discourse/app/controllers/topics_controller.rb

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require_dependency 'topic_view'
require_dependency 'promotion'
require_dependency 'url_helper'
require_dependency 'topics_bulk_action'
require_dependency 'discourse_event'
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require_dependency 'rate_limiter'
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class TopicsController < ApplicationController
before_action :ensure_logged_in, only: [:timings,
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:destroy_timings,
:update,
:star,
:destroy,
:recover,
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:status,
:invite,
:mute,
:unmute,
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:set_notifications,
:move_posts,
:merge_topic,
:clear_pin,
:re_pin,
:status_update,
:timer,
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:bulk,
:reset_new,
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:change_post_owners,
:change_timestamps,
:archive_message,
:move_to_inbox,
:convert_topic,
:bookmark]
before_action :consider_user_for_promotion, only: :show
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skip_before_action :check_xhr, only: [:show, :unsubscribe, :feed]
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def id_for_slug
topic = Topic.find_by(slug: params[:slug].downcase)
guardian.ensure_can_see!(topic)
raise Discourse::NotFound unless topic
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render json: { slug: topic.slug, topic_id: topic.id, url: topic.url }
end
def show
if request.referer
flash["referer"] ||= request.referer[0..255]
end
# We'd like to migrate the wordpress feed to another url. This keeps up backwards compatibility with
# existing installs.
return wordpress if params[:best].present?
# work around people somehow sending in arrays,
# arrays are not supported
params[:page] = params[:page].to_i rescue 1
opts = params.slice(:username_filters, :filter, :page, :post_number, :show_deleted)
username_filters = opts[:username_filters]
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opts[:slow_platform] = true if slow_platform?
opts[:print] = true if params[:print].present?
opts[:username_filters] = username_filters.split(',') if username_filters.is_a?(String)
# Special case: a slug with a number in front should look by slug first before looking
# up that particular number
if params[:id] && params[:id] =~ /^\d+[^\d\\]+$/
topic = Topic.find_by(slug: params[:id].downcase)
return redirect_to_correct_topic(topic, opts[:post_number]) if topic
end
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if opts[:print]
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raise Discourse::InvalidAccess unless SiteSetting.max_prints_per_hour_per_user > 0
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begin
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RateLimiter.new(current_user, "print-topic-per-hour", SiteSetting.max_prints_per_hour_per_user, 1.hour).performed! unless @guardian.is_admin?
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rescue RateLimiter::LimitExceeded
render_json_error(I18n.t("rate_limiter.slow_down"))
end
end
begin
@topic_view = TopicView.new(params[:id] || params[:topic_id], current_user, opts)
rescue Discourse::NotFound
if params[:id]
topic = Topic.find_by(slug: params[:id].downcase)
return redirect_to_correct_topic(topic, opts[:post_number]) if topic
end
raise Discourse::NotFound
end
page = params[:page]
if (page < 0) || ((page - 1) * @topic_view.chunk_size > @topic_view.topic.highest_post_number)
raise Discourse::NotFound
end
discourse_expires_in 1.minute
if slugs_do_not_match || (!request.format.json? && params[:slug].nil?)
redirect_to_correct_topic(@topic_view.topic, opts[:post_number])
return
end
track_visit_to_topic
if should_track_visit_to_topic?
@topic_view.draft = Draft.get(current_user, @topic_view.draft_key, @topic_view.draft_sequence)
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end
unless @topic_view.topic.visible
response.headers['X-Robots-Tag'] = 'noindex'
end
canonical_url UrlHelper.absolute_without_cdn(@topic_view.canonical_path)
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perform_show_response
rescue Discourse::InvalidAccess => ex
if current_user
# If the user can't see the topic, clean up notifications for it.
Notification.remove_for(current_user.id, params[:topic_id])
end
if ex.obj && Topic === ex.obj && guardian.can_see_topic_if_not_deleted?(ex.obj)
rescue_discourse_actions(:not_found, 410)
return
end
raise ex
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end
def unsubscribe
if current_user.blank?
cookies[:destination_url] = request.fullpath
return redirect_to "/login-preferences"
end
@topic_view = TopicView.new(params[:topic_id], current_user)
if slugs_do_not_match || (!request.format.json? && params[:slug].blank?)
