discourse/app/services/group_message.rb

95 lines
2.9 KiB
Ruby

# frozen_string_literal: true
# GroupMessage sends a private message to a group.
# It will also avoid sending the same message repeatedly, which can happen with
# notifications to moderators when spam is detected.
#
# Options:
#
# user: (User) If the message is about a user, pass the user object.
# limit_once_per: (seconds) Limit sending the given type of message once every X seconds.
# The default is 24 hours. Set to false to always send the message.
class GroupMessage
include Rails.application.routes.url_helpers
RECENT_MESSAGE_PERIOD = 3.months
def self.create(group_name, message_type, opts = {})
GroupMessage.new(group_name, message_type, opts).create
end
def initialize(group_name, message_type, opts = {})
@group_name = group_name
@message_type = message_type
@opts = opts
end
def create
return false if sent_recently?
post = PostCreator.create(
Discourse.system_user,
target_group_names: [@group_name],
archetype: Archetype.private_message,
subtype: TopicSubtype.system_message,
title: I18n.t("system_messages.#{@message_type}.subject_template", message_params),
raw: I18n.t("system_messages.#{@message_type}.text_body_template", message_params)
)
remember_message_sent
post
end
def delete_previous!(respect_sent_recently: true, match_raw: true)
return false if respect_sent_recently && sent_recently?
posts = Post
.joins(topic: { topic_allowed_groups: :group })
.where(topic: {
posts_count: 1,
user_id: Discourse.system_user,
archetype: Archetype.private_message,
subtype: TopicSubtype.system_message,
title: I18n.t("system_messages.#{@message_type}.subject_template", message_params),
topic_allowed_groups: {
groups: { name: @group_name }
}
})
.where("posts.created_at > ?", RECENT_MESSAGE_PERIOD.ago)
if match_raw
posts = posts.where(raw: I18n.t("system_messages.#{@message_type}.text_body_template", message_params).rstrip)
end
posts.find_each do |post|
PostDestroyer.new(Discourse.system_user, post).destroy
end
end
def message_params
@message_params ||= begin
h = { base_url: Discourse.base_url }.merge(@opts[:message_params] || {})
if @opts[:user]
h.merge!(username: @opts[:user].username,
user_url: user_path(@opts[:user].username))
end
h
end
end
def sent_recently?
return false if @opts[:limit_once_per] == false
Discourse.redis.get(sent_recently_key).present?
end
# default is to send no more than once every 24 hours (24 * 60 * 60 = 86,400 seconds)
def remember_message_sent
Discourse.redis.setex(sent_recently_key, @opts[:limit_once_per].try(:to_i) || 86_400, 1) unless @opts[:limit_once_per] == false
end
def sent_recently_key
"grpmsg:#{@group_name}:#{@message_type}:#{@opts[:user] ? @opts[:user].username : ''}"
end
end