discourse/spec/lib/post_creator_spec.rb

# frozen_string_literal: true

require "post_creator"
require "topic_subtype"

RSpec.describe PostCreator do
  fab!(:user) { Fabricate(:user) }
  fab!(:admin) { Fabricate(:admin) }
  fab!(:coding_horror) { Fabricate(:coding_horror) }
  fab!(:evil_trout) { Fabricate(:evil_trout) }
  let(:topic) { Fabricate(:topic, user: user) }

  describe "new topic" do
    fab!(:category) { Fabricate(:category, user: user) }
    let(:basic_topic_params) do
      { title: "hello world topic", raw: "my name is fred", archetype_id: 1, advance_draft: true }
    end
    let(:image_sizes) do
      { "http://an.image.host/image.jpg" => { "width" => 111, "height" => 222 } }
    end

    let(:creator) { PostCreator.new(user, basic_topic_params) }
    let(:creator_with_category) do
      PostCreator.new(user, basic_topic_params.merge(category: category.id))
    end
    let(:creator_with_meta_data) do
      PostCreator.new(user, basic_topic_params.merge(meta_data: { hello: "world" }))
    end
    let(:creator_with_image_sizes) do
      PostCreator.new(user, basic_topic_params.merge(image_sizes: image_sizes))
    end
    let(:creator_with_featured_link) do
      PostCreator.new(
        user,
        title: "featured link topic",
        archetype_id: 1,
        featured_link: "http://www.discourse.org",
        raw: "http://www.discourse.org",
      )
    end

    it "can create a topic with null byte central" do
      post =
        PostCreator.create(
          user,
          title: "hello\u0000world this is title",
          raw: "this is my\u0000 first topic",
        )
      expect(post.raw).to eq "this is my first topic"
      expect(post.topic.title).to eq "Helloworld this is title"
    end

    it "can be created with auto tracking disabled" do
      p = PostCreator.create(user, basic_topic_params.merge(auto_track: false))
      # must be 0 otherwise it will think we read the topic which is clearly untrue
      expect(TopicUser.where(user_id: p.user_id, topic_id: p.topic_id).count).to eq(0)
    end

    it "can be created with first post as wiki" do
      cat = Fabricate(:category)
      cat.all_topics_wiki = true
      cat.save
      post = PostCreator.create(user, basic_topic_params.merge(category: cat.id))
      expect(post.wiki).to eq(true)
    end

    it "creates post with a hidden reason for staff user" do
      hri = Post.hidden_reasons[:flag_threshold_reached]
      post = PostCreator.create(admin, basic_topic_params.merge(hidden_reason_id: hri))
      expect(post.hidden).to eq(true)
      expect(post.hidden_at).to be_present
      expect(post.hidden_reason_id).to eq(hri)
      expect(post.topic.visible).to eq(false)
      expect(post.user.topic_count).to eq(0)
      expect(post.user.post_count).to eq(0)
    end

    it "fails to create post with a hidden reason for non-staff user" do
      hri = Post.hidden_reasons[:flag_threshold_reached]

      expect do
        post = PostCreator.create(user, basic_topic_params.merge(hidden_reason_id: hri))

        expect(post).to be_nil
      end.not_to change { Post.count }
    end

    it "ensures the user can create the topic" do
      Guardian.any_instance.expects(:can_create?).with(Topic, nil).returns(false)
      expect { creator.create }.to raise_error(Discourse::InvalidAccess)
    end

    it "can be created with custom fields" do
      post =
        PostCreator.create(
          user,
          basic_topic_params.merge(topic_opts: { custom_fields: { hello: "world" } }),
        )
      expect(post.topic.custom_fields).to eq("hello" => "world")
    end

    context "with reply to post number" do
      it "omits reply to post number if received on a new topic" do
        p = PostCreator.new(user, basic_topic_params.merge(reply_to_post_number: 3)).create
        expect(p.reply_to_post_number).to be_nil
      end
    end

    context "with invalid title" do
      let(:creator_invalid_title) { PostCreator.new(user, basic_topic_params.merge(title: "a")) }

      it "has errors" do
        creator_invalid_title.create
        expect(creator_invalid_title.errors).to be_present
      end
    end

    context "with invalid raw" do
      let(:creator_invalid_raw) { PostCreator.new(user, basic_topic_params.merge(raw: "")) }

      it "has errors" do
        creator_invalid_raw.create
        expect(creator_invalid_raw.errors).to be_present
      end
    end

    context "with success" do
      before { creator }

      it "is not hidden" do
        p = creator.create
        expect(p.hidden).to eq(false)
        expect(p.hidden_at).not_to be_present
        expect(p.hidden_reason_id).to eq(nil)
        expect(p.topic.visible).to eq(true)
      end

      it "doesn't return true for spam" do
        creator.create
        expect(creator.spam?).to eq(false)
      end

      it "triggers extensibility events" do
        events = DiscourseEvent.track_events { creator.create }

        expect(events.map { |event| event[:event_name] }).to include(
          :before_create_post,
          :validate_post,
          :topic_created,
          :post_created,
          :after_validate_topic,
          :before_create_topic,
          :after_trigger_post_process,
          :markdown_context,
          :topic_notification_level_changed,
        )
      end

      it "before_create_post event signature contains both post and opts" do
        events = DiscourseEvent.track_events { creator.create }

        expect(events).to include(
          event_name: :before_create_post,
          params: [creator.post, creator.opts],
        )
      end

      it "does not notify on system messages" do
        messages =
          MessageBus.track_publish do
            p =
              PostCreator.create(
                admin,
                basic_topic_params.merge(post_type: Post.types[:moderator_action]),
              )
            PostCreator.create(
              admin,
              basic_topic_params.merge(
                topic_id: p.topic_id,
                post_type: Post.types[:moderator_action],
              ),
            )
          end
        # don't notify on system messages they introduce too much noise
        channels = messages.map(&:channel)
        expect(channels.find { |s| s =~ /unread/ }).to eq(nil)
        expect(channels.find { |s| s =~ /new/ }).to eq(nil)
      end

      it "enqueues job to generate messages" do
        p = creator.create
        expect(
          job_enqueued?(job: :post_update_topic_tracking_state, args: { post_id: p.id }),
        ).to eq(true)
      end

      it "generates the correct messages for a secure topic" do
        Jobs.run_immediately!
        UserActionManager.enable

        admin = Fabricate(:user)
        admin.grant_admin!
        other_admin = Fabricate(:user)
        other_admin.grant_admin!

        cat = Fabricate(:category)
        cat.set_permissions(admins: :full)
        cat.save

        created_post = nil
        other_user_tracking_topic = nil

        messages =
          MessageBus.track_publish do
            created_post = PostCreator.new(admin, basic_topic_params.merge(category: cat.id)).create
            Fabricate(:topic_user_tracking, topic: created_post.topic, user: other_admin)
            _reply =
              PostCreator.new(
                admin,
                raw: "this is my test reply 123 testing",
                topic_id: created_post.topic_id,
                advance_draft: true,
              ).create
          end

        messages.filter! { |m| m.channel != "/distributed_hash" }

        channels = messages.map { |m| m.channel }.sort

        # 3 for topic, one to notify of new topic, one for topic stats and another for tracking state
        expect(channels).to eq(
          [
            "/new",
            "/u/#{admin.username}",
            "/u/#{admin.username}",
            "/unread",
            "/unread/#{admin.id}",
            "/latest",
            "/latest",
            "/topic/#{created_post.topic_id}",
            "/topic/#{created_post.topic_id}",
            "/topic/#{created_post.topic_id}",
            "/user-drafts/#{admin.id}",
            "/user-drafts/#{admin.id}",
            "/user-drafts/#{admin.id}",
          ].sort,
        )

        admin_ids = [Group[:admins].id]
        expect(
          messages.any? do |m|
            m.group_ids != admin_ids &&
              (!m.user_ids.include?(other_admin.id) && !m.user_ids.include?(admin.id))
          end,
        ).to eq(false)
      end

      it "generates the correct messages for a normal topic" do
        Jobs.run_immediately!
        UserActionManager.enable

