implemented frontend including separate message system; started to implement backend

yjs-poll/node_modules/lib0/time.js

@@ -0,0 +1,48 @@
+/**
+ * Utility module to work with time.
+ *
+ * @module time
+ */
+
+import * as metric from './metric.js'
+import * as math from './math.js'
+
+/**
+ * Return current time.
+ *
+ * @return {Date}
+ */
+export const getDate = () => new Date()
+
+/**
+ * Return current unix time.
+ *
+ * @return {number}
+ */
+export const getUnixTime = Date.now
+
+/**
+ * Transform time (in ms) to a human readable format. E.g. 1100 => 1.1s. 60s => 1min. .001 => 10μs.
+ *
+ * @param {number} d duration in milliseconds
+ * @return {string} humanized approximation of time
+ */
+export const humanizeDuration = d => {
+  if (d < 60000) {
+    const p = metric.prefix(d, -1)
+    return math.round(p.n * 100) / 100 + p.prefix + 's'
+  }
+  d = math.floor(d / 1000)
+  const seconds = d % 60
+  const minutes = math.floor(d / 60) % 60
+  const hours = math.floor(d / 3600) % 24
+  const days = math.floor(d / 86400)
+  if (days > 0) {
+    return days + 'd' + ((hours > 0 || minutes > 30) ? ' ' + (minutes > 30 ? hours + 1 : hours) + 'h' : '')
+  }
+  if (hours > 0) {
+    /* c8 ignore next */
+    return hours + 'h' + ((minutes > 0 || seconds > 30) ? ' ' + (seconds > 30 ? minutes + 1 : minutes) + 'min' : '')
+  }
+  return minutes + 'min' + (seconds > 0 ? ' ' + seconds + 's' : '')
+}