Cldc 491 rent and charges validations (#411)

* Add rent ranges table and basic hard range validation

Co-authored-by: baarkerlounger  <baarkerlounger@users.noreply.github.com>

* Add import rent ranges rake task

Co-authored-by: baarkerlounger  <baarkerlounger@users.noreply.github.com>

* Update the rent range validation to validate all related fields and check for the correct collection year

* Add ranges data

* add error messages

* Add readme step

* extract get collection year method

* rename method

* create instead of find and create laRentRange record

Co-authored-by: baarkerlounger  <baarkerlounger@users.noreply.github.com>

README.md

@@ -34,10 +34,16 @@ Pre-requisites:
 5. Seed the database if required:\
 `rake db:seed`
 
-6. Install the frontend depenencies:\
+6. Seed the database with rent ranges if required (~7000 rows per year):\
+`rake "data_import:rent_ranges[<start_year>,<rent_ranges_path>]"`
+
+    For 2021-2022 ranges run:\
+    `rake "data_import:rent_ranges[2021,config/rent_range_data/2021.csv]"`
+
+7. Install the frontend depenencies:\
   `yarn install`
 
-7. Start the dev servers using foreman:\
+8. Start the dev servers using foreman:\
   `./bin/dev`
 
   Or start them individually:\

app/models/case_log.rb

@@ -48,15 +48,15 @@ class CaseLog < ApplicationRecord
     FormHandler.instance.get_form(form_name) || FormHandler.instance.forms.first.second
   end
 
+  def collection_start_year
+    window_end_date = Time.zone.local(startdate.year, 4, 1)
+    startdate < window_end_date ? startdate.year - 1 : startdate.year
+  end
+
   def form_name
     return unless startdate
 
-    window_end_date = Time.zone.local(startdate.year, 4, 1)
-    if startdate < window_end_date
-      "#{startdate.year - 1}_#{startdate.year}"
-    else
-      "#{startdate.year}_#{startdate.year + 1}"
-    end
+    "#{collection_start_year}_#{collection_start_year + 1}"
   end
 
   def self.editable_fields

app/models/la_rent_range.rb

@@ -0,0 +1,2 @@
+class LaRentRange < ApplicationRecord
+end

app/models/validations/financial_validations.rb

@@ -65,7 +65,7 @@ module Validations::FinancialValidations
       record.errors.add :tshortfall, I18n.t("validations.financial.tshortfall.more_than_rent")
     end
 
-    if record.tcharge.present? && weekly_value_in_range(record, "tcharge", 9.99)
+    if record.tcharge.present? && weekly_value_in_range(record, "tcharge", 0, 9.99)
       record.errors.add :tcharge, I18n.t("validations.financial.tcharge.under_10")
     end
 
@@ -77,6 +77,7 @@ module Validations::FinancialValidations
     end
 
     validate_charges(record)
+    validate_rent_range(record)
   end
 
 private
@@ -121,13 +122,28 @@ private
     %i[scharge pscharge supcharg].each do |charge|
       maximum = CHARGE_MAXIMUMS.dig(charge, LANDLORD_VALUES[record.landlord], NEEDSTYPE_VALUES[record.needstype])
 
-      if maximum.present? && !weekly_value_in_range(record, charge, maximum)
+      if maximum.present? && !weekly_value_in_range(record, charge, 0, maximum)
         record.errors.add charge, I18n.t("validations.financial.rent.#{charge}.#{LANDLORD_VALUES[record.landlord]}.#{NEEDSTYPE_VALUES[record.needstype]}")
       end
     end
   end
 
-  def weekly_value_in_range(record, field, max)
-    record[field].present? && record.weekly_value(record[field]).present? && record.weekly_value(record[field]).between?(0, max)
+  def weekly_value_in_range(record, field, min, max)
+    record[field].present? && record.weekly_value(record[field]).present? && record.weekly_value(record[field]).between?(min, max)
+  end
+
+  def validate_rent_range(record)
+    return if record.startdate.blank?
+
+    collection_year = record.collection_start_year
+    rent_range = LaRentRange.find_by(start_year: collection_year, la: record.la, beds: record.beds, lettype: record.lettype)
+
+    if rent_range.present? && !weekly_value_in_range(record, "brent", rent_range.hard_min, rent_range.hard_max)
+      record.errors.add :brent, I18n.t("validations.financial.brent.not_in_range")
+      record.errors.add :beds, I18n.t("validations.financial.brent.beds.not_in_range")
+      record.errors.add :la, I18n.t("validations.financial.brent.la.not_in_range")
+      record.errors.add :rent_type, I18n.t("validations.financial.brent.rent_type.not_in_range")
+      record.errors.add :needstype, I18n.t("validations.financial.brent.needstype.not_in_range")
+    end
   end
 end

