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/* ============================================================================ |
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* Douglas Thrift's Search Engine License |
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* |
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* Copyright (C) 2002, Douglas Thrift. All Rights Reserved. |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright notice, |
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* this list of conditions and the following disclaimer in the documentation |
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* and/or other materials provided with the distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, if any, must |
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* include the following acknowledgment: |
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* |
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* "This product includes software developed by Douglas Thrift |
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* (http://computers.douglasthrift.net/searchengine/)." |
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* |
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* Alternately, this acknowledgment may appear in the software itself, if |
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* and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Douglas Thrift" and "Douglas Thrift's Search Engine" must not |
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* be used to endorse or promote products derived from this software without |
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* specific prior written permission. For written permission, please visit |
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* http://www.douglasthrift.net/contact.cgi for contact information. |
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* |
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* 5. Products derived from this software may not be called "Douglas Thrift's |
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* Search Engine", nor may "Douglas Thrift's Search Engine" appear in their |
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* name, without prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* ============================================================================ |
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*/ |
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// Douglas Thrift's Search Engine Ranker |
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// |
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// Douglas Thrift |
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// |
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// Ranker.cpp |
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|
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#include "Ranker.h" |
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|
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Ranker::Ranker() |
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{ |
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value = 0; |
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requiredValue = 0; |
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excludedValue = 0; |
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eitherOrValue = 0; |
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allIn = all; |
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} |
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|
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Ranker::Ranker(Page& page) : Page(page) |
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{ |
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value = 0; |
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requiredValue = 0; |
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excludedValue = 0; |
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eitherOrValue = 0; |
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allIn = all; |
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} |
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|
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void Ranker::rank(vector<string> query) |
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{ |
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vector<string> prep; |
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|
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for (unsigned index = 0; index < query.size(); index++) |
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{ |
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if (query[index] == "allintitle:" && index == 0) |
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{ |
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allIn = title; |
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} |
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else if (query[index] == "allinurl:" && index == 0) |
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{ |
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allIn = url; |
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} |
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else if (query[index] == "allintext:" && index == 0) |
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{ |
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allIn = text; |
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} |
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else if (query[index].find("site:") == 0 && query[index].size() > 5) |
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{ |
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site = query[index].substr(5); |
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} |
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else if (query[index].find("intitle:") == 0 && query[index].size() > 8) |
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{ |
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prep.push_back("TITLE " + query[index].substr(8)); |
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} |
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else if (query[index].find("inurl:") == 0 && query[index].size() > 6) |
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{ |
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prep.push_back("URL " + query[index].substr(6)); |
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} |
