1 files changed, 40 insertions, 0 deletions
diff --git a/transformation.jsx b/transformation.jsx
new file mode 100644
index 0000000..a355f97
--- /dev/null
+++ b/transformation.jsx
@@ -0,0 +1,40 @@
+const { splitSegments } = require('./util');
+const { React } = require('powercord/webpack');
+const {
+  timezones,
+  lookup
+} = require('./tz');
+
+const timezonePattern = new RegExp('(\\d+):(\\d+) *(' + timezones.map(it => `(?:${it.code})`).join('|') + ')', 'g');
+
+function transformMessage (userTimezoneProvider, msgConstruct) {
+  if (!('content' in msgConstruct)) {
+	return msgConstruct;
+  }
+  return Object.assign({}, msgConstruct, {
+	content: msgConstruct.content.flatMap(it => transformPart(userTimezoneProvider, it))
+  });
+}
+
+function transformPart (userTimezoneProvider, part) {
+  if (typeof part === 'string') {
+	return splitSegments(part, timezonePattern).map(it => {
+	  if (typeof it === 'string') {
+		return it;
+	  }
+	  let [ _, hour, minute, tz ] = it.match;
+	  let timezone = lookup(tz);
+	  let time = hour * 60 + minute;
+	  let userTimezone = userTimezoneProvider();
+	  let offset = userTimezone.offsetminutes - timezone.offsetminutes;
+	  let adjusted = (time + offset) % (24 * 60);
+	  return (<>
+		{hour}:{minute} {timezone.code} -> {adjusted / 60}:{adjusted % 60} {userTimezone.code}
+	  </>);
+	});
+  }
+  return [ part ];
+}
+
+exports.transformMessageArray = userTimezoneProvider => args =>
+  args.map(it => transformMessage(userTimezoneProvider, it));