From 53155b27531b8d2ad51745228399a236ea7cf435 Mon Sep 17 00:00:00 2001
From: "(quasar) nebula" <qznebula@protonmail.com>
Date: Wed, 6 Mar 2024 14:23:33 -0400
Subject: data: exposeWhetherDependencyAvailable

---
 .../exposeWhetherDependencyAvailable.js            | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 src/data/composite/control-flow/exposeWhetherDependencyAvailable.js

(limited to 'src/data/composite/control-flow/exposeWhetherDependencyAvailable.js')

diff --git a/src/data/composite/control-flow/exposeWhetherDependencyAvailable.js b/src/data/composite/control-flow/exposeWhetherDependencyAvailable.js
new file mode 100644
index 00000000..a2fdd6b0
--- /dev/null
+++ b/src/data/composite/control-flow/exposeWhetherDependencyAvailable.js
@@ -0,0 +1,42 @@
+// Exposes true if a dependency is available, and false otherwise,
+// or the reverse if the `negate` input is set true.
+//
+// See withResultOfAvailabilityCheck for {mode} options.
+
+import {input, templateCompositeFrom} from '#composite';
+
+import inputAvailabilityCheckMode from './inputAvailabilityCheckMode.js';
+import withResultOfAvailabilityCheck from './withResultOfAvailabilityCheck.js';
+
+export default templateCompositeFrom({
+  annotation: `exposeWhetherDependencyAvailable`,
+
+  compose: false,
+
+  inputs: {
+    dependency: input({acceptsNull: true}),
+
+    mode: inputAvailabilityCheckMode(),
+
+    negate: input({type: 'boolean', defaultValue: false}),
+  },
+
+  steps: () => [
+    withResultOfAvailabilityCheck({
+      from: input('dependency'),
+      mode: input('mode'),
+    }),
+
+    {
+      dependencies: ['#availability', input('negate')],
+
+      compute: ({
+        ['#availability']: availability,
+        [input('negate')]: negate,
+      }) =>
+        (negate
+          ? !availability
+          : availability),
+    },
+  ],
+});
-- 
cgit 1.3.0-6-gf8a5