Move sync classes to uhabits-core

android/uhabits-android/src/main/java/org/isoron/uhabits/activities/sync/SyncActivity.kt

@@ -33,45 +33,37 @@ import org.isoron.androidbase.activities.*
 import org.isoron.androidbase.utils.*
 import org.isoron.androidbase.utils.InterfaceUtils.getFontAwesome
 import org.isoron.uhabits.*
-import org.isoron.uhabits.core.preferences.*
-import org.isoron.uhabits.core.tasks.*
+import org.isoron.uhabits.core.ui.screens.sync.*
 import org.isoron.uhabits.databinding.*
 import org.isoron.uhabits.sync.*
-import org.isoron.uhabits.utils.*
 
 
-class SyncActivity : BaseActivity() {
+class SyncActivity : BaseActivity(), SyncBehavior.Screen {
 
-    private lateinit var syncManager: SyncManager
-    private lateinit var preferences: Preferences
-    private lateinit var taskRunner: TaskRunner
     private lateinit var baseScreen: BaseScreen
     private lateinit var binding: ActivitySyncBinding
+    private lateinit var behavior: SyncBehavior
 
+    private val scope = CoroutineScope(Dispatchers.Main)
     private var styledResources = StyledResources(this)
 
     override fun onCreate(state: Bundle?) {
         super.onCreate(state)
 
-        baseScreen = BaseScreen(this)
-
         val component = (application as HabitsApplication).component
-        taskRunner = component.taskRunner
-        preferences = component.preferences
-        syncManager = component.syncManager
+        val preferences = component.preferences
+        val server = RemoteSyncServer(baseURL = preferences.syncBaseURL)
+        baseScreen = BaseScreen(this)
+        behavior = SyncBehavior(this, preferences, server)
 
         binding = ActivitySyncBinding.inflate(layoutInflater)
         setContentView(binding.root)
-
         binding.errorIcon.typeface = getFontAwesome(this)
-
         setSupportActionBar(binding.toolbar)
         supportActionBar?.setDisplayHomeAsUpEnabled(true)
         supportActionBar?.setDisplayShowHomeEnabled(true)
         supportActionBar?.elevation = 10.0f
-
         binding.instructions.setText(Html.fromHtml(resources.getString(R.string.sync_instructions)))
-
         binding.syncLink.setOnClickListener {
             copyToClipboard()
         }
@@ -79,96 +71,62 @@ class SyncActivity : BaseActivity() {
 
     override fun onResume() {
         super.onResume()
-        if(preferences.syncKey.isBlank()) {
-            register()
-        } else {
-            displayCurrentKey()
+        scope.launch {
+            behavior.onResume()
         }
     }
 
-    private fun displayCurrentKey() {
-        displayLink("https://loophabits.org/sync/${preferences.syncKey}#${preferences.encryptionKey}")
+    private fun copyToClipboard() {
+        val clipboard = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
+        clipboard.setPrimaryClip(ClipData.newPlainText("Loop Sync Link", binding.syncLink.text))
+        baseScreen.showMessage(R.string.copied_to_the_clipboard, binding.root)
     }
 
-    private fun register() {
-        displayLoading()
-        taskRunner.execute(object : Task {
-            private lateinit var encKey: EncryptionKey
-            private lateinit var syncKey: String
-            private var error = false
-            override fun doInBackground() {
-                runBlocking {
-                    try {
-                        val server = RemoteSyncServer(baseURL = preferences.syncBaseURL)
-                        syncKey = server.register()
-                        encKey = EncryptionKey.generate()
-                        preferences.enableSync(syncKey, encKey.base64)
-                    } catch (e: Exception) {
-                        Log.e("SyncActivity", "Unexpected exception", e)
-                        error = true
-                    }
-                }
+    suspend fun generateQR(msg: String): Bitmap = Dispatchers.IO {
+        val writer = QRCodeWriter()
+        val matrix = writer.encode(msg, BarcodeFormat.QR_CODE, 1024, 1024)
+        val height = matrix.height
+        val width = matrix.width
+        val bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565)
+        val bgColor = styledResources.getColor(R.attr.highContrastReverseTextColor)
+        val fgColor = styledResources.getColor(R.attr.highContrastTextColor)
+        for (x in 0 until width) {
+            for (y in 0 until height) {
+                val color = if (matrix.get(x, y)) fgColor else bgColor
+                bitmap.setPixel(x, y, color)
             }
+        }
+        return@IO bitmap
+    }
+
+    suspend fun showQR(msg: String) {
+        binding.progress.visibility = View.GONE
+        binding.qrCode.visibility = View.VISIBLE
+        binding.qrCode.setImageBitmap(generateQR(msg))
 
