add pdf/a-3b

lib/docuseal.rb

@@ -88,6 +88,10 @@ module Docuseal
     true
   end
 
+  def pdf_format
+    @pdf_format ||= ENV['PDF_FORMAT'].to_s.downcase
+  end
+
   def trusted_certs
     @trusted_certs ||=
       ENV['TRUSTED_CERTS'].to_s.gsub('\\n', "\n").split("\n\n").map do |base64|

lib/submissions/generate_audit_trail.rb

@@ -81,7 +81,12 @@ module Submissions
         end
 
       composer = HexaPDF::Composer.new(skip_page_creation: true)
-      composer.document.task(:pdfa) if FONT_NAME == 'GoNotoKurrent'
+
+      if Docuseal.pdf_format == 'pdf/a-3b'
+        composer.document.task(:pdfa, level: '3b')
+      elsif FONT_NAME == 'GoNotoKurrent'
+        composer.document.task(:pdfa)
+      end
 
       composer.document.config['font.map'] = {
         'Helvetica' => {

lib/submissions/generate_combined_attachment.rb

@@ -17,6 +17,11 @@ module Submissions
 
       pdf.trailer.info[:Creator] = "#{Docuseal.product_name} (#{Docuseal::PRODUCT_URL})"
 
+      if Docuseal.pdf_format == 'pdf/a-3b'
+        pdf.task(:pdfa, level: '3b')
+        pdf.config['font.map'] = GenerateResultAttachments::PDFA_FONT_MAP
+      end
+
       if pkcs
         sign_params = {
           reason: Submissions::GenerateResultAttachments.single_sign_reason(submitter),

lib/submissions/generate_result_attachments.rb

@@ -30,6 +30,13 @@ module Submissions
       bold_italic: FONT_BOLD_ITALIC_NAME
     }.freeze
 
+    PDFA_FONT_VARIANS = {
+      none: FONT_NAME,
+      bold: FONT_BOLD_NAME,
+      italic: FONT_NAME,
+      bold_italic: FONT_BOLD_NAME
+    }.freeze
+
     SIGN_REASON = 'Signed by %<name>s with DocuSeal.com'
 
     RTL_REGEXP = TextUtils::RTL_REGEXP
@@ -48,6 +55,13 @@ module Submissions
       'Courier' => 1.6
     }.freeze
 
+    PDFA_FONT_MAP = {
+      FONT_NAME => PDFA_FONT_VARIANS,
+      'Helvetica' => PDFA_FONT_VARIANS,
+      'Times' => PDFA_FONT_VARIANS,
+      'Courier' => PDFA_FONT_VARIANS
+    }.freeze
+
     MISSING_GLYPH_REPLACE = {
       '▪' => '-',
       '✔️' => 'V',
@@ -599,6 +613,11 @@ module Submissions
 
       pdf.trailer.info[:Creator] = info_creator
 
+      if Docuseal.pdf_format == 'pdf/a-3b'
+        pdf.task(:pdfa, level: '3b')
+        pdf.config['font.map'] = PDFA_FONT_MAP
+      end
+
       sign_reason = fetch_sign_reason(submitter)
 
       if sign_reason && pkcs