        p = nil
        messages = MessageBus.track_publish { p = creator.create }

        latest = messages.find { |m| m.channel == "/latest" }
        expect(latest).not_to eq(nil)

        latest = messages.find { |m| m.channel == "/new" }
        expect(latest).not_to eq(nil)

        read = messages.find { |m| m.channel == "/unread/#{p.user_id}" }
        expect(read).not_to eq(nil)

        user_action = messages.find { |m| m.channel == "/u/#{p.user.username}" }
        expect(user_action).not_to eq(nil)

        draft_count = messages.find { |m| m.channel == "/user-drafts/#{p.user_id}" }
        expect(draft_count).not_to eq(nil)

        topics_stats =
          messages.find { |m| m.channel == "/topic/#{p.topic.id}" && m.data[:type] == :stats }
        expect(topics_stats).to eq(nil)

        expect(messages.filter { |m| m.channel != "/distributed_hash" }.length).to eq(7)
      end

      it "extracts links from the post" do
        create_post(raw: "this is a link to the best site at https://google.com")
        creator.create
        expect(TopicLink.count).to eq(1)
      end

      it "queues up post processing job when saved" do
        creator.create

        post = Post.last
        post_id = post.id
        topic_id = post.topic_id

        process_post_args = Jobs::ProcessPost.jobs.first["args"].first
        expect(process_post_args["post_id"]).to eq(post_id)

        feature_topic_users_args = Jobs::FeatureTopicUsers.jobs.first["args"].first
        expect(feature_topic_users_args["topic_id"]).to eq(topic_id)

        post_alert_args = Jobs::PostAlert.jobs.first["args"].first
        expect(post_alert_args["post_id"]).to eq(post_id)

        notify_mailing_list_subscribers_args =
          Jobs::NotifyMailingListSubscribers.jobs.first["args"].first

        expect(notify_mailing_list_subscribers_args["post_id"]).to eq(post_id)
      end

      it "passes the invalidate_oneboxes along to the job if present" do
        creator.opts[:invalidate_oneboxes] = true
        creator.create

        expect(job_enqueued?(job: :process_post, args: { invalidate_oneboxes: true })).to eq(true)
      end

      it "passes the image_sizes along to the job if present" do
        image_sizes = { "http://an.image.host/image.jpg" => { "width" => 17, "height" => 31 } }
        creator.opts[:image_sizes] = image_sizes
        creator.create

        expect(job_enqueued?(job: :process_post, args: { image_sizes: image_sizes })).to eq(true)
      end

      it "assigns a category when supplied" do
        expect(creator_with_category.create.topic.category).to eq(category)
      end

      it "adds  meta data from the post" do
        expect(creator_with_meta_data.create.topic.meta_data["hello"]).to eq("world")
      end

      it "passes the image sizes through" do
        Post.any_instance.expects(:image_sizes=).with(image_sizes)
        creator_with_image_sizes.create
      end

      it "sets topic excerpt if first post, but not second post" do
        first_post = creator.create
        topic = first_post.topic.reload
        expect(topic.excerpt).to be_present
        expect {
          PostCreator.new(
            first_post.user,
            topic_id: first_post.topic_id,
            raw: "this is the second post",
          ).create
          topic.reload
        }.to_not change { topic.excerpt }
      end

      it "supports custom excerpts" do
        raw = <<~MD
          <div class='excerpt'>
          I am

          a custom excerpt
          </div>

          testing
        MD
        post = create_post(raw: raw)

        expect(post.excerpt).to eq("I am\na custom excerpt")
      end

      it "creates post stats" do
        Draft.set(user, Draft::NEW_TOPIC, 0, "test")
        Draft.set(user, Draft::NEW_TOPIC, 0, "test1")
        expect(user.user_stat.draft_count).to eq(1)

        begin
          PostCreator.track_post_stats = true
          post = creator.create
          expect(post.post_stat.typing_duration_msecs).to eq(0)
          expect(post.post_stat.drafts_saved).to eq(2)
          expect(user.reload.user_stat.draft_count).to eq(0)
        ensure
          PostCreator.track_post_stats = false
        end
      end

      it "clears the draft if advanced_draft is true" do
        creator = PostCreator.new(user, basic_topic_params.merge(advance_draft: true))
        Draft.set(user, Draft::NEW_TOPIC, 0, "test")
        expect(Draft.where(user: user).size).to eq(1)
        expect { creator.create }.to change { Draft.count }.by(-1)
      end

      it "does not clear the draft if advanced_draft is false" do
        creator = PostCreator.new(user, basic_topic_params.merge(advance_draft: false))
        Draft.set(user, Draft::NEW_TOPIC, 0, "test")
        expect(Draft.where(user: user).size).to eq(1)
        expect { creator.create }.not_to change { Draft.count }
      end

      it "updates topic stats" do
        first_post = creator.create
        topic = first_post.topic.reload

        expect(topic.last_posted_at).to eq_time(first_post.created_at)
        expect(topic.last_post_user_id).to eq(first_post.user_id)
        expect(topic.word_count).to eq(4)
      end

      it "creates a post with featured link" do
        SiteSetting.topic_featured_link_enabled = true
        SiteSetting.min_first_post_length = 100

        post = creator_with_featured_link.create
        expect(post.topic.featured_link).to eq("http://www.discourse.org")
        expect(post.valid?).to eq(true)
      end

      it "allows notification email to be skipped" do
        user_2 = Fabricate(:user)

        creator =
          PostCreator.new(
            user,
            title: "hi there welcome to my topic",
            raw: "this is my awesome message @#{user_2.username_lower}",
            archetype: Archetype.private_message,
            target_usernames: [user_2.username],
            post_alert_options: {
              skip_send_email: true,
            },
          )

        NotificationEmailer.expects(:process_notification).never

        creator.create
      end

      describe "topic's auto close" do
        it "doesn't update topic's auto close when it's not based on last post" do
          freeze_time

          topic = Fabricate(:topic).set_or_create_timer(TopicTimer.types[:close], 12)
          PostCreator.new(topic.user, topic_id: topic.id, raw: "this is a second post").create
          topic.reload

          topic_status_update = TopicTimer.last
          expect(topic_status_update.execute_at).to eq_time(12.hours.from_now)
          expect(topic_status_update.created_at).to eq_time(Time.zone.now)
        end

        describe "topic's auto close based on last post" do
          fab!(:topic_timer) do
            Fabricate(
              :topic_timer,
              based_on_last_post: true,
              execute_at: Time.zone.now - 12.hours,
              created_at: Time.zone.now - 24.hours,
              duration_minutes: 12 * 60,
            )
          end

          let(:topic) { topic_timer.topic }

          fab!(:post) { Fabricate(:post, topic: topic_timer.topic) }

          it "updates topic's auto close date" do
            freeze_time
            post

            PostCreator.new(topic.user, topic_id: topic.id, raw: "this is a second post").create

            topic_timer.reload

            expect(topic_timer.execute_at).to eq_time(Time.zone.now + 12.hours)
            expect(topic_timer.created_at).to eq_time(Time.zone.now)
          end

          describe "when auto_close_topics_post_count has been reached" do
            before { SiteSetting.auto_close_topics_post_count = 2 }

            it "closes the topic and deletes the topic timer" do
              freeze_time
              post

