implement fetching listings from remote instances

mastodon/src/main/java/org/joinmastodon/android/model/Account.java

@@ -1,7 +1,10 @@
 package org.joinmastodon.android.model;
 
+import android.net.Uri;
 import android.text.TextUtils;
 
+import androidx.annotation.Nullable;
+
 import org.joinmastodon.android.api.ObjectValidationException;
 import org.joinmastodon.android.api.RequiredField;
 import org.parceler.Parcel;
@@ -135,6 +138,8 @@ public class Account extends BaseModel implements Searchable{
 
 	public List<Role> roles;
 
+	public @Nullable String fqn; // akkoma has this, mastodon't
+
 	@Override
 	public String getQuery() {
 		return url;
@@ -162,6 +167,7 @@ public class Account extends BaseModel implements Searchable{
 			moved.postprocess();
 		if(TextUtils.isEmpty(displayName))
 			displayName=username;
+		if(fqn == null) fqn = getFullyQualifiedName();
 	}
 
 	public boolean isLocal(){
@@ -173,6 +179,10 @@ public class Account extends BaseModel implements Searchable{
 		return parts.length==1 ? null : parts[1];
 	}
 
+	public String getDomainFromURL() {
+		return Uri.parse(url).getHost();
+	}
+
 	public String getDisplayUsername(){
 		return '@'+acct;
 	}
@@ -181,6 +191,10 @@ public class Account extends BaseModel implements Searchable{
 		return '@'+acct.split("@")[0];
 	}
 
+	public String getFullyQualifiedName() {
+		return fqn != null ? fqn : acct.split("@")[0] + "@" + getDomainFromURL();
+	}
+
 	@Override
 	public String toString(){
 		return "Account{"+

mastodon/src/main/java/org/joinmastodon/android/model/BaseModel.java

@@ -11,6 +11,14 @@ import androidx.annotation.CallSuper;
 import androidx.annotation.NonNull;
 
 public abstract class BaseModel implements Cloneable{
+
+	/**
+	 * indicates the profile has been fetched from a foreign instance.
+	 *
+	 * @see MastodonAPIRequest#execRemote
+	 */
+	public transient boolean isRemote;
+
 	@CallSuper
 	public void postprocess() throws ObjectValidationException{
 		try{