Refactor micropub specific things out to a slice

slices/micropub/commands/media/upload.rb

@@ -0,0 +1,103 @@
+# frozen_string_literal: true
+
+require "securerandom"
+require "dry/monads"
+require "filemagic"
+require "image_processing/vips"
+require "open3"
+
+module Micropub
+  module Commands
+    module Media
+      class Upload < Adamantium::Command
+        include Deps["settings"]
+        include Dry::Monads[:result]
+
+        IMAGE_TYPES = %i[jpeg jpg png].freeze
+        VIDEO_TYPES = %i[gif iso].freeze
+        VALID_UPLOAD_TYPES = IMAGE_TYPES + VIDEO_TYPES
+
+        def call(file:)
+          mime = FileMagic.new
+          type = mime.file(file[:tempfile].path, true).to_sym
+
+          return Failure(:invalid_file_type) unless VALID_UPLOAD_TYPES.include? type
+
+          result = save_image(file: file) if IMAGE_TYPES.include? type
+          result = save_video(file: file, type: type) if VIDEO_TYPES.include? type
+
+          if result.success?
+            Success(result.value!)
+          else
+            Failure()
+          end
+        end
+
+        private
+
+        def pathname
+          Time.now.strftime("%m-%Y")
+        end
+
+        def uuid
+          SecureRandom.uuid
+        end
+
+        def save_video(file:, type:)
+          fullsize_filename = "#{uuid}.mp4"
+
+          dirname = File.join("public", "media", pathname)
+
+          unless File.directory?(dirname)
+            FileUtils.mkdir_p(dirname)
+          end
+
+          begin
+            case type
+            when :gif
+              Open3.popen3("ffmpeg -i #{file[:tempfile].path} -movflags faststart -pix_fmt yuv420p -vf 'scale=trunc(iw/2)*2:trunc(ih/2)*2' #{File.join(dirname, fullsize_filename)}")
+            when :iso
+              Open3.popen3("ffmpeg -i #{file[:tempfile].path} -vcodec libx264 -crf 28 #{File.join(dirname, fullsize_filename)}")
+            end
+          rescue Errno::ENOENT, NoMethodError => e
+            return Failure(e.message)
+          end
+
+          upload_path = File.join(settings.micropub_site_url, "/media/", "/#{pathname}/", fullsize_filename).to_s
+          Success(upload_path)
+        end
+
+        def save_image(file:)
+          fullsize_filename = "#{uuid}#{File.extname(file[:filename])}"
+          thumbnail_filename = "#{uuid}-small#{File.extname(file[:filename])}"
+
+          dirname = File.join("public", "media", pathname)
+
+          fullsize_pipeline = ImageProcessing::Vips.source(file[:tempfile])
+            .resize_to_limit(1024, nil)
+            .saver(quality: 100)
+            .call(save: false)
+
+          thumbnail_pipeline = ImageProcessing::Vips.source(file[:tempfile])
+            .resize_to_limit(300, 300, crop: :attention)
+            .saver(quality: 100)
+            .call(save: false)
+
+          unless File.directory?(dirname)
+            FileUtils.mkdir_p(dirname)
+          end
+
+          begin
+            fullsize_pipeline.write_to_file(File.join(dirname, fullsize_filename))
+            thumbnail_pipeline.write_to_file(File.join(dirname, thumbnail_filename))
+          rescue Errno::ENOENT, NoMethodError => e
+            return Failure(e.message)
+          end
+
+          upload_path = File.join(settings.micropub_site_url, "/media/", "/#{pathname}/", fullsize_filename).to_s
+          Success(upload_path)
+        end
+      end
+    end
+  end
+end