Package de.sub.goobi.helper

Source Code of de.sub.goobi.helper.UghHelper

package de.sub.goobi.helper;

/**
* This file is part of the Goobi Application - a Workflow tool for the support of mass digitization.
*
* Visit the websites for more information.
*         - http://www.goobi.org
*         - http://launchpad.net/goobi-production
*         - http://gdz.sub.uni-goettingen.de
*       - http://www.intranda.com
*       - http://digiverso.com
*
* This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 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., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions
* of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to
* link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and
* distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and
* conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this
* library, you may extend this exception to your version of the library, but you are not obliged to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Iterator;
import java.util.List;

import javax.faces.context.FacesContext;
import javax.servlet.http.HttpSession;

import org.apache.log4j.Logger;

import ugh.dl.DocStruct;
import ugh.dl.Metadata;
import ugh.dl.MetadataType;
import ugh.dl.Prefs;
import ugh.exceptions.DocStructHasNoTypeException;
import ugh.exceptions.MetadataTypeNotAllowedException;
import de.sub.goobi.beans.Prozess;
import de.sub.goobi.config.ConfigMain;
import de.sub.goobi.helper.exceptions.UghHelperException;

public class UghHelper {
  private static final Logger myLogger = Logger.getLogger(UghHelper.class);

  /**
   * MetadataType aus Preferences eines Prozesses ermitteln
   *
   * @param inProzess
   * @param inName
   * @return MetadataType
   * @throws UghHelperException
   */
  public MetadataType getMetadataType(Prozess inProzess, String inName) throws UghHelperException {
    Prefs myPrefs = inProzess.getRegelsatz().getPreferences();
    return getMetadataType(myPrefs, inName);
  }

  /**
   * MetadataType aus Preferences ermitteln
   *
   * @param inPrefs
   * @param inName
   * @return MetadataType
   * @throws UghHelperException
   */
  public MetadataType getMetadataType(Prefs inPrefs, String inName) throws UghHelperException {
    MetadataType mdt = inPrefs.getMetadataTypeByName(inName);
    if (mdt == null) {
      throw new UghHelperException("MetadataType does not exist in current Preferences: " + inName);
    }
    return mdt;
  }

  /**
   * Metadata eines Docstructs ermitteln
   *
   * @param inStruct
   * @param inMetadataType
   * @return Metadata
   */
  public Metadata getMetadata(DocStruct inStruct, MetadataType inMetadataType) {
    if (inStruct != null && inMetadataType != null) {
      List<? extends Metadata> all = inStruct.getAllMetadataByType(inMetadataType);
      if (all.size() == 0) {
        try {
          Metadata md = new Metadata(inMetadataType);
          md.setDocStruct(inStruct);
          inStruct.addMetadata(md);

          return md;
        } catch (MetadataTypeNotAllowedException e) {
          myLogger.debug(e.getMessage());
          return null;
        }
      }
      if (all.size() != 0) {
        return all.get(0);
      } else {
        return null;
      }
    }
    return null;
  }

  /**
   * Metadata eines Docstructs ermitteln
   *
   * @param inStruct
   * @param inMetadataTypeAsString
   * @return Metadata
   * @throws UghHelperException
   */
  public Metadata getMetadata(DocStruct inStruct, Prefs inPrefs, String inMetadataType) throws UghHelperException {
    MetadataType mdt = getMetadataType(inPrefs, inMetadataType);
    List<? extends Metadata> all = inStruct.getAllMetadataByType(mdt);
    if (all.size() > 0) {
      try {
        Metadata md = new Metadata(mdt);
        md.setDocStruct(inStruct);
        inStruct.addMetadata(md);

        return md;
      } catch (MetadataTypeNotAllowedException e) {
        myLogger.error(e);
      }
    }
    return all.get(0);
  }

  /**
   * Metadata eines Docstructs ermitteln
   *
   * @param inStruct
   * @param inMetadataTypeAsString
   * @return Metadata
   * @throws UghHelperException
   */
  public Metadata getMetadata(DocStruct inStruct, Prozess inProzess, String inMetadataType) throws UghHelperException {
    MetadataType mdt = getMetadataType(inProzess, inMetadataType);
    List<? extends Metadata> all = inStruct.getAllMetadataByType(mdt);
    if (all.size() > 0) {
      try {
        Metadata md = new Metadata(mdt);
        md.setDocStruct(inStruct);
        inStruct.addMetadata(md);

        return md;
      } catch (MetadataTypeNotAllowedException e) {
        myLogger.error(e);
      }
    }
    return all.get(0);
  }

