First Commit

features/viewfolder/api/build.gradle.kts

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+plugins {
+    id("io.element.android-compose-library")
+}
+
+android {
+    namespace = "io.element.android.features.viewfolder.api"
+}
+
+dependencies {
+    implementation(projects.libraries.architecture)
+}

features/viewfolder/api/src/main/kotlin/io/element/android/features/viewfolder/api/TextFileViewer.kt

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+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.api
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import kotlinx.collections.immutable.ImmutableList
+
+fun interface TextFileViewer {
+    @Composable
+    fun Render(
+        lines: ImmutableList<String>,
+        modifier: Modifier,
+    )
+}

features/viewfolder/api/src/main/kotlin/io/element/android/features/viewfolder/api/ViewFolderEntryPoint.kt

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+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.api
+
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.core.node.Node
+import com.bumble.appyx.core.plugin.Plugin
+import io.element.android.libraries.architecture.FeatureEntryPoint
+
+interface ViewFolderEntryPoint : FeatureEntryPoint {
+    data class Params(
+        val rootPath: String,
+    )
+
+    fun createNode(
+        parentNode: Node,
+        buildContext: BuildContext,
+        params: Params,
+        callback: Callback,
+    ): Node
+
+    interface Callback : Plugin {
+        fun onDone()
+    }
+}

features/viewfolder/impl/build.gradle.kts

@@ -0,0 +1,33 @@
+import extension.setupDependencyInjection
+import extension.testCommonDependencies
+
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+plugins {
+    id("io.element.android-compose-library")
+    id("kotlin-parcelize")
+}
+
+android {
+    namespace = "io.element.android.features.viewfolder.impl"
+}
+
+setupDependencyInjection()
+
+dependencies {
+    implementation(projects.libraries.androidutils)
+    implementation(projects.libraries.architecture)
+    implementation(projects.libraries.core)
+    implementation(projects.libraries.designsystem)
+    implementation(projects.libraries.uiStrings)
+    api(projects.features.viewfolder.api)
+
+    testCommonDependencies(libs)
+    testImplementation(projects.libraries.matrix.test)
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/DefaultTextFileViewer.kt

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+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.ContributesBinding
+import io.element.android.features.viewfolder.api.TextFileViewer
+import io.element.android.features.viewfolder.impl.file.ColorationMode
+import io.element.android.features.viewfolder.impl.file.FileContent
+import kotlinx.collections.immutable.ImmutableList
+
+@ContributesBinding(AppScope::class)
+class DefaultTextFileViewer : TextFileViewer {
+    @Composable
+    override fun Render(
+        lines: ImmutableList<String>,
+        modifier: Modifier
+    ) {
+        FileContent(
+            lines = lines,
+            colorationMode = ColorationMode.None,
+            modifier = modifier
+        )
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/DefaultViewFolderEntryPoint.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl
+
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.core.node.Node
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.ContributesBinding
+import io.element.android.features.viewfolder.api.ViewFolderEntryPoint
+import io.element.android.features.viewfolder.impl.root.ViewFolderFlowNode
+import io.element.android.libraries.architecture.createNode
+
+@ContributesBinding(AppScope::class)
+class DefaultViewFolderEntryPoint : ViewFolderEntryPoint {
+    override fun createNode(
+        parentNode: Node,
+        buildContext: BuildContext,
+        params: ViewFolderEntryPoint.Params,
+        callback: ViewFolderEntryPoint.Callback,
+    ): Node {
+        return parentNode.createNode<ViewFolderFlowNode>(
+            buildContext = buildContext,
+            plugins = listOf(
+                ViewFolderFlowNode.Inputs(params.rootPath),
+                callback,
+            ),
+        )
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/FileContent.kt

@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.drawWithContent
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import io.element.android.compound.theme.ElementTheme
+import io.element.android.libraries.androidutils.system.copyToClipboard
+import io.element.android.libraries.designsystem.theme.components.Text
+import io.element.android.libraries.ui.strings.CommonStrings
+import kotlinx.collections.immutable.ImmutableList
+
+@Composable
+internal fun FileContent(
+    lines: ImmutableList<String>,
+    colorationMode: ColorationMode,
+    modifier: Modifier = Modifier,
+) {
+    LazyColumn(
+        modifier = modifier
+    ) {
+        if (lines.isEmpty()) {
+            item {
+                Spacer(Modifier.size(80.dp))
+                Text(
+                    text = stringResource(CommonStrings.common_empty_file),
+                    textAlign = TextAlign.Center,
+                    color = MaterialTheme.colorScheme.tertiary,
+                    modifier = Modifier.fillMaxWidth()
+                )
+            }
+        } else {
+            itemsIndexed(
+                items = lines,
+            ) { index, line ->
+                LineRow(
+                    lineNumber = index + 1,
+                    line = line,
+                    colorationMode = colorationMode,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun LineRow(
+    lineNumber: Int,
+    line: String,
+    colorationMode: ColorationMode,
+) {
+    val context = LocalContext.current
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .clickable(onClick = {
+                context.copyToClipboard(
+                    text = line,
+                    toastMessage = context.getString(CommonStrings.common_line_copied_to_clipboard),
+                )
+            })
+    ) {
+        Text(
+            modifier = Modifier
+                .widthIn(min = 36.dp)
+                .padding(horizontal = 4.dp),
+            text = "$lineNumber",
+            textAlign = TextAlign.End,
+            color = ElementTheme.colors.textSecondary,
+            style = ElementTheme.typography.fontBodyMdMedium,
+        )
+        val color = ElementTheme.colors.textSecondary
+        val width = 0.5.dp.value
+        Text(
+            modifier = Modifier
+                .weight(1f)
+                .drawWithContent {
+                    // Using .height(IntrinsicSize.Min) on the Row does not work well inside LazyColumn
+                    drawLine(
+                        color = color,
+                        start = Offset(0f, 0f),
+                        end = Offset(0f, size.height),
+                        strokeWidth = width
+                    )
+                    drawContent()
+                }
+                .padding(horizontal = 4.dp),
+            text = line,
+            color = line.toColor(colorationMode),
+            style = ElementTheme.typography.fontBodyMdRegular
+        )
+    }
+}
+
+/**
+ * Convert a line to a color.
+ * Ex for logcat:
+ * `01-23 13:14:50.740 25818 25818 D org.matrix.rust.sdk: elementx: SyncIndicator = Hide | RustRoomListService.kt:81`
+ *                                 ^ use this char to determine the color
+ * Ex for Rust logs:
+ * `2024-01-26T10:22:26.947416Z  WARN elementx: Restore with non-empty map | MatrixClientsHolder.kt:68`
+ *                                  ^ use this char to determine the color, see [LogLevel]
+ */
+@Composable
+private fun String.toColor(colorationMode: ColorationMode): Color {
+    return when (colorationMode) {
+        ColorationMode.Logcat -> when (getOrNull(31)) {
+            'D' -> colorDebug
+            'I' -> colorInfo
+            'W' -> colorWarning
+            'E' -> colorError
+            'A' -> colorError
+            else -> ElementTheme.colors.textPrimary
+        }
+        ColorationMode.RustLogs -> when (getOrNull(32)) {
+            'E' -> ElementTheme.colors.textPrimary
+            'G' -> colorDebug
+            'O' -> colorInfo
+            'N' -> colorWarning
+            'R' -> colorError
+            else -> ElementTheme.colors.textPrimary
+        }
+        ColorationMode.None -> ElementTheme.colors.textPrimary
+    }
+}
+
+private val colorDebug = Color(0xFF299999)
+private val colorInfo = Color(0xFFABC023)
+private val colorWarning = Color(0xFFBBB529)
+private val colorError = Color(0xFFFF6B68)

