added a 'inlink' search option according to the suggestion in the YaCy

forum at 
http://forum.yacy-websuche.de/viewtopic.php?f=18&t=4572#p27410

The feature was not called 'haslink' but called 'inlink' to have a
analogous naming like 'inurl'. This causes now that you can search for
words in links of the document, like:
* inlink:yacy
searches all documents which link to pages which have an 'yacy' in the
url.

htroot/index.html

@@ -126,6 +126,8 @@
         <dl style="width:500px">
           <dt>inurl:&lt;phrase&gt;</dt>
           <dd>only urls with the &lt;phrase&gt; in the url</dd>
+          <dt>inlink:&lt;phrase&gt;</dt>
+          <dd>only urls with the &lt;phrase&gt; within outbound links of the document</dd>
           <dt>filetype:&lt;ext&gt;</dt>
           <dd>only urls with extension &lt;ext&gt;</dd>
           <dt>site:&lt;host&gt;</dt>

htroot/yacy/search.java

@@ -228,7 +228,7 @@ public final class search {
                     null, // no snippet computation
                     count,
                     0,
-                    filter, null, null, null,
+                    filter, null, null, null, null,
                     QueryParams.Searchdom.LOCAL,
                     -1,
                     null,
@@ -290,7 +290,7 @@ public final class search {
                     null, // no snippet computation
                     count,
                     0,
-                    filter, null, null, null,
+                    filter, null, null, null, null,
                     QueryParams.Searchdom.LOCAL,
                     -1,
                     constraint,

htroot/yacysearch.java

@@ -349,6 +349,7 @@ public class yacysearch {
             String protocol = null;
             String tld = null;
             String ext = null;
+            String inlink = null;
 
             // check available memory and clean up if necessary
             if ( !MemoryControl.request(8000000L, false) ) {
@@ -421,13 +422,13 @@ public class yacysearch {
                 modifier.append("/language/").append(language).append(' ');
             }
 
-            final int inurl = querystring.indexOf("inurl:", 0);
-            if ( inurl >= 0 ) {
-                int ftb = querystring.indexOf(' ', inurl);
+            final int inurlp = querystring.indexOf("inurl:", 0);
+            if ( inurlp >= 0 ) {
+                int ftb = querystring.indexOf(' ', inurlp);
                 if ( ftb == -1 ) {
                     ftb = querystring.length();
                 }
-                final String urlstr = querystring.substring(inurl + 6, ftb);
+                final String urlstr = querystring.substring(inurlp + 6, ftb);
                 querystring = querystring.replace("inurl:" + urlstr, "");
                 if ( !urlstr.isEmpty() ) {
                     urlmask = urlmask == null ? ".*" + urlstr + ".*" : urlmask + urlstr + ".*";
@@ -435,6 +436,17 @@ public class yacysearch {
                 modifier.append("inurl:").append(urlstr).append(' ');
             }
 
+            final int inlinkp = querystring.indexOf("inlink:", 0);
+            if ( inlinkp >= 0 ) {
+                int ftb = querystring.indexOf(' ', inlinkp);
+                if ( ftb == -1 ) {
+                    ftb = querystring.length();
+                }
+                inlink = querystring.substring(inlinkp + 7, ftb);
+                querystring = querystring.replace("inlink:" + inlink, "");
+                modifier.append("inlink:").append(inlink).append(' ');
+            }
+
             final int filetype = querystring.indexOf("filetype:", 0);
             if ( filetype >= 0 ) {
                 int ftb = querystring.indexOf(' ', filetype);
@@ -712,7 +724,7 @@ public class yacysearch {
                     snippetFetchStrategy,
                     itemsPerPage,
                     startRecord,
-                    urlmask, protocol, tld, ext,
+                    urlmask, protocol, tld, ext, inlink,
                     clustersearch && global ? QueryParams.Searchdom.CLUSTER : (global && indexReceiveGranted
                         ? QueryParams.Searchdom.GLOBAL
                         : QueryParams.Searchdom.LOCAL),

source/net/yacy/search/query/QueryParams.java

@@ -114,7 +114,7 @@ public final class QueryParams {
     public Pattern urlMask;
 
     public final Pattern prefer;
-    public final String protocol, tld, ext;
+    public final String protocol, tld, ext, inlink;
     boolean urlMask_isCatchall;
     public final Classification.ContentDomain contentdom;
     public final String targetlang;
@@ -172,6 +172,7 @@ public final class QueryParams {
         this.protocol = null;
         this.tld = null;
         this.ext = null;
+        this.inlink = null;
         this.prefer = matchnothing_pattern;
         this.contentdom = ContentDomain.ALL;
         this.itemsPerPage = itemsPerPage;
@@ -221,7 +222,7 @@ public final class QueryParams {
         final Collection<Tagging.Metatag> metatags,
         final CacheStrategy snippetCacheStrategy,
         final int itemsPerPage, final int offset,
-        final String urlMask, final String protocol, final String tld, final String ext,
+        final String urlMask, final String protocol, final String tld, final String ext, final String inlink,
         final Searchdom domType, final int domMaxTargets,
         final Bitfield constraint, final boolean allofconstraint,
         final String nav_sitehash,
@@ -267,6 +268,7 @@ public final class QueryParams {
         this.protocol = protocol;
         this.tld = tld;
         this.ext = ext;
+        this.inlink = inlink;
         try {
             this.prefer = Pattern.compile(prefer);
         } catch (final PatternSyntaxException ex) {
@@ -477,6 +479,10 @@ public final class QueryParams {
             fq.append(" AND ").append(YaCySchema.url_file_ext_s.getSolrFieldName()).append(":\"").append(this.ext).append('\"');
         }
         
+        if (this.inlink != null) {
+            fq.append(" AND ").append(YaCySchema.outboundlinks_urlstub_txt.getSolrFieldName()).append(":\"").append(this.inlink).append('\"');
+        }
+        
         if (!this.urlMask_isCatchall) {
             // add a filter query on urls
             String urlMaskPattern = this.urlMask.pattern();
@@ -576,6 +582,10 @@ public final class QueryParams {
             context.append(this.constraint).append(asterisk);
             context.append(this.maxDistance).append(asterisk);
             context.append(this.modifier.s).append(asterisk);
+            context.append(this.protocol).append(asterisk);
+            context.append(this.tld).append(asterisk);
+            context.append(this.ext).append(asterisk);
+            context.append(this.inlink).append(asterisk);
             context.append(this.lat).append(asterisk).append(this.lon).append(asterisk).append(this.radius).append(asterisk);
             context.append(this.snippetCacheStrategy == null ? "null" : this.snippetCacheStrategy.name());
             String result = context.toString();