From e5370d2a7bce4976d030f6b2923fb63b0be62b95 Mon Sep 17 00:00:00 2001
From: "D. Can Celasun" <can@dcc.im>
Date: Sat, 22 Sep 2018 10:23:14 +0200
Subject: [PATCH] Add synonym handling for tags

This fixes #247, but can be used handle other synonyms in the future.
---
 tildes/tests/test_topic_tags.py | 6 ++++++
 tildes/tildes/schemas/topic.py  | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/tildes/tests/test_topic_tags.py b/tildes/tests/test_topic_tags.py
index 5fc8104..a988be4 100644
--- a/tildes/tests/test_topic_tags.py
+++ b/tildes/tests/test_topic_tags.py
@@ -36,3 +36,9 @@ def test_tags_lowercased(text_topic):
     """Ensure tags get converted to lowercase."""
     text_topic.tags = ["ONE", "Two", "thRee"]
     assert text_topic.tags == ["one", "two", "three"]
+
+
+def test_tags_synonyms(text_topic):
+    """ Ensure synonyms are replaced."""
+    text_topic.tags = ["spoilers"]
+    assert text_topic.tags == ["spoiler"]
diff --git a/tildes/tildes/schemas/topic.py b/tildes/tildes/schemas/topic.py
index 8e6fc0b..0019555 100644
--- a/tildes/tildes/schemas/topic.py
+++ b/tildes/tildes/schemas/topic.py
@@ -16,6 +16,7 @@ from tildes.schemas.group import GroupSchema
 from tildes.schemas.user import UserSchema
 
 TITLE_MAX_LENGTH = 200
+TAG_SYNONYMS = {"spoiler": ["spoilers"]}
 
 
 class TopicSchema(Schema):
@@ -57,6 +58,11 @@ class TopicSchema(Schema):
             if not tag or tag.isspace():
                 continue
 
+            # handle synonyms
+            for name, synonyms in TAG_SYNONYMS.items():
+                if tag in synonyms:
+                    tag = name
+
             # skip any duplicate tags
             if tag in tags:
                 continue