Add API to get multiple accounts and statuses (#27871)

Co-authored-by: noellabo <noel.yoshiba@gmail.com>

app/controllers/api/v1/accounts_controller.rb

@@ -9,16 +9,22 @@ class Api::V1::AccountsController < Api::BaseController
   before_action -> { doorkeeper_authorize! :follow, :write, :'write:blocks' }, only: [:block, :unblock]
   before_action -> { doorkeeper_authorize! :write, :'write:accounts' }, only: [:create]
 
-  before_action :require_user!, except: [:show, :create]
-  before_action :set_account, except: [:create]
-  before_action :check_account_approval, except: [:create]
-  before_action :check_account_confirmation, except: [:create]
+  before_action :require_user!, except: [:index, :show, :create]
+  before_action :set_account, except: [:index, :create]
+  before_action :set_accounts, only: [:index]
+  before_action :check_account_approval, except: [:index, :create]
+  before_action :check_account_confirmation, except: [:index, :create]
   before_action :check_enabled_registrations, only: [:create]
+  before_action :check_accounts_limit, only: [:index]
 
   skip_before_action :require_authenticated_user!, only: :create
 
   override_rate_limit_headers :follow, family: :follows
 
+  def index
+    render json: @accounts, each_serializer: REST::AccountSerializer
+  end
+
   def show
     cache_if_unauthenticated!
     render json: @account, serializer: REST::AccountSerializer
@@ -79,6 +85,10 @@ class Api::V1::AccountsController < Api::BaseController
     @account = Account.find(params[:id])
   end
 
+  def set_accounts
+    @accounts = Account.where(id: account_ids).without_unapproved
+  end
+
   def check_account_approval
     raise(ActiveRecord::RecordNotFound) if @account.local? && @account.user_pending?
   end
@@ -87,10 +97,22 @@ class Api::V1::AccountsController < Api::BaseController
     raise(ActiveRecord::RecordNotFound) if @account.local? && !@account.user_confirmed?
   end
 
+  def check_accounts_limit
+    raise(Mastodon::ValidationError) if account_ids.size > DEFAULT_ACCOUNTS_LIMIT
+  end
+
   def relationships(**options)
     AccountRelationshipsPresenter.new([@account], current_user.account_id, **options)
   end
 
+  def account_ids
+    Array(accounts_params[:ids]).uniq.map(&:to_i)
+  end
+
+  def accounts_params
+    params.permit(ids: [])
+  end
+
   def account_params
     params.permit(:username, :email, :password, :agreement, :locale, :reason, :time_zone, :invite_code)
   end

app/controllers/api/v1/statuses_controller.rb

@@ -5,9 +5,11 @@ class Api::V1::StatusesController < Api::BaseController
 
   before_action -> { authorize_if_got_token! :read, :'read:statuses' }, except: [:create, :update, :destroy]
   before_action -> { doorkeeper_authorize! :write, :'write:statuses' }, only:   [:create, :update, :destroy]
-  before_action :require_user!, except:  [:show, :context]
-  before_action :set_status, only:       [:show, :context]
-  before_action :set_thread, only:       [:create]
+  before_action :require_user!, except:      [:index, :show, :context]
+  before_action :set_statuses, only:         [:index]
+  before_action :set_status, only:           [:show, :context]
+  before_action :set_thread, only:           [:create]
+  before_action :check_statuses_limit, only: [:index]
 
   override_rate_limit_headers :create, family: :statuses
   override_rate_limit_headers :update, family: :statuses
@@ -23,6 +25,11 @@ class Api::V1::StatusesController < Api::BaseController
   DESCENDANTS_LIMIT       = 60
   DESCENDANTS_DEPTH_LIMIT = 20
 
+  def index
+    @statuses = cache_collection(@statuses, Status)
+    render json: @statuses, each_serializer: REST::StatusSerializer
+  end
+
   def show
     cache_if_unauthenticated!
     @status = cache_collection([@status], Status).first
@@ -111,6 +118,10 @@ class Api::V1::StatusesController < Api::BaseController
 
   private
 
+  def set_statuses
+    @statuses = Status.permitted_statuses_from_ids(status_ids, current_account)
+  end
+
   def set_status
     @status = Status.find(params[:id])
     authorize @status, :show?
@@ -125,6 +136,18 @@ class Api::V1::StatusesController < Api::BaseController
     render json: { error: I18n.t('statuses.errors.in_reply_not_found') }, status: 404
   end
 