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/FileContentReader.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.ContributesBinding
+import io.element.android.libraries.core.coroutine.CoroutineDispatchers
+import io.element.android.libraries.core.extensions.runCatchingExceptions
+import kotlinx.coroutines.withContext
+import java.io.File
+
+interface FileContentReader {
+    suspend fun getLines(path: String): Result<List<String>>
+}
+
+@ContributesBinding(AppScope::class)
+class DefaultFileContentReader(
+    private val dispatchers: CoroutineDispatchers,
+) : FileContentReader {
+    override suspend fun getLines(path: String): Result<List<String>> = withContext(dispatchers.io) {
+        runCatchingExceptions {
+            File(path).readLines()
+        }
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/FileSave.kt

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import android.content.ContentValues
+import android.content.Context
+import android.os.Build
+import android.os.Environment
+import android.provider.MediaStore
+import androidx.annotation.RequiresApi
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.ContributesBinding
+import io.element.android.libraries.androidutils.system.toast
+import io.element.android.libraries.core.coroutine.CoroutineDispatchers
+import io.element.android.libraries.core.extensions.runCatchingExceptions
+import io.element.android.libraries.core.mimetype.MimeTypes
+import io.element.android.libraries.di.annotations.ApplicationContext
+import kotlinx.coroutines.withContext
+import timber.log.Timber
+import java.io.File
+import java.io.FileOutputStream
+
+interface FileSave {
+    suspend fun save(
+        path: String,
+    )
+}
+
+@ContributesBinding(AppScope::class)
+class DefaultFileSave(
+    @ApplicationContext private val context: Context,
+    private val dispatchers: CoroutineDispatchers,
+) : FileSave {
+    override suspend fun save(
+        path: String,
+    ) {
+        withContext(dispatchers.io) {
+            runCatchingExceptions {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+                    saveOnDiskUsingMediaStore(path)
+                } else {
+                    saveOnDiskUsingExternalStorageApi(path)
+                }
+            }.onSuccess {
+                Timber.v("Save on disk succeed")
+                withContext(dispatchers.main) {
+                    context.toast("Save on disk succeed")
+                }
+            }.onFailure {
+                Timber.e(it, "Save on disk failed")
+            }
+        }
+    }
+
+    @RequiresApi(Build.VERSION_CODES.Q)
+    private fun saveOnDiskUsingMediaStore(path: String) {
+        val file = File(path)
+        val contentValues = ContentValues().apply {
+            put(MediaStore.MediaColumns.DISPLAY_NAME, file.name)
+            put(MediaStore.MediaColumns.MIME_TYPE, MimeTypes.OctetStream)
+            put(MediaStore.MediaColumns.RELATIVE_PATH, Environment.DIRECTORY_DOWNLOADS)
+        }
+        val resolver = context.contentResolver
+        val outputUri = resolver.insert(MediaStore.Downloads.EXTERNAL_CONTENT_URI, contentValues)
+        if (outputUri != null) {
+            file.inputStream().use { input ->
+                resolver.openOutputStream(outputUri).use { output ->
+                    input.copyTo(output!!, DEFAULT_BUFFER_SIZE)
+                }
+            }
+        }
+    }
+
+    private fun saveOnDiskUsingExternalStorageApi(path: String) {
+        val file = File(path)
+        val target = File(
+            Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS),
+            file.name
+        )
+        file.inputStream().use { input ->
+            FileOutputStream(target).use { output ->
+                input.copyTo(output)
+            }
+        }
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/FileShare.kt

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import androidx.core.content.FileProvider
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.ContributesBinding
+import io.element.android.libraries.core.coroutine.CoroutineDispatchers
+import io.element.android.libraries.core.extensions.runCatchingExceptions
+import io.element.android.libraries.core.meta.BuildMeta
+import io.element.android.libraries.core.mimetype.MimeTypes
+import io.element.android.libraries.di.annotations.ApplicationContext
+import kotlinx.coroutines.withContext
+import timber.log.Timber
+import java.io.File
+
+interface FileShare {
+    suspend fun share(
+        path: String
+    )
+}
+
+@ContributesBinding(AppScope::class)
+class DefaultFileShare(
+    @ApplicationContext private val context: Context,
+    private val dispatchers: CoroutineDispatchers,
+    private val buildMeta: BuildMeta,
+) : FileShare {
+    override suspend fun share(
+        path: String,
+    ) {
+        runCatchingExceptions {
+            val file = File(path)
+            val shareableUri = file.toShareableUri()
+            val shareMediaIntent = Intent(Intent.ACTION_SEND)
+                .setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+                .putExtra(Intent.EXTRA_STREAM, shareableUri)
+                .setTypeAndNormalize(MimeTypes.OctetStream)
+            withContext(dispatchers.main) {
+                val intent = Intent.createChooser(shareMediaIntent, null)
+                intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                context.startActivity(intent)
+            }
+        }.onSuccess {
+            Timber.v("Share file succeed")
+        }.onFailure {
+            Timber.e(it, "Share file failed")
+        }
+    }
+
+    private fun File.toShareableUri(): Uri {
+        val authority = "${buildMeta.applicationId}.fileprovider"
+        return FileProvider.getUriForFile(context, authority, this).normalizeScheme()
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/ViewFileEvents.kt

