Move the search html renderer in a different class than the searcher.

This is two different functionnalies, we don't need to polute the searcher
api with things to render the html.

src/search_renderer.cpp

@@ -0,0 +1,151 @@
+/*
+ * Copyright 2011 Emmanuel Engelhart <kelson@kiwix.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU  General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+
+#include <cmath>
+
+#include "search_renderer.h"
+#include "searcher.h"
+#include "reader.h"
+#include "library.h"
+#include "name_mapper.h"
+
+#include <zim/search.h>
+
+#include <mustache.hpp>
+#include "kiwixlib-resources.h"
+
+
+namespace kiwix
+{
+
+/* Constructor */
+SearchRenderer::SearchRenderer(Searcher* searcher, NameMapper* mapper)
+    : mp_searcher(searcher),
+      mp_nameMapper(mapper),
+      protocolPrefix("zim://"),
+      searchProtocolPrefix("search://?")
+{}
+
+/* Destructor */
+SearchRenderer::~SearchRenderer() = default;
+
+void SearchRenderer::setSearchPattern(const std::string& pattern)
+{
+  this->searchPattern = pattern;
+}
+
+void SearchRenderer::setSearchContent(const std::string& name)
+{
+  this->searchContent = name;
+}
+
+void SearchRenderer::setProtocolPrefix(const std::string& prefix)
+{
+  this->protocolPrefix = prefix;
+}
+
+void SearchRenderer::setSearchProtocolPrefix(const std::string& prefix)
+{
+  this->searchProtocolPrefix = prefix;
+}
+
+std::string SearchRenderer::getHtml()
+{
+  kainjow::mustache::data results{kainjow::mustache::data::type::list};
+
+  mp_searcher->restart_search();
+  Result* p_result = NULL;
+  while ((p_result = mp_searcher->getNextResult())) {
+    kainjow::mustache::data result;
+    result.set("title", p_result->get_title());
+    result.set("url", p_result->get_url());
+    result.set("snippet", p_result->get_snippet());
+    auto readerIndex = p_result->get_readerIndex();
+    auto reader = mp_searcher->get_reader(readerIndex);
+    result.set("resultContentId", mp_nameMapper->getNameForId(reader->getId()));
+
+    if (p_result->get_wordCount() >= 0) {
+      result.set("wordCount", kiwix::beautifyInteger(p_result->get_wordCount()));
+    }
+
+    results.push_back(result);
+    delete p_result;
+  }
+
+  // pages
+  kainjow::mustache::data pages{kainjow::mustache::data::type::list};
+
+  auto resultStart = mp_searcher->getResultStart();
+  auto resultEnd = mp_searcher->getResultEnd();
+  auto resultCountPerPage = resultEnd - resultStart;
+  auto estimatedResultCount = mp_searcher->getEstimatedResultCount();
+
+  unsigned int pageStart
+      = resultStart / resultCountPerPage >= 5
+            ? resultStart / resultCountPerPage - 4
+            : 0;
+  unsigned int pageCount
+      = estimatedResultCount / resultCountPerPage + 1 - pageStart;
+
+  if (pageCount > 10) {
+    pageCount = 10;
+  } else if (pageCount == 1) {
+    pageCount = 0;
+  }
+
+  for (unsigned int i = pageStart; i < pageStart + pageCount; i++) {
+    kainjow::mustache::data page;
+    page.set("label", to_string(i + 1));
+    page.set("start", to_string(i * resultCountPerPage));
+    page.set("end", to_string((i + 1) * resultCountPerPage));
+
+    if (i * resultCountPerPage == resultStart) {
+      page.set("selected", true);
+    }
+    pages.push_back(page);
+  }
+
+  std::string template_str = RESOURCE::templates::search_result_html;
+  kainjow::mustache::mustache tmpl(template_str);
+
+  kainjow::mustache::data allData;
+  allData.set("results", results);
+  allData.set("pages", pages);
+  allData.set("hasResult", estimatedResultCount != 0);
+  allData.set("count", kiwix::beautifyInteger(estimatedResultCount));
+  allData.set("searchPattern", kiwix::encodeDiples(this->searchPattern));
+  allData.set("searchPatternEncoded", urlEncode(this->searchPattern));
+  allData.set("resultStart", to_string(resultStart + 1));
+  allData.set("resultEnd", to_string(min(resultEnd, estimatedResultCount)));
+  allData.set("resultRange", to_string(resultCountPerPage));
+  allData.set("resultLastPageStart", to_string(estimatedResultCount > resultCountPerPage
+             ? round(estimatedResultCount / resultCountPerPage) * resultCountPerPage
+             : 0));
+  allData.set("lastResult", to_string(estimatedResultCount));
+  allData.set("protocolPrefix", this->protocolPrefix);
+  allData.set("searchProtocolPrefix", this->searchProtocolPrefix);
+  allData.set("contentId", this->searchContent);
+
+  std::stringstream ss;
+  tmpl.render(allData, [&ss](const std::string& str) { ss << str; });
+  return ss.str();
+}
+
+}