Change user settings to be stored in a more optimal way (#23630)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

spec/models/user_settings_spec.rb

@@ -0,0 +1,110 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe UserSettings do
+  subject { described_class.new(json) }
+
+  let(:json) { {} }
+
+  describe '#[]' do
+    context 'when setting is not set' do
+      it 'returns default value' do
+        expect(subject[:always_send_emails]).to be false
+      end
+    end
+
+    context 'when setting is set' do
+      let(:json) { { default_language: 'fr' } }
+
+      it 'returns value' do
+        expect(subject[:default_language]).to eq 'fr'
+      end
+    end
+
+    context 'when setting was not defined' do
+      it 'raises error' do
+        expect { subject[:foo] }.to raise_error UserSettings::KeyError
+      end
+    end
+  end
+
+  describe '#[]=' do
+    context 'when value matches type' do
+      before do
+        subject[:always_send_emails] = true
+      end
+
+      it 'updates value' do
+        expect(subject[:always_send_emails]).to be true
+      end
+    end
+
+    context 'when value needs to be type-cast' do
+      before do
+        subject[:always_send_emails] = '1'
+      end
+
+      it 'updates value with a type-cast' do
+        expect(subject[:always_send_emails]).to be true
+      end
+    end
+  end
+
+  describe '#update' do
+    before do
+      subject.update(always_send_emails: true, default_language: 'fr', default_privacy: nil)
+    end
+
+    it 'updates values' do
+      expect(subject[:always_send_emails]).to be true
+      expect(subject[:default_language]).to eq 'fr'
+    end
+
+    it 'does not set values that are nil' do
+      expect(subject.as_json).to_not include(default_privacy: nil)
+    end
+  end
+
+  describe '#as_json' do
+    let(:json) { { default_language: 'fr' } }
+
+    it 'returns hash' do
+      expect(subject.as_json).to eq json
+    end
+  end
+
+  describe '.keys' do
+    it 'returns an array' do
+      expect(described_class.keys).to be_a Array
+    end
+  end
+
+  describe '.definition_for' do
+    context 'when key is defined' do
+      it 'returns a setting' do
+        expect(described_class.definition_for(:always_send_emails)).to be_a UserSettings::Setting
+      end
+    end
+
+    context 'when key is not defined' do
+      it 'returns nil' do
+        expect(described_class.definition_for(:foo)).to be_nil
+      end
+    end
+  end
+
+  describe '.definition_for?' do
+    context 'when key is defined' do
+      it 'returns true' do
+        expect(described_class.definition_for?(:always_send_emails)).to be true
+      end
+    end
+
+    context 'when key is not defined' do
+      it 'returns false' do
+        expect(described_class.definition_for?(:foo)).to be false
+      end
+    end
+  end
+end