include publish-options. prepare code for reconfiguration

src/main/java/eu/siacs/conversations/xml/Namespace.java

@@ -78,7 +78,7 @@ public final class Namespace {
     public static final String PUBSUB_PUBLISH_OPTIONS = PUBSUB + "#publish-options";
     public static final String PUBSUB_ERROR = PUBSUB + "#errors";
     public static final String PUB_SUB = "http://jabber.org/protocol/pubsub";
-    public static final String PUB_SUB_ERROR = PUB_SUB + "#errors";
+    public static final String PUB_SUB_ERRORS = PUB_SUB + "#errors";
     public static final String PUB_SUB_EVENT = PUB_SUB + "#event";
     public static final String PUB_SUB_OWNER = PUB_SUB + "#owner";
     public static final String PUB_SUB_PERSISTENT_ITEMS = PUB_SUB + "#persistent-items";

src/main/java/im/conversations/android/xmpp/IqErrorException.java

@@ -21,4 +21,8 @@ public class IqErrorException extends Exception {
         final var text = error == null ? null : error.getText();
         return text == null ? null : text.getContent();
     }
+
+    public Iq getResponse() {
+        return this.response;
+    }
 }

src/main/java/im/conversations/android/xmpp/NodeConfiguration.java

@@ -0,0 +1,106 @@
+package im.conversations.android.xmpp;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import com.google.common.collect.ImmutableMap;
+import java.util.Collection;
+import java.util.Map;
+import java.util.Set;
+
+public class NodeConfiguration implements Map<String, Object> {
+
+    private static final String PERSIST_ITEMS = "pubsub#persist_items";
+    private static final String ACCESS_MODEL = "pubsub#access_model";
+    private static final String SEND_LAST_PUBLISHED_ITEM = "pubsub#send_last_published_item";
+    private static final String MAX_ITEMS = "pubsub#max_items";
+    private static final String NOTIFY_DELETE = "pubsub#notify_delete";
+    private static final String NOTIFY_RETRACT = "pubsub#notify_retract";
+
+    public static final NodeConfiguration OPEN =
+            new NodeConfiguration(
+                    new ImmutableMap.Builder<String, Object>()
+                            .put(PERSIST_ITEMS, Boolean.TRUE)
+                            .put(ACCESS_MODEL, "open")
+                            .build());
+    public static final NodeConfiguration WHITELIST_MAX_ITEMS =
+            new NodeConfiguration(
+                    new ImmutableMap.Builder<String, Object>()
+                            .put(PERSIST_ITEMS, Boolean.TRUE)
+                            .put(ACCESS_MODEL, "whitelist")
+                            .put(SEND_LAST_PUBLISHED_ITEM, "never")
+                            .put(MAX_ITEMS, "max")
+                            .put(NOTIFY_DELETE, Boolean.TRUE)
+                            .put(NOTIFY_RETRACT, Boolean.TRUE)
+                            .build());
+    private final Map<String, Object> delegate;
+
+    private NodeConfiguration(Map<String, Object> map) {
+        this.delegate = map;
+    }
+
+    @Override
+    public int size() {
+        return this.delegate.size();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return this.delegate.isEmpty();
+    }
+
+    @Override
+    public boolean containsKey(@Nullable Object o) {
+        return this.delegate.containsKey(o);
+    }
+
+    @Override
+    public boolean containsValue(@Nullable Object o) {
+        return this.delegate.containsValue(o);
+    }
+
+    @Nullable
+    @Override
+    public Object get(@Nullable Object o) {
+        return this.delegate.get(o);
+    }
+
+    @Nullable
+    @Override
+    public Object put(String s, Object o) {
+        return this.delegate.put(s, o);
+    }
+
+    @Nullable
+    @Override
+    public Object remove(@Nullable Object o) {
+        return this.delegate.remove(o);
+    }
+
+    @Override
+    public void putAll(@NonNull Map<? extends String, ?> map) {
+        this.delegate.putAll(map);
+    }
+
+    @Override
+    public void clear() {
+        this.delegate.clear();
+    }
+
+    @NonNull
+    @Override
+    public Set<String> keySet() {
+        return this.delegate.keySet();
+    }
+
+    @NonNull
+    @Override
+    public Collection<Object> values() {
+        return this.delegate.values();
+    }
+
+    @NonNull
+    @Override
+    public Set<Entry<String, Object>> entrySet() {
+        return this.delegate.entrySet();
+    }
+}

