Implement Tesla Supercharger AvailabilityDetector

#272

app/build.gradle

@@ -167,6 +167,7 @@ dependencies {
     implementation 'androidx.recyclerview:recyclerview:1.2.1'
     implementation 'androidx.browser:browser:1.5.0'
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
+    implementation 'androidx.security:security-crypto:1.1.0-alpha06'
     implementation 'com.github.ev-map:CustomBottomSheetBehavior:e48f73ea7b'
     implementation 'com.squareup.retrofit2:retrofit:2.9.0'
     implementation 'com.squareup.retrofit2:converter-moshi:2.9.0'

app/src/google/java/net/vonforst/evmap/auto/ChargerDetailScreen.kt

@@ -23,8 +23,8 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import net.vonforst.evmap.*
+import net.vonforst.evmap.api.availability.AvailabilityRepository
 import net.vonforst.evmap.api.availability.ChargeLocationStatus
-import net.vonforst.evmap.api.availability.getAvailability
 import net.vonforst.evmap.api.chargeprice.ChargepriceApi
 import net.vonforst.evmap.api.createApi
 import net.vonforst.evmap.api.iconForPlugType
@@ -57,6 +57,7 @@ class ChargerDetailScreen(ctx: CarContext, val chargerSparse: ChargeLocation) :
     private val db = AppDatabase.getInstance(carContext)
     private val repo =
         ChargeLocationsRepository(createApi(prefs.dataSource, ctx), lifecycleScope, db, prefs)
+    private val availabilityRepo = AvailabilityRepository(ctx)
 
     private val imageSize = 128  // images should be 128dp according to docs
     private val imageSizeLarge = 480  // images should be 480 x 480 dp according to docs
@@ -465,7 +466,7 @@ class ChargerDetailScreen(ctx: CarContext, val chargerSparse: ChargeLocation) :
 
                 invalidate()
 
-                availability = getAvailability(charger).data
+                availability = availabilityRepo.getAvailability(charger).data
 
                 invalidate()
             } else {

app/src/google/java/net/vonforst/evmap/auto/MapScreen.kt

@@ -24,8 +24,8 @@ import com.car2go.maps.model.LatLng
 import kotlinx.coroutines.*
 import net.vonforst.evmap.BuildConfig
 import net.vonforst.evmap.R
+import net.vonforst.evmap.api.availability.AvailabilityRepository
 import net.vonforst.evmap.api.availability.ChargeLocationStatus
-import net.vonforst.evmap.api.availability.getAvailability
 import net.vonforst.evmap.api.createApi
 import net.vonforst.evmap.api.stringProvider
 import net.vonforst.evmap.model.ChargeLocation
@@ -79,6 +79,7 @@ class MapScreen(ctx: CarContext, val session: EVMapSession) :
     private val db = AppDatabase.getInstance(carContext)
     private val repo =
         ChargeLocationsRepository(createApi(prefs.dataSource, ctx), lifecycleScope, db, prefs)
+    private val availabilityRepo = AvailabilityRepository(ctx)
     private val searchRadius = 5 // kilometers
     private val distanceUpdateThreshold = Duration.ofSeconds(15)
     private val availabilityUpdateThreshold = Duration.ofMinutes(1)
@@ -606,7 +607,7 @@ class MapScreen(ctx: CarContext, val session: EVMapSession) :
                 // update only if not yet stored
                 if (!availabilities.containsKey(it.id)) {
                     lifecycleScope.async {
-                        val availability = getAvailability(it).data
+                        val availability = availabilityRepo.getAvailability(it).data
                         val date = ZonedDateTime.now()
                         availabilities[it.id] = date to availability
                     }

app/src/main/java/net/vonforst/evmap/adapter/GalleryAdapter.kt

@@ -12,6 +12,7 @@ import androidx.recyclerview.widget.ListAdapter
 import androidx.recyclerview.widget.RecyclerView
 import coil.load
 import coil.memory.MemoryCache
+import net.vonforst.evmap.BuildConfig
 import net.vonforst.evmap.R
 import net.vonforst.evmap.model.ChargerPhoto
 
@@ -70,6 +71,7 @@ class GalleryAdapter(context: Context, val itemClickListener: ItemClickListener?
                     memoryKeys[item.id] = metadata.memoryCacheKey
                 }
             )
+            allowHardware(!BuildConfig.DEBUG)
         }
     }
 }

app/src/main/java/net/vonforst/evmap/api/availability/AvailabilityDetector.kt

@@ -1,5 +1,6 @@
 package net.vonforst.evmap.api.availability
 
+import android.content.Context
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import net.vonforst.evmap.api.RateLimitInterceptor
@@ -9,6 +10,8 @@ import net.vonforst.evmap.cartesianProduct
 import net.vonforst.evmap.addDebugInterceptors
 import net.vonforst.evmap.model.ChargeLocation
 import net.vonforst.evmap.model.Chargepoint
+import net.vonforst.evmap.storage.EncryptedPreferenceDataStore
+import net.vonforst.evmap.storage.PreferenceDataSource
 import net.vonforst.evmap.viewmodel.Resource
 import okhttp3.JavaNetCookieJar
 import okhttp3.OkHttpClient
@@ -158,38 +161,41 @@ private val cookieManager = CookieManager().apply {
     setCookiePolicy(CookiePolicy.ACCEPT_ALL)
 }
 
-private val okhttp = OkHttpClient.Builder()
-    .addInterceptor(RateLimitInterceptor())
-    .addDebugInterceptors()
-    .readTimeout(10, TimeUnit.SECONDS)
-    .connectTimeout(10, TimeUnit.SECONDS)
-    .cookieJar(JavaNetCookieJar(cookieManager))
-    .build()
-val availabilityDetectors = listOf(
-    RheinenergieAvailabilityDetector(okhttp),
-    EnBwAvailabilityDetector(okhttp),
-    NewMotionAvailabilityDetector(okhttp)
-)
+class AvailabilityRepository(context: Context) {
+    private val okhttp = OkHttpClient.Builder()
+        .addInterceptor(RateLimitInterceptor())
+        .addDebugInterceptors()
+        .readTimeout(10, TimeUnit.SECONDS)
+        .connectTimeout(10, TimeUnit.SECONDS)
+        .cookieJar(JavaNetCookieJar(cookieManager))
+        .build()
+    private val availabilityDetectors = listOf(
+        RheinenergieAvailabilityDetector(okhttp),
+        TeslaAvailabilityDetector(okhttp, EncryptedPreferenceDataStore(context)),
+        EnBwAvailabilityDetector(okhttp),
+        NewMotionAvailabilityDetector(okhttp)
+    )
 
