Structure changes to match other projects and minor logging improvements

static/js/utils.js

@@ -0,0 +1,40 @@
+//
+// GENERAL UTILITY FUNCTIONS
+// OBject, string manipulation etc.
+//
+
+// Utility function to escape HTML characters from a string.
+function escapeHtml(str) {
+    if (typeof str !== 'string') {
+        return '';
+    }
+
+    const escapeCharacter = (match) => {
+        switch (match) {
+            case '&':
+                return '&';
+            case '<':
+                return '&lt;';
+            case '>':
+                return '&gt;';
+            case '"':
+                return '&quot;';
+            case '\'':
+                return '&#039;';
+            case '`':
+                return '&#096;';
+            default:
+                return match;
+        }
+    };
+
+    return str.replace(/[&<>"'`]/g, escapeCharacter);
+}
+
+// Converts an HTML hex colour to an array of [R, G, B] where each is 0-255.
+function hexToRGB(hex) {
+    return hex.replace(/^#?([a-f\d])([a-f\d])([a-f\d])$/i
+        , (m, r, g, b) => '#' + r + r + g + g + b + b)
+        .substring(1).match(/.{2}/g)
+        .map(x => parseInt(x, 16));
+}