data: factor out performAvailabilityCheck

1 files changed, 19 insertions, 0 deletions

diff --git a/src/data/composite/control-flow/helpers/performAvailabilityCheck.js b/src/data/composite/control-flow/helpers/performAvailabilityCheck.js
new file mode 100644
index 00000000..0e44ab59
--- /dev/null
+++ b/src/data/composite/control-flow/helpers/performAvailabilityCheck.js
@@ -0,0 +1,19 @@
+import {empty} from '#sugar';
+
+export default function performAvailabilityCheck(value, mode) {
+  switch (mode) {
+    case 'null':
+      return value !== undefined && value !== null;
+
+    case 'empty':
+      return value !== undefined && !empty(value);
+
+    case 'falsy':
+      return !!value && (!Array.isArray(value) || !empty(value));
+
+    case 'index':
+      return typeof value === 'number' && value >= 0;
+  }
+
+  return undefined;
+}