Node / meshtastic / Meshtastic-Android / files / core / data / src / commonMain / kotlin / org / meshtastic / core / data / datasource / SwitchingChannelSetDataSource.kt

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T8b949e/*

* Copyright (c) 2026 Meshtastic LLC

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

Tff7b72package T7ee787org.meshtastic.core.data.datasource

Tff7b72import T7ee787kotlinx.coroutines.flow.Flow

Tff7b72import T7ee787kotlinx.coroutines.flow.distinctUntilChanged

Tff7b72import T7ee787kotlinx.coroutines.flow.flatMapLatest

Tff7b72import T7ee787kotlinx.coroutines.flow.map

Tff7b72import T7ee787kotlinx.coroutines.sync.Mutex

Tff7b72import T7ee787kotlinx.coroutines.sync.withLock

Tff7b72import T7ee787kotlinx.coroutines.withContext

Tff7b72import T7ee787org.koin.core.annotation.Single

Tff7b72import T7ee787org.meshtastic.core.database.DatabaseProvider

Tff7b72import T7ee787org.meshtastic.core.database.entity.ChannelSetEntity

Tff7b72import T7ee787org.meshtastic.core.di.CoroutineDispatchers

Tff7b72import T7ee787org.meshtastic.proto.Channel

Tff7b72import T7ee787org.meshtastic.proto.ChannelSet

Tff7b72import T7ee787org.meshtastic.proto.ChannelSettings

Tff7b72import T7ee787org.meshtastic.proto.Config

T8b949e/**

* Per-device channel-set storage backed by the current device's Room database.

*

* Replaces the former single global `channel_set.pb` DataStore. The channel set now switches with

* [DatabaseProvider.currentDb], exactly like messages and nodes, so switching between devices can no longer render one

* device's conversations against another device's channels (#4623).

*

* The whole [ChannelSet] proto is stored in one row (see [ChannelSetEntity]); mutations are read-modify-write, so they

* are serialized through [writeMutex] to preserve the atomicity the old DataStore's `updateData {}` provided (the

* handshake fires overlapping [updateChannelSettings] calls as it downloads channels one by one).

*/

Tf0883e@Single

Tff7b72class T56d364SwitchingChannelSetDataSourceTb4b4b4(

Tff7b72private Tff7b72val Te6edf3dbManagerTb4b4b4: Te6edf3DatabaseProviderTb4b4b4,

Tff7b72private Tff7b72val Te6edf3dispatchersTb4b4b4: Te6edf3CoroutineDispatchersTb4b4b4,

Tb4b4b4) Tb4b4b4{

Tff7b72private Tff7b72val Te6edf3writeMutex Tff7b72= Te6edf3MutexTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3channelSetFlowTb4b4b4: Te6edf3FlowTff7b72<Te6edf3ChannelSetTff7b72> Tff7b72=

Te6edf3dbManagerTb4b4b4.Te6edf3currentDb

Tb4b4b4.Te6edf3flatMapLatest Tb4b4b4{ Te6edf3db Tff7b72-Tff7b72> Te6edf3dbTb4b4b4.Te6edf3channelSetDaoTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3observeTb4b4b4(Tb4b4b4) Tb4b4b4}

Tb4b4b4.Te6edf3map Tb4b4b4{ Te6edf3entity Tff7b72-Tff7b72> Te6edf3entityTff7b72?.Te6edf3channelSet Tff7b72?: Te6edf3ChannelSetTb4b4b4(Tb4b4b4) Tb4b4b4}

Tb4b4b4.Te6edf3distinctUntilChangedTb4b4b4(Tb4b4b4)

Tff7b72suspend Tff7b72fun Td2a8ffclearChannelSetTb4b4b4(Tb4b4b4) Tb4b4b4{

T8b949e// Must take writeMutex like mutate() -- otherwise a concurrent mutate() can read the row before this delete,

T8b949e// then upsert it back afterwards, silently undoing the clear.