return redirect_to @topic_view.topic.unsubscribe_url, status: 301
end
tu = TopicUser.find_by(user_id: current_user.id, topic_id: params[:topic_id])
if tu && tu.notification_level > TopicUser.notification_levels[:regular]
tu.notification_level = TopicUser.notification_levels[:regular]
tu.save!
else
TopicUser.change(current_user.id, params[:topic_id].to_i, notification_level: TopicUser.notification_levels[:muted])
end
perform_show_response
end
def wordpress
params.require(:best)
params.require(:topic_id)
params.permit(:min_trust_level, :min_score, :min_replies, :bypass_trust_level_score, :only_moderator_liked)
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opts = {
best: params[:best].to_i,
min_trust_level: params[:min_trust_level] ? params[:min_trust_level].to_i : 1,
min_score: params[:min_score].to_i,
min_replies: params[:min_replies].to_i,
bypass_trust_level_score: params[:bypass_trust_level_score].to_i, # safe cause 0 means ignore
only_moderator_liked: params[:only_moderator_liked].to_s == "true"
}
@topic_view = TopicView.new(params[:topic_id], current_user, opts)
discourse_expires_in 1.minute
wordpress_serializer = TopicViewWordpressSerializer.new(@topic_view, scope: guardian, root: false)
render_json_dump(wordpress_serializer)
end
def posts
params.require(:topic_id)
params.permit(:post_ids)
@topic_view = TopicView.new(params[:topic_id], current_user, post_ids: params[:post_ids])
render_json_dump(TopicViewPostsSerializer.new(@topic_view, scope: guardian, root: false, include_raw: !!params[:include_raw]))
end
def excerpts
params.require(:topic_id)
params.require(:post_ids)
post_ids = params[:post_ids].map(&:to_i)
unless Array === post_ids
render_json_error("Expecting post_ids to contain a list of posts ids")
return
end
if post_ids.length > 100
render_json_error("Requested a chunk that is too big")
return
end
@topic = Topic.with_deleted.where(id: params[:topic_id]).first
guardian.ensure_can_see!(@topic)
@posts = Post.where(hidden: false, deleted_at: nil, topic_id: @topic.id)
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.where('posts.id in (?)', post_ids)
.joins("LEFT JOIN users u on u.id = posts.user_id")
.pluck(:id, :cooked, :username)
.map do |post_id, cooked, username|
{
post_id: post_id,
username: username,
excerpt: PrettyText.excerpt(cooked, 800, keep_emoji_images: true)
}
end
render json: @posts.to_json
end
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def destroy_timings
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PostTiming.destroy_for(current_user.id, [params[:topic_id].to_i])
render body: nil
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end
def update
topic = Topic.find_by(id: params[:topic_id])
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guardian.ensure_can_edit!(topic)
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changes = {}
PostRevisor.tracked_topic_fields.each_key do |f|
changes[f] = params[f] if params.has_key?(f)
end
changes.delete(:title) if topic.title == changes[:title]
changes.delete(:category_id) if topic.category_id.to_i == changes[:category_id].to_i
success = true
if changes.length > 0
first_post = topic.ordered_posts.first
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success = PostRevisor.new(first_post, topic).revise!(current_user, changes, validate_post: false)
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end
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# this is used to return the title to the client as it may have been changed by "TextCleaner"
success ? render_serialized(topic, BasicTopicSerializer) : render_json_error(topic)
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end
def feature_stats
params.require(:category_id)
category_id = params[:category_id].to_i
visible_topics = Topic.listable_topics.visible
render json: {
pinned_in_category_count: visible_topics.where(category_id: category_id).where(pinned_globally: false).where.not(pinned_at: nil).count,
pinned_globally_count: visible_topics.where(pinned_globally: true).where.not(pinned_at: nil).count,
banner_count: Topic.listable_topics.where(archetype: Archetype.banner).count,
}
end
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def status
params.require(:status)
params.require(:enabled)
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params.permit(:until)
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status = params[:status]
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topic_id = params[:topic_id].to_i
enabled = params[:enabled] == 'true'
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check_for_status_presence(:status, status)
@topic = Topic.find_by(id: topic_id)
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guardian.ensure_can_moderate!(@topic)
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@topic.update_status(status, enabled, current_user, until: params[:until])
render json: success_json.merge!(
topic_status_update: TopicTimerSerializer.new(
TopicTimer.find_by(topic: @topic), root: false
)
)
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end
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def mute
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toggle_mute
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end
def unmute
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toggle_mute
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end
def timer
params.permit(:time, :timezone_offset, :based_on_last_post, :category_id)
params.require(:status_type)
status_type =
begin
TopicTimer.types.fetch(params[:status_type].to_sym)
rescue
invalid_param(:status_type)
end
topic = Topic.find_by(id: params[:topic_id])
guardian.ensure_can_moderate!(topic)
options = {
by_user: current_user,
timezone_offset: params[:timezone_offset]&.to_i,
based_on_last_post: params[:based_on_last_post]
}
options.merge!(category_id: params[:category_id]) if !params[:category_id].blank?
