Add export OPML file feature and fix ksoap2 XmlPullParser confusion

app/build.gradle

@@ -53,6 +53,7 @@ android {
 }
 
 dependencies {
+    implementation 'be.ceau:opml-parser:2.2.0'
     implementation "androidx.profileinstaller:profileinstaller:1.2.0-alpha02"
     implementation("io.coil-kt:coil-compose:2.0.0-rc02")
     implementation("androidx.compose.animation:animation-graphics:$compose_version")

app/proguard-rules.pro

@@ -25,3 +25,8 @@
 # Disable ServiceLoader reproducibility-breaking optimizations
 -keep class kotlinx.coroutines.CoroutineExceptionHandler
 -keep class kotlinx.coroutines.internal.MainDispatcherFactory
+
+# ksoap2 XmlPullParser confusion
+-dontwarn org.xmlpull.v1.XmlPullParser
+-dontwarn org.xmlpull.v1.XmlSerializer
+-keep class org.xmlpull.v1.* {*;}

app/src/main/java/me/ash/reader/MainActivity.kt

@@ -1,9 +1,11 @@
 package me.ash.reader
 
 import android.os.Bundle
+import android.util.Log
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.core.view.WindowCompat
+import androidx.profileinstaller.ProfileInstallerInitializer
 import dagger.hilt.android.AndroidEntryPoint
 import me.ash.reader.ui.page.common.HomeEntry
 
@@ -13,6 +15,7 @@ class MainActivity : ComponentActivity() {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         WindowCompat.setDecorFitsSystemWindows(window, false)
+        Log.i("RLog", "onCreate: ${ProfileInstallerInitializer().create(this)}")
         setContent {
             HomeEntry(intent.extras).also {
                 intent.replaceExtras(null)

app/src/main/java/me/ash/reader/data/group/GroupDao.kt

@@ -20,7 +20,16 @@ interface GroupDao {
         WHERE accountId = :accountId
         """
     )
-    fun queryAllGroupWithFeed(accountId: Int): Flow<MutableList<GroupWithFeed>>
+    fun queryAllGroupWithFeedAsFlow(accountId: Int): Flow<MutableList<GroupWithFeed>>
+
+    @Transaction
+    @Query(
+        """
+        SELECT * FROM `group`
+        WHERE accountId = :accountId
+        """
+    )
+    fun queryAllGroupWithFeed(accountId: Int): List<GroupWithFeed>
 
     @Query(
         """

app/src/main/java/me/ash/reader/data/repository/AbstractRssRepository.kt

@@ -63,7 +63,7 @@ abstract class AbstractRssRepository constructor(
     }
 
     fun pullFeeds(): Flow<MutableList<GroupWithFeed>> {
-        return groupDao.queryAllGroupWithFeed(context.currentAccountId).flowOn(Dispatchers.IO)
+        return groupDao.queryAllGroupWithFeedAsFlow(context.currentAccountId).flowOn(Dispatchers.IO)
     }
 
     fun pullArticles(

app/src/main/java/me/ash/reader/data/repository/OpmlRepository.kt

@@ -1,16 +1,29 @@
 package me.ash.reader.data.repository
 
+import android.content.Context
 import android.util.Log
+import be.ceau.opml.OpmlWriter
+import be.ceau.opml.entity.Body
+import be.ceau.opml.entity.Head
+import be.ceau.opml.entity.Opml
+import be.ceau.opml.entity.Outline
+import dagger.hilt.android.qualifiers.ApplicationContext
+import me.ash.reader.currentAccountId
+import me.ash.reader.data.account.AccountDao
 import me.ash.reader.data.feed.Feed
 import me.ash.reader.data.feed.FeedDao
 import me.ash.reader.data.group.GroupDao
 import me.ash.reader.data.source.OpmlLocalDataSource
 import java.io.InputStream
+import java.util.*
 import javax.inject.Inject
 