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else if (query[index].find("intext:") == 0 && query[index].size() > 7) |
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{ |
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prep.push_back("TEXT " + query[index].substr(7)); |
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} |
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else |
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{ |
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prep.push_back(query[index]); |
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} |
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} |
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|
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if (prep.size() > 0) |
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{ |
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bool or_ = false; |
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for (unsigned index = 0; index < prep.size(); index++) |
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{ |
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bool exclude = false; |
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if (prep[index].find('+') == 0) |
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{ |
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prep[index].erase(0, 1); |
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} |
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else if (prep[index].find('-') == 0) |
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{ |
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exclude = true; |
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prep[index].erase(0, 1); |
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} |
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|
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if (or_) |
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{ |
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if (prep[index].find(" OR") == string::npos) |
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{ |
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or_ = false; |
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} |
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|
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eitherOr[eitherOr.size() - 1] += ' ' + prep[index]; |
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} |
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else if (exclude) |
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{ |
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excluded.push_back(prep[index]); |
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} |
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else if (prep[index].find(" OR") != string::npos) |
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{ |
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or_ = true; |
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eitherOr.push_back(prep[index]); |
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} |
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else |
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{ |
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required.push_back(prep[index]); |
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} |
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} |
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} |
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|
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rank(); |
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} |
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|
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void Ranker::setSample() |
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{ |
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map<unsigned, unsigned>::iterator itor; |
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|
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multimap<unsigned, map<unsigned, unsigned>::iterator> distances; |
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|
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for (itor = occurrencesText.begin(); itor != occurrencesText.end(); itor++) |
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{ |
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unsigned distance; |
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|
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if (++itor != occurrencesText.end()) |
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{ |
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unsigned next = itor->first; |
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itor--; |
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|
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distance = next - (itor->first + itor->second); |
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} |
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else |
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{ |
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distance = UINT_MAX; |
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itor--; |
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} |
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|
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distances.insert(pair<unsigned, map<unsigned, |
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unsigned>::iterator>(distance, itor)); |
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} |
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|
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if (distances.begin() != distances.end()) |
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{ |
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itor = distances.begin()->second; |
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} |
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|
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string portion; |
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unsigned sampleLength = 0, begin = 0, end = string::npos; |
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while (sampleLength < 160 && itor != occurrencesText.end()) |
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{ |
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unsigned found = itor->first; |
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unsigned length = itor->second; |
