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class Story < ApplicationRecord
belongs_to :user
belongs_to :domain, optional: true
belongs_to :merged_into_story,
:class_name => "Story",
:foreign_key => "merged_story_id",
:inverse_of => :merged_stories,
:optional => true
has_many :merged_stories,
:class_name => "Story",
:foreign_key => "merged_story_id",
:inverse_of => :merged_into_story,
:dependent => :nullify
has_many :taggings,
:autosave => true,
:dependent => :destroy
has_many :suggested_taggings, :dependent => :destroy
has_many :suggested_titles, :dependent => :destroy
has_many :suggested_tagging_times,
-> { group(:tag_id).select("count(*) as times, tag_id").order('times desc') },
:class_name => 'SuggestedTagging',
:inverse_of => :story
has_many :suggested_title_times,
-> { group(:title).select("count(*) as times, title").order('times desc') },
:class_name => 'SuggestedTitle',
:inverse_of => :story
has_many :comments,
:inverse_of => :story,
:dependent => :destroy
has_many :tags, -> { order('tags.is_media desc, tags.tag') }, :through => :taggings
has_many :votes, -> { where(:comment_id => nil) }, :inverse_of => :story
has_many :voters, -> { where('votes.comment_id' => nil) },
:through => :votes,
:source => :user
has_many :hidings, :class_name => 'HiddenStory', :inverse_of => :story, :dependent => :destroy
has_many :savings, :class_name => 'SavedStory', :inverse_of => :story, :dependent => :destroy
has_one :story_text, foreign_key: :id, dependent: :destroy, inverse_of: :story
scope :base, -> { includes(:tags).unmerged.not_deleted }
scope :deleted, -> { where(is_expired: true) }
scope :not_deleted, -> { where(is_expired: false) }
scope :unmerged, -> { where(:merged_story_id => nil) }
scope :positive_ranked, -> { where("score >= 0") }
scope :low_scoring, ->(max = 5) { where("score < ?", max) }
scope :front_page, -> { hottest.limit(StoriesPaginator::STORIES_PER_PAGE) }
scope :hottest, ->(user = nil, exclude_tags = nil) {
base.not_hidden_by(user)
.filter_tags(exclude_tags || [])
.positive_ranked
.order('hotness')
}
scope :recent, ->(user = nil, exclude_tags = nil) {
base.not_hidden_by(user)
.filter_tags(exclude_tags || [])
.low_scoring
.where("created_at >= ?", 10.days.ago)
.where.not(id: front_page.ids)
.order("stories.created_at DESC")
}
scope :filter_tags, ->(tags) {
tags.empty? ? all : where.not(
Tagging.select('TRUE')
.where('taggings.story_id = stories.id')
.where(tag_id: tags)
.arel
.exists
)
}
scope :filter_tags_for, ->(user) {
user.nil? ? all : where.not(
Tagging.joins(tag: :tag_filters)
.select('TRUE')
.where('taggings.story_id = stories.id')
.where(tag_filters: { user_id: user })
.arel
.exists
)
}
scope :hidden_by, ->(user) {
user.nil? ? none : joins(:hidings).merge(HiddenStory.by(user))
}
scope :not_hidden_by, ->(user) {
user.nil? ? all : where.not(
HiddenStory.select('TRUE')
.where(Arel.sql('hidden_stories.story_id = stories.id'))
.by(user)
.arel
.exists
)
}
scope :saved_by, ->(user) {
user.nil? ? none : joins(:savings).merge(SavedStory.by(user))
}
scope :to_tweet, -> {
hottest(nil, Tag.where(tag: 'meta').pluck(:id))
.where(twitter_id: nil)
.where("score >= 2")
.where("created_at >= ?", 2.days.ago)
.limit(10)
}
validates :title, length: { :in => 3..150 }
validates :description, length: { :maximum => (64 * 1024) }
validates :url, length: { :maximum => 250, :allow_nil => true }
validates :short_id, presence: true, length: { :maximum => 6 }
validates :markeddown_description, length: { :maximum => 16_777_215, :allow_nil => true }
validates :twitter_id, length: { :maximum => 20, :allow_nil => true }
validates_each :merged_story_id do |record, _attr, value|
if value.to_i == record.id
record.errors.add(:merge_story_short_id, "id cannot be itself.")