-suspend fun getAvailability(charger: ChargeLocation): Resource<ChargeLocationStatus> {
-    var value: Resource<ChargeLocationStatus>? = null
-    withContext(Dispatchers.IO) {
-        for (ad in availabilityDetectors) {
-            if (!ad.isChargerSupported(charger)) continue
-            try {
-                value = Resource.success(ad.getAvailability(charger))
-                break
-            } catch (e: IOException) {
-                value = Resource.error(e.message, null)
-                e.printStackTrace()
-            } catch (e: HttpException) {
-                value = Resource.error(e.message, null)
-                e.printStackTrace()
-            } catch (e: AvailabilityDetectorException) {
-                value = Resource.error(e.message, null)
-                e.printStackTrace()
+    suspend fun getAvailability(charger: ChargeLocation): Resource<ChargeLocationStatus> {
+        var value: Resource<ChargeLocationStatus>? = null
+        withContext(Dispatchers.IO) {
+            for (ad in availabilityDetectors) {
+                if (!ad.isChargerSupported(charger)) continue
+                try {
+                    value = Resource.success(ad.getAvailability(charger))
+                    break
+                } catch (e: IOException) {
+                    value = Resource.error(e.message, null)
+                    e.printStackTrace()
+                } catch (e: HttpException) {
+                    value = Resource.error(e.message, null)
+                    e.printStackTrace()
+                } catch (e: AvailabilityDetectorException) {
+                    value = Resource.error(e.message, null)
+                    e.printStackTrace()
+                }
             }
         }
+        return value ?: Resource.error(null, null)
     }
-    return value ?: Resource.error(null, null)
 }

app/src/main/java/net/vonforst/evmap/api/availability/TeslaAvailabilityDetector.kt

