57 lines
1.6 KiB
Ruby
57 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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# Create a new notification while deleting previous versions of it.
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#
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# Constructor arguments:
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#
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# - type: The notification type. e.g. `Notification.types[:private_message]`
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# - previous_query_blk: A block with the query we'll use to find previous notifications.
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#
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# Need to call #set_precondition to configure this:
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#
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# - precondition_blk: A block that receives the mutated data and returns true if we have everything we need to consolidate.
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#
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# Need to call #set_mutations to configure this:
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#
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# - set_data_blk: A block that receives the notification data hash and mutates it, adding additional data needed for consolidation.
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module Notifications
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class DeletePreviousNotifications < ConsolidationPlan
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def initialize(type:, previous_query_blk:)
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@type = type
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@previous_query_blk = previous_query_blk
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end
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def can_consolidate_data?(notification)
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return false if notification.notification_type != type
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@data = consolidated_data(notification)
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precondition_blk.nil? || precondition_blk.call(@data, notification)
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end
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def consolidate_or_save!(notification)
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@data ||= consolidated_data(notification)
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return unless can_consolidate_data?(notification)
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notifications = user_notifications(notification, type)
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if previous_query_blk.present?
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notifications = previous_query_blk.call(notifications, data)
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end
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notification.data = data.to_json
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Notification.transaction do
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notifications.destroy_all
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notification.save!
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end
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notification
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end
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private
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attr_reader :type, :data, :precondition_blk, :previous_query_blk
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end
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end
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