Dummy application of new libzim search API

Didn't take any advantage of the new libzim search API. Just fixed the
libkiwix build in the most straightforward way.

include/searcher.h

@@ -154,7 +154,7 @@ class Searcher
                      const bool verbose = false);
 
   std::vector<Reader*> readers;
-  SearcherInternal* internal;
+  std::unique_ptr<SearcherInternal> internal;
   std::string searchPattern;
   unsigned int estimatedResultCount;
   unsigned int resultStart;

src/reader.cpp

@@ -495,14 +495,16 @@ bool Reader::searchSuggestionsSmart(const string& prefix,
   bool retVal = false;
 
   /* Try to search in the title using fulltext search database */
-  auto suggestionSearch = zim::Search(*zimArchive);
-  suggestionSearch.set_query(prefix);
-  suggestionSearch.set_range(0, suggestionsCount);
-  suggestionSearch.set_suggestion_mode(true);
-
-  if (suggestionSearch.get_matches_estimated()) {
-    for (auto current = suggestionSearch.begin();
-         current != suggestionSearch.end();
+
+  auto suggestionSearcher = zim::Searcher(*zimArchive);
+  zim::Query suggestionQuery;
+  suggestionQuery.setQuery(prefix, true);
+  auto suggestionSearch = suggestionSearcher.search(suggestionQuery);
+
+  if (suggestionSearch.getEstimatedMatches()) {
+    const auto suggestions = suggestionSearch.getResults(0, suggestionsCount);
+    for (auto current = suggestions.begin();
+         current != suggestions.end();
          current++) {
       std::vector<std::string> suggestion;
       suggestion.push_back(current->getTitle());

src/searcher.cpp

@@ -35,7 +35,7 @@ namespace kiwix
 class _Result : public Result
 {
  public:
-  _Result(zim::Search::iterator& iterator);
+  _Result(zim::SearchResultSet::iterator iterator);
   virtual ~_Result(){};
 
   virtual std::string get_url();
@@ -48,26 +48,22 @@ class _Result : public Result
   virtual int get_readerIndex();
 
  private:
-  zim::Search::iterator iterator;
+  zim::SearchResultSet::iterator iterator;
 };
 
-struct SearcherInternal {
-  const zim::Search* _search;
-  zim::Search::iterator current_iterator;
-
-  SearcherInternal() : _search(NULL) {}
-  ~SearcherInternal()
+struct SearcherInternal : zim::SearchResultSet {
+  explicit SearcherInternal(const zim::SearchResultSet& srs)
+    : zim::SearchResultSet(srs)
+    , current_iterator(srs.begin())
   {
-    if (_search != NULL) {
-      delete _search;
-    }
   }
+
+  zim::SearchResultSet::iterator current_iterator;
 };
 
 /* Constructor */
 Searcher::Searcher()
-    : internal(new SearcherInternal()),
-      searchPattern(""),
+    : searchPattern(""),
       estimatedResultCount(0),
       resultStart(0),
       resultEnd(0)
@@ -78,7 +74,6 @@ Searcher::Searcher()
 /* Destructor */
 Searcher::~Searcher()
 {
-  delete internal;
 }
 
 bool Searcher::add_reader(Reader* reader)
@@ -122,13 +117,13 @@ void Searcher::search(const std::string& search,
           archives.push_back(*(*current)->getZimArchive());
       }
     }
-    zim::Search* search = new zim::Search(archives);
-    search->set_verbose(verbose);
-    search->set_query(unaccentedSearch);
-    search->set_range(resultStart, resultEnd);
-    internal->_search = search;
-    internal->current_iterator = internal->_search->begin();
-    this->estimatedResultCount = internal->_search->get_matches_estimated();
+    zim::Searcher searcher(archives);
+    zim::Query query;
+    query.setQuery(unaccentedSearch, false);
+    query.setVerbose(verbose);
+    zim::Search search = searcher.search(query);
+    internal.reset(new SearcherInternal(search.getResults(resultStart, resultEnd)));
+    this->estimatedResultCount = search.getEstimatedMatches();
   }
 
   return;
@@ -163,28 +158,28 @@ void Searcher::geo_search(float latitude, float longitude, float distance,
        current++) {
     archives.push_back(*(*current)->getZimArchive());
   }
-  zim::Search* search = new zim::Search(archives);
-  search->set_verbose(verbose);
-  search->set_query("");
-  search->set_georange(latitude, longitude, distance);
-  search->set_range(resultStart, resultEnd);
-  internal->_search = search;
-  internal->current_iterator = internal->_search->begin();
-  this->estimatedResultCount = internal->_search->get_matches_estimated();
+  zim::Searcher searcher(archives);
+  zim::Query query;
+  query.setVerbose(verbose);
+  query.setQuery("", false);
+  query.setGeorange(latitude, longitude, distance);
+  zim::Search search = searcher.search(query);
+  internal.reset(new SearcherInternal(search.getResults(resultStart, resultEnd)));
+  this->estimatedResultCount = search.getEstimatedMatches();
 }
 
 
 void Searcher::restart_search()
 {
-  if (internal->_search) {
-    internal->current_iterator = internal->_search->begin();
+  if (internal.get()) {
+    internal->current_iterator = internal->begin();
   }
 }
 
 Result* Searcher::getNextResult()
 {
-  if (internal->_search &&
-             internal->current_iterator != internal->_search->end()) {
+  if (internal.get() &&
+             internal->current_iterator != internal->end()) {
     Result* result = new _Result(internal->current_iterator);
     internal->current_iterator++;
     return result;
@@ -218,14 +213,13 @@ void Searcher::suggestions(std::string& searchPattern, const bool verbose)
        current++) {
     archives.push_back(*(*current)->getZimArchive());
   }
-  zim::Search* search = new zim::Search(archives);
-  search->set_verbose(verbose);
-  search->set_query(unaccentedSearch);
-  search->set_range(resultStart, resultEnd);
-  search->set_suggestion_mode(true);
-  internal->_search = search;
-  internal->current_iterator = internal->_search->begin();
-  this->estimatedResultCount = internal->_search->get_matches_estimated();
+  zim::Searcher searcher(archives);
+  zim::Query query;
+  query.setVerbose(verbose);
+  query.setQuery(unaccentedSearch, true);
+  zim::Search search = searcher.search(query);
+  internal.reset(new SearcherInternal(search.getResults(resultStart, resultEnd)));
+  this->estimatedResultCount = search.getEstimatedMatches();
 }
 
 /* Return the result count estimation */
@@ -234,7 +228,7 @@ unsigned int Searcher::getEstimatedResultCount()
   return this->estimatedResultCount;
 }
 
-_Result::_Result(zim::Search::iterator& iterator)
+_Result::_Result(zim::SearchResultSet::iterator iterator)
     : iterator(iterator)
 {
 }