@@ -0,0 +1,519 @@
+package net.vonforst.evmap.api.availability
+
+import android.util.Base64
+import com.squareup.moshi.Json
+import com.squareup.moshi.JsonClass
+import com.squareup.moshi.Moshi
+import com.squareup.moshi.adapters.PolymorphicJsonAdapterFactory
+import net.vonforst.evmap.model.ChargeLocation
+import net.vonforst.evmap.model.Chargepoint
+import net.vonforst.evmap.model.Coordinate
+import okhttp3.OkHttpClient
+import retrofit2.Retrofit
+import retrofit2.converter.moshi.MoshiConverterFactory
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.POST
+import retrofit2.http.Query
+import java.security.MessageDigest
+import java.security.SecureRandom
+import java.time.Instant
+
+private const val coordRange = 0.005  // range of latitude and longitude for loading the map
+
+interface TeslaAuthenticationApi {
+    @POST("oauth2/v3/token")
+    suspend fun getToken(@Body request: OAuth2Request): OAuth2Response
+
+    @JsonClass(generateAdapter = true)
+    class AuthCodeRequest(
+        val code: String,
+        @Json(name = "code_verifier") val codeVerifier: String,
+        @Json(name = "redirect_uri") val redirectUri: String = "https://auth.tesla.com/void/callback",
+        scope: String = "openid email offline_access",
+        @Json(name = "client_id") clientId: String = "ownerapi"
+    ) : OAuth2Request(scope, clientId)
+
+    @JsonClass(generateAdapter = true)
+    class RefreshTokenRequest(
+        @Json(name = "refresh_token") val refreshToken: String,
+        scope: String = "openid email offline_access",
+        @Json(name = "client_id") clientId: String = "ownerapi"
+    ) : OAuth2Request(scope, clientId)
+
+    sealed class OAuth2Request(
+        val scope: String,
+        val clientId: String
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class OAuth2Response(
+        @Json(name = "access_token") val accessToken: String,
+        @Json(name = "token_type") val tokenType: String,
+        @Json(name = "expires_in") val expiresIn: Long,
+        @Json(name = "refresh_token") val refreshToken: String,
+    )
+
+    companion object {
+        private val charSet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+
+        fun create(client: OkHttpClient, baseUrl: String? = null): TeslaAuthenticationApi {
+            val retrofit = Retrofit.Builder()
+                .baseUrl(baseUrl ?: "https://auth.tesla.com")
+                .addConverterFactory(
+                    MoshiConverterFactory.create(
+                        Moshi.Builder()
+                            .add(
+                                PolymorphicJsonAdapterFactory.of(
+                                    OAuth2Request::class.java,
+                                    "grant_type"
+                                )
+                                    .withSubtype(AuthCodeRequest::class.java, "authorization_code")
+                                    .withSubtype(RefreshTokenRequest::class.java, "refresh_token")
+                                    .withDefaultValue(null)
+                            )
+                            .build()
+                    )
+                )
+                .client(client)
+                .build()
+            return retrofit.create(TeslaAuthenticationApi::class.java)
+        }
+
+        fun generateCodeVerifier(): String {
+            val code = ByteArray(64)
+            SecureRandom().nextBytes(code)
+            return Base64.encodeToString(
+                code,
+                Base64.URL_SAFE or Base64.NO_WRAP or Base64.NO_PADDING
+            )
+        }
+
+        fun generateCodeChallenge(codeVerifier: String): String {
+            val bytes = codeVerifier.toByteArray()
+            val messageDigest = MessageDigest.getInstance("SHA-256")
+            messageDigest.update(bytes, 0, bytes.size)
+            return Base64.encodeToString(
+                messageDigest.digest(),
+                Base64.URL_SAFE or Base64.NO_WRAP or Base64.NO_PADDING
+            )
+        }
+    }
+}
+
+interface TeslaOwnerApi {
+    @GET("/api/1/users/me")
+    suspend fun getUserInfo(): UserInfoResponse
+
+    @JsonClass(generateAdapter = true)
+    data class UserInfoResponse(
+        val response: UserInfo
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class UserInfo(
+        val email: String,
+        @Json(name = "full_name") val fullName: String,
+        @Json(name = "profile_image_url") val profileImageUrl: String
+    )
+
+    companion object {
+        fun create(client: OkHttpClient, token: String, baseUrl: String? = null): TeslaOwnerApi {
+            val clientWithInterceptor = client.newBuilder()
+                .addInterceptor { chain ->
+                    // add API key to every request
+                    val request = chain.request().newBuilder()
+                        .header("Authorization", "Bearer $token")
+                        .header("User-Agent", "okhttp/4.9.2")
+                        .header("x-tesla-user-agent", "TeslaApp/4.19.5-1667/3a5d531cc3/android/27")
+                        .header("Accept", "*/*")
+                        .build()
+                    chain.proceed(request)
+                }.build()
+            val retrofit = Retrofit.Builder()
+                .baseUrl(baseUrl ?: "https://owner-api.teslamotors.com")
+                .addConverterFactory(MoshiConverterFactory.create())
+                .client(clientWithInterceptor)
+                .build()
+            return retrofit.create(TeslaOwnerApi::class.java)
+        }
+    }
+}
+
+interface TeslaGraphQlApi {
+    @POST("/graphql")
+    suspend fun getNearbyChargingSites(
+        @Body request: GetNearbyChargingSitesRequest,
+        @Query("operationName") operationName: String = "GetNearbyChargingSites",
+        @Query("deviceLanguage") deviceLanguage: String = "en",
+        @Query("deviceCountry") deviceCountry: String = "US",
+        @Query("ttpLocale") ttpLocale: String = "en_US",
+        @Query("vin") vin: String = "",
+    ): GetNearbyChargingSitesResponse
+
+    @POST("/graphql")
+    suspend fun getChargingSiteInformation(
+        @Body request: GetChargingSiteInformationRequest,
+        @Query("operationName") operationName: String = "getChargingSiteInformation",
+        @Query("deviceLanguage") deviceLanguage: String = "en",
+        @Query("deviceCountry") deviceCountry: String = "US",
+        @Query("ttpLocale") ttpLocale: String = "en_US",
+        @Query("vin") vin: String = "",
+    ): GetChargingSiteInformationResponse
+
+    @JsonClass(generateAdapter = true)
+    data class GetNearbyChargingSitesRequest(
+        override val variables: GetNearbyChargingSitesVariables,
+        override val operationName: String = "GetNearbyChargingSites",
+        override val query: String =
+            "\n    query GetNearbyChargingSites(\$args: GetNearbyChargingSitesRequestType!) {\n  charging {\n    nearbySites(args: \$args) {\n      sitesAndDistances {\n        ...ChargingNearbySitesFragment\n      }\n    }\n  }\n}\n    \n    fragment ChargingNearbySitesFragment on ChargerSiteAndDistanceType {\n  activeOutages {\n    message\n    nonTeslasAffectedOnly {\n      value\n    }\n  }\n  availableStalls {\n    value\n  }\n  centroid {\n    ...EnergySvcCoordinateTypeFields\n  }\n  drivingDistanceMiles {\n    value\n  }\n  entryPoint {\n    ...EnergySvcCoordinateTypeFields\n  }\n  haversineDistanceMiles {\n    value\n  }\n  id {\n    text\n  }\n  localizedSiteName {\n    value\n  }\n  maxPowerKw {\n    value\n  }\n  trtId {\n    value\n  }\n  totalStalls {\n    value\n  }\n  siteType\n  accessType\n  waitEstimateBucket\n  hasHighCongestion\n}\n    \n    fragment EnergySvcCoordinateTypeFields on EnergySvcCoordinateType {\n  latitude\n  longitude\n}\n    "
+    ) : GraphQlRequest()
+
+    @JsonClass(generateAdapter = true)
+    data class GetNearbyChargingSitesVariables(val args: GetNearbyChargingSitesArgs)
+
+    @JsonClass(generateAdapter = true)
+    data class GetNearbyChargingSitesArgs(
+        val userLocation: Coordinate,
+        val northwestCorner: Coordinate,
+        val southeastCorner: Coordinate,