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+sealed interface ViewFileEvents {
+    data object SaveOnDisk : ViewFileEvents
+    data object Share : ViewFileEvents
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/ViewFileNode.kt

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.core.node.Node
+import com.bumble.appyx.core.plugin.Plugin
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.Assisted
+import dev.zacsweers.metro.AssistedInject
+import io.element.android.annotations.ContributesNode
+import io.element.android.libraries.architecture.NodeInputs
+import io.element.android.libraries.architecture.callback
+import io.element.android.libraries.architecture.inputs
+
+@ContributesNode(AppScope::class)
+@AssistedInject
+class ViewFileNode(
+    @Assisted buildContext: BuildContext,
+    @Assisted plugins: List<Plugin>,
+    presenterFactory: ViewFilePresenter.Factory,
+) : Node(buildContext, plugins = plugins) {
+    data class Inputs(
+        val path: String,
+        val name: String,
+    ) : NodeInputs
+
+    interface Callback : Plugin {
+        fun onBackClick()
+    }
+
+    private val callback: Callback = callback()
+    private val inputs: Inputs = inputs()
+
+    private val presenter = presenterFactory.create(
+        path = inputs.path,
+        name = inputs.name,
+    )
+
+    @Composable
+    override fun View(modifier: Modifier) {
+        val state = presenter.present()
+        ViewFileView(
+            state = state,
+            modifier = modifier,
+            onBackClick = callback::onBackClick,
+        )
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/ViewFilePresenter.kt

@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import dev.zacsweers.metro.Assisted
+import dev.zacsweers.metro.AssistedFactory
+import dev.zacsweers.metro.AssistedInject
+import io.element.android.libraries.architecture.AsyncData
+import io.element.android.libraries.architecture.Presenter
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.launch
+
+@AssistedInject
+class ViewFilePresenter(
+    @Assisted("path") val path: String,
+    @Assisted("name") val name: String,
+    private val fileContentReader: FileContentReader,
+    private val fileShare: FileShare,
+    private val fileSave: FileSave,
+) : Presenter<ViewFileState> {
+    @AssistedFactory
+    interface Factory {
+        fun create(
+            @Assisted("path") path: String,
+            @Assisted("name") name: String,
+        ): ViewFilePresenter
+    }
+
+    @Composable
+    override fun present(): ViewFileState {
+        val coroutineScope = rememberCoroutineScope()
+        val colorationMode = remember { name.toColorationMode() }
+
+        fun handleEvent(event: ViewFileEvents) {
+            when (event) {
+                ViewFileEvents.Share -> coroutineScope.share(path)
+                ViewFileEvents.SaveOnDisk -> coroutineScope.save(path)
+            }
+        }
+
+        var lines: AsyncData<List<String>> by remember { mutableStateOf(AsyncData.Loading()) }
+        LaunchedEffect(Unit) {
+            lines = fileContentReader.getLines(path).fold(
+                onSuccess = { AsyncData.Success(it) },
+                onFailure = { AsyncData.Failure(it) }
+            )
+        }
+        return ViewFileState(
+            name = name,
+            lines = lines,
+            colorationMode = colorationMode,
+            eventSink = ::handleEvent,
+        )
+    }
+
+    private fun CoroutineScope.share(path: String) = launch {
+        fileShare.share(path)
+    }
+
+    private fun CoroutineScope.save(path: String) = launch {
+        fileSave.save(path)
+    }
+}
+
+private fun String.toColorationMode(): ColorationMode {
+    return when {
+        equals("logcat.log") -> ColorationMode.Logcat
+        startsWith("logs.") -> ColorationMode.RustLogs
+        else -> ColorationMode.None
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/ViewFileState.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import io.element.android.libraries.architecture.AsyncData
+
+data class ViewFileState(
+    val name: String,
+    val lines: AsyncData<List<String>>,
+    val colorationMode: ColorationMode,
+    val eventSink: (ViewFileEvents) -> Unit,
+)
+
+enum class ColorationMode {
+    Logcat,
+    RustLogs,
+    None,
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/ViewFileStateProvider.kt

@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import androidx.compose.ui.tooling.preview.PreviewParameterProvider
+import io.element.android.libraries.architecture.AsyncData
+
+open class ViewFileStateProvider : PreviewParameterProvider<ViewFileState> {
+    override val values: Sequence<ViewFileState>
+        get() = sequenceOf(
+            aViewFileState(),
+            aViewFileState(lines = AsyncData.Loading()),
+            aViewFileState(lines = AsyncData.Failure(Exception("A failure"))),
+            aViewFileState(lines = AsyncData.Success(emptyList())),
+            aViewFileState(
+                name = "logcat.log",
+                lines = AsyncData.Success(
+                    listOf(
+                        "Line 1",
+                        "Line 2",
+                        "Line 3 lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor" +
+                            " incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,",
+                        "01-23 13:14:50.740 25818 25818 V verbose",
+                        "01-23 13:14:50.740 25818 25818 D debug",
+                        "01-23 13:14:50.740 25818 25818 I info",
+                        "01-23 13:14:50.740 25818 25818 W warning",
+                        "01-23 13:14:50.740 25818 25818 E error",
+                        "01-23 13:14:50.740 25818 25818 A assertion",
+                    )
+                ),
+                colorationMode = ColorationMode.Logcat,
+            ),
+            aViewFileState(
+                name = "logs.2024-01-26",
+                lines = AsyncData.Success(
+                    listOf(
+                        "Line 1",
+                        "Line 2",
+                        "Line 3 lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor" +
+                            " incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,",
+                        "2024-01-26T10:22:26.947416Z TRACE trace",
+                        "2024-01-26T10:22:26.947416Z DEBUG debug",
+                        "2024-01-26T10:22:26.947416Z  INFO info",
+                        "2024-01-26T10:22:26.947416Z  WARN warn",
+                        "2024-01-26T10:22:26.947416Z ERROR error",
+                    )
+                ),
+                colorationMode = ColorationMode.RustLogs,
+            )
+        )
+}
+
+fun aViewFileState(
+    name: String = "aName",
+    lines: AsyncData<List<String>> = AsyncData.Uninitialized,
+    colorationMode: ColorationMode = ColorationMode.None,
+) = ViewFileState(
+    name = name,
+    lines = lines,
+    colorationMode = colorationMode,
+    eventSink = {},
+)

