init project

app/controllers/admins/carousels_controller.rb

@@ -0,0 +1,86 @@
+class Admins::CarouselsController < Admins::BaseController
+  before_action :convert_file!, only: [:create]
+
+  helper_method :current_laboratory
+
+  def index
+    @images = current_laboratory.portal_images.order(position: :asc)
+  end
+
+  def create
+    position = current_laboratory.portal_images.count + 1
+
+    ActiveRecord::Base.transaction do
+      image = current_laboratory.portal_images.create!(create_params.merge(position: position))
+
+      file_path = Util::FileManage.disk_filename('PortalImage', image.id)
+      File.delete(file_path) if File.exist?(file_path) # 删除之前的文件
+      Util.write_file(@file, file_path)
+    end
+
+    flash[:success] = '保存成功'
+    redirect_to admins_laboratory_carousels_path(current_laboratory)
+  end
+
+  def update
+    current_image.update!(update_params)
+    render_ok
+  end
+
+  def destroy
+    ActiveRecord::Base.transaction do
+      current_image.destroy!
+      # 前移
+      current_laboratory.portal_images.where('position > ?', current_image.position)
+        .update_all('position = position - 1')
+
+      file_path = Util::FileManage.disk_filename('PortalImage', current_image.id)
+      File.delete(file_path) if File.exist?(file_path)
+    end
+    render_delete_success
+  end
+
+  def drag
+    move  = current_laboratory.portal_images.find_by(id: params[:move_id])
+    after = current_laboratory.portal_images.find_by(id: params[:after_id])
+
+    Admins::DragPortalImageService.call(current_laboratory, move, after)
+    render_ok
+  rescue Admins::DragPortalImageService::Error => e
+    render_error(e.message)
+  end
+
+  private
+
+  def current_laboratory
+    @_current_laboratory ||= Laboratory.find(params[:laboratory_id])
+  end
+
+  def current_image
+    @_current_image ||= current_laboratory.portal_images.find(params[:id])
+  end
+
+  def create_params
+    params.require(:portal_image).permit(:name, :link)
+  end
+
+  def update_params
+    params.permit(:name, :link, :status)
+  end
+
+  def convert_file!
+    max_size = 10 * 1024 * 1024 # 10M
+    file = params.dig('portal_image', 'image')
+    if file.class == ActionDispatch::Http::UploadedFile
+      @file = file
+      render_error('请上传文件') if @file.size.zero?
+      render_error('文件大小超过限制') if @file.size > max_size
+    else
+      file = file.to_s.strip
+      return render_error('请上传正确的图片') if file.blank?
+      @file = Util.convert_base64_image(file, max_size: max_size)
+    end
+  rescue Base64ImageConverter::Error => ex
+    render_error(ex.message)
+  end
+end