Implement CSV import and conversion to contestants

app/controllers/contestants_controller.rb

@@ -45,15 +45,48 @@ class ContestantsController < ApplicationController
   def import
     authorize @contest
 
-    if params[:csv_import]
-      @csv_import = CsvImport.new(params.require(:csv_import).permit(:file, :separator))
-      if @csv_import.save
-        @csv_import = CsvImport.new
-      else
-        render :import, status: :unprocessable_entity
-      end
+    @csv_import = CsvImport.new
+  end
+
+  def upload_csv
+    authorize @contest
+
+    @csv_import = CsvImport.new(params.require(:csv_import).permit(:file, :separator))
+    if @csv_import.save
+      redirect_to "/contests/#{@contest.id}/import/#{@csv_import.id}"
     else
-      @csv_import = CsvImport.new
+      render :import, status: :unprocessable_entity
+    end
+  end
+
+  def convert_csv
+    authorize @contest
+
+    @csv_import = CsvImport.find(params[:id])
+    @content = JSON.parse(@csv_import.content)
+    @form = Forms::CsvConversionForm.new
+  end
+
+  def finalize_import
+    authorize @contest
+
+    @csv_import = CsvImport.find(params[:id])
+    @content = JSON.parse(@csv_import.content)
+    all_params = params.require(:forms_csv_conversion_form)
+    @form = Forms::CsvConversionForm.new(params.require(:forms_csv_conversion_form).permit(:email_column, :name_column))
+    if @form.valid?
+      @content.each_with_index do |row, i|
+        if all_params["row_#{i}".to_sym] == "1"
+          if @form.email_column == -1
+            Contestant.create(name: row[@form.name_column], contest: @contest)
+          else
+            Contestant.create(name: row[@form.name_column], email: row[@form.email_column], contest: @contest)
+          end
+        end
+      end
+      redirect_to contest_path(@contest)
+    else
+      render :convert_csv, status: :unprocessable_entity
     end
   end