config/locales/en.yml

@@ -47,7 +47,7 @@ en:
       taken: "Email already exists"
       invalid: "Enter an email address in the correct format, like name@example.com"
       blank: "Enter an email address"
-    
+
     setup:
       intermediate_rent_product_name:
         blank: "Enter name of other intermediate rent product"
@@ -118,6 +118,16 @@ en:
           other_landlord:
             general_needs: "Support charge must be between £0 and £60 per week if the landlord is another RP and it is a general needs letting"
             supported_housing: "Support charge must be between £0 and £120 per week if the landlord is another RP and it is a suported housing letting"
+        brent:
+          not_in_range: "Basic rent is outside of the expected range based on the lettings type, local authority and number of bedrooms"
+          la:
+            not_in_range: "Basic rent is outside of the expected range based on this local authority"
+          beds:
+            not_in_range: "Basic rent is outside of the expected range based on this number of bedrooms"
+          needstype:
+            not_in_range: "Basic rent is outside of the expected range based on this lettings type"
+          rent_type:
+            not_in_range: "Basic rent is outside of the expected range based on this lettings type"
       charges:
         complete_1_of_3: 'Only one question out of "Total charge", "Charges for carehomes" and "Does the household pay rent or charges?" needs to be selected and completed'
       tcharge:

db/migrate/20220321093810_create_la_rent_ranges.rb

@@ -0,0 +1,18 @@
+class CreateLaRentRanges < ActiveRecord::Migration[7.0]
+  def change
+    create_table :la_rent_ranges do |t|
+      t.integer :ranges_rent_id
+      t.integer :lettype
+      t.string :la
+      t.integer :beds
+      t.decimal :soft_min, precision: 10, scale: 2
+      t.decimal :soft_max, precision: 10, scale: 2
+      t.decimal :hard_min, precision: 10, scale: 2
+      t.decimal :hard_max, precision: 10, scale: 2
+      t.integer :start_year
+
+      t.index %i[start_year lettype beds la], unique: true
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -233,6 +233,21 @@ ActiveRecord::Schema[7.0].define(version: 202202071123100) do
     t.index ["owning_organisation_id"], name: "index_case_logs_on_owning_organisation_id"
   end
 
+  create_table "la_rent_ranges", force: :cascade do |t|
+    t.integer "ranges_rent_id"
+    t.integer "lettype"
+    t.string "la"
+    t.integer "beds"
+    t.decimal "soft_min", precision: 10, scale: 2
+    t.decimal "soft_max", precision: 10, scale: 2
+    t.decimal "hard_min", precision: 10, scale: 2
+    t.decimal "hard_max", precision: 10, scale: 2
+    t.integer "start_year"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["start_year", "lettype", "beds", "la"], name: "index_la_rent_ranges_on_start_year_and_lettype_and_beds_and_la", unique: true
+  end
+
   create_table "organisations", force: :cascade do |t|
     t.string "name"
     t.string "phone"

lib/tasks/rent_ranges.rake

@@ -0,0 +1,29 @@
+require "csv"
+
+namespace :data_import do
+  desc "Import annual rent range data"
+  task :rent_ranges, %i[start_year path] => :environment do |_task, args|
+    start_year = args[:start_year]
+    path = args[:path]
+    count = 0
+
+    raise "Usage: rake data_import:rent_ranges[start_year,'path/to/csv_file']" if path.blank? || start_year.blank?
+
+    CSV.foreach(path, headers: true) do |row|
+      LaRentRange.upsert(
+        { ranges_rent_id: row["ranges_rent_id"],
+          lettype: row["lettype"],
+          beds: row["beds"],
+          start_year:,
+          la: row["la"],
+          soft_min: row["soft_min"],
+          soft_max: row["soft_max"],
+          hard_min: row["hard_min"],
+          hard_max: row["hard_max"] },
+        unique_by: %i[start_year lettype beds la],
+      )
+      count += 1
+    end
+    pp "Created/updated #{count} records"
+  end
+end

spec/fixtures/files/rent_ranges.csv

@@ -0,0 +1,6 @@
+ranges_rent_id,lettype,la,beds,soft_min,soft_max,hard_min,hard_max
+1,1,E07000223,1,58.37,125.59,26.36,179.73
+327,1,E07000223,2,72.5,149.4,26.36,190.57
+653,1,E07000223,3,82.85,164.58,26.36,207.89
+979,1,E07000223,4,91.33,181.9,26.36,226.27
+1305,3,E07000223,1,52.73,118.01,26.36,162.4