src/main/java/im/conversations/android/xmpp/PreconditionNotMetException.java

@@ -0,0 +1,15 @@
+package im.conversations.android.xmpp;
+
+import im.conversations.android.xmpp.model.pubsub.error.PubSubError;
+import im.conversations.android.xmpp.model.stanza.Iq;
+
+public class PreconditionNotMetException extends PubSubErrorException {
+
+    public PreconditionNotMetException(final Iq response) {
+        super(response);
+        if (this.pubSubError instanceof PubSubError.PreconditionNotMet) {
+            return;
+        }
+        throw new AssertionError("This exception should only be constructed for PreconditionNotMet errors");
+    }
+}

src/main/java/im/conversations/android/xmpp/PubSubErrorException.java

@@ -0,0 +1,19 @@
+package im.conversations.android.xmpp;
+
+import im.conversations.android.xmpp.model.pubsub.error.PubSubError;
+import im.conversations.android.xmpp.model.stanza.Iq;
+
+public class PubSubErrorException extends IqErrorException {
+
+    protected final PubSubError pubSubError;
+
+    public PubSubErrorException(Iq response) {
+        super(response);
+        final var error = response.getError();
+        final var pubSubError = error == null ? null : error.getExtension(PubSubError.class);
+        if (pubSubError == null) {
+            throw new AssertionError("This exception should only be constructed for PubSubErrors");
+        }
+        this.pubSubError = pubSubError;
+    }
+}

src/main/java/im/conversations/android/xmpp/manager/AxolotlManager.java

@@ -11,6 +11,7 @@ import eu.siacs.conversations.xml.Namespace;
 import eu.siacs.conversations.xmpp.Jid;
 import im.conversations.android.database.AxolotlDatabaseStore;
 import im.conversations.android.xmpp.IqErrorException;
+import im.conversations.android.xmpp.NodeConfiguration;
 import im.conversations.android.xmpp.XmppConnection;
 import im.conversations.android.xmpp.axolotl.AxolotlAddress;
 import im.conversations.android.xmpp.model.axolotl.Bundle;
@@ -215,7 +216,11 @@ public class AxolotlManager extends AbstractManager {
         final var deviceList = new DeviceList();
         deviceList.setDeviceIds(deviceIds);
         return getManager(PubSubManager.class)
-                .publishSingleton(getAccount().address, deviceList, Namespace.AXOLOTL_DEVICE_LIST);
+                .publishSingleton(
+                        getAccount().address,
+                        deviceList,
+                        Namespace.AXOLOTL_DEVICE_LIST,
+                        NodeConfiguration.OPEN);
     }
 
     private ListenableFuture<Void> publishBundle() {
@@ -231,7 +236,8 @@ public class AxolotlManager extends AbstractManager {
                                     Namespace.AXOLOTL_BUNDLES,
                                     signalProtocolStore.getLocalRegistrationId());
                     return getManager(PubSubManager.class)
-                            .publishSingleton(getAccount().address, bundle, node);
+                            .publishSingleton(
+                                    getAccount().address, bundle, node, NodeConfiguration.OPEN);
                 },
                 MoreExecutors.directExecutor());
     }

src/main/java/im/conversations/android/xmpp/manager/PubSubManager.java

@@ -1,16 +1,24 @@
 package im.conversations.android.xmpp.manager;
 
 import android.content.Context;
+import androidx.annotation.NonNull;
+import com.google.common.util.concurrent.AsyncFunction;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
 import com.google.common.util.concurrent.MoreExecutors;
 import eu.siacs.conversations.xml.Namespace;
 import eu.siacs.conversations.xmpp.Jid;
 import im.conversations.android.xmpp.ExtensionFactory;
+import im.conversations.android.xmpp.IqErrorException;
+import im.conversations.android.xmpp.NodeConfiguration;
+import im.conversations.android.xmpp.PreconditionNotMetException;
+import im.conversations.android.xmpp.PubSubErrorException;
 import im.conversations.android.xmpp.XmppConnection;
 import im.conversations.android.xmpp.model.Extension;
 import im.conversations.android.xmpp.model.pubsub.Items;
 import im.conversations.android.xmpp.model.pubsub.PubSub;
+import im.conversations.android.xmpp.model.pubsub.PublishOptions;
+import im.conversations.android.xmpp.model.pubsub.error.PubSubError;
 import im.conversations.android.xmpp.model.pubsub.event.Event;
 import im.conversations.android.xmpp.model.pubsub.event.Purge;
 import im.conversations.android.xmpp.model.stanza.Iq;
@@ -164,34 +172,105 @@ public class PubSubManager extends AbstractManager {
         }
     }
 
