feat: Attachments

app/schemas/tech.relaycorp.letro.storage.LetroDatabase/1.json

@@ -2,7 +2,7 @@
   "formatVersion": 1,
   "database": {
     "version": 1,
-    "identityHash": "1c40ad8823e534038e8cc251f7b87ade",
+    "identityHash": "e714cb3de1eddf34851bc19c7da0dd6f",
     "entities": [
       {
         "tableName": "account",
@@ -361,12 +361,62 @@
             ]
           }
         ]
+      },
+      {
+        "tableName": "attachments",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `fileId` BLOB NOT NULL, `path` TEXT NOT NULL, `messageId` INTEGER NOT NULL, FOREIGN KEY(`messageId`) REFERENCES `messages`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "fileId",
+            "columnName": "fileId",
+            "affinity": "BLOB",
+            "notNull": true
+          },
+          {
+            "fieldPath": "path",
+            "columnName": "path",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "messageId",
+            "columnName": "messageId",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": [
+          {
+            "table": "messages",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "messageId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
       }
     ],
     "views": [],
     "setupQueries": [
       "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
-      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '1c40ad8823e534038e8cc251f7b87ade')"
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, 'e714cb3de1eddf34851bc19c7da0dd6f')"
     ]
   }
 }

app/src/main/AndroidManifest.xml

@@ -23,6 +23,17 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="tech.relaycorp.letro.provider"
+            android:exported="false"
+            android:grantUriPermissions="true">
+            <meta-data
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/file_paths">
+            </meta-data>
+        </provider>
     </application>
 
 </manifest>

app/src/main/java/tech/relaycorp/letro/di/AndroidModule.kt

@@ -0,0 +1,21 @@
+package tech.relaycorp.letro.di
+
+import android.content.ContentResolver
+import android.content.Context
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AndroidModule {
+
+    @Provides
+    fun provideContentResolver(
+        @ApplicationContext context: Context,
+    ): ContentResolver {
+        return context.contentResolver
+    }
+}

app/src/main/java/tech/relaycorp/letro/di/ConversationsModule.kt

@@ -5,6 +5,8 @@ import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
+import tech.relaycorp.letro.messages.attachments.AttachmentsRepository
+import tech.relaycorp.letro.messages.attachments.AttachmentsRepositoryImpl
 import tech.relaycorp.letro.messages.converter.ExtendedConversationConverter
 import tech.relaycorp.letro.messages.converter.ExtendedConversationConverterImpl
 import tech.relaycorp.letro.messages.converter.MessageTimestampFormatter
@@ -23,6 +25,7 @@ import tech.relaycorp.letro.messages.processor.NewMessageProcessor
 import tech.relaycorp.letro.messages.processor.NewMessageProcessorImpl
 import tech.relaycorp.letro.messages.repository.ConversationsRepository
 import tech.relaycorp.letro.messages.repository.ConversationsRepositoryImpl
+import tech.relaycorp.letro.messages.storage.AttachmentsDao
 import tech.relaycorp.letro.messages.storage.ConversationsDao
 import tech.relaycorp.letro.messages.storage.MessagesDao
 import tech.relaycorp.letro.storage.LetroDatabase
@@ -42,6 +45,11 @@ object ConversationsModule {
         letroDatabase: LetroDatabase,
     ): MessagesDao = letroDatabase.messagesDao()
 
+    @Provides
+    fun provideAttachmentsDao(
+        letroDatabase: LetroDatabase,
+    ): AttachmentsDao = letroDatabase.attachmentsDao()
+
     @Module
     @InstallIn(SingletonComponent::class)
     interface Bindings {
@@ -91,5 +99,11 @@ object ConversationsModule {
         fun bindOnboardingMessageManager(
             impl: ConversationsOnboardingManagerImpl,
         ): ConversationsOnboardingManager
+
+        @Binds
+        @Singleton
+        fun bindAttachmentsRepository(
+            impl: AttachmentsRepositoryImpl,
+        ): AttachmentsRepository
     }
 }

app/src/main/java/tech/relaycorp/letro/di/FileModule.kt

@@ -0,0 +1,31 @@
+package tech.relaycorp.letro.di
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import tech.relaycorp.letro.messages.filepicker.FileConverter
+import tech.relaycorp.letro.messages.filepicker.FileConverterImpl
+import tech.relaycorp.letro.messages.filepicker.FileSaver
+import tech.relaycorp.letro.messages.filepicker.FileSaverImpl
+import tech.relaycorp.letro.messages.ui.utils.AttachmentInfoConverter
+import tech.relaycorp.letro.messages.ui.utils.AttachmentInfoConverterImpl
+
+@Module
+@InstallIn(SingletonComponent::class)
+interface FileModule {
+    @Binds
+    fun bindFileConverter(
+        impl: FileConverterImpl,
+    ): FileConverter
+
+    @Binds
+    fun bindAttachmentInfoConverter(
+        impl: AttachmentInfoConverterImpl,
+    ): AttachmentInfoConverter
+
+    @Binds
+    fun bindFileSaver(
+        impl: FileSaverImpl,
+    ): FileSaver
+}