+        val openToNonTeslasFilter: OpenToNonTeslasFilterValue,
+        val languageCode: String = "en",
+        val countryCode: String = "US",
+        //val vin: String = "",
+        //val maxCount: Int = 100
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class OpenToNonTeslasFilterValue(val value: Boolean)
+
+    @JsonClass(generateAdapter = true)
+    data class Coordinate(val latitude: Double, val longitude: Double)
+
+    @JsonClass(generateAdapter = true)
+    data class GetChargingSiteInformationRequest(
+        override val variables: GetChargingSiteInformationVariables,
+        override val operationName: String = "getChargingSiteInformation",
+        override val query: String =
+            "\n    query getChargingSiteInformation(\$id: ChargingSiteIdentifierInputType!, \$vehicleMakeType: ChargingVehicleMakeTypeEnum, \$deviceCountry: String!, \$deviceLanguage: String!) {\n  charging {\n    site(\n      id: \$id\n      deviceCountry: \$deviceCountry\n      deviceLanguage: \$deviceLanguage\n      vehicleMakeType: \$vehicleMakeType\n    ) {\n      siteStatic {\n        ...SiteStaticFragmentNoHoldAmt\n      }\n      siteDynamic {\n        ...SiteDynamicFragment\n      }\n      pricing(vehicleMakeType: \$vehicleMakeType) {\n        userRates {\n          ...ChargingActiveRateFragment\n        }\n        memberRates {\n          ...ChargingActiveRateFragment\n        }\n        hasMembershipPricing\n        hasMSPPricing\n        canDisplayCombinedComparison\n      }\n      holdAmount(vehicleMakeType: \$vehicleMakeType) {\n        currencyCode\n        holdAmount\n      }\n      congestionPriceHistogram(vehicleMakeType: \$vehicleMakeType) {\n        ...CongestionPriceHistogramFragment\n      }\n    }\n  }\n}\n    \n    fragment SiteStaticFragmentNoHoldAmt on ChargingSiteStaticType {\n  address {\n    ...AddressFragment\n  }\n  amenities\n  centroid {\n    ...EnergySvcCoordinateTypeFields\n  }\n  entryPoint {\n    ...EnergySvcCoordinateTypeFields\n  }\n  id {\n    text\n  }\n  accessCode {\n    value\n  }\n  localizedSiteName {\n    value\n  }\n  maxPowerKw {\n    value\n  }\n  name\n  openToPublic\n  chargers {\n    id {\n      text\n    }\n    label {\n      value\n    }\n  }\n  publicStallCount\n  timeZone {\n    id\n    version\n  }\n  fastchargeSiteId {\n    value\n  }\n  siteType\n  accessType\n  isMagicDockSupportedSite\n}\n    \n    fragment AddressFragment on EnergySvcAddressType {\n  streetNumber {\n    value\n  }\n  street {\n    value\n  }\n  district {\n    value\n  }\n  city {\n    value\n  }\n  state {\n    value\n  }\n  postalCode {\n    value\n  }\n  country\n}\n    \n\n    fragment EnergySvcCoordinateTypeFields on EnergySvcCoordinateType {\n  latitude\n  longitude\n}\n    \n\n    fragment SiteDynamicFragment on ChargingSiteDynamicType {\n  id {\n    text\n  }\n  activeOutages {\n    message\n    nonTeslasAffectedOnly {\n      value\n    }\n  }\n  chargersAvailable {\n    value\n  }\n  chargerDetails {\n    charger {\n      id {\n        text\n      }\n      label {\n        value\n      }\n      name\n    }\n    availability\n  }\n  waitEstimateBucket\n  currentCongestion\n}\n    \n\n    fragment ChargingActiveRateFragment on ChargingActiveRateType {\n  activePricebook {\n    charging {\n      ...ChargingUserRateFragment\n    }\n    parking {\n      ...ChargingUserRateFragment\n    }\n    priceBookID\n  }\n}\n    \n    fragment ChargingUserRateFragment on ChargingUserRateType {\n  currencyCode\n  programType\n  rates\n  buckets {\n    start\n    end\n  }\n  bucketUom\n  touRates {\n    enabled\n    activeRatesByTime {\n      startTime\n      endTime\n      rates\n    }\n  }\n  uom\n  vehicleMakeType\n}\n    \n\n    fragment CongestionPriceHistogramFragment on HistogramData {\n  axisLabels {\n    index\n    value\n  }\n  regionLabels {\n    index\n    value {\n      ...ChargingPriceFragment\n      ... on HistogramRegionLabelValueString {\n        value\n      }\n    }\n  }\n  chargingUom\n  parkingUom\n  parkingRate {\n    ...ChargingPriceFragment\n  }\n  data\n  activeBar\n  maxRateIndex\n  whenRateChanges\n}\n    \n    fragment ChargingPriceFragment on ChargingPrice {\n  currencyCode\n  price\n}\n"
+    ) : GraphQlRequest()
+
+    @JsonClass(generateAdapter = true)
+    data class GetChargingSiteInformationVariables(
+        val id: ChargingSiteIdentifier,
+        val vehicleMakeType: VehicleMakeType,
+        val deviceLanguage: String = "en",
+        val deviceCountry: String = "US",
+        val ttpLocale: String = "en_US"
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class ChargingSiteIdentifier(
+        val id: String,
+        val type: ChargingSiteIdentifierType = ChargingSiteIdentifierType.SITE_ID
+    )
+
+    enum class ChargingSiteIdentifierType {
+        SITE_ID
+    }
+
+    enum class VehicleMakeType {
+        TESLA, NON_TESLA
+    }
+
+    sealed class GraphQlRequest {
+        abstract val operationName: String
+        abstract val query: String
+        abstract val variables: Any?
+    }
+
+    @JsonClass(generateAdapter = true)
+    data class GetNearbyChargingSitesResponse(val data: GetNearbyChargingSitesResponseData)
+
+    @JsonClass(generateAdapter = true)
+    data class GetNearbyChargingSitesResponseData(val charging: GetNearbyChargingSitesResponseDataCharging)
+
+    @JsonClass(generateAdapter = true)
+    data class GetNearbyChargingSitesResponseDataCharging(val nearbySites: GetNearbyChargingSitesResponseDataChargingNearbySites)
+
+    @JsonClass(generateAdapter = true)
+    data class GetNearbyChargingSitesResponseDataChargingNearbySites(val sitesAndDistances: List<ChargingSite>)
+
+    @JsonClass(generateAdapter = true)
+    data class ChargingSite(
+        val activeOutages: List<Outage>,
+        val availableStalls: Value<Int>?,
+        val centroid: Coordinate,
+        val drivingDistanceMiles: Value<Double>?,
+        val entryPoint: Coordinate,
+        val haversineDistanceMiles: Value<Double>,
+        val id: Text,
+        val localizedSiteName: Value<String>,
+        val maxPowerKw: Value<Int>,
+        val totalStalls: Value<Int>
+        // TODO: siteType, accessType
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class Outage(val message: String /* TODO: */)
+
+    @JsonClass(generateAdapter = true)
+    data class Value<T : Any>(val value: T)
+
+    @JsonClass(generateAdapter = true)
+    data class Text(val text: String)
+
+    @JsonClass(generateAdapter = true)
+    data class GetChargingSiteInformationResponse(val data: GetChargingSiteInformationResponseData)
+
+    @JsonClass(generateAdapter = true)
+    data class GetChargingSiteInformationResponseData(val charging: GetChargingSiteInformationResponseDataCharging)
+
+    @JsonClass(generateAdapter = true)
+    data class GetChargingSiteInformationResponseDataCharging(val site: ChargingSiteInformation)
+
+    @JsonClass(generateAdapter = true)
+    data class ChargingSiteInformation(
+        // TODO: congestionPriceHistogram, pricing
+        val siteDynamic: SiteDynamic,
+        val siteStatic: SiteStatic
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class SiteDynamic(
+        val activeOutages: List<Outage>,
+        val chargerDetails: List<ChargerDetail>,
+        val chargersAvailable: Value<Int>?,
+        val currentCongestion: Double,
+        val id: Text,
+        val waitEstimateBucket: WaitEstimateBucket
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class ChargerDetail(
+        val availability: ChargerAvailability,
+        val charger: ChargerId
+    )
+
+    @JsonClass(generateAdapter = true)
+    data class ChargerId(
+        val id: Text,
+        val label: Value<String>,
+        val name: String?
+    ) {
+        val labelNumber
+            get() = label.value.replace(Regex("""\D"""), "").toInt()
+        val labelLetter
+            get() = label.value.replace(Regex("""\d"""), "")
+    }
+
+    @JsonClass(generateAdapter = true)
+    data class SiteStatic(
+        val accessCode: Value<String>?,
+        val centroid: Coordinate,
+        val chargers: List<ChargerId>,
+        val entryPoint: Coordinate,
