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/*
* Mobius Software LTD
* Copyright 2019, Mobius Software LTD and individual contributors
* by the @authors tag.
*
* This program is free software: you can redistribute it and/or modify
* under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation; either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see
*/
package org.restcomm.protocols.ss7.map.primitives;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import org.restcomm.protocols.ss7.commonapp.datacoding.GSMCharset;
import org.restcomm.protocols.ss7.commonapp.datacoding.GSMCharsetDecoder;
import org.restcomm.protocols.ss7.commonapp.datacoding.GSMCharsetDecodingData;
import org.restcomm.protocols.ss7.commonapp.datacoding.GSMCharsetEncoder;
import org.restcomm.protocols.ss7.commonapp.datacoding.GSMCharsetEncodingData;
import org.restcomm.protocols.ss7.commonapp.datacoding.Gsm7EncodingStyle;
import org.restcomm.protocols.ss7.map.api.MAPException;
import org.restcomm.protocols.ss7.map.api.datacoding.CBSDataCodingGroup;
import org.restcomm.protocols.ss7.map.api.datacoding.CBSDataCodingScheme;
import org.restcomm.protocols.ss7.map.api.primitives.USSDString;
import org.restcomm.protocols.ss7.map.datacoding.CBSDataCodingSchemeImpl;
import com.mobius.software.telco.protocols.ss7.asn.primitives.ASNOctetString;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
/**
*
* @author amit bhayani
* @author sergey vetyutnev
* @author yulianoifa
*
*/
public class USSDStringImpl extends ASNOctetString implements USSDString {
private CBSDataCodingScheme dataCodingScheme;
private static Charset ucs2Charset = Charset.forName("UTF-16BE");
public USSDStringImpl() {
super("USSDString",1,160,false);
}
public USSDStringImpl(ByteBuf data, CBSDataCodingScheme dataCodingScheme) {
super(data,"USSDString",1,160,false);
if (dataCodingScheme == null)
dataCodingScheme = new CBSDataCodingSchemeImpl(15);
this.dataCodingScheme = dataCodingScheme;
}
public USSDStringImpl(String ussdString, CBSDataCodingScheme dataCodingScheme, Charset gsm8Charset) throws MAPException {
super(translate(ussdString, dataCodingScheme, gsm8Charset),"USSDString",1,160,false);
if (dataCodingScheme == null) {
dataCodingScheme = new CBSDataCodingSchemeImpl(15);
}
this.dataCodingScheme = dataCodingScheme;
}
public static ByteBuf translate(String ussdString, CBSDataCodingScheme dataCodingScheme, Charset gsm8Charset) throws MAPException {
if (ussdString == null) {
ussdString = "";
}
if (dataCodingScheme == null) {
dataCodingScheme = new CBSDataCodingSchemeImpl(15);
}
if (dataCodingScheme.getIsCompressed()) {
// TODO: implement the case with compressed message
throw new MAPException("Error encoding a text in USSDStringImpl: compressed message is not supported yet");
} else {
switch (dataCodingScheme.getCharacterSet()) {
case GSM7:
GSMCharset cSet = GSMCharset.gsm7CharsetDefault;
if(dataCodingScheme.getNationalLanguageShiftTable()!=null)
{
switch(dataCodingScheme.getNationalLanguageShiftTable())
{
case Arabic:
cSet=GSMCharset.gsm7CharsetUrdu;
break;
case Turkish:
cSet=GSMCharset.gsm7CharsetTurkish;
break;
case Portuguese:
cSet=GSMCharset.gsm7CharsetPortugese;
break;
case Spanish:
cSet=GSMCharset.gsm7CharsetSpanish;
break;
default:
break;
}
}
GSMCharsetEncoder encoder = (GSMCharsetEncoder) cSet.newEncoder();
encoder.setGSMCharsetEncodingData(new GSMCharsetEncodingData(Gsm7EncodingStyle.bit7_ussd_style, null));
ByteBuf bb = null;
try {
bb = encoder.encode(ussdString);
} catch (Exception e) {
// This can not occur
}
return bb;
case GSM8:
if (gsm8Charset != null) {
return Unpooled.wrappedBuffer(ussdString.getBytes(gsm8Charset));
} else {
