Adding validation models

Initial commit to add PrometheusDashboard object

app/models/performance_monitoring/prometheus_dashboard.rb

+# frozen_string_literal: true
+
+module PerformanceMonitoring
+  class PrometheusDashboard
+    include ActiveModel::Model
+
+    attr_accessor :dashboard, :panel_groups
+
+    validates :dashboard, presence: true
+    validates :panel_groups, presence: true
+
+    def self.from_json(json_content)
+      dashboard = new(
+        dashboard: json_content['dashboard'],
+        panel_groups: json_content['panel_groups'].map { |group| PrometheusPanelGroup.from_json(group) }
+      )
+
+      dashboard.tap(&:validate!)
+    end
+
+    def to_yaml
+      self.as_json(only: valid_attributes).to_yaml
+    end
+
+    private
+
+    def valid_attributes
+      %w(panel_groups panels metrics group priority type title y_label weight id unit label query query_range dashboard)
+    end
+  end
+end

app/models/performance_monitoring/prometheus_metric.rb

+# frozen_string_literal: true
+
+module PerformanceMonitoring
+  class PrometheusMetric
+    include ActiveModel::Model
+
+    attr_accessor :id, :unit, :label, :query, :query_range
+
+    validates :unit, presence: true
+    validates :query, presence: true, unless: :query_range
+    validates :query_range, presence: true, unless: :query
+
+    def self.from_json(json_content)
+      metric = PrometheusMetric.new(
+        id: json_content['id'],
+        unit: json_content['unit'],
+        label: json_content['label'],
+        query: json_content['query'],
+        query_range: json_content['query_range']
+      )
+
+      metric.tap(&:validate!)
+    end
+  end
+end

app/models/performance_monitoring/prometheus_panel.rb

+# frozen_string_literal: true
+
+module PerformanceMonitoring
+  class PrometheusPanel
+    include ActiveModel::Model
+
+    attr_accessor :type, :title, :y_label, :weight, :metrics
+
+    validates :title, presence: true
+    validates :metrics, presence: true
+
+    def self.from_json(json_content)
+      panel = new(
+        type: json_content['type'],
+        title: json_content['title'],
+        y_label: json_content['y_label'],
+        weight: json_content['weight'],
+        metrics: json_content['metrics'].map { |metric| PrometheusMetric.from_json(metric) }
+      )
+
+      panel.tap(&:validate!)
+    end
+  end
+end

app/models/performance_monitoring/prometheus_panel_group.rb

+# frozen_string_literal: true
+
+module PerformanceMonitoring
+  class PrometheusPanelGroup
+    include ActiveModel::Model
+
+    attr_accessor :group, :priority, :panels
+
+    validates :group, presence: true
+    validates :panels, presence: true
+
+    def self.from_json(json_content)
+      panel_group = new(
+        group: json_content['group'],
+        priority: json_content['priority'],
+        panels: json_content['panels'].map { |panel| PrometheusPanel.from_json(panel) }
+      )
+
+      panel_group.tap(&:validate!)
+    end
+  end
+end

changelogs/unreleased/custom-dashboard-validation.yml

+---
+title: Add validation for custom PrometheusDashboard
+merge_request: 22893
+author:
+type: added

ee/spec/models/performance_monitoring/prometheus_dashboard_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe PerformanceMonitoring::PrometheusDashboard do
+  let(:json_content) do
+    {
+      "dashboard" => "Dashboard Title",
+      "panel_groups" => [{
+        "group" => "Group Title",
+        "panels" => [{
+          "type" => "area-chart",
+          "title" => "Chart Title",
+          "y_label" => "Y-Axis",
+          "metrics" => [{
+            "id" => "metric_of_ages",
+            "unit" => "count",
+            "label" => "Metric of Ages",
+            "query_range" => "http_requests_total"
+          }]
+        }]
+      }]
+    }
+  end
+
+  describe '.from_json' do
+    subject { described_class.from_json(json_content) }
+
+    it 'creates a PrometheusDashboard object' do
+      expect(subject).to be_a PerformanceMonitoring::PrometheusDashboard
+      expect(subject.dashboard).to eq(json_content['dashboard'])
+      expect(subject.panel_groups).to all(be_a PerformanceMonitoring::PrometheusPanelGroup)
+    end
+
+    describe 'validations' do
+      context 'when dashboard is missing' do
+        before do
+          json_content['dashboard'] = nil
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
+      end
+
+      context 'when panel groups are missing' do
+        before do
+          json_content['panel_groups'] = []
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
+      end
+    end
+  end
+
+  describe '#to_yaml' do
+    let(:expected_yaml) do
+      "---\npanel_groups:\n- panels:\n  - metrics:\n    - id: metric_of_ages\n      unit: count\n      label: Metric of Ages\n      query: \n      query_range: http_requests_total\n    type: area-chart\n    title: Chart Title\n    y_label: Y-Axis\n    weight: \n  group: Group Title\n  priority: \ndashboard: Dashboard Title\n"
+    end
+
+    let(:prometheus_dashboard) { described_class.from_json(json_content) }
+
+    let(:subject) { prometheus_dashboard.to_yaml }
+
+    it { is_expected.to eq(expected_yaml) }
+  end
+end