  private void addMetadatum(DocStruct inStruct, Prefs inPrefs, String inMetadataType, String inValue) {
    /* wenn kein Wert vorhanden oder das DocStruct null, dann gleich raus */
    if (inValue.equals("") || inStruct == null || inStruct.getType() == null) {
      return;
    }
    /* andernfalls dem DocStruct das passende Metadatum zuweisen */
    MetadataType mdt = inPrefs.getMetadataTypeByName(inMetadataType);
    try {
      Metadata md = new Metadata(mdt);
      md.setType(mdt);
      md.setValue(inValue);
      inStruct.addMetadata(md);
    } catch (DocStructHasNoTypeException e) {
      Helper.setMeldung(null, "DocStructHasNoTypeException: " + inStruct.getType().getName() + " - " + inMetadataType + " - " + inValue,
          e.getMessage());
      myLogger.error(e);
    } catch (MetadataTypeNotAllowedException e) {
      Helper.setMeldung(null, "MetadataTypeNotAllowedException: " + inStruct.getType().getName() + " - " + inMetadataType + " - " + inValue,
          e.getMessage());
      myLogger.error(e);
    } catch (Exception e) {
      Helper.setMeldung(null, "Exception: " + inStruct.getType().getName() + " - " + inMetadataType + " - " + inValue, e.getMessage());
      myLogger.error(e);
    }
  }

  public void replaceMetadatum(DocStruct inStruct, Prefs inPrefs, String inMetadataType, String inValue) {
    /* vorhandenes Element löschen */
    MetadataType mdt = inPrefs.getMetadataTypeByName(inMetadataType);
    if (mdt == null) {
      return;
    }
    if (inStruct != null && inStruct.getAllMetadataByType(mdt).size() > 0) {
      // TODO: Use for loops
      for (Iterator<? extends Metadata> iter = inStruct.getAllMetadataByType(mdt).iterator(); iter.hasNext();) {
        Metadata md = iter.next();
        inStruct.removeMetadata(md);
      }
    }
    /* Element neu hinzufügen */
    addMetadatum(inStruct, inPrefs, inMetadataType, inValue);
  }

  /**
   * @return
   */
  // TODO: Create a own class for iso 639 (?) Mappings or move this to UGH

  public String convertLanguage(String inLanguage) {
    /* Datei zeilenweise durchlaufen und die Sprache vergleichen */
    FacesContext context = FacesContext.getCurrentInstance();
    String filename;
    try {
      if (context != null) {
        HttpSession session = (HttpSession) context.getExternalContext().getSession(false);
        filename = session.getServletContext().getRealPath("/WEB-INF") + File.separator + "classes" + File.separator
            + "goobi_opacLanguages.txt";
      } else {
        filename = ConfigMain.getParameter("KonfigurationVerzeichnis") + "goobi_opacLanguages.txt";
      }
      FileInputStream fis = new FileInputStream(filename);
      InputStreamReader isr = new InputStreamReader(fis, "UTF8");
      BufferedReader in = new BufferedReader(isr);
      String str;
      while ((str = in.readLine()) != null) {
        if (str.length() > 0 && str.split(" ")[1].equals(inLanguage)) {
          in.close();
          return str.split(" ")[0];
        }
      }
      in.close();

    } catch (IOException e) {
    }
    return inLanguage;
  }

  /**
   * In einem String die Umlaute auf den Grundbuchstaben reduzieren ================================================================
   */
  // TODO: Try to replace this with a external library
  public String convertUmlaut(String inString) {
    String temp = inString;
    /* Pfad zur Datei ermitteln */
    FacesContext context = FacesContext.getCurrentInstance();
    String filename;

    if (context != null) {
      HttpSession session = (HttpSession) context.getExternalContext().getSession(false);
      filename = session.getServletContext().getRealPath("/WEB-INF") + File.separator + "classes" + File.separator + "goobi_opacUmlaut.txt";
    } else {
      filename = ConfigMain.getParameter("KonfigurationVerzeichnis") + "goobi_opacUmlaut.txt";
    }
    /* Datei zeilenweise durchlaufen und die Sprache vergleichen */
    try {
      FileInputStream fis = new FileInputStream(filename);
      InputStreamReader isr = new InputStreamReader(fis, "UTF8");
      BufferedReader in = new BufferedReader(isr);
      String str;
      while ((str = in.readLine()) != null) {
        if (str.length() > 0) {
          temp = temp.replaceAll(str.split(" ")[0], str.split(" ")[1]);
        }
      }
      in.close();
    } catch (IOException e) {
      myLogger.error("IOException bei Umlautkonvertierung", e);
    }
    return temp;
  }

}
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