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package tim.prune.function.search;
import java.io.InputStream;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import javax.swing.JOptionPane;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import tim.prune.App;
import tim.prune.I18nManager;
/**
* Function to search Wikipedia for place names
*/
public class SearchWikipediaNames extends GenericDownloaderFunction
{
/** search term */
private String _searchTerm = null;
/** Maximum number of results to get */
private static final int MAX_RESULTS = 20;
/** Username to use for geonames queries */
private static final String GEONAMES_USERNAME = "gpsprune";
/**
* Constructor
* @param inApp App object
*/
public SearchWikipediaNames(App inApp) {
super(inApp);
}
/**
* @return name key
*/
public String getNameKey() {
return "function.searchwikipedianames";
}
/**
* @param inColNum index of column, 0 or 1
* @return key for this column
*/
protected String getColumnKey(int inColNum)
{
if (inColNum == 0) return "dialog.wikipedia.column.name";
return null;
}
/**
* Before dialog is shown, need to get search term
*/
public void begin()
{
Object search = JOptionPane.showInputDialog(_app.getFrame(),
I18nManager.getText("dialog.searchwikipedianames.search"),
getName(), JOptionPane.QUESTION_MESSAGE, null, null, "");
if (search != null)
{
_searchTerm = search.toString().toLowerCase();
if (!_searchTerm.equals("")) {
super.begin();
}
}
}
/**
* Run method to call geonames in separate thread
*/
public void run()
{
_statusLabel.setText(I18nManager.getText("confirm.running"));
// Replace awkward characters with character equivalents
final String searchTerm = encodeSearchTerm(_searchTerm);
// Firstly try the local language
String lang = I18nManager.getText("wikipedia.lang");
submitSearch(searchTerm, lang);
// If we didn't get anything, try a secondary language
if (_trackListModel.isEmpty() && _errorMessage == null && lang.equals("als")) {
submitSearch(searchTerm, "de");
}
// If still nothing then try english
if (_trackListModel.isEmpty() && _errorMessage == null && !lang.equals("en")) {
submitSearch(searchTerm, "en");
}
// Set status label according to error or "none found", leave blank if ok
if (_errorMessage == null && _trackListModel.isEmpty()) {
_errorMessage = I18nManager.getText("dialog.wikipedia.nonefound");
}
_statusLabel.setText(_errorMessage == null ? "" : _errorMessage);
finishedSearch();
}
/**
* Submit the given search to the server
* @param inSearchTerm search term
* @param inLang language code such as en, de
*/
private void submitSearch(String inSearchTerm, String inLang)
{
String urlString = "http://api.geonames.org/wikipediaSearch?title=" + inSearchTerm
+ "&maxRows=" + MAX_RESULTS + "&lang=" + inLang + "&username=" + GEONAMES_USERNAME;
// Parse the returned XML with a special handler
GetWikipediaXmlHandler xmlHandler = new GetWikipediaXmlHandler();
InputStream inStream = null;
try
{
URL url = new URL(urlString);
SAXParser saxParser = SAXParserFactory.newInstance().newSAXParser();
inStream = url.openStream();
saxParser.parse(inStream, xmlHandler);
}
catch (Exception e) {
_errorMessage = e.getClass().getName() + " - " + e.getMessage();
}
// Close stream and ignore errors
if (inStream != null)
{
try {
inStream.close();
} catch (Exception e) {}
}
// Add track list to model
ArrayList<SearchResult> trackList = xmlHandler.getTrackList();
// TODO: Do a better job of sorting replies by relevance - use three different lists
_trackListModel.addTracks(trackList);
}
/**
* Replace tricky characters in the search term and encode the others
* @param inSearchTerm entered search term
* @return modified search term to give to geonames
*/
static String encodeSearchTerm(String inSearchTerm)
{
String searchTerm = (inSearchTerm == null ? "" : inSearchTerm.trim());
if (searchTerm.isEmpty()) {
return "";
}
// Replace umlauts oe, ue, ae, OE, UE, AE, szlig
StringBuilder sb = new StringBuilder();
final int numChars = searchTerm.length();
for (int i=0; i<numChars; i++)
{
char c = searchTerm.charAt(i);
switch (c)
{
// German umlauted vowels, add an "e"
case '\u00fc' : sb.append("ue"); break;
case '\u00e4' : sb.append("ae"); break;
case '\u00f6' : sb.append("oe"); break;
// German doppel s
case '\u00df' : sb.append("ss"); break;
// accented vowels
case '\u00e8' : case '\u00e9' :
case '\u00ea' : case '\u00eb' : sb.append('e'); break;
case '\u00e0' : case '\u00e1' :
case '\u00e2' : sb.append('a'); break;
case '\u00f2' : case '\u00f3' :
case '\u00f4' : sb.append('o'); break;
case '\u00ec' : case '\u00ed' :
case '\u00ee' : case '\u00ef' : sb.append('i'); break;
// cedillas, ny, l bar
case '\u00e7' : sb.append('c'); break;
case '\u015f' : sb.append('s'); break;
case '\u00f1' : sb.append('n'); break;
case '\u0142' : sb.append('l'); break;
// everything else
default : sb.append(c);
}
}
return URLEncoder.encode(sb.toString(), StandardCharsets.UTF_8);
}
}
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