discourse/app/services/badge_granter.rb

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class BadgeGranter
def initialize(badge, user, opts={})
@badge, @user, @opts = badge, user, opts
@granted_by = opts[:granted_by] || Discourse.system_user
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@post_id = opts[:post_id]
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end
def self.grant(badge, user, opts={})
BadgeGranter.new(badge, user, opts).grant
end
def grant
return if @granted_by and !Guardian.new(@granted_by).can_grant_badges?(@user)
find_by = { badge_id: @badge.id, user_id: @user.id }
if @badge.multiple_grant?
find_by[:post_id] = @post_id
end
user_badge = UserBadge.find_by(find_by)
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if user_badge.nil? || (@badge.multiple_grant? && @post_id.nil?)
UserBadge.transaction do
seq = 0
if @badge.multiple_grant?
seq = UserBadge.where(badge: @badge, user: @user).maximum(:seq)
seq = (seq || -1) + 1
end
user_badge = UserBadge.create!(badge: @badge,
user: @user,
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granted_by: @granted_by,
granted_at: Time.now,
post_id: @post_id,
seq: seq)
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if @granted_by != Discourse.system_user
StaffActionLogger.new(@granted_by).log_badge_grant(user_badge)
end
if SiteSetting.enable_badges?
I18n.with_locale(@user.effective_locale) do
notification = @user.notifications.create(
notification_type: Notification.types[:granted_badge],
data: { badge_id: @badge.id,
badge_name: @badge.display_name,
badge_slug: @badge.slug,
username: @user.username}.to_json
)
user_badge.update_attributes notification_id: notification.id
end
end
end
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end
user_badge
end
def self.revoke(user_badge, options={})
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UserBadge.transaction do
user_badge.destroy!
if options[:revoked_by]
StaffActionLogger.new(options[:revoked_by]).log_badge_revoke(user_badge)
end
# If the user's title is the same as the badge name, remove their title.
if user_badge.user.title == user_badge.badge.name
user_badge.user.title = nil
user_badge.user.save!
end
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end
end
def self.queue_badge_grant(type,opt)
return unless SiteSetting.enable_badges
payload = nil
case type
when Badge::Trigger::PostRevision
post = opt[:post]
payload = {
type: "PostRevision",
post_ids: [post.id]
}
when Badge::Trigger::UserChange
user = opt[:user]
payload = {
type: "UserChange",
user_ids: [user.id]
}
when Badge::Trigger::TrustLevelChange
user = opt[:user]
payload = {
type: "TrustLevelChange",
user_ids: [user.id]
}
when Badge::Trigger::PostAction
action = opt[:post_action]
payload = {
type: "PostAction",
post_ids: [action.post_id, action.related_post_id].compact!
}
end
$redis.lpush queue_key, payload.to_json if payload
end
def self.clear_queue!
$redis.del queue_key
end
def self.process_queue!
limit = 1000
items = []
while limit > 0 && item = $redis.lpop(queue_key)
items << JSON.parse(item)
limit -= 1
end
items = items.group_by{|i| i["type"]}
items.each do |type, list|
post_ids = list.map{|i| i["post_ids"]}.flatten.compact.uniq
user_ids = list.map{|i| i["user_ids"]}.flatten.compact.uniq
next unless post_ids.present? || user_ids.present?
find_by_type(type).each{ |badge|
backfill(badge, post_ids: post_ids, user_ids: user_ids)
}
end
end
def self.find_by_type(type)
id = "Badge::Trigger::#{type}".constantize
Badge.where(trigger: id)
end
def self.queue_key
"badge_queue".freeze
end
# Options:
# :target_posts - whether the badge targets posts
# :trigger - the Badge::Trigger id
def self.contract_checks!(sql, opts = {})
return unless sql.present?
if Badge::Trigger.uses_post_ids?(opts[:trigger])
raise("Contract violation:\nQuery triggers on posts, but does not reference the ':post_ids' array") unless sql.match(/:post_ids/)
raise "Contract violation:\nQuery triggers on posts, but references the ':user_ids' array" if sql.match(/:user_ids/)
end
if Badge::Trigger.uses_user_ids?(opts[:trigger])
raise "Contract violation:\nQuery triggers on users, but does not reference the ':user_ids' array" unless sql.match(/:user_ids/)
raise "Contract violation:\nQuery triggers on users, but references the ':post_ids' array" if sql.match(/:post_ids/)
end
if opts[:trigger] && !Badge::Trigger.is_none?(opts[:trigger])
raise "Contract violation:\nQuery is triggered, but does not reference the ':backfill' parameter.\n(Hint: if :backfill is TRUE, you should ignore the :post_ids/:user_ids)" unless sql.match(/:backfill/)
end
# TODO these three conditions have a lot of false negatives
if opts[:target_posts]
raise "Contract violation:\nQuery targets posts, but does not return a 'post_id' column" unless sql.match(/post_id/)
end
raise "Contract violation:\nQuery does not return a 'user_id' column" unless sql.match(/user_id/)
raise "Contract violation:\nQuery does not return a 'granted_at' column" unless sql.match(/granted_at/)
raise "Contract violation:\nQuery ends with a semicolon. Remove the semicolon; your sql will be used in a subquery." if sql.match(/;\s*\z/)
end
# Options:
# :target_posts - whether the badge targets posts
# :trigger - the Badge::Trigger id
# :explain - return the EXPLAIN query
def self.preview(sql, opts = {})
params = {user_ids: [], post_ids: [], backfill: true}
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BadgeGranter.contract_checks!(sql, opts)
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# hack to allow for params, otherwise sanitizer will trigger sprintf
count_sql = "SELECT COUNT(*) count FROM (#{sql}) q WHERE :backfill = :backfill"
grant_count = SqlBuilder.map_exec(OpenStruct, count_sql, params).first.count.to_i
grants_sql =
if opts[:target_posts]
"SELECT u.id, u.username, q.post_id, t.title, q.granted_at
FROM(#{sql}) q
JOIN users u on u.id = q.user_id
LEFT JOIN badge_posts p on p.id = q.post_id
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LEFT JOIN topics t on t.id = p.topic_id
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WHERE :backfill = :backfill
LIMIT 10"
else
"SELECT u.id, u.username, q.granted_at
FROM(#{sql}) q
JOIN users u on u.id = q.user_id
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WHERE :backfill = :backfill
LIMIT 10"
end
query_plan = nil
# HACK: active record is weird, force it to go down the sanitization path that cares not for % stuff
query_plan = ActiveRecord::Base.exec_sql("EXPLAIN #{sql} /*:backfill*/", params) if opts[:explain]
sample = SqlBuilder.map_exec(OpenStruct, grants_sql, params).map(&:to_h)
sample.each do |result|
raise "Query returned a non-existent user ID:\n#{result[:id]}" unless User.find(result[:id]).present?