 class OpmlRepository @Inject constructor(
+    @ApplicationContext
+    private val context: Context,
     private val groupDao: GroupDao,
     private val feedDao: FeedDao,
+    private val accountDao: AccountDao,
     private val rssRepository: RssRepository,
     private val opmlLocalDataSource: OpmlLocalDataSource
 ) {
@@ -36,4 +49,45 @@ class OpmlRepository @Inject constructor(
             Log.e("saveToDatabase", "${e.message}")
         }
     }
+
+    suspend fun saveToString(): String? =
+        try {
+            val defaultGroup = groupDao.queryById(opmlLocalDataSource.getDefaultGroupId())!!
+            OpmlWriter().write(
+                Opml(
+                    "2.0",
+                    Head(
+                        accountDao.queryById(context.currentAccountId).name,
+                        Date().toString(), null, null, null,
+                        null, null, null, null,
+                        null, null, null, null,
+                    ),
+                    Body(groupDao.queryAllGroupWithFeed(context.currentAccountId).map {
+                        Outline(
+                            mapOf(
+                                "text" to it.group.name,
+                                "title" to it.group.name,
+                                "isDefault" to (it.group.id == defaultGroup.id).toString()
+                            ),
+                            it.feeds.map { feed ->
+                                Outline(
+                                    mapOf(
+                                        "text" to feed.name,
+                                        "title" to feed.name,
+                                        "xmlUrl" to feed.url,
+                                        "htmlUrl" to feed.url,
+                                        "isNotification" to feed.isNotification.toString(),
+                                        "isFullContent" to feed.isFullContent.toString(),
+                                    ),
+                                    listOf()
+                                )
+                            }
+                        )
+                    })
+                )
+            )
+        } catch (e: Exception) {
+            Log.e("saveToString", "${e.message}")
+            null
+        }
 }

app/src/main/java/me/ash/reader/data/source/OpmlLocalDataSource.kt

@@ -1,15 +1,13 @@
 package me.ash.reader.data.source
 
 import android.content.Context
-import android.util.Log
+import be.ceau.opml.OpmlParser
-import android.util.Xml
 import dagger.hilt.android.qualifiers.ApplicationContext
 import me.ash.reader.*
 import me.ash.reader.data.feed.Feed
 import me.ash.reader.data.group.Group
 import me.ash.reader.data.group.GroupWithFeed
 import me.ash.reader.data.repository.StringsRepository
-import org.xmlpull.v1.XmlPullParser
 import java.io.InputStream
 import java.util.*
 import javax.inject.Inject
@@ -29,59 +27,78 @@ class OpmlLocalDataSource @Inject constructor(
 