+        val fastchargeSiteId: Value<Long>,
+        val id: Text,
+        val isMagicDockSupportedSite: Boolean,
+        val localizedSiteName: Value<String>,
+        val maxPowerKw: Value<Int>,
+        val name: String,
+        val openToPublic: Boolean,
+        val publicStallCount: Int
+        // TODO: siteType, accessType, address, amenities, timeZone
+    )
+
+    enum class ChargerAvailability {
+        @Json(name = "CHARGER_AVAILABILITY_AVAILABLE")
+        AVAILABLE,
+
+        @Json(name = "CHARGER_AVAILABILITY_OCCUPIED")
+        OCCUPIED,
+
+        @Json(name = "CHARGER_AVAILABILITY_DOWN")
+        DOWN,
+        @Json(name = "CHARGER_AVAILABILITY_UNKNOWN")
+        UNKNOWN;
+
+        fun toStatus() = when (this) {
+            AVAILABLE -> ChargepointStatus.AVAILABLE
+            OCCUPIED -> ChargepointStatus.OCCUPIED
+            DOWN -> ChargepointStatus.FAULTED
+            UNKNOWN -> ChargepointStatus.UNKNOWN
+        }
+    }
+
+    enum class WaitEstimateBucket {
+        @Json(name = "WAIT_ESTIMATE_BUCKET_NO_WAIT")
+        NO_WAIT,
+
+        @Json(name = "WAIT_ESTIMATE_BUCKET_LESS_THAN_5_MINUTES")
+        LESS_THAN_5_MINUTES,
+
+        @Json(name = "WAIT_ESTIMATE_BUCKET_APPROXIMATELY_5_MINUTES")
+        APPROXIMATELY_5_MINUTES,
+
+        @Json(name = "WAIT_ESTIMATE_BUCKET_APPROXIMATELY_10_MINUTES")
+        APPROXIMATELY_10_MINUTES,
+
+        @Json(name = "WAIT_ESTIMATE_BUCKET_APPROXIMATELY_15_MINUTES")
+        APPROXIMATELY_15_MINUTES,
+
+        @Json(name = "WAIT_ESTIMATE_BUCKET_APPROXIMATELY_20_MINUTES")
+        APPROXIMATELY_20_MINUTES,
+
+        @Json(name = "WAIT_ESTIMATE_BUCKET_UNKNOWN")
+        UNKNOWN
+    }
+
+    companion object {
+        fun create(client: OkHttpClient, token: String, baseUrl: String? = null): TeslaGraphQlApi {
+            val clientWithInterceptor = client.newBuilder()
+                .addInterceptor { chain ->
+                    // add API key to every request
+                    val request = chain.request().newBuilder()
+                        .header("Authorization", "Bearer $token")
+                        .header("User-Agent", "okhttp/4.9.2")
+                        .header("x-tesla-user-agent", "TeslaApp/4.19.5-1667/3a5d531cc3/android/27")
+                        .header("Accept", "*/*")
+                        .build()
+                    chain.proceed(request)
+                }.build()
+            val retrofit = Retrofit.Builder()
+                .baseUrl(baseUrl ?: "https://akamai-apigateway-charging-ownership.tesla.com")
+                .addConverterFactory(MoshiConverterFactory.create())
+                .client(clientWithInterceptor)
+                .build()
+            return retrofit.create(TeslaGraphQlApi::class.java)
+        }
+    }
+}
+
+fun Coordinate.asTeslaCoord() =
+    TeslaGraphQlApi.Coordinate(this.lat, this.lng)
+
+class TeslaAvailabilityDetector(
+    private val client: OkHttpClient,
+    private val tokenStore: TokenStore,
+    private val baseUrl: String? = null
+) :
+    BaseAvailabilityDetector(client) {
+
+    private val authApi = TeslaAuthenticationApi.create(client, null)
+    private var api: TeslaGraphQlApi? = null
+
+    interface TokenStore {
+        var teslaRefreshToken: String?
+        var teslaAccessToken: String?
+        var teslaAccessTokenExpiry: Long
+    }
+
+    override suspend fun getAvailability(location: ChargeLocation): ChargeLocationStatus {
+        val api = initApi()
+        val req = TeslaGraphQlApi.GetNearbyChargingSitesRequest(
+            TeslaGraphQlApi.GetNearbyChargingSitesVariables(
+                TeslaGraphQlApi.GetNearbyChargingSitesArgs(
+                    location.coordinates.asTeslaCoord(),
+                    TeslaGraphQlApi.Coordinate(
+                        location.coordinates.lat + coordRange,
+                        location.coordinates.lng - coordRange
+                    ),
+                    TeslaGraphQlApi.Coordinate(
+                        location.coordinates.lat - coordRange,
+                        location.coordinates.lng + coordRange
+                    ),
+                    TeslaGraphQlApi.OpenToNonTeslasFilterValue(false)
+                )
+            )
+        )
+        val results = api.getNearbyChargingSites(
+            req,
+            req.operationName
+        ).data.charging.nearbySites.sitesAndDistances
+        val result =
+            results.minByOrNull { it.haversineDistanceMiles.value }
+                ?: throw AvailabilityDetectorException("no candidates found.")
+
+        val details = api.getChargingSiteInformation(
+            TeslaGraphQlApi.GetChargingSiteInformationRequest(
+                TeslaGraphQlApi.GetChargingSiteInformationVariables(
+                    TeslaGraphQlApi.ChargingSiteIdentifier(result.id.text),
+                    TeslaGraphQlApi.VehicleMakeType.TESLA
+                )
+            )
+        ).data.charging.site
+
+
+        val scV2Connectors = location.chargepoints.filter { it.type == Chargepoint.SUPERCHARGER }
+        val scV2CCSConnectors = location.chargepoints.filter {
+            it.type in listOf(
+                Chargepoint.CCS_TYPE_2,
+                Chargepoint.CCS_UNKNOWN
+            ) && it.power != null && it.power <= 150
+        }
+        val scV3Connectors = location.chargepoints.filter {
+            it.type in listOf(
+                Chargepoint.CCS_TYPE_2,
+                Chargepoint.CCS_UNKNOWN
+            ) && it.power != null && it.power > 150
+        }
+        if (location.totalChargepoints != scV2Connectors.sumOf { it.count } + scV3Connectors.sumOf { it.count } + scV2CCSConnectors.sumOf { it.count }) throw AvailabilityDetectorException(
+            "charger has unknown connectors"
+        )
+
+        val statusSorted = details.siteDynamic.chargerDetails.sortedBy { it.charger.labelLetter }
+            .sortedBy { it.charger.labelNumber }
+
+        val statusMap = emptyMap<Chargepoint, List<ChargepointStatus>>().toMutableMap()
+        var i = 0;
+        for (connector in scV2Connectors) {
+            statusMap[connector] =
+                statusSorted.subList(i, i + connector.count).map { it.availability.toStatus() }
+            i += connector.count
+        }
+        if (scV2CCSConnectors.isNotEmpty()) {
+            i = 0;
+            for (connector in scV2CCSConnectors) {
+                statusMap[connector] =
+                    statusSorted.subList(i, i + connector.count).map { it.availability.toStatus() }
+                i += connector.count
+            }
+        }
+        for (connector in scV3Connectors) {
+            statusMap[connector] =
+                statusSorted.subList(i, i + connector.count).map { it.availability.toStatus() }
+            i += connector.count
+        }
+        return ChargeLocationStatus(statusMap, "Tesla")
+    }
+
+    override fun isChargerSupported(charger: ChargeLocation): Boolean {
+        return when (charger.dataSource) {
+            "goingelectric" -> charger.network == "Tesla Supercharger"
+            "openchargemap" -> charger.chargepriceData?.network in listOf("23", "3534")
+            else -> false
+        }
+    }
+
+    private suspend fun initApi(): TeslaGraphQlApi {
+        return api ?: run {
+            val now = Instant.now().epochSecond
+            val token =
+                tokenStore.teslaAccessToken.takeIf { tokenStore.teslaAccessTokenExpiry > now }
+                    ?: run {
+                        val refreshToken = tokenStore.teslaRefreshToken
+                            ?: throw AvailabilityDetectorException("not signed in")
+                        val response =
+                            authApi.getToken(TeslaAuthenticationApi.RefreshTokenRequest(refreshToken))
+                        tokenStore.teslaAccessToken = response.accessToken
+                        tokenStore.teslaAccessTokenExpiry = now + response.expiresIn
+                        response.accessToken
+                    }
+            val newApi = TeslaGraphQlApi.create(client, token, baseUrl)
+            api = newApi
+            newApi
+        }
+    }
+
+}

