Add NFC ticket scanning

.gitmodules

@@ -5,3 +5,6 @@
 [submodule "pretixscan/libpretixui-repo"]
 	path = pretixscan/libpretixui-repo
 	url = https://github.com/pretix/libpretixui-android.git
+[submodule "pretixscan/libpretixnfc-repo"]
+	path = pretixscan/libpretixnfc-repo
+	url = https://github.com/pretix/libpretixnfc.git

pretixscan/app/build.gradle

@@ -172,6 +172,17 @@ dependencies {
     implementation(project(':libpretixsync')) {
         transitive = false
     }
+
+    // libpretixnfc
+    implementation(project(':libpretixnfc')) {
+        transitive = true
+    }
+
+    // libpretixnfc-android
+    implementation(project(':libpretixnfc-android')) {
+        transitive = true
+    }
+
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 }
 

pretixscan/app/src/main/AndroidManifest.xml

@@ -102,6 +102,8 @@
             android:exported="false"
             android:theme="@style/AppTheme.NoActionBar" />
 
+        <service android:name="eu.pretix.libpretixnfc.android.hardware.acs.AcsReaderService"  android:foregroundServiceType="connectedDevice" />
+
         <provider
             android:name="androidx.core.content.FileProvider"
             android:authorities="${applicationId}.fileprovider"

pretixscan/app/src/main/java/eu/pretix/pretixscan/droid/AppConfig.kt

@@ -13,6 +13,8 @@ import com.fasterxml.jackson.module.kotlin.KotlinFeature
 import com.fasterxml.jackson.module.kotlin.KotlinModule
 import eu.pretix.libpretixsync.api.PretixApi
 import eu.pretix.libpretixsync.config.ConfigStore
+import eu.pretix.libpretixnfc.android.platform.AndroidKeyStore
+import eu.pretix.libpretixnfc.platform.HardwareBackedKeyStore
 import eu.pretix.pretixscan.utils.KeystoreHelper
 import org.joda.time.DateTime
 import org.json.JSONObject
@@ -409,6 +411,14 @@ class AppConfig(ctx: Context) : ConfigStore {
         default_prefs.edit().putStringSet(PREFS_KEY_KNOWN_LIVE_EVENT_SLUGS, slugs).apply()
     }
 
+    var nfcReaderType: String
+        get() = default_prefs.getString(PREFS_KEY_NFC_READER_TYPE, "native") ?: "native"
+        set(value) = default_prefs.edit().putString(PREFS_KEY_NFC_READER_TYPE, value).apply()
+
+    val keyStore: HardwareBackedKeyStore by lazy {
+        AndroidKeyStore(ctx.applicationContext as PretixScan)
+    }
+
     companion object {
         val PREFS_NAME = "pretixdroid"
         val PREFS_KEY_API_URL = "pretix_api_url"
@@ -455,6 +465,7 @@ class AppConfig(ctx: Context) : ConfigStore {
         val PREFS_KEY_SEARCH_DISABLE = "pref_search_disable"
         val PREFS_KEY_KIOSK_MODE = "pref_kiosk_mode"
         val PREFS_KEY_MULTI_EVENT_MODE = "multi_event_mode"
+        val PREFS_KEY_NFC_READER_TYPE = "pref_nfc_type"
         private const val PREFS_KEY_KNOWN_LIVE_EVENT_SLUGS = "cache_known_live_event_slugs"
         private const val PREFS_KEY_SCREEN_ALWAYS_ON = "pref_screen_always_on"
     }

pretixscan/app/src/main/java/eu/pretix/pretixscan/droid/ui/UnpaidOrderDialogHelper.kt

@@ -1,25 +1,25 @@
 package eu.pretix.pretixscan.droid.ui
 
 import android.app.Activity
-import android.app.Dialog
 import android.content.DialogInterface
 import android.content.Intent
 import android.view.WindowManager
 import androidx.appcompat.app.AlertDialog
 import eu.pretix.libpretixsync.check.TicketCheckProvider
 import eu.pretix.libpretixsync.db.Answer
+import eu.pretix.libpretixsync.db.ReusableMediaType
 import eu.pretix.libpretixui.android.questions.QuestionsDialogInterface
 import eu.pretix.pretixscan.droid.R
 