-            override fun onPostExecute() {
-                if (error) {
-                    displayError()
-                    return;
-                }
-                displayCurrentKey()
-            }
-        })
     }
 
-    private fun displayLoading() {
+    override suspend fun showLoadingScreen() {
         binding.qrCode.visibility = View.GONE
         binding.progress.visibility = View.VISIBLE
         binding.errorPanel.visibility = View.GONE
     }
 
-    private fun displayError() {
+    override suspend fun showErrorScreen() {
         binding.qrCode.visibility = View.GONE
         binding.progress.visibility = View.GONE
         binding.errorPanel.visibility = View.VISIBLE
     }
 
-    private fun copyToClipboard() {
-        val clipboard = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
-        clipboard.setPrimaryClip(ClipData.newPlainText("Loop Sync Link", binding.syncLink.text))
-        baseScreen.showMessage(R.string.copied_to_the_clipboard, binding.root)
-    }
-
-    private fun displayLink(link: String) {
+    override suspend fun showLink(link: String) {
         binding.qrCode.visibility = View.GONE
         binding.progress.visibility = View.VISIBLE
         binding.errorPanel.visibility = View.GONE
         binding.syncLink.text = link
-        displayQR(link)
+        showQR(link)
     }
 
-    private fun displayQR(msg: String) {
-        taskRunner.execute(object : Task {
-            lateinit var bitmap: Bitmap
-            override fun doInBackground() {
-                val writer = QRCodeWriter()
-                val matrix = writer.encode(msg, BarcodeFormat.QR_CODE, 1024, 1024)
-                val height = matrix.height
-                val width = matrix.width
-                bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565)
-                val bgColor = styledResources.getColor(R.attr.highContrastReverseTextColor)
-                val fgColor = styledResources.getColor(R.attr.highContrastTextColor)
-                for (x in 0 until width) {
-                    for (y in 0 until height) {
-                        val color = if (matrix.get(x, y)) fgColor else bgColor
-                        bitmap.setPixel(x, y, color)
-                    }
-                }
-            }
-            override fun onPostExecute() {
-                binding.progress.visibility = View.GONE
-                binding.qrCode.visibility = View.VISIBLE
-                binding.qrCode.setImageBitmap(bitmap)
-            }
-        })
+    override fun logError(msg: String) {
+        Log.e("SyncActivity", msg)
     }
 }

android/uhabits-core/build.gradle

@@ -14,7 +14,11 @@ dependencies {
     implementation 'androidx.annotation:annotation:1.0.0'
     implementation 'com.google.code.findbugs:jsr305:3.0.2'
     implementation 'org.apache.commons:commons-lang3:3.5'
+    implementation 'commons-codec:commons-codec:1.15'
     implementation 'com.google.code.gson:gson:2.8.5'
+    implementation "com.google.guava:guava:30.0-jre"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$KOTLIN_VERSION"
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:$KOTLIN_VERSION"
 
     testImplementation 'junit:junit:4.12'
     testImplementation 'org.hamcrest:hamcrest-library:1.4-atlassian-1'
@@ -23,11 +27,13 @@ dependencies {
     testImplementation 'org.json:json:20160810'
     testImplementation 'org.xerial:sqlite-jdbc:3.18.0'
     testImplementation 'nl.jqno.equalsverifier:equalsverifier:2.4.8'
+    testImplementation "org.jetbrains.kotlin:kotlin-test:$KOTLIN_VERSION"
+    testImplementation "org.jetbrains.kotlin:kotlin-reflect:$KOTLIN_VERSION"
 
     implementation('com.opencsv:opencsv:3.10') {
         exclude group: 'commons-logging', module: 'commons-logging'
     }
-    implementation "org.jetbrains.kotlin:kotlin-stdlib:$KOTLIN_VERSION"
+
 }
 
 sourceCompatibility = "1.8"

android/uhabits-core/src/main/java/org/isoron/uhabits/core/ui/screens/sync/SyncBehavior.kt

