_events_of_groups = selected_groups_upcoming_events.select do |event|
    selected_group_has_approved_cities = !group_ids_approved_cities.dig("#{event.dig("group", "id")}").empty?

    event_has_group = !event.dig("group").nil?
    events_group_id_is_in_selected_group_ids = group_ids.include?(event.dig("group", "id"))

    event_has_no_venue = event.dig("venue").nil?
    event_has_venue = !event.dig("venue").nil?

    event_venue_in_approved_cities = !selected_group_has_approved_cities ? true : group_ids_approved_cities.dig("#{event.dig("group", "id")}").include?(event.dig('venue', 'city').to_s.downcase)

    !selected_group_has_approved_cities ||
      (selected_group_has_approved_cities &&
      event_has_group && events_group_id_is_in_selected_group_ids &&
      (event_has_no_venue || (event_has_venue && event_venue_in_approved_cities)))
  end

  grouped_upcoming_events = upcoming_events_of_groups.group_by{|event| event.dig("group", "id")}
  limited_upcoming_events = grouped_upcoming_events.map{|k, v| v.select{|event| Time.at(Rational(event.dig("time").to_i, 1000)) > time_now}}.first
end

.get_authorization_url ⇒ Object 



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# File 'app/models/comfy/admin/meetalendar/meetups_calendar_syncer.rb', line 22

def self.get_authorization_url
  self.prepare_authorizer.get_authorization_url base_url: GOOGLE_CALENDAR_AUTH_OOB_URI
end

.get_path_authorized(path, args = {}) ⇒ Object 



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# File 'app/models/comfy/admin/meetalendar/meetups_calendar_syncer.rb', line 50

def self.get_path_authorized(path, args = {})
  return_hash = {}
  client = HTTPClient.new
  token_store = Google::Auth::Stores::DbTokenStore.new
  loaded_token = token_store.load("meetup")
  if loaded_token.nil?
    Rails.logger.error "Authorization failed as no currently authorized meetup api token was present."
    raise ::ActiveResource::UnauthorizedAccess, "To access this path you need to have authenticated the Meetup API successfully."
    parsed_path = {}.to_s
  else
    # try
    current_tokens = JSON.parse(loaded_token)
    request_uri = "https://api.meetup.com" + path.to_s
    request_query_args = args.merge({"access_token" => (current_tokens["access_token"])})
    result = client.request("GET", request_uri, request_query_args)

    if result.nil? || result.status == Rack::Utils::SYMBOL_TO_STATUS_CODE[:unauthorized]
      meetup_credentials = ::MEETALENDAR_CREDENTIALS_MEETUP
      request_uri = "https://secure.meetup.com/oauth2/access"
      request_query_args = {"client_id": meetup_credentials["client_id"], "client_secret": meetup_credentials["client_secret"], "grant_type": "refresh_token", "refresh_token": "#{current_tokens["refresh_token"]}"}
      post_return = client.post_content(request_uri, request_query_args)

      if post_return.nil? || post_return.status == Rack::Utils::SYMBOL_TO_STATUS_CODE[:unauthorized]
        Rails.logger.error "Authorization with current token failed and token could not be refreshed. Was authorization to meetup api revoked?"
        raise ::ActiveResource::UnauthorizedAccess, "To access this path you need to have authenticated the Meetup API successfully."
      else
        response = JSON.parse(post_return.to_s)
        token_store.store("meetup", {"auth_id": "meetup", "client_id": meetup_credentials["client_id"], "access_token": response["access_token"], "refresh_token": response["refresh_token"], "scope": "", "expiration_time_millis": response["expires_in"] * 1000}.to_json.to_s)