spec/lib/tasks/rent_range_import_spec.rb

@@ -0,0 +1,51 @@
+require "rails_helper"
+require "rake"
+
+RSpec.describe "data_import" do
+  describe ":rent_ranges", type: :task do
+    subject(:task) { Rake::Task["data_import:rent_ranges"] }
+
+    before do
+      Rake.application.rake_require("tasks/rent_ranges")
+      Rake::Task.define_task(:environment)
+      task.reenable
+    end
+
+    context "when the rake task is run" do
+      let(:start_year) { 2021 }
+      let(:rent_ranges_file_path) { "./spec/fixtures/files/rent_ranges.csv" }
+      let(:wrong_file_path) { "/test/no_csv_here.csv" }
+
+      before do
+        LaRentRange.delete_all
+      end
+
+      it "creates new rent range records" do
+        expect { task.invoke(start_year, rent_ranges_file_path) }.to change(LaRentRange, :count).by(5)
+        expect(LaRentRange.where(ranges_rent_id: 1).exists?).to be true
+      end
+
+      it "raises an error when no path is given" do
+        expect { task.invoke(start_year, nil) }.to raise_error(RuntimeError, "Usage: rake data_import:rent_ranges[start_year,'path/to/csv_file']")
+      end
+
+      it "raises an error when no file exists at the given path" do
+        expect { task.invoke(start_year, wrong_file_path) }.to raise_error(Errno::ENOENT)
+      end
+
+      it "asks for a start year if it is not given" do
+        expect { task.invoke(nil, rent_ranges_file_path) }.to raise_error(RuntimeError, "Usage: rake data_import:rent_ranges[start_year,'path/to/csv_file']")
+      end
+
+      context "when a record already exists with a matching index of la, beds, start year and lettype" do
+        let!(:rent_range) { LaRentRange.create(lettype: 1, la: "E07000223", beds: 2, soft_min: 53.5, soft_max: 149.4, hard_min: 20.36, hard_max: 200.57, start_year: 2021) }
+
+        it "updates rent ranges if the record is matched on la, beds, start year and lettype" do
+          task.invoke(start_year, rent_ranges_file_path)
+          rent_range.reload
+          expect(rent_range.hard_max).to eq(190.57)
+        end
+      end
+    end
+  end
+end

spec/models/validations/financial_validations_spec.rb

@@ -713,6 +713,93 @@ RSpec.describe Validations::FinancialValidations do
         expect(record.errors["household_charge"])
           .to be_empty
       end
+
+      context "when validating ranges based on LA and needstype" do
+        before do
+          LaRentRange.create(
+            ranges_rent_id: "1",
+            la: "E07000223",
+            beds: 1,
+            lettype: 1,
+            soft_min: 12.41,
+            soft_max: 89.54,
+            hard_min: 9.87,
+            hard_max: 100.99,
+            start_year: 2021,
+          )
+        end
+
+        it "validates hard minimum" do
+          record.lettype = 1
+          record.period = 1
+          record.la = "E07000223"
+          record.beds = 1
+          record.year = 2021
+          record.startdate = Time.zone.local(2021, 9, 17)
+          record.brent = 9.17
+
+          financial_validator.validate_rent_amount(record)
+          expect(record.errors["brent"])
+            .to include(match I18n.t("validations.financial.brent.not_in_range"))
+        end
+
+        it "validates hard max" do
+          record.lettype = 1
+          record.period = 1
+          record.la = "E07000223"
+          record.beds = 1
+          record.startdate = Time.zone.local(2021, 9, 17)
+          record.year = 2021
+          record.brent = 200
+
+          financial_validator.validate_rent_amount(record)
+          expect(record.errors["brent"])
+            .to include(match I18n.t("validations.financial.brent.not_in_range"))
+          expect(record.errors["beds"])
+            .to include(match I18n.t("validations.financial.brent.beds.not_in_range"))
+          expect(record.errors["la"])
+            .to include(match I18n.t("validations.financial.brent.la.not_in_range"))
+          expect(record.errors["rent_type"])
+            .to include(match I18n.t("validations.financial.brent.rent_type.not_in_range"))
+          expect(record.errors["needstype"])
+            .to include(match I18n.t("validations.financial.brent.needstype.not_in_range"))
+        end
+
+        it "validates hard max for correct collection year" do
+          record.lettype = 1
+          record.period = 1
+          record.la = "E07000223"
+          record.startdate = Time.zone.local(2022, 2, 5)
+          record.beds = 1
+          record.year = 2022
+          record.month = 2
+          record.day = 5
+          record.brent = 200
+
+          financial_validator.validate_rent_amount(record)
+          expect(record.errors["brent"])
+            .to include(match I18n.t("validations.financial.brent.not_in_range"))
+          expect(record.errors["beds"])
+            .to include(match I18n.t("validations.financial.brent.beds.not_in_range"))
+          expect(record.errors["la"])
+            .to include(match I18n.t("validations.financial.brent.la.not_in_range"))
+          expect(record.errors["rent_type"])
+            .to include(match I18n.t("validations.financial.brent.rent_type.not_in_range"))
+          expect(record.errors["needstype"])
+            .to include(match I18n.t("validations.financial.brent.needstype.not_in_range"))
+        end
+
+        it "does not error if some of the fields are missing" do
+          record.managing_organisation.provider_type = 2
+          record.year = 2021
+          record.startdate = Time.zone.local(2021, 9, 17)
+          record.brent = 200
+
+          financial_validator.validate_rent_amount(record)
+          expect(record.errors["brent"])
+            .to be_empty
+        end
+      end
     end
   end
 end