              PostCreator.new(topic.user, topic_id: topic.id, raw: "this is a second post").create

              topic.reload

              expect(topic.posts.last.raw).to eq(
                I18n.t(
                  "topic_statuses.autoclosed_topic_max_posts",
                  count: SiteSetting.auto_close_topics_post_count,
                ),
              )

              expect(topic.closed).to eq(true)
              expect(topic_timer.reload.deleted_at).to eq_time(Time.zone.now)
            end

            it "uses the system locale for the message" do
              post

              I18n.with_locale(:fr) do
                PostCreator.new(topic.user, topic_id: topic.id, raw: "this is a second post").create
              end

              topic.reload

              expect(topic.posts.last.raw).to eq(
                I18n.t(
                  "topic_statuses.autoclosed_topic_max_posts",
                  count: SiteSetting.auto_close_topics_post_count,
                  locale: :en,
                ),
              )
            end

            describe "auto_close_topics_create_linked_topic is enabled" do
              before { SiteSetting.auto_close_topics_create_linked_topic = true }

              it "enqueues a job to create a new linked topic" do
                freeze_time
                post

                post_2 =
                  PostCreator.new(
                    topic.user,
                    topic_id: topic.id,
                    raw: "this is a second post",
                  ).create

                topic.reload

                expect(topic.closed).to eq(true)
                expect(topic_timer.reload.deleted_at).to eq_time(Time.zone.now)
                expect(
                  job_enqueued?(job: :create_linked_topic, args: { post_id: post_2.id }),
                ).to eq(true)
              end
            end
          end
        end
      end

      context "with tags" do
        let(:tag_names) { %w[art science dance] }
        let(:creator_with_tags) { PostCreator.new(user, basic_topic_params.merge(tags: tag_names)) }

        context "with tagging disabled" do
          before { SiteSetting.tagging_enabled = false }

          it "doesn't create tags" do
            expect { @post = creator_with_tags.create }.not_to change { Tag.count }
            expect(@post.topic&.tags&.size).to eq(nil)
          end
        end

        context "with tagging enabled" do
          before { SiteSetting.tagging_enabled = true }

          context "when can create tags" do
            before do
              SiteSetting.min_trust_to_create_tag = 0
              SiteSetting.min_trust_level_to_tag_topics = 0
            end

            it "can create all tags if none exist" do
              expect { @post = creator_with_tags.create }.to change { Tag.count }.by(tag_names.size)
              expect(@post.topic.tags.map(&:name).sort).to eq(tag_names.sort)
            end

            it "creates missing tags if some exist" do
              _existing_tag1 = Fabricate(:tag, name: tag_names[0])
              _existing_tag1 = Fabricate(:tag, name: tag_names[1])
              expect { @post = creator_with_tags.create }.to change { Tag.count }.by(
                tag_names.size - 2,
              )
              expect(@post.topic.tags.map(&:name).sort).to eq(tag_names.sort)
            end
          end

          context "when cannot create tags" do
            before do
              SiteSetting.min_trust_to_create_tag = 4
              SiteSetting.min_trust_level_to_tag_topics = 0
            end

            it "only uses existing tags" do
              existing_tag1 = Fabricate(:tag, name: tag_names[1])
              expect { @post = creator_with_tags.create }.not_to change { Tag.count }
              expect(@post.topic.tags.map(&:name)).to eq([existing_tag1.name])
            end
          end

          context "when automatically tagging first posts" do
            before do
              SiteSetting.min_trust_to_create_tag = 0
              SiteSetting.min_trust_level_to_tag_topics = 0
              Fabricate(:tag, name: "greetings")
              Fabricate(:tag, name: "hey")
              Fabricate(:tag, name: "about-art")
              Fabricate(:tag, name: "about-artists")
            end

            context "without regular expressions" do
              it "works with many tags" do
                Fabricate(
                  :watched_word,
                  action: WatchedWord.actions[:tag],
                  word: "HELLO",
                  replacement: "greetings,hey",
                )

                @post = creator.create
                expect(@post.topic.tags.map(&:name)).to match_array(%w[greetings hey])
              end

              it "works with overlapping words" do
                Fabricate(
                  :watched_word,
                  action: WatchedWord.actions[:tag],
                  word: "art",
                  replacement: "about-art",
                )
                Fabricate(
                  :watched_word,
                  action: WatchedWord.actions[:tag],
                  word: "artist*",
                  replacement: "about-artists",
                )

                post =
                  PostCreator.new(
                    user,
                    title: "hello world topic",
                    raw: "this is topic abour artists",
                    archetype_id: 1,
                  ).create
                expect(post.topic.tags.map(&:name)).to match_array(["about-artists"])
              end

              it "does not treat as regular expressions" do
                Fabricate(
                  :watched_word,
                  action: WatchedWord.actions[:tag],
                  word: "he(llo|y)",
                  replacement: "greetings,hey",
                )

                @post = creator_with_tags.create
                expect(@post.topic.tags.map(&:name)).to match_array(tag_names)
              end
            end

            context "with regular expressions" do
              it "works" do
                SiteSetting.watched_words_regular_expressions = true
                Fabricate(
                  :watched_word,
                  action: WatchedWord.actions[:tag],
                  word: "he(llo|y)",
                  replacement: "greetings,hey",
                )

                @post = creator_with_tags.create
                expect(@post.topic.tags.map(&:name)).to match_array(tag_names + %w[greetings hey])
              end
            end
          end
        end
      end
    end

    context "when auto-close param is given" do
      it "ensures the user can auto-close the topic, but ignores auto-close param silently" do
        Guardian.any_instance.stubs(:can_moderate?).returns(false)
        expect {
          PostCreator.new(user, basic_topic_params.merge(auto_close_time: 2)).create!
        }.to_not change { TopicTimer.count }
      end
    end
  end

  describe "whisper" do
    fab!(:topic) { Fabricate(:topic, user: user) }

    it "whispers do not mess up the public view" do
      # turns out this can fail on leap years if we don't do this
      freeze_time DateTime.parse("2010-01-01 12:00")

      first = PostCreator.new(user, topic_id: topic.id, raw: "this is the first post").create

      freeze_time 1.year.from_now

      user_stat = user.user_stat

      whisper =
        PostCreator.new(
          user,
          topic_id: topic.id,
          reply_to_post_number: 1,
          post_type: Post.types[:whisper],
          raw: "this is a whispered reply",
        ).create

      # don't count whispers in user stats
      expect(user_stat.reload.post_count).to eq(0)

      expect(whisper).to be_present
      expect(whisper.post_type).to eq(Post.types[:whisper])

      whisper_reply =
        PostCreator.new(
          user,
          topic_id: topic.id,
          reply_to_post_number: whisper.post_number,
          post_type: Post.types[:regular],
          raw: "replying to a whisper this time",
        ).create

      expect(whisper_reply).to be_present
      expect(whisper_reply.post_type).to eq(Post.types[:whisper])

      expect(user_stat.reload.post_count).to eq(0)

      user.reload
      expect(user.last_posted_at).to eq_time(1.year.ago)

      # date is not precise enough in db
      whisper_reply.reload

      first.reload
      # does not leak into the OP
      expect(first.reply_count).to eq(0)

      topic.reload

      # cause whispers should not muck up that number
      expect(topic.highest_post_number).to eq(1)
      expect(topic.reply_count).to eq(0)
      expect(topic.posts_count).to eq(1)
      expect(topic.highest_staff_post_number).to eq(3)
      expect(topic.last_posted_at).to eq_time(first.created_at)
      expect(topic.last_post_user_id).to eq(first.user_id)
      expect(topic.word_count).to eq(5)

      topic.update_columns(
        highest_staff_post_number: 0,
        highest_post_number: 0,
        posts_count: 0,
        last_posted_at: 1.year.ago,
      )

