metamaps--metamaps/app/models/topic.rb

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# frozen_string_literal: true
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class Topic < ApplicationRecord
ATTRS_TO_WATCH = %w[name desc link metacode_id permission defer_to_map_id].freeze
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include TopicsHelper
include Attachable
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belongs_to :user
belongs_to :defer_to_map, class_name: 'Map', foreign_key: 'defer_to_map_id'
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belongs_to :updated_by, class_name: 'User'
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has_many :synapses1, class_name: 'Synapse', foreign_key: 'topic1_id', dependent: :destroy
has_many :synapses2, class_name: 'Synapse', foreign_key: 'topic2_id', dependent: :destroy
has_many :topics1, through: :synapses2, source: :topic1
has_many :topics2, through: :synapses1, source: :topic2
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has_many :mappings, as: :mappable, dependent: :destroy
has_many :maps, through: :mappings
has_many :follows, as: :followed, dependent: :destroy
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has_many :followers, through: :follows, source: :user
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belongs_to :metacode
before_create :set_perm_by_defer
before_create :create_metamap?
after_create :after_created_async
after_update :after_updated
after_update :after_updated_async
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# before_destroy :before_destroyed
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validates :permission, presence: true
validates :permission, inclusion: { in: Perm::ISSIONS.map(&:to_s) }
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def synapses
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synapses1.or(synapses2)
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end
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def relatives
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topics1.or(topics2)
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end
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scope :relatives, (lambda do |topic_id = nil, user = nil|
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# should only see topics through *visible* synapses
# e.g. Topic A (commons) -> synapse (private) -> Topic B (commons) must be filtered out
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topic_ids = Pundit.policy_scope(user, Synapse.where(topic1_id: topic_id)).pluck(:topic2_id)
topic_ids += Pundit.policy_scope(user, Synapse.where(topic2_id: topic_id)).pluck(:topic1_id)
where(id: topic_ids.uniq)
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end)
delegate :name, to: :user, prefix: true
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def user_image
user.image.url
end
def map_count(user)
Pundit.policy_scope(user, maps).count
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end
def synapse_count(user)
Pundit.policy_scope(user, synapses).count
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end
def inmaps(user)
Pundit.policy_scope(user, maps).map(&:name)
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end
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def inmaps_links(user)
Pundit.policy_scope(user, maps).map(&:id)
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end
def as_json(options = {})
super(methods: %i[user_name user_image collaborator_ids])
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.merge(inmaps: inmaps(options[:user]), inmapsLinks: inmaps_links(options[:user]),
map_count: map_count(options[:user]), synapse_count: synapse_count(options[:user]))
end
def as_rdf
output = ''
output += %(d:topic_#{id} a mm:Topic ;\n)
output += %( rdfs:label "#{name}" ;\n)
output += %( rdfs:comment "#{desc}" ;\n) if desc.present?
output += %( foaf:homepage <#{link}> ;\n) if link.present?
output += %( mm:mapper d:mapper_#{user_id} ;\n)
output += %( mm:metacode "#{metacode.name}" ;\n)
output[-2] = '.' # change last ; to a .
output += %(\n)
output
end
def collaborator_ids
if defer_to_map
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defer_to_map.editors.reject { |mapper| mapper == user }.map(&:id)
else
[]
end
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end
def filtered
{
id: id,
permission: permission,
user_id: user_id,
collaborator_ids: collaborator_ids
}
end
# TODO: move to a decorator?
def synapses_csv(output_format = 'array')
output = []
synapses.each do |synapse|
if synapse.category == 'from-to'
if synapse.topic1_id == id
output << synapse.topic1_id.to_s + '->' + synapse.topic2_id.to_s
elsif synapse.topic2_id == id
output << synapse.topic2_id.to_s + '<-' + synapse.topic1_id.to_s
else
raise 'invalid synapse on topic in synapse_csv'
end
elsif synapse.category == 'both'
if synapse.topic1_id == id
output << synapse.topic1_id.to_s + '<->' + synapse.topic2_id.to_s
elsif synapse.topic2_id == id
output << synapse.topic2_id.to_s + '<->' + synapse.topic1_id.to_s
else
raise 'invalid synapse on topic in synapse_csv'
end
end
end
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return output if output_format == 'array'
return output.join('; ') if output_format == 'text'
raise 'invalid argument to synapses_csv'
end
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def topic_autocomplete_method
"Get: #{name}"
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end
protected
def set_perm_by_defer
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self.permission = defer_to_map.permission if defer_to_map
end
def create_metamap?
return unless (link == '') && (metacode.name == 'Metamap')
@map = Map.create(name: name, permission: permission, desc: '',
arranged: true, user_id: user_id)
self.link = Rails.application.routes.url_helpers
.map_url(host: ENV['MAILER_DEFAULT_URL'], id: @map.id)
end
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def after_created_async
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FollowService.follow(self, user, 'created')
# notify users following the topic creator
end
handle_asynchronously :after_created_async
def after_updated
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return unless ATTRS_TO_WATCH.any? { |k| changed_attributes.key?(k) }
new = attributes.select { |k| ATTRS_TO_WATCH.include?(k) }
old = changed_attributes.select { |k| ATTRS_TO_WATCH.include?(k) }
meta = new.merge(old) # we are prioritizing the old values, keeping them
meta['changed'] = changed_attributes.keys.select { |k| ATTRS_TO_WATCH.include?(k) }
Events::TopicUpdated.publish!(self, updated_by, meta)
maps.each do |map|
ActionCable.server.broadcast 'map_' + map.id.to_s, type: 'topicUpdated', id: id
end
end
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def after_updated_async
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return unless ATTRS_TO_WATCH.any? { |k| changed_attributes.key?(k) }
FollowService.follow(self, updated_by, 'contributed')
end
handle_asynchronously :after_updated_async
def before_destroyed
# hard to know how to do this yet, because the topic actually gets destroyed
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# NotificationService.notify_followers(self, 'topic_deleted', ?)
end
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end