FIX: use hijack for processing bulk invites (#7679)

FIX: do not store bulk invite CSV file on server

app/controllers/invites_controller.rb

@@ -172,24 +172,31 @@ class InvitesController < ApplicationController
   def upload_csv
     guardian.ensure_can_bulk_invite_to_forum!(current_user)
 
-    file = params[:file] || params[:files].first
-    name = params[:name] || File.basename(file.original_filename, ".*")
-    extension = File.extname(file.original_filename)
+    hijack do
+      begin
+        file = params[:file] || params[:files].first
 
-    begin
-      data = if extension.downcase == ".csv"
-        path = Invite.create_csv(file, name)
-        Jobs.enqueue(:bulk_invite, filename: "#{name}#{extension}", current_user_id: current_user.id)
-        { url: path }
-      else
-        failed_json.merge(errors: [I18n.t("bulk_invite.file_should_be_csv")])
+        if File.read(file.tempfile).scan(/\n/).count.to_i > 50000
+          return render json: failed_json.merge(errors: [I18n.t("bulk_invite.max_rows")]), status: 422
+        end
+
+        invites = []
+        CSV.foreach(file.tempfile) do |row|
+          invite_hash = { email: row[0], groups: row[1], topic_id: row[2] }
+          if invite_hash[:email].present?
+            invites.push(invite_hash)
+          end
+        end
+        if invites.present?
+          Jobs.enqueue(:bulk_invite, invites: invites, current_user_id: current_user.id)
+          render json: success_json
+        else
+          render json: failed_json.merge(errors: [I18n.t("bulk_invite.error")]), status: 422
+        end
+      rescue
+        render json: failed_json.merge(errors: [I18n.t("bulk_invite.error")]), status: 422
       end
-    rescue
-      failed_json.merge(errors: [I18n.t("bulk_invite.error")])
     end
-    MessageBus.publish("/uploads/csv", data.as_json, user_ids: [current_user.id])
-
-    render json: success_json
   end
 
   def fetch_username

app/jobs/regular/bulk_invite.rb

@@ -1,6 +1,5 @@
 # frozen_string_literal: true
 
-require 'csv'
 require_dependency 'system_message'
 
 module Jobs
@@ -18,48 +17,38 @@ module Jobs
     end
 
     def execute(args)
-      filename = args[:filename]
-      raise Discourse::InvalidParameters.new(:filename) if filename.blank?
+      invites = args[:invites]
+      raise Discourse::InvalidParameters.new(:invites) if invites.blank?
 
       @current_user = User.find_by(id: args[:current_user_id])
       raise Discourse::InvalidParameters.new(:current_user_id) unless @current_user
       @guardian = Guardian.new(@current_user)
 
-      csv_path = "#{Invite.base_directory}/#{filename}"
-
-      # read csv file, and send out invitations
-      read_csv_file(csv_path)
+      process_invites(invites)
     ensure
-      # send notification to user regarding progress
       notify_user
-      File.delete(csv_path) if csv_path
     end
 
     private
 
-    def read_csv_file(csv_path)
-      file = File.open(csv_path, encoding: 'bom|utf-8')
-      CSV.new(file).each do |csv_info|
-        if csv_info[0]
-          if (EmailValidator.email_regex =~ csv_info[0])
-            # email is valid
-            send_invite(csv_info, $INPUT_LINE_NUMBER)
-            @sent += 1
-          else
-            # invalid email
-            save_log "Invalid Email '#{csv_info[0]}' at line number '#{$INPUT_LINE_NUMBER}'"
-            @failed += 1
-          end
+    def process_invites(invites)
+      invites.each do |invite|
+        if (EmailValidator.email_regex =~ invite[:email])
+          # email is valid
+          send_invite(invite)
+          @sent += 1
+        else
+          # invalid email
+          save_log "Invalid Email '#{invite[:email]}"
+          @failed += 1
         end
       end
     rescue Exception => e
       save_log "Bulk Invite Process Failed -- '#{e.message}'"
       @failed += 1
-    ensure
-      file&.close
     end
 
-    def get_groups(group_names, csv_line_number)
+    def get_groups(group_names)
       groups = []
 
       if group_names
@@ -73,7 +62,7 @@ module Jobs
             groups.push(group)
           else
             # invalid group
-            save_log "Invalid Group '#{group_name}' at line number '#{csv_line_number}'"
+            save_log "Invalid Group '#{group_name}'"
             @failed += 1
           end
         }
@@ -82,13 +71,13 @@ module Jobs
       groups
     end
 