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|
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for (unsigned index = found; index > begin; index--) |
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{ |
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if (index == begin) cerr << "Oh crap, I'm insane!\n"; |
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if (found - index >= 160 - sampleLength - length) |
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{ |
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for (; index < found; index++) |
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{ |
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if (isspace(getText()[index])) break; |
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} |
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begin = index + 1; |
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break; |
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} |
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else if ((index > begin ? (isupper(getText()[index]) && |
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!isalnum(getText()[index - 1])) : isupper(getText()[index])) && |
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index != found) |
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{ |
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begin = index; |
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break; |
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} |
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} |
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|
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if (end + 1 != begin) sample += " <strong>...</strong> "; |
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|
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portion = getText().substr(begin, found - begin); |
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sampleLength += portion.length(); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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sample += portion + "<strong>"; |
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|
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portion = getText().substr(found, length); |
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sampleLength += portion.length(); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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sample += portion + "</strong>"; |
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|
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begin = found + length; |
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end = begin - 1; |
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|
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if (++itor != occurrencesText.end()) |
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{ |
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if (itor->first + itor->second < begin + 160 - sampleLength) |
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{ |
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portion = getText().substr(begin, itor->first - begin); |
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sampleLength += portion.length(); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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sample += portion; |
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|
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begin = itor->first; |
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end = begin - 1; |
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} |
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else |
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{ |
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for (end = begin + 160 - sampleLength; end > begin; end--) |
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{ |
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if (isspace(getText()[end])) break; |
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} |
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|
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portion = getText().substr(begin, end - begin + 1); |
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sampleLength += portion.length(); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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sample += portion + " <strong>...</strong>"; |
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|
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break; |
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} |
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} |
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else |
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{ |
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for (end = begin + 160 - sampleLength; end > begin && (end + 1 < |
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getText().length()); end--) |
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{ |
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if (isspace(getText()[end])) break; |
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} |
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|
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if (end >= getText().length()) end = getText().length() - 1; |
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|
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portion = getText().substr(begin, end - begin + 1); |
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sampleLength += portion.length(); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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sample += portion; |
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|
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if (end + 1 < getText().length()) |
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{ |
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sample += " <strong>...</strong>"; |
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} |
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|
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break; |
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} |
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} |
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} |
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|
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string Ranker::getTitle() |
