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package db.sql.api.impl.cmd.struct;

import db.sql.api.Cmd;
import db.sql.api.SqlBuilderContext;
import db.sql.api.cmd.basic.IDataset;
import db.sql.api.cmd.basic.IDatasetField;
import db.sql.api.cmd.struct.IFrom;
import db.sql.api.impl.tookit.Lists;
import db.sql.api.impl.tookit.SqlConst;
import db.sql.api.tookit.CmdUtils;

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

public class From implements IFrom {

    private final List tables = new ArrayList<>();

    public , DATASET_FIELD extends IDatasetField> From append(DATASET... tables) {
        Lists.merge(this.tables, tables);
        return this;
    }

    @Override
    public List getTables() {
        return tables;
    }

    @Override
    public StringBuilder sql(Cmd module, Cmd parent, SqlBuilderContext context, StringBuilder sqlBuilder) {
        sqlBuilder.append(SqlConst.FROM);
        return CmdUtils.join(module, this, context, sqlBuilder, this.tables, SqlConst.DELIMITER);
    }

    @Override
    public boolean contain(Cmd cmd) {
        return CmdUtils.contain(cmd, this.tables);
    }
}