migrate the repository to Open Feature

.editorconfig

@@ -0,0 +1,133 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = false
+max_line_length = 100
+tab_width = 4
+ij_continuation_indent_size = 8
+ij_formatter_off_tag = @formatter:off
+ij_formatter_on_tag = @formatter:on
+ij_formatter_tags_enabled = false
+ij_smart_tabs = false
+ij_visual_guides = none
+ij_wrap_on_typing = false
+
+[{*.kt,*.kts}]
+ij_kotlin_align_in_columns_case_branch = false
+ij_kotlin_align_multiline_binary_operation = false
+ij_kotlin_align_multiline_extends_list = false
+ij_kotlin_align_multiline_method_parentheses = false
+ij_kotlin_align_multiline_parameters = true
+ij_kotlin_align_multiline_parameters_in_calls = false
+ij_kotlin_allow_trailing_comma = false
+ij_kotlin_allow_trailing_comma_on_call_site = false
+ij_kotlin_assignment_wrap = normal
+ij_kotlin_blank_lines_after_class_header = 0
+ij_kotlin_blank_lines_around_block_when_branches = 0
+ij_kotlin_blank_lines_before_declaration_with_comment_or_annotation_on_separate_line = 1
+ij_kotlin_block_comment_add_space = false
+ij_kotlin_block_comment_at_first_column = true
+ij_kotlin_call_parameters_new_line_after_left_paren = true
+ij_kotlin_call_parameters_right_paren_on_new_line = true
+ij_kotlin_call_parameters_wrap = on_every_item
+ij_kotlin_catch_on_new_line = false
+ij_kotlin_class_annotation_wrap = split_into_lines
+ij_kotlin_code_style_defaults = KOTLIN_OFFICIAL
+ij_kotlin_continuation_indent_for_chained_calls = false
+ij_kotlin_continuation_indent_for_expression_bodies = false
+ij_kotlin_continuation_indent_in_argument_lists = false
+ij_kotlin_continuation_indent_in_elvis = false
+ij_kotlin_continuation_indent_in_if_conditions = false
+ij_kotlin_continuation_indent_in_parameter_lists = false
+ij_kotlin_continuation_indent_in_supertype_lists = false
+ij_kotlin_else_on_new_line = false
+ij_kotlin_enum_constants_wrap = off
+ij_kotlin_extends_list_wrap = normal
+ij_kotlin_field_annotation_wrap = split_into_lines
+ij_kotlin_finally_on_new_line = false
+ij_kotlin_if_rparen_on_new_line = true
+ij_kotlin_import_nested_classes = false
+ij_kotlin_imports_layout = *,java.**,javax.**,kotlin.**,^
+ij_kotlin_insert_whitespaces_in_simple_one_line_method = true
+ij_kotlin_keep_blank_lines_before_right_brace = 2
+ij_kotlin_keep_blank_lines_in_code = 2
+ij_kotlin_keep_blank_lines_in_declarations = 2
+ij_kotlin_keep_first_column_comment = true
+ij_kotlin_keep_indents_on_empty_lines = false
+ij_kotlin_keep_line_breaks = true
+ij_kotlin_lbrace_on_next_line = false
+ij_kotlin_line_comment_add_space = false
+ij_kotlin_line_comment_add_space_on_reformat = false
+ij_kotlin_line_comment_at_first_column = true
+ij_kotlin_method_annotation_wrap = split_into_lines
+ij_kotlin_method_call_chain_wrap = normal
+ij_kotlin_method_parameters_new_line_after_left_paren = true
+ij_kotlin_method_parameters_right_paren_on_new_line = true
+ij_kotlin_method_parameters_wrap = on_every_item
+ij_kotlin_name_count_to_use_star_import = 5
+ij_kotlin_name_count_to_use_star_import_for_members = 3
+ij_kotlin_packages_to_use_import_on_demand = unset
+ij_kotlin_parameter_annotation_wrap = off
+ij_kotlin_space_after_comma = true
+ij_kotlin_space_after_extend_colon = true
+ij_kotlin_space_after_type_colon = true
+ij_kotlin_space_before_catch_parentheses = true
+ij_kotlin_space_before_comma = false
+ij_kotlin_space_before_extend_colon = true
+ij_kotlin_space_before_for_parentheses = true
+ij_kotlin_space_before_if_parentheses = true
+ij_kotlin_space_before_lambda_arrow = true
+ij_kotlin_space_before_type_colon = false
+ij_kotlin_space_before_when_parentheses = true
+ij_kotlin_space_before_while_parentheses = true
+ij_kotlin_spaces_around_additive_operators = true
+ij_kotlin_spaces_around_assignment_operators = true
+ij_kotlin_spaces_around_equality_operators = true
+ij_kotlin_spaces_around_function_type_arrow = true
+ij_kotlin_spaces_around_logical_operators = true
+ij_kotlin_spaces_around_multiplicative_operators = true
+ij_kotlin_spaces_around_range = false
+ij_kotlin_spaces_around_relational_operators = true
+ij_kotlin_spaces_around_unary_operator = false
+ij_kotlin_spaces_around_when_arrow = true
+ij_kotlin_use_custom_formatting_for_modifiers = true
+ij_kotlin_variable_annotation_wrap = off
+ij_kotlin_while_on_new_line = false
+ij_kotlin_wrap_elvis_expressions = 1
+ij_kotlin_wrap_expression_body_functions = 1
+ij_kotlin_wrap_first_method_in_call_chain = false
+
+
+# Copied from internal settings
+[*.kt]
+continuation_indent_size = 4
+ktlint_standard_annotation = disabled # Annotations don't have to be on separate lines
+ktlint_standard_annotation-spacing = disabled # It is ok with a comment between annotation and declaration
+ktlint_standard_argument-list-wrapping = disabled # It is ok to have multiple args on one line
+ktlint_standard_spacing-between-declarations-with-annotations = disabled # No need for empty line between these
+ktlint_standard_spacing-between-declarations-with-comments = disabled # No need for empty line between these
+ktlint_standard_trailing-comma-on-call-site = disabled # Trailing commas are ok
+ktlint_standard_trailing-comma-on-declaration-site = disabled # Trailing commas are ok
+
+# There is a bug in ktlint making multiline typealias indent in the wrong way:
+# https://github.com/pinterest/ktlint/issues/1788 - enable this one this is fixed.
+ktlint_standard_indent = disabled
+
+ktlint_experimental_class-naming = enabled
+ktlint_experimental_fun-keyword-spacing = enabled
+ktlint_experimental_function-type-reference-spacing = enabled
+ktlint_experimental_nullable-type-spacing = enabled
+ktlint_experimental_spacing-between-function-name-and-opening-parenthesis = enabled
+ktlint_experimental_unnecessary-parentheses-before-trailing-lambda = enabled
+
+# Setting max line for Kotlin files, exactly as Detekt config (120 by default) to insure IDE and ktlint formatter
+# format the code that is valid for Detekt, avoiding mismatch.
+max_line_length=120
+
+# Ignore max line for kotlin test files, the same as Detekt.
+[**/{test,androidTest}/**/*.kt]
+max_line_length=off

