Modern state layer

[laevandus]

🔗 Issue Links

Resolves ios-issues-tracking/728

🎯 Goal

Add a modern state layer with async-await and observable state objects

📝 Summary

A new set of types which represent a new way how to interact with Stream API (alternative way to controllers).

• Leverages async-await
• Method calls wait for API requests to finish
• Main actor guarded state objects for easy way for observing data changes

New types:

• ChannelList & ChannelListState
• Chat & ChatState + MessageState
• ConnectedUser + ConnectedUserState
• MemberList + MemberListState
• MessageSearch + MessageSearchState
• ReactionList + ReactionListState
• UserList + UserListState
• UserSearch + UserSearchState

☑️ Contributor Checklist

• [x] I have signed the Stream CLA (required)
• [x] This change follows zero ⚠️ policy (required)
• [x] This change should be manually QAed
• [x] Changelog is updated with client-facing changes
• [x] New code is covered by unit tests
• [ ] Comparison screenshots added for visual changes
• [x] Affected documentation updated (docusaurus, tutorial, CMS)

[Stream-SDK-Bot]

StreamChat XCMetrics

target	metric	benchmark	branch	performance	status
MessageList	Hitches total duration	10 ms	5.01 ms	49.9% 🔼	🟢
	Duration	2.6 s	2.55 s	1.92% 🔼	🟢
	Hitch time ratio	4 ms per s	1.97 ms per s	50.75% 🔼	🟢
	Frame rate	79 fps	78.04 fps	1.22% 🔼	🟢
	Number of hitches	1	0.6	40.0% 🔼	🟢
ChannelList	Hitches total duration	12.5 ms	1.67 ms	86.64% 🔼	🟢
	Duration	2.6 s	1.37 s	47.31% 🔼	🟢
	Hitch time ratio	5 ms per s	1.17 ms per s	76.6% 🔼	🟢
	Frame rate	76 fps	86.89 fps	-14.33% 🔽	🔴
	Number of hitches	1.2	0.2	83.33% 🔼	🟢

[github-actions[bot]]

	1 Warning
:warning:	Big PR

Generated by :no_entry_sign: Danger

[sonarqubecloud[bot]]

Quality Gate passed

Issues
98 New issues
0 Accepted issues

Measures
0 Security Hotspots
84.8% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud