From 7072612d9087bf3ab7fd0d1a2f93c126e2159eb0 Mon Sep 17 00:00:00 2001
From: p31729568 <winse.wang@foxmail.com>
Date: Tue, 23 Jul 2019 15:38:32 +0800
Subject: [PATCH] library feature api

---
 app/controllers/libraries_controller.rb       | 87 +++++++++++++++++++
 app/decorators/library_decorator.rb           |  5 ++
 app/forms/libraries/save_form.rb              | 12 +++
 app/libs/util/uuid.rb                         |  9 ++
 app/models/library.rb                         | 43 +++++++++
 app/models/library_apply.rb                   | 19 ++++
 app/models/library_library_tag.rb             |  4 +
 app/models/library_tag.rb                     |  6 ++
 app/services/libraries/agree_apply_service.rb | 32 +++++++
 .../libraries/refuse_apply_service.rb         | 39 +++++++++
 app/services/libraries/save_service.rb        | 69 +++++++++++++++
 app/services/libraries/submit_service.rb      | 32 +++++++
 app/views/libraries/index.json.jbuilder       | 16 ++++
 app/views/libraries/show.json.jbuilder        | 46 ++++++++++
 .../locales/forms/save_library_form.zh-CN.yml | 12 +++
 config/routes.rb                              |  2 +
 16 files changed, 433 insertions(+)
 create mode 100644 app/controllers/libraries_controller.rb
 create mode 100644 app/decorators/library_decorator.rb
 create mode 100644 app/forms/libraries/save_form.rb
 create mode 100644 app/libs/util/uuid.rb
 create mode 100644 app/models/library.rb
 create mode 100644 app/models/library_apply.rb
 create mode 100644 app/models/library_library_tag.rb
 create mode 100644 app/models/library_tag.rb
 create mode 100644 app/services/libraries/agree_apply_service.rb
 create mode 100644 app/services/libraries/refuse_apply_service.rb
 create mode 100644 app/services/libraries/save_service.rb
 create mode 100644 app/services/libraries/submit_service.rb
 create mode 100644 app/views/libraries/index.json.jbuilder
 create mode 100644 app/views/libraries/show.json.jbuilder
 create mode 100644 config/locales/forms/save_library_form.zh-CN.yml

diff --git a/app/controllers/libraries_controller.rb b/app/controllers/libraries_controller.rb
new file mode 100644
index 000000000..55894aaa6
--- /dev/null
+++ b/app/controllers/libraries_controller.rb
@@ -0,0 +1,87 @@
+class LibrariesController < ApplicationController
+  include PaginateHelper
+
+  before_action :require_login, :check_auth, except: %i[index show]
+
+  helper_method :current_library, :library_manageable?
+
+  def index
+    libraries = Library.all
+
+    libraries =
+      if User.current&.logged? && params[:type] == 'mine'
+        libraries.where(user_id: current_user.id).order(created_at: :desc)
+      else
+        libraries.where(status: :published).order(visited_count: :desc)
+      end
+
+    keyword = params[:keyword].to_s.strip
+    if keyword.present?
+      libraries = libraries.where('title LIKE :keyword OR author_name LIKE :keyword OR author_school_name LIKE :keyword',
+                                  keyword: "%#{keyword}%")
+    end
+
+    @count = libraries.count
+    @libraries = paginate libraries.includes(:library_tags, :praise_tread_cache, user: :user_extension)
+
+    ids = @libraries.map(&:id)
+    @download_count_map = Attachment.where(container_type: 'Library', container_id: ids)
+                            .group(:container_id).sum(:downloads)
+  end
+
+  def show
+    unless current_library.published? || library_manageable?(current_library)
+      return render_forbidden
+    end
+  end
+
+  def create
+    library = current_user.libraries.new
+    Libraries::SaveService.call(library, current_user, save_params)
+    render_ok
+  rescue Libraries::SaveService::Error => ex
+    render_error(ex.message)
+  end
+
+  def update
+    return render_forbidden unless library_manageable?(current_library)
+
+    Libraries::SaveService.call(current_library, current_user, save_params)
+    render_ok
+  rescue Libraries::SaveService::Error => ex
+    render_error(ex.message)
+  end
+
+  def destroy
+    if admin_or_business?
+      current_library.destroy!
+    elsif current_library.user_id == current_user&.id
+      unless current_library.pending?
+        render_error('只有草稿才能删除')
+        return
+      end
+
+      current_library.destroy!
+    else
+      render_forbidden
+      return
+    end
+
+    render_ok
+  end
+
+  private
+
+  def current_library
+    @_current_library ||= Library.find(params[:id])
+  end
+
+  def library_manageable?(library)
+    current_user&.id == library.user_id || admin_or_business?