-    public ListenableFuture<Void> publishSingleton(Jid address, Extension item) {
+    public ListenableFuture<Void> publishSingleton(
+            Jid address, Extension item, final NodeConfiguration nodeConfiguration) {
         final var id = ExtensionFactory.id(item.getClass());
-        return publish(address, item, SINGLETON_ITEM_ID, id.namespace);
+        return publish(address, item, SINGLETON_ITEM_ID, id.namespace, nodeConfiguration);
     }
 
-    public ListenableFuture<Void> publishSingleton(Jid address, Extension item, final String node) {
-        return publish(address, item, SINGLETON_ITEM_ID, node);
+    public ListenableFuture<Void> publishSingleton(
+            Jid address,
+            Extension item,
+            final String node,
+            final NodeConfiguration nodeConfiguration) {
+        return publish(address, item, SINGLETON_ITEM_ID, node, nodeConfiguration);
     }
 
-    public ListenableFuture<Void> publish(Jid address, Extension item, final String itemId) {
+    public ListenableFuture<Void> publish(
+            Jid address,
+            Extension item,
+            final String itemId,
+            final NodeConfiguration nodeConfiguration) {
         final var id = ExtensionFactory.id(item.getClass());
-        return publish(address, item, itemId, id.namespace);
+        return publish(address, item, itemId, id.namespace, nodeConfiguration);
     }
 
     public ListenableFuture<Void> publish(
             final Jid address,
             final Extension itemPayload,
             final String itemId,
-            final String node) {
+            final String node,
+            final NodeConfiguration nodeConfiguration) {
+        final var future = publishNoRetry(address, itemPayload, itemId, node, nodeConfiguration);
+        return Futures.catchingAsync(
+                future,
+                PreconditionNotMetException.class,
+                ex -> {
+                    LOGGER.info("Node {} on {} requires reconfiguration", node, address);
+                    final var reconfigurationFuture =
+                            reconfigureNode(address, node, nodeConfiguration);
+                    return Futures.transformAsync(
+                            reconfigurationFuture,
+                            ignored ->
+                                    publishNoRetry(
+                                            address, itemPayload, itemId, node, nodeConfiguration),
+                            MoreExecutors.directExecutor());
+                },
+                MoreExecutors.directExecutor());
+    }
+
+    private ListenableFuture<Void> publishNoRetry(
+            final Jid address,
+            final Extension itemPayload,
+            final String itemId,
+            final String node,
+            final NodeConfiguration nodeConfiguration) {
         final var iq = new Iq(Iq.Type.SET);
         iq.setTo(address);
         final var pubSub = iq.addExtension(new PubSub());
+        pubSub.addExtension(PublishOptions.of(nodeConfiguration));
         final var pubSubItemsWrapper = pubSub.addExtension(new PubSub.ItemsWrapper());
         pubSubItemsWrapper.setNode(node);
         final var item = pubSubItemsWrapper.addExtension(new PubSub.Item());
         item.setId(itemId);
         item.addExtension(itemPayload);
-        return Futures.transform(
-                connection.sendIqPacket(iq), result -> null, MoreExecutors.directExecutor());
+        final ListenableFuture<Void> iqFuture =
+                Futures.transform(
+                        connection.sendIqPacket(iq),
+                        result -> null,
+                        MoreExecutors.directExecutor());
+        return Futures.catchingAsync(
+                iqFuture,
+                IqErrorException.class,
+                new PubSubExceptionTransformer<>(),
+                MoreExecutors.directExecutor());
+    }
+
+    private ListenableFuture<Void> reconfigureNode(
+            final Jid address, final String node, final NodeConfiguration nodeConfiguration) {
+        
+        return Futures.immediateVoidFuture();
+    }
+
+    private static class PubSubExceptionTransformer<V>
+            implements AsyncFunction<IqErrorException, V> {
+
+        @Override
+        @NonNull
+        public ListenableFuture<V> apply(@NonNull IqErrorException ex) {
+            final var error = ex.getError();
+            if (error == null) {
+                return Futures.immediateFailedFuture(ex);
+            }
+            final PubSubError pubSubError = error.getExtension(PubSubError.class);
+            if (pubSubError instanceof PubSubError.PreconditionNotMet) {
+                return Futures.immediateFailedFuture(
+                        new PreconditionNotMetException(ex.getResponse()));
+            } else if (pubSubError != null) {
+                return Futures.immediateFailedFuture(new PubSubErrorException(ex.getResponse()));
+            } else {
+                return Futures.immediateFailedFuture(ex);
+            }
+        }
     }
 }

src/main/java/im/conversations/android/xmpp/model/data/Data.java

@@ -5,6 +5,7 @@ import com.google.common.collect.Iterables;
 import im.conversations.android.annotation.XmlElement;
 import im.conversations.android.xmpp.model.Extension;
 import java.util.Collection;
+import java.util.Map;
 
