1 files changed, 25 insertions, 0 deletions
diff --git a/qc_app/db/platforms.py b/qc_app/db/platforms.py
new file mode 100644
index 0000000..cb527a7
--- /dev/null
+++ b/qc_app/db/platforms.py
@@ -0,0 +1,25 @@
+"""Handle db interactions for platforms."""
+from typing import Optional
+
+import MySQLdb as mdb
+from MySQLdb.cursors import DictCursor
+
+def platforms_by_species(
+        conn: mdb.Connection, speciesid: int) -> tuple[dict, ...]:
+    """Retrieve platforms by the species"""
+    with conn.cursor(cursorclass=DictCursor) as cursor:
+        cursor.execute("SELECT * FROM GeneChip WHERE SpeciesId=%s "
+                       "ORDER BY GeneChipName ASC",
+                       (speciesid,))
+        return tuple(dict(row) for row in cursor.fetchall())
+
+def platform_by_id(conn: mdb.Connection, platformid: int) -> Optional[dict]:
+    """Retrieve a platform by its ID"""
+    with conn.cursor(cursorclass=DictCursor) as cursor:
+        cursor.execute("SELECT * FROM GeneChip WHERE Id=%s",
+                       (platformid,))
+        result = cursor.fetchone()
+        if bool(result):
+            return dict(result)
+
+    return None