Fetch sampledata

* gn3/api/sampledata.py (get_sampledata): New end-point.
* gn3/app.py: Register above end-point.
* gn3/settings.py: Add new conf variable for LMDB.

Signed-off-by: Munyoki Kilyungi <me@bonfacemunyoki.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/gn3/api/sampledata.py b/gn3/api/sampledata.py
new file mode 100644
index 0000000..5b09b52
--- /dev/null
+++ b/gn3/api/sampledata.py
@@ -0,0 +1,23 @@
+"""API for fetching sampledata from a given trait"""
+import os
+from flask import Blueprint
+from flask import jsonify
+from flask import current_app
+
+from gn3.db.matrix import get_current_matrix
+
+
+sampledata = Blueprint("sampledata", __name__)
+
+
+@sampledata.route("/dataset/<dataset_name>/trait/<trait_name>", methods=["GET"])
+def get_sampledata(dataset_name, trait_name):
+    """Fetch a trait's sampledata as a matrix."""
+    return jsonify(
+        get_current_matrix(
+            os.path.join(
+                current_app.config.get("LMDB_PATH"),
+                dataset_name, trait_name
+            )
+        )
+    )