raise "Query did not return a badge grant time\n(Try using 'current_timestamp granted_at')" unless result[:granted_at]
if opts[:target_posts]
raise "Query did not return a post ID" unless result[:post_id]
raise "Query returned a non-existent post ID:\n#{result[:post_id]}" unless Post.find(result[:post_id]).present?
end
end
{grant_count: grant_count, sample: sample, query_plan: query_plan}
rescue => e
{errors: e.message}
end
MAX_ITEMS_FOR_DELTA = 200
def self.backfill(badge, opts=nil)
return unless SiteSetting.enable_badges
return unless badge.query.present? && badge.enabled
post_ids = user_ids = nil
post_ids = opts[:post_ids] if opts
user_ids = opts[:user_ids] if opts
# safeguard fall back to full backfill if more than 200
if (post_ids && post_ids.length > MAX_ITEMS_FOR_DELTA) ||
(user_ids && user_ids.length > MAX_ITEMS_FOR_DELTA)
post_ids = nil
user_ids = nil
end
post_ids = nil unless post_ids.present?
user_ids = nil unless user_ids.present?
full_backfill = !user_ids && !post_ids
post_clause = badge.target_posts ? "AND (q.post_id = ub.post_id OR NOT :multiple_grant)" : ""
post_id_field = badge.target_posts ? "q.post_id" : "NULL"
sql = "DELETE FROM user_badges
WHERE id in (
SELECT ub.id
FROM user_badges ub
LEFT JOIN ( #{badge.query} ) q
ON q.user_id = ub.user_id
#{post_clause}
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WHERE ub.badge_id = :id AND q.user_id IS NULL
)"
Badge.exec_sql(sql, id: badge.id,
post_ids: [-1],
user_ids: [-2],
backfill: true,
multiple_grant: true # cheat here, cause we only run on backfill and are deleting
) if badge.auto_revoke && full_backfill
sql = " WITH w as (
INSERT INTO user_badges(badge_id, user_id, granted_at, granted_by_id, post_id)
SELECT :id, q.user_id, q.granted_at, -1, #{post_id_field}
FROM ( #{badge.query} ) q
LEFT JOIN user_badges ub ON
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ub.badge_id = :id AND ub.user_id = q.user_id
#{post_clause}
/*where*/
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RETURNING id, user_id, granted_at
)
select w.*, username FROM w
JOIN users u on u.id = w.user_id
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"
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builder = SqlBuilder.new(sql)
builder.where("ub.badge_id IS NULL AND q.user_id <> -1")
if (post_ids || user_ids) && !badge.query.include?(":backfill")
Rails.logger.warn "Your triggered badge query for #{badge.name} does not include the :backfill param, skipping!"
return
end
if (post_ids && !badge.query.include?(":post_ids"))
Rails.logger.warn "Your triggered badge query for #{badge.name} does not include the :post_ids param, skipping!"
return
end
if (user_ids && !badge.query.include?(":user_ids"))
Rails.logger.warn "Your triggered badge query for #{badge.name} does not include the :user_ids param, skipping!"
return
end
builder.map_exec(OpenStruct, id: badge.id,
multiple_grant: badge.multiple_grant,
backfill: full_backfill,
post_ids: post_ids || [-2],
user_ids: user_ids || [-2]).each do |row|
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# old bronze badges do not matter
next if badge.badge_type_id == BadgeType::Bronze and row.granted_at < 2.days.ago
notification = Notification.create!(
user_id: row.user_id,
notification_type: Notification.types[:granted_badge],
data: {
badge_id: badge.id,
badge_name: badge.name,
badge_slug: badge.slug,
username: row.username
}.to_json )
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Badge.exec_sql("UPDATE user_badges SET notification_id = :notification_id WHERE id = :id",
notification_id: notification.id,
id: row.id
)
end
badge.reset_grant_count!
end
def self.revoke_ungranted_titles!
Badge.exec_sql("UPDATE users SET title = ''
WHERE NOT title IS NULL AND
title <> '' AND
EXISTS (
SELECT 1
FROM user_profiles
WHERE user_id = users.id AND badge_granted_title
) AND
title NOT IN (
SELECT name
FROM badges
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WHERE allow_title AND enabled AND
badges.id IN (SELECT badge_id FROM user_badges ub where ub.user_id = users.id)
)
")
end
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end