topic_status_update = topic.set_or_create_timer(
status_type,
params[:time],
options
)
if topic.save
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render json: success_json.merge!(
execute_at: topic_status_update&.execute_at,
duration: topic_status_update&.duration,
based_on_last_post: topic_status_update&.based_on_last_post,
closed: topic.closed,
category_id: topic_status_update&.category_id
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)
else
render_json_error(topic)
end
end
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def make_banner
topic = Topic.find_by(id: params[:topic_id].to_i)
guardian.ensure_can_moderate!(topic)
topic.make_banner!(current_user)
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render body: nil
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end
def remove_banner
topic = Topic.find_by(id: params[:topic_id].to_i)
guardian.ensure_can_moderate!(topic)
topic.remove_banner!(current_user)
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render body: nil
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end
def remove_bookmarks
topic = Topic.find(params[:topic_id].to_i)
PostAction.joins(:post)
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.where(user_id: current_user.id)
.where('topic_id = ?', topic.id).each do |pa|
PostAction.remove_act(current_user, pa.post, PostActionType.types[:bookmark])
end
render body: nil
end
def archive_message
toggle_archive_message(true)
end
def move_to_inbox
toggle_archive_message(false)
end
def toggle_archive_message(archive)
topic = Topic.find(params[:id].to_i)
group_id = nil
group_ids = current_user.groups.pluck(:id)
if group_ids.present?
allowed_groups = topic.allowed_groups
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.where('topic_allowed_groups.group_id IN (?)', group_ids).pluck(:id)
allowed_groups.each do |id|
if archive
GroupArchivedMessage.archive!(id, topic.id)
group_id = id
else
GroupArchivedMessage.move_to_inbox!(id, topic.id)
end
end
end
if topic.allowed_users.include?(current_user)
if archive
UserArchivedMessage.archive!(current_user.id, topic.id)
else
UserArchivedMessage.move_to_inbox!(current_user.id, topic.id)
end
end
if group_id
name = Group.find_by(id: group_id).try(:name)
render_json_dump(group_name: name)
else
render body: nil
end
end
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def bookmark
topic = Topic.find(params[:topic_id].to_i)
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first_post = topic.ordered_posts.first
guardian.ensure_can_see!(first_post)
PostAction.act(current_user, first_post, PostActionType.types[:bookmark])
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render body: nil
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end
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def destroy
topic = Topic.find_by(id: params[:id])
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guardian.ensure_can_delete!(topic)
first_post = topic.ordered_posts.first
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PostDestroyer.new(current_user, first_post, context: params[:context]).destroy
render body: nil
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end
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def recover
topic = Topic.where(id: params[:topic_id]).with_deleted.first
guardian.ensure_can_recover_topic!(topic)
first_post = topic.posts.with_deleted.order(:post_number).first
PostDestroyer.new(current_user, first_post).recover
render body: nil
end
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def excerpt
render body: nil
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end
def remove_allowed_user
params.require(:username)
topic = Topic.find_by(id: params[:topic_id])
guardian.ensure_can_remove_allowed_users!(topic)
if topic.remove_allowed_user(current_user, params[:username])
render json: success_json
else
render json: failed_json, status: 422
end
end
def remove_allowed_group
params.require(:name)
topic = Topic.find_by(id: params[:topic_id])
guardian.ensure_can_remove_allowed_users!(topic)
if topic.remove_allowed_group(current_user, params[:name])
render json: success_json
else
render json: failed_json, status: 422
end
end
def invite_group
group = Group.find_by(name: params[:group])
raise Discourse::NotFound unless group
topic = Topic.find_by(id: params[:topic_id])
if topic.private_message?