+  end
+
+  def save_params
+    params.permit(:title, :content, :author_name, :author_school_name,
+                  :cover_id, :publish, attachment_ids: [], tag_ids: [])
+  end
+end
\ No newline at end of file
diff --git a/app/decorators/library_decorator.rb b/app/decorators/library_decorator.rb
new file mode 100644
index 000000000..2768ad036
--- /dev/null
+++ b/app/decorators/library_decorator.rb
@@ -0,0 +1,5 @@
+module LibraryDecorator
+  extend ApplicationDecorator
+
+  display_time_method :published_at, :created_at, :updated_at
+end
\ No newline at end of file
diff --git a/app/forms/libraries/save_form.rb b/app/forms/libraries/save_form.rb
new file mode 100644
index 000000000..89e00cb20
--- /dev/null
+++ b/app/forms/libraries/save_form.rb
@@ -0,0 +1,12 @@
+class Libraries::SaveForm
+  include ActiveModel::Model
+
+  attr_accessor :title, :content, :author_name, :author_school_name, :cover_id,
+                :publish, :attachment_ids, :tag_ids
+
+  validates :title, presence: true, length: { maximum: 255 }
+  validates :content, presence: true
+  validates :author_name, presence: true, length: { maximum: 10 }
+  validates :author_school_name, presence: true, length: { maximum: 50 }
+  validates :attachment_ids, presence: true
+end
\ No newline at end of file
diff --git a/app/libs/util/uuid.rb b/app/libs/util/uuid.rb
new file mode 100644
index 000000000..2f6757139
--- /dev/null
+++ b/app/libs/util/uuid.rb
@@ -0,0 +1,9 @@
+module Util
+  module UUID
+    module_function
+
+    def time_uuid(format: '%Y%m%d%H%M%S', suffix: 8)
+      "#{Time.zone.now.strftime(format)}#{Random.rand(10**suffix).to_i}"
+    end
+  end
+end
diff --git a/app/models/library.rb b/app/models/library.rb
new file mode 100644
index 000000000..894dcdac0
--- /dev/null
+++ b/app/models/library.rb
@@ -0,0 +1,43 @@
+class Library < ApplicationRecord
+  include AASM
+
+  belongs_to :user
+  belongs_to :cover, class_name: 'Attachment', foreign_key: :cover_id, optional: true
+
+  has_many :library_applies, dependent: :delete_all
+  has_many :library_library_tags, dependent: :delete_all
+  has_many :library_tags, through: :library_library_tags
+
+  has_many :attachments, as: :container
+  has_one :praise_tread_cache, foreign_key: :object_id
+
+  validates :uuid, presence: true, uniqueness: true
+
+  aasm(:status) do
+    state :pending, initiali: true
+    state :processing
+    state :refused
+    state :published
+
+    event :submit do
+      transitions from: [:pending, :refused], to: :processing
+    end
+
+    event :refuse do
+      transitions from: :processing, to: :refused
+    end
+
+    event :publish do
+      transitions from: :processing, to: :published
+    end
+  end
+
+  def generate_uuid
+    uuid = Util::UUID.time_uuid
+    while Library.exists?(uuid: uuid)
+      uuid = Util::UUID.time_uuid
+    end
+
+    self.uuid = uuid
+  end
+end
\ No newline at end of file
diff --git a/app/models/library_apply.rb b/app/models/library_apply.rb
new file mode 100644
index 000000000..13e195f34
--- /dev/null
+++ b/app/models/library_apply.rb
@@ -0,0 +1,19 @@
+class LibraryApply < ApplicationRecord
+  include AASM
+
+  belongs_to :library
+
+  aasm(:status) do
+    state :pending, initiali: true
+    state :refused
+    state :agreed
+
+    event :refuse do
+      transitions from: :pending, to: :refused
+    end
+
+    event :agree do
+      transitions from: :pending, to: :agreed
+    end
+  end
+end
\ No newline at end of file
diff --git a/app/models/library_library_tag.rb b/app/models/library_library_tag.rb
new file mode 100644
index 000000000..9527289b0
--- /dev/null
+++ b/app/models/library_library_tag.rb
@@ -0,0 +1,4 @@
+class LibraryLibraryTag < ApplicationRecord
+  belongs_to :library
+  belongs_to :library_tag
+end
diff --git a/app/models/library_tag.rb b/app/models/library_tag.rb
new file mode 100644
index 000000000..79ff4672f
--- /dev/null
+++ b/app/models/library_tag.rb
@@ -0,0 +1,6 @@
+class LibraryTag < ApplicationRecord
+  has_many :library_library_tags, dependent: :delete_all
+  has_many :libraries, through: :library_library_tags
+
+  validates :name, presence: true, uniqueness: true
+end
diff --git a/app/services/libraries/agree_apply_service.rb b/app/services/libraries/agree_apply_service.rb
new file mode 100644
index 000000000..d452083b3
--- /dev/null
+++ b/app/services/libraries/agree_apply_service.rb
@@ -0,0 +1,32 @@
+class Libraries::AgreeApplyService < ApplicationService
+  Error = Class.new(StandardError)
+
+  attr_reader :library_apply, :library, :user
+
+  def initialize(library_apply, user)
+    @library_apply = library_apply
+    @library       = library_apply.library
+    @user          = user
+  end
+
+  def call
+    raise Error, '该状态下不能进行此操作' unless library_apply.may_agree?