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{ |
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string title, portion; |
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|
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unsigned begin = 0; |
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for (map<unsigned, unsigned>::iterator itor = occurrencesTitle.begin(); |
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itor != occurrencesTitle.end(); itor++) |
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{ |
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unsigned found = itor->first; |
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unsigned length = itor->second; |
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|
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portion = Page::getTitle().substr(begin, found - begin); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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title += portion + "<strong>"; |
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|
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portion = Page::getTitle().substr(found, length); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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title += portion + "</strong>"; |
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|
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begin = found + length; |
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} |
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|
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portion = Page::getTitle().substr(begin); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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title += portion; |
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|
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return title; |
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} |
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|
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string Ranker::getDescription() |
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{ |
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string description, portion; |
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|
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unsigned begin = 0; |
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for (map<unsigned, unsigned>::iterator itor = |
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occurrencesDescription.begin(); itor != occurrencesDescription.end(); |
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itor++) |
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{ |
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unsigned found = itor->first; |
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unsigned length = itor->second; |
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|
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portion = Page::getDescription().substr(begin, found - begin); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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description += portion + "<strong>"; |
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|
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portion = Page::getDescription().substr(found, length); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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description += portion + "</strong>"; |
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|
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begin = found + length; |
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} |
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|
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portion = Page::getDescription().substr(begin); |
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|
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entities(portion, '&', "&"); |
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entities(portion, '\"', """); |
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entities(portion, '<', "<"); |
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entities(portion, '>', ">"); |
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|
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description += portion; |
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|
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return description; |
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} |
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|
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bool Ranker::operator==(const unsigned number) const |
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{ |
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return value == number; |
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} |
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|
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bool Ranker::operator==(const Ranker& ranker) const |
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{ |
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return value == ranker.value; |
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} |
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|
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bool Ranker::operator!=(const unsigned number) const |
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{ |
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return value != number; |
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} |
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|
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bool Ranker::operator!=(const Ranker& ranker) const |
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{ |
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return value != ranker.value; |
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} |
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|
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bool Ranker::operator<(const unsigned number) const |
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{ |
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return value < number; |
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} |
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|
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bool Ranker::operator<(const Ranker& ranker) const |
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{ |
