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1
25 package org.jresearch.gossip.util;
26
27 import java.text.MessageFormat  ;
28 import java.util.ArrayList ;
29 import java.util.Enumeration ;
30 import java.util.HashMap ;
31 import java.util.Iterator ;
32 import java.util.List ;
33 import java.util.Map ;
34 import java.util.ResourceBundle ;
35
36 import org.apache.oro.text.PatternCacheLRU;
37 import org.apache.oro.text.perl.Perl5Util;
38 import org.apache.struts.util.MessageResources;
39 import org.jresearch.gossip.IConst;
40 import org.jresearch.gossip.configuration.Configurator;
41 import org.jresearch.gossip.exception.ConfiguratorException;
42 import org.tiling.memo.LruCacheFactory;
43
44
49 public class MessageProcessor {
50
51 private static MessageProcessor ourInstance;
52
53 private PatternCacheLRU cache = new PatternCacheLRU(50);
54
55 private Map resultCache = new LruCacheFactory(1000).createCache();
56
57 private static HashMap emoticonsMap;
58
59 private static final String EMOTICON_IMG_TAG = "<img SRC=\"{0}images/emoticons/{1}.gif\" alt=\"{2}\" title=\"{2}\">";
60
61 private static final String TAG_NOSMILE_NAME = "NOSMILE";
62
63 private static final String TAG_NOSMILE = "[" + TAG_NOSMILE_NAME + "]";
64
65 private static final String TAG_NOSMILE_END = "[/" + TAG_NOSMILE_NAME + "]";
66
67 private Perl5Util perlUtil;
68
69 private static Object lock = new Object ();
70
71
77 public synchronized static void setEmoticonsMap(ResourceBundle bundle) {
78 Enumeration keys = bundle.getKeys();
79 emoticonsMap = new HashMap ();
80
81 while (keys.hasMoreElements()) {
82 String key = (String ) keys.nextElement();
83 String pattern = bundle.getString(key);
84
85 emoticonsMap.put(key, HtmlCodec.encode(pattern));
86 }
87 }
88
89
94 public static HashMap getEmoticonsMap() {
95 return emoticonsMap;
96 }
97
98
103 public static MessageProcessor getInstance() {
104 if (ourInstance == null) {
105 synchronized (lock) {
106 if (ourInstance == null) {
107 ourInstance = new MessageProcessor();
108 }
109 }
110 }
111
112 return ourInstance;
113 }
114
115 private MessageProcessor() {
116 perlUtil = new Perl5Util(cache);
117 }
118
119
131 public String prepareMessage(String result, int cutToLength,
132 MessageResources messages) {
133 String key = Integer.toString(result.hashCode()) + cutToLength;
134 Object value = resultCache.get(key);
135
136 if ((value == null) && !resultCache.containsKey(key)) {
137 value = prepare(result, cutToLength, messages);
138 resultCache.put(key, value);
139 }
140
141 return (String ) value;
142 }
143
144
148 public String cleanup(String result) {
149 return perlUtil.substitute("s/\\[(.*?)\\]/\r/gsi", result);
150 }
151
152 private String prepare(String result, int cutToLength,
153 MessageResources messages) {
154
155 if (cutToLength > 0) {
156 result = cleanup(result);
157
158 if (result.length() > cutToLength) {
159 result = result.substring(0, cutToLength);
160 result += "...";
161 }
162 } else {
163 result = perlUtil.substitute(
165 "s/\\[b\\](.*?)\\[\\/b\\]/<strong>$1<\\/strong>/gsi",
166 result);
167 result = perlUtil.substitute(
168 "s/\\[i\\](.*?)\\[\\/i\\]/<em>$1<\\/em>/gsi", result);
169 result = perlUtil
170 .substitute(
171 "s/\\[url\\](http[s]?:\\/\\/){1}(.*?)\\[\\/url\\]/<A HREF=\"$1$2\" TARGET=\"_blank\">$2<\\/A>/gsi",
172 result);
173 result = perlUtil
174 .substitute(
175 "s/\\[url=(http[s]?:\\/\\/){1}(.*?)\\](.*?)\\[\\/url\\]/<A HREF=\"$1$2\" TARGET=\"_blank\">$3<\\/A>/gsi",
176 result);
177 result = perlUtil
178 .substitute(
179 "s/\\[img\\](http[s]?:\\/\\/){1}(.*?)\\[\\/img\\]/<IMG SRC=\"$1$2\" BORDER=0>/gsi",