ee/spec/models/performance_monitoring/prometheus_metric_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe PerformanceMonitoring::PrometheusMetric do
+  let(:json_content) do
+    {
+      "id" => "metric_of_ages",
+      "unit" => "count",
+      "label" => "Metric of Ages",
+      "query_range" => "http_requests_total"
+    }
+  end
+
+  describe '.from_json' do
+    subject { described_class.from_json(json_content) }
+
+    it 'creates a PrometheusMetric object' do
+      expect(subject).to be_a PerformanceMonitoring::PrometheusMetric
+      expect(subject.id).to eq(json_content['id'])
+      expect(subject.unit).to eq(json_content['unit'])
+      expect(subject.label).to eq(json_content['label'])
+      expect(subject.query_range).to eq(json_content['query_range'])
+    end
+
+    describe 'validations' do
+      context 'when unit is missing' do
+        before do
+          json_content['unit'] = nil
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
+      end
+
+      context 'when query and query_range is missing' do
+        before do
+          json_content['query_range'] = nil
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
+      end
+
+      context 'when query_range is missing but query is available' do
+        before do
+          json_content['query_range'] = nil
+          json_content['query'] = 'http_requests_total'
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { is_expected.to be_valid }
+      end
+    end
+  end
+end

ee/spec/models/performance_monitoring/prometheus_panel_group_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe PerformanceMonitoring::PrometheusPanelGroup do
+  let(:json_content) do
+    {
+      "group" => "Group Title",
+      "panels" => [{
+        "type" => "area-chart",
+        "title" => "Chart Title",
+        "y_label" => "Y-Axis",
+        "metrics" => [{
+          "id" => "metric_of_ages",
+          "unit" => "count",
+          "label" => "Metric of Ages",
+          "query_range" => "http_requests_total"
+        }]
+      }]
+    }
+  end
+
+  describe '.from_json' do
+    subject { described_class.from_json(json_content) }
+
+    it 'creates a PrometheusPanelGroup object' do
+      expect(subject).to be_a PerformanceMonitoring::PrometheusPanelGroup
+      expect(subject.group).to eq(json_content['group'])
+      expect(subject.panels).to all(be_a PerformanceMonitoring::PrometheusPanel)
+    end
+
+    describe 'validations' do
+      context 'when group is missing' do
+        before do
+          json_content['group'] = nil
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
+      end
+
+      context 'when panels are missing' do
+        before do
+          json_content['panels'] = []
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
+      end
+    end
+  end
+end

ee/spec/models/performance_monitoring/prometheus_panel_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe PerformanceMonitoring::PrometheusPanel do
+  let(:json_content) do
+    {
+      "type" => "area-chart",
+      "title" => "Chart Title",
+      "y_label" => "Y-Axis",
+      "weight" => 1,
+      "metrics" => [{
+        "id" => "metric_of_ages",
+        "unit" => "count",
+        "label" => "Metric of Ages",
+        "query_range" => "http_requests_total"
+      }]
+    }
+  end
+
+  describe '.from_json' do
+    subject { described_class.from_json(json_content) }
+
+    it 'creates a PrometheusPanelGroup object' do
+      expect(subject).to be_a PerformanceMonitoring::PrometheusPanel
+      expect(subject.type).to eq(json_content['type'])
+      expect(subject.title).to eq(json_content['title'])
+      expect(subject.y_label).to eq(json_content['y_label'])
+      expect(subject.weight).to eq(json_content['weight'])
+      expect(subject.metrics).to all(be_a PerformanceMonitoring::PrometheusMetric)
+    end
+
+    describe 'validations' do
+      context 'when title is missing' do
+        before do
+          json_content['title'] = nil
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
+      end
+
+      context 'when metrics are missing' do
+        before do
+          json_content['metrics'] = []
+        end
+
+        subject { described_class.from_json(json_content) }
+
+        it { expect { subject }.to raise_error(ActiveModel::ValidationError) }
+      end
+    end
+  end
+end