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package bjc.utils.ioutils;
import java.util.HashMap;
import java.util.IllegalFormatConversionException;
import java.util.Map;
import java.util.UnknownFormatConversionException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import bjc.utils.PropertyDB;
import bjc.utils.esodata.Tape;
import bjc.utils.esodata.SingleTape;
import static bjc.utils.PropertyDB.applyFormat;
import static bjc.utils.PropertyDB.getCompiledRegex;
import static bjc.utils.PropertyDB.getRegex;
public class CLFormatter {
@FunctionalInterface
public interface Directive {
/*
* @TODO fill in parameters
*/
public void format();
}
private static final String prefixParam = getRegex("clFormatPrefix");
private static final Pattern pPrefixParam = Pattern.compile(prefixParam);
private static final String formatMod = getRegex("clFormatModifier");
private static final String prefixList = applyFormat("delimSeparatedList", prefixParam, ",");
private static final String formatDirective = applyFormat("clFormatDirective", prefixList, formatMod);
private static final Pattern pFormatDirective = Pattern.compile(formatDirective);
private Map<String, Directive> extraDirectives;
public CLFormatter() {
extraDirectives = new HashMap<>();
}
public String formatString(String format, Object... params) {
StringBuffer sb = new StringBuffer();
Matcher dirMatcher = pFormatDirective.matcher(format);
/*
* Put the parameters where we can easily handle them.
*/
Tape<Object> tParams = new SingleTape(params);
while(dirMatcher.find()) {
dirMatcher.appendReplacement(sb, "");
String dirName = dirMatcher.group("name");
String dirMods = dirMatcher.group("modifiers");
String dirParams = dirMatcher.group("params");
CLParameters arrParams = CLParameters.fromDirective(dirParams.split("(?<!'),"), tParams);
boolean atMod = false;
boolean colonMod = false;
if(dirMods != null) {
atMod = dirMods.contains("@");
colonMod = dirMods.contains(":");
}
switch(dirName) {
case "C":
handleCDirective(sb, tParams.item(), atMod, colonMod);
tParams.right();
break;
case "&":
handleFreshlineDirective(sb, arrParams);
break;
case "%":
handleLiteralDirective(sb, arrParams, "\n", '%');
break;
case "|":
handleLiteralDirective(sb, arrParams, "\f", '|');
break;
case "~":
handleLiteralDirective(sb, arrParams, "~", '~');
break;
case "R":
handleRadixDirective(sb, atMod, colonMod, arrParams, tParams.item());
tParams.right();
break;
default:
String msg = String.format("Unknown format directive '%s'", dirName);
throw new UnknownFormatConversionException(msg);
}
}
dirMatcher.appendTail(sb);
return sb.toString();
}
private void handleCDirective(StringBuffer buff, Object parm, boolean atMod, boolean colonMod) {
if(!(parm instanceof Character)) {
throw new IllegalFormatConversionException('C', parm.getClass());
}
char ch = (Character) parm;
int codepoint = (int) ch;
if(colonMod) {
/*
* Colon mod means print Unicode character name.
*/
buff.append(Character.getName(codepoint));
} else {
buff.append(ch);
}
}
private void handleFreshlineDirective(StringBuffer buff, CLParameters params) {
int nTimes = 1;
if(params.length() > 1) {
nTimes = params.getInt(0, "occurance count", '&');
}
if(buff.charAt(buff.length() - 1) == '\n') nTimes -= 1;
for(int i = 0; i < nTimes; i++) {
buff.append("\n");
}
}
private void handleLiteralDirective(StringBuffer buff, CLParameters params, String lit, char directive) {
int nTimes = 1;
if(params.length() > 1) {
nTimes = params.getInt(0, "occurance count", directive);
}
for(int i = 0; i < nTimes; i++) {
buff.append(lit);
}
}
private void handleRadixDirective(StringBuffer buff, boolean atMod, boolean colonMod, CLParameters params, Object arg) {
if(!(arg instanceof Number)) {
throw new IllegalFormatConversionException('R', arg.getClass());
}
/*
* @TODO see if this is the way we want to do this.
*/
long val = ((Number)arg).longValue();
if(params.length() == 0) {
if(atMod) {
buff.append(NumberUtils.toRoman((Long)val, colonMod));
} else if(colonMod) {
buff.append(NumberUtils.toOrdinal(val));
} else {
buff.append(NumberUtils.toCardinal(val));
}
} else {
if(params.length() < 1)
throw new IllegalArgumentException("R directive requires at least one parameter, the radix");
int radix = params.getInt(0, "radix", 'R');
/*
* Initialize the two padding related parameters, and
* then fill them in from the directive parameters if
* they are present.
*/
int mincol = 0;
char padchar = ' ';
if(params.length() > 2) {
mincol = params.getIntDefault(1, "minimum column count", 'R', 0);
}
if(params.length() > 3) {
padchar = params.getCharDefault(2, "padding character", 'R', ' ');
}
if(colonMod) {
/*
* We're doing commas, so check if the two
* comma-related parameters were supplied.
*/
int commaInterval = 0;
char commaChar = ',';
if(params.length() > 3) {
commaChar = params.getCharDefault(3, "comma character", 'R', ' ');
}
if(params.length() > 4) {
commaInterval = params.getIntDefault(4, "comma interval", 'R', 0);
}
NumberUtils.toCommaString(val, mincol, padchar, commaInterval, commaChar, atMod, radix);
} else {
NumberUtils.toNormalString(val, mincol, padchar, atMod, radix);
}
}
}
}
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