      Topic.reset_highest(topic.id)

      topic.reload
      expect(topic.highest_post_number).to eq(1)
      expect(topic.posts_count).to eq(1)
      expect(topic.last_posted_at).to eq_time(first.created_at)
      expect(topic.highest_staff_post_number).to eq(3)
    end
  end

  describe "silent" do
    fab!(:topic) { Fabricate(:topic, user: user) }

    it "silent do not mess up the public view" do
      freeze_time DateTime.parse("2010-01-01 12:00")

      first = PostCreator.new(user, topic_id: topic.id, raw: "this is the first post").create

      freeze_time 1.year.from_now

      PostCreator.new(
        user,
        topic_id: topic.id,
        reply_to_post_number: 1,
        silent: true,
        post_type: Post.types[:regular],
        raw: "this is a whispered reply",
      ).create

      topic.reload

      # silent post should not muck up that number
      expect(topic.last_posted_at).to eq_time(first.created_at)
      expect(topic.last_post_user_id).to eq(first.user_id)
      expect(topic.word_count).to eq(5)
    end
  end

  describe "uniqueness" do
    fab!(:topic) { Fabricate(:topic, user: user) }
    let(:basic_topic_params) { { raw: "test reply", topic_id: topic.id, reply_to_post_number: 4 } }
    let(:creator) { PostCreator.new(user, basic_topic_params) }

    context "when disabled" do
      before do
        SiteSetting.unique_posts_mins = 0
        creator.create
      end

      it "returns true for another post with the same content" do
        new_creator = PostCreator.new(user, basic_topic_params)
        expect(new_creator.create).to be_present
      end
    end

    context "when enabled" do
      let(:new_post_creator) { PostCreator.new(user, basic_topic_params) }

      before { SiteSetting.unique_posts_mins = 10 }

      it "fails for dupe post across topic" do
        first = create_post(raw: "this is a test #{SecureRandom.hex}")
        second = create_post(raw: "this is a test #{SecureRandom.hex}")

        dupe = "hello 123 test #{SecureRandom.hex}"

        response_1 = PostCreator.create(first.user, raw: dupe, topic_id: first.topic_id)
        response_2 = PostCreator.create(first.user, raw: dupe, topic_id: second.topic_id)

        expect(response_1.errors.count).to eq(0)
        expect(response_2.errors.count).to eq(1)
      end

      it "returns blank for another post with the same content" do
        creator.create
        post = new_post_creator.create

        expect(post.errors[:raw]).to include(I18n.t(:just_posted_that))
      end

      it "returns a post for admins" do
        creator.create
        user.admin = true
        new_post_creator.create
        expect(new_post_creator.errors).to be_blank
      end

      it "returns a post for moderators" do
        creator.create
        user.moderator = true
        new_post_creator.create
        expect(new_post_creator.errors).to be_blank
      end
    end
  end

  describe "host spam" do
    fab!(:topic) { Fabricate(:topic, user: user) }
    let(:basic_topic_params) { { raw: "test reply", topic_id: topic.id, reply_to_post_number: 4 } }
    let(:creator) { PostCreator.new(user, basic_topic_params) }

    before { Post.any_instance.expects(:has_host_spam?).returns(true) }

    it "does not create the post" do
      GroupMessage.stubs(:create)
      _post = creator.create

      expect(creator.errors).to be_present
      expect(creator.spam?).to eq(true)
    end

    it "sends a message to moderators" do
      GroupMessage
        .expects(:create)
        .with do |group_name, msg_type, params|
          group_name == (Group[:moderators].name) && msg_type == (:spam_post_blocked) &&
            params[:user].id == (user.id)
        end
      creator.create
    end

    it "does not create a reviewable post if the review_every_post setting is enabled" do
      SiteSetting.review_every_post = true
      GroupMessage.stubs(:create)

      expect { creator.create }.not_to change(ReviewablePost, :count)
    end
  end

  # more integration testing ... maximise our testing
  describe "existing topic" do
    fab!(:topic) { Fabricate(:topic, user: user, title: "topic title with 25 chars") }
    let(:creator) do
      PostCreator.new(user, raw: "test reply", topic_id: topic.id, reply_to_post_number: 4)
    end

    it "ensures the user can create the post" do
      Guardian.any_instance.expects(:can_create?).with(Post, topic).returns(false)
      post = creator.create
      expect(post).to be_blank
      expect(creator.errors.count).to eq 1
      expect(creator.errors.messages[:base][0]).to match I18n.t(:topic_not_found)
    end

    context "with success" do
      it "create correctly" do
        post = creator.create
        expect(Post.count).to eq(1)
        expect(Topic.count).to eq(1)
        expect(post.reply_to_post_number).to eq(4)
      end
    end

    context "when the user has bookmarks with auto_delete_preference on_owner_reply" do
      before do
        Fabricate(
          :bookmark,
          user: user,
          bookmarkable: Fabricate(:post, topic: topic),
          auto_delete_preference: Bookmark.auto_delete_preferences[:on_owner_reply],
        )
        Fabricate(
          :bookmark,
          user: user,
          bookmarkable: Fabricate(:post, topic: topic),
          auto_delete_preference: Bookmark.auto_delete_preferences[:on_owner_reply],
        )
        TopicUser.create!(topic: topic, user: user, bookmarked: true)
      end

      it "deletes the bookmarks, but not the ones without an auto_delete_preference" do
        Fabricate(:bookmark, bookmarkable: Fabricate(:post, topic: topic), user: user)
        Fabricate(:bookmark, user: user)
        creator.create
        expect(Bookmark.where(user: user).count).to eq(2)
        expect(TopicUser.find_by(topic: topic, user: user).bookmarked).to eq(true)
      end

      context "when there are no bookmarks left in the topic" do
        it "sets TopicUser.bookmarked to false" do
          creator.create
          expect(TopicUser.find_by(topic: topic, user: user).bookmarked).to eq(false)
        end
      end
    end

    context "with topic stats" do
      before do
        PostCreator.new(
          coding_horror,
          raw: "first post in topic",
          topic_id: topic.id,
          created_at: Time.zone.now - 24.hours,
        ).create
      end

      it "updates topic stats" do
        post = creator.create
        topic.reload

        expect(topic.last_posted_at).to eq_time(post.created_at)
        expect(topic.last_post_user_id).to eq(post.user_id)
        expect(topic.word_count).to eq(6)
      end

      it "publishes updates to topic stats" do
        reply_timestamp = 1.day.from_now.round

        # tests if messages of type :stats are published and the relevant data is fetched from the topic
        messages =
          MessageBus.track_publish("/topic/#{topic.id}") do
            PostCreator.new(
              evil_trout,
              raw: "other post in topic",
              topic_id: topic.id,
              created_at: reply_timestamp,
            ).create
          end

        stats_message = messages.select { |msg| msg.data[:type] == :stats }.first
        expect(stats_message).to be_present
        expect(stats_message.data[:posts_count]).to eq(2)
        expect(stats_message.data[:last_posted_at]).to eq(reply_timestamp.as_json)
        expect(stats_message.data[:last_poster]).to eq(
          BasicUserSerializer.new(evil_trout, root: false).as_json,
        )
      end

      it "updates topic stats even when topic fails validation" do
        topic.update_columns(title: "below 15 chars")

        post = creator.create
        topic.reload

        expect(topic.last_posted_at).to eq_time(post.created_at)
        expect(topic.last_post_user_id).to eq(post.user_id)
        expect(topic.word_count).to eq(6)
      end
    end

    context "when the topic is in slow mode" do
      before do
        one_day = 86_400
        topic.update!(slow_mode_seconds: one_day)
      end

      it "fails if the user recently posted in this topic" do
        TopicUser.create!(user: user, topic: topic, last_posted_at: 10.minutes.ago)

        post = creator.create

        expect(post).to be_blank
        expect(creator.errors.count).to eq 1
        expect(creator.errors.messages[:base][0]).to match I18n.t(:slow_mode_enabled)
      end

      it "creates the topic if the user last post is older than the slow mode interval" do
        TopicUser.create!(user: user, topic: topic, last_posted_at: 5.days.ago)

        post = creator.create

        expect(post).to be_present
        expect(creator.errors.count).to be_zero
      end

      it "creates the topic if the user is a staff member" do
        post_creator =
          PostCreator.new(admin, raw: "test reply", topic_id: topic.id, reply_to_post_number: 4)
        TopicUser.create!(user: admin, topic: topic, last_posted_at: 10.minutes.ago)

        post = post_creator.create

        expect(post).to be_present
        expect(post_creator.errors.count).to be_zero
      end
    end
  end

  describe "closed topic" do
    fab!(:topic) { Fabricate(:topic, user: user, closed: true) }
    let(:creator) do
      PostCreator.new(user, raw: "test reply", topic_id: topic.id, reply_to_post_number: 4)
    end

    it "responds with an error message" do
      post = creator.create
      expect(post).to be_blank
      expect(creator.errors.count).to eq 1
      expect(creator.errors.messages[:base][0]).to match I18n.t(:topic_not_found)
    end
  end

  describe "missing topic" do
    let(:topic) { Fabricate(:topic, user: user, deleted_at: 5.minutes.ago) }
    let(:creator) do
      PostCreator.new(user, raw: "test reply", topic_id: topic.id, reply_to_post_number: 4)
    end

    it "responds with an error message" do
      post = creator.create
      expect(post).to be_blank
      expect(creator.errors.count).to eq 1
      expect(creator.errors.messages[:base][0]).to match I18n.t(:topic_not_found)
    end
  end

  describe "cooking options" do
    let(:raw) { "this is my awesome message body hello world" }

    it "passes the cooking options through correctly" do
      creator =
        PostCreator.new(
          user,
          title: "hi there welcome to my topic",
          raw: raw,
          cooking_options: {
            traditional_markdown_linebreaks: true,
          },
        )

