Check how dates and times are rendered across the application

[bmarty]

Here is a list of all the places where time and or date are rendered across the application.
We could want to review them, and decide for a format.

Constraints are:

• the date and time must render correctly regarding the current Locale
• the date and time may render differently depending on the diff with now
• other?

Element X Android has a recent update on this part, and we have introduced date and time "Mode" (DateFormatterMode, code), combined with a boolean useRelative:

interface DateFormatter {
    fun format(
        timestamp: Long?,
        mode: DateFormatterMode = DateFormatterMode.Full,
        useRelative: Boolean = false,
    ): String
}

enum class DateFormatterMode {
    /**
     * Full date and time.
     * Example:
     * "April 6, 1980 at 6:35 PM"
     * Format can be shorter when useRelative is true.
     * Example:
     * "6:35 PM"
     */
    Full,

    /**
     * Only month and year.
     * Example:
     * "April 1980"
     * "This month" can be returned when useRelative is true.
     * Example:
     * "This month"
     */
    Month,

    /**
     * Only day.
     * Example:
     * "Sunday 6 April"
     * "Today", "Yesterday" and day of week can be returned when useRelative is true.
     */
    Day,

    /**
     * Time if same day, else date.
     */
    TimeOrDate,

    /**
     * Only time whatever the day.
     */
    TimeOnly,
}

Usage	Comment	Mode	useRelative	Screenshot
Room list last message	-	TimeOrDate	true
Timeline day separator	-	Day	true
Timeline event	This is not ideal without sticky headers for the day, when scrolling through history, but sticky headers are coming "soon"	TimeOnly	false
Event details	-	Full	true
Gallery month separator	-	Month	true
Gallery item top title	-	Day	false
Gallery item detail	-	Full	false
Reaction details	-	TimeOrDate	false
Read receipt details	-	TimeOrDate	false
Poll in poll history	-	Day	true
Incoming verification request	-	TimeOrDate	false