Drafty should correctly parse after fix for https://github.com/tinode/tinode-js/issues/74

[dilshans2k]

Subject of the issue

The issue tinode/tinode-js#74 suggests that each character of string must be treated as grapheme.

Your environment

Server-side

• Your own setup:
  • platform: Linux
  • version of Tinode server: 0.22
  • database backend: mongo
  • standalone

Client-side

• TinodeWeb/tinodejs: javascript client
  • Browser make and version.
  • IMPORTANT! Use index-dev.html to reproduce the problem, not index.html.

Steps to reproduce

On server, ensure that push notification adapter is turned on(fcm or tnpg).
Considering preview length: 5
Two ways to reproduce:

• Send a text message from iOS such that it contains emoji(multi codepoint) and some formatting.
  For eg: Hi 🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿 🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿
• Apply this commit patch in tinode-js and send a similar message like above.

Push notification sent has wrong text when parsed through drafty.Preview and drafty.PlainText

Expected behaviour

Push notification text content should be equal to Hi 🏴󠁧󠁢󠁳󠁣󠁴󠁿🏴󠁧󠁢󠁳󠁣󠁴󠁿

Actual behaviour

Push notification text content should be equal to Hi 🏴