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/*
* _____________________________________________________________________________
*
* INAF - OATS National Institute for Astrophysics - Astronomical Observatory of
* Trieste INAF - IA2 Italian Center for Astronomical Archives
* _____________________________________________________________________________
*
* Copyright (C) 2016 Istituto Nazionale di Astrofisica
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License Version 3 as published by the
* Free Software Foundation.
*
* 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.
*/
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package it.inaf.ia2.tsm.webapp;
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import ari.ucidy.UCD;
import ari.ucidy.UCDParser;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
/**
* Collection of static methods for accessing to the UCD REST service and
* validating custom UCD.
*
* @author Sonia Zorba {@literal <zorba at oats.inaf.it>}
*/
public class SearchUCD {
private static final String UCD_SERVICE_URL;
private static final String UCD_NOT_FOUND = "**** Could not find UCD ****";
static {
try {
Properties prop = new Properties();
try (InputStream in = SearchUCD.class.getClassLoader().getResourceAsStream("webapp.properties")) {
prop.load(in);
}
UCD_SERVICE_URL = prop.getProperty("ucd_service_url");
} catch (IOException e) {
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throw new ExceptionInInitializerError("Unable to load UCD service URL from webapp.properties configuration!");
}
}
private static String encodeText(String searchText) throws UCDServiceException {
try {
return URLEncoder.encode(searchText, "UTF-8").replace("+", "%20");
} catch (UnsupportedEncodingException e) {
throw new UCDServiceException("Error while encoding input text");
}
}
public static String assign(String searchText) throws UCDServiceException {
searchText = encodeText(searchText);
String urlStr = UCD_SERVICE_URL + "assign?value=" + searchText;
try {
URL urlAssign = new URL(urlStr);
HttpURLConnection connectionAssign = (HttpURLConnection) urlAssign.openConnection();
int responseCodeAssign = connectionAssign.getResponseCode();
if (responseCodeAssign == 200) {
BufferedReader br;
String line, response = "";
br = new BufferedReader(new InputStreamReader(connectionAssign.getInputStream()));
while ((line = br.readLine()) != null) {
response += line;
}
if (response.equals(UCD_NOT_FOUND)) {
return null;
}
return response;
}
throw new UCDServiceException("Server responded with a status of " + responseCodeAssign);
} catch (MalformedURLException e) {
throw new UCDServiceException("Malformed url: " + urlStr);
} catch (IOException e) {
throw new UCDServiceException("Error while reading server response");
}
}
public static List<UCDInfo> suggest(String searchText) throws UCDServiceException {
searchText = encodeText(searchText);
String urlStr = UCD_SERVICE_URL + "suggest?value=" + searchText;
try {
URL urlSuggest = new URL(urlStr);
HttpURLConnection connectionSuggest = (HttpURLConnection) urlSuggest.openConnection();
int responseCodeSuggest = connectionSuggest.getResponseCode();
if (responseCodeSuggest == 200) {
List<UCDInfo> resultList = new ArrayList<>();
BufferedReader br = new BufferedReader(new InputStreamReader(connectionSuggest.getInputStream()));
String line;
while ((line = br.readLine()) != null) {
String[] split1 = line.split("\\|");
if (split1.length == 2) {
String score = split1[0].trim();
String[] split2 = split1[1].trim().split(" ");
if (split2.length == 2) {
String flag = split2[0];
String word = split2[1];
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String definition;
// If UCD description is already inside Ucidy library
// it is possibile to avoid calling the web service.
UCD ucd = UCDParser.parseUCD(word);
if (ucd.size() == 1) {
definition = ucd.getWord(0).description;
} else {
definition = getDefinition(word);
}
resultList.add(new UCDInfo(score, flag, word, definition));
}
}
}
return resultList;
} else if (responseCodeSuggest == 204) {
return null;
}
throw new UCDServiceException("Server responded with a status of " + responseCodeSuggest);
} catch (MalformedURLException e) {
throw new UCDServiceException("Malformed url: " + urlStr);
} catch (IOException e) {
throw new UCDServiceException("Error while reading server response");
}
}
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public static String getDefinition(String word) throws UCDServiceException {
String searchText = encodeText(word);
String urlStr = UCD_SERVICE_URL + "explain?value=" + searchText;
try {
URL url = new URL(urlStr);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
int responseCode = connection.getResponseCode();
if (responseCode == 200) {
BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line, response = "";
while ((line = br.readLine()) != null) {
response += line;
}
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return response;
} else {
throw new UCDServiceException("Server responded with a status of " + responseCode);
}
} catch (MalformedURLException e) {
throw new UCDServiceException("Malformed url: " + urlStr);
} catch (IOException e) {
throw new UCDServiceException("Error while reading server response");
}
}
}