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/file/ViewFileView.kt

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.file
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.consumeWindowInsets
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.PreviewParameter
+import io.element.android.compound.tokens.generated.CompoundIcons
+import io.element.android.libraries.architecture.AsyncData
+import io.element.android.libraries.designsystem.components.async.AsyncFailure
+import io.element.android.libraries.designsystem.components.async.AsyncLoading
+import io.element.android.libraries.designsystem.components.button.BackButton
+import io.element.android.libraries.designsystem.preview.ElementPreview
+import io.element.android.libraries.designsystem.preview.PreviewsDayNight
+import io.element.android.libraries.designsystem.theme.components.Icon
+import io.element.android.libraries.designsystem.theme.components.IconButton
+import io.element.android.libraries.designsystem.theme.components.Scaffold
+import io.element.android.libraries.designsystem.theme.components.TopAppBar
+import io.element.android.libraries.ui.strings.CommonStrings
+import kotlinx.collections.immutable.toImmutableList
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ViewFileView(
+    state: ViewFileState,
+    onBackClick: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Scaffold(
+        modifier = modifier,
+        topBar = {
+            TopAppBar(
+                navigationIcon = {
+                    BackButton(onClick = onBackClick)
+                },
+                titleStr = state.name,
+                actions = {
+                    IconButton(
+                        onClick = {
+                            state.eventSink(ViewFileEvents.Share)
+                        },
+                    ) {
+                        Icon(
+                            imageVector = CompoundIcons.ShareAndroid(),
+                            contentDescription = stringResource(id = CommonStrings.action_share),
+                        )
+                    }
+                    IconButton(
+                        onClick = {
+                            state.eventSink(ViewFileEvents.SaveOnDisk)
+                        },
+                    ) {
+                        Icon(
+                            imageVector = CompoundIcons.Download(),
+                            contentDescription = stringResource(id = CommonStrings.action_save),
+                        )
+                    }
+                }
+            )
+        },
+        content = { padding ->
+            Column(
+                modifier = Modifier
+                    .padding(padding)
+                    .consumeWindowInsets(padding)
+            ) {
+                when (state.lines) {
+                    AsyncData.Uninitialized,
+                    is AsyncData.Loading -> AsyncLoading()
+                    is AsyncData.Success -> FileContent(
+                        modifier = Modifier.weight(1f),
+                        lines = state.lines.data.toImmutableList(),
+                        colorationMode = state.colorationMode,
+                    )
+                    is AsyncData.Failure -> AsyncFailure(throwable = state.lines.error, onRetry = null)
+                }
+            }
+        }
+    )
+}
+
+@PreviewsDayNight
+@Composable
+internal fun ViewFileViewPreview(@PreviewParameter(ViewFileStateProvider::class) state: ViewFileState) = ElementPreview {
+    ViewFileView(
+        state = state,
+        onBackClick = {},
+    )
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/folder/FolderExplorer.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.folder
+
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.ContributesBinding
+import io.element.android.features.viewfolder.impl.model.Item
+import io.element.android.libraries.androidutils.filesize.FileSizeFormatter
+import io.element.android.libraries.core.coroutine.CoroutineDispatchers
+import kotlinx.coroutines.withContext
+import java.io.File
+
+interface FolderExplorer {
+    suspend fun getItems(path: String): List<Item>
+}
+
+@ContributesBinding(AppScope::class)
+class DefaultFolderExplorer(
+    private val fileSizeFormatter: FileSizeFormatter,
+    private val dispatchers: CoroutineDispatchers,
+) : FolderExplorer {
+    override suspend fun getItems(path: String): List<Item> = withContext(dispatchers.io) {
+        val current = File(path)
+        if (current.isFile) {
+            error("Not a folder")
+        }
+        val folderContent = current.listFiles().orEmpty().map { file ->
+            if (file.isDirectory) {
+                Item.Folder(
+                    path = file.path,
+                    name = file.name
+                )
+            } else {
+                Item.File(
+                    path = file.path,
+                    name = file.name,
+                    formattedSize = fileSizeFormatter.format(file.length()),
+                )
+            }
+        }
+        buildList {
+            addAll(folderContent.filterIsInstance<Item.Folder>().sortedBy(Item.Folder::name))
+            addAll(folderContent.filterIsInstance<Item.File>().sortedBy(Item.File::name))
+        }
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/folder/ViewFolderNode.kt

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.folder
+
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.core.node.Node
+import com.bumble.appyx.core.plugin.Plugin
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.Assisted
+import dev.zacsweers.metro.AssistedInject
+import io.element.android.annotations.ContributesNode
+import io.element.android.features.viewfolder.impl.model.Item
+import io.element.android.libraries.architecture.NodeInputs
+import io.element.android.libraries.architecture.callback
+import io.element.android.libraries.architecture.inputs
+
+@ContributesNode(AppScope::class)
+@AssistedInject
+class ViewFolderNode(
+    @Assisted buildContext: BuildContext,
+    @Assisted plugins: List<Plugin>,
+    presenterFactory: ViewFolderPresenter.Factory,
+) : Node(buildContext, plugins = plugins) {
+    data class Inputs(
+        val canGoUp: Boolean,
+        val path: String,
+    ) : NodeInputs
+
+    interface Callback : Plugin {
+        fun onBackClick()
+        fun navigateToItem(item: Item)
+    }
+
+    private val callback: Callback = callback()
+    private val inputs: Inputs = inputs()
+
+    private val presenter = presenterFactory.create(
+        canGoUp = inputs.canGoUp,
+        path = inputs.path,
+    )
+
+    @Composable
+    override fun View(modifier: Modifier) {
+        val state = presenter.present()
+        ViewFolderView(
+            state = state,
+            modifier = modifier,
+            onNavigateTo = callback::navigateToItem,
+            onBackClick = callback::onBackClick,
+        )
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/folder/ViewFolderPresenter.kt

