Track dossier operations with author and subject

app/models/dossier_operation_log.rb

@@ -9,6 +9,57 @@ class DossierOperationLog < ApplicationRecord
   }
 
   belongs_to :dossier
-  belongs_to :gestionnaire
-  belongs_to :administration
+  has_one_attached :serialized
+
+  def self.create_and_serialize(params)
+    dossier = params.fetch(:dossier)
+
+    operation_log = new(operation: params.fetch(:operation),
+      dossier_id: dossier.id,
+      keep_until: dossier.procedure.keep_until,
+      executed_at: Time.zone.now,
+      automatic_operation: !!params[:automatic_operation])
+
+    serialized = {
+      operation: operation_log.operation,
+      dossier_id: operation_log.dossier_id,
+      author: self.serialize_author(params[:author]),
+      subject: self.serialize_subject(params[:subject]),
+      automatic_operation: operation_log.automatic_operation?,
+      executed_at: operation_log.executed_at.iso8601
+    }.compact.to_json
+
+    operation_log.digest = Digest::SHA256.hexdigest(serialized)
+
+    operation_log.serialized.attach(
+      io: StringIO.new(serialized),
+      filename: "operation-#{operation_log.digest}.json",
+      content_type: 'application/json',
+      # we don't want to run virus scanner on this file
+      metadata: { virus_scan_result: ActiveStorage::VirusScanner::SAFE }
+    )
+
+    operation_log.save!
+  end
+
+  def self.serialize_author(author)
+    if author.nil?
+      nil
+    else
+      OperationAuthorSerializer.new(author).as_json
+    end
+  end
+
+  def self.serialize_subject(subject)
+    if subject.nil?
+      nil
+    elsif !Flipflop.operation_log_serialize_subject?
+      { id: subject.id }
+    else
+      case subject
+      when Dossier
+        DossierSerializer.new(subject).as_json
+      end
+    end
+  end
 end