feat: Add import functionality

app/src/main/java/app/myzel394/alibi/db/AppSettings.kt

@@ -5,7 +5,6 @@ import android.os.Build
 import android.util.Log
 import com.arthenica.ffmpegkit.FFmpegKit
 import com.arthenica.ffmpegkit.ReturnCode
-import kotlinx.coroutines.delay
 import kotlinx.serialization.Serializable
 import org.json.JSONObject
 import java.io.File
@@ -52,6 +51,19 @@ data class AppSettings(
         )
     }
 
+    fun exportToString(): String {
+        return JSONObject(
+            mapOf(
+                "_meta" to mapOf(
+                    "version" to 1,
+                    "date" to LocalDateTime.now().format(ISO_DATE_TIME),
+                    "app" to "app.myzel394.alibi",
+                ),
+                "data" to toJSONObject(),
+            )
+        ).toString(0)
+    }
+
     companion object {
         fun getDefaultInstance(): AppSettings = AppSettings()
 
@@ -63,6 +75,11 @@ data class AppSettings(
                 theme = Theme.valueOf(data.getString("theme")),
             )
         }
+
+        fun fromExportedString(data: String): AppSettings {
+            val json = JSONObject(data)
+            return fromJSONObject(json.getJSONObject("data"))
+        }
     }
 }
 

app/src/main/java/app/myzel394/alibi/ui/components/SettingsScreen/atoms/ImportExport.kt

@@ -6,27 +6,118 @@ import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.size
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Check
+import androidx.compose.material.icons.filled.CheckCircle
 import androidx.compose.material.icons.filled.Download
 import androidx.compose.material.icons.filled.Upload
+import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
 import androidx.compose.material3.ButtonDefaults
 import androidx.compose.material3.Icon
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+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 androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import app.myzel394.alibi.R
+import app.myzel394.alibi.dataStore
+import app.myzel394.alibi.db.AppSettings
+import app.myzel394.alibi.ui.utils.rememberFileSaverDialog
+import app.myzel394.alibi.ui.utils.rememberFileSelectorDialog
+import kotlinx.coroutines.launch
+import java.io.File
 
 @Composable
 fun ImportExport() {
+    val context = LocalContext.current
+
+    val scope = rememberCoroutineScope()
+    val dataStore = LocalContext.current.dataStore
+    val settings = dataStore
+        .data
+        .collectAsState(initial = AppSettings.getDefaultInstance())
+        .value
+
+    var settingsToBeImported by remember { mutableStateOf<AppSettings?>(null) }
+
+    val saveFile = rememberFileSaverDialog("application/json")
+    val openFile = rememberFileSelectorDialog { uri ->
+        val file = File.createTempFile("alibi_settings", ".json")
+
+        context.contentResolver.openInputStream(uri)!!.use {
+            it.copyTo(file.outputStream())
+        }
+        val rawContent = file.readText()
+
+        settingsToBeImported = AppSettings.fromExportedString(rawContent)
+    }
+
+    if (settingsToBeImported != null) {
+        AlertDialog(
+            onDismissRequest = {
+                settingsToBeImported = null
+            },
+            title = {
+                Text(stringResource(R.string.ui_settings_option_import_label))
+            },
+            text = {
+                Text(stringResource(R.string.ui_settings_option_import_dialog_text))
+            },
+            icon = {
+                Icon(
+                    Icons.Default.Download,
+                    contentDescription = null,
+                )
+            },
+            confirmButton = {
+                Button(
+                    onClick = {
+                        scope.launch {
+                            dataStore.updateData {
+                                settingsToBeImported!!
+                            }
+                            settingsToBeImported = null
+                        }
+                    },
+                ) {
+                    Icon(
+                        Icons.Default.CheckCircle,
+                        contentDescription = null,
+                        modifier = Modifier.size(ButtonDefaults.IconSize),
+                    )
+                    Spacer(modifier = Modifier.size(ButtonDefaults.IconSpacing))
+                    Text(stringResource(R.string.ui_settings_option_import_dialog_confirm))
+                }
+            },
+            dismissButton = {
+                Button(
+                    onClick = {
+                        settingsToBeImported = null
+                    },
+                    colors = ButtonDefaults.textButtonColors(),
+                ) {
+                    Text(stringResource(R.string.dialog_close_cancel_label))
+                }
+            },
+        )
+    }
+
     Row(
         horizontalArrangement = Arrangement.SpaceEvenly,
         verticalAlignment = Alignment.CenterVertically,
         modifier = Modifier.fillMaxWidth(),
     ) {
         Button(
-            onClick = { /*TODO*/ },
+            onClick = {
+                openFile("application/json")
+            },
             colors = ButtonDefaults.filledTonalButtonColors(),
         ) {
             Icon(
@@ -38,7 +129,14 @@ fun ImportExport() {
             Text(stringResource(R.string.ui_settings_option_import_label))
         }
         Button(
-            onClick = { /*TODO*/ },
+            onClick = {
+                val rawContent = settings.exportToString()
+
+                val tempFile = File.createTempFile("alibi_settings", ".json")
+                tempFile.writeText(rawContent)
+
+                saveFile(tempFile, "alibi_settings.json")
+            },
             colors = ButtonDefaults.filledTonalButtonColors(),
         ) {
             Icon(