 @XmlElement(name = "x")
 public class Data extends Extension {
@@ -25,4 +26,37 @@ public class Data extends Extension {
         return Collections2.filter(
                 this.getExtensions(Field.class), f -> !FORM_TYPE.equals(f.getFieldName()));
     }
+
+    private void addField(final String name, final Object value) {
+        if (value == null) {
+            throw new IllegalArgumentException("Null values are not supported on data fields");
+        }
+        final var field = this.addExtension(new Field());
+        field.setFieldName(name);
+        final var valueExtension = field.addExtension(new Value());
+        if (value instanceof String) {
+            valueExtension.setContent((String) value);
+        } else if (value instanceof Integer) {
+            valueExtension.setContent(String.valueOf(value));
+        } else if (value instanceof Boolean) {
+            valueExtension.setContent(Boolean.TRUE.equals(value) ? "true" : "false");
+        } else {
+            throw new IllegalArgumentException(
+                    String.format(
+                            "%s is not a supported field value", value.getClass().getSimpleName()));
+        }
+    }
+
+    private void setFormType(final String formType) {
+        this.addField(FORM_TYPE, formType);
+    }
+
+    public static Data of(final String formType, final Map<String, Object> values) {
+        final var data = new Data();
+        data.setFormType(formType);
+        for (final Map.Entry<String, Object> entry : values.entrySet()) {
+            data.addField(entry.getKey(), entry.getValue());
+        }
+        return data;
+    }
 }

src/main/java/im/conversations/android/xmpp/model/data/Field.java

@@ -19,4 +19,8 @@ public class Field extends Extension {
     public Collection<String> getValues() {
         return Collections2.transform(getExtensions(Value.class), Element::getContent);
     }
+
+    public void setFieldName(String name) {
+        this.setAttribute("var", name);
+    }
 }

src/main/java/im/conversations/android/xmpp/model/error/Condition.java

@@ -6,7 +6,7 @@ import im.conversations.android.xmpp.model.Extension;
 
 public abstract class Condition extends Extension {
 
-    private Condition(Class<? extends Extension> clazz) {
+    private Condition(Class<? extends Condition> clazz) {
         super(clazz);
     }
 

src/main/java/im/conversations/android/xmpp/model/pubsub/PublishOptions.java

@@ -0,0 +1,21 @@
+package im.conversations.android.xmpp.model.pubsub;
+
+import eu.siacs.conversations.xml.Namespace;
+import im.conversations.android.annotation.XmlElement;
+import im.conversations.android.xmpp.NodeConfiguration;
+import im.conversations.android.xmpp.model.Extension;
+import im.conversations.android.xmpp.model.data.Data;
+
+@XmlElement
+public class PublishOptions extends Extension {
+
+    public PublishOptions() {
+        super(PublishOptions.class);
+    }
+
+    public static PublishOptions of(NodeConfiguration nodeConfiguration) {
+        final var publishOptions = new PublishOptions();
+        publishOptions.addExtension(Data.of(Namespace.PUB_SUB_PUBLISH_OPTIONS, nodeConfiguration));
+        return publishOptions;
+    }
+}

src/main/java/im/conversations/android/xmpp/model/pubsub/error/PubSubError.java

@@ -0,0 +1,19 @@
+package im.conversations.android.xmpp.model.pubsub.error;
+
+import im.conversations.android.annotation.XmlElement;
+import im.conversations.android.xmpp.model.Extension;
+
+public abstract class PubSubError extends Extension {
+
+    private PubSubError(Class<? extends PubSubError> clazz) {
+        super(clazz);
+    }
+
+    @XmlElement
+    public static class PreconditionNotMet extends PubSubError {
+
+        private PreconditionNotMet() {
+            super(PreconditionNotMet.class);
+        }
+    }
+}

src/main/java/im/conversations/android/xmpp/model/pubsub/error/package-info.java

@@ -0,0 +1,5 @@
+@XmlPackage(namespace = Namespace.PUB_SUB_ERRORS)
+package im.conversations.android.xmpp.model.pubsub.error;
+
+import eu.siacs.conversations.xml.Namespace;
+import im.conversations.android.annotation.XmlPackage;