From 50eb8f1f613df0a2379565f5f5eabd8acc110f15 Mon Sep 17 00:00:00 2001
From: Thibaut Girka <thib@sitedethib.com>
Date: Tue, 10 Apr 2018 22:13:15 +0200
Subject: [PATCH] Add backend support for bookmarks

Bookmarks behave like favourites, except they aren't shared with other
users and do not have an associated counter.
---
 .../api/v1/bookmarks_controller.rb            | 71 +++++++++++++++++++
 .../api/v1/statuses/bookmarks_controller.rb   | 39 ++++++++++
 app/models/account.rb                         |  1 +
 app/models/bookmark.rb                        | 26 +++++++
 app/models/concerns/account_interactions.rb   |  4 ++
 app/models/status.rb                          |  5 ++
 .../status_relationships_presenter.rb         |  2 +
 app/serializers/rest/status_serializer.rb     |  9 +++
 config/routes.rb                              |  4 ++
 db/migrate/20180410220657_create_bookmarks.rb | 14 ++++
 db/schema.rb                                  | 14 +++-
 11 files changed, 188 insertions(+), 1 deletion(-)
 create mode 100644 app/controllers/api/v1/bookmarks_controller.rb
 create mode 100644 app/controllers/api/v1/statuses/bookmarks_controller.rb
 create mode 100644 app/models/bookmark.rb
 create mode 100644 db/migrate/20180410220657_create_bookmarks.rb

diff --git a/app/controllers/api/v1/bookmarks_controller.rb b/app/controllers/api/v1/bookmarks_controller.rb
new file mode 100644
index 000000000..49038807d
--- /dev/null
+++ b/app/controllers/api/v1/bookmarks_controller.rb
@@ -0,0 +1,71 @@
+# frozen_string_literal: true
+
+class Api::V1::BookmarksController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read }
+  before_action :require_user!
+  after_action :insert_pagination_headers
+
+  respond_to :json
+
+  def index
+    @statuses = load_statuses
+    render json: @statuses, each_serializer: REST::StatusSerializer, relationships: StatusRelationshipsPresenter.new(@statuses, current_user&.account_id)
+  end
+
+  private
+
+  def load_statuses
+    cached_bookmarks
+  end
+
+  def cached_bookmarks
+    cache_collection(
+      Status.reorder(nil).joins(:bookmarks).merge(results),
+      Status
+    )
+  end
+
+  def results
+    @_results ||= account_bookmarks.paginate_by_max_id(
+      limit_param(DEFAULT_STATUSES_LIMIT),
+      params[:max_id],
+      params[:since_id]
+    )
+  end
+
+  def account_bookmarks
+    current_account.bookmarks
+  end
+
+  def insert_pagination_headers
+    set_pagination_headers(next_path, prev_path)
+  end
+
+  def next_path
+    if records_continue?
+      api_v1_bookmarks_url pagination_params(max_id: pagination_max_id)
+    end
+  end
+
+  def prev_path
+    unless results.empty?
+      api_v1_bookmarks_url pagination_params(since_id: pagination_since_id)
+    end
+  end
+
+  def pagination_max_id
+    results.last.id
+  end
+
+  def pagination_since_id
+    results.first.id
+  end
+
+  def records_continue?
+    results.size == limit_param(DEFAULT_STATUSES_LIMIT)
+  end
+
+  def pagination_params(core_params)
+    params.slice(:limit).permit(:limit).merge(core_params)
+  end
+end
diff --git a/app/controllers/api/v1/statuses/bookmarks_controller.rb b/app/controllers/api/v1/statuses/bookmarks_controller.rb
new file mode 100644
index 000000000..d7def5f1f
--- /dev/null
+++ b/app/controllers/api/v1/statuses/bookmarks_controller.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+class Api::V1::Statuses::BookmarksController < Api::BaseController
+  include Authorization
+
+  before_action -> { doorkeeper_authorize! :write }
+  before_action :require_user!
+
+  respond_to :json
+
+  def create
+    @status = bookmarked_status
+    render json: @status, serializer: REST::StatusSerializer
+  end
+
+  def destroy
+    @status = requested_status
+    @bookmarks_map = { @status.id => false }
+
+    bookmark = Bookmark.find_by!(account: current_user.account, status: @status)
+    bookmark.destroy!
+
+    render json: @status, serializer: REST::StatusSerializer, relationships: StatusRelationshipsPresenter.new([@status], current_user&.account_id, bookmarks_map: @bookmarks_map)
+  end
+
+  private
+
+  def bookmarked_status
+    authorize_with current_user.account, requested_status, :show?
+
+    bookmark = Bookmark.find_or_create_by!(account: current_user.account, status: requested_status)
+
+    bookmark.status.reload
+  end
+
+  def requested_status
+    Status.find(params[:status_id])
+  end
+end
diff --git a/app/models/account.rb b/app/models/account.rb
index 31f3d5253..1be2f2da6 100644
--- a/app/models/account.rb
+++ b/app/models/account.rb
@@ -80,6 +80,7 @@ class Account < ApplicationRecord
   has_many :stream_entries, inverse_of: :account, dependent: :destroy
   has_many :statuses, inverse_of: :account, dependent: :destroy
   has_many :favourites, inverse_of: :account, dependent: :destroy
+  has_many :bookmarks, inverse_of: :account, dependent: :destroy
   has_many :mentions, inverse_of: :account, dependent: :destroy
   has_many :notifications, inverse_of: :account, dependent: :destroy
 