.github/CODE_OF_CONDUCT.md

@@ -0,0 +1,3 @@
+# Code of Conduct
+
+Please refer to the [OpenFeature community page](https://openfeature.dev/community/#code-of-conduct) for more information on Code of Conduct.

.github/workflows/ci.yaml

@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request:
+    branches:
+      - '*'
+
+jobs:
+  Tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Run checks
+        run: ./gradlew check --no-daemon --stacktrace

.github/workflows/release.yaml

@@ -0,0 +1,54 @@
+name: Release
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  publish:
+    name: Release Openfeature SDK
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Cache Gradle and wrapper
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle*') }}
+          restore-keys: |
+            ${{ runner.os }}-gradle-
+
+      - uses: actions/checkout@v1
+
+      - name: Set up JDK 12
+        uses: actions/setup-java@v1
+        with:
+          java-version: 12
+
+      - name: Grant Permission for Gradlew to Execute
+        run: chmod +x gradlew
+
+      - name: Build AAR ⚙️🛠
+        run: bash ./gradlew :openfeature:assemble
+      - name: Create Release ✅
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.TOKEN_PUBLISH }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          draft: true
+          prerelease: false
+
+      - name: Upload Openfeature SDK AAR 🗳
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.TOKEN_PUBLISH }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: OpenFeature/build/outputs/aar/OpenFeature-release.aar
+          asset_name: openfeature-sdk.aar
+          asset_content_type: application/aar

