[#70333] Support WebP images in PDF exports

https://community.openproject.org/work_packages/70333

app/models/exports/pdf/common/attachments.rb

@@ -42,7 +42,7 @@ module Exports::PDF::Common::Attachments
   end
 
   def pdf_embeddable?(content_type)
-    %w[image/jpeg image/png image/gif].include?(content_type)
+    %w[image/jpeg image/png image/gif image/webp].include?(content_type)
   end
 
   def delete_all_resized_images
@@ -67,6 +67,7 @@ module Exports::PDF::Common::Attachments
 
     filename = local_file.path
     filename = convert_gif_to_png(filename) if attachment.content_type == "image/gif"
+    filename = convert_webp_to_png(filename) if attachment.content_type == "image/webp"
 
     resize_image(filename)
   end
@@ -86,6 +87,15 @@ module Exports::PDF::Common::Attachments
     tmp_file
   end
 
+  def convert_webp_to_png(filename)
+    tmp_file = temp_image_file(".png")
+
+    image = MiniMagick::Image.open(filename)
+    image.format("png")
+    image.write(tmp_file)
+    tmp_file
+  end
+
   def attachment_by_api_content_src(src)
     return nil if src.empty?
 

spec/models/work_packages/pdf_export/work_package_to_pdf_spec.rb

@@ -376,6 +376,28 @@ RSpec.describe WorkPackage::PDFExport::WorkPackageToPdf do
         expect(exporter.send(:pdf_embeddable?, "image/png")).to be true
         expect(exporter.send(:pdf_embeddable?, "image/jpeg")).to be true
         expect(exporter.send(:pdf_embeddable?, "image/gif")).to be true
+        expect(exporter.send(:pdf_embeddable?, "image/webp")).to be true
+      end
+    end
+
+    describe "with WebP image attachment" do
+      let(:webp_path) { Rails.root.join("spec/fixtures/files/image.webp") }
+      let(:webp_attachment) { Attachment.new author: user, file: File.open(webp_path) }
+      let(:attachments) { [webp_attachment] }
+      let(:description) do
+        <<~DESCRIPTION
+          This work package contains a WebP image.
+          ![](/api/v3/attachments/#{webp_attachment.id}/content)
+        DESCRIPTION
+      end
+
+      before do
+        webp_attachment.save
+      end
+
+      it "converts WebP images and includes them in the PDF export" do
+        expect(webp_attachment.content_type).to eq "image/webp"
+        expect(pdf[:images].length).to eq(1)
       end
     end