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c5a70eca6e
We were looking up each mention one by one without any form of caching and that results in a problem somewhat similar to an N+1. When we have to do alot of DB lookups, it also increased the time spent in the V8 context which may eventually lead to a timeout. The change here makes it such that mention lookups only does a single DB query per post that happens outside of the V8 context.
115 lines
2.9 KiB
Ruby
115 lines
2.9 KiB
Ruby
require_dependency 'inline_oneboxer'
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module PrettyText
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module Helpers
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extend self
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# functions here are available to v8
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def t(key, opts)
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key = "js." + key
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unless opts
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I18n.t(key)
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else
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str = I18n.t(key, Hash[opts.entries].symbolize_keys).dup
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opts.each { |k, v| str.gsub!("{{#{k.to_s}}}", v.to_s) }
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str
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end
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end
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def avatar_template(username)
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return "" unless username
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user = User.find_by(username_lower: username.downcase)
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return "" unless user.present?
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# TODO: Add support for ES6 and call `avatar-template` directly
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UrlHelper.schemaless(UrlHelper.absolute(user.avatar_template))
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end
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def lookup_primary_user_group(username)
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return "" unless username
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user = User.find_by(username_lower: username.downcase)
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return "" unless user.present?
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user.primary_group.try(:name) || ""
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end
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# Overwrite this in a plugin to change how markdown can format
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# usernames on the server side
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def format_username(username)
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username
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end
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def category_hashtag_lookup(category_slug)
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if category = Category.query_from_hashtag_slug(category_slug)
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[category.url_with_id, category_slug]
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else
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nil
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end
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end
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def lookup_image_urls(urls)
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map = {}
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result = {}
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urls.each do |url|
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sha1 = Upload.sha1_from_short_url(url)
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map[url] = sha1 if sha1
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end
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if map.length > 0
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reverse_map = {}
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map.each do |key, value|
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reverse_map[value] ||= []
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reverse_map[value] << key
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end
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Upload.where(sha1: map.values).pluck(:sha1, :url).each do |row|
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sha1, url = row
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if short_urls = reverse_map[sha1]
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short_urls.each { |short_url| result[short_url] = url }
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end
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end
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end
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result
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end
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def lookup_inline_onebox(url, opts = {})
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InlineOneboxer.lookup(url, opts)
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end
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def get_topic_info(topic_id)
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return unless topic_id.is_a?(Integer)
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# TODO this only handles public topics, secured one do not get this
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topic = Topic.find_by(id: topic_id)
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if topic && Guardian.new.can_see?(topic)
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{
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title: Rack::Utils.escape_html(topic.title),
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href: topic.url
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}
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end
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end
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def category_tag_hashtag_lookup(text)
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tag_postfix = '::tag'
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is_tag = text =~ /#{tag_postfix}$/
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if !is_tag && category = Category.query_from_hashtag_slug(text)
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[category.url_with_id, text]
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elsif (!is_tag && tag = Tag.find_by(name: text)) ||
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(is_tag && tag = Tag.find_by(name: text.gsub!("#{tag_postfix}", '')))
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["#{Discourse.base_url}/tags/#{tag.name}", text]
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else
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nil
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end
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end
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def get_current_user(user_id)
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return unless user_id.is_a?(Integer)
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{ staff: User.where(id: user_id).where("moderator OR admin").exists? }
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end
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end
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end
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