From f3a12ddfd0b5b9379c7cfe4229697765851f4738 Mon Sep 17 00:00:00 2001
From: Jakub Mendyk <jakubmendyk.szkola+git@gmail.com>
Date: Sun, 26 Aug 2018 21:30:17 +0200
Subject: [PATCH] Make Api::V1::MutesController paginate properly (#8472)

Fixes #8463
---
 app/controllers/api/v1/mutes_controller.rb    | 26 ++++-----
 .../api/v1/mutes_controller_spec.rb           | 56 ++++++++++++++++---
 2 files changed, 61 insertions(+), 21 deletions(-)

diff --git a/app/controllers/api/v1/mutes_controller.rb b/app/controllers/api/v1/mutes_controller.rb
index faa7d16cd..df6c8e86c 100644
--- a/app/controllers/api/v1/mutes_controller.rb
+++ b/app/controllers/api/v1/mutes_controller.rb
@@ -15,19 +15,17 @@ class Api::V1::MutesController < Api::BaseController
   private
 
   def load_accounts
-    default_accounts.merge(paginated_mutes).to_a
-  end
-
-  def default_accounts
-    Account.includes(:muted_by).references(:muted_by)
+    paginated_mutes.map(&:target_account)
   end
 
   def paginated_mutes
-    Mute.where(account: current_account).paginate_by_max_id(
-      limit_param(DEFAULT_ACCOUNTS_LIMIT),
-      params[:max_id],
-      params[:since_id]
-    )
+    @paginated_mutes ||= Mute.eager_load(:target_account)
+                             .where(account: current_account)
+                             .paginate_by_max_id(
+                               limit_param(DEFAULT_ACCOUNTS_LIMIT),
+                               params[:max_id],
+                               params[:since_id]
+                             )
   end
 
   def insert_pagination_headers
@@ -41,21 +39,21 @@ class Api::V1::MutesController < Api::BaseController
   end
 
   def prev_path
-    unless @accounts.empty?
+    unless paginated_mutes.empty?
       api_v1_mutes_url pagination_params(since_id: pagination_since_id)
     end
   end
 
   def pagination_max_id
-    @accounts.last.muted_by_ids.last
+    paginated_mutes.last.id
   end
 
   def pagination_since_id
-    @accounts.first.muted_by_ids.first
+    paginated_mutes.first.id
   end
 
   def records_continue?
-    @accounts.size == limit_param(DEFAULT_ACCOUNTS_LIMIT)
+    paginated_mutes.size == limit_param(DEFAULT_ACCOUNTS_LIMIT)
   end
 
   def pagination_params(core_params)
diff --git a/spec/controllers/api/v1/mutes_controller_spec.rb b/spec/controllers/api/v1/mutes_controller_spec.rb
index f9603b7ff..a2b814a69 100644
--- a/spec/controllers/api/v1/mutes_controller_spec.rb
+++ b/spec/controllers/api/v1/mutes_controller_spec.rb
@@ -3,19 +3,61 @@ require 'rails_helper'
 RSpec.describe Api::V1::MutesController, type: :controller do
   render_views
 
-  let(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
-  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'read:mutes') }
+  let(:user)   { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let(:scopes) { 'read:mutes' }
+  let(:token)  { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
 
-  before do
-    Fabricate(:mute, account: user.account, hide_notifications: false)
-    allow(controller).to receive(:doorkeeper_token) { token }
-  end
+  before { allow(controller).to receive(:doorkeeper_token) { token } }
 
   describe 'GET #index' do
-    it 'returns http success' do
+    it 'limits according to limit parameter' do
+      2.times.map { Fabricate(:mute, account: user.account) }
       get :index, params: { limit: 1 }
+      expect(body_as_json.size).to eq 1
+    end
 
+    it 'queries mutes in range according to max_id' do
+      mutes = 2.times.map { Fabricate(:mute, account: user.account) }
+
+      get :index, params: { max_id: mutes[1] }
+
+      expect(body_as_json.size).to eq 1
+      expect(body_as_json[0][:id]).to eq mutes[0].target_account_id.to_s
+    end
+
+    it 'queries mutes in range according to since_id' do
+      mutes = 2.times.map { Fabricate(:mute, account: user.account) }
+
+      get :index, params: { since_id: mutes[0] }
+
+      expect(body_as_json.size).to eq 1
+      expect(body_as_json[0][:id]).to eq mutes[1].target_account_id.to_s
+    end
+
+    it 'sets pagination header for next path' do
+      mutes = 2.times.map { Fabricate(:mute, account: user.account) }
+      get :index, params: { limit: 1, since_id: mutes[0] }
+      expect(response.headers['Link'].find_link(['rel', 'next']).href).to eq api_v1_mutes_url(limit: 1, max_id: mutes[1])
+    end
+
+    it 'sets pagination header for previous path' do
+      mute = Fabricate(:mute, account: user.account)
+      get :index
+      expect(response.headers['Link'].find_link(['rel', 'prev']).href).to eq api_v1_mutes_url(since_id: mute)
+    end
+
+    it 'returns http success' do
+      get :index
       expect(response).to have_http_status(200)
     end
+
+    context 'with wrong scopes' do
+      let(:scopes) { 'write:mutes' }
+
+      it 'returns http forbidden' do
+        get :index
+        expect(response).to have_http_status(403)
+      end
+    end
   end
 end