abstract_date

Description:

abstract date

abstract_date #
// registering the date systems that we want to use.
// if you don't register any adapters then
// the default adapters are going to get registered automatically.
Date.addType<ShamsiDate>(ShamsiDate());
Date.addType<GregorianDate>(GregorianDate());

// Creating a new date
var date = Date<ShamsiDate>(1379,6,26);

// Converting dates
var converted = date.to<GregorianDate>();
date = converted.to<Shamsi>();

// Type checking
if(date.isTypeOf<ShamsiDate>()){
print('its shamsi!');
}

// Other utility methods
var tomorrow = date.add(Duration(days: 1));

Duration d = date.difference(tomorrow);

var realTomorrow = date.copy(
day: date.day + 1,
);
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Date adapters #
###Adding Adapters:
Before using Date you should register the types you want to use.
Date.addType<ShamsiDate>(ShamsiDate());
Date.addType<GregorianDate>(GregorianDate());
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Setting a default adapter #
For setting an adapter as default, just register it with no generic type.
Date.addType(ShamsiDate());
...
// no generic type is used
var defaultDate = Date.now();
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Implementing a new Date adapter #
class NewDateSystem extends DateAdapter with DateFormatter {
...
}
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If you don't add the DateFormatter mixin, some methods on date will throw an exception:

formatter
monthName
weekDayName
formatted*
formatBuilder*

*: these might not throw exception if you don't use named parts.
Renaming Adapters #
If you don't like the name of a certain adapter, just extend it and register with the new class:
class Hijri extends IslamicDate {}
...
Date.addType<Hijri>(Hijri());
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DateAdapter provided implementations #

GregorianDate
HijriDate
ShamsiDate

To use them, import abstract_date and
then register them using
Date.addType<T extends DateAdapter>() before using them.