Enter I18nStringDB

src/meson.build

@@ -28,6 +28,7 @@ kiwix_sources = [
   'server/response.cpp',
   'server/internalServer.cpp',
   'server/internalServer_catalog_v2.cpp',
+  'server/i18n.cpp',
   'opds_catalog.cpp',
   'version.cpp'
 ]

src/server/i18n.cpp

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2022 Veloman Yunkan <veloman.yunkan@gmail.com>
+ *
+ * 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 "i18n.h"
+
+#include <algorithm>
+#include <map>
+
+namespace kiwix
+{
+
+const char* I18nStringTable::get(const std::string& key) const
+{
+  const I18nString* const begin = entries;
+  const I18nString* const end = begin + entryCount;
+  const I18nString* found = std::lower_bound(begin, end, key,
+      [](const I18nString& a, const std::string& k) {
+        return a.key < k;
+  });
+  return (found == end || found->key != key) ? nullptr : found->value;
+}
+
+namespace
+{
+
+const I18nString enStrings[] = {
+  // must be sorted by key
+  { "suggest-full-text-search", "containing '{{{SEARCH_TERMS}}}'..."}
+};
+
+#define ARRAY_ELEMENT_COUNT(a) (sizeof(a)/sizeof(a[0]))
+
+const I18nStringTable i18nStringTables[] = {
+  { "en", ARRAY_ELEMENT_COUNT(enStrings), enStrings }
+};
+
+class I18nStringDB
+{
+public: // functions
+  I18nStringDB() {
+    for ( size_t i = 0; i < ARRAY_ELEMENT_COUNT(i18nStringTables); ++i ) {
+      const auto& t = i18nStringTables[i];
+      lang2TableMap[t.lang] = &t;
+    }
+    enStrings = lang2TableMap.at("en");
+  };
+
+  std::string get(const std::string& lang, const std::string& key) const {
+    const char* s = getStringsFor(lang)->get(key);
+    if ( s == nullptr ) {
+      s = enStrings->get(key);
+      if ( s == nullptr ) {
+        throw std::runtime_error("Invalid message id");
+      }
+    }
+    return s;
+  }
+
+private: // functions
+  const I18nStringTable* getStringsFor(const std::string& lang) const {
+    try {
+      return lang2TableMap.at(lang);
+    } catch(const std::out_of_range&) {
+      return enStrings;
+    }
+  }
+
+private: // data
+  std::map<std::string, const I18nStringTable*> lang2TableMap;
+  const I18nStringTable* enStrings;
+};
+
+} // unnamed namespace
+
+std::string getTranslatedString(const std::string& lang, const std::string& key)
+{
+  static const I18nStringDB stringDb;
+
+  return stringDb.get(lang, key);
+}
+
+} // namespace kiwix

src/server/i18n.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2022 Veloman Yunkan <veloman.yunkan@gmail.com>
+ *
+ * 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.
+ */
+
+#ifndef KIWIX_SERVER_I18N
+#define KIWIX_SERVER_I18N
+
+#include <string>
+
+namespace kiwix
+{
+
+struct I18nString {
+  const char* const key;
+  const char* const value;
+};
+
+struct I18nStringTable {
+  const char* const lang;
+  const size_t entryCount;
+  const I18nString* const entries;
+
+  const char* get(const std::string& key) const;
+};
+
+std::string getTranslatedString(const std::string& lang, const std::string& key);
+
+} // namespace kiwix
+
+#endif // KIWIX_SERVER_I18N

src/server/internalServer.cpp

@@ -55,6 +55,7 @@ extern "C" {
 #include "searcher.h"
 #include "search_renderer.h"
 #include "opds_dumper.h"
+#include "i18n.h"
 
 #include <zim/uuid.h>
 #include <zim/error.h>
@@ -446,10 +447,7 @@ std::string makeFulltextSearchSuggestion(const std::string& queryString)
 {
   MustacheData data;
   data.set("SEARCH_TERMS", queryString);
-  // NOTE: Search terms are **not** HTML-escaped at this point.
-  // NOTE: HTML-escaping is performed when the result of this function
-  // NOTE: is expanded into the suggestions.json template
-  const std::string tmpl("containing '{{{SEARCH_TERMS}}}'...");
+  const std::string tmpl = getTranslatedString("en", "suggest-full-text-search");
   return render_template(tmpl, data);
 }