forked from Nexus/nexus
64 lines
2 KiB
Dart
64 lines
2 KiB
Dart
import "package:collection/collection.dart";
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import "package:fast_immutable_collections/fast_immutable_collections.dart";
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import "package:flutter_riverpod/flutter_riverpod.dart";
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import "package:nexus/controllers/client_state_controller.dart";
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import "package:nexus/models/content/content.dart";
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import "package:nexus/models/content/membership.dart";
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import "package:nexus/models/content/power_levels.dart";
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import "package:nexus/models/membership_status.dart";
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import "package:nexus/models/room.dart";
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class ViaController extends Notifier<String> {
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final Room room;
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ViaController(this.room);
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@override
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String build() {
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final servers = <String>{};
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void addUserId(String? userId) {
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final server = userId?.split(":").lastOrNull;
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if (server != null) {
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servers.add(server);
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}
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}
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addUserId(ref.watch(ClientStateController.provider)?.userId);
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final powerLevelsEventId = room.state[EventType.powerLevels.type]?[""];
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final powerLevels = powerLevelsEventId == null
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? null
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: room.events[powerLevelsEventId];
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if (powerLevels?.content case PowerLevelsContent(:final users)) {
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for (final userId in users.keys) {
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addUserId(userId);
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if (servers.length >= 5) break;
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}
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}
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final members = room.state[EventType.membership.type]?.values.toIList();
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for (var i = 0; servers.length < 5; i++) {
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final membershipEventId = members?.getOrNull(i);
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final member = membershipEventId == null
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? null
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: room.events[membershipEventId];
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if (member?.content case MembershipContent(:final status)) {
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if (status == MembershipStatus.join) {
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addUserId(member?.stateKey);
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}
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}
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if (members?.getOrNull(i) == null) break;
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}
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return servers.isEmpty
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? ""
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: "?${servers.map((server) => "via=$server").join("&")}";
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}
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static final provider = NotifierProvider.family<ViaController, String, Room>(
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ViaController.new,
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);
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}
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