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/*
 * Copyright 2019 Red Hat
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.apicurio.datamodels.cmd.commands;

import java.util.ArrayList;
import java.util.List;

import com.fasterxml.jackson.databind.annotation.JsonDeserialize;

import io.apicurio.datamodels.Library;
import io.apicurio.datamodels.cmd.AbstractCommand;
import io.apicurio.datamodels.cmd.util.ModelUtils;
import io.apicurio.datamodels.compat.JsonCompat;
import io.apicurio.datamodels.compat.LoggerCompat;
import io.apicurio.datamodels.compat.MarshallCompat.NullableJsonNodeDeserializer;
import io.apicurio.datamodels.core.Constants;
import io.apicurio.datamodels.core.models.Document;
import io.apicurio.datamodels.core.models.NodePath;
import io.apicurio.datamodels.openapi.models.OasSchema;

/**
 * A command used to delete all properties from a schema.
 * @author [email protected]
 */
public class DeleteAllPropertiesCommand extends AbstractCommand {

    public NodePath _schemaPath;

    @JsonDeserialize(contentUsing=NullableJsonNodeDeserializer.class)
    public List _oldProperties;

    DeleteAllPropertiesCommand() {
    }
    
    DeleteAllPropertiesCommand(OasSchema schema) {
        this._schemaPath = Library.createNodePath(schema);
    }
    
    /**
     * @see io.apicurio.datamodels.cmd.ICommand#execute(io.apicurio.datamodels.core.models.Document)
     */
    @Override
    public void execute(Document document) {
        LoggerCompat.info("[DeleteAllPropertiesCommand] Executing.");
        this._oldProperties = new ArrayList<>();

        OasSchema schema = (OasSchema) this._schemaPath.resolve(document);

        if (this.isNullOrUndefined(schema)) {
            return;
        }

        schema.getPropertyNames().forEach( pname -> {
            Object data = JsonCompat.objectNode();
            JsonCompat.setPropertyString(data, Constants.PROP_NAME, pname);
            JsonCompat.setProperty(data, Constants.PROP_SCHEMA, Library.writeNode(schema.removeProperty(pname)));
            JsonCompat.setPropertyBoolean(data, Constants.PROP_REQUIRED, this.isPropertyRequired(schema, pname));
            this._oldProperties.add(data);
        });
        schema.required = null;
    }
    
    /**
     * @see io.apicurio.datamodels.cmd.ICommand#undo(io.apicurio.datamodels.core.models.Document)
     */
    @Override
    public void undo(Document document) {
        LoggerCompat.info("[DeleteAllPropertiesCommand] Reverting.");
        if (this.isNullOrUndefined(this._oldProperties) || this._oldProperties.size() == 0) {
            return;
        }

        OasSchema schema = (OasSchema) this._schemaPath.resolve(document);
        if (this.isNullOrUndefined(schema)) {
            return;
        }

        if (this.isNullOrUndefined(schema.required)) {
            schema.required = new ArrayList<>();
        }

        this._oldProperties.forEach( oldProp -> {
            String name = JsonCompat.getPropertyString(oldProp, Constants.PROP_NAME);
            Object schemaObj = JsonCompat.getProperty(oldProp, Constants.PROP_SCHEMA);
            Boolean required = JsonCompat.getPropertyBoolean(oldProp, Constants.PROP_REQUIRED);
            
            OasSchema prop = schema.createPropertySchema(name);
            Library.readNode(schemaObj, prop);
            schema.addProperty(name, prop);
            if (ModelUtils.isDefined(required) && required == Boolean.TRUE) {
                schema.required.add(name);
            }
        });        
    }

    /**
     * Returns true if the property is required.
     * @param schema
     * @param propertyName
     */
    private boolean isPropertyRequired(OasSchema schema, String propertyName) {
        return ModelUtils.isDefined(schema.required) && schema.required.indexOf(propertyName) != -1;
    }

}
    

    

    

            

    

            



    
    






    
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