sc-16854 Handle missing data in Drug Stocks page (#5708)

**Story card:**
[sc-16854](https://app.shortcut.com/simpledotorg/story/16854/fix-drug-stocks-page-crash-due-to-missing-data)

Author: Gyan-Gupta-Rtsl

app/helpers/drug_stock_helper.rb

@@ -35,48 +35,54 @@ def aggregate_state_totals(districts, drugs_by_category, state = nil)
     patient_days = Hash.new(0)
     patient_count = 0
 
-    districts.each do |_, data|
-      report = data[:report]
+    districts&.each do |_, data|
+      report = data&.[](:report)
+      next unless report
+
       patient_count += patient_count_for(report)
 
-      drugs_by_category.each do |drug_category, drugs|
-        drugs.each do |drug|
-          totals[drug.rxnorm_code] += drug_stock_for(report, drug)
+      drugs_by_category&.each do |_, drugs|
+        drugs&.each do |drug|
+          code = drug&.rxnorm_code&.to_s
+          totals[code] += drug_stock_for(report, drug) if code
         end
       end
     end
 
     patient_days_report = {}
-    drugs_by_category.each do |drug_category, drugs|
-      state_coeffs = state ? Reports::DrugStockCalculation.new(
+
+    drugs_by_category&.each do |drug_category, drugs|
+      state_coeffs = (state && Reports::DrugStockCalculation.new(
         state: state,
         protocol_drugs: drugs,
         drug_category: drug_category,
-        current_drug_stocks: districts.map { |_, d| d[:report][:drugs] }.flatten,
+        current_drug_stocks: districts&.map { |_, d| d&.[](:report)&.[](:drugs) }&.flatten || [],
         patient_count: patient_count
-      ).patient_days_coefficients(state) : {}
+      ).patient_days_coefficients(state)) || {}
 
-      load_coefficient = state_coeffs[:load_coefficient] || 1
-      new_patient_coefficient = state_coeffs.dig(:drug_categories, drug_category, :new_patient_coefficient) || 1
+      load_coefficient = state_coeffs&.[]("load_coefficient") || 1
+      new_patient_coefficient = state_coeffs&.dig("drug_categories", drug_category.to_s, "new_patient_coefficient") || 1
 
-      adjusted_stock_sum = drugs.sum do |drug|
-        coefficient = state_coeffs.dig(:drug_categories, drug_category, drug.rxnorm_code) || 1
-        totals[drug.rxnorm_code].to_f * coefficient
-      end
+      adjusted_stock_sum = drugs&.sum do |drug|
+        code = drug&.rxnorm_code&.to_s
+        coeff = state_coeffs&.dig("drug_categories", drug_category.to_s, code) || 1
+        totals[code].to_f * coeff
+      end || 0
 
       patient_days[drug_category] = if patient_count.positive?
         (adjusted_stock_sum / (patient_count * load_coefficient * new_patient_coefficient)).to_i
       else
         0
       end
 
-      stocks = drugs.map do |drug|
+      stocks = drugs&.map do |drug|
+        code = drug&.rxnorm_code&.to_s
         {
           protocol_drug: drug,
-          in_stock: totals[drug.rxnorm_code].to_i,
-          coefficient: state_coeffs.dig(:drug_categories, drug_category, drug.rxnorm_code) || 1
+          in_stock: totals[code].to_i,
+          coefficient: state_coeffs&.dig("drug_categories", drug_category.to_s, code) || 1
         }
-      end
+      end || []
 
       patient_days_report[drug_category] = {
         stocks_on_hand: stocks,

app/views/my_facilities/drug_stocks/_all_district_drug_stock_table.html.erb

@@ -109,7 +109,7 @@
                   data-html="true"
                   data-toggle="tooltip"
                   data-placement="top"
-                  data-trigger="hover focus"
+                  data-trigger="hover focus click"
                   data-template="<%= render 'wide_tooltip_template' %>"
                   data-original-title="<%= render 'drug_stocks_tooltip', report: state_data[:patient_days_report][drug_category] %>"
                   data-sort-value="<%= state_patient_days[drug_category] %>">