1 files changed, 155 insertions, 0 deletions
diff --git a/app/models/merge.rb b/app/models/merge.rb
new file mode 100644
index 000000000..e87f83402
--- /dev/null
+++ b/app/models/merge.rb
@@ -0,0 +1,155 @@
+class Merge < ActiveRecord::Base
+  extend Enumerize
+
+  belongs_to :workbench
+  enumerize :status, in: %w[new pending successful failed running]
+
+  has_array_of :referentials, class_name: 'Referential'
+
+  delegate :output, to: :workbench
+
+  attr_reader :new
+
+  def merge!
+    update started_at: Time.now, status: :running
+
+    prepare_new
+
+    referentials.each do |referential|
+      merge_referential referential
+    end
+
+    save_current
+  ensure
+    update ended_at: Time.now, status: :successful
+  end
+
+  def prepare_new
+    new =
+      if workbench.output.current
+        Rails.logger.debug "Clone current output"
+        Referential.new_from(workbench.output.current, fixme_functional_scope).tap do |clone|
+          clone.inline_clone = true
+        end
+      else
+        Rails.logger.debug "Create a new output"
+        # 'empty' one
+        attributes = {
+          organisation: workbench.organisation, # TODO could be workbench.organisation by default
+          name: I18n.t("merges.referential_name"),
+          slug: "output_#{workbench.id}_#{Time.now.to_i}"
+        }
+        workbench.referentials.new attributes
+      end
+
+    new.save!
+
+    output.update new: new
+    @new = new
+  end
+
+  def merge_referential(referential)
+    Rails.logger.debug "Merge #{referential.slug}"
+    puts referential.metadatas.inspect
+
+    metadata_merger = MetadatasMerger.new new.metadatas, referential.metadatas
+    metadata_merger.merge
+
+    metadata_merger.conflits.each do |line_id, periods|
+      # clean new on given period
+    end
+    metadata_merger.destroyed_metadatas.each(&:destroy)
+
+    # let's merge data :)
+  end
+
+  def save_current
+    output.update current: new, new: nil
+    output.current.update referential_suite: output
+  end
+
+  def fixme_functional_scope
+    if attribute = workbench.organisation.sso_attributes.try(:[], "functional_scope")
+      JSON.parse(attribute)
+    end
+  end
+
+  def child_change
+
+  end
+
+  class MetadatasMerger
+
+    attr_reader :merge, :metadatas
+    def initialize(merge, metadatas)
+      @merge, @metadatas = merge, metadatas
+    end
+
+    def merge
+      metadatas.each do |metadata|
+        merge_one metadata
+      end
+    end
+
+    def line_metadatas(line_id)
+      merge.select do |m|
+        m.line_ids.include? line_id
+      end
+    end
+
+    def conflits
+      @conflits ||= Hash.new { |h,k| h[k] = [] }
+    end
+
+    def destroyed_metadatas
+      @destroyed_metadatas ||= []
+    end
+
+    def merge_one(metadata)
+      metadata.line_ids.each do |line_id|
+        line_metadatas = line_metadatas(line_id)
+
+        metadata.periodes do |period|
+          before = line_metadatas.find do |m|
+            m.periodes.any? { |p| p.include? period.begin }
+          end
+
+          if before
+            before.end = period.begin - 1
+          end
+
+          between = line_metadatas.select do |m|
+            m.periodes.any? do |p|
+              period.begin < p.begin && p.end < period.end
+            end
+          end
+
+          destroyed_metadatas.concat between
+
+          after = line_metadatas.find do |m|
+            m.periodes.any? { |p| p.include? period.end }
+          end
+
+          if after
+            after.begin = period.end + 1
+          end
+
+          if [before, between, after].any?(&:present?)
+            conflits[line_id] << period
+
+            attributes = {
+              line_ids: line_id,
+              periodes: [period],
+              referential_source_id: metadata.referential_source_id,
+              created_at: metadata.created_at
+            }
+            # line_metadatas should not contain conflicted metadatas
+            metadatas << ReferentialMetadata.new(attributes)
+          end
+        end
+      end
+    end
+
+  end
+
+end