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Mustache scripting integration for Elasticsearch
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/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the Elastic License
 * 2.0 and the Server Side Public License, v 1; you may not use this file except
 * in compliance with, at your election, the Elastic License 2.0 or the Server
 * Side Public License, v 1.
 */

package org.elasticsearch.script.mustache;

import org.elasticsearch.action.ActionRequest;
import org.elasticsearch.action.ActionResponse;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.IndexScopedSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.settings.SettingsFilter;
import org.elasticsearch.plugins.ActionPlugin;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.plugins.ScriptPlugin;
import org.elasticsearch.plugins.SearchPlugin;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestHandler;
import org.elasticsearch.script.ScriptContext;
import org.elasticsearch.script.ScriptEngine;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.function.Supplier;

public class MustachePlugin extends Plugin implements ScriptPlugin, ActionPlugin, SearchPlugin {

    @Override
    public ScriptEngine getScriptEngine(Settings settings, Collection> contexts) {
        return new MustacheScriptEngine(settings);
    }

    @Override
    public List> getActions() {
        return Arrays.asList(
            new ActionHandler<>(SearchTemplateAction.INSTANCE, TransportSearchTemplateAction.class),
            new ActionHandler<>(MultiSearchTemplateAction.INSTANCE, TransportMultiSearchTemplateAction.class)
        );
    }

    @Override
    public List getRestHandlers(
        Settings settings,
        RestController restController,
        ClusterSettings clusterSettings,
        IndexScopedSettings indexScopedSettings,
        SettingsFilter settingsFilter,
        IndexNameExpressionResolver indexNameExpressionResolver,
        Supplier nodesInCluster
    ) {
        return Arrays.asList(
            new RestSearchTemplateAction(),
            new RestMultiSearchTemplateAction(settings),
            new RestRenderSearchTemplateAction()
        );
    }
}