ui(admin): add "working" React admin ui

resources/scripts/helpers/splitStringWhitespace.ts

@@ -0,0 +1,27 @@
+/**
+ * Takes a string and splits it into an array by whitespace, ignoring any
+ * text that is wrapped in quotes. You must escape quotes within a quoted
+ * string, otherwise it will just split on those.
+ *
+ * Derived from https://stackoverflow.com/a/46946420
+ */
+export default (str: string): string[] => {
+    let quoted = false;
+    const parts = [ '' ] as string[];
+
+    for (const char of (str.trim().match(/\\?.|^$/g) || [])) {
+        if (char === '"') {
+            quoted = !quoted;
+        } else if (!quoted && char === ' ') {
+            parts.push('');
+        } else {
+            parts[Math.max(parts.length - 1, 0)] += char.replace(/\\(.)/, '$1');
+        }
+    }
+
+    if (parts.length === 1 && parts[0] === '') {
+        return [];
+    }
+
+    return parts;
+};