Fix authentication error buttons

app/src/main/java/org/tasks/caldav/CaldavSynchronizer.kt

@@ -30,6 +30,7 @@ import org.tasks.analytics.Firebase
 import org.tasks.billing.Inventory
 import org.tasks.caldav.iCalendar.Companion.fromVtodo
 import org.tasks.data.CaldavAccount
+import org.tasks.data.CaldavAccount.Companion.ERROR_UNAUTHORIZED
 import org.tasks.data.CaldavCalendar
 import org.tasks.data.CaldavDao
 import org.tasks.data.CaldavTask
@@ -69,11 +70,11 @@ class CaldavSynchronizer @Inject constructor(
             return
         }
         if (isNullOrEmpty(account.password)) {
-            setError(account, context.getString(if (account.isTasksOrg) {
-                R.string.authentication_required
+            setError(account, if (account.isTasksOrg) {
+                ERROR_UNAUTHORIZED
             } else {
-                R.string.password_required
-            }))
+                context.getString(R.string.password_required)
+            })
             return
         }
         try {

app/src/main/java/org/tasks/data/CaldavAccount.kt

@@ -175,11 +175,9 @@ class CaldavAccount : Parcelable {
                 !isLoggedOut()
     }
 
-    fun isLoggedOut(): Boolean =
-            error?.startsWith("HTTP ${HttpURLConnection.HTTP_UNAUTHORIZED}") == true
+    fun isLoggedOut() = error?.startsWith(ERROR_UNAUTHORIZED) == true
 
-    fun isPaymentRequired(): Boolean =
-            error?.startsWith("HTTP ${HttpURLConnection.HTTP_PAYMENT_REQUIRED}") == true
+    fun isPaymentRequired() = error?.startsWith(EROR_PAYMENT_REQUIRED) == true
 
     companion object {
         const val TYPE_CALDAV = 0
@@ -189,6 +187,9 @@ class CaldavAccount : Parcelable {
         const val TYPE_TASKS = 4
         const val TYPE_ETEBASE = 5
 
+        const val ERROR_UNAUTHORIZED = "HTTP ${HttpURLConnection.HTTP_UNAUTHORIZED}"
+        const val EROR_PAYMENT_REQUIRED = "HTTP ${HttpURLConnection.HTTP_PAYMENT_REQUIRED}"
+
         fun String?.openTaskType(): String? = this?.split(":")?.get(0)
 
         @JvmField val CREATOR: Parcelable.Creator<CaldavAccount> = object : Parcelable.Creator<CaldavAccount> {

app/src/main/java/org/tasks/preferences/fragments/TasksAccount.kt

@@ -152,8 +152,8 @@ class TasksAccount : InjectingPreferenceFragment() {
                         setOnPreferenceClickListener {
                             showPurchaseDialog()
                         }
-                        if (subscription == null) {
-                            setTitle(R.string.upgrade_to_pro)
+                        if (subscription == null || subscription.isTasksSubscription) {
+                            setTitle(R.string.button_subscribe)
                             setSummary(R.string.your_subscription_expired)
                         } else {
                             setTitle(R.string.manage_subscription)
@@ -203,10 +203,11 @@ class TasksAccount : InjectingPreferenceFragment() {
         findPreference(R.string.upgrade_to_pro).apply {
             title = getString(
                     if (subscription == null) {
-                        R.string.upgrade_to_pro
+                        R.string.button_subscribe
                     } else {
                         R.string.manage_subscription
-                    })
+                    }
+            )
             summary = if (subscription == null) {
                 null
             } else {