add mask size

lib/submissions/generate_audit_trail.rb

@@ -359,14 +359,13 @@ module Submissions
                 value = TimeUtils.format_date_string(value, field.dig('preferences', 'format'), account.locale)
               end
 
-              if field['type'] == 'number'
-                value = NumberUtils.format_number(value,
-                                                  field.dig('preferences', 'format'))
-              end
+              value = NumberUtils.format_number(value, field.dig('preferences', 'format')) if field['type'] == 'number'
 
               value = value.join(', ') if value.is_a?(Array)
 
-              value = TextUtils.mask_value(value) if field.dig('preferences', 'mask').present?
+              if (mask = field.dig('preferences', 'mask').presence)
+                value = TextUtils.mask_value(value, mask)
+              end
 
               composer.formatted_text_box([{ text: TextUtils.maybe_rtl_reverse(value.to_s.presence || 'n/a') }],
                                           text_align: value.to_s.match?(RTL_REGEXP) ? :right : :left,

lib/submissions/generate_result_attachments.rb

@@ -391,7 +391,9 @@ module Submissions
           when ->(type) { type == 'cells' && !area['cell_w'].to_f.zero? }
             cell_width = area['cell_w'] * width
 
-            value = TextUtils.mask_value(value) if field.dig('preferences', 'mask').present?
+            if (mask = field.dig('preferences', 'mask').presence)
+              value = TextUtils.mask_value(value, mask)
+            end
 
             chars = TextUtils.maybe_rtl_reverse(value).chars
             chars = chars.reverse if field.dig('preferences', 'align') == 'right'
@@ -442,7 +444,9 @@ module Submissions
 
             value = TextUtils.maybe_rtl_reverse(Array.wrap(value).join(', '))
 
-            value = TextUtils.mask_value(value) if field.dig('preferences', 'mask').present?
+            if (mask = field.dig('preferences', 'mask').presence)
+              value = TextUtils.mask_value(value, mask)
+            end
 
             text_params = { font:, fill_color:, font_size: }
             text_params[:line_height] = text_params[:font_size] * 1.6 if font_name == COURIER_FONT

lib/text_utils.rb

@@ -15,8 +15,22 @@ module TextUtils
     false
   end
 
-  def mask_value(text)
-    text.to_s.gsub(MASK_REGEXP, MASK_SYMBOL)
+  def mask_value(text, unmask_size = 0)
+    if unmask_size.is_a?(Numeric) && !unmask_size.zero?
+      if unmask_size.negative?
+        [
+          text.first(text.length + unmask_size).gsub(MASK_REGEXP, MASK_SYMBOL),
+          text.last(-unmask_size)
+        ].join
+      elsif unmask_size.positive?
+        [
+          text.first(unmask_size),
+          text.last(text.length - unmask_size).gsub(MASK_REGEXP, MASK_SYMBOL)
+        ].join
+      end
+    else
+      text.to_s.gsub(MASK_REGEXP, MASK_SYMBOL)
+    end
   end
 
   def maybe_rtl_reverse(text)