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1
53
54
106
107 package com.Yasna.forum.filter;
108
109 import java.util.*;
110
111 import com.Yasna.forum.*;
112
113
116 public class FilterProfanity extends ForumMessageFilter {
117
118
121 private String  [] filterList;
122
123
126 private boolean ignoreCase = true;
127
128
131 private Properties props;
132
133
136 private Properties propDescriptions;
137
138
143 public FilterProfanity() {
144 super();
145 this.props = new Properties();
146 this.propDescriptions = new Properties();
147 initializeProperties();
148 }
149
150
158 public FilterProfanity(ForumMessage message, Properties props,
159 Properties propDescriptions, String [] filterList, boolean ignoreCase)
160 {
161 super(message);
162 this.props = new Properties(props);
163 this.propDescriptions = new Properties(propDescriptions);
164 this.filterList = filterList;
165 this.ignoreCase = ignoreCase;
166 }
167
168
174 public ForumMessageFilter clone(ForumMessage message){
175 return new FilterProfanity(message, props, propDescriptions,
176 filterList, ignoreCase);
177 }
178
179
182 public String getName() {
183 return "Profanity Filter";
184 }
185
186
189 public String getDescription() {
190 return "Removes profanity from messages using a custom word list.";
191 }
192
193
196 public String getAuthor() {
197 return "CoolServlets.com";
198 }
199
200
203 public int getMajorVersion() {
204 return 1;
205 }
206
207
210 public int getMinorVersion() {
211 return 0;
212 }
213
214
220 public String getFilterProperty(String name) {
221 return props.getProperty(name);
222 }
223
224
230 public String getFilterPropertyDescription(String name) {
231 return propDescriptions.getProperty(name);
232 }
233
234
237 public Enumeration filterPropertyNames() {
238 return props.propertyNames();
239 }
240
241
251 public void setFilterProperty(String name, String value)
252 throws IllegalArgumentException
253 {
254 if (props.getProperty(name) == null) {
255 throw new IllegalArgumentException ();
256 }
257 props.put(name, value);
258 applyProperties();
259 }
260
261
265 public String getSubject() {
266 return filterProfanity(message.getSubject());
267 }
268
269
273 public String getBody() {
274 return filterProfanity(message.getBody());
275 }
276
277
280 private void initializeProperties() {
281 filterList = new String [0];
282 props.put("filterList","");
283 props.put("ignoreCase","on");
284
285 propDescriptions.put("filterList","A comma delimitted list of "
286 + "the bad words to filter out.");
287 propDescriptions.put("ignoreCase","Indicates whether the case "
288 + "of words should be ignored or not. For example, when on, the "
289 + "words 'CRap' and 'crap' would both be filterd if an entry of "
290 + "'CRAP' was found in the filter list.");
291 }
292
293 private void applyProperties() {
294 ignoreCase = ((String )props.getProperty("ignoreCase")).equals("on");
295 String list = (String )props.get("filterList");
296 StringTokenizer tokens = new StringTokenizer(list,",");
297 String [] newFilterList = new String [tokens.countTokens()];
298 for (int i=0; i<newFilterList.length; i++) {
299 if (ignoreCase) {
300 newFilterList[i] = tokens.nextToken().toLowerCase().trim();
301 }
302 else {
303 newFilterList[i] = tokens.nextToken().trim();
304 }
305 }
306 filterList = newFilterList;
307 }
308
309
312 private String filterProfanity(String str) {
313 if (str == null || "".equals(str)) {
315 return str;
316 }
317 String lower;
318 if (ignoreCase) {
319 lower = str.toLowerCase();
320 }
321 else {
322 lower = str;
323 }
324 for (int i=0; i<filterList.length; i++) {
325 str = replace(str, lower, filterList[i], cleanWord(filterList[i].length()));
326 }
327 return str;
328 }
329
330
334 private String cleanWord(int length) {
335 char[] newWord = new char[length];
336 for (int i=0; i<newWord.length; i++) {
337 newWord[i] = '*';
338 }
339 return new String (newWord);
340 }
341
342
345 private String replace(String line, String lowerCaseLine,
346 String oldString, String newString )
347 {
348 int i=0;
349 if ( ( i=lowerCaseLine.indexOf( oldString, i ) ) >= 0 ) {
350 int oLength = oldString.length();
351 int nLength = newString.length();
352 StringBuffer buf = new StringBuffer (line.length()+15);
353 buf.append(line.substring(0,i)).append(newString);
354 i += oLength;
355 int j = i;
356 while( ( i=lowerCaseLine.indexOf( oldString, i ) ) > 0 ) {
357 buf.append(line.substring(j,i)).append(newString);
358 i += oLength;
359 j = i;
360 }
361 buf.append(line.substring(j));
362 return buf.toString();
363 }
364 return line;
365 }
366 }
367
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