fix: pending/paid invoices

lib/invoice.rb

@@ -27,6 +27,17 @@ class Invoice < Sequel::Model(:invoices)
     paid? ? 'paid' : 'pending'
   end
 
+  # Both status variants are pre-rendered at creation; `pdf_key` is the base
+  # path (no suffix). The download route picks a variant by current status.
+  def pdf_key_for(status)
+    base = pdf_key.sub(/\.pdf\z/, '')
+    "#{base}-#{status}.pdf"
+  end
+
+  def current_pdf_key
+    pdf_key_for(status)
+  end
+
   def total
     BigDecimal(subtotal.to_s)
   end

lib/invoice_pdf.rb

@@ -31,12 +31,15 @@ class InvoicePdf
   COLOR_RULE    = 'DADADA'.freeze
   COLOR_ACCENT  = '1A1A1A'.freeze
 
-  def self.render(invoice)
-    new(invoice).render
+  # `status` overrides the status shown in the PDF (e.g. to pre-render a "paid"
+  # copy before any payment date exists). Defaults to the invoice's live status.
+  def self.render(invoice, status: nil)
+    new(invoice, status: status).render
   end
 
-  def initialize(invoice)
+  def initialize(invoice, status: nil)
     @invoice = invoice
+    @status  = status || invoice.status
   end
 
   def render
@@ -155,7 +158,7 @@ class InvoicePdf
       ['ISSUED',   @invoice.issued_on.strftime('%Y-%m-%d')],
       ['DUE',      @invoice.due_on.strftime('%Y-%m-%d')],
       ['CURRENCY', @invoice.currency],
-      ['STATUS',   @invoice.status.upcase]
+      ['STATUS',   @status.upcase]
     ]
     col_w = pdf.bounds.width / cells.size.to_f
     top   = pdf.cursor

lib/s3.rb

@@ -40,6 +40,13 @@ module S3
     key
   end
 
+  def exists?(key)
+    client.head_object(bucket: bucket, key: key)
+    true
+  rescue Aws::S3::Errors::NotFound, Aws::S3::Errors::NoSuchKey
+    false
+  end
+
   def presigned_url(key, expires_in: 300, filename: nil)
     params = { bucket: bucket, key: key }
     if filename