end
end
FLAGGABLE_DAYS = 14
# the lowest a score can go
FLAGGABLE_MIN_SCORE = -5
# after this many minutes old, a story cannot be edited
MAX_EDIT_MINS = (60 * 6)
# days a story is considered recent, for resubmitting
RECENT_DAYS = 30
# users needed to make similar suggestions go live
SUGGESTION_QUORUM = 2
# let a hot story linger for this many seconds
HOTNESS_WINDOW = 60 * 60 * 22
# drop these words from titles when making URLs
TITLE_DROP_WORDS = ["", "a", "an", "and", "but", "in", "of", "or", "that", "the", "to"].freeze
# URI.parse is not very lenient, so we can't use it
URL_RE = /\A(?<protocol>https?):\/\/(?<domain>([^\.\/]+\.)+[a-z]+)(?<port>:\d+)?(\/|\z)/i.freeze
# Dingbats, emoji, and other graphics https://www.unicode.org/charts/
GRAPHICS_RE = /[\u{0000}-\u{001F}\u{2190}-\u{27BF}\u{1F000}-\u{1F9FF}]/.freeze
attr_accessor :editing_from_suggestions, :editor, :fetching_ip, :is_hidden_by_cur_user,
:is_saved_by_cur_user, :moderation_reason, :previewing, :seen_previous, :vote
attr_writer :fetched_response
before_validation :assign_short_id_and_score, :on => :create
before_create :assign_initial_hotness
before_save :log_moderation
before_save :fix_bogus_chars
after_create :mark_submitter, :record_initial_upvote
after_save :update_merged_into_story_comments, :recalculate_hotness!
validate do
if self.url.present?
already_posted_recently?
check_not_tracking_domain
check_not_new_domain_from_new_user
errors.add(:url, "is not valid") unless url.match(URL_RE)
elsif self.description.to_s.strip == ""
errors.add(:description, "must contain text if no URL posted")
end
if self.title.starts_with?("Ask") && self.tags_a.include?('ask')
errors.add(:title, " starting 'Ask #{Rails.application.name}' or similar is redundant " <<
"with the ask tag.")
end
if self.title.match(GRAPHICS_RE)
errors.add(:title, " may not contain graphic codepoints")
end
if !errors.any? && self.url.blank?
self.user_is_author = true
end
check_tags
end
def already_posted_recently?
return false unless self.url.present? && self.new_record?
if most_recent_similar && most_recent_similar.is_recent?
errors.add(:url, "has already been submitted within the past #{RECENT_DAYS} days")
true
elsif most_recent_similar && self.user.is_new?
errors.add(:url, "cannot be resubmitted by new users")
true
else
false
end
end
def check_not_new_domain_from_new_user
return unless self.url.present? && self.new_record? && self.domain
if self.user && self.user.is_new? && self.domain.stories.not_deleted.count == 0
ModNote.tattle_on_story_domain!(self, "new user with new")
errors.add(:url, "is an unseen domain from a new user")
end
end
def check_not_tracking_domain
return unless self.url.present? && self.new_record? && self.domain
if self.domain.banned?
ModNote.tattle_on_story_domain!(self, "banned")
errors.add(:url, "is from banned domain #{self.domain.domain}: #{self.domain.banned_reason}")
elsif self.domain.is_tracker
ModNote.tattle_on_story_domain!(self, "tracking")
errors.add(:url, "is a link shortening or ad tracking domain")
end
end
# all stories with similar urls
def self.find_similar_by_url(url)
url = url.to_s.gsub('[', '\\[')
url = url.to_s.gsub(']', '\\]')
urls = [url.to_s.gsub(/(#.*)/, "")]
urls2 = [url.to_s.gsub(/(#.*)/, "")]
urls_with_trailing_pound = []
# https
urls.each do |u|
urls2.push u.gsub(/^http:\/\//i, "https://")
urls2.push u.gsub(/^https:\/\//i, "http://")
end
urls = urls2.uniq
# trailing slash or index.html
urls.each do |u|
u_without_slash = u.gsub(/\/+\z/, "")
urls2.push u_without_slash
urls2.push u_without_slash + "/"
urls2.push u_without_slash + "/index.htm"
urls2.push u_without_slash + "/index.html"
urls2.push u.gsub(/\/index.html?\z/, "")
end
urls = urls2.uniq
# www prefix
urls.each do |u|
urls2.push u.gsub(/^(https?:\/\/)www\d*\./i) {|_| $1 }
urls2.push u.gsub(/^(https?:\/\/)/i) {|_| "#{$1}www." }
end
urls = urls2.uniq
# trailing pound
urls.each do |u|
urls_with_trailing_pound.push u + "#"
end
# if a previous submission was moderated, return it to block it from being
# submitted again
Story
.where(:url => urls)
.or(Story.where("url RLIKE ?", urls_with_trailing_pound.join(".|")))
.where("is_expired = ? OR is_moderated = ?", false, true)
end
# doesn't include deleted/moderated/merged stories
def similar_stories
return [] unless self.url.present?