      Post
        .any_instance
        .expects(:cook)
        .with(raw, has_key(:traditional_markdown_linebreaks))
        .returns(raw)
      creator.create
    end
  end

  # integration test ... minimise db work
  describe "private message" do
    let(:target_user1) { coding_horror }
    fab!(:target_user2) { Fabricate(:moderator) }
    fab!(:unrelated_user) { Fabricate(:user) }
    let(:post) do
      Group.refresh_automatic_groups!
      PostCreator.create!(
        user,
        title: "hi there welcome to my topic",
        raw: "this is my awesome message @#{unrelated_user.username_lower}",
        archetype: Archetype.private_message,
        target_usernames: [target_user1.username, target_user2.username].join(","),
        category: 1,
      )
    end

    it "acts correctly" do
      freeze_time

      user.update_columns(last_posted_at: 1.year.ago)

      # It's not a warning
      expect(post.topic.user_warning).to be_blank

      expect(post.topic.archetype).to eq(Archetype.private_message)
      expect(post.topic.subtype).to eq(TopicSubtype.user_to_user)
      expect(post.topic.topic_allowed_users.count).to eq(3)

      # PMs can't have a category
      expect(post.topic.category).to eq(nil)

      # does not notify an unrelated user
      expect(unrelated_user.notifications.count).to eq(0)
      expect(post.topic.subtype).to eq(TopicSubtype.user_to_user)

      # PMs do not increase post count or topic count
      expect(post.user.user_stat.post_count).to eq(0)
      expect(post.user.user_stat.topic_count).to eq(0)

      user.reload
      expect(user.last_posted_at).to eq_time(1.year.ago)

      # archive this message and ensure archive is cleared for all users on reply
      UserArchivedMessage.create(user_id: target_user2.id, topic_id: post.topic_id)

      # if an admin replies they should be added to the allowed user list
      PostCreator.create!(admin, raw: "hi there welcome topic, I am a mod", topic_id: post.topic_id)

      post.topic.reload
      expect(post.topic.topic_allowed_users.where(user_id: admin.id).count).to eq(1)

      expect(
        UserArchivedMessage.where(user_id: target_user2.id, topic_id: post.topic_id).count,
      ).to eq(0)

      # if another admin replies and is already member of the group, don't add them to topic_allowed_users
      group = Fabricate(:group)
      post.topic.topic_allowed_groups.create!(group: group)
      admin2 = Fabricate(:admin)
      group.add(admin2)

      PostCreator.create!(admin2, raw: "I am also an admin, and a mod", topic_id: post.topic_id)

      expect(post.topic.topic_allowed_users.where(user_id: admin2.id).count).to eq(0)
    end

    it "does not add whisperers to allowed users of the topic" do
      SiteSetting.whispers_allowed_groups = "#{Group::AUTO_GROUPS[:staff]}"
      unrelated_user.update!(admin: true)

      PostCreator.create!(
        unrelated_user,
        raw: "This is a whisper that I am testing",
        topic_id: post.topic_id,
        post_type: Post.types[:whisper],
      )

      expect(post.topic.topic_allowed_users.map(&:user_id)).to contain_exactly(
        target_user1.id,
        target_user2.id,
        user.id,
      )
    end

    it "does not add whisperers to allowed users of the topic" do
      unrelated_user.update!(admin: true)

      PostCreator.create!(
        unrelated_user,
        raw: "This is a whisper that I am testing",
        topic_id: post.topic_id,
        post_type: Post.types[:small_action],
      )

      expect(post.topic.topic_allowed_users.map(&:user_id)).to contain_exactly(
        target_user1.id,
        target_user2.id,
        user.id,
      )
    end

    it "does not increase posts count for small actions" do
      topic = Fabricate(:private_message_topic, user: Fabricate(:user))

      Fabricate(:post, topic: topic)

      1.upto(3) do |i|
        user = Fabricate(:user)
        Group.refresh_automatic_groups!
        topic.invite(topic.user, user.username)
        topic.reload
        expect(topic.posts_count).to eq(1)
        expect(topic.posts.where(post_type: Post.types[:small_action]).count).to eq(i)
      end

      Fabricate(:post, topic: topic)
      Topic.reset_highest(topic.id)
      expect(topic.reload.posts_count).to eq(2)

      Fabricate(:post, topic: topic)
      Topic.reset_all_highest!
      expect(topic.reload.posts_count).to eq(3)
    end
  end

  describe "warnings" do
    let(:target_user1) { coding_horror }
    fab!(:target_user2) { Fabricate(:moderator) }
    let(:base_args) do
      {
        title: "you need a warning buddy!",
        raw: "you did something bad and I'm telling you about it!",
        is_warning: true,
        target_usernames: target_user1.username,
        category: 1,
      }
    end

    it "works as expected" do
      Group.refresh_automatic_groups!
      # Invalid archetype
      creator = PostCreator.new(user, base_args)
      creator.create
      expect(creator.errors).to be_present

      # Too many users
      creator =
        PostCreator.new(
          user,
          base_args.merge(
            archetype: Archetype.private_message,
            target_usernames: [target_user1.username, target_user2.username].join(","),
          ),
        )
      creator.create
      expect(creator.errors).to be_present

      # Success
      creator = PostCreator.new(user, base_args.merge(archetype: Archetype.private_message))
      post = creator.create
      expect(creator.errors).to be_blank

      topic = post.topic
      expect(topic).to be_present
      expect(topic.user_warning).to be_present
      expect(topic.subtype).to eq(TopicSubtype.moderator_warning)
      expect(topic.user_warning.user).to eq(target_user1)
      expect(topic.user_warning.created_by).to eq(user)
      expect(target_user1.user_warnings.count).to eq(1)
    end
  end

  describe "auto closing" do
    it "closes private messages that have more than N posts" do
      SiteSetting.auto_close_messages_post_count = 2

      post1 = create_post(archetype: Archetype.private_message, target_usernames: [admin.username])

      expect do create_post(user: post1.user, topic_id: post1.topic_id) end.to change {
        Post.count
      }.by(2)

      post1.topic.reload

      expect(post1.topic.posts.last.raw).to eq(
        I18n.t(
          "topic_statuses.autoclosed_message_max_posts",
          count: SiteSetting.auto_close_messages_post_count,
        ),
      )

      expect(post1.topic.closed).to eq(true)
    end

    it "closes topics that have more than N posts" do
      SiteSetting.auto_close_topics_post_count = 2

      post1 = create_post

      expect do create_post(user: post1.user, topic_id: post1.topic_id) end.to change {
        Post.count
      }.by(2)

      post1.topic.reload

      expect(post1.topic.posts.last.raw).to eq(
        I18n.t(
          "topic_statuses.autoclosed_topic_max_posts",
          count: SiteSetting.auto_close_topics_post_count,
        ),
      )

      expect(post1.topic.closed).to eq(true)
    end
  end

  describe "private message to group" do
    fab!(:target_user1) { coding_horror }
    fab!(:target_user2) { Fabricate(:moderator) }
    let!(:group) do
      g = Fabricate.build(:group, messageable_level: Group::ALIAS_LEVELS[:everyone])
      g.add(target_user1)
      g.add(target_user2)
      g.save
      g
    end
    fab!(:unrelated) { Fabricate(:user) }
    let(:post) do
      Group.refresh_automatic_groups!
      PostCreator.create!(
        user,
        title: "hi there welcome to my topic",
        raw: "this is my awesome message @#{unrelated.username_lower}",
        archetype: Archetype.private_message,
        target_group_names: group.name,
      )
    end

    it "can post to a group correctly" do
      Jobs.run_immediately!

