1 files changed, 62 insertions, 0 deletions
diff --git a/src/data/composite/wiki-data/withDirectory.js b/src/data/composite/wiki-data/withDirectory.js
new file mode 100644
index 00000000..f3bedf2e
--- /dev/null
+++ b/src/data/composite/wiki-data/withDirectory.js
@@ -0,0 +1,62 @@
+// Select a directory, either using a manually specified directory, or
+// computing it from a name. By default these values are the current thing's
+// 'directory' and 'name' properties, so it can be used without any options
+// to get the current thing's effective directory (assuming no custom rules).
+
+import {input, templateCompositeFrom} from '#composite';
+
+import {isDirectory, isName} from '#validators';
+
+import {raiseOutputWithoutDependency} from '#composite/control-flow';
+
+import withSimpleDirectory from './helpers/withSimpleDirectory.js';
+
+export default templateCompositeFrom({
+  annotation: `withDirectory`,
+
+  inputs: {
+    directory: input({
+      validate: isDirectory,
+      defaultDependency: 'directory',
+      acceptsNull: true,
+    }),
+
+    name: input({
+      validate: isName,
+      defaultDependency: 'name',
+      acceptsNull: true,
+    }),
+
+    suffix: input({
+      validate: isDirectory,
+      defaultValue: null,
+    }),
+  },
+
+  outputs: ['#directory'],
+
+  steps: () => [
+    withSimpleDirectory({
+      directory: input('directory'),
+      name: input('name'),
+    }),
+
+    raiseOutputWithoutDependency({
+      dependency: '#directory',
+      output: input.value({['#directory']: null}),
+    }),
+
+    {
+      dependencies: ['#directory', input('suffix')],
+      compute: (continuation, {
+        ['#directory']: directory,
+        [input('suffix')]: suffix,
+      }) => continuation({
+        ['#directory']:
+          (suffix
+            ? directory + '-' + suffix
+            : directory),
+      }),
+    },
+  ],
+});