feat: 增加导出 导入时候 excel的模版

Gemfile.lock

 PATH
   remote: .
   specs:
-    tallty_import_export (1.0.35)
+    tallty_import_export (1.1.1)
       activesupport
       attr_json
       caxlsx
@@ -27,27 +27,31 @@ GEM
       tzinfo (~> 2.0)
     attr_json (1.4.0)
       activerecord (>= 5.0.0, < 7.1)
-    caxlsx (3.2.0)
+    caxlsx (3.3.0)
       htmlentities (~> 4.3, >= 4.3.4)
       marcel (~> 1.0)
       nokogiri (~> 1.10, >= 1.10.4)
       rubyzip (>= 1.3.0, < 3)
     concurrent-ruby (1.1.10)
+    connection_pool (2.3.0)
     diff-lcs (1.4.4)
     htmlentities (4.3.4)
-    i18n (1.10.0)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     marcel (1.0.2)
     mini_portile2 (2.8.0)
-    minitest (5.15.0)
-    nokogiri (1.13.4)
+    minitest (5.16.3)
+    nokogiri (1.13.9)
       mini_portile2 (~> 2.8.0)
       racc (~> 1.4)
     racc (1.6.0)
     rake (12.3.3)
-    redis (4.6.0)
-    redis-objects (1.5.1)
-      redis (~> 4.2)
+    redis (5.0.5)
+      redis-client (>= 0.9.0)
+    redis-client (0.10.0)
+      connection_pool
+    redis-objects (1.7.0)
+      redis
     roo (2.9.0)
       nokogiri (~> 1)
       rubyzip (>= 1.3.0, < 3.0.0)
@@ -77,7 +81,7 @@ GEM
       activesupport (>= 5.0)
     tallty_form (1.0.0)
       tallty_duck_record
-    tzinfo (2.0.4)
+    tzinfo (2.0.5)
       concurrent-ruby (~> 1.0)
     zip-zip (0.3)
       rubyzip (>= 1.0.0)

lib/tallty_import_export/import.rb

@@ -27,6 +27,64 @@ module TalltyImportExport
       end
     end
 
+    # 导出excel的空模版
+    def export_template_xlsx(**options)
+      process_options(options)
+
+      Axlsx::Package.new do |pack|
+        pack.use_shared_strings = true
+        workbook = pack.workbook
+
+        export_workbook workbook, **options
+
+        file_path = File.join(Rails.root, 'public', 'import')
+        FileUtils.mkdir_p(file_path) unless Dir.exist?(file_path)
+        file_name = "#{Time.now.strftime('%Y%m%d%H%M%S')}#{@filename}.xlsx"
+        file_path_with_name = File.join(file_path, file_name)
+        pack.serialize(file_path_with_name)
+        return file_path_with_name
+      end
+    end
+
+    def export_workbook(workbook, **options)
+      # excel导出样式
+      alignment = { vertical: :center, horizontal: :center }
+      border    = { color: '969696', style: :thin }
+      title1 = workbook.styles.add_style(alignment: alignment, border: border, sz: 12, b: true)
+      title2 = workbook.styles.add_style(alignment: alignment, border: border, bg_color: '2a5caa', sz: 12, fg_color: 'fffffb')
+      title3 = workbook.styles.add_style(alignment: alignment.merge(wrap_text: true), border: border, sz: 10)
+      _sheet_name = (respond_to?(:sheet_name) ? sheet_name : nil) || options[:sheet_name]
+
+      header_obj = @headers
+
+      workbook.add_worksheet(name: _sheet_name) do |sheet|
+        index = 0
+
+        if respond_to?(:first_header)
+          row_index = Axlsx.col_ref(headers.size - 1)
+          sheet.merge_cells("A1:#{row_index}1")
+          sheet.add_row [first_header], style: title1, height: 30
+          index += 1
+        end
+
+        header_obj.header_lines.each do |header_line|
+          sheet.add_row(header_line.map(&:name), style: title2, height: 25)
+          index += 1
+        end
+
+        # 合并相同 header
+        header_obj.header_seq_to_axios.values.each do |axios_ary|
+          next unless axios_ary.count > 1
+
+          top_right = [axios_ary.map(&:first).min, axios_ary.map(&:last).min]
+          bottom_left = [axios_ary.map(&:first).max, axios_ary.map(&:last).max]
+          sheet.merge_cells(
+            Axlsx.cell_r(top_right.first, top_right.last) + ':' + Axlsx.cell_r(bottom_left.first, bottom_left.last),
+          )
+        end
+      end
+    end
+
     def exchange_to_ids(xlsx_file, associations, **options)
       errors = []
       ids = []