Added ability to search API logs (#24)

Author: jsma

README.md

@@ -438,6 +438,40 @@ Creating a search key that will only search over the body field.
 {'source_engines': ['source-engine-1', 'source-engine-2'], 'type': 'meta', 'name': 'my-meta-engine'}
 ```
 
+### Search the API logs
+
+```python
+>>> client.get_api_logs('my-meta-engine', {
+  "filters": {
+    "date": {
+      "from": "2020-03-30T00:00:00+00:00",
+      "to": "2020-03-31T00:00:00+00:00"
+    },
+    "status": "429",
+  }
+})
+{
+    'results': [],
+    'meta': {
+        'query': '',
+        'filters': {
+            'date': {
+                'from': '2020-03-27T00:00:00+00:00',
+                'to': '2020-03-31T00:00:00+00:00'
+            },
+            'status': '429'
+        },
+        'sort_direction': 'asc',
+        'page': {
+            'current': 1,
+            'total_pages': 0,
+            'total_results': 0,
+            'size': 10
+        }
+    }
+}
+```
+
 ### Get search settings
 
 ```python

elastic_app_search/client.py

@@ -349,3 +349,15 @@ def create_signed_search_key(api_key, api_key_name, options):
         """
         options['api_key_name'] = api_key_name
         return jwt.encode(options, api_key, algorithm=Client.SIGNED_SEARCH_TOKEN_JWT_ALGORITHM)
+
+    def get_api_logs(self, engine_name, options=None):
+        """
+        Searches the API logs.
+
+        :param engine_name: Name of engine.
+        :param options: Dict of search options.
+        """
+        endpoint = "engines/{}/logs/api".format(engine_name)
+        options = options or {}
+        return self.session.request('get', endpoint, json=options)
+

tests/test_client.py

@@ -553,6 +553,18 @@ def test_delete_meta_engine_sources(self):
                 self.engine_name, [source_engine_name])
             self.assertEqual(response, expected_return)
 
+    def test_get_api_logs(self):
+        expected_return = {'meta': {}, 'results': []}
+
+        with requests_mock.Mocker() as m:
+            url = "{}/{}".format(
+                self.client.session.base_url,
+                "engines/{}/logs/api".format(self.engine_name)
+            )
+            m.register_uri('GET', url, json=expected_return, status_code=200)
+            response = self.client.get_api_logs(self.engine_name, options={})
+            self.assertEqual(response, expected_return)
+
     def test_get_search_settings(self):
         expected_return = {
             "search_fields": {