+
+    ActiveRecord::Base.transaction do
+      library_apply.agree!
+      library_apply.library.publish!
+
+      # 将消息改为已处理
+      Tiding.where(container_id: library.id, container_type: 'Library', tiding_type: 'Apply', status: 0).update_all(status: 1)
+      notify_library_author!
+    end
+  end
+
+  private
+
+  def notify_library_author!
+    Tiding.create!(user_id: library.user_id, trigger_user_id: 1,
+                   container_id: library.id, container_type: 'Library',
+                   tiding_type: 'System', status: 1)
+  end
+end
\ No newline at end of file
diff --git a/app/services/libraries/refuse_apply_service.rb b/app/services/libraries/refuse_apply_service.rb
new file mode 100644
index 000000000..9b249b6fa
--- /dev/null
+++ b/app/services/libraries/refuse_apply_service.rb
@@ -0,0 +1,39 @@
+class Libraries::RefuseApplyService < ApplicationService
+  Error = Class.new(StandardError)
+
+  attr_reader :library_apply, :library, :user, :params
+
+  def initialize(library_apply, user, params)
+    @library_apply = library_apply
+    @library       = library_apply.library
+    @user          = user
+    @params        = params
+  end
+
+  def call
+    reason = params[:reason].to_s.strip
+    raise Error, '原因不能为空' if reason.blank?
+    raise Error, '该状态下不能进行此操作' unless library_apply.may_refuse?
+
+    ActiveRecord::Base.transaction do
+      library_apply.reason     = reason
+      library_apply.refused_at = Time.current
+      library_apply.refuse
+      library_apply.save!
+
+      library.refuse!
+
+      # 将消息改为已处理
+      Tiding.where(container_id: library.id, container_type: 'Library', tiding_type: 'Apply', status: 0).update_all(status: 1)
+      notify_library_author!
+    end
+  end
+
+  private
+
+  def notify_library_author!
+    Tiding.create!(user_id: library.user_id, trigger_user_id: 1,
+                   container_id: library.id, container_type: 'Library',
+                   tiding_type: 'System', status: 2, extra: library_apply.reason)
+  end
+end
\ No newline at end of file
diff --git a/app/services/libraries/save_service.rb b/app/services/libraries/save_service.rb
new file mode 100644
index 000000000..45cd033dd
--- /dev/null
+++ b/app/services/libraries/save_service.rb
@@ -0,0 +1,69 @@
+class Libraries::SaveService < ApplicationService
+  Error = Class.new(StandardError)
+
+  attr_reader :library, :user, :params
+
+  def initialize(library, user, params)
+    @library = library
+    @user    = user
+    @params  = params
+  end
+
+  def call
+    Libraries::SaveForm.new(params).validate!
+
+    if library.new_record?
+      library.user_id = user.id
+      library.generate_uuid
+    end
+
+    ActiveRecord::Base.transaction do
+      library.assign_attributes(library_params)
+      library.save!
+
+      deal_library_tag!
+      deal_attachments!
+
+      Libraries::SubmitService.call(library) if with_publish?
+    end
+
+    library
+  rescue Libraries::SubmitService::Error => ex
+    raise Error, ex.message
+  end
+
+  private
+
+  def deal_library_tag!
+    new_tag_ids = LibraryTag.where(id: Array.wrap(params[:tag_ids]).compact).pluck(:id)
+    old_tag_ids = library.library_library_tags.pluck(:library_tag_id)
+
+    # 删除标签
+    destroy_ids = old_tag_ids - new_tag_ids
+    library.library_library_tags.where(library_tag_id: destroy_ids).delete_all
+
+    # 创建标签
+    created_ids = new_tag_ids - old_tag_ids
+    created_ids.each do |id|
+      library.library_library_tags.create!(library_tag_id: id)
+    end
+  end
+
+  def deal_attachments!