      expect(post.topic.archetype).to eq(Archetype.private_message)
      expect(post.topic.topic_allowed_users.count).to eq(1)
      expect(post.topic.topic_allowed_groups.count).to eq(1)

      # does not notify an unrelated user
      expect(unrelated.notifications.count).to eq(0)
      expect(post.topic.subtype).to eq(TopicSubtype.user_to_user)

      expect(target_user1.notifications.count).to eq(1)
      expect(target_user2.notifications.count).to eq(1)

      GroupArchivedMessage.create!(group: group, topic: post.topic)

      message =
        MessageBus
          .track_publish(PrivateMessageTopicTrackingState.group_channel(group.id)) do
            PostCreator.create!(
              user,
              raw: "this is a reply to the group message",
              topic_id: post.topic_id,
            )
          end
          .first

      expect(message.data["message_type"]).to eq(
        PrivateMessageTopicTrackingState::GROUP_ARCHIVE_MESSAGE_TYPE,
      )

      expect(message.data["payload"]["acting_user_id"]).to eq(user.id)

      expect(GroupArchivedMessage.exists?(group: group, topic: post.topic)).to eq(false)
    end
  end

  describe "setting created_at" do
    it "supports Time instances" do
      freeze_time

      post1 =
        PostCreator.create(
          user,
          raw: "This is very interesting test post content",
          title: "This is a very interesting test post title",
          created_at: 1.week.ago,
        )
      topic = post1.topic

      post2 =
        PostCreator.create(
          user,
          raw: "This is very interesting test post content",
          topic_id: topic,
          created_at: 1.week.ago,
        )

      expect(post1.created_at).to eq_time(1.week.ago)
      expect(post2.created_at).to eq_time(1.week.ago)
      expect(topic.created_at).to eq_time(1.week.ago)
    end

    it "supports strings" do
      freeze_time

      time = Time.zone.parse("2019-09-02")

      post1 =
        PostCreator.create(
          user,
          raw: "This is very interesting test post content",
          title: "This is a very interesting test post title",
          created_at: "2019-09-02",
        )
      topic = post1.topic

      post2 =
        PostCreator.create(
          user,
          raw: "This is very interesting test post content",
          topic_id: topic,
          created_at: "2019-09-02 00:00:00 UTC",
        )

      expect(post1.created_at).to eq_time(time)
      expect(post2.created_at).to eq_time(time)
      expect(topic.created_at).to eq_time(time)
    end
  end

  describe "disable validations" do
    it "can save a post" do
      creator = PostCreator.new(user, raw: "q", title: "q", skip_validations: true)
      creator.create
      expect(creator.errors).to be_blank
    end
  end

  describe "word_count" do
    it "has a word count" do
      creator =
        PostCreator.new(
          user,
          title: "some inspired poetry for a rainy day",
          raw:
            "mary had a little lamb, little lamb, little lamb. mary had a little lamb. Здравствуйте",
        )
      post = creator.create
      expect(post.word_count).to eq(15)

      post.topic.reload
      expect(post.topic.word_count).to eq(15)
    end
  end

  describe "embed_url" do
    let(:embed_url) { "http://eviltrout.com/stupid-url" }

    it "creates the topic_embed record" do
      creator =
        PostCreator.new(
          user,
          embed_url: embed_url,
          title: "Reviews of Science Ovens",
          raw: "Did you know that you can use microwaves to cook your dinner? Science!",
        )
      creator.create
      expect(creator.errors).to be_blank
      expect(TopicEmbed.where(embed_url: embed_url).exists?).to eq(true)

      # If we try to create another topic with the embed url, should fail
      creator =
        PostCreator.new(
          user,
          embed_url: embed_url,
          title: "More Reviews of Science Ovens",
          raw: "As if anyone ever wanted to learn more about them!",
        )
      result = creator.create
      expect(result).to be_present
      expect(creator.errors).to be_present
    end
  end

  describe "read credit for creator" do
    it "should give credit to creator" do
      post = create_post
      expect(
        PostTiming.find_by(
          topic_id: post.topic_id,
          post_number: post.post_number,
          user_id: post.user_id,
        ).msecs,
      ).to be > 0

      expect(
        TopicUser.find_by(topic_id: post.topic_id, user_id: post.user_id).last_read_post_number,
      ).to eq(1)
    end
  end

  describe "suspended users" do
    it "does not allow suspended users to create topics" do
      user = Fabricate(:user, suspended_at: 1.month.ago, suspended_till: 1.month.from_now)

      creator =
        PostCreator.new(user, title: "my test title 123", raw: "I should not be allowed to post")
      creator.create
      expect(creator.errors.count).to be > 0
    end
  end

  it "doesn't strip starting whitespaces" do
    pc =
      PostCreator.new(
        user,
        title: "testing whitespace stripping",
        raw: "    <-- whitespaces -->    ",
      )
    post = pc.create
    expect(post.raw).to eq("    <-- whitespaces -->")
  end

  describe "events" do
    before do
      @posts_created = 0
      @topics_created = 0

      @increase_posts = ->(post, opts, user) { @posts_created += 1 }
      @increase_topics = ->(topic, opts, user) { @topics_created += 1 }
      DiscourseEvent.on(:post_created, &@increase_posts)
      DiscourseEvent.on(:topic_created, &@increase_topics)
    end

    after do
      DiscourseEvent.off(:post_created, &@increase_posts)
      DiscourseEvent.off(:topic_created, &@increase_topics)
    end

    it "fires both event when creating a topic" do
      pc =
        PostCreator.new(
          user,
          raw: "this is the new content for my topic",
          title: "this is my new topic title",
        )
      _post = pc.create
      expect(@posts_created).to eq(1)
      expect(@topics_created).to eq(1)
    end

    it "fires only the post event when creating a post" do
      pc = PostCreator.new(user, topic_id: topic.id, raw: "this is the new content for my post")
      _post = pc.create
      expect(@posts_created).to eq(1)
      expect(@topics_created).to eq(0)
    end
  end

  describe "staged users" do
    fab!(:staged) { Fabricate(:staged) }

    it "automatically watches all messages it participates in" do
      post =
        PostCreator.create(
          staged,
          title: "this is the title of a topic created by a staged user",
          raw: "this is the content of a topic created by a staged user ;)",
        )
      topic_user = TopicUser.find_by(user_id: staged.id, topic_id: post.topic_id)
      expect(topic_user.notification_level).to eq(TopicUser.notification_levels[:watching])
      expect(topic_user.notifications_reason_id).to eq(TopicUser.notification_reasons[:auto_watch])
    end
  end

  describe "topic tracking" do
    it "automatically watches topic based on preference" do
      user.user_option.notification_level_when_replying = 3

      topic =
        PostCreator.create(
          admin,
          title: "this is the title of a topic created by an admin for watching notification",
          raw:
            "this is the content of a topic created by an admin for keeping a watching notification state on a topic ;)",
        )

      post =
        PostCreator.create(
          user,
          topic_id: topic.topic_id,
          raw: "this is a reply to set the tracking state to watching ;)",
        )
      topic_user = TopicUser.find_by(user_id: user.id, topic_id: post.topic_id)
      expect(topic_user.notification_level).to eq(TopicUser.notification_levels[:watching])
    end

    it "topic notification level remains tracking based on preference" do
      user.user_option.notification_level_when_replying = 2

      topic =
        PostCreator.create(
          admin,
          title: "this is the title of a topic created by an admin for tracking notification",
          raw:
            "this is the content of a topic created by an admin for keeping a tracking notification state on a topic ;)",
        )

      post =
        PostCreator.create(
          user,
          topic_id: topic.topic_id,
          raw: "this is a reply to set the tracking state to tracking ;)",
        )
      topic_user = TopicUser.find_by(user_id: user.id, topic_id: post.topic_id)
      expect(topic_user.notification_level).to eq(TopicUser.notification_levels[:tracking])
    end

