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1
13 package info.magnolia.cms.taglibs.util;
14
15 import info.magnolia.cms.core.Content;
16 import info.magnolia.cms.core.ItemType;
17 import info.magnolia.cms.core.NodeData;
18
19 import java.io.IOException  ;
20 import java.util.ArrayList ;
21 import java.util.Collection ;
22 import java.util.Iterator ;
23
24 import javax.jcr.PropertyType;
25 import javax.servlet.jsp.JspException ;
26 import javax.servlet.jsp.JspWriter ;
27 import javax.servlet.jsp.tagext.TagSupport ;
28
29 import org.apache.commons.lang.ArrayUtils;
30 import org.apache.commons.lang.StringUtils;
31 import org.apache.commons.lang.exception.NestableRuntimeException;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
34
35
36
40 public class SearchResultSnippetTag extends TagSupport {
41
42
45 private static final long serialVersionUID = 222L;
46
47
50 private static Logger log = LoggerFactory.getLogger(SearchResultSnippetTag.class);
51
52
55 private Content page;
56
57
60 private String query;
61
62
65 private int chars = 100;
66
67
70 private int maxSnippets = 3;
71
72
76 public void setQuery(String query) {
77 this.query = query;
78 }
79
80
84 public void setChars(int chars) {
85 this.chars = chars;
86 }
87
88
92 public void setMaxSnippets(int maxSnippets) {
93 this.maxSnippets = maxSnippets;
94 }
95
96
100 public void setPage(Content page) {
101 this.page = page;
102 }
103
104
107 public int doStartTag() throws JspException {
108
109 JspWriter out = this.pageContext.getOut();
110 try {
111 Iterator iterator = getSnippets().iterator();
112 while (iterator.hasNext()) {
113 out.println(iterator.next());
114 }
115 }
116 catch (IOException e) {
117 throw new NestableRuntimeException(e);
119 }
120 return EVAL_PAGE;
121 }
122
123
132 public Collection getSnippets() {
133
134 log.debug("collecting snippets");
136 Collection snippets = new ArrayList ();
137 String [] searchTerms = StringUtils.split(this.query);
138
139 Collection paragraphCollections = this.page.getChildren(ItemType.CONTENTNODE);
140
141 Iterator iterator = paragraphCollections.iterator();
142 outer : while (iterator.hasNext()) {
143 Content paragraphCollection = (Content) iterator.next();
144
145 Collection paragraphs = paragraphCollection.getChildren();
146
147 Iterator parIterator = paragraphs.iterator();
148 while (parIterator.hasNext()) {
149 Content paragraph = (Content) parIterator.next();
150
151 log.debug("Iterating on paragraph {}", paragraph);
153 Collection properties = paragraph.getNodeDataCollection();
154
155 Iterator dataIterator = properties.iterator();
156 while (dataIterator.hasNext()) {
157 NodeData property = (NodeData) dataIterator.next();
158 if (property.getType() != PropertyType.BINARY) {
159
160 String resultString = property.getString();
161
162 log.debug("Iterating on property {}", property.getName()); log.debug("Property value is {}", resultString);
165 if (resultString.length() < 20) {
168 continue;
169 }
170
171 for (int j = 0; j < searchTerms.length; j++) {
172 String searchTerm = StringUtils.lowerCase(searchTerms[j]);
173
174 if (!ArrayUtils.contains(SimpleSearchTag.KEYWORDS, searchTerm) && searchTerm.length() > 2) {
176
177 log.debug("Looking for search term [{}] in [{}]", searchTerm, resultString);
179 if (!StringUtils.contains(resultString.toLowerCase(), searchTerm)) {
182 continue;
183 }
184
185 resultString = stripHtmlTags(resultString);
187
188 int pos = resultString.toLowerCase().indexOf(searchTerm);
190 if (pos > -1) {
191
192 int posEnd = pos + searchTerm.length();
193 int from = (pos - chars / 2);
194 if (from < 0) {
195 from = 0;
196 }
197
198 int to = from + chars;
199 if (to > resultString.length()) {
200 to = resultString.length();
201 }
202
203 StringBuffer snippet = new StringBuffer ();
204
205 snippet.append(StringUtils.substring(resultString, from, pos));
206 snippet.append("<strong>"); snippet.append(StringUtils.substring(resultString, pos, posEnd));
208 snippet.append("</strong>"); snippet.append(StringUtils.substring(resultString, posEnd, to));
210
211 if (from > 0) {
212 snippet.insert(0, "... "); }
214 if (to < resultString.length()) {
215 snippet.append("... "); }
217
218 log.debug("Search term found, adding snippet {}", snippet);
220 snippets.add(snippet);
221 if (snippets.size() >= this.maxSnippets) {
222
223 log.debug("Maximum number of snippets ({}) reached, exiting", Integer.toString(this.maxSnippets));
225
226 break outer;
227 }
228 }
229 }
230 }
231 }
232 }
233 }
234 }
235
236 return snippets;
237 }
238
239
243 protected String stripHtmlTags(String resultString) {
244 return resultString.replaceAll("\\<(.*?\\s*)*\\>", StringUtils.EMPTY); }
246
247
250 public void release() {
251 this.query = null;
252 this.page = null;
253 this.chars = 100;
254 this.maxSnippets = 3;
255 super.release();
256 }
257
258 }
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