     //    @Throws(XmlPullParserException::class, IOException::class)
     fun parseFileInputStream(inputStream: InputStream, defaultGroup: Group): List<GroupWithFeed> {
-        val groupWithFeedList = mutableListOf<GroupWithFeed>()
         val accountId = context.currentAccountId
-        inputStream.use {
+        val opml = OpmlParser().parse(inputStream)
-            val parser: XmlPullParser = Xml.newPullParser()
+        val groupWithFeedList = mutableListOf<GroupWithFeed>().also {
-            parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false)
+            it.addGroup(defaultGroup)
-            parser.setInput(it, null)
-            parser.nextTag()
-            while (parser.next() != XmlPullParser.END_DOCUMENT) {
-                if (parser.eventType != XmlPullParser.START_TAG) {
-                    continue
         }
-                if (parser.name != "outline") {
+
-                    continue
+        opml.body.outlines.forEach {
-                }
+            // Only feeds
-                if ("rss" == parser.getAttributeValue(null, "type")) {
+            if (it.subElements.isEmpty()) {
-                    val title = parser.getAttributeValue(null, "title")
+                // It's a empty group
-                    val xmlUrl = parser.getAttributeValue(null, "xmlUrl")
+                if (it.attributes["xmlUrl"] == null) {
-                    Log.i("RLog", "rss: ${title} , ${xmlUrl}")
+                    if (!it.attributes["isDefault"].toBoolean()) {
-                    if (groupWithFeedList.isEmpty()) {
+                        groupWithFeedList.addGroup(
-                        groupWithFeedList.add(
+                            Group(
-                            GroupWithFeed(
-                                group = defaultGroup,
-                                feeds = mutableListOf()
-                            )
-                        )
-                    }
-                    groupWithFeedList.last().let { groupWithFeed ->
-                        groupWithFeed.feeds.add(
-                            Feed(
                                 id = UUID.randomUUID().toString(),
-                                name = title,
+                                name = it.attributes["title"] ?: it.text!!,
-                                url = xmlUrl,
-                                groupId = groupWithFeed.group.id,
                                 accountId = accountId,
                             )
                         )
                     }
                 } else {
-                    val title = parser.getAttributeValue(null, "title")
+                    groupWithFeedList.addFeedToDefault(
-                    Log.i("RLog", "title: ${title}")
+                        Feed(
-                    groupWithFeedList.add(
-                        GroupWithFeed(
-                            group = Group(
                             id = UUID.randomUUID().toString(),
-                                name = title,
+                            name = it.attributes["title"] ?: it.text!!,
+                            url = it.attributes["xmlUrl"]!!,
+                            groupId = defaultGroup.id,
                             accountId = accountId,
-                            ),
+                            isNotification = it.attributes["isNotification"].toBoolean(),
-                            feeds = mutableListOf()
+                            isFullContent = it.attributes["isFullContent"].toBoolean(),
                         )
                     )
                 }
+            } else {
+                var groupId = defaultGroup.id
+                if (!it.attributes["isDefault"].toBoolean()) {
+                    groupId = UUID.randomUUID().toString()
+                    groupWithFeedList.addGroup(
+                        Group(
+                            id = groupId,
+                            name = it.attributes["title"] ?: it.text!!,
+                            accountId = accountId,
+                        )
+                    )
+                }
+                it.subElements.forEach { outline ->
+                    groupWithFeedList.addFeed(
+                        Feed(
+                            id = UUID.randomUUID().toString(),
+                            name = outline.attributes["title"] ?: outline.text!!,
+                            url = outline.attributes["xmlUrl"]!!,
+                            groupId = groupId,
+                            accountId = accountId,
+                            isNotification = outline.attributes["isNotification"].toBoolean(),
+                            isFullContent = outline.attributes["isFullContent"].toBoolean(),
+                        )
+                    )
+                }
+            }
         }
         return groupWithFeedList
     }
+
+    private fun MutableList<GroupWithFeed>.addGroup(group: Group) {
+        add(GroupWithFeed(group = group, feeds = mutableListOf()))
+    }
+
+    private fun MutableList<GroupWithFeed>.addFeed(feed: Feed) {
+        last().feeds.add(feed)
+    }
+
+    private fun MutableList<GroupWithFeed>.addFeedToDefault(feed: Feed) {
+        first().feeds.add(feed)
     }
 }

app/src/main/java/me/ash/reader/ui/page/home/feeds/FeedsPage.kt

@@ -1,8 +1,11 @@
 package me.ash.reader.ui.page.home.feeds
 
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.animation.Crossfade
 import androidx.compose.animation.core.*
 import androidx.compose.foundation.background
+import androidx.compose.foundation.gestures.detectTapGestures
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
@@ -18,6 +21,8 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.rotate
+import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
@@ -36,7 +41,10 @@ import me.ash.reader.ui.page.home.feeds.subscribe.SubscribeViewModel
 import me.ash.reader.ui.widget.Banner
 import me.ash.reader.ui.widget.Subtitle
 
-@OptIn(ExperimentalMaterial3Api::class, com.google.accompanist.pager.ExperimentalPagerApi::class)
+@OptIn(
+    ExperimentalMaterial3Api::class, com.google.accompanist.pager.ExperimentalPagerApi::class,
+    androidx.compose.foundation.ExperimentalFoundationApi::class
+)
 @Composable
 fun FeedsPage(
     modifier: Modifier = Modifier,
@@ -45,6 +53,7 @@ fun FeedsPage(
     homeViewModel: HomeViewModel = hiltViewModel(),
     subscribeViewModel: SubscribeViewModel = hiltViewModel(),
 ) {
+    val context = LocalContext.current
     val scope = rememberCoroutineScope()
     val viewState = feedsViewModel.viewState.collectAsStateValue()
     val filterState = homeViewModel.filterState.collectAsStateValue()
@@ -59,6 +68,18 @@ fun FeedsPage(
         )
     )
 
