From d90f8b0f05fb8585f1d7190e457bc8790dc02c2f Mon Sep 17 00:00:00 2001
From: Matthieu Gautier <mgautier@kymeria.fr>
Date: Sat, 10 Aug 2019 17:06:17 +0200
Subject: [PATCH] Add a name_mapper mapping the HumanReadable name to the id.

---
 include/name_mapper.h | 17 +++++++++++++
 src/meson.build       |  1 +
 src/name_mapper.cpp   | 59 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+)
 create mode 100644 src/name_mapper.cpp

diff --git a/include/name_mapper.h b/include/name_mapper.h
index 37c86e865..3df594c12 100644
--- a/include/name_mapper.h
+++ b/include/name_mapper.h
@@ -21,10 +21,13 @@
 #define KIWIX_NAMEMAPPER_H
 
 #include <string>
+#include <map>
 
 namespace kiwix
 {
 
+class Library;
+
 class NameMapper {
   public:
     virtual ~NameMapper() = default;
@@ -39,6 +42,20 @@ class IdNameMapper : public NameMapper {
     virtual std::string getIdForName(const std::string& name) { return name; };
 };
 
+class HumanReadableNameMapper : public NameMapper {
+  private:
+    std::map<std::string, std::string> m_idToName;
+    std::map<std::string, std::string> m_nameToId;
+
+  public:
+    HumanReadableNameMapper(kiwix::Library& library, bool withAlias);
+    virtual ~HumanReadableNameMapper() = default;
+    virtual std::string getNameForId(const std::string& id);
+    virtual std::string getIdForName(const std::string& name);
+};
+
+
+
 }
 
 #endif
diff --git a/src/meson.build b/src/meson.build
index 8b158ae46..08da8652a 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -20,6 +20,7 @@ kiwix_sources = [
   'tools/networkTools.cpp',
   'tools/otherTools.cpp',
   'kiwixserve.cpp',
+  'name_mapper.cpp',
   'server/request_context.cpp',
   'server/response.cpp'
 ]
diff --git a/src/name_mapper.cpp b/src/name_mapper.cpp
new file mode 100644
index 000000000..1b749dd33
--- /dev/null
+++ b/src/name_mapper.cpp
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2019 Matthieu Gautier <mgautier@kymeria.fr>
+ *
+ * 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 "name_mapper.h"
+#include "library.h"
+#include "tools/regexTools.h"
+#include <iostream>
+
+namespace kiwix {
+
+HumanReadableNameMapper::HumanReadableNameMapper(kiwix::Library& library, bool withAlias) {
+  for (auto& bookId: library.filter(kiwix::Filter().local(true).valid(true))) {
+    auto& currentBook = library.getBookById(bookId);
+    auto bookName = currentBook.getHumanReadableIdFromPath();
+    m_idToName[bookId] = bookName;
+    m_nameToId[bookName] = bookId;
+
+    if (!withAlias)
+      continue;
+
+    auto aliasName = replaceRegex(bookName, "", "_[[:digit:]]{4}-[[:digit:]]{2}$");
+    if (m_nameToId.find(aliasName) == m_nameToId.end()) {
+      m_nameToId[aliasName] = bookId;
+    } else {
+      auto alreadyPresentPath = library.getBookById(aliasName).getPath();
+      std::cerr << "Path collision: " << alreadyPresentPath
+                << " and " << currentBook.getPath()
+                << " can't share the same URL path '" << aliasName << "'."
+                << " Therefore, only " << alreadyPresentPath
+                << " will be served." << std::endl;
+    }
+  }
+}
+
+std::string HumanReadableNameMapper::getNameForId(const std::string& id) {
+  return m_idToName.at(id);
+}
+
+std::string HumanReadableNameMapper::getIdForName(const std::string& name) {
+  return m_nameToId.at(name);
+}
+
+}