refactor(HasAccountID): add HasAccountID.java back

mastodon/src/main/java/org/joinmastodon/android/fragments/HasAccountID.java

@@ -0,0 +1,32 @@
+package org.joinmastodon.android.fragments;
+
+import org.joinmastodon.android.api.session.AccountLocalPreferences;
+import org.joinmastodon.android.api.session.AccountSession;
+import org.joinmastodon.android.api.session.AccountSessionManager;
+import org.joinmastodon.android.model.Instance;
+
+import java.util.Optional;
+
+public interface HasAccountID {
+	String getAccountID();
+
+	default AccountSession getSession() {
+		return AccountSessionManager.getInstance().getAccount(getAccountID());
+	}
+
+	default boolean isInstanceAkkoma() {
+		return getInstance().map(Instance::isAkkoma).orElse(false);
+	}
+
+	default boolean isInstancePixelfed() {
+		return getInstance().map(Instance::isPixelfed).orElse(false);
+	}
+
+	default Optional<Instance> getInstance() {
+		return getSession().getInstance();
+	}
+
+	default AccountLocalPreferences getLocalPrefs() {
+		return AccountSessionManager.get(getAccountID()).getLocalPreferences();
+	}
+}