class SkillManifestReconciler(object):
def __init__(self, db, device_manifest, db_manifest):
self.db = db
self.skill_manifest_repo = DeviceSkillRepository(db)
self.skill_repo = SkillRepository(self.db)
self.device_manifest = {sm.skill_gid: sm for sm in device_manifest}
self.db_manifest = {ds.skill_gid: ds for ds in db_manifest}
self.device_manifest_global_ids = {
gid
for gid in self.device_manifest.keys()
}
self.db_manifest_global_ids = {gid for gid in self.db_manifest}
def reconcile(self):
"""Compare the manifest sent by the device to that on the database."""
self._update_skills()
self._remove_skills()
self._add_skills()
def _update_skills(self):
common_global_ids = self.device_manifest_global_ids.intersection(
self.db_manifest_global_ids)
for gid in common_global_ids:
if self.device_manifest[gid] == self.db_manifest[gid]:
self.skill_manifest_repo.update_manifest_skill(
self.device_manifest[gid])
def _remove_skills(self):
skills_to_remove = self.db_manifest_global_ids.difference(
self.device_manifest_global_ids)
for gid in skills_to_remove:
manifest_skill = self.db_manifest[gid]
self.skill_manifest_repo.remove_manifest_skill(manifest_skill)
if manifest_skill.device_id in gid:
self.skill_repo.remove_by_gid(gid)
def _add_skills(self):
skills_to_add = self.device_manifest_global_ids.difference(
self.db_manifest_global_ids)
for gid in skills_to_add:
skill_id = self.skill_repo.ensure_skill_exists(gid)
self.device_manifest[gid].skill_id = skill_id
self.skill_manifest_repo.add_manifest_skill(
self.device_manifest[gid])
def remove_skill(db, skill):
skill_repo = SkillRepository(db)
skill_repo.remove_by_gid(skill_gid=skill.skill_gid)