@_similar_stories ||= Story.find_similar_by_url(self.url).order("id DESC")
# do not include this story itself or any story merged into it
if self.id?
@_similar_stories = @_similar_stories.where.not(id: self.id)
.where('merged_story_id is null or merged_story_id != ?', self.id)
end
# do not include the story this one is merged into
if self.merged_story_id?
@_similar_stories = @_similar_stories.where('id != ?', self.merged_story_id)
end
@_similar_stories
end
def public_similar_stories
@_public_similar_stories ||= similar_stories.empty? ? [] : similar_stories.base
end
def most_recent_similar
similar_stories.first
end
def self.recalculate_all_hotnesses!
# do the front page first, since find_each can't take an order
Story.order("id DESC").limit(100).each(&:recalculate_hotness!)
Story.find_each(&:recalculate_hotness!)
true
end
def archive_url
"https://archive.md/#{CGI.escape(self.url)}"
end
def as_json(options = {})
h = [
:short_id,
:short_id_url,
:created_at,
:title,
:url,
:score,
:score,
:flags,
{ :comment_count => :comments_count },
{ :description => :markeddown_description },
:comments_url,
{ :submitter_user => :user },
{ :tags => self.tags.map(&:tag).sort },
]
if options && options[:with_comments]
h.push(:comments => options[:with_comments])
end
js = {}
h.each do |k|
if k.is_a?(Symbol)
js[k] = self.send(k)
elsif k.is_a?(Hash)
if k.values.first.is_a?(Symbol)
js[k.keys.first] = self.send(k.values.first)
else
js[k.keys.first] = k.values.first
end
end
end
js
end
def assign_initial_hotness
self.hotness = self.calculated_hotness
end
def assign_short_id_and_score
self.short_id = ShortId.new(self.class).generate
self.score ||= 1 # tests are allowed to fake out the score
end
def calculated_hotness
# take each tag's hotness modifier into effect, and give a slight bump to
# stories submitted by the author
base = self.tags.sum(:hotness_mod) + (self.user_is_author? && self.url.present? ? 0.25 : 0.0)
# give a story's comment votes some weight, ignoring submitter's comments
sum_expression = base < 0 ? "flags * -0.5" : "score + 1"
cpoints = self.merged_comments.where.not(user_id: self.user_id).sum(sum_expression).to_f * 0.5
# mix in any stories this one cannibalized
cpoints += self.merged_stories.map(&:score).inject(&:+).to_f
# if a story has many comments but few votes, it's probably a bad story, so
# cap the comment points at the number of upvotes
upvotes = self.score + self.flags
if cpoints > upvotes
cpoints = upvotes
end
# don't immediately kill stories at 0 by bumping up score by one
order = Math.log([(score + 1).abs + cpoints, 1].max, 10)
if score > 0
sign = 1
elsif score < 0
sign = -1
else
sign = 0
end
return -((order * sign) + base +
((self.created_at || Time.current).to_f / HOTNESS_WINDOW)).round(7)
end
def can_be_seen_by_user?(user)
!is_gone? || (user && (user.is_moderator? || user.id == self.user_id))
end
def can_have_images?
# doesn't test self.editor so a user can't trick a mod into editing a
# story to enable an image
self.user.try(:is_moderator?)
end
def can_have_suggestions_from_user?(user)
if !user || (user.id == self.user_id) || !user.can_offer_suggestions?
return false
end
self.tags.each {|t| return false if t.privileged? }
return true
end
# this has to happen just before save rather than in tags_a= because we need
# to have a valid user_id
def check_tags
u = self.editor || self.user
self.taggings.each do |t|
if !t.tag.valid_for?(u)
raise "#{u.username} does not have permission to use privileged tag #{t.tag.tag}"
elsif !t.tag.active? && t.new_record? && !t.marked_for_destruction?