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.folder
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import dev.zacsweers.metro.Assisted
+import dev.zacsweers.metro.AssistedFactory
+import dev.zacsweers.metro.AssistedInject
+import io.element.android.features.viewfolder.impl.model.Item
+import io.element.android.libraries.architecture.Presenter
+import io.element.android.libraries.core.meta.BuildMeta
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.persistentListOf
+import kotlinx.collections.immutable.toImmutableList
+
+@AssistedInject
+class ViewFolderPresenter(
+    @Assisted val canGoUp: Boolean,
+    @Assisted val path: String,
+    private val folderExplorer: FolderExplorer,
+    private val buildMeta: BuildMeta,
+) : Presenter<ViewFolderState> {
+    @AssistedFactory
+    interface Factory {
+        fun create(canGoUp: Boolean, path: String): ViewFolderPresenter
+    }
+
+    @Composable
+    override fun present(): ViewFolderState {
+        var content by remember { mutableStateOf<ImmutableList<Item>>(persistentListOf()) }
+        val title = remember {
+            buildString {
+                if (path.contains(buildMeta.applicationId)) {
+                    append("…")
+                }
+                append(path.substringAfter(buildMeta.applicationId))
+            }
+        }
+        LaunchedEffect(Unit) {
+            content = buildList {
+                if (canGoUp) add(Item.Parent)
+                addAll(folderExplorer.getItems(path))
+            }.toImmutableList()
+        }
+        return ViewFolderState(
+            title = title,
+            content = content,
+        )
+    }
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/folder/ViewFolderState.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.folder
+
+import io.element.android.features.viewfolder.impl.model.Item
+import kotlinx.collections.immutable.ImmutableList
+
+data class ViewFolderState(
+    val title: String,
+    val content: ImmutableList<Item>,
+)

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/folder/ViewFolderStateProvider.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.folder
+
+import androidx.compose.ui.tooling.preview.PreviewParameterProvider
+import io.element.android.features.viewfolder.impl.model.Item
+import kotlinx.collections.immutable.toImmutableList
+
+open class ViewFolderStateProvider : PreviewParameterProvider<ViewFolderState> {
+    override val values: Sequence<ViewFolderState>
+        get() = sequenceOf(
+            aViewFolderState(),
+            aViewFolderState(
+                content = listOf(
+                    Item.Parent,
+                    Item.Folder("aPath", "aFolder"),
+                    Item.File("aPath", "aFile", "12kB"),
+                )
+            )
+        )
+}
+
+fun aViewFolderState(
+    title: String = "aPath",
+    content: List<Item> = emptyList(),
+) = ViewFolderState(
+    title = title,
+    content = content.toImmutableList(),
+)

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/folder/ViewFolderView.kt

@@ -0,0 +1,151 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.folder
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.consumeWindowInsets
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.Folder
+import androidx.compose.material.icons.outlined.SubdirectoryArrowLeft
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.tooling.preview.PreviewParameter
+import androidx.compose.ui.unit.dp
+import io.element.android.compound.theme.ElementTheme
+import io.element.android.compound.tokens.generated.CompoundIcons
+import io.element.android.features.viewfolder.impl.model.Item
+import io.element.android.libraries.designsystem.components.button.BackButton
+import io.element.android.libraries.designsystem.components.list.ListItemContent
+import io.element.android.libraries.designsystem.preview.ElementPreview
+import io.element.android.libraries.designsystem.preview.PreviewsDayNight
+import io.element.android.libraries.designsystem.theme.components.IconSource
+import io.element.android.libraries.designsystem.theme.components.ListItem
+import io.element.android.libraries.designsystem.theme.components.Scaffold
+import io.element.android.libraries.designsystem.theme.components.Text
+import io.element.android.libraries.designsystem.theme.components.TopAppBar
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ViewFolderView(
+    state: ViewFolderState,
+    onNavigateTo: (Item) -> Unit,
+    onBackClick: () -> Unit,
+    modifier: Modifier = Modifier,
+) {
+    Scaffold(
+        modifier = modifier,
+        topBar = {
+            TopAppBar(
+                navigationIcon = {
+                    BackButton(onClick = onBackClick)
+                },
+                titleStr = state.title,
+            )
+        },
+        content = { padding ->
+            Column(
+                modifier = Modifier
+                    .padding(padding)
+                    .consumeWindowInsets(padding)
+            ) {
+                LazyColumn(
+                    modifier = Modifier.weight(1f)
+                ) {
+                    items(
+                        items = state.content,
+                    ) { item ->
+                        ItemRow(
+                            item = item,
+                            onItemClick = { onNavigateTo(item) },
+                        )
+                    }
+                    if (state.content.none { it !is Item.Parent }) {
+                        item {
+                            Spacer(Modifier.size(80.dp))
+                            Text(
+                                text = "Empty folder",
+                                textAlign = TextAlign.Center,
+                                color = MaterialTheme.colorScheme.tertiary,
+                                modifier = Modifier.fillMaxWidth()
+                            )
+                        }
+                    }
+                }
+            }
+        }
+    )
+}
+
+@Composable
+private fun ItemRow(
+    item: Item,
+    onItemClick: () -> Unit,
+) {
+    when (item) {
+        Item.Parent -> {
+            ListItem(
+                leadingContent = ListItemContent.Icon(IconSource.Vector(Icons.Outlined.SubdirectoryArrowLeft)),
+                headlineContent = {
+                    Text(
+                        text = "..",
+                        modifier = Modifier.padding(16.dp),
+                        style = ElementTheme.typography.fontBodyMdMedium,
+                    )
+                },
+                onClick = onItemClick,
+            )
+        }
+        is Item.Folder -> {
+            ListItem(
+                leadingContent = ListItemContent.Icon(IconSource.Vector(Icons.Outlined.Folder)),
+                headlineContent = {
+                    Text(
+                        text = item.name,
+                        modifier = Modifier.padding(16.dp),
+                        style = ElementTheme.typography.fontBodyMdMedium,
+                    )
+                },
+                onClick = onItemClick,
+            )
+        }
+        is Item.File -> {
+            ListItem(
+                leadingContent = ListItemContent.Icon(IconSource.Vector(CompoundIcons.Document())),
+                headlineContent = {
+                    Text(
+                        text = item.name,
+                        modifier = Modifier.padding(16.dp),
+                        style = ElementTheme.typography.fontBodyMdMedium,
+                    )
+                },
+                trailingContent = ListItemContent.Text(item.formattedSize),
+                onClick = onItemClick,
+            )
+        }
+    }
+}
+
+@PreviewsDayNight
+@Composable
+internal fun ViewFolderViewPreview(@PreviewParameter(ViewFolderStateProvider::class) state: ViewFolderState) = ElementPreview {
+    ViewFolderView(
+        state = state,
+        onNavigateTo = {},
+        onBackClick = {},
+    )
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/model/Item.kt