Te6edf3withContextTb4b4b4(Te6edf3dispatchersTb4b4b4.Te6edf3ioTb4b4b4) Tb4b4b4{ Te6edf3writeMutexTb4b4b4.Te6edf3withLock Tb4b4b4{ Te6edf3dbManagerTb4b4b4.Te6edf3withDb Tb4b4b4{ Tffa657itTb4b4b4.Te6edf3channelSetDaoTb4b4b4(Tb4b4b4)Tb4b4b4.Te6edf3clearTb4b4b4(Tb4b4b4) Tb4b4b4} Tb4b4b4} Tb4b4b4}

Tb4b4b4}

T8b949e/** Replaces all [ChannelSettings] in a single atomic operation. */

Tff7b72suspend Tff7b72fun Td2a8ffreplaceAllSettingsTb4b4b4(Te6edf3settingsListTb4b4b4: Te6edf3ListTff7b72<Te6edf3ChannelSettingsTff7b72>Tb4b4b4) Tb4b4b4{

Te6edf3mutate Tb4b4b4{ Tffa657itTb4b4b4.Te6edf3copyTb4b4b4(Te6edf3settings Tff7b72= Te6edf3settingsListTb4b4b4) Tb4b4b4}

Tb4b4b4}

T8b949e/** Places [channel]'s settings at its index, resizing with blank channels to fill any gap (parity with legacy). */

Tff7b72suspend Tff7b72fun Td2a8ffupdateChannelSettingsTb4b4b4(Te6edf3channelTb4b4b4: Te6edf3ChannelTb4b4b4) Tb4b4b4{

Tff7b72if Tb4b4b4(Te6edf3channelTb4b4b4.Te6edf3role Tff7b72=Tff7b72= Te6edf3ChannelTb4b4b4.Te6edf3RoleTb4b4b4.Te6edf3DISABLEDTb4b4b4) Tff7b72return

Te6edf3mutate Tb4b4b4{ Te6edf3current Tff7b72-Tff7b72>

Tff7b72val Te6edf3settings Tff7b72= Te6edf3currentTb4b4b4.Te6edf3settingsTb4b4b4.Te6edf3toMutableListTb4b4b4(Tb4b4b4)

Tff7b72while Tb4b4b4(Te6edf3settingsTb4b4b4.Te6edf3size Tff7b72<Tff7b72= Te6edf3channelTb4b4b4.Te6edf3indexTb4b4b4) Tb4b4b4{

Te6edf3settingsTb4b4b4.Te6edf3addTb4b4b4(Te6edf3ChannelSettingsTb4b4b4(Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Te6edf3settingsTff7b72[Te6edf3channelTb4b4b4.Te6edf3indexTff7b72] Tff7b72= Te6edf3channelTb4b4b4.Te6edf3settings Tff7b72?: Te6edf3ChannelSettingsTb4b4b4(Tb4b4b4)

Te6edf3currentTb4b4b4.Te6edf3copyTb4b4b4(Te6edf3settings Tff7b72= Te6edf3settingsTb4b4b4)

Tb4b4b4}

Tb4b4b4}

Tff7b72suspend Tff7b72fun Td2a8ffsetLoraConfigTb4b4b4(Te6edf3configTb4b4b4: Te6edf3ConfigTb4b4b4.Te6edf3LoRaConfigTb4b4b4) Tb4b4b4{

Te6edf3mutate Tb4b4b4{ Tffa657itTb4b4b4.Te6edf3copyTb4b4b4(Te6edf3lora_config Tff7b72= Te6edf3configTb4b4b4) Tb4b4b4}

Tb4b4b4}

Tff7b72private Tff7b72suspend Tff7b72fun Td2a8ffmutateTb4b4b4(Te6edf3transformTb4b4b4: Tb4b4b4(Te6edf3ChannelSetTb4b4b4) Tff7b72-Tff7b72> Te6edf3ChannelSetTb4b4b4) Tb4b4b4{

Te6edf3withContextTb4b4b4(Te6edf3dispatchersTb4b4b4.Te6edf3ioTb4b4b4) Tb4b4b4{

Te6edf3writeMutexTb4b4b4.Te6edf3withLock Tb4b4b4{

Te6edf3dbManagerTb4b4b4.Te6edf3withDb Tb4b4b4{ Te6edf3db Tff7b72-Tff7b72>

Tff7b72val Te6edf3dao Tff7b72= Te6edf3dbTb4b4b4.Te6edf3channelSetDaoTb4b4b4(Tb4b4b4)

Tff7b72val Te6edf3current Tff7b72= Te6edf3daoTb4b4b4.Te6edf3getTb4b4b4(Tb4b4b4)Tff7b72?.Te6edf3channelSet Tff7b72?: Te6edf3ChannelSetTb4b4b4(Tb4b4b4)

Te6edf3daoTb4b4b4.Te6edf3upsertTb4b4b4(Te6edf3ChannelSetEntityTb4b4b4(Te6edf3channelSet Tff7b72= Te6edf3transformTb4b4b4(Te6edf3currentTb4b4b4)Tb4b4b4)Tb4b4b4)

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}

Tb4b4b4}