diff --git a/app/models/bookmark.rb b/app/models/bookmark.rb
new file mode 100644
index 000000000..01dc48ee7
--- /dev/null
+++ b/app/models/bookmark.rb
@@ -0,0 +1,26 @@
+# frozen_string_literal: true
+# == Schema Information
+#
+# Table name: bookmarks
+#
+#  id         :integer          not null, primary key
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#  account_id :integer          not null
+#  status_id  :integer          not null
+#
+
+class Bookmark < ApplicationRecord
+  include Paginable
+
+  update_index('statuses#status', :status) if Chewy.enabled?
+
+  belongs_to :account, inverse_of: :bookmarks
+  belongs_to :status,  inverse_of: :bookmarks
+
+  validates :status_id, uniqueness: { scope: :account_id }
+
+  before_validation do
+    self.status = status.reblog if status&.reblog?
+  end
+end
diff --git a/app/models/concerns/account_interactions.rb b/app/models/concerns/account_interactions.rb
index fdf35a4e3..3830ba9b0 100644
--- a/app/models/concerns/account_interactions.rb
+++ b/app/models/concerns/account_interactions.rb
@@ -164,6 +164,10 @@ module AccountInteractions
     status.proper.favourites.where(account: self).exists?
   end
 
+  def bookmarked?(status)
+    status.proper.bookmarks.where(account: self).exists?
+  end
+
   def reblogged?(status)
     status.proper.reblogs.where(account: self).exists?
   end
diff --git a/app/models/status.rb b/app/models/status.rb
index 7e5ca09e4..34b41d347 100644
--- a/app/models/status.rb
+++ b/app/models/status.rb
@@ -46,6 +46,7 @@ class Status < ApplicationRecord
   belongs_to :reblog, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblogs, counter_cache: :reblogs_count, optional: true
 
   has_many :favourites, inverse_of: :status, dependent: :destroy
+  has_many :bookmarks, inverse_of: :status, dependent: :destroy
   has_many :reblogs, foreign_key: 'reblog_of_id', class_name: 'Status', inverse_of: :reblog, dependent: :destroy
   has_many :replies, foreign_key: 'in_reply_to_id', class_name: 'Status', inverse_of: :thread
   has_many :mentions, dependent: :destroy
@@ -216,6 +217,10 @@ class Status < ApplicationRecord
       Favourite.select('status_id').where(status_id: status_ids).where(account_id: account_id).map { |f| [f.status_id, true] }.to_h
     end
 
+    def bookmarks_map(status_ids, account_id)
+      Bookmark.select('status_id').where(status_id: status_ids).where(account_id: account_id).map { |f| [f.status_id, true] }.to_h
+    end
+
     def reblogs_map(status_ids, account_id)
       select('reblog_of_id').where(reblog_of_id: status_ids).where(account_id: account_id).reorder(nil).map { |s| [s.reblog_of_id, true] }.to_h
     end
diff --git a/app/presenters/status_relationships_presenter.rb b/app/presenters/status_relationships_presenter.rb
index b04e10e2f..64e688d87 100644
--- a/app/presenters/status_relationships_presenter.rb
+++ b/app/presenters/status_relationships_presenter.rb
@@ -7,6 +7,7 @@ class StatusRelationshipsPresenter
     if current_account_id.nil?
       @reblogs_map    = {}
       @favourites_map = {}
+      @bookmarks_map  = {}
       @mutes_map      = {}
       @pins_map       = {}
     else
@@ -17,6 +18,7 @@ class StatusRelationshipsPresenter
 