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.model
+
+import androidx.compose.runtime.Immutable
+
+@Immutable
+sealed interface Item {
+    data object Parent : Item
+
+    data class Folder(
+        val path: String,
+        val name: String,
+    ) : Item
+
+    data class File(
+        val path: String,
+        val name: String,
+        val formattedSize: String,
+    ) : Item
+}

features/viewfolder/impl/src/main/kotlin/io/element/android/features/viewfolder/impl/root/ViewFolderFlowNode.kt

@@ -0,0 +1,138 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl.root
+
+import android.os.Parcelable
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.core.node.Node
+import com.bumble.appyx.core.plugin.Plugin
+import com.bumble.appyx.navmodel.backstack.BackStack
+import com.bumble.appyx.navmodel.backstack.operation.pop
+import com.bumble.appyx.navmodel.backstack.operation.push
+import dev.zacsweers.metro.AppScope
+import dev.zacsweers.metro.Assisted
+import dev.zacsweers.metro.AssistedInject
+import io.element.android.annotations.ContributesNode
+import io.element.android.features.viewfolder.api.ViewFolderEntryPoint
+import io.element.android.features.viewfolder.impl.file.ViewFileNode
+import io.element.android.features.viewfolder.impl.folder.ViewFolderNode
+import io.element.android.features.viewfolder.impl.model.Item
+import io.element.android.libraries.architecture.BackstackView
+import io.element.android.libraries.architecture.BaseFlowNode
+import io.element.android.libraries.architecture.NodeInputs
+import io.element.android.libraries.architecture.callback
+import io.element.android.libraries.architecture.createNode
+import io.element.android.libraries.architecture.inputs
+import kotlinx.parcelize.Parcelize
+
+@ContributesNode(AppScope::class)
+@AssistedInject
+class ViewFolderFlowNode(
+    @Assisted buildContext: BuildContext,
+    @Assisted plugins: List<Plugin>,
+) : BaseFlowNode<ViewFolderFlowNode.NavTarget>(
+    backstack = BackStack(
+        initialElement = NavTarget.Root,
+        savedStateMap = buildContext.savedStateMap,
+    ),
+    buildContext = buildContext,
+    plugins = plugins
+) {
+    sealed interface NavTarget : Parcelable {
+        @Parcelize
+        data object Root : NavTarget
+
+        @Parcelize
+        data class Folder(
+            val path: String,
+        ) : NavTarget
+
+        @Parcelize
+        data class File(
+            val path: String,
+            val name: String,
+        ) : NavTarget
+    }
+
+    data class Inputs(
+        val rootPath: String,
+    ) : NodeInputs
+
+    private val callback: ViewFolderEntryPoint.Callback = callback()
+    private val inputs: Inputs = inputs()
+
+    override fun resolve(navTarget: NavTarget, buildContext: BuildContext): Node {
+        return when (navTarget) {
+            is NavTarget.Root -> {
+                createViewFolderNode(
+                    buildContext,
+                    inputs = ViewFolderNode.Inputs(
+                        canGoUp = false,
+                        path = inputs.rootPath,
+                    )
+                )
+            }
+            is NavTarget.Folder -> {
+                createViewFolderNode(
+                    buildContext,
+                    inputs = ViewFolderNode.Inputs(
+                        canGoUp = true,
+                        path = navTarget.path,
+                    )
+                )
+            }
+            is NavTarget.File -> {
+                val callback: ViewFileNode.Callback = object : ViewFileNode.Callback {
+                    override fun onBackClick() {
+                        backstack.pop()
+                    }
+                }
+                val inputs = ViewFileNode.Inputs(
+                    path = navTarget.path,
+                    name = navTarget.name,
+                )
+                createNode<ViewFileNode>(buildContext, plugins = listOf(inputs, callback))
+            }
+        }
+    }
+
+    private fun createViewFolderNode(
+        buildContext: BuildContext,
+        inputs: ViewFolderNode.Inputs,
+    ): Node {
+        val callback: ViewFolderNode.Callback = object : ViewFolderNode.Callback {
+            override fun onBackClick() {
+                callback.onDone()
+            }
+
+            override fun navigateToItem(item: Item) {
+                when (item) {
+                    Item.Parent -> {
+                        // Should not happen when in Root since parent is not accessible from root (canGoUp set to false)
+                        backstack.pop()
+                    }
+                    is Item.Folder -> {
+                        backstack.push(NavTarget.Folder(path = item.path))
+                    }
+                    is Item.File -> {
+                        backstack.push(NavTarget.File(path = item.path, name = item.name))
+                    }
+                }
+            }
+        }
+        return createNode<ViewFolderNode>(buildContext, plugins = listOf(inputs, callback))
+    }
+
+    @Composable
+    override fun View(modifier: Modifier) {
+        BackstackView()
+    }
+}

features/viewfolder/impl/src/test/kotlin/io/element/android/features/viewfolder/impl/DefaultViewFolderEntryPointTest.kt