 
-class UnpaidDialog(ctx: Activity, val secret: String, val answers: MutableList<Answer>?,
-                   val retryHandler: ((String, MutableList<Answer>?, Boolean) -> Unit)) : AlertDialog(ctx), QuestionsDialogInterface {
+class UnpaidDialog(ctx: Activity, val secret: String, val sourceType: ReusableMediaType, val answers: MutableList<Answer>?,
+                   val retryHandler: ((String, ReusableMediaType, MutableList<Answer>?, Boolean) -> Unit)) : AlertDialog(ctx), QuestionsDialogInterface {
     init {
         setTitle(R.string.dialog_unpaid_title)
         setMessage(ctx.getString(R.string.dialog_unpaid_text))
         setButton(DialogInterface.BUTTON_POSITIVE, ctx.getString(R.string.dialog_unpaid_retry)) { p0, p1 ->
             dismiss()
-            retryHandler(secret, answers, true)
+            retryHandler(secret, sourceType, answers, true)
         }
         setButton(DialogInterface.BUTTON_NEGATIVE, ctx.getString(eu.pretix.libpretixui.android.R.string.cancel)) { p0, p1 ->
             cancel()
@@ -31,10 +31,13 @@ class UnpaidDialog(ctx: Activity, val secret: String, val answers: MutableList<A
     }
 }
 
-fun showUnpaidDialog(ctx: Activity, res: TicketCheckProvider.CheckResult,
-                     secret: String, answers: MutableList<Answer>?,
-                     retryHandler: ((String, MutableList<Answer>?, Boolean) -> Unit)): QuestionsDialogInterface {
-    val dialog = UnpaidDialog(ctx, secret, answers, retryHandler)
+fun showUnpaidDialog(ctx: Activity,
+                     res: TicketCheckProvider.CheckResult,
+                     secret: String,
+                     sourceType: ReusableMediaType,
+                     answers: MutableList<Answer>?,
+                     retryHandler: ((String, ReusableMediaType, MutableList<Answer>?, Boolean) -> Unit)): QuestionsDialogInterface {
+    val dialog = UnpaidDialog(ctx, secret, sourceType, answers, retryHandler)
     dialog.show()
     return dialog
 }

pretixscan/app/src/main/java/eu/pretix/pretixscan/utils/Settings.kt

@@ -0,0 +1,13 @@
+package eu.pretix.pretixscan.utils
+
+import android.app.Application
+import eu.pretix.libpretixsync.models.Settings
+import eu.pretix.libpretixsync.models.db.toModel
+import eu.pretix.libpretixsync.utils.SettingsManager
+import eu.pretix.pretixscan.droid.PretixScan
+
+class SettingsManager(private val application: Application): SettingsManager {
+    override fun getBySlug(eventSlug: String): Settings? {
+        return (application as PretixScan).db.settingsQueries.selectBySlug(eventSlug).executeAsOneOrNull()?.toModel()
+    }
+}

pretixscan/settings.gradle

@@ -12,9 +12,11 @@ plugins {
     id 'org.gradle.toolchains.foojay-resolver-convention' version '0.8.0'
 }
 
-include ':app', ':libpretixsync', ':libpretixui-android', ':android-libserenegiantcommon', ':android-libusbcameracommon', ':android-libuvccamera'
+include ':app', ':libpretixsync', ':libpretixui-android', ':libpretixnfc', ':libpretixnfc-android', ':android-libserenegiantcommon', ':android-libusbcameracommon', ':android-libuvccamera'
 project(':libpretixsync').projectDir = new File('libpretixsync-repo/libpretixsync')
 project(':libpretixui-android').projectDir = new File('libpretixui-repo/libpretixui-android')
+project(':libpretixnfc').projectDir = new File('libpretixnfc-repo/libpretixnfc')
+project(':libpretixnfc-android').projectDir = new File('libpretixnfc-repo/libpretixnfc-android')
 project(':android-libserenegiantcommon').projectDir = new File('libpretixui-repo/android-libserenegiantcommon')
 project(':android-libusbcameracommon').projectDir = new File('libpretixui-repo/android-libusbcameracommon')
 project(':android-libuvccamera').projectDir = new File('libpretixui-repo/android-libuvccamera')