policies: remove current request from context.

This refactors Pundit policies to only rely on the current user, not on
the current user and the current HTTP request. In retrospect, it was a
bad idea to include the current request in the Pundit context. It bleeds
out everywhere and there are many contexts (in tests and models) where
we only have the current user, not the current request. The previous
commit got rid of the only two places where we used it.

app/components/comment_component.rb

@@ -7,7 +7,7 @@ class CommentComponent < ApplicationComponent
   def self.with_collection(comments, current_user:, **options)
     dtext_data = DText.preprocess(comments.map(&:body))
     # XXX
-    #comments = comments.includes(:moderation_reports) if Pundit.policy!([current_user, nil], ModerationReport).show?
+    #comments = comments.includes(:moderation_reports) if Pundit.policy!(current_user, ModerationReport).show?
 
     super(comments, current_user: current_user, dtext_data: dtext_data, **options)
   end

app/components/forum_post_component.rb

@@ -11,7 +11,7 @@ class ForumPostComponent < ApplicationComponent
     original_forum_post_id = forum_topic.original_post&.id
 
     forum_posts = forum_posts.includes(:creator, :bulk_update_request)
-    forum_posts = forum_posts.includes(:moderation_reports) if Pundit.policy!([current_user, nil], ModerationReport).show?
+    forum_posts = forum_posts.includes(:moderation_reports) if Pundit.policy!(current_user, ModerationReport).show?
 
     super(forum_posts, dtext_data: dtext_data, original_forum_post_id: original_forum_post_id, current_user: current_user)
   end

app/controllers/application_controller.rb

@@ -182,7 +182,7 @@ class ApplicationController < ActionController::Base
   end
 
   def pundit_user
-    [CurrentUser.user, request]
+    CurrentUser.user
   end
 
   def pundit_params_for(record)

app/logical/post_query_builder.rb

@@ -392,7 +392,7 @@ class PostQueryBuilder
   def favorites_include(username)
     favuser = User.find_by_name(username)
 
-    if favuser.present? && Pundit.policy!([current_user, nil], favuser).can_see_favorites?
+    if favuser.present? && Pundit.policy!(current_user, favuser).can_see_favorites?
       favorites = Favorite.from("favorites_#{favuser.id % 100} AS favorites").where(user: favuser)
       Post.where(id: favorites.select(:post_id))
     else
@@ -403,7 +403,7 @@ class PostQueryBuilder
   def ordfav_matches(username)
     user = User.find_by_name(username)
 
-    if user.present? && Pundit.policy!([current_user, nil], user).can_see_favorites?
+    if user.present? && Pundit.policy!(current_user, user).can_see_favorites?
       Post.joins(:favorites).merge(Favorite.for_user(user.id)).order("favorites.id DESC")
     else
       Post.none

app/logical/recommender_service.rb

@@ -54,7 +54,7 @@ module RecommenderService
     end
 
     if user.present?
-      raise User::PrivilegeError unless Pundit.policy!([CurrentUser.user, nil], user).can_see_favorites?
+      raise User::PrivilegeError unless Pundit.policy!(CurrentUser.user, user).can_see_favorites?
       max_recommendations = params.fetch(:max_recommendations, user.favorite_count + 500).to_i.clamp(0, 50000)
       recs = RecommenderService.recommend_for_user(user, tags: params[:post_tags_match], limit: max_recommendations)
     elsif post.present?

app/models/application_record.rb

@@ -57,13 +57,13 @@ class ApplicationRecord < ActiveRecord::Base
 
     # XXX deprecated, shouldn't expose this as an instance method.
     def api_attributes(user: CurrentUser.user)
-      policy = Pundit.policy([user, nil], self) || ApplicationPolicy.new([user, nil], self)
+      policy = Pundit.policy(user, self) || ApplicationPolicy.new(user, self)
       policy.api_attributes
     end
 
     # XXX deprecated, shouldn't expose this as an instance method.
     def html_data_attributes(user: CurrentUser.user)
-      policy = Pundit.policy([user, nil], self) || ApplicationPolicy.new([user, nil], self)
+      policy = Pundit.policy(user, self) || ApplicationPolicy.new(user, self)
       policy.html_data_attributes
     end
 

app/models/pool.rb

@@ -144,7 +144,7 @@ class Pool < ApplicationRecord
   end
 
   def updater_can_edit_deleted
-    if is_deleted? && !Pundit.policy!([CurrentUser.user, nil], self).update?
+    if is_deleted? && !Pundit.policy!(CurrentUser.user, self).update?
       errors.add(:base, "You cannot update pools that are deleted")
     end
   end