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.impl
+
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.testing.junit4.util.MainDispatcherRule
+import com.google.common.truth.Truth.assertThat
+import io.element.android.features.viewfolder.api.ViewFolderEntryPoint
+import io.element.android.features.viewfolder.impl.root.ViewFolderFlowNode
+import io.element.android.tests.testutils.lambda.lambdaError
+import io.element.android.tests.testutils.node.TestParentNode
+import org.junit.Rule
+import org.junit.Test
+
+class DefaultViewFolderEntryPointTest {
+    @get:Rule
+    val instantTaskExecutorRule = InstantTaskExecutorRule()
+
+    @get:Rule
+    val mainDispatcherRule = MainDispatcherRule()
+
+    @Test
+    fun `test node builder`() {
+        val entryPoint = DefaultViewFolderEntryPoint()
+        val parentNode = TestParentNode.create { buildContext, plugins ->
+            ViewFolderFlowNode(
+                buildContext = buildContext,
+                plugins = plugins,
+            )
+        }
+        val callback = object : ViewFolderEntryPoint.Callback {
+            override fun onDone() = lambdaError()
+        }
+        val params = ViewFolderEntryPoint.Params(
+            rootPath = "path",
+        )
+        val result = entryPoint.createNode(
+            parentNode = parentNode,
+            buildContext = BuildContext.root(null),
+            params = params,
+            callback = callback,
+        )
+        assertThat(result).isInstanceOf(ViewFolderFlowNode::class.java)
+        assertThat(result.plugins).contains(ViewFolderFlowNode.Inputs(params.rootPath))
+        assertThat(result.plugins).contains(callback)
+    }
+}

features/viewfolder/impl/src/test/kotlin/io/element/android/features/viewfolder/test/file/FakeFileContentReader.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.test.file
+
+import io.element.android.features.viewfolder.impl.file.FileContentReader
+
+class FakeFileContentReader : FileContentReader {
+    private var result: Result<List<String>> = Result.success(emptyList())
+
+    fun givenResult(result: Result<List<String>>) {
+        this.result = result
+    }
+
+    override suspend fun getLines(path: String): Result<List<String>> = result
+}

features/viewfolder/impl/src/test/kotlin/io/element/android/features/viewfolder/test/file/FakeFileSave.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.test.file
+
+import io.element.android.features.viewfolder.impl.file.FileSave
+
+class FakeFileSave : FileSave {
+    var hasBeenCalled = false
+        private set
+
+    override suspend fun save(path: String) {
+        hasBeenCalled = true
+    }
+}

features/viewfolder/impl/src/test/kotlin/io/element/android/features/viewfolder/test/file/FakeFileShare.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.test.file
+
+import io.element.android.features.viewfolder.impl.file.FileShare
+
+class FakeFileShare : FileShare {
+    var hasBeenCalled = false
+        private set
+
+    override suspend fun share(path: String) {
+        hasBeenCalled = true
+    }
+}

features/viewfolder/impl/src/test/kotlin/io/element/android/features/viewfolder/test/file/ViewFilePresenterTest.kt

@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.test.file
+
+import app.cash.molecule.RecompositionMode
+import app.cash.molecule.moleculeFlow
+import app.cash.turbine.test
+import com.google.common.truth.Truth.assertThat
+import io.element.android.features.viewfolder.impl.file.ColorationMode
+import io.element.android.features.viewfolder.impl.file.FileContentReader
+import io.element.android.features.viewfolder.impl.file.FileSave
+import io.element.android.features.viewfolder.impl.file.FileShare
+import io.element.android.features.viewfolder.impl.file.ViewFileEvents
+import io.element.android.features.viewfolder.impl.file.ViewFilePresenter
+import io.element.android.libraries.architecture.AsyncData
+import io.element.android.libraries.matrix.test.AN_EXCEPTION
+import io.element.android.tests.testutils.WarmUpRule
+import kotlinx.coroutines.test.runTest
+import org.junit.Rule
+import org.junit.Test
+
+class ViewFilePresenterTest {
+    @get:Rule
+    val warmUpRule = WarmUpRule()
+
+    @Test
+    fun `present - initial state`() = runTest {
+        val fileContentReader = FakeFileContentReader().apply {
+            givenResult(Result.success(listOf("aLine")))
+        }
+        val presenter = createPresenter(fileContentReader = fileContentReader)
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            val initialState = awaitItem()
+            assertThat(initialState.name).isEqualTo("aName")
+            assertThat(initialState.lines).isInstanceOf(AsyncData.Loading::class.java)
+            assertThat(initialState.colorationMode).isEqualTo(ColorationMode.None)
+            val loadedState = awaitItem()
+            val lines = (loadedState.lines as AsyncData.Success).data
+            assertThat(lines.size).isEqualTo(1)
+            assertThat(lines.first()).isEqualTo("aLine")
+        }
+    }
+
+    @Test
+    fun `present - coloration mode for logcat`() = runTest {
+        val presenter = createPresenter(name = "logcat.log")
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            val initialState = awaitItem()
+            assertThat(initialState.colorationMode).isEqualTo(ColorationMode.Logcat)
+            cancelAndConsumeRemainingEvents()
+        }
+    }
+
+    @Test
+    fun `present - coloration mode for logs`() = runTest {
+        val presenter = createPresenter(name = "logs.date")
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            val initialState = awaitItem()
+            assertThat(initialState.colorationMode).isEqualTo(ColorationMode.RustLogs)
+            cancelAndConsumeRemainingEvents()
+        }
+    }
+
+    @Test
+    fun `present - share should not have any side effect`() = runTest {
+        val fileContentReader = FakeFileContentReader().apply {
+            givenResult(Result.success(listOf("aLine")))
+        }
+        val fileShare = FakeFileShare()
+        val fileSave = FakeFileSave()
+        val presenter = createPresenter(fileContentReader = fileContentReader, fileShare = fileShare, fileSave = fileSave)
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            skipItems(1)
+            val initialState = awaitItem()
+            initialState.eventSink(ViewFileEvents.Share)
+            assertThat(fileShare.hasBeenCalled).isTrue()
+            assertThat(fileSave.hasBeenCalled).isFalse()
+        }
+    }
+
+    @Test
+    fun `present - with error loading file`() = runTest {
+        val fileContentReader = FakeFileContentReader().apply {
+            givenResult(Result.failure(AN_EXCEPTION))
+        }
+        val presenter = createPresenter(fileContentReader = fileContentReader)
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            skipItems(1)
+            val errorState = awaitItem()
+            assertThat(errorState.lines).isInstanceOf(AsyncData.Failure::class.java)
+        }
+    }
+
+    @Test
+    fun `present - save should not have any side effect`() = runTest {
+        val fileContentReader = FakeFileContentReader().apply {
+            givenResult(Result.success(listOf("aLine")))
+        }
+        val fileShare = FakeFileShare()
+        val fileSave = FakeFileSave()
+        val presenter = createPresenter(fileContentReader = fileContentReader, fileShare = fileShare, fileSave = fileSave)
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            skipItems(1)
+            val initialState = awaitItem()
+            initialState.eventSink(ViewFileEvents.SaveOnDisk)
+            assertThat(fileShare.hasBeenCalled).isFalse()
+            assertThat(fileSave.hasBeenCalled).isTrue()
+        }
+    }
+
+    private fun createPresenter(
+        path: String = "aPath",
+        name: String = "aName",
+        fileContentReader: FileContentReader = FakeFileContentReader(),
+        fileShare: FileShare = FakeFileShare(),
+        fileSave: FileSave = FakeFileSave(),
+    ) = ViewFilePresenter(
+        path = path,
+        name = name,
+        fileContentReader = fileContentReader,
+        fileShare = fileShare,
+        fileSave = fileSave,
+    )
+}

