add State::Discovery.

lib/trailblazer/workflow/state/discovery.rb

@@ -0,0 +1,57 @@
+module Trailblazer
+  module Workflow
+    class State
+      # Find out possible configurations by traveling all routes of a collaboration.
+      #
+      # {states} are lane positions: [activity, suspend] tuples.
+      module Discovery
+        module Present
+          State = Struct.new(:start_position, :lane_states, :state_from_discovery_fixme) do # FIXME: state_from_discovery_fixme is the "runtime Discovery state"
+            # def to_a
+            #   return start_position, lane_states
+            # end
+          end
+        end
+
+        def self.generate_from(states)
+          rows = states.collect do |state|
+
+            lane_positions, start_position = state # DISCUSS: introduce a Discovery::State object?
+
+            # triggered_catch_event_id = Trailblazer::Activity::Introspect.Nodes(start_position.activity, task: start_position.task).id
+
+            # Go through each lane.
+            row = lane_positions.flat_map do |activity, suspend|
+              next if suspend.to_h["resumes"].nil?
+
+              resumes = suspend.to_h["resumes"].collect do |catch_event_id|
+                catch_event = Trailblazer::Activity::Introspect.Nodes(activity, id: catch_event_id).task
+                # task_after_catch = activity.to_h[:circuit].to_h[:map][catch_event][Trailblazer::Activity::Right]
+                # # raise task_after_catch.inspect
+
+                # Trailblazer::Activity::Introspect.Nodes(activity, task: task_after_catch).data[:label] || task_after_catch
+              end
+
+              # [
+              #   lanes[activity],
+              #   resumes.inspect,
+
+              #   "#{lanes[activity]} suspend",
+              #   suspend.to_h[:semantic][1],
+              # ]
+
+              {
+                activity: activity,
+                suspend: suspend,
+                resumes: resumes,
+              }
+            end
+
+            Present::State.new(start_position, row, state)
+          end
+
+        end
+      end # Discovery
+    end
+  end
+end