feat: add esp counts when calculating teacher participation rates on overview page

app/services/esp_loader.rb

@@ -0,0 +1,49 @@
+require "csv"
+
+class EspLoader
+  def self.load_data(filepath:)
+    respondents = []
+    CSV.parse(File.read(filepath), headers: true) do |row|
+      row = EspRowValues.new(row:)
+      next unless row.school.present? && row.academic_years.size.positive?
+
+      respondents.concat(create_esp_entry(row:))
+    end
+
+    Respondent.import respondents, batch_size: 1000, on_duplicate_key_update: [:total_esp]
+  end
+
+  def self.create_esp_entry(row:)
+    row.academic_years.map do |academic_year|
+      respondent = Respondent.find_or_initialize_by(school: row.school, academic_year:)
+      respondent.total_esp = row.total_esp
+      respondent
+    end
+  end
+end
+
+class EspRowValues
+  attr_reader :row
+
+  def initialize(row:)
+    @row = row
+  end
+
+  def school
+    @school ||= begin
+      dese_id = row["DESE ID"]&.strip.to_i
+      School.find_by_dese_id(dese_id)
+    end
+  end
+
+  def academic_years
+    @academic_year ||= begin
+      year = row["Academic Year"]&.strip
+      AcademicYear.of_year(year)
+    end
+  end
+
+  def total_esp
+    row["School Totals"]&.strip&.gsub(",", "").to_i
+  end
+end