Update help text and add dynamic example text

- Display help text and example text according to
  remote census configuration:

  Examples with expecte results:
  * With remote census without :date_of_birth and :postal_code:
    -> "To verify a user, your application needs: Document number"
    -> "Required fields for each user must be separated by commas and
        each user must be separated by semicolons."
    -> "Example: 12345678Z; 87654321Y"

  * With remote census with :date_of_birth required:
    -> "To verify a user, your application needs: Document number,
        Day of birth (dd/mm/yyyy)"
    -> "Required fields for each user must be separated by commas and
        each user must be separated by semicolons."
    -> "Example: 12345678Z, 01/01/1980; 87654321Y, 01/02/1990"

  * With remote census with :date_of_birth and :postal_code required:
    -> "To verify a user, your application needs: Document number,
        Day of birth (dd/mm/yyyy) and Postal Code"
    -> "Required fields for each user must be separated by commas and
        each user must be separated by semicolons."
    -> "Example: 12345678Z, 01/01/1980, 28001; 87654321Y, 01/02/1990, 28002"

app/helpers/signature_sheets_helper.rb

@@ -5,4 +5,48 @@ module SignatureSheetsHelper
      [t("activerecord.models.budget/investment", count: 1), Budget::Investment]]
   end
 
-end
+  def required_fields_to_verify_text_help
+    if Setting["feature.remote_census"].present?
+      date_of_birth_and_postal_code_text_help
+    else
+      t("admin.signature_sheets.new.document_numbers_note")
+    end
+  end
+
+  def date_of_birth_and_postal_code_text_help
+    text_help = t("admin.signature_sheets.new.text_help.required_fields_note")
+
+    if Setting.force_presence_date_of_birth?
+      text_help += t("admin.signature_sheets.new.text_help.date_of_birth_note")
+    end
+
+    if Setting.force_presence_postal_code?
+      text_help += t("admin.signature_sheets.new.text_help.postal_code_note")
+    end
+
+    text_help += "<br/>"
+    text_help += t("admin.signature_sheets.new.text_help.required_fields_structure_note")
+
+    return text_help.html_safe
+  end
+
+  def example_text_help
+    text_example = t("admin.signature_sheets.new.text_help.example_text")
+    example_1 = "12345678Z"
+    example_2 = "87654321Y"
+
+    if Setting.force_presence_date_of_birth?
+      example_1 += ", 01/01/1980"
+      example_2 += ", 01/02/1990"
+    end
+
+    if Setting.force_presence_postal_code?
+      example_1 += ", 28001"
+      example_2 += ", 28002"
+    end
+
+    text_example += "#{example_1}; #{example_2}"
+    return text_example
+  end
+
+end

app/views/admin/signature_sheets/new.html.erb

@@ -15,7 +15,8 @@
   </div>
 
   <%= f.label :required_fields_to_verify %>
-  <p class="help-text" id="required-fields-to-verify-help-text"><%= t("admin.signature_sheets.new.document_numbers_note") %></p>
+  <p class="help-text" id="required-fields-to-verify-help-text"><%= required_fields_to_verify_text_help %></p>
+  <p class="help-text"> <%= example_text_help %></p>
   <%= f.text_area :required_fields_to_verify, rows: "6", label: false, aria: {describedby: "required-fields-to-verify-help-text"} %>
 
   <%= f.submit(class: "button", value: t("admin.signature_sheets.new.submit")) %>