Add incident column for when an incident occurred at (#2212)

Add incident column for when an incident occurred at. Closes #2208
[ci skip] [skip ci]

app/helpers.php

@@ -177,3 +177,61 @@ if (!function_exists('cachet_redirect')) {
         return app('redirect')->to($url, $status, $headers);
     }
 }
+
+if (!function_exists('datetime_to_moment')) {
+    /**
+     * Convert PHP datetimes to moment.js formats.
+     *
+     * Thanks to http://stackoverflow.com/a/30192680/394013
+     *
+     * @param string $format
+     *
+     * @return string
+     */
+    function datetime_to_moment($format)
+    {
+        $replacements = [
+            'd' => 'DD',
+            'D' => 'ddd',
+            'j' => 'D',
+            'l' => 'dddd',
+            'N' => 'E',
+            'S' => 'o',
+            'w' => 'e',
+            'z' => 'DDD',
+            'W' => 'W',
+            'F' => 'MMMM',
+            'm' => 'MM',
+            'M' => 'MMM',
+            'n' => 'M',
+            't' => '', // no equivalent
+            'L' => '', // no equivalent
+            'o' => 'YYYY',
+            'Y' => 'YYYY',
+            'y' => 'YY',
+            'a' => 'a',
+            'A' => 'A',
+            'B' => '', // no equivalent
+            'g' => 'h',
+            'G' => 'H',
+            'h' => 'hh',
+            'H' => 'HH',
+            'i' => 'mm',
+            's' => 'ss',
+            'u' => 'SSS',
+            'e' => 'zz', // deprecated since version 1.6.0 of moment.js
+            'I' => '', // no equivalent
+            'O' => '', // no equivalent
+            'P' => '', // no equivalent
+            'T' => '', // no equivalent
+            'Z' => '', // no equivalent
+            'c' => '', // no equivalent
+            'r' => '', // no equivalent
+            'U' => 'X',
+        ];
+
+        $momentFormat = strtr($format, $replacements);
+
+        return $momentFormat;
+    }
+}