Improves modularity of the code

Adds cleaner and block processor to increase the modularity and reuse of the code

pisa/cleaner.py

@@ -0,0 +1,45 @@
+import pisa.conf as conf
+from pisa import logging
+
+
+class Cleaner:
+    @staticmethod
+    def delete_expired_appointment(block, appointments, locator_uuid_map):
+        to_delete = [uuid for uuid, appointment in appointments.items()
+                     if block["height"] > appointment.end_time + conf.EXPIRY_DELTA]
+
+        for uuid in to_delete:
+            locator = appointments[uuid].locator
+
+            appointments.pop(uuid)
+
+            if len(locator_uuid_map[locator]) == 1:
+                locator_uuid_map.pop(locator)
+
+            else:
+                locator_uuid_map[locator].remove(uuid)
+
+            logging.info("[Cleaner] end time reached with no match! Deleting appointment {} (uuid: {})".format(locator,
+                                                                                                               uuid))
+
+        return appointments, locator_uuid_map
+
+    @staticmethod
+    def delete_completed_jobs(jobs, tx_job_map, completed_jobs, height):
+        for uuid in completed_jobs:
+            logging.info("[Cleaner] job completed (uuid = {}). Appointment ended at block {} after {} confirmations"
+                         .format(uuid, jobs[uuid].justice_txid, height, jobs[uuid].confirmations))
+
+            # ToDo: #9-add-data-persistence
+            justice_txid = jobs[uuid].justice_txid
+            jobs.pop(uuid)
+
+            if len(tx_job_map[justice_txid]) == 1:
+                tx_job_map.pop(justice_txid)
+
+                logging.info("[Cleaner] no more jobs for justice_txid {}".format(justice_txid))
+
+            else:
+                tx_job_map[justice_txid].remove(uuid)
+
+        return jobs, tx_job_map