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/*
 * LensKit, an open source recommender systems toolkit.
 * Copyright 2010-2014 LensKit Contributors.  See CONTRIBUTORS.md.
 * Work on LensKit has been funded by the National Science Foundation under
 * grants IIS 05-34939, 08-08692, 08-12148, and 10-17697.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.lenskit.gradle.traits

import org.gradle.api.Project
import org.lenskit.gradle.delegates.TextDataSourceConfig

/**
 * Support for specifying various types of data sources.
 */
trait DataSources {
    abstract Project getProject()

    /**
     * Configure a text file data source.
     * @param block The configuration block, used to configure a data source.
     * @return A JSON specification of a text file data source.
     */
    def textFile(@DelegatesTo(TextDataSourceConfig) Closure block) {
        project.logger.warn('textFile is deprecated')
        def spec = new TextDataSourceConfig(project)
        spec.configure(block)
        return spec.json
    }

    /**
     * Configure a rating CSV file data source.
     * @param fn The file to use.
     * @return A JSON specification of a text file data source.
     */
    def textFile(Object fn) {
        project.logger.warn('textFile is deprecated')
        return [type: 'textfile', file: project.uri(fn).toString(),
                format: 'csv', event_type: 'rating']
    }
}