# stories can have inactive tags as long as they existed before
raise "#{u.username} cannot add inactive tag #{t.tag.tag}"
end
if u.is_new? && !t.tag.permit_by_new_users?
errors.add(:base, "New users can't submit #{t.tag.tag} stories, please wait. " <<
"If the tag is appropriate, leaving it off to skirt this restriction is a bad idea.")
end
end
if self.taggings.reject {|t| t.marked_for_destruction? || t.tag.is_media? }.empty?
errors.add(:base, "Must have at least one non-media (PDF, video) " <<
"tag. If no tags apply to your content, it probably doesn't " <<
"belong here.")
end
end
def comments_path
"#{short_id_path}/#{self.title_as_url}"
end
def comments_url
"#{short_id_url}/#{self.title_as_url}"
end
def description=(desc)
self[:description] = desc.to_s.rstrip
self.markeddown_description = self.generated_markeddown_description
end
def description_or_story_text(chars = 0)
s = if self.description.present?
self.markeddown_description.gsub(/<[^>]*>/, "")
else
self.story_text && self.story_text.body
end
if chars > 0 && s.to_s.length > chars
# remove last truncated word
s = s.to_s[0, chars].gsub(/ [^ ]*\z/, "")
end
HTMLEntities.new.decode(s.to_s)
end
def domain_search_url
"/search?order=newest&q=domain:#{self.domain}"
end
def fix_bogus_chars
# this is needlessly complicated to work around character encoding issues
# that arise when doing just self.title.to_s.gsub(160.chr, "")
self.title = self.title.to_s.split("").map {|chr|
if chr.ord == 160
" "
else
chr
end
}.join("")
true
end
def generated_markeddown_description
Markdowner.to_html(self.description, allow_images: self.can_have_images?)
end
# TODO: race condition: if two votes arrive at the same time, the second one
# won't take the first's score change into effect for calculated_hotness
def update_score_and_recalculate!(score_delta, flag_delta)
self.score += score_delta
self.flags += flag_delta
Story.connection.execute <<~SQL
UPDATE stories SET
score = (select coalesce(sum(vote), 0) from votes where story_id = stories.id and comment_id is null),
flags = (select count(*) from votes where story_id = stories.id and comment_id is null and vote = -1),
hotness = #{self.calculated_hotness}
WHERE id = #{self.id.to_i}
SQL
end
def has_suggestions?
# perf: save the round trip on a second query, equivalent to the below:
# self.suggested_taggings.any? || self.suggested_titles.any?
Story.joins(:suggested_taggings, :suggested_titles)
.where('stories.id = ? and
(suggested_taggings.id is not null or suggested_titles.id is not null)
', self.id)
.exists?
end
def hider_count
@hider_count ||= HiddenStory.where(:story_id => self.id).count
end
def html_class_for_user
c = []
if !self.user.is_active?
c.push "inactive_user"
elsif self.user.is_new?
c.push "new_user"
elsif self.user_is_author?
c.push "user_is_author"
end
c.join("")
end
def is_flaggable?
if self.created_at && self.score > FLAGGABLE_MIN_SCORE
Time.current - self.created_at <= FLAGGABLE_DAYS.days
else
false
end
end
def is_editable_by_user?(user)
if user && user.is_moderator?
return true
elsif user && user.id == self.user_id
if self.is_moderated?
return false
else
return (Time.current.to_i - self.created_at.to_i < (60 * MAX_EDIT_MINS))
end
else
return false
end
end
def is_gone?
is_expired? || (self.user.is_banned? && score < 0)
end
def is_hidden_by_user?(user)
!!HiddenStory.find_by(:user_id => user.id, :story_id => self.id)
end
def is_recent?
self.created_at >= RECENT_DAYS.days.ago
end
def is_saved_by_user?(user)
!!SavedStory.find_by(:user_id => user.id, :story_id => self.id)
end
def is_unavailable
self.unavailable_at != nil
end
def is_unavailable=(what)
self.unavailable_at = (what.to_i == 1 && !self.is_unavailable ? Time.current : nil)
end
def is_undeletable_by_user?(user)
if user && user.is_moderator?
