149 lines
3.8 KiB
Ruby
149 lines
3.8 KiB
Ruby
class ClosetList < ApplicationRecord
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belongs_to :user
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has_many :hangers, class_name: 'ClosetHanger', foreign_key: 'list_id', dependent: :destroy
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validates :name, :presence => true, :uniqueness => {:scope => :user_id}
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validates :user, :presence => true
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validates :hangers_owned, :inclusion => {:in => [true, false], :message => "can't be blank"}
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delegate :log_trade_activity, to: :user
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scope :alphabetical, -> { order(:name) }
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scope :publicly_visible, -> {
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where(arel_table[:visibility].gteq(ClosetVisibility[:public].id))
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}
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scope :trading, -> {
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where(arel_table[:visibility].gteq(ClosetVisibility[:trading].id))
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}
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scope :visible_to, ->(user) {
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condition = arel_table[:visibility].gteq(ClosetVisibility[:public].id)
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condition = condition.or(arel_table[:user_id].eq(user.id)) if user
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where(condition)
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}
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after_save :sync_hangers_owned!
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after_save :log_trade_activity, if: :trading?
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after_destroy :log_trade_activity, if: :trading?
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def trading?
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visibility >= ClosetVisibility[:trading].id
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end
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def sync_hangers_owned!
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if hangers_owned_changed?
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hangers.each do |hanger|
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hanger.owned = hangers_owned
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hanger.save!
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end
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end
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end
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def try_non_null(method_name)
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send(method_name)
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end
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def self.preload_items(
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lists,
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hangers_scope: ClosetHanger.all,
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items_scope: Item.all,
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item_translations_scope: Item::Translation.all
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)
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# Preload the records we need. (This is like `includes`, but `includes`
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# always selects all fields for all records, and we give the caller the
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# opportunity to specify which fields it actually wants via scope!)
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hangers = hangers_scope.where(list_id: lists.map(&:id))
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# Group the records by relevant IDs.
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hangers_by_list_id = hangers.group_by(&:list_id)
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# Assign the preloaded records to the records they belong to. (This is like
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# doing e.g. i.translations = ..., but that's a database write - we
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# actually just want to set the `translations` field itself directly!
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# Hacky, ripped from how `ActiveRecord::Associations::Preloader` does it!)
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lists.each do |list|
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list.association(:hangers).target = hangers_by_list_id[list.id]
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end
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# Then, do similar preloading for the hangers and their items.
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ClosetHanger.preload_items(
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hangers,
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items_scope: items_scope,
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item_translations_scope: item_translations_scope,
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)
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end
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module VisibilityMethods
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delegate :trading?, to: :visibility_level
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def visibility_level
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ClosetVisibility.levels[visibility]
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end
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def trading_changed?
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return false unless visibility_changed?
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level_change = visibility_change.map { |v| ClosetVisibility.levels[v] }
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old_trading, new_trading = level_change.map(&:trading?)
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old_trading != new_trading
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end
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end
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include VisibilityMethods
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class Null
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include VisibilityMethods
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attr_reader :user
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def initialize(user)
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@user = user
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end
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def hangers
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user.closet_hangers.unlisted.where(owned: hangers_owned)
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end
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def hangers_owned?
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hangers_owned
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end
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def try_non_null(method_name)
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nil
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end
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end
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class NullOwned < Null
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def hangers_owned
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true
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end
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def visibility
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user.owned_closet_hangers_visibility
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end
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def visibility_changed?
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user.owned_closet_hangers_visibility_changed?
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end
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def visibility_change
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user.owned_closet_hangers_visibility_change
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end
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end
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class NullWanted < Null
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def hangers_owned
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false
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end
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def visibility
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user.wanted_closet_hangers_visibility
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end
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def visibility_changed?
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user.wanted_closet_hangers_visibility_changed?
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end
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def visibility_change
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user.wanted_closet_hangers_visibility_change
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end
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end
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end
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