Stub HardwareInformation (hardware survey) class, added LegacyManifest and LegacyManifastPackage handling classes

lib/worker/api/legacy_manifest_package.rb

@@ -0,0 +1,67 @@
+require "json"
+require "digest/sha2"
+
+module W3DHubBackend
+  class Worker
+    class Api
+      class LegacyManifestPackage
+        attr_reader :category, :subcategory, :version, :name, :error, :file_size,
+                    :checksum_chunk_size, :sha256_checksum, :checksum_chunks
+
+        def initialize(hash)
+          @category = hash["category"]
+          @subcategory = hash["subcategory"]
+          @version = Gem::Version.new(hash["version"] || "0.0.0.0")
+          @name = hash["name"]
+          @error = hash["error"]
+          @file_size = Integer(hash["size"] || 0)
+          @checksum_chunk_size = Integer(hash["checksum-size"] || 0)
+          @sha256_checksum = hash["checksum"]
+          @checksum_chunks = hash["checksum-chunks"]
+        end
+
+        def error?
+          @error
+        end
+
+        # checksum whole file and file chunks until a mismatch occurs or the whole file is verified.
+        def verify_file(filename)
+          file_size = File.size(filename)
+
+          checksum_chunks = {}
+          overall_checksum = ""
+          overall_digest = Digest::SHA256.new
+          chunk_digest = Digest::SHA256.new
+
+          File.open(filename, "rb") do |f|
+            f.pos = 0
+            offset = 0
+
+            while (chunk = f.read(@checksum_chunk_size))
+
+              overall_digest << chunk
+
+              checksum_chunks[offset] = chunk_digest.update(chunk).hexdigest.upcase
+
+              offset += @checksum_chunk_size
+              chunk_digest.reset
+            end
+          end
+
+          overall_checksum = overall_digest.hexdigest.upcase
+
+          # FIXME: Make this a nice Data struct object
+          [overall_checksum, checksum_chunks, file_size]
+        end
+      end
+    end
+
+    def package_cache_filename(category, subcategory)
+      if subcategory.empty?
+        category
+      else
+        "#{category}-#{subcategory}"
+      end
+    end
+  end
+end