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return value < ranker.value; |
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} |
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|
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bool Ranker::operator>(const unsigned number) const |
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{ |
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return value > number; |
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} |
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|
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bool Ranker::operator >(const Ranker& ranker) const |
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{ |
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return value > ranker.value; |
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} |
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|
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void Ranker::rank() |
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{ |
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lowerAddress = string(getAddress().length(), ' '); |
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for (unsigned index = 0; index < lowerAddress.length(); index++) |
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{ |
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lowerAddress[index] = tolower(getAddress()[index]); |
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} |
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|
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if (site == "" || lowerAddress.rfind(site) == lowerAddress.length() - |
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site.length()) |
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{ |
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bool isRequired = required.size() > 0; |
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bool isExcluded = excluded.size() > 0; |
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bool isEitherOr = eitherOr.size() > 0; |
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|
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lowerURL = string(getURL().length(), ' '); |
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for (unsigned index = 0; index < lowerURL.length(); index++) |
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{ |
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lowerURL[index] = tolower(getURL()[index]); |
| 455 |
} |
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|
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lowerTitle = string(Page::getTitle().length(), ' '); |
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for (unsigned index0 = 0; index0 < lowerTitle.length(); index0++) |
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{ |
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lowerTitle[index0] = tolower(Page::getTitle()[index0]); |
| 461 |
} |
| 462 |
|
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lowerText = string(Page::getText().length(), ' '); |
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for (unsigned index1 = 0; index1 < lowerText.length(); index1++) |
| 465 |
{ |
| 466 |
lowerText[index1] = tolower(Page::getText()[index1]); |
| 467 |
} |
| 468 |
|
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if (isRequired) checkRequired(); |
| 470 |
if (isExcluded && (isRequired || isEitherOr)) checkExcluded(); |
| 471 |
if (isEitherOr) checkEitherOr(); |
| 472 |
|
| 473 |
if (isRequired && isExcluded && isEitherOr) |
| 474 |
{ |
| 475 |
value += requiredValue && !excludedValue && eitherOrValue ? |
| 476 |
requiredValue + eitherOrValue : 0; |
| 477 |
} |
| 478 |
else if (isRequired && isExcluded) |
| 479 |
{ |
| 480 |
value += requiredValue && !excludedValue ? requiredValue : 0; |
| 481 |
} |
| 482 |
else if (isRequired && isEitherOr) |
| 483 |
{ |
| 484 |
value += requiredValue && eitherOrValue ? requiredValue + |
| 485 |
eitherOrValue : 0; |
| 486 |
} |
| 487 |
else if (isExcluded && isEitherOr) |
| 488 |
{ |
| 489 |
value += !excludedValue && eitherOrValue ? eitherOrValue : 0; |
| 490 |
} |
| 491 |
else if (isRequired) |
| 492 |
{ |
| 493 |
value += requiredValue; |
| 494 |
} |
| 495 |
else if (isEitherOr) |
| 496 |
{ |
| 497 |
value += eitherOrValue; |
| 498 |
} |
| 499 |
else |
| 500 |
{ |
| 501 |
// do nothing this is a bad search and warrants no results |
| 502 |
} |
| 503 |
|
| 504 |
if (value > 0) |
| 505 |
{ |
| 506 |
string lowerDescription = string(Page::getDescription().length(), |
| 507 |
' '); |
| 508 |
for (unsigned index = 0; index < lowerDescription.length(); index++) |
| 509 |
{ |
| 510 |
lowerDescription[index] = tolower( |
| 511 |
Page::getDescription()[index]); |
| 512 |
} |
| 513 |
|
| 514 |
for (unsigned index0 = 0; index0 < required.size(); index0++) |
| 515 |
{ |
| 516 |
if (required[index0].find("URL ") == 0) |
| 517 |
{ |
| 518 |
string fred = required[index0].substr(4); |
| 519 |
value += find(fred, lowerDescription, |
| 520 |
occurrencesDescription); |
| 521 |
} |
| 522 |
else if (required[index0].find("TITLE ") == 0) |
| 523 |
{ |
| 524 |
string fred = required[index0].substr(6); |
| 525 |
value += find(fred, lowerDescription, |
| 526 |
occurrencesDescription); |
| 527 |
} |
| 528 |
else if (required[index0].find("TEXT ") == 0) |
| 529 |
{ |
| 530 |
string fred = required[index0].substr(5); |
| 531 |
value += find(fred, lowerDescription, |
| 532 |
occurrencesDescription); |
| 533 |
} |
| 534 |
else |
| 535 |
{ |
| 536 |
value += find(required[index0], lowerDescription, |
| 537 |
occurrencesDescription); |
| 538 |
} |
| 539 |
} |
| 540 |
|
| 541 |
for (unsigned index1 = 0; index1 < eitherOr.size(); index1++) |
| 542 |
{ |
| 543 |
vector<string> words; |
| 544 |
|
| 545 |
unsigned begin = 0, found; |
| 546 |
do |
| 547 |
{ |
| 548 |
found = eitherOr[index1].find(" OR ", begin); |
| 549 |
|
| 550 |
if (found != string::npos) |
| 551 |
{ |
| 552 |
words.push_back(eitherOr[index1].substr(begin, found - |
| 553 |
begin)); |
| 554 |
} |
| 555 |
else |
| 556 |
{ |
| 557 |
words.push_back(eitherOr[index1].substr(begin)); |
| 558 |
} |
| 559 |
|
| 560 |
begin = found + 4; |
| 561 |
} |
| 562 |
while (begin < eitherOr[index1].length() && found != |
| 563 |
string::npos); |
| 564 |
|
| 565 |
for (unsigned number = 0; number < words.size(); number++) |
| 566 |
{ |
| 567 |
if (words[index1].find("URL ") == 0) |
| 568 |
{ |
| 569 |
string fred = words[index1].substr(4); |
| 570 |
value += find(fred, lowerDescription, |
| 571 |
