filter out non-anon questions from blocked/muted users in questions view

app/controllers/question_controller.rb

@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 class QuestionController < ApplicationController
   def show
     @question = Question.find(params[:id])
-    @answers = @question.cursored_answers(last_id: params[:last_id])
+    @answers = @question.cursored_answers(last_id: params[:last_id], current_user:)
     @answers_last_id = @answers.map(&:id).min
-    @more_data_available = !@question.cursored_answers(last_id: @answers_last_id, size: 1).count.zero?
+    @more_data_available = !@question.cursored_answers(last_id: @answers_last_id, size: 1, current_user:).count.zero?
 
     respond_to do |format|
       format.html

app/models/question/answer_methods.rb

@@ -5,8 +5,17 @@ module Question::AnswerMethods
 
   define_cursor_paginator :cursored_answers, :ordered_answers
 
-  def ordered_answers
+  def ordered_answers(current_user: nil)
     answers
+      .then do |query|
+        next query unless current_user
+
+        blocked_and_muted_user_ids = current_user.blocked_user_ids_cached + current_user.muted_user_ids_cached
+        next query if blocked_and_muted_user_ids.empty?
+
+        query
+          .where.not(answers: { user_id: blocked_and_muted_user_ids })
+      end
       .order(:created_at)
       .reverse_order
   end

spec/controllers/question_controller_spec.rb

@@ -56,6 +56,17 @@ describe QuestionController, type: :controller do
             expect(assigns(:more_data_available)).to eq(true)
           end
         end
+
+        context "when signed in" do
+          before do
+            sign_in(FactoryBot.create(:user))
+          end
+
+          it "is fine" do
+            # basic test to make sure nothing breaks with an user
+            expect(subject).to have_http_status(:ok)
+          end
+        end
       end
     end
   end

spec/models/question_spec.rb

@@ -1,30 +1,97 @@
-require 'rails_helper'
+# frozen_string_literal: true
 
-RSpec.describe Question, :type => :model do
-  before :each do
-    @question = Question.new(
-        content: 'Is this a question?',
-        user: FactoryBot.create(:user)
+require "rails_helper"
+
+RSpec.describe Question, type: :model do
+  let(:user) { FactoryBot.create :user }
+
+  let(:question) { Question.new(content: "Is this a question?", user:) }
+
+  subject { question }
+
+  it { is_expected.to respond_to(:content) }
+
+  describe "#content" do
+    it "returns a string" do
+      expect(question.content).to match "Is this a question?"
+    end
+  end
+
+  context "when it has many answers" do
+    before do
+      5.times do |i|
+        Answer.create(
+          content:  "This is an answer. #{i}",
+          user:     FactoryBot.create(:user),
+          question:
         )
       end
-
-  subject { @question }
-
-  it { should respond_to(:content) }
-
-  it '#content returns a string' do
-    expect(@question.content).to match 'Is this a question?'
     end
 
-  it 'has many answers' do
-    5.times { |i| Answer.create(content: "This is an answer. #{i}", user: FactoryBot.create(:user), question: @question) }
-    expect(@question.answer_count).to match 5
-  end
+    its(:answer_count) { is_expected.to eq 5 }
 
-  it 'also deletes the answers when deleted' do
-    5.times { |i| Answer.create(content: "This is an answer. #{i}", user: FactoryBot.create(:user), question: @question) }
-    first_answer_id = @question.answers.first.id
-    @question.destroy
+    it "deletes the answers when deleted" do
+      first_answer_id = question.answers.first.id
+      question.destroy
       expect { Answer.find(first_answer_id) }.to raise_error(ActiveRecord::RecordNotFound)
     end
   end
+
+  describe "#ordered_answers" do
+    let(:normal_user) { FactoryBot.create(:user) }
+
+    let(:blocked_user) { FactoryBot.create(:user) }
+
+    let(:muted_user) { FactoryBot.create(:user) }
+
+    let!(:answer_from_normal_user) do
+      FactoryBot.create(
+        :answer,
+        user:     normal_user,
+        content:  "answer from a normal user",
+        question:
+      )
+    end
+
+    let!(:answer_from_blocked_user) do
+      FactoryBot.create(
+        :answer,
+        user:     blocked_user,
+        content:  "answer from a blocked user",
+        question:
+      )
+    end
+
+    let!(:answer_from_muted_user) do
+      FactoryBot.create(
+        :answer,
+        user:     muted_user,
+        content:  "answer from a blocked user",
+        question:
+      )
+    end
+
+    subject { question.ordered_answers }
+
+    it "includes all answers to questions" do
+      expect(subject).to include(answer_from_normal_user)
+      expect(subject).to include(answer_from_blocked_user)
+      expect(subject).to include(answer_from_muted_user)
+    end
+
+    context "when given a current user who blocks and mutes some users" do
+      before do
+        user.block blocked_user
+        user.mute muted_user
+      end
+
+      subject { question.ordered_answers current_user: user }
+
+      it "only includes answers to questions from users the user doesn't block or mute" do
+        expect(subject).to include(answer_from_normal_user)
+        expect(subject).not_to include(answer_from_blocked_user)
+        expect(subject).not_to include(answer_from_muted_user)
+      end
+    end
+  end
+end