throw new MAPException(
"Error encoding a text in USSDStringImpl: gsm8Charset is not defined for GSM8 dataCodingScheme");
}
case UCS2:
if (dataCodingScheme.getDataCodingGroup() == CBSDataCodingGroup.GeneralWithLanguageIndication) {
if (ussdString.length() < 1)
ussdString = ussdString + " ";
if (ussdString.length() < 2)
ussdString = ussdString + " ";
if (ussdString.length() < 3)
ussdString = ussdString + "\n";
cSet = GSMCharset.gsm7CharsetDefault;
encoder = (GSMCharsetEncoder) cSet.newEncoder();
encoder.setGSMCharsetEncodingData(new GSMCharsetEncodingData(Gsm7EncodingStyle.bit7_ussd_style, null));
bb = null;
try {
String sb = ussdString.substring(0, 3);
bb = encoder.encode(sb);
} catch (Exception e) {
// This can not occur
}
ByteBuf buf1=null;
if (bb != null) {
buf1=Unpooled.wrappedBuffer(bb);
buf1.resetReaderIndex();
}
String sb2 = ussdString.substring(3);
ByteBuf buf2=Unpooled.wrappedBuffer(sb2.getBytes(ucs2Charset));
buf2.resetReaderIndex();
if(buf1==null)
return buf2;
else
return Unpooled.wrappedBuffer(buf1,buf2);
} else {
return Unpooled.wrappedBuffer(ussdString.getBytes(ucs2Charset));
}
default:
break;
}
}
return null;
}
public void setDataCoding(CBSDataCodingSchemeImpl dataCodingScheme) {
this.dataCodingScheme=dataCodingScheme;
}
public String getString(Charset gsm8Charset) throws MAPException {
String res = "";
if (dataCodingScheme == null) {
dataCodingScheme = new CBSDataCodingSchemeImpl(15);
}
ByteBuf value=getValue();
if (value == null) {
throw new MAPException("Error decoding a text in USSDStringImpl: encoded data can not be null");
}
if (dataCodingScheme.getIsCompressed()) {
// TODO: implement the case with compressed sms message
throw new MAPException("Error decoding a text in USSDStringImpl: compressed message is not supported yet");
} else {
switch (dataCodingScheme.getCharacterSet()) {
case GSM7:
GSMCharset cSet = GSMCharset.gsm7CharsetDefault;
if(dataCodingScheme.getNationalLanguageShiftTable()!=null)
{
switch(dataCodingScheme.getNationalLanguageShiftTable())
{
case Arabic:
cSet=GSMCharset.gsm7CharsetUrdu;
break;
case Turkish:
cSet=GSMCharset.gsm7CharsetTurkish;
break;
case Portuguese:
cSet=GSMCharset.gsm7CharsetPortugese;
break;
case Spanish:
cSet=GSMCharset.gsm7CharsetSpanish;
break;
default:
break;
}
}
GSMCharsetDecoder decoder = (GSMCharsetDecoder) cSet.newDecoder();
decoder.setGSMCharsetDecodingData(new GSMCharsetDecodingData(Gsm7EncodingStyle.bit7_ussd_style, Integer.MAX_VALUE, 0));
String bf = null;
try {
bf = decoder.decode(value);
} catch (CharacterCodingException e) {
// This can not occur
}
if (bf != null)
res = bf;
break;
case GSM8:
if (gsm8Charset != null)
res = value.toString(gsm8Charset);
break;
case UCS2:
String pref = "";
if (dataCodingScheme.getDataCodingGroup() == CBSDataCodingGroup.GeneralWithLanguageIndication) {
cSet = GSMCharset.gsm7CharsetDefault;
decoder = (GSMCharsetDecoder) cSet.newDecoder();
decoder.setGSMCharsetDecodingData(new GSMCharsetDecodingData(Gsm7EncodingStyle.bit7_ussd_style, Integer.MAX_VALUE, 0));
ByteBuf buf2;
if (value.readableBytes() < 3)
buf2 = value;
else
buf2 = value.readSlice(3);
bf = null;
try {
bf = decoder.decode(buf2);
} catch (CharacterCodingException e) {
// This can not occur
}
if (bf != null)
pref = bf;
res = pref + value.toString(ucs2Charset);
} else {
res = value.toString(ucs2Charset);
}
break;
default:
break;
}
}
return res;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("USSD String");
sb.append(" [");
try {
String s1 = this.getString(null);
sb.append(s1);
} catch (MAPException e) {
}
if (this.dataCodingScheme != null) {
sb.append(", dcs=");
sb.append(dataCodingScheme);
}
sb.append("]");
return sb.toString();
}
}