app/src/main/java/net/vonforst/evmap/api/goingelectric/GoingElectricModel.kt

@@ -211,6 +211,7 @@ data class GEChargepoint(val type: String, val power: Double, val count: Int) {
                 "Typ1" -> Chargepoint.TYPE_1
                 "Typ2" -> Chargepoint.TYPE_2_UNKNOWN
                 "Typ3" -> Chargepoint.TYPE_3
+                "Tesla Supercharger CCS" -> Chargepoint.CCS_UNKNOWN
                 "CCS" -> Chargepoint.CCS_UNKNOWN
                 "Schuko" -> Chargepoint.SCHUKO
                 "CHAdeMO" -> Chargepoint.CHADEMO

app/src/main/java/net/vonforst/evmap/fragment/oauth/OAuthLoginFragment.kt

@@ -0,0 +1,70 @@
+package net.vonforst.evmap.fragment.oauth
+
+import android.annotation.SuppressLint
+import android.graphics.Bitmap
+import android.net.Uri
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.webkit.CookieManager
+import android.webkit.WebResourceRequest
+import android.webkit.WebView
+import android.webkit.WebViewClient
+import androidx.appcompat.widget.Toolbar
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.setFragmentResult
+import androidx.navigation.fragment.findNavController
+import androidx.navigation.ui.setupWithNavController
+import net.vonforst.evmap.MapsActivity
+import net.vonforst.evmap.R
+
+class OAuthLoginFragment : Fragment() {
+    private lateinit var webView: WebView
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View = inflater.inflate(R.layout.fragment_oauth_login, container, false)
+
+    @SuppressLint("SetJavaScriptEnabled")
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        val toolbar = view.findViewById<Toolbar>(R.id.toolbar)
+        toolbar.setupWithNavController(
+            findNavController(),
+            (requireActivity() as MapsActivity).appBarConfiguration
+        )
+
+        val args = OAuthLoginFragmentArgs.fromBundle(requireArguments())
+        val uri = Uri.parse(args.url)
+
+        webView = view.findViewById(R.id.webView)
+        CookieManager.getInstance().removeAllCookies(null)
+        webView.webViewClient = object : WebViewClient() {
+            override fun shouldOverrideUrlLoading(
+                view: WebView,
+                request: WebResourceRequest
+            ): Boolean {
+                val url = request.url
+
+                if (url.toString().startsWith(args.resultUrlPrefix)) {
+                    val result = Bundle()
+                    result.putString("url", url.toString())
+                    setFragmentResult(args.url, result)
+                    findNavController().popBackStack()
+                }
+
+                return url.host != uri.host
+            }
+
+            override fun onPageStarted(view: WebView, url: String, favicon: Bitmap?) {
+                super.onPageStarted(view, url, favicon)
+            }
+        }
+        webView.settings.javaScriptEnabled = true
+        webView.loadUrl(args.url)
+    }
+}

app/src/main/java/net/vonforst/evmap/fragment/preference/BaseSettingsFragment.kt

@@ -12,15 +12,18 @@ import com.google.android.material.transition.MaterialFadeThrough
 import com.google.android.material.transition.MaterialSharedAxis
 import net.vonforst.evmap.MapsActivity
 import net.vonforst.evmap.R
+import net.vonforst.evmap.storage.EncryptedPreferenceDataStore
 import net.vonforst.evmap.storage.PreferenceDataSource
 
 abstract class BaseSettingsFragment : PreferenceFragmentCompat(),
     SharedPreferences.OnSharedPreferenceChangeListener {
     protected lateinit var prefs: PreferenceDataSource
+    protected lateinit var encryptedPrefs: EncryptedPreferenceDataStore
     protected abstract val isTopLevel: Boolean
 
     override fun onCreate(savedInstanceState: Bundle?) {
         prefs = PreferenceDataSource(requireContext())
+        encryptedPrefs = EncryptedPreferenceDataStore(requireContext())
         super.onCreate(savedInstanceState)
 