guardian.ensure_can_send_private_message!(group)
topic.invite_group(current_user, group)
render_json_dump BasicGroupSerializer.new(group, scope: guardian, root: 'group')
else
render json: failed_json, status: 422
end
end
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def invite
username_or_email = params[:user] ? fetch_username : fetch_email
topic = Topic.find_by(id: params[:topic_id])
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groups = Group.lookup_groups(
group_ids: params[:group_ids],
group_names: params[:group_names]
)
guardian.ensure_can_invite_to!(topic, groups)
group_ids = groups.map(&:id)
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begin
if topic.invite(current_user, username_or_email, group_ids, params[:custom_message])
user = User.find_by_username_or_email(username_or_email)
if user
render_json_dump BasicUserSerializer.new(user, scope: guardian, root: 'user')
else
render json: success_json
end
else
render json: failed_json, status: 422
end
rescue Topic::UserExists => e
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render json: { errors: [e.message] }, status: 422
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end
end
def set_notifications
topic = Topic.find(params[:topic_id].to_i)
TopicUser.change(current_user, topic.id, notification_level: params[:notification_level].to_i)
render json: success_json
end
def merge_topic
params.require(:destination_topic_id)
topic = Topic.find_by(id: params[:topic_id])
guardian.ensure_can_move_posts!(topic)
dest_topic = topic.move_posts(current_user, topic.posts.pluck(:id), destination_topic_id: params[:destination_topic_id].to_i)
render_topic_changes(dest_topic)
end
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def move_posts
params.require(:post_ids)
params.require(:topic_id)
params.permit(:category_id)
topic = Topic.with_deleted.find_by(id: params[:topic_id])
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guardian.ensure_can_move_posts!(topic)
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dest_topic = move_posts_to_destination(topic)
render_topic_changes(dest_topic)
rescue ActiveRecord::RecordInvalid => ex
render_json_error(ex)
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end
def change_post_owners
params.require(:post_ids)
params.require(:topic_id)
params.require(:username)
guardian.ensure_can_change_post_owner!
begin
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PostOwnerChanger.new(post_ids: params[:post_ids].to_a,
topic_id: params[:topic_id].to_i,
new_owner: User.find_by(username: params[:username]),
acting_user: current_user).change_owner!
render json: success_json
rescue ArgumentError
render json: failed_json, status: 422
end
end
def change_timestamps
params.require(:topic_id)
params.require(:timestamp)
guardian.ensure_can_change_post_timestamps!
begin
TopicTimestampChanger.new(
topic_id: params[:topic_id].to_i,
timestamp: params[:timestamp].to_f
).change!
render json: success_json
rescue ActiveRecord::RecordInvalid, TopicTimestampChanger::InvalidTimestampError
render json: failed_json, status: 422
end
end
def clear_pin
topic = Topic.find_by(id: params[:topic_id].to_i)
guardian.ensure_can_see!(topic)
topic.clear_pin_for(current_user)
render body: nil
end
def re_pin
topic = Topic.find_by(id: params[:topic_id].to_i)
guardian.ensure_can_see!(topic)
topic.re_pin_for(current_user)
render body: nil
end
def timings
PostTiming.process_timings(
current_user,
topic_params[:topic_id].to_i,
topic_params[:topic_time].to_i,
(topic_params[:timings].to_h || {}).map { |post_number, t| [post_number.to_i, t.to_i] },
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mobile: view_context.mobile_view?
)
render body: nil
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end
def feed
@topic_view = TopicView.new(params[:topic_id])
discourse_expires_in 1.minute
render 'topics/show', formats: [:rss]
end
def bulk
if params[:topic_ids].present?