occurrencesDescription); |
| 572 |
} |
| 573 |
else if (words[index1].find("TITLE ") == 0) |
| 574 |
{ |
| 575 |
string fred = words[index1].substr(6); |
| 576 |
value += find(fred, lowerDescription, |
| 577 |
occurrencesDescription); |
| 578 |
} |
| 579 |
else if (words[index1].find("TEXT ") == 0) |
| 580 |
{ |
| 581 |
string fred = words[index1].substr(5); |
| 582 |
value += find(fred, lowerDescription, |
| 583 |
occurrencesDescription); |
| 584 |
} |
| 585 |
else |
| 586 |
{ |
| 587 |
value += find(words[index1], lowerDescription, |
| 588 |
occurrencesDescription); |
| 589 |
} |
| 590 |
} |
| 591 |
} |
| 592 |
|
| 593 |
for (unsigned index2 = 0; index2 < getHeadings().size(); index2++) |
| 594 |
{ |
| 595 |
string lowerHeading = string(getHeadings()[index2].length(), |
| 596 |
' '); |
| 597 |
for (unsigned number = 0; number < |
| 598 |
getHeadings()[index2].length(); number++) |
| 599 |
{ |
| 600 |
lowerHeading[number] = tolower( |
| 601 |
getHeadings()[index2][number]); |
| 602 |
} |
| 603 |
|
| 604 |
for (unsigned number0 = 0; number0 < required.size(); number0++) |
| 605 |
{ |
| 606 |
if (required[number0].find("URL ") == 0) |
| 607 |
{ |
| 608 |
string fred = required[number0].substr(4); |
| 609 |
value += find(fred, |
| 610 |
lowerHeading); |
| 611 |
} |
| 612 |
else if (required[number0].find("TITLE ") == 0) |
| 613 |
{ |
| 614 |
string fred = required[number0].substr(6); |
| 615 |
value += find(fred, |
| 616 |
lowerHeading); |
| 617 |
} |
| 618 |
else if (required[number0].find("TEXT ") == 0) |
| 619 |
{ |
| 620 |
string fred = required[number0].substr(5); |
| 621 |
value += find(fred, |
| 622 |
lowerHeading); |
| 623 |
} |
| 624 |
else |
| 625 |
{ |
| 626 |
value += find(required[number0], lowerHeading); |
| 627 |
} |
| 628 |
} |
| 629 |
|
| 630 |
for (unsigned number1 = 0; number1 < eitherOr.size(); number1++) |
| 631 |
{ |
| 632 |
vector<string> words; |
| 633 |
|
| 634 |
unsigned begin = 0, found; |
| 635 |
do |
| 636 |
{ |
| 637 |
found = eitherOr[number1].find(" OR ", begin); |
| 638 |
|
| 639 |
if (found != string::npos) |
| 640 |
{ |
| 641 |
words.push_back(eitherOr[number1].substr(begin, |
| 642 |
found - begin)); |
| 643 |
} |
| 644 |
else |
| 645 |
{ |
| 646 |
words.push_back(eitherOr[number1].substr(begin)); |
| 647 |
} |
| 648 |
|
| 649 |
begin = found + 4; |
| 650 |
} |
| 651 |
while (begin < eitherOr[number1].length() && found != |
| 652 |
string::npos); |
| 653 |
|
| 654 |
for (unsigned number = 0; number < words.size(); number++) |
| 655 |
{ |
| 656 |
if (words[number].find("URL ") == 0) |
| 657 |
{ |
| 658 |
string fred = words[number].substr(4); |
| 659 |
value += find(fred, |
| 660 |
lowerHeading); |
| 661 |
} |
| 662 |
else if (words[number].find("TITLE ") == 0) |
| 663 |
{ |
| 664 |
string fred = words[number].substr(6); |
| 665 |
value += find(fred, |
| 666 |
lowerHeading); |
| 667 |
} |
| 668 |
else if (words[number].find("TEXT ") == 0) |
| 669 |
{ |
| 670 |
string fred = words[number].substr(5); |
| 671 |
value += find(fred, |
| 672 |
lowerHeading); |
| 673 |
} |
| 674 |
else |
| 675 |
{ |
| 676 |
value += find(words[number], lowerHeading); |
| 677 |
} |
| 678 |
} |
| 679 |
} |
| 680 |
} |
| 681 |
} |
| 682 |
} |
| 683 |
} |
| 684 |
|
| 685 |
void Ranker::checkRequired() |
| 686 |
{ |
| 687 |
vector<unsigned> inURLs, inTitles, inTexts; |
| 688 |
|
| 689 |
for (unsigned index = 0; index < required.size(); index++) |
| 690 |
{ |
| 691 |
unsigned inURL = 0, inTitle = 0, inText = 0; |
| 692 |
|
| 693 |
if (required[index].find("URL ") == 0) |
| 694 |
{ |
| 695 |
string fred = required[index].substr(4); |
| 696 |
string martha = lowerURL.substr(7); |
| 697 |
inURL = find(fred, martha); |
| 698 |
|
| 699 |
if (inURL) |
| 700 |
{ |
| 701 |
string fred = required[index].substr(4); |
| 702 |
inTitle = find(fred, lowerTitle, |
| 703 |
occurrencesTitle); |
| 704 |
string martha = required[index].substr(4); |
| 705 |
inText = find(martha, lowerText, |
| 706 |
occurrencesText); |
| 707 |
|
| 708 |
if (!inTitle) inTitle++; |
| 709 |
if (!inText) inText++; |
| 710 |
} |
| 711 |
} |
| 712 |
else if (required[index].find("TITLE ") == 0) |
| 713 |
{ |
| 714 |
string fred = required[index].substr(6); |
| 715 |
inTitle = find(fred, lowerTitle, |
| 716 |
occurrencesTitle); |
| 717 |
|
| 718 |
if (inTitle) |
| 719 |
{ |
| 720 |
string fred = required[index].substr(6); |
| 721 |
string martha = lowerURL.substr(7); |
| 722 |
inURL = find(fred, martha); |
| 723 |
string george = required[index].substr(6); |
| 724 |
inText = find(george, lowerText, |
| 725 |
occurrencesText); |
| 726 |
|
| 727 |
if (!inURL) inURL++; |
| 728 |
if (!inText) inText++; |
| 729 |
} |
| 730 |
} |
| 731 |
else if (required[index].find("TEXT ") == 0) |
| 732 |
{ |
| 733 |
string fred = required[index].substr(5); |
| 734 |
inText = find(fred, lowerText, |
| 735 |
occurrencesText); |
| 736 |
|
| 737 |
if (inText) |
| 738 |
{ |
| 739 |
string fred = required[index].substr(5); |
| 740 |
string martha = lowerURL.substr(7); |
| 741 |
inURL = find(fred, martha); |
| 742 |
string george = required[index].substr(5); |
| 743 |
inTitle = find(george, lowerTitle, |
| 744 |
occurrencesTitle); |
| 745 |
|
| 746 |
if (!inURL) inURL++; |
| 747 |
if (!inTitle) inTitle++; |
| 748 |
} |
| 749 |
} |
| 750 |
else |
| 751 |
{ |
| 752 |
string fred = lowerURL.substr(7); |
| 753 |
inURL = find(required[index], fred); |
| 754 |
inTitle = find(required[index], lowerTitle, occurrencesTitle); |
| 755 |
inText = find(required[index], lowerText, occurrencesText); |
| 756 |
} |
| 757 |
|
| 758 |
inURLs.push_back(inURL); |
| 759 |
inTitles.push_back(inTitle); |
| 760 |
inTexts.push_back(inText); |
| 761 |
} |
| 762 |
|
| 763 |
unsigned inURL = evaluate(inURLs); |
| 764 |
unsigned inTitle = evaluate(inTitles); |
| 765 |
unsigned inText = evaluate(inTexts); |
| 766 |
|
| 767 |
requiredValue += (inURL && (allIn == url)) || (inTitle && (allIn == title)) |
| 768 |
|| (inText && ((allIn == text) || (allIn == all))) ? inURL + inTitle + |
| 769 |
inText : 0; |
| 770 |
} |
| 771 |
|
| 772 |
void Ranker::checkExcluded() |
| 773 |
{ |
| 774 |
vector<unsigned> inURLs, inTitles, inTexts; |
| 775 |
|
| 776 |
for (unsigned index = 0; index < excluded.size(); index++) |
| 777 |
{ |
| 778 |
unsigned inURL = 0, inTitle = 0, inText = 0; |
| 779 |
|
| 780 |
string fred = lowerURL.substr(7); |
| 781 |
inURL = find(excluded[index], fred); |
| 782 |
inTitle = find(excluded[index], lowerTitle); |
| 783 |
inText = find(excluded[index], lowerText); |
| 784 |
|
| 785 |
inURLs.push_back(inURL); |
| 786 |
inTitles.push_back(inTitle); |
| 787 |