app/src/main/java/tech/relaycorp/letro/main/MainViewModel.kt

@@ -21,16 +21,23 @@ import tech.relaycorp.letro.account.storage.AccountRepository
 import tech.relaycorp.letro.awala.AwalaInitializationState
 import tech.relaycorp.letro.awala.AwalaManager
 import tech.relaycorp.letro.contacts.storage.ContactsRepository
+import tech.relaycorp.letro.messages.attachments.AttachmentsRepository
+import tech.relaycorp.letro.messages.filepicker.FileConverter
+import tech.relaycorp.letro.messages.filepicker.model.File
 import tech.relaycorp.letro.push.model.PushAction
 import tech.relaycorp.letro.ui.navigation.RootNavigationScreen
+import tech.relaycorp.letro.utils.ext.emitOn
 import tech.relaycorp.letro.utils.ext.sendOn
+import java.util.UUID
 import javax.inject.Inject
 
 @HiltViewModel
 class MainViewModel @Inject constructor(
     private val awalaManager: AwalaManager,
     private val accountRepository: AccountRepository,
     private val contactsRepository: ContactsRepository,
+    private val attachmentsRepository: AttachmentsRepository,
+    private val fileConverter: FileConverter,
 ) : ViewModel() {
 
     private val _uiState = MutableStateFlow(MainUiState())
@@ -45,6 +52,10 @@ class MainViewModel @Inject constructor(
     val joinMeOnLetroSignal: SharedFlow<String>
         get() = _joinMeOnLetroSignal
 
+    private val _openFileSignal = MutableSharedFlow<File.FileWithoutContent>()
+    val openFileSignal: SharedFlow<File.FileWithoutContent>
+        get() = _openFileSignal
+
     private val _rootNavigationScreen: MutableStateFlow<RootNavigationScreen> =
         MutableStateFlow(RootNavigationScreen.Splash)
     val rootNavigationScreen: StateFlow<RootNavigationScreen> get() = _rootNavigationScreen
@@ -118,6 +129,18 @@ class MainViewModel @Inject constructor(
         }
     }
 
+    fun onAttachmentClick(fileId: UUID) {
+        viewModelScope.launch {
+            attachmentsRepository.getById(fileId)?.let { attachment ->
+                fileConverter.getFile(attachment)?.let { file ->
+                    if (file.exists()) {
+                        _openFileSignal.emitOn(file, viewModelScope)
+                    }
+                }
+            }
+        }
+    }
+
     private fun getJoinMeLink(accountId: String) = "$JOIN_ME_ON_LETRO_COMMON_PART_OF_LINK$accountId"
 
     companion object {

app/src/main/java/tech/relaycorp/letro/messages/attachments/AttachmentsRepository.kt

@@ -0,0 +1,42 @@
+package tech.relaycorp.letro.messages.attachments
+
+import kotlinx.coroutines.flow.Flow
+import tech.relaycorp.letro.messages.filepicker.FileSaver
+import tech.relaycorp.letro.messages.filepicker.model.File
+import tech.relaycorp.letro.messages.storage.AttachmentsDao
+import tech.relaycorp.letro.messages.storage.entity.Attachment
+import java.util.UUID
+import javax.inject.Inject
+
+interface AttachmentsRepository {
+    val attachments: Flow<List<Attachment>>
+    suspend fun saveAttachments(messageId: Long, attachments: List<File.FileWithContent>)
+    suspend fun getById(id: UUID): Attachment?
+}
+
+class AttachmentsRepositoryImpl @Inject constructor(
+    private val attachmentsDao: AttachmentsDao,
+    private val fileSaver: FileSaver,
+) : AttachmentsRepository {
+
+    override val attachments: Flow<List<Attachment>>
+        get() = attachmentsDao.getAll()
+
+    override suspend fun saveAttachments(messageId: Long, attachments: List<File.FileWithContent>) {
+        attachmentsDao.insert(
+            attachments
+                .map { file ->
+                    val path = fileSaver.save(file)
+                    Attachment(
+                        fileId = file.id,
+                        path = path,
+                        messageId = messageId,
+                    )
+                },
+        )
+    }
+
+    override suspend fun getById(id: UUID): Attachment? {
+        return attachmentsDao.getById(id)
+    }
+}