init project

app/imports/admins/import_course_member_excel.rb

@@ -0,0 +1,20 @@
+class Admins::ImportCourseMemberExcel < BaseImportXlsx
+  Data = Struct.new(:student_id, :name, :course_id, :role, :course_group_name, :school_id)
+
+  def read_each(&block)
+    sheet.each_row_streaming(pad_cells: true, offset: 1) do |row|
+      data = row.map(&method(:cell_value))[0..5]
+      block.call Data.new(*data)
+    end
+  end
+
+  private
+
+  def check_sheet_valid!
+    raise_import_error('请按照模板格式导入') if sheet.row(1).size != 6
+  end
+
+  def cell_value(obj)
+    obj&.cell_value&.to_s&.strip
+  end
+end

app/imports/admins/import_discipline_excel.rb

@@ -0,0 +1,16 @@
+class Admins::ImportDisciplineExcel < BaseImportXlsx
+  DisciplineData = Struct.new(:discipline_name, :sub_discipline_name)
+
+  def read_each(&block)
+    sheet.each_row_streaming(pad_cells: true, offset: 2) do |row|
+      data = row.map(&method(:cell_value))[1..2]
+      block.call DisciplineData.new(*data)
+    end
+  end
+
+  private
+
+  def cell_value(obj)
+    obj&.cell_value
+  end
+end

app/imports/admins/import_user_excel.rb

@@ -0,0 +1,33 @@
+class Admins::ImportUserExcel < BaseImportXlsx
+  UserData = Struct.new(:student_id, :name, :department_name, :identity, :technical_title, :phone)
+
+  def read_each(&block)
+    sheet.each_row_streaming(pad_cells: true, offset: 3) do |row|
+      data = row.map(&method(:cell_value))[0..5]
+      block.call UserData.new(*data)
+    end
+  end
+
+  def school
+    @school ||= begin
+      school_id = sheet.cell(1, 1).to_s.strip
+      school_name = sheet.cell(1, 2).to_s.strip
+
+      School.find_by(id: school_id, name: school_name)
+    end
+  end
+
+  def identifier
+    @_identifier ||= sheet.cell(2, 1).to_s.strip
+  end
+
+  private
+
+  def check_sheet_valid!
+    raise_import_error('请按照模板格式导入') if school.blank?
+  end
+
+  def cell_value(obj)
+    obj&.cell_value
+  end
+end

app/imports/application_import.rb

@@ -0,0 +1,11 @@
+class ApplicationImport
+  Error = Class.new(StandardError)
+
+  def logger(msg)
+    Rails.logger.error(msg)
+  end
+
+  def raise_import_error(message)
+    raise Error, message
+  end
+end

app/imports/base_import_excel.rb

@@ -0,0 +1,29 @@
+class BaseImportExcel < ApplicationImport
+  Error = Class.new(StandardError)
+
+  attr_reader :sheet
+
+  def initialize(path)
+    raise Error, '不支持的文件格式' unless path.end_with?('.xls') || path.end_with?('.xlsx')
+
+    begin
+      @sheet = Roo::Spreadsheet.open(path).sheet(0)
+    rescue Exception => ex
+      logger ex.message
+      ex.backtrace.each(&method(:logger))
+      raise Error, '打开文件失败'
+    end
+
+    check_sheet_valid!
+  end
+
+  def read_each(&block);end
+
+  private
+
+  def check_sheet_valid!;end
+
+  def raise_import_error(message)
+    raise Error, message
+  end
+end

app/imports/base_import_xlsx.rb

@@ -0,0 +1,23 @@
+class BaseImportXlsx < ApplicationImport
+
+  attr_reader :sheet
+
+  def initialize(path)
+    raise Error, '只支持xlsx格式' unless !path.is_a?(String) || path.end_with?('.xlsx')
+
+    begin
+      @sheet = Roo::Excelx.new(path)
+    rescue Exception => ex
+      Util.logger_error(ex)
+      raise Error, '打开文件失败'
+    end
+
+    check_sheet_valid!
+  end
+
+  def read_each(&block);end
+
+  private
+
+  def check_sheet_valid!;end
+end