Feature：Timestamp Filter

[freshchen]

Converting dates and timestamps to and from each other is very common.

I want to discuss whether we can add optional values ​​about timestamps in format in DateFilter（format，existingFormat）

e.g.： {{ time | date(existingFormat='yyyy-MMMM-dd', format='timestamp') }} {{ time | date(existingFormat='timestamp', format='yyyy-MMMM-dd') }}

optional values： timestamp timestampMillisecond

[ebussieres]

Date filter already supports Temporal and older java.util.Date, so it should cover almost all use cases.

[freshchen]

e.g.： variables：timestamp=1709564462 template：{{ timestamp | date(... ...) }} output：2024-03-04 23:01:02

I didn't find it in the test case. After looking at the code, I still don't know how to use DateFilter to achieve the above effect. Can you help tell me how to configure it?

[ebussieres]

Just use {{ timestamp | date("MM/dd/yyyy HH:mm:ss") }}. It's just plain SimpleDateFormat syntax ... not pebble related

[freshchen]

The Date constructor accepts milliseconds by default, so it does not support the second timestamp that is more commonly used in real life. This is very unintuitive for non-java programmers

If no changes are made, for date processing I have to define another timestamp filter to convert the timestamp into a millisecond timestamp, which is very troublesome to use.

The same goes for converting a formatted date into a timestamp with different time units.

[ebussieres]

You can use any Temporal date too ... such as a LocalDate, LocalDateTime, ZonedDateTime etc.

[freshchen]

Ok got it. I will add existingTimestamp parameter to my project