return true
elsif user && user.id == self.user_id && !self.is_moderated?
return true
else
return false
end
end
def log_moderation
if self.new_record? ||
(!self.editing_from_suggestions && (!self.editor || self.editor.id == self.user_id))
return
end
all_changes = self.changes.merge(self.tagging_changes)
all_changes.delete("unavailable_at")
if !all_changes.any?
return
end
m = Moderation.new
if self.editing_from_suggestions
m.is_from_suggestions = true
else
m.moderator_user_id = self.editor.try(:id)
end
m.story_id = self.id
if all_changes["is_expired"] && self.is_expired?
m.action = "deleted story"
User.update_counters self.user_id, karma: (self.votes.count * -2)
elsif all_changes["is_expired"] && !self.is_expired?
m.action = "undeleted story"
else
m.action = all_changes.map {|k, v|
if k == "merged_story_id"
if v[1]
"merged into #{self.merged_into_story.short_id} " <<
"(#{self.merged_into_story.title})"
else
"unmerged from another story"
end
else
"changed #{k} from #{v[0].inspect} to #{v[1].inspect}"
end
}.join(", ")
end
m.reason = self.moderation_reason
m.save
self.is_moderated = true
end
def mailing_list_message_id
"story.#{short_id}.#{created_at.to_i}@#{Rails.application.domain}"
end
def mark_submitter
Keystore.increment_value_for("user:#{self.user_id}:stories_submitted")
end
def merged_comments
# TODO: make this a normal has_many?
Comment.where(story_id: Story.select(:id).where(merged_story_id: self.id)
.where('merged_story_id is not null') + [self.id])
end
def merge_story_short_id=(sid)
self.merged_story_id = sid.present? ? Story.where(:short_id => sid).pluck(:id).first : nil
end
def merge_story_short_id
self.merged_story_id ? self.merged_into_story.try(:short_id) : nil
end
def recalculate_hotness!
update_column :hotness, calculated_hotness
end
def record_initial_upvote
Vote.vote_thusly_on_story_or_comment_for_user_because(1, self.id, nil, self.user_id, nil, false)
end
def short_id_path
Rails.application.routes.url_helpers.root_path + "s/#{self.short_id}"
end
def short_id_url
Rails.application.root_url + "s/#{self.short_id}"
end
def show_score_to_user?(u)
return true if u && u.is_moderator?
# cast nil to 0, only show score if user hasn't flagged
(!vote || vote[:vote].to_i >= 0)
end
def tagging_changes
old_tags_a = self.taggings.reject(&:new_record?).map {|tg| tg.tag.tag }.join(" ")
new_tags_a = self.taggings.reject(&:marked_for_destruction?).map {|tg| tg.tag.tag }.join(" ")
if old_tags_a == new_tags_a
{}
else
{ "tags" => [old_tags_a, new_tags_a] }
end
end
def tags_a
@_tags_a ||= self.taggings.reject(&:marked_for_destruction?).map {|t| t.tag.tag }
end
def tags_a=(new_tag_names_a)
self.taggings.each do |tagging|
if !new_tag_names_a.include?(tagging.tag.tag)
tagging.mark_for_destruction
end
end
new_tag_names_a.uniq.each do |tag_name|
if tag_name.to_s != "" && !self.tags.exists?(:tag => tag_name)
if (t = Tag.active.find_by(:tag => tag_name))
# we can't lookup whether the user is allowed to use this tag yet
# because we aren't assured to have a user_id by now; we'll do it in
# the validation with check_tags
self.taggings.build(tag_id: t.id)
end
end
end
end
def save_suggested_tags_a_for_user!(new_tag_names_a, user)
st = self.suggested_taggings.where(:user_id => user.id)
st.each do |tagging|
if !new_tag_names_a.include?(tagging.tag.tag)
tagging.destroy
end
end
st.reload
new_tag_names_a.each do |tag_name|
# XXX: AR bug? st.exists?(:tag => tag_name) does not work
if tag_name.to_s != "" && !st.map {|x| x.tag.tag }.include?(tag_name)
if (t = Tag.active.find_by(:tag => tag_name)) &&
t.valid_for?(user)
tg = self.suggested_taggings.build
tg.user_id = user.id
tg.tag_id = t.id
tg.save!
