From 2facc67adc06ce327a46073e5339cbc50f663ec0 Mon Sep 17 00:00:00 2001
From: Chris Markiewicz <effigies@gmail.com>
Date: Fri, 14 Jul 2023 09:05:36 -0400
Subject: [PATCH] [SCHEMA] electrodes.tsv is RECOMMENDED if EEGChannelCount > 0

---
 src/schema/rules/checks/meg.yaml | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 src/schema/rules/checks/meg.yaml

diff --git a/src/schema/rules/checks/meg.yaml b/src/schema/rules/checks/meg.yaml
new file mode 100644
index 0000000000..561d66505c
--- /dev/null
+++ b/src/schema/rules/checks/meg.yaml
@@ -0,0 +1,14 @@
+# Rules for MEG data that cannot be defined in tables
+---
+MEGElectrodesRecommended:
+  issue:
+    code: MEG_EEG_ELECTRODES_RECOMMENDED
+    message: |
+      A nonzero EEGChannelCount for MEG datasets indicates the presence of EEG
+      channels. A corresponding `electrodes.tsv` file should be be added.
+    level: warning
+  selectors:
+    - suffix == "meg"
+    - sidecar.EEGChannelCount > 0
+  checks:
+    - type(associations.electrodes) != 'null'