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79 lines
2.7 KiB
Ruby
79 lines
2.7 KiB
Ruby
# frozen_string_literal: true
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class TopicGroup < ActiveRecord::Base
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belongs_to :group
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belongs_to :topic
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def self.update_last_read(user, topic_id, post_number)
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updated_groups = update_read_count(user, topic_id, post_number)
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create_topic_group(user, topic_id, post_number, updated_groups.map(&:group_id))
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TopicTrackingState.publish_read_indicator_on_read(topic_id, post_number, user.id)
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end
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def self.new_message_update(user, topic_id, post_number)
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updated_groups = update_read_count(user, topic_id, post_number)
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create_topic_group(user, topic_id, post_number, updated_groups.map(&:group_id))
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TopicTrackingState.publish_read_indicator_on_write(topic_id, post_number, user.id)
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end
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def self.update_read_count(user, topic_id, post_number)
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update_query = <<~SQL
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UPDATE topic_groups tg
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SET
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last_read_post_number = GREATEST(:post_number, tg.last_read_post_number),
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updated_at = :now
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FROM topic_allowed_groups tag
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INNER JOIN group_users gu ON gu.group_id = tag.group_id
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WHERE gu.user_id = :user_id
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AND tag.topic_id = :topic_id
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AND tg.topic_id = :topic_id
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RETURNING
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tg.group_id
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SQL
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updated_groups = DB.query(
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update_query,
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user_id: user.id, topic_id: topic_id, post_number: post_number, now: DateTime.now
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)
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end
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def self.create_topic_group(user, topic_id, post_number, updated_group_ids)
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query = <<~SQL
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INSERT INTO topic_groups (topic_id, group_id, last_read_post_number, created_at, updated_at)
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SELECT tag.topic_id, tag.group_id, :post_number, :now, :now
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FROM topic_allowed_groups tag
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INNER JOIN group_users gu ON gu.group_id = tag.group_id
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WHERE gu.user_id = :user_id
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AND tag.topic_id = :topic_id
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SQL
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query += 'AND NOT(tag.group_id IN (:already_updated_groups))' unless updated_group_ids.length.zero?
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query += <<~SQL
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ON CONFLICT(topic_id, group_id)
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DO UPDATE SET last_read_post_number = :post_number, created_at = :now, updated_at = :now
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SQL
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DB.exec(
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query,
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user_id: user.id, topic_id: topic_id, post_number: post_number, now: DateTime.now, already_updated_groups: updated_group_ids
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)
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end
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end
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# == Schema Information
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#
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# Table name: topic_groups
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#
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# id :bigint not null, primary key
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# group_id :integer not null
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# topic_id :integer not null
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# last_read_post_number :integer default(0), not null
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# created_at :datetime not null
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# updated_at :datetime not null
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#
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# Indexes
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#
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# index_topic_groups_on_group_id_and_topic_id (group_id,topic_id) UNIQUE
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#
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