From 1d6ce7179db0bb7bb027914e52c9dbef39b546c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Laura=20Kl=C3=BCnder?= <laura@codingcatgirl.de>
Date: Fri, 16 Jun 2017 20:27:07 +0200
Subject: [PATCH] add simple api to view the current changeset

---
 src/c3nav/editor/api.py    |  7 +++++++
 src/c3nav/editor/models.py | 28 ++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/src/c3nav/editor/api.py b/src/c3nav/editor/api.py
index 3d48766d..a4a3739f 100644
--- a/src/c3nav/editor/api.py
+++ b/src/c3nav/editor/api.py
@@ -15,6 +15,7 @@ class EditorViewSet(ViewSet):
     Editor API
     /geometries/ returns a list of geojson features, you have to specify ?level=<id> or ?space=<id>
     /geometrystyles/ returns styling information for all geometry types
+    /changeset/ returns the current changeset
     """
     def _get_level_geometries(self, level):
         buildings = level.buildings.all()
@@ -153,3 +154,9 @@ class EditorViewSet(ViewSet):
             'point': '#4488cc',
             'shadow': '#000000',
         })
+
+    @list_route(methods=['get'])
+    def changeset(self, request, *args, **kwargs):
+        request.changeset = ChangeSet.get_for_request(request)
+
+        return Response(request.changeset.serialize())
diff --git a/src/c3nav/editor/models.py b/src/c3nav/editor/models.py
index 0bb18184..a457c1a5 100644
--- a/src/c3nav/editor/models.py
+++ b/src/c3nav/editor/models.py
@@ -1,5 +1,6 @@
 import json
 import typing
+from collections import OrderedDict
 
 from django.apps import apps
 from django.conf import settings
@@ -246,6 +247,17 @@ class ChangeSet(models.Model):
     def add_delete(self, obj, author=None):
         return self._new_change(author=author, action='delete', obj=obj)
 
+    def serialize(self):
+        return OrderedDict((
+            ('id', self.pk),
+            ('author', self.author_id),
+            ('created', None if self.created is None else self.created.isoformat()),
+            ('proposed', None if self.proposed is None else self.proposed.isoformat()),
+            ('applied', None if self.applied is None else self.applied.isoformat()),
+            ('applied_by', None if self.applied_by_id is None else self.applied_by_id),
+            ('changes', tuple(change.serialize() for change in self.changes.all())),
+        ))
+
 
 class Change(models.Model):
     ACTIONS = (
@@ -407,3 +419,19 @@ class Change(models.Model):
             result += 'Update (m2m) object '+repr(self.obj)+': '+self.field_name+'.remove('+self.field_value+')'
         result += '>'
         return result
+
+    def serialize(self):
+        result = OrderedDict((
+            ('id', self.pk),
+            ('author', self.author_id),
+            ('created', None if self.created is None else self.created.isoformat()),
+            ('action', self.action),
+            ('object_type', self.model_class.__name__.lower()),
+            ('object_id', ('c'+str(self.pk)) if self.action == 'create' else self.obj_pk),
+        ))
+        if self.action in ('update', 'm2m_add', 'm2m_remove'):
+            result.update(OrderedDict((
+                ('name', self.field_name),
+                ('value', json.loads(self.field_value)),
+            )))
+        return result