st.reload
else
next
end
end
end
# if enough users voted on the same set of replacement tags, do it
tag_votes = {}
self.suggested_taggings.group_by(&:user_id).each do |_u, stg|
stg.each do |s|
tag_votes[s.tag.tag] ||= 0
tag_votes[s.tag.tag] += 1
end
end
final_tags = []
tag_votes.each do |k, v|
if v >= SUGGESTION_QUORUM
final_tags.push k
end
end
if final_tags.any? && (final_tags.sort != self.tags_a.sort)
Rails.logger.info "[s#{self.id}] promoting suggested tags " <<
"#{final_tags.inspect} instead of #{self.tags_a.inspect}"
self.editor = nil
self.editing_from_suggestions = true
self.moderation_reason = "Automatically changed from user suggestions"
self.tags_a = final_tags.sort
if !self.save
Rails.logger.error "[s#{self.id}] failed auto promoting: " <<
self.errors.inspect
end
end
end
def save_suggested_title_for_user!(title, user)
st = self.suggested_titles.find_by(:user_id => user.id)
if !st
st = self.suggested_titles.build
st.user_id = user.id
end
st.title = title
st.save!
# if enough users voted on the same exact title, save it
title_votes = {}
self.suggested_titles.each do |s|
title_votes[s.title] ||= 0
title_votes[s.title] += 1
end
title_votes.sort_by {|_k, v| v }.reverse_each do |kv|
if kv[1] >= SUGGESTION_QUORUM
Rails.logger.info "[s#{self.id}] promoting suggested title " <<
"#{kv[0].inspect} instead of #{self.title.inspect}"
self.editor = nil
self.editing_from_suggestions = true
self.moderation_reason = "Automatically changed from user suggestions"
self.title = kv[0]
if !self.save
Rails.logger.error "[s#{self.id}] failed auto promoting: " <<
self.errors.inspect
end
break
end
end
end
def title=(t)
# change unicode whitespace characters into real spaces
self[:title] = t.to_s.strip.gsub(/[\.,;:!]*$/, '')
end
def title_as_url
max_len = 35
wl = 0
words = []
self.title
.parameterize
.gsub(/[^a-z0-9]/, "_")
.split("_")
.reject {|z| TITLE_DROP_WORDS.include?(z) }
.each do |w|
if wl + w.length <= max_len
words.push w
wl += w.length
else
if wl == 0
words.push w[0, max_len]
end
break
end
end
if words.empty?
words.push "_"
end
words.join("_").gsub(/_-_/, "-")
end
def to_param
self.short_id
end
def update_availability
if self.is_unavailable && !self.unavailable_at
self.unavailable_at = Time.current
elsif self.unavailable_at && !self.is_unavailable
self.unavailable_at = nil
end
end
def update_comments_count!
comments = self.merged_comments.arrange_for_user(nil)
# calculate count after removing deleted comments and threads
self.update_column :comments_count, (comments.count {|c| !c.is_gone? })
self.update_merged_into_story_comments
self.recalculate_hotness!
end
def update_merged_into_story_comments
if self.merged_into_story
self.merged_into_story.update_comments_count!
end
end
# disincentivize content marketers by not appearing to be a source of
# significant traffic, but do show referrer a few times so authors can find
# their way back
def send_referrer?
self.created_at && self.created_at <= 1.hour && self.merged_story_id.nil?
end
def set_domain(match)
name = match ? match[:domain].sub(/^www\d*\./, '') : nil
self.domain = name ? Domain.where(domain: name).first_or_initialize : nil
end
def url=(u)
super(u.try(:strip)) or return if u.blank?
if (match = u.match(URL_RE))
# remove well-known port for http and https if present
@url_port = match[:port]
if match[:protocol] == 'http' && match[:port] == ':80' ||
match[:protocol] == 'https' && match[:port] == ':443'
u = u[0...match.begin(3)] + u[match.end(3)..-1]
@url_port = nil
end
end
set_domain(match)
# strip out tracking query params
if (match = u.match(/\A([^\?]+)\?(.+)\z/))
params = match[2].split(/[&\?]/)
# utm_ is google and many others; sk is medium
params.reject! {|p| p.match(/^utm_(source|medium|campaign|term|content)=|^sk=|^fbclid=/) }
u = match[1] << (params.any?? "?" << params.join("&") : "")
end
super(u)
end
def url_is_editable_by_user?(user)
if self.new_record?