         if (isTopLevel) {

app/src/main/java/net/vonforst/evmap/fragment/preference/DataSettingsFragment.kt

@@ -1,14 +1,28 @@
 package net.vonforst.evmap.fragment.preference
 
 import android.content.SharedPreferences
+import android.net.Uri
 import android.os.Bundle
 import android.widget.TextView
+import android.widget.Toast
+import androidx.fragment.app.setFragmentResultListener
 import androidx.fragment.app.viewModels
+import androidx.lifecycle.lifecycleScope
+import androidx.navigation.fragment.findNavController
 import androidx.preference.Preference
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.snackbar.Snackbar
+import kotlinx.coroutines.launch
 import net.vonforst.evmap.R
+import net.vonforst.evmap.addDebugInterceptors
+import net.vonforst.evmap.api.availability.TeslaAuthenticationApi
+import net.vonforst.evmap.api.availability.TeslaOwnerApi
+import net.vonforst.evmap.fragment.oauth.OAuthLoginFragmentArgs
 import net.vonforst.evmap.viewmodel.SettingsViewModel
 import net.vonforst.evmap.viewmodel.viewModelFactory
+import okhttp3.OkHttpClient
+import okio.IOException
+import java.time.Instant
 
 class DataSettingsFragment : BaseSettingsFragment() {
     override val isTopLevel = false
@@ -23,8 +37,25 @@ class DataSettingsFragment : BaseSettingsFragment() {
         }
     })
 
+    private lateinit var teslaAccountPreference: Preference
+
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         setPreferencesFromResource(R.xml.settings_data, rootKey)
+        teslaAccountPreference = findPreference<Preference>("tesla_account")!!
+    }
+
+    override fun onResume() {
+        super.onResume()
+        refreshTeslaAccountStatus()
+    }
+
+    private fun refreshTeslaAccountStatus() {
+        teslaAccountPreference.summary =
+            if (encryptedPrefs.teslaRefreshToken != null) {
+                getString(R.string.pref_tesla_account_enabled, encryptedPrefs.teslaEmail)
+            } else {
+                getString(R.string.pref_tesla_account_disabled)
+            }
     }
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String) {
@@ -60,7 +91,85 @@ class DataSettingsFragment : BaseSettingsFragment() {
                 vm.deleteRecentSearchResults()
                 true
             }
+
+            "tesla_account" -> {
+                if (encryptedPrefs.teslaRefreshToken != null) {
+                    teslaLogout()
+                } else {
+                    teslaLogin()
+                }
+                true
+            }
+
             else -> super.onPreferenceTreeClick(preference)
         }
     }
+
+    private fun teslaLogin() {
+        val codeVerifier = TeslaAuthenticationApi.generateCodeVerifier()
+        val codeChallenge = TeslaAuthenticationApi.generateCodeChallenge(codeVerifier)
+        val uri = Uri.parse("https://auth.tesla.com/oauth2/v3/authorize").buildUpon()
+            .appendQueryParameter("client_id", "ownerapi")
+            .appendQueryParameter("code_challenge", codeChallenge)
+            .appendQueryParameter("code_challenge_method", "S256")
+            .appendQueryParameter("redirect_uri", "https://auth.tesla.com/void/callback")
+            .appendQueryParameter("response_type", "code")
+            .appendQueryParameter("scope", "openid email offline_access")
+            .appendQueryParameter("state", "123").build()
+
+        val args = OAuthLoginFragmentArgs(
+            uri.toString(),
+            "https://auth.tesla.com/void/callback"
+        ).toBundle()
+
+        setFragmentResultListener(uri.toString()) { _, result ->
+            teslaGetAccessToken(result, codeVerifier)
+        }
+
+        findNavController().navigate(R.id.oauth_login, args)
+    }
+
+    private fun teslaGetAccessToken(result: Bundle, codeVerifier: String) {
+        teslaAccountPreference.summary = getString(R.string.logging_in)
+
+        val url = Uri.parse(result.getString("url"))
+        val code = url.getQueryParameter("code")!!
+        val okhttp = OkHttpClient.Builder().addDebugInterceptors().build()
+        val request = TeslaAuthenticationApi.AuthCodeRequest(code, codeVerifier)
+        lifecycleScope.launch {
+            try {
+                val time = Instant.now().epochSecond
+                val response =
+                    TeslaAuthenticationApi.create(okhttp).getToken(request)
+                val userResponse =
+                    TeslaOwnerApi.create(okhttp, response.accessToken).getUserInfo()
+
+                encryptedPrefs.teslaEmail = userResponse.response.email
+                encryptedPrefs.teslaAccessToken = response.accessToken
+                encryptedPrefs.teslaAccessTokenExpiry = time + response.expiresIn
+                encryptedPrefs.teslaRefreshToken = response.refreshToken
+            } catch (e: IOException) {
+                view?.let {
+                    Snackbar.make(it, R.string.connection_error, Snackbar.LENGTH_SHORT).show()
+                }
+            }
+            refreshTeslaAccountStatus()
+        }
+    }
+
+    private fun teslaLogout() {
+        MaterialAlertDialogBuilder(requireContext())
+            .setMessage(getString(R.string.pref_tesla_account_enabled, encryptedPrefs.teslaEmail))
+            .setPositiveButton(R.string.ok) { _, _ -> }
+            .setNegativeButton(R.string.log_out) { _, _ ->
+                // sign out
+                encryptedPrefs.teslaRefreshToken = null
+                encryptedPrefs.teslaAccessToken = null
+                encryptedPrefs.teslaAccessTokenExpiry = -1
+                encryptedPrefs.teslaEmail = null
+                view?.let { Snackbar.make(it, R.string.logged_out, Snackbar.LENGTH_SHORT).show() }
+                refreshTeslaAccountStatus()
+            }
+            .show()
+    }
 }

app/src/main/java/net/vonforst/evmap/storage/EncryptedPreferenceDataStore.kt

@@ -0,0 +1,47 @@
+package net.vonforst.evmap.storage
+
+import android.content.Context
+import androidx.preference.PreferenceManager
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKey
+import androidx.security.crypto.MasterKeys
+import net.vonforst.evmap.api.availability.TeslaAvailabilityDetector
+
+/**
+ * Encrypted data storage for sensitive data such as API access tokens.
+ * This will not be included in backups.
+ */
+class EncryptedPreferenceDataStore(context: Context) : TeslaAvailabilityDetector.TokenStore {
+    val sp = EncryptedSharedPreferences.create(
+        context,
+        "encrypted_prefs",
+        MasterKey.Builder(context).setKeyScheme(MasterKey.KeyScheme.AES256_GCM)
+            .build(),
+        EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+        EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+    )
+
+    override var teslaRefreshToken: String?
+        get() = sp.getString(
+            "tesla_refresh_token", null
+        )
+        set(value) {
+            sp.edit().putString("tesla_refresh_token", value).apply()
+        }
+    override var teslaAccessToken: String?
+        get() = sp.getString("tesla_access_token", null)
+        set(value) {
+            sp.edit().putString("tesla_access_token", value).apply()
+        }
+    override var teslaAccessTokenExpiry: Long
+        get() = sp.getLong("tesla_access_token_expiry", -1)
+        set(value) {
+            sp.edit().putLong("tesla_access_token_expiry", value).apply()
+        }
+
+    var teslaEmail: String?
+        get() = sp.getString("tesla_email", null)
+        set(value) {
+            sp.edit().putString("tesla_email", value).apply()
+        }
+}