+  def check_statuses_limit
+    raise(Mastodon::ValidationError) if status_ids.size > DEFAULT_STATUSES_LIMIT
+  end
+
+  def status_ids
+    Array(statuses_params[:ids]).uniq.map(&:to_i)
+  end
+
+  def statuses_params
+    params.permit(ids: [])
+  end
+
   def status_params
     params.permit(
       :status,

app/models/concerns/status/threading_concern.rb

@@ -3,6 +3,23 @@
 module Status::ThreadingConcern
   extend ActiveSupport::Concern
 
+  class_methods do
+    def permitted_statuses_from_ids(ids, account, stable: false)
+      statuses    = Status.with_accounts(ids).to_a
+      account_ids = statuses.map(&:account_id).uniq
+      domains     = statuses.filter_map(&:account_domain).uniq
+      relations   = account&.relations_map(account_ids, domains) || {}
+
+      statuses.reject! { |status| StatusFilter.new(status, account, relations).filtered? }
+
+      if stable
+        statuses.sort_by! { |status| ids.index(status.id) }
+      else
+        statuses
+      end
+    end
+  end
+
   def ancestors(limit, account = nil)
     find_statuses_from_tree_path(ancestor_ids(limit), account)
   end
@@ -76,15 +93,7 @@ module Status::ThreadingConcern
   end
 
   def find_statuses_from_tree_path(ids, account, promote: false)
-    statuses    = Status.with_accounts(ids).to_a
-    account_ids = statuses.map(&:account_id).uniq
-    domains     = statuses.filter_map(&:account_domain).uniq
-    relations   = account&.relations_map(account_ids, domains) || {}
-
-    statuses.reject! { |status| StatusFilter.new(status, account, relations).filtered? }
-
-    # Order ancestors/descendants by tree path
-    statuses.sort_by! { |status| ids.index(status.id) }
+    statuses = Status.permitted_statuses_from_ids(ids, account, stable: true)
 
     # Bring self-replies to the top
     if promote

config/routes/api.rb

@@ -6,7 +6,7 @@ namespace :api, format: false do
 
   # JSON / REST API
   namespace :v1 do
-    resources :statuses, only: [:create, :show, :update, :destroy] do
+    resources :statuses, only: [:index, :create, :show, :update, :destroy] do
       scope module: :statuses do
         resources :reblogged_by, controller: :reblogged_by_accounts, only: :index
         resources :favourited_by, controller: :favourited_by_accounts, only: :index
@@ -182,7 +182,7 @@ namespace :api, format: false do
       resources :familiar_followers, only: :index
     end
 
-    resources :accounts, only: [:create, :show] do
+    resources :accounts, only: [:index, :create, :show] do
       scope module: :accounts do
         resources :statuses, only: :index
         resources :followers, only: :index, controller: :follower_accounts

spec/requests/api/v1/accounts_spec.rb

@@ -8,6 +8,22 @@ describe '/api/v1/accounts' do
   let(:token)   { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
   let(:headers) { { 'Authorization' => "Bearer #{token.token}" } }
 
+  describe 'GET /api/v1/accounts?ids[]=:id' do
+    let(:account) { Fabricate(:account) }
+    let(:other_account) { Fabricate(:account) }
+    let(:scopes) { 'read:accounts' }
+
+    it 'returns expected response' do
+      get '/api/v1/accounts', headers: headers, params: { ids: [account.id, other_account.id, 123_123] }
+
+      expect(response).to have_http_status(200)
+      expect(body_as_json).to contain_exactly(
+        hash_including(id: account.id.to_s),
+        hash_including(id: other_account.id.to_s)
+      )
+    end
+  end
+
   describe 'GET /api/v1/accounts/:id' do
     context 'when logged out' do
       let(:account) { Fabricate(:account) }

spec/requests/api/v1/statuses_spec.rb

@@ -9,6 +9,22 @@ describe '/api/v1/statuses' do
     let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, application: client_app, scopes: scopes) }
     let(:headers) { { 'Authorization' => "Bearer #{token.token}" } }
 
+    describe 'GET /api/v1/statuses?ids[]=:id' do
+      let(:status) { Fabricate(:status) }
+      let(:other_status) { Fabricate(:status) }
+      let(:scopes) { 'read:statuses' }
+
+      it 'returns expected response' do
+        get '/api/v1/statuses', headers: headers, params: { ids: [status.id, other_status.id, 123_123] }
+
+        expect(response).to have_http_status(200)
+        expect(body_as_json).to contain_exactly(
+          hash_including(id: status.id.to_s),
+          hash_including(id: other_status.id.to_s)
+        )
+      end
+    end
+
     describe 'GET /api/v1/statuses/:id' do
       subject do
         get "/api/v1/statuses/#{status.id}", headers: headers