+    val launcher = rememberLauncherForActivityResult(
+        ActivityResultContracts.CreateDocument()
+    ) { result ->
+        feedsViewModel.dispatch(FeedsViewAction.ExportAsString { string ->
+            result?.let { uri ->
+                context.contentResolver.openOutputStream(uri)?.let { outputStream ->
+                    outputStream.write(string.toByteArray())
+                }
+            }
+        })
+    }
+
     LaunchedEffect(Unit) {
         feedsViewModel.dispatch(FeedsViewAction.FetchAccount)
     }
@@ -77,7 +98,8 @@ fun FeedsPage(
             SmallTopAppBar(
                 title = {},
                 navigationIcon = {
-                    IconButton(onClick = { }) {
+                    IconButton(onClick = {
+                    }) {
                         Icon(
                             imageVector = Icons.Rounded.ArrowBack,
                             contentDescription = stringResource(R.string.back),
@@ -113,18 +135,26 @@ fun FeedsPage(
         content = {
             SubscribeDialog(
                 openInputStreamCallback = {
-                    feedsViewModel.dispatch(FeedsViewAction.AddFromFile(it))
+                    feedsViewModel.dispatch(FeedsViewAction.ImportFromInputStream(it))
                 },
             )
             LazyColumn {
                 item {
                     Text(
-                        modifier = Modifier.padding(
+                        modifier = Modifier
+                            .padding(
                                 start = 24.dp,
                                 top = 48.dp,
                                 end = 24.dp,
                                 bottom = 24.dp
-                        ),
+                            )
+                            .pointerInput(Unit) {
+                                detectTapGestures(
+                                    onLongPress = {
+                                        launcher.launch("ReadYou.opml")
+                                    }
+                                )
+                            },
                         text = viewState.account?.name ?: stringResource(R.string.unknown),
                         style = MaterialTheme.typography.displaySmall,
                         color = MaterialTheme.colorScheme.onSurface,

app/src/main/java/me/ash/reader/ui/page/home/feeds/FeedsViewModel.kt

@@ -31,7 +31,8 @@ class FeedsViewModel @Inject constructor(
         when (action) {
             is FeedsViewAction.FetchAccount -> fetchAccount()
             is FeedsViewAction.FetchData -> fetchData(action.filterState)
-            is FeedsViewAction.AddFromFile -> addFromFile(action.inputStream)
+            is FeedsViewAction.ImportFromInputStream -> importFromInputStream(action.inputStream)
+            is FeedsViewAction.ExportAsString -> exportAsOpml(action.callback)
             is FeedsViewAction.ScrollToItem -> scrollToItem(action.index)
         }
     }
@@ -46,13 +47,19 @@ class FeedsViewModel @Inject constructor(
         }
     }
 
-    private fun addFromFile(inputStream: InputStream) {
+    private fun importFromInputStream(inputStream: InputStream) {
         viewModelScope.launch(Dispatchers.IO) {
             opmlRepository.saveToDatabase(inputStream)
             rssRepository.get().doSync()
         }
     }
 
+    private fun exportAsOpml(callback: (String) -> Unit = {}) {
+        viewModelScope.launch(Dispatchers.Default) {
+            opmlRepository.saveToString()?.let { callback(it) }
+        }
+    }
+
     private fun fetchData(filterState: FilterState) {
         viewModelScope.launch(Dispatchers.IO) {
             pullFeeds(
@@ -143,12 +150,16 @@ sealed class FeedsViewAction {
         val filterState: FilterState,
     ) : FeedsViewAction()
 
-    object FetchAccount: FeedsViewAction()
+    object FetchAccount : FeedsViewAction()
 
-    data class AddFromFile(
+    data class ImportFromInputStream(
         val inputStream: InputStream
     ) : FeedsViewAction()
 
+    data class ExportAsString(
+        val callback: (String) -> Unit = {}
+    ) : FeedsViewAction()
+
     data class ScrollToItem(
         val index: Int
     ) : FeedsViewAction()