true
elsif user && user.is_moderator? && self.url.present?
true
else
false
end
end
def url_or_comments_path
self.url.presence || self.comments_path
end
def url_or_comments_url
self.url.presence || self.comments_url
end
def vote_summary_for(user)
r_counts = {}
r_whos = {}
votes.includes(user && user.is_moderator? ? :user : nil).find_each do |v|
next if v.vote == 0
r_counts[v.reason.to_s] ||= 0
r_counts[v.reason.to_s] += v.vote
if user && user.is_moderator?
r_whos[v.reason.to_s] ||= []
r_whos[v.reason.to_s].push v.user.username
end
end
r_counts.keys.sort.map {|k|
if k == ""
"+#{r_counts[k]}"
else
"#{r_counts[k]} " +
(Vote::ALL_STORY_REASONS[k] || k) +
(user && user.is_moderator? ? " (#{r_whos[k].join(', ')})" : "")
end
}.join(", ")
end
def fetched_attributes_html
converted = @fetched_response.body.force_encoding('utf-8')
parsed = Nokogiri::HTML(converted.to_s)
# parse best title from html tags
# try <meta property="og:title"> first, it probably won't have the site
# name
title = ""
begin
title = parsed.at_css("meta[property='og:title']")
.attributes["content"].text
rescue
end
# then try <meta name="title">
if title.to_s == ""
begin
title = parsed.at_css("meta[name='title']").attributes["content"].text
rescue
end
end
# then try plain old <title>
if title.to_s == ""
title = parsed.at_css("title").try(:text).to_s
end
# see if the site name is available, so we can strip it out in case it was
# present in the fetched title
begin
site_name = parsed.at_css("meta[property='og:site_name']")
.attributes["content"].text
if site_name.present? &&
site_name.length < title.length &&
title[-(site_name.length), site_name.length] == site_name
title = title[0, title.length - site_name.length]
# remove title/site name separator
if title.match(/ [ \-\|\u2013] $/)
title = title[0, title.length - 3]
end
end
rescue
end
@fetched_attributes[:title] = title
# attempt to get the canonical url if it can be parsed,
# if it is not the domain root path, and if it
# responds to GET with a 200-level code
begin
cu = canonical_target(parsed)
@fetched_attributes[:url] = cu if valid_canonical_uri?(cu)
rescue
end
@fetched_attributes
end
def fetched_attributes_pdf
return @fetched_attributes = {} if @fetched_response.body.length >= 5.megabytes
# pdf-reader only accepts a stream or filename
pdf_stream = StringIO.new(@fetched_response.body)
pdf = PDF::Reader.new(pdf_stream)
title = pdf.info[:Title]
@fetched_attributes[:title] = title
@fetched_attributes
end
def fetched_attributes
return @fetched_attributes if @fetched_attributes
@fetched_attributes = {
:url => self.url,
:title => "",
}
# security: do not connect to arbitrary user-submitted ports
return @fetched_attributes if @url_port
begin
# if we haven't had a test inject a response into us
if !@fetched_response
s = Sponge.new
s.timeout = 3
# User submitted URLs may have an incorrect https certificate, but we
# don't want to fail the retrieval for this. Security risk is minimal.
s.ssl_verify = false
headers = {
"User-agent" => "#{Rails.application.domain} for #{fetching_ip}",
"Referer" => Rails.application.domain,
}
res = s.fetch(url, :get, nil, nil, headers, 3)
@fetched_response = res
end
case @fetched_response["content-type"]
when /pdf/
return fetched_attributes_pdf
else
return fetched_attributes_html
end
rescue
return @fetched_attributes
end
end
private
def valid_canonical_uri?(url)
ucu = URI.parse(url)
new_page = ucu &&
ucu.scheme.present? &&
ucu.host.present? &&
ucu.path != "/"
return false unless new_page
res = Sponge.new.fetch(url)
res.code.to_s =~ /\A2.*\Z/
end
def canonical_target(parsed)
parsed.at_css("link[rel='canonical']").attributes["href"].text
end
end
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