app/src/main/java/net/vonforst/evmap/viewmodel/FavoritesViewModel.kt

@@ -7,9 +7,9 @@ import kotlinx.coroutines.async
 import kotlinx.coroutines.awaitAll
 import kotlinx.coroutines.launch
 import net.vonforst.evmap.adapter.Equatable
+import net.vonforst.evmap.api.availability.AvailabilityRepository
 import net.vonforst.evmap.api.availability.ChargeLocationStatus
 import net.vonforst.evmap.api.availability.ChargepointStatus
-import net.vonforst.evmap.api.availability.getAvailability
 import net.vonforst.evmap.model.ChargeLocation
 import net.vonforst.evmap.model.Favorite
 import net.vonforst.evmap.model.FavoriteWithDetail
@@ -19,6 +19,7 @@ import net.vonforst.evmap.utils.distanceBetween
 class FavoritesViewModel(application: Application) :
     AndroidViewModel(application) {
     private var db = AppDatabase.getInstance(application)
+    private val availabilityRepo = AvailabilityRepository(application)
 
     val favorites: LiveData<List<FavoriteWithDetail>> by lazy {
         db.favoritesDao().getAllFavorites()
@@ -53,7 +54,7 @@ class FavoritesViewModel(application: Application) :
 
             chargers.map { charger ->
                 async {
-                    data[charger.id] = getAvailability(charger)
+                    data[charger.id] = availabilityRepo.getAvailability(charger)
                     availability.value = data
                 }
             }.awaitAll()

app/src/main/java/net/vonforst/evmap/viewmodel/MapViewModel.kt

@@ -14,8 +14,8 @@ import kotlinx.coroutines.withContext
 import kotlinx.parcelize.Parcelize
 import net.vonforst.evmap.R
 import net.vonforst.evmap.api.availability.AvailabilityDetectorException
+import net.vonforst.evmap.api.availability.AvailabilityRepository
 import net.vonforst.evmap.api.availability.ChargeLocationStatus
-import net.vonforst.evmap.api.availability.getAvailability
 import net.vonforst.evmap.api.createApi
 import net.vonforst.evmap.api.equivalentPlugTypes
 import net.vonforst.evmap.api.fronyx.FronyxApi
@@ -59,6 +59,7 @@ class MapViewModel(application: Application, private val state: SavedStateHandle
         db,
         prefs
     )
+    private val availabilityRepo = AvailabilityRepository(application)
 
     val apiId = repo.api.map { it.id }
 
@@ -202,7 +203,7 @@ class MapViewModel(application: Application, private val state: SavedStateHandle
                 triggerAvailabilityRefresh.switchMap {
                     liveData {
                         emit(Resource.loading(null))
-                        emit(getAvailability(charger))
+                        emit(availabilityRepo.getAvailability(charger))
                     }
                 }
             }

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

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout 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"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:orientation="vertical">
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/toolbar_container"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:fitsSystemWindows="true">
+
+        <com.google.android.material.appbar.MaterialToolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?android:actionBarSize" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+    <WebView
+        android:id="@+id/webView"
+        android:layout_height="match_parent"
+        android:layout_width="match_parent" />
+</LinearLayout>

app/src/main/res/navigation/nav_graph.xml

@@ -169,4 +169,15 @@
             app:popUpTo="@id/onboarding"
             app:popUpToInclusive="true" />
     </fragment>
+    <fragment
+        android:id="@+id/oauth_login"
+        android:name="net.vonforst.evmap.fragment.oauth.OAuthLoginFragment"
+        android:label="@string/login">
+        <argument
+            android:name="url"
+            app:argType="string" />
+        <argument
+            android:name="resultUrlPrefix"
+            app:argType="string" />
+    </fragment>
 </navigation>

app/src/main/res/values-de/strings.xml

@@ -296,4 +296,12 @@
     <string name="compass">Kompass</string>
     <string name="charger_website">Website</string>
     <string name="location_status">Standortdienste-Status</string>
+    <string name="pref_tesla_account">Tesla-Account</string>
+    <string name="pref_tesla_account_enabled">Angemeldet als %s</string>
+    <string name="pref_tesla_account_disabled">Anmelden, um Echtzeitdaten für Tesla Supercharger zu sehen. Kein Tesla-Fahrzeug notwendig</string>
+    <string name="logging_in">Anmelden…</string>
+    <string name="log_out">Abmelden</string>
+    <string name="logged_out">Abgemeldet</string>
+    <string name="login">Login</string>
+    <string name="login_error">Login fehlgeschlagen</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -296,4 +296,12 @@
     <string name="compass">Compass</string>
     <string name="charger_website">Website</string>
     <string name="location_status">Location provider status</string>
+    <string name="pref_tesla_account">Tesla account</string>
+    <string name="pref_tesla_account_enabled">Logged in as %s</string>
+    <string name="pref_tesla_account_disabled">Log in to see real-time data for Tesla Superchargers. No Tesla vehicle necessary</string>
+    <string name="logging_in">Logging in…</string>
+    <string name="log_out">Log out</string>
+    <string name="logged_out">Logged out</string>
+    <string name="login">Login</string>
+    <string name="login_error">Login failed</string>
 </resources>

app/src/main/res/xml/settings_data.xml

@@ -15,6 +15,10 @@
             android:title="@string/pref_prediction_enabled"
             android:defaultValue="true"
             android:summary="@string/pref_prediction_enabled_summary" />
+
+        <Preference
+            android:key="tesla_account"
+            android:title="@string/pref_tesla_account" />
     </PreferenceCategory>
     <PreferenceCategory android:title="@string/settings_map">