Add product category importer

app/controllers/suppliers/product_categories_controller.rb

@@ -9,6 +9,22 @@ module Suppliers
       respond_to do |format|
         format.html # index.html.erb
         format.json { render json: @product_categories }
+        format.yaml do
+          @product_categories.include_relation(:products)
+          h = {product_categories: []}
+          @product_categories.each do |product_category|
+            h[:product_categories] << {
+              name: product_category.name,
+              products: product_category.products.map{|product| {
+                name: product.name,
+                price: product.price,
+                code: product.code,
+                description: product.description
+              }}
+            }
+          end
+          render text: h.deep_stringify_keys.to_yaml
+        end
       end
     end
 
@@ -39,6 +55,18 @@ module Suppliers
       @product_category = ProductCategory.find(params[:id])
     end
 
+    def import
+      redirect_to({action: :index}, alert: 'no_file_given') and return unless params[:file].present?
+      result = ProductCategoriesImporter.new(current_supplier).import(params[:file].read)
+      if result.errors.any?
+        redirect_to({action: :index}, alert: result.errors.message)
+      else
+        redirect_to action: :index
+      end
+    rescue => e
+      redirect_to({action: :index}, alert: 'something went wrong')
+    end
+
     # POST /product_categories
     # POST /product_categories.json
     def create

app/services/product_categories_importer.rb

@@ -0,0 +1,68 @@
+class ProductCategoriesImporter
+  attr_reader :errors, :supplier, :skipped
+
+  def initialize(supplier)
+    @errors = Errors.new
+    @errors.importer = self
+    @supplier = supplier
+  end
+
+  def import(string)
+    h = YAML.load(string) rescue nil
+    return errors.add 'cannot_parse_yaml' unless h
+    return errors.add 'no_product_categories' unless h["product_categories"].is_a?(Array)
+    categories = supplier.product_categories
+    existing_products = supplier.products
+    @skipped = []
+    h["product_categories"].each do |product_category_spec|
+      skipped << {reason: 'empty_name', type: 'product_category'} and next unless product_category_spec['name'].present?
+      unless existing_category = categories.find{|pc| pc.name == product_category_spec['name']}
+        existing_category = ProductCategory.new
+        product_category_spec.each do |attribute, value|
+          existing_category.public_send "#{attribute}=", value if existing_category.respond_to? "#{attribute}="
+        end
+      end
+      existing_category.supplier = supplier # hard coded security
+      if existing_category.valid?
+        (product_category_spec['products'] || []).each do |product_spec|
+          skipped << {reason: 'empty_name', type: 'product'} and next unless product_spec['name'].present?
+
+          unless  existing_product = existing_products.find{|ep| ep.name == product_spec['name']}
+            existing_product = Product.new
+          end
+          product_spec.each do |product_attribute, product_value|
+            existing_product.public_send "#{product_attribute}=", product_value if existing_product.respond_to? "#{product_attribute}="
+          end
+
+          existing_product.supplier = supplier
+          if existing_product.save
+            existing_category.product_ids |= [existing_product.id]
+          else
+            skipped << {reason: 'could_not_save', type: 'product'}
+          end
+
+        end
+        existing_category.save
+      else
+        skipped << {reason: 'could_not_save', type: 'product_category'}
+      end
+    end
+    self
+  end
+
+  def success?
+    errors.empty?
+  end
+
+  class Errors < Hash
+    attr_accessor :importer
+    def add(message)
+      self[:message] = message
+      importer
+    end
+
+    def message
+      self[:message]
+    end
+  end
+end

app/views/suppliers/product_categories/index.html.slim

@@ -16,3 +16,8 @@
   - else
     = no_content_given model_class
 = supplier_form_actions :new, for: :product_categories
+
+.import.panel.hide
+  = form_tag import_suppliers_product_categories_path, multipart: true do
+    = file_field_tag :file
+    = submit_tag 'import'

config/routes.rb

@@ -137,6 +137,7 @@ Qwaiter::Application.routes.draw do
     resources :product_categories do
       collection do
         post :sort
+        post :import
       end
     end
     resources :orders, only: [:index, :show] do

wip.md

@@ -7,6 +7,8 @@ Supplier
 - english emails
 - form action button looks (Roos)
 - Add qr print functionality offering to send the stickers
+- Limit tables to section
+- Add qr-print button to tables
 
 User
 ----