app/src/main/java/app/myzel394/alibi/ui/screens/AudioRecorder.kt

@@ -64,7 +64,7 @@ fun AudioRecorder(
                 try {
                     val file = audioRecorder.lastRecording!!.concatenateFiles()
 
-                    saveFile(file)
+                    saveFile(file, file.name)
                 } catch (error: Exception) {
                     Log.getStackTraceString(error)
                 } finally {

app/src/main/java/app/myzel394/alibi/ui/utils/file.kt

@@ -1,20 +1,24 @@
 package app.myzel394.alibi.ui.utils
 
+import android.net.Uri
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.platform.LocalContext
 import java.io.File
 
 @Composable
-fun rememberFileSaverDialog(mimeType: String): ((File) -> Unit) {
+fun rememberFileSaverDialog(mimeType: String): ((File, String) -> Unit) {
     val context = LocalContext.current
 
     var file = remember { mutableStateOf<File?>(null) }
 
-    val launcher = rememberLauncherForActivityResult(ActivityResultContracts.CreateDocument(mimeType)) {
+    val launcher =
+        rememberLauncherForActivityResult(ActivityResultContracts.CreateDocument(mimeType)) {
             it?.let {
                 context.contentResolver.openOutputStream(it)?.use { outputStream ->
                     file.value!!.inputStream().use { inputStream ->
@@ -26,8 +30,24 @@ fun rememberFileSaverDialog(mimeType: String): ((File) -> Unit) {
             file.value = null
         }
 
-    return {
+    return { it, name ->
         file.value = it
-        launcher.launch(it.name)
+        launcher.launch(name ?: it.name)
+    }
+}
+
+@Composable
+fun rememberFileSelectorDialog(
+    callback: (Uri) -> Unit
+): ((String) -> Unit) {
+    val launcher =
+        rememberLauncherForActivityResult(ActivityResultContracts.OpenDocument()) {
+            if (it != null) {
+                callback(it)
+            }
+        }
+
+    return { mimeType ->
+        launcher.launch(arrayOf(mimeType))
     }
 }

app/src/main/res/values/strings.xml

@@ -65,4 +65,6 @@
     <string name="ui_settings_language_update_label">Change</string>
     <string name="ui_settings_option_import_label">Import Settings</string>
     <string name="ui_settings_option_export_label">Export Settings</string>
+    <string name="ui_settings_option_import_dialog_text">Are you sure you want to import these settings? Your current settings will be overwritten!</string>
+    <string name="ui_settings_option_import_dialog_confirm">Import settings</string>
 </resources>