begin implementing account authenticator

twidere/src/main/AndroidManifest.xml

@@ -461,6 +461,15 @@
         <service
             android:name=".service.BackgroundOperationService"
             android:label="@string/label_background_operation_service"/>
+        <service android:name=".service.AccountAuthenticatorService">
+            <intent-filter>
+                <action android:name="android.accounts.AccountAuthenticator"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.accounts.AccountAuthenticator"
+                android:resource="@xml/authenticator"/>
+        </service>
+
         <service
             android:name=".nyan.NyanWallpaperService"
             android:enabled="false"

twidere/src/main/kotlin/org/mariotaku/twidere/account/TwidereAccountAuthenticator.kt

@@ -0,0 +1,8 @@
+package org.mariotaku.twidere.account
+
+import android.accounts.AbstractAccountAuthenticator
+import android.content.Context
+
+/**
+ * Created by mariotaku on 2016/12/2.
+ */

twidere/src/main/kotlin/org/mariotaku/twidere/service/AccountAuthenticatorService.kt

@@ -0,0 +1,92 @@
+package org.mariotaku.twidere.service
+
+import android.accounts.AbstractAccountAuthenticator
+import android.accounts.Account
+import android.accounts.AccountAuthenticatorResponse
+import android.accounts.AccountManager
+import android.app.Service
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.os.IBinder
+import org.mariotaku.ktextension.set
+import org.mariotaku.twidere.activity.SignInActivity
+
+
+/**
+ * Created by mariotaku on 2016/12/2.
+ */
+class AccountAuthenticatorService : Service() {
+
+    private lateinit var authenticator: TwidereAccountAuthenticator
+
+    override fun onCreate() {
+        super.onCreate()
+        authenticator = TwidereAccountAuthenticator(this)
+    }
+
+    override fun onBind(intent: Intent): IBinder {
+        return authenticator.iBinder
+    }
+
+    internal class TwidereAccountAuthenticator(val context: Context) : AbstractAccountAuthenticator(context) {
+
+        // TODO: Make SignInActivity comply with AccountAuthenticatorActivity
+        override fun addAccount(response: AccountAuthenticatorResponse, accountType: String,
+                                authTokenType: String?, requiredFeatures: Array<String>?,
+                                options: Bundle?): Bundle {
+            val intent = Intent(context, SignInActivity::class.java)
+            intent.putExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response)
+            val result = Bundle()
+            result[AccountManager.KEY_INTENT] = intent
+            return result
+        }
+
+        override fun getAuthToken(response: AccountAuthenticatorResponse, account: Account, authTokenType: String, options: Bundle?): Bundle {
+            val am = AccountManager.get(context)
+            val authToken = am.peekAuthToken(account, authTokenType)
+            if (authToken.isNullOrEmpty()) {
+                val intent = Intent(context, SignInActivity::class.java)
+                intent.putExtra(AccountManager.KEY_ACCOUNT_AUTHENTICATOR_RESPONSE, response)
+                val result = Bundle()
+                result[AccountManager.KEY_INTENT] = intent
+                return result
+            }
+            val result = Bundle()
+            result.putString(AccountManager.KEY_ACCOUNT_NAME, account.name)
+            result.putString(AccountManager.KEY_ACCOUNT_TYPE, account.type)
+            result.putString(AccountManager.KEY_AUTHTOKEN, authToken)
+            return result
+        }
+
+        override fun confirmCredentials(response: AccountAuthenticatorResponse, account: Account, options: Bundle?): Bundle {
+            val result = Bundle()
+            result[AccountManager.KEY_BOOLEAN_RESULT] = true
+            return result
+        }
+
+        override fun editProperties(response: AccountAuthenticatorResponse, accountType: String): Bundle {
+            val result = Bundle()
+            result[AccountManager.KEY_BOOLEAN_RESULT] = true
+            return result
+        }
+
+        override fun getAuthTokenLabel(authTokenType: String): String {
+            return authTokenType
+        }
+
+        override fun hasFeatures(response: AccountAuthenticatorResponse, account: Account, features: Array<String>): Bundle {
+            val result = Bundle()
+            result[AccountManager.KEY_BOOLEAN_RESULT] = true
+            return result
+        }
+
+        override fun updateCredentials(response: AccountAuthenticatorResponse, account: Account,
+                                       authTokenType: String, options: Bundle?): Bundle {
+            val result = Bundle()
+            result[AccountManager.KEY_BOOLEAN_RESULT] = true
+            return result
+        }
+    }
+
+}

twidere/src/main/res/xml/authenticator.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<account-authenticator
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:accountType="org.mariotaku.twidere.account"
+    android:icon="@mipmap/ic_launcher"
+    android:label="@string/app_name"/>