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2016-2020 Álinson Santos Xavier <isoron@gmail.com>
+ *
+ * This file is part of Loop Habit Tracker.
+ *
+ * Loop Habit Tracker is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * Loop Habit Tracker is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.isoron.uhabits.core.ui.screens.sync
+
+import org.isoron.uhabits.core.preferences.*
+import org.isoron.uhabits.sync.*
+
+class SyncBehavior(
+        val screen: Screen,
+        val preferences: Preferences,
+        val server: AbstractSyncServer,
+) {
+    suspend fun onResume() {
+        if (preferences.syncKey.isBlank()) {
+            register()
+        } else {
+            displayCurrentKey()
+        }
+    }
+
+    suspend fun displayCurrentKey() {
+        screen.showLink("https://loophabits.org/sync/${preferences.syncKey}#${preferences.encryptionKey}")
+    }
+
+    suspend fun register() {
+        screen.showLoadingScreen()
+        try {
+            val syncKey = server.register()
+            val encKey = EncryptionKey.generate()
+            preferences.enableSync(syncKey, encKey.base64)
+            displayCurrentKey()
+        } catch (e: Exception) {
+            screen.logError("Unexpected exception $e")
+            screen.showErrorScreen()
+        }
+    }
+
+    interface Screen {
+        suspend fun showLoadingScreen()
+        suspend fun showErrorScreen()
+        suspend fun showLink(link: String)
+        fun logError(msg: String)
+    }
+}

android/uhabits-core/src/main/java/org/isoron/uhabits/sync/EncryptionExt.kt

@@ -19,10 +19,11 @@
 
 @file:Suppress("UnstableApiUsage")
 
-package org.isoron.uhabits.utils
+package org.isoron.uhabits.sync
 
-import android.util.*
 import com.google.common.io.*
+import kotlinx.coroutines.*
+import org.apache.commons.codec.binary.*
 import java.io.*
 import java.nio.*
 import java.util.zip.*
@@ -52,10 +53,10 @@ class EncryptionKey private constructor(
             return EncryptionKey(base64, spec)
         }
 
-        fun generate(): EncryptionKey {
+        suspend fun generate(): EncryptionKey = Dispatchers.IO {
             try {
                 val generator = KeyGenerator.getInstance("AES").apply { init(256) }
-                return fromSecretKey(generator.generateKey())
+                return@IO fromSecretKey(generator.generateKey())
             } catch (e: Exception) {
                 throw RuntimeException(e)
             }
@@ -128,6 +129,6 @@ fun File.encryptToString(key: EncryptionKey): String {
     }
 }
 
-fun ByteArray.encodeBase64(): String = Base64.encodeToString(this, Base64.DEFAULT)
-fun String.decodeBase64(): ByteArray = Base64.decode(this, Base64.DEFAULT)
+fun ByteArray.encodeBase64(): String = Base64.encodeBase64(this).decodeToString()
+fun String.decodeBase64(): ByteArray = Base64.decodeBase64(this.toByteArray())
 

android/uhabits-core/src/test/java/org/isoron/uhabits/core/sync/EncryptionExtTest.kt

@@ -16,18 +16,17 @@
  * You should have received a copy of the GNU General Public License along
  * with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-package org.isoron.uhabits.utils
+package org.isoron.uhabits.core.sync
 
-import androidx.test.filters.*
+import kotlinx.coroutines.*
 import org.hamcrest.Matchers.*
-import org.isoron.uhabits.*
+import org.isoron.uhabits.sync.*
 import org.junit.*
 import org.junit.Assert.*
 import java.io.*
 import java.util.*
 
-@MediumTest
-class EncryptionExtTest : BaseAndroidTest() {
+class EncryptionExtTest {
 
     @Test
     fun test_encode_decode() {
@@ -39,7 +38,7 @@ class EncryptionExtTest : BaseAndroidTest() {
     }
 
     @Test
-    fun test_encrypt_decrypt_bytes() {
+    fun test_encrypt_decrypt_bytes() = runBlocking {
         val original = ByteArray(5000)
         Random().nextBytes(original)
         val key = EncryptionKey.generate()
@@ -49,7 +48,7 @@ class EncryptionExtTest : BaseAndroidTest() {
     }
 
     @Test
-    fun test_encrypt_decrypt_file() {
+    fun test_encrypt_decrypt_file() = runBlocking {
         val original = File.createTempFile("file", ".txt")
         val writer = PrintWriter(original.outputStream())
         writer.println("hello world")