Add `DELETE` route to `off-topic-names` endpoint.

2 files changed, 68 insertions, 11 deletions

diff --git a/pysite/views/api/bot/off_topic_names.py b/pysite/views/api/bot/off_topic_names.py
index f353ab02..1c75428e 100644
--- a/pysite/views/api/bot/off_topic_names.py
+++ b/pysite/views/api/bot/off_topic_names.py
@@ -9,18 +9,24 @@ from pysite.decorators import api_key, api_params
 from pysite.mixins import DBMixin
 
 
-POST_SCHEMA = Schema({
-    'name': And(
-        str,
-        len,
-        lambda name: all(c.isalnum() or c == '-' for c in name),
-        str.islower,
-        lambda name: len(name) <= 96,
-        error=(
-            "The channel name must be a non-blank string consisting only of"
-            " lowercase regular characters and '-' with a maximum length of 96"
-        )
+OFF_TOPIC_NAME = And(
+    str,
+    len,
+    lambda name: all(c.isalnum() or c == '-' for c in name),
+    str.islower,
+    lambda name: len(name) <= 96,
+    error=(
+        "The channel name must be a non-blank string consisting only of"
+        " lowercase regular characters and '-' with a maximum length of 96"
     )
+)
+
+DELETE_SCHEMA = Schema({
+    'name': OFF_TOPIC_NAME
+})
+
+POST_SCHEMA = Schema({
+    'name': OFF_TOPIC_NAME
 })
 
 
@@ -30,6 +36,25 @@ class OffTopicNamesView(APIView, DBMixin):
     table_name = "off_topic_names"
 
     @api_key
+    @api_params(schema=DELETE_SCHEMA, validation_type=ValidationTypes.params)
+    def delete(self, params):
+        """
+        Removes a single off-topic name from the database.
+        Returns the result of the deletion call.
+
+        API key must be provided as header.
+        Name to delete must be provided as the `name` query argument.
+        """
+
+        result = self.db.delete(
+            self.table_name,
+            params['name'],
+            return_changes=True
+        )
+
+        return jsonify(result)
+
+    @api_key
     def get(self):
         """
         Fetch all known off-topic channel names from the database.
diff --git a/tests/test_api_bot_off_topic_names.py b/tests/test_api_bot_off_topic_names.py
index f0d0fe3e..6227ddef 100644
--- a/tests/test_api_bot_off_topic_names.py
+++ b/tests/test_api_bot_off_topic_names.py
@@ -100,3 +100,35 @@ class RandomSampleEndpointTests(SiteTest):
         )
         self.assert200(response)
         self.assertEqual(len(response.json), 1)
+
+
+class DeletingANameEndpointTests(SiteTest):
+    """Tests deleting a name from the database using DELETE."""
+
+    CHANNEL_NAME = 'duck-goes-meow'
+
+    def setUp(self):
+        response = self.client.post(
+            f'/bot/off-topic-names?name={self.CHANNEL_NAME}',
+            app.config['API_SUBDOMAIN'],
+            headers=app.config['TEST_HEADER']
+        )
+        self.assert200(response)
+
+    def test_deleting_random_name_returns_deleted_0(self):
+        response = self.client.delete(
+            '/bot/off-topic-names?name=my-totally-random-name',
+            app.config['API_SUBDOMAIN'],
+            headers=app.config['TEST_HEADER']
+        )
+        self.assert200(response)
+        self.assertEqual(response.json['deleted'], 0)
+
+    def test_deleting_channel_name_returns_deleted_1(self):
+        response = self.client.delete(
+            f'/bot/off-topic-names?name={self.CHANNEL_NAME}',
+            app.config['API_SUBDOMAIN'],
+            headers=app.config['TEST_HEADER']
+        )
+        self.assert200(response)
+        self.assertEqual(response.json['deleted'], 1)