+    attachment_ids = Array.wrap(params[:attachment_ids]).compact.map(&:to_i)
+    old_attachment_id = library.attachments.pluck(:id)
+
+    destroy_ids = old_attachment_id - attachment_ids
+    library.attachments.where(id: destroy_ids).delete_all
+
+    Attachment.where(id: attachment_ids, author_id: user.id).update_all(container: library)
+  end
+
+  def library_params
+    params.slice(*%i[title content author_name author_school_name cover_id])
+  end
+
+  def with_publish?
+    params[:publish].to_s == 'true'
+  end
+end
diff --git a/app/services/libraries/submit_service.rb b/app/services/libraries/submit_service.rb
new file mode 100644
index 000000000..ab7af2910
--- /dev/null
+++ b/app/services/libraries/submit_service.rb
@@ -0,0 +1,32 @@
+class Libraries::SubmitService < ApplicationService
+  Error = Class.new(StandardError)
+
+  attr_reader :library
+
+  def initialize(library)
+    @library = library
+  end
+
+  def call
+    return if library.processing? || library.published?
+
+    raise Error, '该状态下不能提交审核' unless library.may_submit?
+
+    ActiveRecord::Base.transaction do
+      library.published_at = Time.current
+      library.submit
+      library.save!
+
+      library.library_applies.create!
+      send_library_apply_notify!
+    end
+  end
+
+  private
+
+  def send_library_apply_notify!
+    Tiding.create!(user_id: 1, trigger_user_id: library.user_id,
+                   container_id: library.id, container_type: 'Library',
+                   tiding_type: 'Apply', status: 0)
+  end
+end
\ No newline at end of file
diff --git a/app/views/libraries/index.json.jbuilder b/app/views/libraries/index.json.jbuilder
new file mode 100644
index 000000000..c58d390b0
--- /dev/null
+++ b/app/views/libraries/index.json.jbuilder
@@ -0,0 +1,16 @@
+json.count @count
+json.libraries do
+  json.array! @libraries.each do |library|
+    json.extract! library, :id, :title, :content, :author_name, :author_school_name, :status, :visited_count
+
+    json.cover_url library.cover_id.present? ? download_url(library.cover) : nil
+
+    json.praise_count library.praise_tread_cache&.praise_num || 0
+    json.download_count @download_count_map.fetch(library.id, 0)
+
+    json.published_at library.display_published_at
+    json.created_at library.display_created_at
+
+    json.tags library.library_tags.map(&:name)
+  end
+end
\ No newline at end of file
diff --git a/app/views/libraries/show.json.jbuilder b/app/views/libraries/show.json.jbuilder
new file mode 100644
index 000000000..0f4b6ea17
--- /dev/null
+++ b/app/views/libraries/show.json.jbuilder
@@ -0,0 +1,46 @@
+library = current_library
+
+json.extract! library, :id, :uuid, :title, :content, :author_name, :author_school_name, :status, :visited_count
+
+json.praise_count library.praise_tread_cache&.praise_num || 0
+
+json.published_at library.display_published_at
+json.created_at library.display_created_at
+
+# 创建者
+json.creator do
+  json.partial! 'users/user_simple', user: library.user
+end
+
+# 封面
+if library.cover_id.present?
+  json.cover do
+    json.partial! 'attachments/attachment_simple', attachment: library.cover
+  end
+else
+  json.cover nil
+end
+
+json.attachments library.attachments, partial: 'attachments/attachment_small', as: :attachment
+
+# 标签
+json.tags do
+  json.array! library.library_tags.each do |tag|
+    json.extract! tag, :id, :name
+  end
+end
+
+# 操作权限
+json.operation do
+  if current_user&.logged?
+    manageable = library_manageable?(library)
+
+    json.can_deletable manageable
+    json.can_editable manageable
+    json.user_praised PraiseTread.exists?(user_id: current_user&.id)
+  else
+    json.can_deletable false
+    json.can_editable false
+    json.user_praised false
+  end
+end
diff --git a/config/locales/forms/save_library_form.zh-CN.yml b/config/locales/forms/save_library_form.zh-CN.yml
new file mode 100644
index 000000000..e28fa2a55
--- /dev/null
+++ b/config/locales/forms/save_library_form.zh-CN.yml
@@ -0,0 +1,12 @@
+'zh-CN':
+  activemodel:
+    attributes:
+      libraries/save_form:
+        title: 标题
+        content: 描述
+        author_name: 作者名称
+        author_school_name: 作者单位
+        cover_id: 封面
+        publish: ''
+        attachment_ids: 附件
+        tag_ids: 标签
diff --git a/config/routes.rb b/config/routes.rb
index 9da4d4a7e..16140e99c 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -690,6 +690,8 @@ Rails.application.routes.draw do
         post :win, on: :collection
       end
     end
+
+    resources :libraries, only: [:index, :show, :create, :update, :destroy]
   end
 
   #git 认证回调