[#9] [Backend] As a user, I can upload a CSV file, [#12] [UI] As a user, I can upload a CSV file

app/controllers/search_stats_controller.rb

@@ -1,8 +1,38 @@
 # frozen_string_literal: true
 
+require 'csv'
+
 class SearchStatsController < ApplicationController
+  ALLOWED_MIME_TYPE = 'text/csv'
+  MAXIMUM_KEYWORDS = 1000
+
   # GET /search_stats
   def index
     @pagy, @search_stats = pagy(SearchStat.all)
   end
+
+  def new
+    search_stat = SearchStat.new
+
+    render :new, locals: { search_stat: search_stat }
+  end
+
+  def create
+    csv_file = params[:csv_file]
+
+    raise 'Invalid file type' unless csv_file.content_type == ALLOWED_MIME_TYPE
+
+    csv_file_content = params[:csv_file].read
+    keywords = CSV.parse(csv_file_content).flatten.compact_blank
+
+    raise 'Invalid file data' unless keywords.any?
+    raise 'Too many keywords' unless keywords.count <= MAXIMUM_KEYWORDS
+
+    keywords.map do |keyword|
+      search_stat = SearchStat.new({ keyword: keyword, user_id: current_user.id })
+      search_stat.save!
+    end
+
+    redirect_to search_stats_path
+  end
 end

app/models/search_stat.rb

@@ -2,5 +2,4 @@
 
 class SearchStat < ApplicationRecord
   validates :keyword, presence: true
-  validates :raw_response, presence: true
 end

app/views/search_stats/new.html.erb

@@ -0,0 +1,4 @@
+<%= form_with url: '/search_stats', multipart: true do |form| %>
+  <%= file_field_tag :csv_file, accept: 'text/csv', class: 'form-control' %>
+  <%= form.submit 'Upload', class: 'btn btn-primary mt-3' %>
+<% end %>

config/routes.rb

@@ -8,5 +8,5 @@
   root "home#index"
 
   get "/health_check", to: 'health_check#health_check', as: :rails_health_check
-  resources :search_stats, only: [:index]
+  resources :search_stats, only: [:index, :create, :new]
 end

db/seeds.rb

@@ -8,6 +8,8 @@
 
 require 'fabrication'
 
+Fabricate(:user, email: 'demo@example.com', password: 'nimbleHq1234')
+
 # Generate dummy data for SearchStat
 10.times do
   Fabricate(:search_stat)

spec/fixtures/files/invalid_data.csv

@@ -0,0 +1,3 @@
+
+
+

spec/fixtures/files/invalid_type.txt

@@ -0,0 +1,3 @@
+1st keyword
+2nd keyword
+3rd keyword

spec/fixtures/files/keywords.csv

@@ -0,0 +1,3 @@
+1st keyword
+2nd keyword
+3rd keyword