restructure commands

packages/core/src/commands/first.ts

@@ -0,0 +1,18 @@
+import { Command } from '../types'
+
+/**
+ * Runs one command after the other and stops at the first which returns true.
+ */
+export const first = (commands: Command[] | ((props: Parameters<Command>[0]) => Command[])): Command => props => {
+  const items = typeof commands === 'function'
+    ? commands(props)
+    : commands
+
+  for (let i = 0; i < items.length; i += 1) {
+    if (items[i](props)) {
+      return true
+    }
+  }
+
+  return false
+}