init project

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_type: library.class.to_s, container_id: library.id)
+  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