From b13e7dda1f33be43d1667b754b67df71f3187a5c Mon Sep 17 00:00:00 2001 From: Eugen Rochko Date: Wed, 9 Nov 2016 17:48:44 +0100 Subject: [PATCH] API pagination for all collections using Link header --- app/controllers/api/v1/accounts_controller.rb | 28 +++++++++-- app/controllers/api/v1/follows_controller.rb | 2 +- app/controllers/api/v1/media_controller.rb | 2 +- app/controllers/api/v1/statuses_controller.rb | 18 ++++++- .../api/v1/timelines_controller.rb | 42 ++++++++++++---- app/controllers/api_controller.rb | 10 ++++ app/models/account.rb | 50 ++++++++++--------- app/models/concerns/paginable.rb | 6 +-- app/models/favourite.rb | 1 + app/models/feed.rb | 6 ++- app/models/follow.rb | 1 + app/models/status.rb | 8 --- config/routes.rb | 12 ++--- 13 files changed, 123 insertions(+), 63 deletions(-) diff --git a/app/controllers/api/v1/accounts_controller.rb b/app/controllers/api/v1/accounts_controller.rb index 4140439a8..f2049cd55 100644 --- a/app/controllers/api/v1/accounts_controller.rb +++ b/app/controllers/api/v1/accounts_controller.rb @@ -4,7 +4,7 @@ class Api::V1::AccountsController < ApiController before_action :require_user!, except: [:show, :following, :followers, :statuses] before_action :set_account, except: [:verify_credentials, :suggestions] - respond_to :json + respond_to :json def show end @@ -15,12 +15,26 @@ class Api::V1::AccountsController < ApiController end def following - @accounts = @account.following.with_counters.limit(40) + results = Follow.where(account: @account).paginate_by_max_id(DEFAULT_ACCOUNTS_LIMIT, params[:max_id], params[:since_id]) + @accounts = Account.where(id: results.map(&:account_id)).with_counters.to_a + + next_path = following_api_v1_account_url(max_id: results.last.id) if results.size == DEFAULT_ACCOUNTS_LIMIT + prev_path = following_api_v1_account_url(since_id: results.first.id) if results.size > 0 + + set_pagination_headers(next_path, prev_path) + render action: :index end def followers - @accounts = @account.followers.with_counters.limit(40) + results = Follow.where(target_account: @account).paginate_by_max_id(DEFAULT_ACCOUNTS_LIMIT, params[:max_id], params[:since_id]) + @accounts = Account.where(id: results.map(&:account_id)).with_counters.to_a + + next_path = following_api_v1_account_url(max_id: results.last.id) if results.size == DEFAULT_ACCOUNTS_LIMIT + prev_path = following_api_v1_account_url(since_id: results.first.id) if results.size > 0 + + set_pagination_headers(next_path, prev_path) + render action: :index end @@ -35,8 +49,14 @@ class Api::V1::AccountsController < ApiController end def statuses - @statuses = @account.statuses.with_includes.with_counters.paginate_by_max_id(20, params[:max_id], params[:since_id]).to_a + @statuses = @account.statuses.with_includes.with_counters.paginate_by_max_id(DEFAULT_STATUSES_LIMIT, params[:max_id], params[:since_id]).to_a + set_maps(@statuses) + + next_path = statuses_api_v1_account_url(max_id: @statuses.last.id) if @statuses.size == DEFAULT_STATUSES_LIMIT + prev_path = statuses_api_v1_account_url(since_id: @statuses.first.id) if @statuses.size > 0 + + set_pagination_headers(next_path, prev_path) end def follow diff --git a/app/controllers/api/v1/follows_controller.rb b/app/controllers/api/v1/follows_controller.rb index 80a5aedf2..6a77c4d66 100644 --- a/app/controllers/api/v1/follows_controller.rb +++ b/app/controllers/api/v1/follows_controller.rb @@ -2,7 +2,7 @@ class Api::V1::FollowsController < ApiController before_action -> { doorkeeper_authorize! :follow } before_action :require_user! - respond_to :json + respond_to :json def create raise ActiveRecord::RecordNotFound if params[:uri].blank? diff --git a/app/controllers/api/v1/media_controller.rb b/app/controllers/api/v1/media_controller.rb index ab216f9c9..6b93e47b4 100644 --- a/app/controllers/api/v1/media_controller.rb +++ b/app/controllers/api/v1/media_controller.rb @@ -2,7 +2,7 @@ class Api::V1::MediaController < ApiController before_action -> { doorkeeper_authorize! :write } before_action :require_user! - respond_to :json + respond_to :json def create @media = MediaAttachment.create!(account: current_user.account, file: params[:file]) diff --git a/app/controllers/api/v1/statuses_controller.rb b/app/controllers/api/v1/statuses_controller.rb index 51a044a6c..3c86cae00 100644 --- a/app/controllers/api/v1/statuses_controller.rb +++ b/app/controllers/api/v1/statuses_controller.rb @@ -15,12 +15,26 @@ class Api::V1::StatusesController < ApiController end def reblogged_by - @accounts = @status.reblogged_by(40) + results = @status.reblogs.paginate_by_max_id(DEFAULT_ACCOUNTS_LIMIT, params[:max_id], params[:since_id]) + @accounts = Account.where(id: results.map(&:account_id)).with_counters.to_a + + next_path = reblogged_by_api_v1_status_url(max_id: results.last.id) if results.size == DEFAULT_ACCOUNTS_LIMIT + prev_path = reblogged_by_api_v1_status_url(since_id: results.first.id) if results.size > 0 + + set_pagination_headers(next_path, prev_path) + render action: :accounts end def favourited_by - @accounts = @status.favourited_by(40) + results = @status.favourites.paginate_by_max_id(DEFAULT_ACCOUNTS_LIMIT, params[:max_id], params[:since_id]) + @accounts = Account.where(id: results.map(&:account_id)).with_counters.to_a + + next_path = favourited_by_api_v1_status_url(max_id: results.last.id) if results.size == DEFAULT_ACCOUNTS_LIMIT + prev_path = favourited_by_api_v1_status_url(since_id: results.first.id) if results.size > 0 + + set_pagination_headers(next_path, prev_path) + render action: :accounts end diff --git a/app/controllers/api/v1/timelines_controller.rb b/app/controllers/api/v1/timelines_controller.rb index e5176dd4b..6d7858c76 100644 --- a/app/controllers/api/v1/timelines_controller.rb +++ b/app/controllers/api/v1/timelines_controller.rb @@ -5,32 +5,54 @@ class Api::V1::TimelinesController < ApiController respond_to :json def home - @statuses = Feed.new(:home, current_account).get(20, params[:max_id], params[:since_id]).to_a + @statuses = Feed.new(:home, current_account).get(DEFAULT_STATUSES_LIMIT, params[:max_id], params[:since_id]).to_a + set_maps(@statuses) + + next_path = api_v1_home_timeline_url(max_id: @statuses.last.id) if @statuses.size == DEFAULT_STATUSES_LIMIT + prev_path = api_v1_home_timeline_url(since_id: @statuses.first.id) if @statuses.size > 0 + + set_pagination_headers(next_path, prev_path) + render action: :index end def mentions - @statuses = Feed.new(:mentions, current_account).get(20, params[:max_id], params[:since_id]).to_a + @statuses = Feed.new(:mentions, current_account).get(DEFAULT_STATUSES_LIMIT, params[:max_id], params[:since_id]).to_a + set_maps(@statuses) + + next_path = api_v1_mentions_timeline_url(max_id: @statuses.last.id) if @statuses.size == DEFAULT_STATUSES_LIMIT + prev_path = api_v1_mentions_timeline_url(since_id: @statuses.first.id) if @statuses.size > 0 + + set_pagination_headers(next_path, prev_path) + render action: :index end def public - @statuses = Status.as_public_timeline(current_account).paginate_by_max_id(20, params[:max_id], params[:since_id]).to_a + @statuses = Status.as_public_timeline(current_account).paginate_by_max_id(DEFAULT_STATUSES_LIMIT, params[:max_id], params[:since_id]).to_a + set_maps(@statuses) + + next_path = api_v1_public_timeline_url(max_id: @statuses.last.id) if @statuses.size == DEFAULT_STATUSES_LIMIT + prev_path = api_v1_public_timeline_url(since_id: @statuses.first.id) if @statuses.size > 0 + + set_pagination_headers(next_path, prev_path) + render action: :index end def tag - @tag = Tag.find_by(name: params[:id].downcase) + @tag = Tag.find_by(name: params[:id].downcase) + @statuses = @tag.nil? ? [] : Status.as_tag_timeline(@tag, current_account).paginate_by_max_id(DEFAULT_STATUSES_LIMIT, params[:max_id], params[:since_id]).to_a - if @tag.nil? - @statuses = [] - else - @statuses = Status.as_tag_timeline(@tag, current_account).paginate_by_max_id(20, params[:max_id], params[:since_id]).to_a - set_maps(@statuses) - end + set_maps(@statuses) + + next_path = api_v1_hashtag_timeline_url(params[:id], max_id: @statuses.last.id) if @statuses.size == DEFAULT_STATUSES_LIMIT + prev_path = api_v1_hashtag_timeline_url(params[:id], since_id: @statuses.first.id) if @statuses.size > 0 + + set_pagination_headers(next_path, prev_path) render action: :index end diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb index db4035a96..5243f7d7b 100644 --- a/app/controllers/api_controller.rb +++ b/app/controllers/api_controller.rb @@ -1,4 +1,7 @@ class ApiController < ApplicationController + DEFAULT_STATUSES_LIMIT = 20 + DEFAULT_ACCOUNTS_LIMIT = 40 + protect_from_forgery with: :null_session skip_before_action :verify_authenticity_token @@ -54,6 +57,13 @@ class ApiController < ApplicationController response.headers['Access-Control-Allow-Headers'] = 'Origin, X-Requested-With, Content-Type, Accept, Authorization' end + def set_pagination_headers(next_path = nil, prev_path = nil) + links = [] + links << [next_path, [['rel', 'next']]] if next_path + links << [prev_path, [['rel', 'prev']]] if prev_path + response.headers['Link'] = LinkHeader.new(links) + end + def current_resource_owner User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token end diff --git a/app/models/account.rb b/app/models/account.rb index 92286369e..4fb0baebe 100644 --- a/app/models/account.rb +++ b/app/models/account.rb @@ -133,36 +133,38 @@ class Account < ApplicationRecord [] end - def self.find_local!(username) - find_remote!(username, nil) - end + class << self + def find_local!(username) + find_remote!(username, nil) + end - def self.find_remote!(username, domain) - where(arel_table[:username].matches(username)).where(domain.nil? ? { domain: nil } : arel_table[:domain].matches(domain)).take! - end + def find_remote!(username, domain) + where(arel_table[:username].matches(username)).where(domain.nil? ? { domain: nil } : arel_table[:domain].matches(domain)).take! + end - def self.find_local(username) - find_local!(username) - rescue ActiveRecord::RecordNotFound - nil - end + def find_local(username) + find_local!(username) + rescue ActiveRecord::RecordNotFound + nil + end - def self.find_remote(username, domain) - find_remote!(username, domain) - rescue ActiveRecord::RecordNotFound - nil - end + def find_remote(username, domain) + find_remote!(username, domain) + rescue ActiveRecord::RecordNotFound + nil + end - def self.following_map(target_account_ids, account_id) - Follow.where(target_account_id: target_account_ids).where(account_id: account_id).map { |f| [f.target_account_id, true] }.to_h - end + def following_map(target_account_ids, account_id) + Follow.where(target_account_id: target_account_ids).where(account_id: account_id).map { |f| [f.target_account_id, true] }.to_h + end - def self.followed_by_map(target_account_ids, account_id) - Follow.where(account_id: target_account_ids).where(target_account_id: account_id).map { |f| [f.account_id, true] }.to_h - end + def followed_by_map(target_account_ids, account_id) + Follow.where(account_id: target_account_ids).where(target_account_id: account_id).map { |f| [f.account_id, true] }.to_h + end - def self.blocking_map(target_account_ids, account_id) - Block.where(target_account_id: target_account_ids).where(account_id: account_id).map { |b| [b.target_account_id, true] }.to_h + def blocking_map(target_account_ids, account_id) + Block.where(target_account_id: target_account_ids).where(account_id: account_id).map { |b| [b.target_account_id, true] }.to_h + end end before_create do diff --git a/app/models/concerns/paginable.rb b/app/models/concerns/paginable.rb index 0a542d534..08f207621 100644 --- a/app/models/concerns/paginable.rb +++ b/app/models/concerns/paginable.rb @@ -2,11 +2,11 @@ module Paginable extend ActiveSupport::Concern included do - def self.paginate_by_max_id(limit, max_id = nil, since_id = nil) - query = order('id desc').limit(limit) + scope :paginate_by_max_id, -> (limit, max_id = nil, since_id = nil) { + query = order(arel_table[:id].desc).limit(limit) query = query.where(arel_table[:id].lt(max_id)) unless max_id.blank? query = query.where(arel_table[:id].gt(since_id)) unless since_id.blank? query - end + } end end diff --git a/app/models/favourite.rb b/app/models/favourite.rb index 8b8082f1e..60d853ce2 100644 --- a/app/models/favourite.rb +++ b/app/models/favourite.rb @@ -1,4 +1,5 @@ class Favourite < ApplicationRecord + include Paginable include Streamable belongs_to :account, inverse_of: :favourites diff --git a/app/models/feed.rb b/app/models/feed.rb index e7a39f5da..408403873 100644 --- a/app/models/feed.rb +++ b/app/models/feed.rb @@ -12,11 +12,13 @@ class Feed # If we're after most recent items and none are there, we need to precompute the feed if unhydrated.empty? && max_id == '+inf' && since_id == '-inf' RegenerationWorker.perform_async(@account.id, @type) - Status.send("as_#{@type}_timeline", @account).paginate_by_max_id(limit, nil, nil) + @statuses = Status.send("as_#{@type}_timeline", @account).paginate_by_max_id(limit, nil, nil) else status_map = Status.where(id: unhydrated).with_includes.with_counters.map { |status| [status.id, status] }.to_h - unhydrated.map { |id| status_map[id] }.compact + @statuses = unhydrated.map { |id| status_map[id] }.compact end + + @statuses end private diff --git a/app/models/follow.rb b/app/models/follow.rb index 656b28d35..720812b6d 100644 --- a/app/models/follow.rb +++ b/app/models/follow.rb @@ -1,4 +1,5 @@ class Follow < ApplicationRecord + include Paginable include Streamable belongs_to :account diff --git a/app/models/status.rb b/app/models/status.rb index 07aef26ee..9db7a0a3a 100644 --- a/app/models/status.rb +++ b/app/models/status.rb @@ -78,14 +78,6 @@ class Status < ApplicationRecord ids.map { |id| statuses[id].first } end - def reblogged_by(limit) - Account.where(id: reblogs.limit(limit).pluck(:account_id)).with_counters - end - - def favourited_by(limit) - Account.where(id: favourites.limit(limit).pluck(:account_id)).with_counters - end - class << self def as_home_timeline(account) where(account: [account] + account.following).with_includes.with_counters diff --git a/config/routes.rb b/config/routes.rb index 26b61b8e1..5916ffa42 100644 --- a/config/routes.rb +++ b/config/routes.rb @@ -67,14 +67,10 @@ Rails.application.routes.draw do end end - resources :timelines, only: [] do - collection do - get :home - get :mentions - get :public - get '/tag/:id', action: :tag - end - end + get '/timelines/home', to: 'timelines#home', as: :home_timeline + get '/timelines/mentions', to: 'timelines#mentions', as: :mentions_timeline + get '/timelines/public', to: 'timelines#public', as: :public_timeline + get '/timelines/tag/:id', to: 'timelines#tag', as: :hashtag_timeline resources :follows, only: [:create] resources :media, only: [:create]