inTexts.push_back(inText); |
| 788 |
} |
| 789 |
|
| 790 |
unsigned inURL = evaluate(inURLs); |
| 791 |
unsigned inTitle = evaluate(inTitles); |
| 792 |
unsigned inText = evaluate(inTexts); |
| 793 |
|
| 794 |
excludedValue += (inURL && (allIn == url)) || (inTitle && (allIn == title)) |
| 795 |
|| (inText && ((allIn == text) || (allIn == all))) ? inURL + inTitle + |
| 796 |
inText : 0; |
| 797 |
} |
| 798 |
|
| 799 |
void Ranker::checkEitherOr() |
| 800 |
{ |
| 801 |
vector<unsigned> inURLs, inTitles, inTexts; |
| 802 |
|
| 803 |
for (unsigned index = 0; index < eitherOr.size(); index++) |
| 804 |
{ |
| 805 |
vector<unsigned> inURLz, inTitlez, inTextz; |
| 806 |
unsigned inURL = 0, inTitle = 0, inText = 0; |
| 807 |
vector<string> words; |
| 808 |
|
| 809 |
unsigned begin = 0, found; |
| 810 |
do |
| 811 |
{ |
| 812 |
found = eitherOr[index].find(" OR ", begin); |
| 813 |
|
| 814 |
if (found != string::npos) |
| 815 |
{ |
| 816 |
words.push_back(eitherOr[index].substr(begin, found - begin)); |
| 817 |
} |
| 818 |
else |
| 819 |
{ |
| 820 |
words.push_back(eitherOr[index].substr(begin)); |
| 821 |
} |
| 822 |
|
| 823 |
begin = found + 4; |
| 824 |
} |
| 825 |
while (begin < eitherOr[index].length() && found != string::npos); |
| 826 |
|
| 827 |
for (unsigned number = 0; number < words.size(); number++) |
| 828 |
{ |
| 829 |
unsigned inURL = 0, inTitle = 0, inText = 0; |
| 830 |
|
| 831 |
if (words[number].find("URL ") == 0) |
| 832 |
{ |
| 833 |
string fred = words[number].substr(4); |
| 834 |
string martha = lowerURL.substr(7); |
| 835 |
inURL = find(fred, martha); |
| 836 |
|
| 837 |
if (inURL) |
| 838 |
{ |
| 839 |
string fred = words[number].substr(4); |
| 840 |
inTitle = find(fred, lowerTitle, |
| 841 |
occurrencesTitle); |
| 842 |
string martha = words[number].substr(4); |
| 843 |
inText = find(martha, lowerText, |
| 844 |
occurrencesText); |
| 845 |
|
| 846 |
if (!inTitle) inTitle++; |
| 847 |
if (!inText) inText++; |
| 848 |
} |
| 849 |
} |
| 850 |
else if (words[number].find("TITLE ") == 0) |
| 851 |
{ |
| 852 |
string fred = words[number].substr(6); |
| 853 |
inTitle = find(fred, lowerTitle, |
| 854 |
occurrencesTitle); |
| 855 |
|
| 856 |
if (inTitle) |
| 857 |
{ |
| 858 |
string fred = words[number].substr(6); |
| 859 |
string martha = lowerURL.substr(7); |
| 860 |
inURL = find(fred, martha); |
| 861 |
string george = words[number].substr(6); |
| 862 |
inText = find(george, lowerText, |
| 863 |
occurrencesText); |
| 864 |
|
| 865 |
if (!inURL) inURL++; |
| 866 |
if (!inText) inText++; |
| 867 |
} |
| 868 |
} |
| 869 |
else if (words[number].find("TEXT ") == 0) |
| 870 |
{ |
| 871 |
string fred = words[number].substr(5); |
| 872 |
inText = find(fred, lowerText, |
| 873 |
occurrencesText); |
| 874 |
|
| 875 |
if (inText) |
| 876 |
{ |
| 877 |
string fred = words[number].substr(5); |
| 878 |
string martha = lowerURL.substr(7); |
| 879 |
inURL = find(fred, martha); |
| 880 |
string george = words[number].substr(5); |
| 881 |
inTitle = find(george, lowerTitle, |
| 882 |
occurrencesTitle); |
| 883 |
|
| 884 |
if (!inURL) inURL++; |
| 885 |
if (!inTitle) inTitle++; |
| 886 |
} |
| 887 |
} |
| 888 |
else |
| 889 |
{ |
| 890 |
string fred = lowerURL.substr(7); |
| 891 |
inURL = find(words[number], fred); |
| 892 |
inTitle = find(words[number], lowerTitle, occurrencesTitle); |
| 893 |
inText = find(words[number], lowerText, occurrencesText); |
| 894 |
} |
| 895 |
|
| 896 |
inURLz.push_back(inURL); |
| 897 |
inTitlez.push_back(inTitle); |
| 898 |
inTextz.push_back(inText); |
| 899 |
} |
| 900 |
|
| 901 |
for (unsigned number0 = 0; number0 < inURLz.size(); number0++) |
| 902 |
{ |
| 903 |
inURL += inURLz[number0]; |
| 904 |
} |
| 905 |
|
| 906 |
for (unsigned number1 = 0; number1 < inTitlez.size(); number1++) |
| 907 |
{ |
| 908 |
inTitle += inTitlez[number1]; |
| 909 |
} |
| 910 |
|
| 911 |
for (unsigned number2 = 0; number2 < inTextz.size(); number2++) |
| 912 |
{ |
| 913 |
inText += inTextz[number2]; |
| 914 |
} |
| 915 |
|
| 916 |
inURLs.push_back(inURL); |
| 917 |
inTitles.push_back(inTitle); |
| 918 |
inTexts.push_back(inText); |
| 919 |
|
| 920 |
inURLz.clear(); |
| 921 |
inTitlez.clear(); |
| 922 |
inTextz.clear(); |
| 923 |
words.clear(); |
| 924 |
} |
| 925 |
|
| 926 |
unsigned inURL = evaluate(inURLs); |
| 927 |
unsigned inTitle = evaluate(inTitles); |
| 928 |
unsigned inText = evaluate(inTexts); |
| 929 |
|
| 930 |
eitherOrValue += (inURL && (allIn == url)) || (inTitle && (allIn == title)) |
| 931 |
|| (inText && ((allIn == text) || (allIn == all))) ? inURL + inTitle + |
| 932 |
inText : 0; |
| 933 |
} |
| 934 |
|
| 935 |
unsigned Ranker::find(string& word, string& where) |
| 936 |
{ |
| 937 |
unsigned value = 0; |
| 938 |
|
| 939 |
decrap(word); |
| 940 |
|
| 941 |
if (word == "") |
| 942 |
{ |
| 943 |
// this can happen if a word is all crap characters |
| 944 |
value++; |
| 945 |
} |
| 946 |
else if (word.find_first_of(" \n ") == string::npos) |
| 947 |
{ |
| 948 |
unsigned begin = 0, found; |
| 949 |
do |
| 950 |
{ |
| 951 |
found = where.find(word, begin); |
| 952 |
|
| 953 |
if (found != string::npos) |
| 954 |
{ |
| 955 |
bool isBefore, isAfter, before = false, after = false; |
| 956 |
isBefore = found - 1 > 0; |
| 957 |
isAfter = found + word.length() < where.length(); |
| 958 |
|
| 959 |
if (isBefore) before = isalnum(where[found - 1]) != 0; |
| 960 |
if (isAfter) after = isalnum(where[found + word.length()]) != 0; |
| 961 |
|
| 962 |
if (!before && !after) |
| 963 |
{ |
| 964 |
value++; |
| 965 |
} |
| 966 |
} |
| 967 |
|
| 968 |
begin = found + word.length(); |
| 969 |
} |
| 970 |
while (found != string::npos && begin < where.length()); |
| 971 |
} |
| 972 |
else |
| 973 |
{ |
| 974 |
value = phrase(word, where); |
| 975 |
} |
| 976 |
|
| 977 |
return value; |
| 978 |
} |
| 979 |
|
| 980 |
unsigned Ranker::find(string& word, string& where, map<unsigned, unsigned>& |
| 981 |
occurrences) |
| 982 |
{ |
| 983 |
unsigned value = 0; |
| 984 |
|
| 985 |
decrap(word); |
| 986 |
|
| 987 |
if (word == "") |
| 988 |
{ |
| 989 |
// this can happen if a word is all crap characters |
| 990 |
value++; |
| 991 |
} |
| 992 |
else if (word.find_first_of(" \n ") == string::npos) |
| 993 |
{ |
| 994 |
unsigned begin = 0, found; |
| 995 |
do |
| 996 |
{ |
| 997 |
found = where.find(word, begin); |
| 998 |
|
| 999 |
if (found != string::npos) |
| 1000 |
{ |
| 1001 |
bool isBefore, isAfter, before = false, after = false; |
| 1002 |
isBefore = found - 1 > 0; |
| 1003 |
isAfter = found + word.length() < where.length(); |
| 1004 |
|
| 1005 |