        # retry with refreshed token
        current_tokens = JSON.parse(loaded_token)
        request_uri = "https://api.meetup.com" + path.to_s
        request_query_args = args.merge({"access_token" => (current_tokens["access_token"])})
        result = client.request("GET", request_uri, request_query_args)

        if result.nil? || result.status != Rack::Utils::SYMBOL_TO_STATUS_CODE[:ok]
          # still no success
          Rails.logger.error "Authorization with current token failed, token was refreshed but authorization still fails. Was authorization to meetup api revoked?"
          raise ::ActiveResource::UnauthorizedAccess, "To access this path you need to have authenticated the Meetup API successfully."
        else
          parsed_path = JSON.parse(result&.body.nil? ? {}.to_s : result.body.to_s)
        end
      end

    else
      parsed_path = JSON.parse(result&.body.nil? ? {}.to_s : result.body.to_s)
    end
  end

  parsed_path
end

.prepare_authorizer ⇒ Object 



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# File 'app/models/comfy/admin/meetalendar/meetups_calendar_syncer.rb', line 16

def self.prepare_authorizer
  client_id = ::MEETALENDAR_CREDENTIALS_GOOGLE_CALENDAR_CLIENT_ID
  token_store = Google::Auth::Stores::DbTokenStore.new
  authorizer = Google::Auth::UserAuthorizer.new client_id, GOOGLE_CALENDAR_AUTH_SCOPE, token_store
end

.sync_meetups_to_calendar(listed_upcoming_events, calendar_id, time_now, time_in_future) ⇒ Object 



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# File 'app/models/comfy/admin/meetalendar/meetups_calendar_syncer.rb', line 133

def self.sync_meetups_to_calendar(listed_upcoming_events, calendar_id, time_now, time_in_future)
  calendar_service = Google::Apis::CalendarV3::CalendarService.new
  calendar_service.client_options.application_name = GOOGLE_CALENDAR_AUTH_APPLICATION_NAME
  calendar_service.authorization = authorize

  begin
    all_future_google_calendar_events = calendar_service.list_events(calendar_id, {time_max: DateTime.parse(time_in_future.to_s).to_s, time_min: DateTime.parse(time_now.to_s).to_s})
  rescue => exception
      Rails.logger.error "An exception occurred while loading current events from the google calendar. Exception: #{exception.message}"
      raise ::ActiveResource::ClientError, "Could not load current events from the google calendar."
  end

  to_keep_event_gcal_ids = listed_upcoming_events.map{|mu_event| Digest::MD5.hexdigest(mu_event.dig('id').to_s)}
  to_delete_event_ids = all_future_google_calendar_events.items.map{|gcal_event| gcal_event.id}.select{|gcal_event_id| !to_keep_event_gcal_ids.include?(gcal_event_id)}

  to_delete_event_ids.each{ |event_id|
    begin
      calendar_service.delete_event(calendar_id, event_id)
    rescue => exception
        Rails.logger.error "An exception occurred while deleting unsubscribed events from the google calendar. Exception: #{exception.message}"
        raise ::ActiveResource::ClientError, "Could not delete unsubscribed events from the google calendar."
    end
  }

  listed_upcoming_events.each{ |event|
    if event.key?('venue')
      venue_name_adress = event['venue']['name'] != event['venue']['address_1'] ? "#{event['venue']['name']}, #{event['venue']['address_1']}" : "#{event['venue']['address_1']}"
      location = "#{venue_name_adress}, #{event['venue']['city']}, #{event['venue']['localized_country_name']}"
    else
      if event.key?('link')
        location = event['link'].to_s
      else
        location = ""
      end
    end

    description = event['description'].to_s + (defined?(event['link']) ? "\nLink: " + event['link'].to_s : "")
    start_date_time = DateTime.parse(Time.at(Rational(event['time'].to_i, 1000)).to_s).to_s
    end_date_time = DateTime.parse(Time.at(Rational(event['time'].to_i + event['duration'].to_i, 1000)).to_s).to_s

    new_event_hash = {
      id: Digest::MD5.hexdigest(event['id'].to_s),
      summary: event['name'].to_s,
      location: location,
      description: description,
      start: {
        date_time: start_date_time,
        time_zone: Time.zone.name
      },
      end: {
        date_time: end_date_time,
        time_zone: Time.zone.name
      },
    }

    new_event = Google::Apis::CalendarV3::Event.new(new_event_hash)
    begin
      calendar_service.update_event(calendar_id, new_event.id, new_event)
    rescue # TODO(Schau): If possible, figure out the exact exceptions to minimize "braodness of healing"
      begin
        calendar_service.insert_event(calendar_id, new_event)
      rescue => exception
          Rails.logger.error "An exception occurred while updating or inserting events into the google calendar. Exception: #{exception.message}"
          raise ::ActiveResource::ClientError, "Could not update or insert event into the google calendar."
      end
    end
  }
end