Base code for Amethyst

.gitignore

@@ -1,3 +1,20 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx
+local.properties
+
+
 # Built application files
 *.apk
 *.aar

app/.gitignore

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+/build

app/build.gradle

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+plugins {
+    id 'com.android.application'
+    id 'org.jetbrains.kotlin.android'
+}
+
+android {
+    namespace 'com.vitorpamplona.amethyst'
+    compileSdk 33
+
+    defaultConfig {
+        applicationId "com.vitorpamplona.amethyst"
+        minSdk 26
+        targetSdk 33
+        versionCode 1
+        versionName "0.1"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary true
+        }
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
+    }
+    kotlinOptions {
+        jvmTarget = '11'
+    }
+    buildFeatures {
+        compose true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion '1.3.2'
+    }
+    packagingOptions {
+        resources {
+            excludes += '/META-INF/{AL2.0,LGPL2.1}'
+        }
+    }
+}
+
+dependencies {
+    implementation 'androidx.core:core-ktx:1.9.0'
+    implementation 'androidx.lifecycle:lifecycle-runtime-ktx:2.5.1'
+    implementation 'androidx.activity:activity-compose:1.6.1'
+    implementation "androidx.compose.ui:ui:$compose_ui_version"
+    implementation "androidx.compose.ui:ui-tooling-preview:$compose_ui_version"
+    implementation 'androidx.compose.material:material:1.3.1'
+
+    // Navigation
+    implementation("androidx.navigation:navigation-compose:$nav_version")
+    implementation 'androidx.lifecycle:lifecycle-runtime-compose:2.6.0-alpha03'
+    implementation 'androidx.compose.runtime:runtime-livedata:1.4.0-alpha03'
+
+    // Input
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-compose:2.5.1'
+
+    // Swipe Refresh
+    implementation 'com.google.accompanist:accompanist-swiperefresh:0.24.13-rc'
+
+    // Load images from the web.
+    implementation "io.coil-kt:coil-compose:2.2.2"
+
+    // Bitcoin secp256k1 bindings to Android
+    implementation 'fr.acinq.secp256k1:secp256k1-kmp-jni-android:0.7.0'
+
+    // Nostr Base Protocol
+    implementation('com.github.vitorpamplona.NostrPostr:nostrpostrlib:master-SNAPSHOT') {
+        exclude group:'fr.acinq.secp256k1'
+        exclude module: 'guava'
+        exclude module: 'guava-testlib'
+    }
+
+    implementation 'com.squareup.retrofit2:converter-gson:2.8.1'
+    // Websockets API
+    implementation 'com.squareup.okhttp3:okhttp:4.10.0'
+
+    // Json Serialization
+    implementation 'com.fasterxml.jackson.module:jackson-module-kotlin:2.14.1'
+
+    // Rendering clickable text
+    implementation "com.google.accompanist:accompanist-flowlayout:0.28.0"
+
+    // link preview
+    implementation 'tw.com.oneup.www:Baha-UrlPreview:1.0.1'
+    implementation 'androidx.security:security-crypto-ktx:1.1.0-alpha03'
+
+    testImplementation 'junit:junit:4.13.2'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.5'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'
+    androidTestImplementation "androidx.compose.ui:ui-test-junit4:$compose_ui_version"
+    debugImplementation "androidx.compose.ui:ui-tooling:$compose_ui_version"
+    debugImplementation "androidx.compose.ui:ui-test-manifest:$compose_ui_version"
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/vitorpamplona/amethyst/ExampleInstrumentedTest.kt

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+package com.vitorpamplona.amethyst
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+  @Test
+  fun useAppContext() {
+    // Context of the app under test.
+    val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+    assertEquals("com.vitorpamplona.amethyst", appContext.packageName)
+  }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@drawable/amethyst_logo"
+        android:label="@string/app_name"
+        android:roundIcon="@drawable/amethyst_logo"
+        android:enableOnBackInvokedCallback="true"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Amethyst"
+        tools:targetApi="31">
+        <activity
+            android:name=".ui.MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Amethyst">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.app.lib_name"
+                android:value="" />
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/vitorpamplona/amethyst/KeyStorage.kt

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+package com.vitorpamplona.amethyst
+
+import android.content.Context
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKeys
+
+class KeyStorage {
+
+  fun encryptedPreferences(context: Context): EncryptedSharedPreferences {
+    val secretKey: String = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC);
+    val preferencesName = "secret_keeper"
+
+    return EncryptedSharedPreferences.create(
+      preferencesName,
+      secretKey,
+      context,
+      EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+      EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+    ) as EncryptedSharedPreferences
+  }
+
+}

app/src/main/java/com/vitorpamplona/amethyst/model/Account.kt

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+package com.vitorpamplona.amethyst.model
+
+import androidx.lifecycle.LiveData
+import com.vitorpamplona.amethyst.service.model.ReactionEvent
+import com.vitorpamplona.amethyst.service.model.RepostEvent
+import com.vitorpamplona.amethyst.service.relays.Client
+import nostr.postr.Persona
+import nostr.postr.events.TextNoteEvent
+import nostr.postr.toHex
+
+class Account(val loggedIn: Persona) {
+  var seeReplies: Boolean = true
+
+  fun userProfile(): User {
+    return LocalCache.getOrCreateUser(loggedIn.pubKey)
+  }
+
+  fun isWriteable(): Boolean {
+    return loggedIn.privKey != null
+  }
+
+  fun reactTo(note: Note) {
+    if (!isWriteable()) return
+
+    note.event?.let {
+      val event = ReactionEvent.create(it, loggedIn.privKey!!)
+      Client.send(event)
+      LocalCache.consume(event)
+    }
+  }
+
+  fun boost(note: Note) {
+    if (!isWriteable()) return
+
+    note.event?.let {
+      val event = RepostEvent.create(it, loggedIn.privKey!!)
+      Client.send(event)
+      LocalCache.consume(event)
+    }
+  }
+
+  fun sendPost(message: String, replyingTo: Note?) {
+    if (!isWriteable()) return
+
+    val replyToEvent = replyingTo?.event
+    if (replyToEvent is TextNoteEvent) {
+      val repliesTo = replyToEvent.replyTos.plus(replyToEvent.id.toHex())
+      val mentions = replyToEvent.mentions.plus(replyToEvent.pubKey.toHex())
+
+      val signedEvent = TextNoteEvent.create(
+        msg = message,
+        replyTos = repliesTo,
+        mentions = mentions,
+        privateKey = loggedIn.privKey!!
+      )
+      Client.send(signedEvent)
+      LocalCache.consume(signedEvent)
+    } else {
+      val signedEvent = TextNoteEvent.create(
+        msg = message,
+        replyTos = null,
+        mentions = null,
+        privateKey = loggedIn.privKey!!
+      )
+      Client.send(signedEvent)
+      LocalCache.consume(signedEvent)
+    }
+  }
+
+  // Observers line up here.
+  val live: AccountLiveData = AccountLiveData(this)
+
+  private fun refreshObservers() {
+    live.refresh()
+  }
+}
+
+class AccountLiveData(private val account: Account): LiveData<AccountState>(AccountState(account)) {
+  fun refresh() {
+    postValue(AccountState(account))
+  }
+
+  override fun onActive() {
+    super.onActive()
+  }
+
+  override fun onInactive() {
+    super.onInactive()
+  }
+}
+
+class AccountState(val account: Account)