-    def get_topic(topic_id, csv_line_number)
+    def get_topic(topic_id)
       topic = nil
 
       if topic_id
         topic = Topic.find_by_id(topic_id)
         if topic.nil?
-          save_log "Invalid Topic ID '#{topic_id}' at line number '#{csv_line_number}'"
+          save_log "Invalid Topic ID '#{topic_id}'"
           @failed += 1
         end
       end
@@ -96,10 +85,10 @@ module Jobs
       return topic
     end
 
-    def send_invite(csv_info, csv_line_number)
-      email = csv_info[0]
-      groups = get_groups(csv_info[1], csv_line_number)
-      topic = get_topic(csv_info[2], csv_line_number)
+    def send_invite(invite)
+      email = invite[:email]
+      groups = get_groups(invite[:groups])
+      topic = get_topic(invite[:topic_id])
 
       begin
         if user = User.find_by_email(email)
@@ -171,7 +160,5 @@ module Jobs
 
       result
     end
-
   end
-
 end

app/models/invite.rb

@@ -242,14 +242,6 @@ class Invite < ActiveRecord::Base
   def self.base_directory
     File.join(Rails.root, "public", "uploads", "csv", RailsMultisite::ConnectionManagement.current_db)
   end
-
-  def self.create_csv(file, name)
-    extension = File.extname(file.original_filename)
-    path = "#{Invite.base_directory}/#{name}#{extension}"
-    FileUtils.mkdir_p(Pathname.new(path).dirname)
-    File.open(path, "wb") { |f| f << file.tempfile.read }
-    path
-  end
 end
 
 # == Schema Information

config/locales/server.en.yml

@@ -218,6 +218,7 @@ en:
 
   bulk_invite:
     file_should_be_csv: "The uploaded file should be of csv format."
+    max_rows: "Maximum of 50,000 invites can be sent at a time. Try splitting the file in smaller parts."
     error: "There was an error uploading that file. Please try again later."
 
   topic_invite:

spec/fixtures/csv/bulk_invite.csv

@@ -1,2 +0,0 @@
-test2@discourse.org
-test@discourse.org,GROUP1;group2,999

spec/jobs/bulk_invite_spec.rb

@@ -10,30 +10,22 @@ describe Jobs::BulkInvite do
     fab!(:group2) { Fabricate(:group, name: 'group2') }
     fab!(:topic) { Fabricate(:topic, id: 999) }
     let(:email) { "test@discourse.org" }
-    let(:basename) { "bulk_invite.csv" }
-    let(:filename) { "#{Invite.base_directory}/#{basename}" }
+    let(:invites) { [{ email: 'test2@discourse.org' }, { email: 'test@discourse.org', groups: 'GROUP1;group2', topic_id: 999 }] }
 
-    before do
-      Invite.create_csv(
-        fixture_file_upload("#{Rails.root}/spec/fixtures/csv/#{basename}"),
-        "bulk_invite"
-      )
-    end
-
-    it 'raises an error when the filename is missing' do
+    it 'raises an error when the invites array is missing' do
       expect { Jobs::BulkInvite.new.execute(current_user_id: user.id) }
-        .to raise_error(Discourse::InvalidParameters, /filename/)
+        .to raise_error(Discourse::InvalidParameters, /invites/)
     end
 
     it 'raises an error when current_user_id is not valid' do
-      expect { Jobs::BulkInvite.new.execute(filename: filename) }
+      expect { Jobs::BulkInvite.new.execute(invites: invites) }
         .to raise_error(Discourse::InvalidParameters, /current_user_id/)
     end
 
     it 'creates the right invites' do
       described_class.new.execute(
         current_user_id: admin.id,
-        filename: basename,
+        invites: invites
       )
 
       invite = Invite.last
@@ -53,7 +45,7 @@ describe Jobs::BulkInvite do
 
       described_class.new.execute(
         current_user_id: admin.id,
-        filename: basename,
+        invites: invites
       )
 
       invite = Invite.last
@@ -70,7 +62,7 @@ describe Jobs::BulkInvite do
 
       described_class.new.execute(
         current_user_id: user.id,
-        filename: basename
+        invites: invites
       )
 
       invite = Invite.last
@@ -90,7 +82,7 @@ describe Jobs::BulkInvite do
       expect do
         described_class.new.execute(
           current_user_id: admin.id,
-          filename: basename
+          invites: invites
         )
       end.to change { Invite.count }.by(1)