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topic_ids = params[:topic_ids].map { |t| t.to_i }
elsif params[:filter] == 'unread'
tq = TopicQuery.new(current_user)
topics = TopicQuery.unread_filter(tq.joined_topic_user, current_user.id, staff: guardian.is_staff?).listable_topics
topics = topics.where('category_id = ?', params[:category_id]) if params[:category_id]
topic_ids = topics.pluck(:id)
else
raise ActionController::ParameterMissing.new(:topic_ids)
end
operation = params.require(:operation)
operation.permit!
operation = operation.to_h.symbolize_keys
raise ActionController::ParameterMissing.new(:operation_type) if operation[:type].blank?
operator = TopicsBulkAction.new(current_user, topic_ids, operation, group: operation[:group])
changed_topic_ids = operator.perform!
render_json_dump topic_ids: changed_topic_ids
end
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def reset_new
current_user.user_stat.update_column(:new_since, Time.now)
render body: nil
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end
def convert_topic
params.require(:id)
params.require(:type)
topic = Topic.find_by(id: params[:id])
guardian.ensure_can_convert_topic!(topic)
if params[:type] == "public"
converted_topic = topic.convert_to_public_topic(current_user)
else
converted_topic = topic.convert_to_private_message(current_user)
end
render_topic_changes(converted_topic)
rescue ActiveRecord::RecordInvalid => ex
render_json_error(ex)
end
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private
def topic_params
params.permit(
:topic_id,
:topic_time,
timings: {}
)
end
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def toggle_mute
@topic = Topic.find_by(id: params[:topic_id].to_i)
guardian.ensure_can_see!(@topic)
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@topic.toggle_mute(current_user)
render body: nil
end
def consider_user_for_promotion
Promotion.new(current_user).review if current_user.present?
end
def slugs_do_not_match
params[:slug] && @topic_view.topic.slug != params[:slug]
end
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def redirect_to_correct_topic(topic, post_number = nil)
url = topic.relative_url
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url << "/#{post_number}" if post_number.to_i > 0
url << ".json" if request.format.json?
page = params[:page]
url << "?page=#{page}" if page != 0
redirect_to url, status: 301
end
def track_visit_to_topic
topic_id = @topic_view.topic.id
ip = request.remote_ip
user_id = (current_user.id if current_user)
track_visit = should_track_visit_to_topic?
Scheduler::Defer.later "Track Link" do
IncomingLink.add(
referer: request.referer || flash[:referer],
host: request.host,
current_user: current_user,
topic_id: @topic_view.topic.id,
post_number: params[:post_number],
username: request['u'],
ip_address: request.remote_ip
)
end unless request.format.json?
Scheduler::Defer.later "Track Visit" do
TopicViewItem.add(topic_id, ip, user_id)
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TopicUser.track_visit!(topic_id, user_id) if track_visit
end
end
def should_track_visit_to_topic?
!!((!request.format.json? || params[:track_visit]) && current_user)
end
def perform_show_response
if request.head?
head :ok
return
end
topic_view_serializer = TopicViewSerializer.new(@topic_view, scope: guardian, root: false, include_raw: !!params[:include_raw])
respond_to do |format|
format.html do
@description_meta = @topic_view.topic.excerpt || @topic_view.summary
store_preloaded("topic_#{@topic_view.topic.id}", MultiJson.dump(topic_view_serializer))
render :show
end
format.json do
render_json_dump(topic_view_serializer)
end
end
end
def render_topic_changes(dest_topic)
if dest_topic.present?
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render json: { success: true, url: dest_topic.relative_url }
else
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render json: { success: false }
end
end
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def move_posts_to_destination(topic)
args = {}
args[:title] = params[:title] if params[:title].present?
args[:destination_topic_id] = params[:destination_topic_id].to_i if params[:destination_topic_id].present?
args[:category_id] = params[:category_id].to_i if params[:category_id].present?
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topic.move_posts(current_user, post_ids_including_replies, args)
end
def check_for_status_presence(key, attr)
invalid_param(key) unless %w(pinned pinned_globally visible closed archived).include?(attr)
end
def invalid_param(key)
raise Discourse::InvalidParameters.new(key.to_sym)
end
def fetch_username
params.require(:user)
params[:user]
end
def fetch_email
params.require(:email)
params[:email]
end
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end