    it "topic notification level is normal based on preference" do
      user.user_option.notification_level_when_replying = 1

      topic =
        PostCreator.create(
          admin,
          title: "this is the title of a topic created by an admin for tracking notification",
          raw:
            "this is the content of a topic created by an admin for keeping a tracking notification state on a topic ;)",
        )

      post =
        PostCreator.create(
          user,
          topic_id: topic.topic_id,
          raw: "this is a reply to set the tracking state to normal ;)",
        )
      topic_user = TopicUser.find_by(user_id: user.id, topic_id: post.topic_id)
      expect(topic_user.notification_level).to eq(TopicUser.notification_levels[:regular])
    end

    it "user preferences for notification level when replying doesn't affect PMs" do
      user.user_option.update!(notification_level_when_replying: 1)

      pm = Fabricate(:private_message_topic, user: admin)

      pm.invite(admin, user.username)
      PostCreator.create(user, topic_id: pm.id, raw: "this is a test reply 123 123 ;)")
      topic_user = TopicUser.find_by(user_id: user.id, topic_id: pm.id)
      expect(topic_user.notification_level).to eq(3)
    end

    it "sets the last_posted_at timestamp to track the last time the user posted" do
      topic = Fabricate(:topic)

      PostCreator.create(user, topic_id: topic.id, raw: "this is a test reply 123 123 ;)")

      topic_user = TopicUser.find_by(user_id: user.id, topic_id: topic.id)
      expect(topic_user.last_posted_at).to be_present
    end
  end

  describe "#create!" do
    it "should return the post if it was successfully created" do
      title = "This is a valid title"
      raw = "This is a really awesome post"

      post_creator = PostCreator.new(user, title: title, raw: raw)
      post = post_creator.create

      expect(post).to eq(Post.last)
      expect(post.topic.title).to eq(title)
      expect(post.raw).to eq(raw)
    end

    it "should raise an error when post fails to be created" do
      post_creator = PostCreator.new(user, title: "", raw: "")
      expect { post_creator.create! }.to raise_error(ActiveRecord::RecordNotSaved)
    end

    it "does not generate an alert for empty posts" do
      Jobs.run_immediately!

      user2 = Fabricate(:user)
      topic =
        Fabricate(
          :private_message_topic,
          topic_allowed_users: [
            Fabricate.build(:topic_allowed_user, user: user),
            Fabricate.build(:topic_allowed_user, user: user2),
          ],
        )
      Fabricate(
        :topic_user,
        topic: topic,
        user: user2,
        notification_level: TopicUser.notification_levels[:watching],
      )

      expect {
        PostCreator.create!(user, raw: "", topic_id: topic.id, skip_validations: true)
      }.not_to change { user2.notifications.count }

      expect {
        PostCreator.create!(user, raw: "hello world", topic_id: topic.id, skip_validations: true)
      }.to change { user2.notifications.count }.by(1)
    end
  end

  describe "private message to a user that has disabled private messages" do
    fab!(:another_user) { Fabricate(:user, username: "HelloWorld") }

    before { another_user.user_option.update!(allow_private_messages: false) }

    it "should not be valid" do
      post_creator =
        PostCreator.new(
          user,
          title: "this message is to someone who muted me!",
          raw: "you will have to see this even if you muted me!",
          archetype: Archetype.private_message,
          target_usernames: "#{another_user.username}",
        )

      expect(post_creator).to_not be_valid

      expect(post_creator.errors.full_messages).to include(
        I18n.t("not_accepting_pms", username: another_user.username),
      )
    end

    it "should not be valid if the name is downcased" do
      post_creator =
        PostCreator.new(
          user,
          title: "this message is to someone who muted me!",
          raw: "you will have to see this even if you muted me!",
          archetype: Archetype.private_message,
          target_usernames: "#{another_user.username.downcase}",
        )

      expect(post_creator).to_not be_valid
    end
  end

  describe "private message to a muted user" do
    fab!(:muted_me) { evil_trout }
    fab!(:another_user) { Fabricate(:user) }

    it "should fail" do
      updater = UserUpdater.new(muted_me, muted_me)
      updater.update_muted_users("#{user.username}")

      pc =
        PostCreator.new(
          user,
          title: "this message is to someone who muted me!",
          raw: "you will have to see this even if you muted me!",
          archetype: Archetype.private_message,
          target_usernames: "#{muted_me.username},#{another_user.username}",
        )

      expect(pc).not_to be_valid

      expect(pc.errors.full_messages).to contain_exactly(
        I18n.t(:not_accepting_pms, username: muted_me.username),
      )
    end

    fab!(:staff_user) { Fabricate(:admin) }

    it "succeeds if the user is staff" do
      updater = UserUpdater.new(muted_me, muted_me)
      updater.update_muted_users("#{staff_user.username}")

      pc =
        PostCreator.new(
          staff_user,
          title: "this message is to someone who muted me!",
          raw: "you will have to see this even if you muted me!",
          archetype: Archetype.private_message,
          target_usernames: "#{muted_me.username}",
        )
      expect(pc).to be_valid
      expect(pc.errors).to be_blank
    end
  end

  describe "private message to an ignored user" do
    fab!(:ignorer) { evil_trout }
    fab!(:another_user) { Fabricate(:user) }

    context "when post author is ignored" do
      let!(:ignored_user) { Fabricate(:ignored_user, user: ignorer, ignored_user: user) }

      it "should fail" do
        pc =
          PostCreator.new(
            user,
            title: "this message is to someone who ignored me!",
            raw: "you will have to see this even if you ignored me!",
            archetype: Archetype.private_message,
            target_usernames: "#{ignorer.username},#{another_user.username}",
          )

        expect(pc).not_to be_valid
        expect(pc.errors.full_messages).to contain_exactly(
          I18n.t(:not_accepting_pms, username: ignorer.username),
        )
      end
    end

    context "when post author is admin who is ignored" do
      fab!(:staff_user) { Fabricate(:admin) }
      fab!(:ignored_user) { Fabricate(:ignored_user, user: ignorer, ignored_user: staff_user) }

      it "succeeds if the user is staff" do
        pc =
          PostCreator.new(
            staff_user,
            title: "this message is to someone who ignored me!",
            raw: "you will have to see this even if you ignored me!",
            archetype: Archetype.private_message,
            target_usernames: "#{ignorer.username}",
          )
        expect(pc).to be_valid
        expect(pc.errors).to be_blank
      end
    end
  end

  describe "private message to user in allow list" do
    fab!(:sender) { evil_trout }
    fab!(:allowed_user) { Fabricate(:user) }

    context "when post author is allowed" do
      let!(:allowed_pm_user) do
        Fabricate(:allowed_pm_user, user: allowed_user, allowed_pm_user: sender)
      end

      it "should succeed" do
        allowed_user.user_option.update!(enable_allowed_pm_users: true)

        pc =
          PostCreator.new(
            sender,
            title: "this message is to someone who is in my allow list!",
            raw: "you will have to see this because I'm in your allow list!",
            archetype: Archetype.private_message,
            target_usernames: "#{allowed_user.username}",
          )

        expect(pc).to be_valid
        expect(pc.errors).to be_blank
      end
    end

    context "when personal messages are disabled" do
      let!(:allowed_pm_user) do
        Fabricate(:allowed_pm_user, user: allowed_user, allowed_pm_user: sender)
      end

      it "should fail" do
        allowed_user.user_option.update!(allow_private_messages: false)
        allowed_user.user_option.update!(enable_allowed_pm_users: true)

        pc =
          PostCreator.new(
            sender,
            title: "this message is to someone who is in my allow list!",
            raw: "you will have to see this because I'm in your allow list!",
            archetype: Archetype.private_message,
            target_usernames: "#{allowed_user.username}",
          )

        expect(pc).not_to be_valid
        expect(pc.errors.full_messages).to contain_exactly(
          I18n.t(:not_accepting_pms, username: allowed_user.username),
        )
      end
    end
  end

