Initial version of chart preview tool

app/controllers/admin/chart_previews_controller.rb

@@ -0,0 +1,50 @@
+require 'dashboard'
+
+module Admin
+  class ChartPreviewsController < AdminController
+    before_action :set_school
+    before_action :load_chart_list
+    before_action :set_chart_type
+    before_action :set_chart_titles
+    before_action :set_controls
+
+    def index
+      @schools = School.data_enabled.by_name
+    end
+
+    private
+
+    def set_school
+      return nil unless chart_params[:school_id].present?
+      @preview_school = School.friendly.find(chart_params[:school_id])
+    end
+
+    def set_chart_type
+      return nil unless chart_params[:chart_type].present?
+      @chart_type = chart_params[:chart_type].to_sym
+    end
+
+    def set_chart_titles
+      @title = chart_params[:title] || @preview_school.present? ? "School: #{@preview_school.name}" : ''
+      @subtitle = chart_params[:subtitle] || @chart_type.present? ? "Chart: #{@chart_type}" : ''
+      @footer = chart_params[:footer]
+    end
+
+    def set_controls
+      @axis_controls = (chart_params[:axis_controls].nil? || chart_params[:axis_controls] == '1')
+      @analysis_controls = (chart_params[:analysis_controls].nil? || chart_params[:analysis_controls] == '1')
+    end
+
+    def chart_params
+      params[:preview_chart] || {}
+    end
+
+    def load_chart_list
+      analysis_charts = DashboardConfiguration::DASHBOARD_PAGE_GROUPS.except(:simulator, :simulator_detail, :simulator_debug, :test, :pupil_analysis_page, :heating_model_fitting, :cost_unused).map do |top_level_key, config|
+        ["#{config[:name]} (#{top_level_key})", config.fetch(:charts) {[]}]
+      end
+      custom_activity_charts = [['Activity charts (custom)', ChartManager::STANDARD_CHART_CONFIGURATION.keys.grep(/^activities/)]]
+      @chart_list = custom_activity_charts + analysis_charts
+    end
+  end
+end

app/views/admin/chart_previews/index.html.erb

@@ -0,0 +1,65 @@
+<h1>Chart Previews</h1>
+
+<p>
+This page is intended to help with interactive testing and debugging of chart configurations. Using the options below you can select a school and
+run a specific chart using their data.
+</p>
+
+<%= simple_form_for :preview_chart, url: admin_chart_previews_path, method: "GET", html: { class: 'form' } do |f| %>
+  <%= f.input :school_id,
+    collection: @schools,
+    label: 'Choose school',
+    label_method: lambda {|k| k.name },
+    include_blank: false,
+    selected: ( params[:preview_chart].present? ? params[:preview_chart]['school_id'] : nil ),
+    input_html: { class: 'form-control select2' }
+  %>
+
+  <%= f.input :chart_type,
+    as: :grouped_select,
+    collection: @chart_list,
+    label: 'Choose chart type',
+    group_method: :last,
+    group_label_method: :first,
+    include_blank: false,
+    selected: ( params[:preview_chart].present? ? params[:preview_chart]["chart_type"] : nil),
+    input_html: { class: 'form-control select2'}
+  %>
+
+  <p>
+  You can optionally provide a title, subtitle and footer for the chart to see
+  how the chart will look when embedded into a page with other text around it.
+  </p>
+
+  <%= f.input :title, as: :string, input_html: {value: @title || ''} %>
+  <%= f.input :subtitle, as: :string, input_html: {value: @subtitle || ''} %>
+  <%= f.input :footer, as: :string, input_html: {value: @footer || ''} %>
+
+  <p>
+  You can optionally indicate whether the chart should have controls to switch axis and to
+  navigate through the database. However these may be overridden by the chart configuration
+  as some charts do not support navigation or switching axes.
+  </p>
+
+  <%= f.input :axis_controls, as: :boolean, input_html: { :checked => @axis_controls } %>
+  <%= f.input :analysis_controls, as: :boolean,  input_html: { :checked => @analysis_controls } %>
+
+  <%= f.submit "Run chart", class: "btn btn-primary" %>
+  <%= link_to 'Clear', admin_chart_previews_path, class: "btn btn-primary" %>
+<% end %>
+
+<div class="mt-4">
+  <% if @preview_school.present? && @chart_type.present? %>
+    <%= component 'chart', chart_type: @chart_type, axis_controls: @axis_controls, analysis_controls: @analysis_controls, school: @preview_school do |c| %>
+      <% if @title.present? %>
+        <% c.with_title { @title } %>
+      <% end %>
+      <% if @subtitle.present? %>
+        <% c.with_subtitle { @subtitle } %>
+      <% end %>
+      <% if @footer.present? %>
+        <% c.with_footer { @footer } %>
+      <% end %>
+    <% end %>
+  <% end %>
+</div>

config/routes.rb

@@ -479,6 +479,8 @@
       end
     end
 
+    resources :chart_previews
+
     namespace :emails do
       resources :alert_mailers, only: :show
     end