if (isBefore) before = isalnum(where[found - 1]) != 0; |
| 1006 |
if (isAfter) after = isalnum(where[found + word.length()]) != 0; |
| 1007 |
|
| 1008 |
if (!before && !after) |
| 1009 |
{ |
| 1010 |
value++; |
| 1011 |
|
| 1012 |
occurrences.insert(pair<unsigned, unsigned>(found, |
| 1013 |
word.length())); |
| 1014 |
} |
| 1015 |
} |
| 1016 |
|
| 1017 |
begin = found + word.length(); |
| 1018 |
} |
| 1019 |
while (found != string::npos && begin < where.length()); |
| 1020 |
} |
| 1021 |
else |
| 1022 |
{ |
| 1023 |
value = phrase(word, where, occurrences); |
| 1024 |
} |
| 1025 |
|
| 1026 |
return value; |
| 1027 |
} |
| 1028 |
|
| 1029 |
unsigned Ranker::phrase(string& phrase, string& where) |
| 1030 |
{ |
| 1031 |
unsigned value = 0; |
| 1032 |
vector<string> words; |
| 1033 |
|
| 1034 |
unsigned begin = 0, space; |
| 1035 |
do |
| 1036 |
{ |
| 1037 |
space = phrase.find(' ', begin); |
| 1038 |
|
| 1039 |
words.push_back(phrase.substr(begin, space - begin)); |
| 1040 |
|
| 1041 |
begin = space + 1; |
| 1042 |
} |
| 1043 |
while (space != string::npos && begin < phrase.length()); |
| 1044 |
|
| 1045 |
begin = 0; |
| 1046 |
unsigned counter = 0; |
| 1047 |
do |
| 1048 |
{ |
| 1049 |
value += this->phrase(words, 0, begin, true, where); |
| 1050 |
} |
| 1051 |
while (begin < where.length()); |
| 1052 |
|
| 1053 |
return value; |
| 1054 |
} |
| 1055 |
|
| 1056 |
unsigned Ranker::phrase(string& phrase, string& where, map<unsigned, unsigned>& |
| 1057 |
occurrences) |
| 1058 |
{ |
| 1059 |
unsigned value = 0; |
| 1060 |
vector<string> words; |
| 1061 |
|
| 1062 |
unsigned begin = 0, space; |
| 1063 |
do |
| 1064 |
{ |
| 1065 |
space = phrase.find(' ', begin); |
| 1066 |
|
| 1067 |
words.push_back(phrase.substr(begin, space - begin)); |
| 1068 |
|
| 1069 |
begin = space + 1; |
| 1070 |
} |
| 1071 |
while (space != string::npos && begin < phrase.length()); |
| 1072 |
|
| 1073 |
begin = 0; |
| 1074 |
do |
| 1075 |
{ |
| 1076 |
value += this->phrase(words, 0, begin, true, where, occurrences); |
| 1077 |
} |
| 1078 |
while (begin < where.length()); |
| 1079 |
|
| 1080 |
return value; |
| 1081 |
} |
| 1082 |
|
| 1083 |
unsigned Ranker::phrase(vector<string>& words, unsigned word, unsigned& begin, |
| 1084 |
bool start, string& where) |
| 1085 |
{ |
| 1086 |
unsigned value = 0; |
| 1087 |
bool end = !(word + 1 < words.size()); |
| 1088 |
unsigned found = where.find(words[word], begin); |
| 1089 |
unsigned newBegin = found + words[word].length(); |
| 1090 |
|
| 1091 |
if (found != string::npos) |
| 1092 |
{ |
| 1093 |
bool isBefore, isAfter, before = false, after = false; |
| 1094 |
isBefore = found - 1 > 0; |
| 1095 |
isAfter = found + words[word].length() < where.length(); |
| 1096 |
|
| 1097 |
if (isBefore) before = isalnum(where[found - 1]) != 0; |
| 1098 |
if (isAfter) after = isalnum(where[found + words[word].length()]) != 0; |
| 1099 |
|
| 1100 |
if (!before && !after) |
| 1101 |
{ |
| 1102 |
bool between = true; |
| 1103 |
if (!start) |
| 1104 |
{ |
| 1105 |
for (unsigned index = begin + 1; index < found - 1; index++) |
| 1106 |
{ |
| 1107 |
if (isalnum(where[index])) |
| 1108 |
{ |
| 1109 |
between = false; |
| 1110 |
break; |
| 1111 |
} |
| 1112 |
} |
| 1113 |
} |
| 1114 |
|
| 1115 |
if (between) |
| 1116 |
{ |
| 1117 |
if (end) |
| 1118 |
{ |
| 1119 |
begin = newBegin; |
| 1120 |
value = 1; |
| 1121 |
} |
| 1122 |
else |
| 1123 |
{ |
| 1124 |
value = phrase(words, (word + 1), newBegin, false, where); |
| 1125 |
} |
| 1126 |
} |
| 1127 |
} |
| 1128 |
} |
| 1129 |
|
| 1130 |
if (start) |
| 1131 |
{ |
| 1132 |
if (found != string::npos) |
| 1133 |
{ |
| 1134 |
begin = newBegin; |
| 1135 |
} |
| 1136 |
else |
| 1137 |
{ |
| 1138 |
begin = string::npos; |
| 1139 |
} |
| 1140 |
} |
| 1141 |
|
| 1142 |
return value; |
| 1143 |
} |
| 1144 |
|
| 1145 |
unsigned Ranker::phrase(vector<string>& words, unsigned word, unsigned& begin, |
| 1146 |
bool start, string& where, map<unsigned, unsigned>& occurrences) |
| 1147 |
{ |
| 1148 |
unsigned value = 0; |
| 1149 |
bool end = !(word + 1 < words.size()); |
| 1150 |
unsigned found = where.find(words[word], begin); |
| 1151 |
unsigned newBegin = found + words[word].length(); |
| 1152 |
|
| 1153 |
if (found != string::npos) |
| 1154 |
{ |
| 1155 |
bool isBefore, isAfter, before = false, after = false; |
| 1156 |
isBefore = found - 1 > 0; |
| 1157 |
isAfter = found + words[word].length() < where.length(); |
| 1158 |
|
| 1159 |
if (isBefore) before = isalnum(where[found - 1]) != 0; |
| 1160 |
if (isAfter) after = isalnum(where[found + words[word].length()]) != 0; |
| 1161 |
|
| 1162 |
if (!before && !after) |
| 1163 |
{ |
| 1164 |
bool between = true; |
| 1165 |
if (!start) |
| 1166 |
{ |
| 1167 |
for (unsigned index = begin + 1; index < found - 1; index++) |
| 1168 |
{ |
| 1169 |
if (isalnum(where[index])) |
| 1170 |
{ |
| 1171 |
between = false; |
| 1172 |
break; |
| 1173 |
} |
| 1174 |
} |
| 1175 |
} |
| 1176 |
|
| 1177 |
if (between) |
| 1178 |
{ |
| 1179 |
occurrences.insert(pair<unsigned, unsigned>(found, |
| 1180 |
words[word].length())); |
| 1181 |
|
| 1182 |
if (end) |
| 1183 |
{ |
| 1184 |
begin = newBegin; |
| 1185 |
value = 1; |
| 1186 |
} |
| 1187 |
else |
| 1188 |
{ |
| 1189 |
value = phrase(words, (word + 1), newBegin, false, where, |
| 1190 |
occurrences); |
| 1191 |
} |
| 1192 |
} |
| 1193 |
} |
| 1194 |
} |
| 1195 |
|
| 1196 |
if (start) |
| 1197 |
{ |
| 1198 |
if (found != string::npos) |
| 1199 |
{ |
| 1200 |
begin = newBegin; |
| 1201 |
} |
| 1202 |
else |
| 1203 |
{ |
| 1204 |
begin = string::npos; |
| 1205 |
} |
| 1206 |
} |
| 1207 |
|
| 1208 |
return value; |
| 1209 |
} |
| 1210 |
|
| 1211 |
unsigned Ranker::evaluate(vector<unsigned>& ins) |
| 1212 |
{ |
| 1213 |
unsigned in = 0; |
| 1214 |
|
| 1215 |
for (unsigned index = 0; index < ins.size(); index++) |
| 1216 |
{ |
| 1217 |
if (ins[index] > 0) |
| 1218 |
{ |
| 1219 |
in += ins[index]; |
| 1220 |
} |
| 1221 |
else |
| 1222 |
{ |
| 1223 |
in = 0; |
| 1224 |
break; |
| 1225 |
} |
| 1226 |
} |
| 1227 |
|
| 1228 |
return in; |
| 1229 |
} |
| 1230 |
|
| 1231 |
void Ranker::decrap(string& crap) |
| 1232 |
{ |
| 1233 |
unsigned begin = 0, found; |
| 1234 |
do |
| 1235 |
{ |
| 1236 |
// &, +, and # are not considered crap |
| 1237 |
found = crap.find_first_of("!\"$%\'()*,-./:;<=>?@[\\]^_`{|}~", begin); |
| 1238 |
|
| 1239 |
if (found != string::npos) |
| 1240 |
{ |
| 1241 |
crap[found] = ' '; |
| 1242 |
} |
| 1243 |
|
| 1244 |
begin = found + 1; |
| 1245 |
} |
| 1246 |
while (found != string::npos && begin < crap.length()); |
| 1247 |
|
| 1248 |
normalize(crap); |
| 1249 |
} |