  describe "private message to user not in allow list" do
    fab!(:sender) { evil_trout }
    fab!(:allowed_user) { Fabricate(:user) }
    fab!(:not_allowed_user) { Fabricate(:user) }

    context "when post author is not allowed" do
      let!(:allowed_pm_user) do
        Fabricate(:allowed_pm_user, user: not_allowed_user, allowed_pm_user: allowed_user)
      end

      it "should fail" do
        not_allowed_user.user_option.update!(enable_allowed_pm_users: true)

        pc =
          PostCreator.new(
            sender,
            title: "this message is to someone who is not in my allowed list!",
            raw: "you will have to see this even if you don't want message from me!",
            archetype: Archetype.private_message,
            target_usernames: "#{not_allowed_user.username}",
          )

        expect(pc).not_to be_valid
        expect(pc.errors.full_messages).to contain_exactly(
          I18n.t(:not_accepting_pms, username: not_allowed_user.username),
        )
      end

      it "should succeed when not enabled" do
        not_allowed_user.user_option.update!(enable_allowed_pm_users: false)

        pc =
          PostCreator.new(
            sender,
            title: "this message is to someone who is not in my allowed list!",
            raw: "you will have to see this even if you don't want message from me!",
            archetype: Archetype.private_message,
            target_usernames: "#{not_allowed_user.username}",
          )

        expect(pc).to be_valid
        expect(pc.errors).to be_blank
      end
    end
  end

  describe "private message when post author is admin who is not in allow list" do
    fab!(:staff_user) { Fabricate(:admin) }
    fab!(:allowed_user) { Fabricate(:user) }
    fab!(:not_allowed_user) { Fabricate(:user) }
    fab!(:allowed_pm_user) do
      Fabricate(:allowed_pm_user, user: staff_user, allowed_pm_user: allowed_user)
    end

    it "succeeds if the user is staff" do
      pc =
        PostCreator.new(
          staff_user,
          title: "this message is to someone who did not allow me!",
          raw: "you will have to see this even if you did not allow me!",
          archetype: Archetype.private_message,
          target_usernames: "#{not_allowed_user.username}",
        )
      expect(pc).to be_valid
      expect(pc.errors).to be_blank
    end
  end

  describe "private message to multiple users and one is not allowed" do
    fab!(:sender) { evil_trout }
    fab!(:allowed_user) { Fabricate(:user) }
    fab!(:not_allowed_user) { Fabricate(:user) }

    context "when post author is not allowed" do
      let!(:allowed_pm_user) do
        Fabricate(:allowed_pm_user, user: allowed_user, allowed_pm_user: sender)
      end

      it "should fail" do
        allowed_user.user_option.update!(enable_allowed_pm_users: true)
        not_allowed_user.user_option.update!(enable_allowed_pm_users: true)

        pc =
          PostCreator.new(
            sender,
            title: "this message is to someone who is not in my allowed list!",
            raw: "you will have to see this even if you don't want message from me!",
            archetype: Archetype.private_message,
            target_usernames: "#{allowed_user.username},#{not_allowed_user.username}",
          )

        expect(pc).not_to be_valid
        expect(pc.errors.full_messages).to contain_exactly(
          I18n.t(:not_accepting_pms, username: not_allowed_user.username),
        )
      end
    end
  end

  describe "private message recipients limit (max_allowed_message_recipients) reached" do
    fab!(:target_user1) { coding_horror }
    fab!(:target_user2) { evil_trout }
    fab!(:target_user3) { Fabricate(:walter_white) }

    before { SiteSetting.max_allowed_message_recipients = 2 }

    context "for normal user" do
      it "fails when sending message to multiple recipients" do
        pc =
          PostCreator.new(
            user,
            title: "this message is for multiple recipients!",
            raw: "Lorem ipsum dolor sit amet, id elitr praesent mea, ut ius facilis fierent.",
            archetype: Archetype.private_message,
            target_usernames: [
              target_user1.username,
              target_user2.username,
              target_user3.username,
            ].join(","),
          )
        expect(pc).not_to be_valid
        expect(pc.errors).to be_present
      end

      it "succeeds when sending message to multiple recipients if skip_validations is true" do
        pc =
          PostCreator.new(
            user,
            title: "this message is for multiple recipients!",
            raw: "Lorem ipsum dolor sit amet, id elitr praesent mea, ut ius facilis fierent.",
            archetype: Archetype.private_message,
            target_usernames: [
              target_user1.username,
              target_user2.username,
              target_user3.username,
            ].join(","),
            skip_validations: true,
          )
        expect(pc).to be_valid
        expect(pc.errors).to be_blank
      end
    end

    context "if the user is staff" do
      fab!(:staff_user) { Fabricate(:admin) }

      it "succeeds when sending message to multiple recipients" do
        pc =
          PostCreator.new(
            staff_user,
            title: "this message is for multiple recipients!",
            raw: "Lorem ipsum dolor sit amet, id elitr praesent mea, ut ius facilis fierent.",
            archetype: Archetype.private_message,
            target_usernames: [
              target_user1.username,
              target_user2.username,
              target_user3.username,
            ].join(","),
          )
        expect(pc).to be_valid
        expect(pc.errors).to be_blank
      end
    end
  end

  describe "#create_post_notice" do
    fab!(:user) { Fabricate(:user) }
    fab!(:staged) { Fabricate(:staged) }
    fab!(:anonymous) { Fabricate(:anonymous) }

    it "generates post notices for new users" do
      post =
        PostCreator.create!(user, title: "one of my first topics", raw: "one of my first posts")
      expect(post.custom_fields[Post::NOTICE]).to eq("type" => Post.notices[:new_user])

      post =
        PostCreator.create!(
          user,
          title: "another one of my first topics",
          raw: "another one of my first posts",
        )
      expect(post.custom_fields[Post::NOTICE]).to eq(nil)
    end

    it "generates post notices for returning users" do
      SiteSetting.returning_users_days = 30
      old_post = Fabricate(:post, user: user, created_at: 31.days.ago)

      post = PostCreator.create!(user, title: "this is a returning topic", raw: "this is a post")
      expect(post.custom_fields[Post::NOTICE]).to eq(
        "type" => Post.notices[:returning_user],
        "last_posted_at" => old_post.created_at.iso8601,
      )

      post =
        PostCreator.create!(user, title: "this is another topic", raw: "this is my another post")
      expect(post.custom_fields[Post::NOTICE]).to eq(nil)
    end

    it "does not generate for non-human, staged or anonymous users" do
      SiteSetting.allow_anonymous_posting = true

      [anonymous, Discourse.system_user, staged].each do |user|
        expect(user.posts.size).to eq(0)
        post =
          PostCreator.create!(
            user,
            title: "#{user.username}'s first topic",
            raw: "#{user.name}'s first post",
          )
        expect(post.custom_fields[Post::NOTICE]).to eq(nil)
      end
    end
  end

  describe "secure uploads uploads" do
    fab!(:image_upload) { Fabricate(:upload, secure: true) }
    fab!(:user2) { Fabricate(:user) }
    fab!(:public_topic) { Fabricate(:topic) }

    before do
      setup_s3
      SiteSetting.authorized_extensions = "png|jpg|gif|mp4"
      SiteSetting.secure_uploads = true
      stub_upload(image_upload)
    end

    it "links post uploads" do
      _public_post =
        PostCreator.create(
          user,
          topic_id: public_topic.id,
          raw: "A public post with an image.\n![](#{image_upload.short_path})",
        )
    end
  end

  describe "queue for review" do
    before { SiteSetting.review_every_post = true }

    it "created a reviewable post after creating the post" do
      title = "This is a valid title"
      raw = "This is a really awesome post"

      post_creator = PostCreator.new(user, title: title, raw: raw)

      expect { post_creator.create }.to change(ReviewablePost, :count).by(1)
    end

    it "does not create a reviewable post if the post is not valid" do
      post_creator = PostCreator.new(user, title: "", raw: "")

      expect { post_creator.create }.not_to change(ReviewablePost, :count)
    end
  end
end