Add LoginActivity and OAuth-related files and settings

app/build.gradle

@@ -18,8 +18,20 @@ android {
         versionName "0.9.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
+
     buildTypes {
+
+        Properties properties = new Properties()
+        properties.load(project.rootProject.file('local.properties').newDataInputStream())
+
+        debug {
+            buildConfigField("String", "CONSUMER_KEY", properties.getProperty("CONSUMER_KEY_DEBUG"))
+            buildConfigField("String", "CONSUMER_SECRET", properties.getProperty("CONSUMER_SECRET_DEBUG"))
+        }
+
         release {
+            buildConfigField("String", "CONSUMER_KEY", properties.getProperty("CONSUMER_KEY"))
+            buildConfigField("String", "CONSUMER_SECRET", properties.getProperty("CONSUMER_SECRET"))
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
@@ -56,6 +68,10 @@ dependencies {
     implementation "com.squareup.retrofit2:adapter-rxjava2:$retrofit_version"
     implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"
 
+    def scribe_java_version = '6.9.0'
+    implementation "com.github.scribejava:scribejava:$scribe_java_version"
+    implementation "com.github.scribejava:scribejava-core:$scribe_java_version"
+
     implementation 'androidx.lifecycle:lifecycle-extensions:2.1.0'
     implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.1.0'
     testImplementation 'junit:junit:4.12'

app/src/main/AndroidManifest.xml

@@ -33,6 +33,9 @@
         <activity
             android:name=".search.SearchResultActivity"
             android:theme="@style/AppTheme.ActionBar" />
+        <activity
+            android:name=".login.LoginActivity"
+            android:theme="@style/AppTheme.ActionBar" />
         <activity
             android:name="com.google.android.gms.oss.licenses.OssLicensesMenuActivity"
             android:theme="@style/AppTheme.ActionBar" />

app/src/main/java/org/ageage/eggplant/common/oauth/HatenaOAuthApi.kt

@@ -0,0 +1,17 @@
+package org.ageage.eggplant.common.oauth
+
+import com.github.scribejava.core.builder.api.DefaultApi10a
+
+class HatenaOAuthApi : DefaultApi10a() {
+    override fun getRequestTokenEndpoint(): String {
+        return "https://www.hatena.com/oauth/initiate?scope=read_public,write_public"
+    }
+
+    override fun getAuthorizationBaseUrl(): String {
+        return "https://www.hatena.ne.jp/touch/oauth/authorize"
+    }
+
+    override fun getAccessTokenEndpoint(): String {
+        return "https://www.hatena.com/oauth/token"
+    }
+}

app/src/main/java/org/ageage/eggplant/common/oauth/HatenaOAuthManager.kt

@@ -0,0 +1,42 @@
+package org.ageage.eggplant.common.oauth
+
+import com.github.scribejava.core.builder.ServiceBuilder
+import com.github.scribejava.core.model.OAuth1RequestToken
+import com.github.scribejava.core.oauth.OAuth10aService
+import io.reactivex.Single
+
+private const val CALLBACK = "https://ageage.org"
+
+class HatenaOAuthManager(
+    private val consumerKey: String,
+    private val consumerSecret: String
+) {
+
+    private var service: OAuth10aService? = null
+    private var requestToken: OAuth1RequestToken? = null
+
+    fun fetchAuthorizationUrl(): Single<String?> {
+        return Single.create {
+            service = ServiceBuilder(consumerKey)
+                .apiSecret(consumerSecret)
+                .callback(CALLBACK)
+                .build(HatenaOAuthApi())
+
+            requestToken = service?.requestToken
+            service?.getAuthorizationUrl(requestToken)?.let { token ->
+                it.onSuccess(token)
+            }
+        }
+    }
+
+    fun fetchAccessToken(oauthVerifier: String): Single<String> {
+        return Single.create {
+            service?.let { oAuthService ->
+                val accessToken =
+                    oAuthService.getAccessToken(requestToken, oauthVerifier)
+                it.onSuccess(accessToken.rawResponse)
+            }
+        }
+    }
+
+}

app/src/main/java/org/ageage/eggplant/login/LoginActivity.kt

@@ -0,0 +1,13 @@
+package org.ageage.eggplant.login
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import org.ageage.eggplant.R
+
+class LoginActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_login)
+    }
+}

app/src/main/res/layout/activity_login.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".login.LoginActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>