app/models/post.rb

@@ -668,12 +668,12 @@ class Post < ApplicationRecord
 
         when /^-favgroup:(.+)$/i
           favgroup = FavoriteGroup.find_by_name_or_id!($1, CurrentUser.user)
-          raise User::PrivilegeError unless Pundit.policy!([CurrentUser.user, nil], favgroup).update?
+          raise User::PrivilegeError unless Pundit.policy!(CurrentUser.user, favgroup).update?
           favgroup&.remove!(self)
 
         when /^favgroup:(.+)$/i
           favgroup = FavoriteGroup.find_by_name_or_id!($1, CurrentUser.user)
-          raise User::PrivilegeError unless Pundit.policy!([CurrentUser.user, nil], favgroup).update?
+          raise User::PrivilegeError unless Pundit.policy!(CurrentUser.user, favgroup).update?
           favgroup&.add!(self)
 
         end
@@ -779,7 +779,7 @@ class Post < ApplicationRecord
 
     def add_favorite!(user)
       Favorite.add(post: self, user: user)
-      vote!("up", user) if Pundit.policy!([user, nil], PostVote).create?
+      vote!("up", user) if Pundit.policy!(user, PostVote).create?
     rescue PostVote::Error
     end
 
@@ -789,7 +789,7 @@ class Post < ApplicationRecord
 
     def remove_favorite!(user)
       Favorite.remove(post: self, user: user)
-      unvote!(user) if Pundit.policy!([user, nil], PostVote).create?
+      unvote!(user) if Pundit.policy!(user, PostVote).create?
     rescue PostVote::Error
     end
 
@@ -803,7 +803,7 @@ class Post < ApplicationRecord
     # Users who publicly favorited this post, ordered by time of favorite.
     def visible_favorited_users(viewer)
       favorited_users.order("favorites.id DESC").select do |fav_user|
-        Pundit.policy!([viewer, nil], fav_user).can_see_favorites?
+        Pundit.policy!(viewer, fav_user).can_see_favorites?
       end
     end
 
@@ -876,7 +876,7 @@ class Post < ApplicationRecord
     end
 
     def vote!(vote, voter = CurrentUser.user)
-      unless Pundit.policy!([voter, nil], PostVote).create?
+      unless Pundit.policy!(voter, PostVote).create?
         raise PostVote::Error.new("You do not have permission to vote")
       end
 

app/models/post_event.rb

@@ -56,7 +56,7 @@ class PostEvent
       true
     when PostFlag
       flag = event
-      Pundit.policy!([user, nil], flag).can_view_flagger?
+      Pundit.policy!(user, flag).can_view_flagger?
     end
   end
 

app/models/post_flag.rb

@@ -31,7 +31,7 @@ class PostFlag < ApplicationRecord
     def creator_matches(creator, searcher)
       return none if creator.nil?
 
-      policy = Pundit.policy!([searcher, nil], PostFlag.new(creator: creator))
+      policy = Pundit.policy!(searcher, PostFlag.new(creator: creator))
 
       if policy.can_view_flagger?
         where(creator: creator).where.not(post: searcher.posts)

app/models/tag.rb

@@ -204,7 +204,7 @@ class Tag < ApplicationRecord
             # next few lines if the category is changed.
             tag.update_category_cache
 
-            if Pundit.policy!([creator, nil], tag).can_change_category?
+            if Pundit.policy!(creator, tag).can_change_category?
               tag.update(category: category_id)
             end
           end

app/policies/application_policy.rb

@@ -1,8 +1,8 @@
 class ApplicationPolicy
-  attr_reader :user, :request, :record
+  attr_reader :user, :record
 
-  def initialize(context, record)
-    @user, @request = context
+  def initialize(user, record)
+    @user = user
     @record = record
   end
 
@@ -43,7 +43,7 @@ class ApplicationPolicy
   end
 
   def policy(object)
-    Pundit.policy!([user, request], object)
+    Pundit.policy!(user, object)
   end
 
   def permitted_attributes
@@ -68,6 +68,7 @@ class ApplicationPolicy
 
   # The list of attributes that are permitted to be returned by the API.
   def api_attributes
+    # XXX allow inet
     record.class.attribute_types.reject { |name, attr| attr.type.in?([:inet, :tsvector]) }.keys.map(&:to_sym)
   end
 

app/views/delayed_jobs/index.html.erb

@@ -24,7 +24,7 @@
         <%= time_ago_in_words_tagged(job.run_at) %>
       <% end %>
       <% t.column column: "control" do |job| %>
-        <% if DelayedJobPolicy.new([CurrentUser.user, request], job).update? %>
+        <% if DelayedJobPolicy.new(CurrentUser.user, job).update? %>
           <% if job.locked_at? %>
             Running
           <% elsif job.failed? %>