192 lines
5.5 KiB
Ruby
192 lines
5.5 KiB
Ruby
require_dependency 'notification_levels'
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class CategoryUser < ActiveRecord::Base
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belongs_to :category
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belongs_to :user
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def self.lookup(user, level)
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self.where(user: user, notification_level: notification_levels[level])
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end
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def self.lookup_by_category(user, category)
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self.where(user: user, category: category)
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end
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def self.notification_levels
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NotificationLevels.all
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end
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def self.watching_levels
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[notification_levels[:watching], notification_levels[:watching_first_post]]
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end
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def self.batch_set(user, level, category_ids)
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records = CategoryUser.where(user: user, notification_level: notification_levels[level])
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old_ids = records.pluck(:category_id)
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changed = false
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category_ids = Category.where('id in (?)', category_ids).pluck(:id)
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remove = (old_ids - category_ids)
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if remove.present?
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records.where('category_id in (?)', remove).destroy_all
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changed = true
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end
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(category_ids - old_ids).each do |id|
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CategoryUser.create!(user: user, category_id: id, notification_level: notification_levels[level])
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changed = true
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end
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if changed
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auto_watch(user_id: user.id)
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auto_track(user_id: user.id)
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end
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changed
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end
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def self.set_notification_level_for_category(user, level, category_id)
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record = CategoryUser.where(user: user, category_id: category_id).first
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return if record && record.notification_level == level
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if record.present?
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record.notification_level = level
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record.save!
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else
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begin
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CategoryUser.create!(user: user, category_id: category_id, notification_level: level)
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rescue ActiveRecord::RecordNotUnique
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# does not matter
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end
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end
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auto_watch(user_id: user.id)
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auto_track(user_id: user.id)
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end
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def self.auto_track(opts = {})
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builder = DB.build <<~SQL
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UPDATE topic_users tu
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SET notification_level = :tracking,
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notifications_reason_id = :auto_track_category
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FROM topics t, category_users cu
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/*where*/
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SQL
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builder.where("tu.topic_id = t.id AND
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cu.category_id = t.category_id AND
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cu.user_id = tu.user_id AND
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cu.notification_level = :tracking AND
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tu.notification_level = :regular")
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if category_id = opts[:category_id]
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builder.where("t.category_id = :category_id", category_id: category_id)
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end
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if topic_id = opts[:topic_id]
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builder.where("tu.topic_id = :topic_id", topic_id: topic_id)
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end
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if user_id = opts[:user_id]
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builder.where("tu.user_id = :user_id", user_id: user_id)
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end
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builder.exec(
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tracking: notification_levels[:tracking],
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regular: notification_levels[:regular],
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auto_track_category: TopicUser.notification_reasons[:auto_track_category]
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)
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end
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def self.auto_watch(opts = {})
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builder = DB.build <<~SQL
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UPDATE topic_users tu
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SET notification_level =
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CASE WHEN should_track THEN :tracking
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WHEN should_watch THEN :watching
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ELSE notification_level
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END,
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notifications_reason_id =
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CASE WHEN should_track THEN null
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WHEN should_watch THEN :auto_watch_category
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ELSE notifications_reason_id
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END
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FROM (
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SELECT tu1.topic_id,
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tu1.user_id,
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CASE WHEN
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cu.user_id IS NULL AND tu1.notification_level = :watching AND tu1.notifications_reason_id = :auto_watch_category THEN true
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ELSE false
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END should_track,
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CASE WHEN
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cu.user_id IS NOT NULL AND tu1.notification_level in (:regular, :tracking) THEN true
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ELSE false
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END should_watch
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FROM topic_users tu1
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JOIN topics t ON t.id = tu1.topic_id
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LEFT JOIN category_users cu ON cu.category_id = t.category_id AND cu.user_id = tu1.user_id AND cu.notification_level = :watching
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/*where2*/
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) as X
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/*where*/
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SQL
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builder.where("X.topic_id = tu.topic_id AND X.user_id = tu.user_id")
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builder.where("should_watch OR should_track")
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if category_id = opts[:category_id]
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builder.where2("t.category_id = :category_id", category_id: category_id)
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end
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if topic_id = opts[:topic_id]
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builder.where("tu.topic_id = :topic_id", topic_id: topic_id)
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builder.where2("tu1.topic_id = :topic_id", topic_id: topic_id)
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end
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if user_id = opts[:user_id]
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builder.where("tu.user_id = :user_id", user_id: user_id)
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builder.where2("tu1.user_id = :user_id", user_id: user_id)
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end
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builder.exec(
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watching: notification_levels[:watching],
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tracking: notification_levels[:tracking],
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regular: notification_levels[:regular],
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auto_watch_category: TopicUser.notification_reasons[:auto_watch_category]
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)
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end
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def self.ensure_consistency!
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DB.exec <<~SQL
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DELETE FROM category_users
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WHERE user_id IN (
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SELECT cu.user_id FROM category_users cu
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LEFT JOIN users u ON u.id = cu.user_id
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WHERE u.id IS NULL
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)
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SQL
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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: category_users
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#
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# id :integer not null, primary key
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# category_id :integer not null
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# user_id :integer not null
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# notification_level :integer not null
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#
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# Indexes
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#
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# idx_category_users_u1 (user_id,category_id,notification_level) UNIQUE
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# idx_category_users_u2 (category_id,user_id,notification_level) UNIQUE
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#
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