ReportsRestImpl.java

/*
   Copyright 2014 base2Services

   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 com.base2.example.war.rest;

import com.base2.kagura.core.ExportHandler;
import com.base2.kagura.core.report.configmodel.ReportConfig;
import com.base2.kagura.core.report.configmodel.parts.ColumnDef;
import com.base2.kagura.core.report.connectors.ReportConnector;
import com.base2.kagura.rest.ReportsRest;
import com.base2.kagura.rest.exceptions.AuthenticationException;
import com.base2.kagura.rest.helpers.ParameterUtils;
import com.base2.kagura.rest.model.Parameters;
import com.base2.kagura.rest.model.ReportDetails;
import com.base2.kagura.rest.model.ReportDetailsAndResults;

import javax.ws.rs.*;

import javax.enterprise.context.RequestScoped;
import javax.inject.Inject;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @author aubels
 *         Date: 26/08/13
 */
@Path("/report/{authToken}/{reportName}")
@RequestScoped
public class ReportsRestImpl extends ReportsRest implements Serializable {

    String reportName;

    @PathParam("reportName")
    public String getReportName() {
        return reportName;
    }

    @PathParam("reportName")
    public void setReportName(String reportName) {
        this.reportName = reportName;
    }

    @PathParam("authToken")
    String authToken;

    public String getAuthToken() {
        return authToken;
    }

    public void setAuthToken(String authToken) {
        this.authToken = authToken;
    }

    @Inject
    private KaguraBean kaguraBean;

    @Override
    public ReportDetails reportDetails()
    {
        if (!kaguraBean.userHasAccess(reportName)) return kaguraBean.noSuchReport(reportName, new ReportDetails());
        return kaguraBean.getReportDetails(reportName, true, new ReportDetails());
    }

    @Override
    public ReportDetailsAndResults runReport(
            boolean allpages,
            Integer pageLimit,
            int page,
            Parameters parameters
    ) throws AuthenticationException {
        ReportDetailsAndResults result = new ReportDetailsAndResults();
        if (kaguraBean.getUser() == null) throw new AuthenticationException();
        if (!kaguraBean.userHasAccess(reportName)) return kaguraBean.noSuchReport(reportName, result);
        ReportConnector reportConnector = kaguraBean.getConnector(reportName);
        if (reportConnector == null)
        {
            result.setErrors(new ArrayList<String>() {{
                add("Report error.");
            }});
            return result;
        }
        reportConnector.setPage(page);
        List<String> errors = new ArrayList<String>();
        if (allpages)
        {
            reportConnector.setPageLimit(KaguraBean.EXPORT_PAGE_LIMIT);
            reportConnector.setPage(0);
        }
        else
            if (pageLimit != null && pageLimit > 0)
                reportConnector.setPageLimit(Math.min(KaguraBean.EXPORT_PAGE_LIMIT, pageLimit));
        ParameterUtils.insertParameters(parameters, reportConnector, errors);
        reportConnector.run(kaguraBean.generateExtraRunOptions());
        errors.addAll(reportConnector.getErrors());
        List<ColumnDef> columns = reportConnector.getColumns();
        List<Map<String, Object>> rows = reportConnector.getRows();
        result.setColumns(columns);
        result.setRows(rows);
        result.setErrors(errors);
        return result;
    }

    @Override
    public ReportDetailsAndResults detailsAndRunReport(
            boolean allpages,
            Integer pageLimit,
            int page,
            Parameters parameters
    ) throws AuthenticationException {
        if (kaguraBean.getUser() == null) throw new AuthenticationException("Authentication failure");
        if (!kaguraBean.userHasAccess(reportName)) return kaguraBean.noSuchReport(reportName, new ReportDetailsAndResults());
        ReportConfig reportConfig = kaguraBean.getReportConfig(reportName);
        ReportConnector reportConnector = reportConfig.getReportConnector();
        if (reportConnector == null)
        {
            return new ReportDetailsAndResults()
            {{
                setErrors(new ArrayList<String>() {{
                    add("Report error.");
                }});
            }};
        }
        reportConnector.setPage(page);
        List<String> errors = new ArrayList<String>();
        if (allpages)
        {
            reportConnector.setPageLimit(KaguraBean.EXPORT_PAGE_LIMIT);
            reportConnector.setPage(0);
        }
        else
        if (pageLimit != null && pageLimit > 0)
            reportConnector.setPageLimit(Math.min(KaguraBean.EXPORT_PAGE_LIMIT, pageLimit));
        final Map<String, Object> extra = kaguraBean.generateExtraRunOptions();
        reportConfig.prepareParameters(extra);
        ReportDetailsAndResults result = kaguraBean.getReportDetails(reportConfig, true, new ReportDetailsAndResults());
        ParameterUtils.insertParameters(parameters, reportConnector, errors);
        reportConnector.run(extra);
        errors.addAll(reportConnector.getErrors());
        List<ColumnDef> columns = reportConnector.getColumns();
        List<Map<String, Object>> rows = reportConnector.getRows();
        result.setColumns(columns);
        result.setRows(rows);
        result.setErrors(errors);
        return result;
    }

    @Override
    public InputStream exportReport(
            boolean allpages,
            String filetype,
            Integer pageLimit,
            int page,
            Parameters parameters
    ) throws AuthenticationException {
        if (kaguraBean.getUser() == null) throw new AuthenticationException("Authentication failure");
        if (!kaguraBean.userHasAccess(reportName)) return null;
        ExportHandler exportHandler = new ExportHandler();
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        ReportConnector reportConnector = kaguraBean.getConnector(reportName);
        try {
            List<String> errors = new ArrayList<String>();
            ParameterUtils.insertParameters(parameters, reportConnector, errors);
            reportConnector.setPage(page);
            if (allpages)
            {
                reportConnector.setPageLimit(KaguraBean.EXPORT_PAGE_LIMIT);
                reportConnector.setPage(0);
            }
            else
            if (pageLimit != null && pageLimit > 0)
                reportConnector.setPageLimit(Math.min(KaguraBean.EXPORT_PAGE_LIMIT, pageLimit));
            reportConnector.run(kaguraBean.generateExtraRunOptions());
            List<ColumnDef> columns = reportConnector.getColumns();
            List<Map<String, Object>> rows = reportConnector.getRows();
            if (filetype.equalsIgnoreCase("pdf"))
            {
                exportHandler.generatePdf(out, rows, columns);
            } else if (filetype.equalsIgnoreCase("csv"))
            {
                exportHandler.generateCsv(out, rows, columns);
            } else if (filetype.equalsIgnoreCase("xls"))
            {
                exportHandler.generateXls(out, rows, columns);
            }
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (IOException err) {
                err.printStackTrace();
            }
        }
        return new ByteArrayInputStream(out.toByteArray());
    }

}