180 result);
181 result = perlUtil.substitute(
182 "s/\\[HR\\]/<hr size=\"1\" width=\"90%\" noshade>/gsi",
183 result);
184 result = perlUtil.substitute("s/\\[QUOTE\\]/<blockquote>/gsi",
185 result);
186 result = perlUtil.substitute(
187 "s/\\[\\/QUOTE\\]/<\\/blockquote>/gsi", result);
188 result = perlUtil.substitute(
189 "s/\\[code\\](.*?)\\[\\/code\\]/<code>$1<\\/code>/gsi",
190 result);
191 result = nl2br(result);
192 }
193
194 return result;
195 }
196
197
205 public String nl2br(String result) {
206 return perlUtil.substitute("s/\\n/<br>/g", result);
207 }
208
209
222
223 public String processEmoticons(String result, MessageResources messages)
224 throws ConfiguratorException {
225 result = perlUtil.substitute("s/" + TAG_NOSMILE_NAME + "\\]/"
227 + TAG_NOSMILE_NAME + "\\]/gsi", result);
228
229 List tokens = splitOnNoSmileTag(result);
230 StringBuffer res = new StringBuffer ();
231 for (int i = 0; i < tokens.size(); i++) {
232 MPToken token = (MPToken) tokens.get(i);
233 if (token.processSmiles) {
234 res.append(replaceEmoticons(token.text, messages));
235 } else {
236 res.append(token.text);
237 }
238 }
239 return res.toString();
240 }
241
242 private String replaceEmoticons(String result, MessageResources messages)
243 throws ConfiguratorException {
244 Iterator it = emoticonsMap.keySet().iterator();
245 Object [] args = {
246 Configurator.getInstance().get(IConst.CONFIG.WEB_ROOT), "", "" };
247
250 while (it.hasNext()) {
251 String key = (String ) it.next();
252 String pattern = (String ) emoticonsMap.get(key);
253 args[1] = key;
254 args[2] = messages.getMessage(Configurator.getInstance().getLocale(
255 IConst.CONFIG.DEFAULT_LOCALE), key);
256 result = replace(result, pattern, MessageFormat.format(
257 EMOTICON_IMG_TAG, args));
258 }
259
260 return result;
261 }
262
263 private List splitOnNoSmileTag(String result) {
264 ArrayList tokens = new ArrayList ();
265 StringBuffer sb = new StringBuffer (result);
266 int ind1 = 0;
267 int ind2 = 0;
268 int length = sb.length();
269 while (ind1 < length && ind2 < length) {
270 ind2 = sb.indexOf(TAG_NOSMILE, ind1);
271 if (ind2 == -1) {
272 ind2 = length;
273 }
274 tokens.add(new MPToken(true, sb.substring(ind1, ind2)));
275 if (ind2 != length) {
276 ind1 = ind2 + TAG_NOSMILE.length();
277 ind2 = sb.indexOf(TAG_NOSMILE_END, ind1);
278 if (ind2 == -1) {
279 ind2 = length;
280 }
281 tokens.add(new MPToken(false, sb.substring(ind1, ind2)));
282 if (ind2 != length) {
283 ind1 = ind2 + TAG_NOSMILE_END.length();
284 }
285 }
286 }
287 return tokens;
288 }
289
290 private class MPToken {
291
292
296 protected MPToken(boolean processSmiles, String text) {
297 super();
298 this.processSmiles = processSmiles;
299 this.text = text;
300 }
301
302 boolean processSmiles;
303
304 String text;
305 }
306
307
322 public String replace(String result, String pattern, String replace) {
323 if (result == null) {
324 throw new IllegalArgumentException ("result parameter, value = "
325 + result);
326 }
327
328 if (replace == null) {
329 throw new IllegalArgumentException ("replace parameter, value = "
330 + replace);
331 }
332
333 if ((pattern == null) || "".equals(pattern)) {
334 throw new IllegalArgumentException ("pattern parameter, value = "
335 + pattern);
336 }
337
338 if ("".equals(result)) {
339 return result;
340 }
341
342 int s = 0;
343 int e = 0;
344 StringBuffer sb = new StringBuffer (result);
345
346 while ((e = sb.indexOf(pattern, s)) > -1) {
347 sb.replace(e, e + pattern.length(), replace);
348 s = e + replace.length();
349 }
350
351 return sb.toString();
352 }
353 } |
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