discourse/lib/topic_creator.rb

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# frozen_string_literal: true
class TopicCreator
attr_reader :user, :guardian, :opts
include HasErrors
def self.create(user, guardian, opts)
self.new(user, guardian, opts).create
end
def initialize(user, guardian, opts)
@user = user
@guardian = guardian
@opts = opts
@added_users = []
end
def valid?
topic = Topic.new(setup_topic_params)
# validate? will clear the error hash
# so we fire the validation event after
# this allows us to add errors
valid = topic.valid?
DiscourseEvent.trigger(:after_validate_topic, topic, self)
valid &&= topic.errors.empty?
add_errors_from(topic) unless valid
valid
end
def create
topic = Topic.new(setup_topic_params)
setup_tags(topic)
if fields = @opts[:custom_fields]
topic.custom_fields.merge!(fields)
end
DiscourseEvent.trigger(:before_create_topic, topic, self)
setup_auto_close_time(topic)
process_private_message(topic)
save_topic(topic)
create_warning(topic)
watch_topic(topic)
create_shared_draft(topic)
UserActionManager.topic_created(topic)
topic
end
private
def create_shared_draft(topic)
return unless @opts[:shared_draft] && @opts[:category].present?
SharedDraft.create(topic_id: topic.id, category_id: @opts[:category])
end
def create_warning(topic)
return unless @opts[:is_warning]
# We can only attach warnings to PMs
rollback_with!(topic, :warning_requires_pm) unless topic.private_message?
# Don't create it if there is more than one user
rollback_with!(topic, :too_many_users) if @added_users.size != 1
# Create a warning record
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UserWarning.create(topic: topic, user: @added_users.first, created_by: @user)
end
def watch_topic(topic)
unless @opts[:auto_track] == false
topic.notifier.watch_topic!(topic.user_id)
end
topic.reload.topic_allowed_users.each do |tau|
next if tau.user_id == -1 || tau.user_id == topic.user_id
topic.notifier.watch!(tau.user_id)
end
topic.reload.topic_allowed_groups.each do |topic_allowed_group|
topic_allowed_group.group.set_message_default_notification_levels!(topic)
end
end
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def setup_topic_params
@opts[:visible] = true if @opts[:visible].nil?
topic_params = {
title: @opts[:title],
user_id: @user.id,
last_post_user_id: @user.id,
visible: @opts[:visible]
}
[:subtype, :archetype, :meta_data, :import_mode].each do |key|
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topic_params[key] = @opts[key] if @opts[key].present?
end
if topic_params[:import_mode] && @opts[:views].to_i > 0
topic_params[:views] = @opts[:views].to_i
end
# Automatically give it a moderator warning subtype if specified
topic_params[:subtype] = TopicSubtype.moderator_warning if @opts[:is_warning]
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category = find_category
@guardian.ensure_can_create!(Topic, category) unless (@opts[:skip_validations] || @opts[:archetype] == Archetype.private_message)
if @opts[:category].present? && category.nil?
raise Discourse::InvalidParameters.new(:category)
end
topic_params[:category_id] = category.id if category.present?
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topic_params[:created_at] = convert_time(@opts[:created_at]) if @opts[:created_at].present?
topic_params[:pinned_at] = convert_time(@opts[:pinned_at]) if @opts[:pinned_at].present?
topic_params[:pinned_globally] = @opts[:pinned_globally] if @opts[:pinned_globally].present?
if SiteSetting.topic_featured_link_enabled && @opts[:featured_link].present? && @guardian.can_edit_featured_link?(topic_params[:category_id])
topic_params[:featured_link] = @opts[:featured_link]
end
topic_params
end
def convert_time(timestamp)
if timestamp.is_a?(Time)
timestamp
else
Time.zone.parse(timestamp.to_s)
end
end
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def find_category
@category ||= begin
# PM can't have a category
@opts.delete(:category) if @opts[:archetype].present? && @opts[:archetype] == Archetype.private_message
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if @opts[:shared_draft]
return Category.find(SiteSetting.shared_drafts_category)
end
if (@opts[:category].is_a? Integer) || (@opts[:category] =~ /^\d+$/)
Category.find_by(id: @opts[:category])
end
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end
end
def setup_tags(topic)
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if @opts[:tags].blank?
unless @guardian.is_staff? || !guardian.can_tag?(topic)
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category = find_category
if !DiscourseTagging.validate_min_required_tags_for_category(@guardian, topic, category) ||
!DiscourseTagging.validate_required_tags_from_group(@guardian, topic, category)
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rollback_from_errors!(topic)
end
end
else
valid_tags = DiscourseTagging.tag_topic_by_names(topic, @guardian, @opts[:tags])
rollback_from_errors!(topic) unless valid_tags
end
end
def setup_auto_close_time(topic)
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return unless @opts[:auto_close_time].present?
return unless @guardian.can_moderate?(topic)
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topic.set_auto_close(@opts[:auto_close_time], by_user: @user)
end
def process_private_message(topic)
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return unless @opts[:archetype] == Archetype.private_message
topic.subtype = TopicSubtype.user_to_user unless topic.subtype
unless @opts[:target_usernames].present? || @opts[:target_emails].present? || @opts[:target_group_names].present?
rollback_with!(topic, :no_user_selected)
end
if @opts[:target_emails].present? && !@guardian.can_send_private_messages_to_email? then
rollback_with!(topic, :reply_by_email_disabled)
end
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add_users(topic, @opts[:target_usernames])
add_emails(topic, @opts[:target_emails])
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add_groups(topic, @opts[:target_group_names])
if !@added_users.include?(user)
topic.topic_allowed_users.build(user_id: @user.id)
end
end
def save_topic(topic)
topic.disable_rate_limits! if @opts[:skip_validations]
unless topic.save(validate: !@opts[:skip_validations])
rollback_from_errors!(topic)
end
end
def add_users(topic, usernames)
return unless usernames
names = usernames.split(',').flatten
len = 0
User.includes(:user_option).where(username: names).find_each do |user|
check_can_send_permission!(topic, user)
@added_users << user
topic.topic_allowed_users.build(user_id: user.id)
len += 1
end
rollback_with!(topic, :target_user_not_found) unless len == names.length
end
def add_emails(topic, emails)
return unless emails
begin
emails = emails.split(',').flatten
len = 0
emails.each do |email|
display_name = email.split("@").first
if user = find_or_create_user(email, display_name)
if !@added_users.include?(user)
@added_users << user
topic.topic_allowed_users.build(user_id: user.id)
end
len += 1
end
end
ensure
rollback_with!(topic, :target_user_not_found) unless len == emails.length
end
end
def add_groups(topic, groups)
return unless groups
names = groups.split(',').flatten
len = 0
Group.where(name: names).each do |group|
check_can_send_permission!(topic, group)
topic.topic_allowed_groups.build(group_id: group.id)
len += 1
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group.update_columns(has_messages: true) unless group.has_messages
end
rollback_with!(topic, :target_group_not_found) unless len == names.length
end
def check_can_send_permission!(topic, obj)
unless @opts[:skip_validations] ||
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@guardian.can_send_private_message?(obj, notify_moderators: topic&.subtype == TopicSubtype.notify_moderators)
rollback_with!(topic, :cant_send_pm)
end
end
def find_or_create_user(email, display_name)
user = User.find_by_email(email)
if !user && SiteSetting.enable_staged_users
username = UserNameSuggester.sanitize_username(display_name) if display_name.present?
user = User.create!(
email: email,
username: UserNameSuggester.suggest(username.presence || email),
name: display_name.presence || User.suggest_name(email),
staged: true
)
end
user
end
end