.gitignore

@@ -0,0 +1 @@
+/build/

CONTRIBUTING.md

@@ -0,0 +1,17 @@
+## Getting Started
+
+OpenFeature is not keen on vendor-specific stuff in this library, but if there are changes that need to happen in the spec to enable vendor-specific stuff in user code or other extension points, check out [the spec](https://github.com/open-feature/spec).
+
+## Formatting
+
+This repo uses [ktlint](https://github.com/JLLeitschuh/ktlint-gradle) for formatting. 
+
+Please consider adding a pre-commit hook for formatting using 
+
+```
+./gradlew addKtlintCheckGitPreCommitHook
+```
+Manual formatting is done by invoking
+```
+./gradlew ktlintFormat
+```

OWNERS.md

@@ -0,0 +1,10 @@
+# Owners
+
+- See [CONTRIBUTING.md](CONTRIBUTING.md) for general contribution guidelines.
+
+## Core Developers
+
+- Fabrizio Demaria (fabriziodemaria, Spotify)
+- Nicklas Lundin (nicklasl, Spotify)
+- Vahid Torkaman (vahidlazio, Spotify)
+- Nicky Bondarenko (nickybondarenko, Spotify)

OpenFeature/.gitignore

@@ -0,0 +1 @@
+/build

OpenFeature/build.gradle.kts

@@ -0,0 +1,74 @@
+// ktlint-disable max-line-length
+plugins {
+    id("com.android.library")
+    id("org.jetbrains.kotlin.android")
+    id("maven-publish")
+    id("org.jlleitschuh.gradle.ktlint")
+    kotlin("plugin.serialization") version "1.8.10"
+}
+
+android {
+    namespace = "dev.openfeature.sdk"
+    compileSdk = 33
+
+    defaultConfig {
+        minSdk = 21
+        version = "0.0.1"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        getByName("release") {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_11.toString()
+    }
+}
+
+dependencies {
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.7.2")
+    implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.5.1")
+    testImplementation("junit:junit:4.13.2")
+    testImplementation("org.mockito.kotlin:mockito-kotlin:5.0.0")
+    testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.7.2")
+}
+
+afterEvaluate {
+    publishing {
+        publications {
+            register<MavenPublication>("release") {
+                groupId = "dev.openfeature"
+                artifactId = "kotlin-sdk"
+                version = "0.0.1-SNAPSHOT"
+
+                from(components["release"])
+                artifact(androidSourcesJar.get())
+
+                pom {
+                    name.set("OpenfeatureSDK")
+                }
+            }
+        }
+    }
+}
+
+val androidSourcesJar by tasks.registering(Jar::class) {
+    archiveClassifier.set("sources")
+    from(android.sourceSets.getByName("main").java.srcDirs)
+}
+
+// Assembling should be performed before publishing package
+tasks.named("publish") {
+    dependsOn("assemble")
+}

OpenFeature/jitpack.yaml

@@ -0,0 +1,2 @@
+jdk:
+  - openjdk11

OpenFeature/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.kts.
+#
+# 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

OpenFeature/src/main/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest>
+</manifest>

OpenFeature/src/main/java/dev/openfeature/sdk/BaseEvaluation.kt

@@ -0,0 +1,11 @@
+package dev.openfeature.sdk
+
+import dev.openfeature.sdk.exceptions.ErrorCode
+
+interface BaseEvaluation<T> {
+    val value: T
+    val variant: String?
+    val reason: String?
+    val errorCode: ErrorCode?
+    val errorMessage: String?
+}

OpenFeature/src/main/java/dev/openfeature/sdk/Client.kt

@@ -0,0 +1,8 @@
+package dev.openfeature.sdk
+
+interface Client : Features {
+    val metadata: ClientMetadata
+    val hooks: List<Hook<*>>
+
+    fun addHooks(hooks: List<Hook<*>>)
+}

OpenFeature/src/main/java/dev/openfeature/sdk/ClientMetadata.kt

@@ -0,0 +1,5 @@
+package dev.openfeature.sdk
+
+interface ClientMetadata {
+    val name: String?
+}

OpenFeature/src/main/java/dev/openfeature/sdk/EvaluationContext.kt

@@ -0,0 +1,10 @@
+package dev.openfeature.sdk
+
+interface EvaluationContext : Structure {
+    fun getTargetingKey(): String
+    fun setTargetingKey(targetingKey: String)
+
+    // Make sure these are implemented for correct object comparisons
+    override fun hashCode(): Int
+    override fun equals(other: Any?): Boolean
+}