       @reblogs_map     = Status.reblogs_map(status_ids, current_account_id).merge(options[:reblogs_map] || {})
       @favourites_map  = Status.favourites_map(status_ids, current_account_id).merge(options[:favourites_map] || {})
+      @bookmarks_map   = Status.bookmarks_map(status_ids, current_account_id).merge(options[:bookmarks_map] || {})
       @mutes_map       = Status.mutes_map(conversation_ids, current_account_id).merge(options[:mutes_map] || {})
       @pins_map        = Status.pins_map(pinnable_status_ids, current_account_id).merge(options[:pins_map] || {})
     end
diff --git a/app/serializers/rest/status_serializer.rb b/app/serializers/rest/status_serializer.rb
index fe3dc9bfc..c8fffcf68 100644
--- a/app/serializers/rest/status_serializer.rb
+++ b/app/serializers/rest/status_serializer.rb
@@ -8,6 +8,7 @@ class REST::StatusSerializer < ActiveModel::Serializer
   attribute :favourited, if: :current_user?
   attribute :reblogged, if: :current_user?
   attribute :muted, if: :current_user?
+  attribute :bookmarked, if: :current_user?
   attribute :pinned, if: :pinnable?
 
   belongs_to :reblog, serializer: REST::StatusSerializer
@@ -71,6 +72,14 @@ class REST::StatusSerializer < ActiveModel::Serializer
     end
   end
 
+  def bookmarked
+    if instance_options && instance_options[:bookmarks]
+      instance_options[:bookmarks].bookmarks_map[object.id] || false
+    else
+      current_user.account.bookmarked?(object)
+    end
+  end
+
   def pinned
     if instance_options && instance_options[:relationships]
       instance_options[:relationships].pins_map[object.id] || false
diff --git a/config/routes.rb b/config/routes.rb
index 092a14f47..9d4aa00ed 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -224,6 +224,9 @@ Rails.application.routes.draw do
           resource :favourite, only: :create
           post :unfavourite, to: 'favourites#destroy'
 
+          resource :bookmark, only: :create
+          post :unbookmark, to: 'bookmarks#destroy'
+
           resource :mute, only: :create
           post :unmute, to: 'mutes#destroy'
 
@@ -259,6 +262,7 @@ Rails.application.routes.draw do
         end
       end
       resources :favourites, only: [:index]
+      resources :bookmarks,  only: [:index]
       resources :reports,    only: [:index, :create]
 
       namespace :apps do
diff --git a/db/migrate/20180410220657_create_bookmarks.rb b/db/migrate/20180410220657_create_bookmarks.rb
new file mode 100644
index 000000000..208da452b
--- /dev/null
+++ b/db/migrate/20180410220657_create_bookmarks.rb
@@ -0,0 +1,14 @@
+class CreateBookmarks < ActiveRecord::Migration[5.1]
+  def change
+    create_table :bookmarks do |t|
+      t.references :account, null: false
+      t.references :status, null: false
+
+      t.timestamps
+    end
+
+    add_foreign_key :bookmarks, :accounts, column: :account_id, on_delete: :cascade
+    add_foreign_key :bookmarks, :statuses, column: :status_id, on_delete: :cascade
+    add_index :bookmarks, [:account_id, :status_id], unique: true
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index e7eadbf41..2cf6db773 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20180402040909) do
+ActiveRecord::Schema.define(version: 20180410220657) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -113,6 +113,16 @@ ActiveRecord::Schema.define(version: 20180402040909) do
     t.index ["account_id", "target_account_id"], name: "index_blocks_on_account_id_and_target_account_id", unique: true
   end
 
+  create_table "bookmarks", force: :cascade do |t|
+    t.bigint "account_id", null: false
+    t.bigint "status_id", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["account_id", "status_id"], name: "index_bookmarks_on_account_id_and_status_id", unique: true
+    t.index ["account_id"], name: "index_bookmarks_on_account_id"
+    t.index ["status_id"], name: "index_bookmarks_on_status_id"
+  end
+
   create_table "conversation_mutes", force: :cascade do |t|
     t.bigint "conversation_id", null: false
     t.bigint "account_id", null: false
@@ -562,6 +572,8 @@ ActiveRecord::Schema.define(version: 20180402040909) do
   add_foreign_key "backups", "users", on_delete: :nullify
   add_foreign_key "blocks", "accounts", column: "target_account_id", name: "fk_9571bfabc1", on_delete: :cascade
   add_foreign_key "blocks", "accounts", name: "fk_4269e03e65", on_delete: :cascade
+  add_foreign_key "bookmarks", "accounts", on_delete: :cascade
+  add_foreign_key "bookmarks", "statuses", on_delete: :cascade
   add_foreign_key "conversation_mutes", "accounts", name: "fk_225b4212bb", on_delete: :cascade
   add_foreign_key "conversation_mutes", "conversations", on_delete: :cascade
   add_foreign_key "favourites", "accounts", name: "fk_5eb6c2b873", on_delete: :cascade