features/viewfolder/impl/src/test/kotlin/io/element/android/features/viewfolder/test/folder/FakeFolderExplorer.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.test.folder
+
+import io.element.android.features.viewfolder.impl.folder.FolderExplorer
+import io.element.android.features.viewfolder.impl.model.Item
+
+class FakeFolderExplorer : FolderExplorer {
+    private var result: List<Item> = emptyList()
+
+    fun givenResult(result: List<Item>) {
+        this.result = result
+    }
+
+    override suspend fun getItems(path: String): List<Item> = result
+}

features/viewfolder/impl/src/test/kotlin/io/element/android/features/viewfolder/test/folder/ViewFolderPresenterTest.kt

@@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2024, 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.test.folder
+
+import app.cash.molecule.RecompositionMode
+import app.cash.molecule.moleculeFlow
+import app.cash.turbine.test
+import com.google.common.truth.Truth.assertThat
+import io.element.android.features.viewfolder.impl.folder.FolderExplorer
+import io.element.android.features.viewfolder.impl.folder.ViewFolderPresenter
+import io.element.android.features.viewfolder.impl.model.Item
+import io.element.android.libraries.core.meta.BuildMeta
+import io.element.android.libraries.matrix.test.core.aBuildMeta
+import io.element.android.tests.testutils.WarmUpRule
+import io.element.android.tests.testutils.test
+import kotlinx.coroutines.test.runTest
+import org.junit.Rule
+import org.junit.Test
+
+class ViewFolderPresenterTest {
+    @get:Rule
+    val warmUpRule = WarmUpRule()
+
+    @Test
+    fun `present - initial state`() = runTest {
+        val presenter = createPresenter()
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            val initialState = awaitItem()
+            assertThat(initialState.title).isEqualTo("aPath")
+            assertThat(initialState.content).isEmpty()
+        }
+    }
+
+    @Test
+    fun `present - title is built regarding the applicationId`() = runTest {
+        val presenter = createPresenter(
+            path = "/data/user/O/appId/cache/logs",
+            buildMeta = aBuildMeta(
+                applicationId = "appId",
+            )
+        )
+        presenter.test {
+            val initialState = awaitItem()
+            assertThat(initialState.title).isEqualTo("…/cache/logs")
+        }
+    }
+
+    @Test
+    fun `present - list items from root`() = runTest {
+        val items = listOf(
+            Item.Folder("aFilePath", "aFilename"),
+            Item.File("aFolderPath", "aFolderName", "aSize"),
+        )
+        val folderExplorer = FakeFolderExplorer().apply {
+            givenResult(items)
+        }
+        val presenter = createPresenter(folderExplorer = folderExplorer)
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            skipItems(1)
+            val initialState = awaitItem()
+            assertThat(initialState.title).isEqualTo("aPath")
+            assertThat(initialState.content.toList()).isEqualTo(items)
+        }
+    }
+
+    @Test
+    fun `present - list items from a folder`() = runTest {
+        val items = listOf(
+            Item.Folder("aFilePath", "aFilename"),
+            Item.File("aFolderPath", "aFolderName", "aSize"),
+        )
+        val folderExplorer = FakeFolderExplorer().apply {
+            givenResult(items)
+        }
+        val presenter = createPresenter(
+            canGoUp = true,
+            folderExplorer = folderExplorer
+        )
+        moleculeFlow(RecompositionMode.Immediate) {
+            presenter.present()
+        }.test {
+            skipItems(1)
+            val initialState = awaitItem()
+            assertThat(initialState.title).isEqualTo("aPath")
+            assertThat(initialState.content.toList()).isEqualTo(listOf(Item.Parent) + items)
+        }
+    }
+
+    private fun createPresenter(
+        canGoUp: Boolean = false,
+        path: String = "aPath",
+        folderExplorer: FolderExplorer = FakeFolderExplorer(),
+        buildMeta: BuildMeta = aBuildMeta(
+            applicationId = "appId",
+        ),
+    ) = ViewFolderPresenter(
+        path = path,
+        canGoUp = canGoUp,
+        folderExplorer = folderExplorer,
+        buildMeta = buildMeta,
+    )
+}

features/viewfolder/test/build.gradle.kts

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+plugins {
+    id("io.element.android-library")
+}
+
+android {
+    namespace = "io.element.android.features.viewfolder.test"
+}
+
+dependencies {
+    implementation(projects.features.viewfolder.api)
+    implementation(projects.libraries.architecture)
+    implementation(projects.tests.testutils)
+}

features/viewfolder/test/src/main/kotlin/io/element/android/features/viewfolder/test/FakeViewFolderEntryPoint.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2025 Element Creations Ltd.
+ * Copyright 2025 New Vector Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.features.viewfolder.test
+
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.core.node.Node
+import io.element.android.features.viewfolder.api.ViewFolderEntryPoint
+import io.element.android.tests.testutils.lambda.lambdaError
+
+class FakeViewFolderEntryPoint : ViewFolderEntryPoint {
+    override fun createNode(
+        parentNode: Node,
+        buildContext: BuildContext,
+        params: ViewFolderEntryPoint.Params,
+        callback: ViewFolderEntryPoint.Callback,
+    ): Node = lambdaError()
+}