Relocate proto utils (#3621)

core/ui/src/main/kotlin/org/meshtastic/core/ui/qr/ScannedQrCodeViewModel.kt

@@ -23,8 +23,8 @@ import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.launch
 import org.meshtastic.core.data.repository.RadioConfigRepository
-import org.meshtastic.core.proto.getChannelList
 import org.meshtastic.core.service.ServiceRepository
+import org.meshtastic.core.ui.util.getChannelList
 import org.meshtastic.core.ui.viewmodel.stateInWhileSubscribed
 import org.meshtastic.proto.AppOnlyProtos
 import org.meshtastic.proto.ChannelProtos

core/ui/src/main/kotlin/org/meshtastic/core/ui/util/ProtoExtensions.kt

@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2025 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/>.
+ */
+
+package org.meshtastic.core.ui.util
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.res.stringResource
+import org.meshtastic.proto.ChannelProtos
+import org.meshtastic.proto.ChannelProtos.ChannelSettings
+import org.meshtastic.proto.MeshProtos
+import org.meshtastic.proto.MeshProtos.MeshPacket
+import org.meshtastic.proto.MeshProtos.Position
+import org.meshtastic.proto.channel
+import org.meshtastic.proto.channelSettings
+import java.text.DateFormat
+import kotlin.time.Duration.Companion.days
+import org.meshtastic.core.strings.R as Res
+
+private const val SECONDS_TO_MILLIS = 1000L
+
+@Composable
+fun MeshProtos.Position.formatPositionTime(dateFormat: DateFormat): String {
+    val currentTime = System.currentTimeMillis()
+    val sixMonthsAgo = currentTime - 180.days.inWholeMilliseconds
+    val isOlderThanSixMonths = time * SECONDS_TO_MILLIS < sixMonthsAgo
+    val timeText =
+        if (isOlderThanSixMonths) {
+            stringResource(Res.string.unknown_age)
+        } else {
+            dateFormat.format(time * SECONDS_TO_MILLIS)
+        }
+    return timeText
+}
+
+fun MeshPacket.toPosition(): Position? = if (!decoded.wantResponse) {
+    runCatching { Position.parseFrom(decoded.payload) }.getOrNull()
+} else {
+    null
+}
+
+/**
+ * Builds a [Channel] list from the difference between two [ChannelSettings] lists. Only changes are included in the
+ * resulting list.
+ *
+ * @param new The updated [ChannelSettings] list.
+ * @param old The current [ChannelSettings] list (required when disabling unused channels).
+ * @return A [Channel] list containing only the modified channels.
+ */
+fun getChannelList(new: List<ChannelSettings>, old: List<ChannelSettings>): List<ChannelProtos.Channel> = buildList {
+    for (i in 0..maxOf(old.lastIndex, new.lastIndex)) {
+        if (old.getOrNull(i) != new.getOrNull(i)) {
+            add(
+                channel {
+                    role =
+                        when (i) {
+                            0 -> ChannelProtos.Channel.Role.PRIMARY
+                            in 1..new.lastIndex -> ChannelProtos.Channel.Role.SECONDARY
+                            else -> ChannelProtos.Channel.Role.DISABLED
+                        }
+                    index = i
+                    settings = new.getOrNull(i) ?: channelSettings {}
+                },
+            )
+        }
+    }
+}