init checkin of a data loader for the curated whitelist

taar/recommenders/s3_data.py

@@ -0,0 +1,22 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+from .utils import get_s3_json_content
+
+S3_BUCKET = 'telemetry-parquet'
+CURATED_WHITELIST = 'telemetry-ml/addon_recommender/top_200_whitelist.json'
+
+
+class WhitelistCache:
+    def __init__(self, ctx):
+        self._ctx = ctx
+
+        # Enable this check when we start using srgutils
+        # assert 'cache' in self._ctx
+
+    def get_curated_whitelist(self):
+        # TODO: replace this with the context version so we can inject
+        # S3 content easily
+        json_data = get_s3_json_content(S3_BUCKET, CURATED_WHITELIST)
+        return json_data