firebase-ios-sdk

Swift extension for RTDB (#6568)

* Added pristine version of JSONEncoder.swift to the project

* Renamed JSONEncoder and JSONDecoder and namespaced them under Database. Skip JSONSerialization steps of encoding and decoding

* Added convenience decoding to DataSnapshot and encoding to DatabaseReference

* Convert to 2 space indentation

* Added ServerTimestamp - modelled on Firestore ditto

* Added a ServerIncrement enum/property wrapper. Not too happy about the property wrapper API though

* Fix ServerTimestamp Date decoding and encoding

* Fix ServerTimestamp Date decoding and encoding

* Added API for setting default decoder and encoder

* Fix typo and linter error

* Changed requirement for ServerIncrement generic parameter to be AdditiveArithmetic instead of Numeric. Added tests for server value coding.

* Add test for alternative ServerIncrement API and demonstrate that this version of the API also models actual optionality

* Test the default encoder and decoder

* Added more tests derived from corresponding Firestore coding tests

* Ran linter

* Delete EncoderTests.swift

Ooops, I added this file prematurely.

* Added modified version of tests from apple/swift

* Rename all but a few occurrences of 'json' and add a reference to the original file from apple/swift

* Made it possible to decode Optional types

* Updated copyright messages

* Removed CodableErrors and force cast ServerValue.timestamp() based on feedback on PR

* Changed completion handler to take a Result<Void, Error>

* Add escaping to closure parameter

* Fixed format

* Change completion handler type to accept and Optional Error rather than a Result<Void, Error>

* Remove ServerIncrement for now

* Fix function signature error

* Remove Swift 4 support. Remove default encoder/decoder configuration. Add FirebaseDatabaseSwift.podspec - I don't know if it's good though, as I don't use CocoaPods myself.

* Update podspec with fixes from review

* Run scripts/style.sh

* Add -Beta to FirebaseDatabaseSwift library