move types to types.hpp, match hash to email

src/hash.cpp

@@ -16,6 +16,8 @@
 
 #include "hash.hpp"
 
+#include "types.hpp"
+
 #include <algorithm>
 #include <memory>
 #include <string>
@@ -30,14 +32,14 @@
 
 namespace libravatarserv::hash {
 
-std::string generate_hash(const algorithm algo, const std::string_view text) {
+std::string generate_hash(const algorithm_t algo, const std::string_view text) {
     using namespace CryptoPP;
 
     SHA256 sha256;
     Weak::MD5 md5;
-    std::unique_ptr<HashTransformation> algo_to_use{&sha256};
-    if (algo == algorithm::MD5) {
-        algo_to_use.reset(&md5);
+    HashTransformation *algo_to_use{&sha256}; // HashFilter calls free()?
+    if (algo == algorithm_t::MD5) {
+        algo_to_use = &md5;
     }
 
     std::string hash;
@@ -49,18 +51,23 @@ std::string generate_hash(const algorithm algo, const std::string_view text) {
     return hash;
 }
 
-table generate_table(const algorithm algo, const fs::path &directory) {
-    table hashtable;
+std::string find_email(const request_t &req, const fs::path &directory) {
+    bool default_present{false};
     for (const fs::path &path : fs::recursive_directory_iterator(directory)) {
         if (fs::is_regular_file(path)) {
             std::string email = path.filename();
             std::transform(email.begin(), email.end(), email.begin(),
                            ::tolower);
-            hashtable.insert({generate_hash(algo, email), email});
+            if (generate_hash(req.algo, email) == req.hash) {
+                return email;
+            }
+            if (email == "default") {
+                default_present = true;
+            }
         }
     }
 
-    return hashtable;
+    return default_present ? "default" : "";
 }
 
 bool is_valid(const std::string_view hash) {

src/hash.hpp

@@ -18,25 +18,20 @@
 #define LIBRAVATARSERV_HASH_HPP
 
 #include "fs-compat.hpp"
+#include "types.hpp"
 
-#include <map>
 #include <string>
 #include <string_view>
 
 namespace libravatarserv::hash {
 
-enum class algorithm {
-    SHA256,
-    MD5
-};
-
-using table = std::map<std::string, std::string>;
-
 // generate hash from text
-[[nodiscard]] std::string generate_hash(algorithm algo, std::string_view text);
+[[nodiscard]] std::string generate_hash(algorithm_t algo,
+                                        std::string_view text);
 
-// generate hash -> email table
-[[nodiscard]] table generate_table(algorithm algo, const fs::path &directory);
+// Match hash to email
+[[nodiscard]] std::string find_email(const request_t &req,
+                                     const fs::path &directory);
 
 // return false if invalid characters are found in hash
 [[nodiscard]] bool is_valid(std::string_view hash);

src/main.cpp

@@ -43,9 +43,11 @@ int main(int /*argc*/, char * /*argv*/[]) {
         if (req.fallback.empty()) {
             req.fallback = cfg.default_fallback;
         }
+        const std::string email{hash::find_email(req, cfg.avatar_dir)};
+
         std::cout << "  HASH: " << req.hash << "\n  SIZE: " << req.size
-                  << "\n  FALLBACK: " << req.fallback << '\n';
-        const auto hashtable{hash::generate_table(req.algo, cfg.avatar_dir)};
+                  << "\n  FALLBACK: " << req.fallback << "\n  EMAIL: " << email
+                  << '\n';
 
     } catch (const std::runtime_error &e) {
         if (std::strlen(e.what()) != 0) {

src/request.cpp

@@ -17,6 +17,7 @@
 #include "request.hpp"
 
 #include "hash.hpp"
+#include "types.hpp"
 
 #include <algorithm>
 #include <cstdint>
@@ -27,7 +28,7 @@
 
 namespace libravatarserv::request {
 
-request parse(const std::string_view uri) {
+request_t parse(const std::string_view uri) {
     constexpr std::uint8_t offset{8};
     if (uri.substr(0, offset) != "/avatar/"
         || uri.find("..", offset) != std::string_view::npos) {
@@ -35,7 +36,7 @@ request parse(const std::string_view uri) {
         throw std::runtime_error{"Invalid URL"};
     }
 
-    request req;
+    request_t req;
     req.size = 80;
 
     size_t pos{uri.find('?')};
@@ -47,9 +48,9 @@ request parse(const std::string_view uri) {
                    ::tolower);
 
     if (req.hash.size() == 64 && hash::is_valid(req.hash)) {
-        req.algo = hash::algorithm::SHA256;
+        req.algo = algorithm_t::SHA256;
     } else if (req.hash.size() == 32 && hash::is_valid(req.hash)) {
-        req.algo = hash::algorithm::MD5;
+        req.algo = algorithm_t::MD5;
     } else {
         std::cout << "Status: 400 Bad Request\n\n";
         throw std::runtime_error{"Invalid hash"};

src/request.hpp

@@ -17,23 +17,15 @@
 #ifndef LIBRAVATARSERV_REQUEST_HPP
 #define LIBRAVATARSERV_REQUEST_HPP
 
-#include "hash.hpp"
+#include "types.hpp"
 
-#include <cstdint>
 #include <string>
 #include <string_view>
 
 namespace libravatarserv::request {
 
-struct request {
-    std::string hash;
-    hash::algorithm algo;
-    std::int16_t size;
-    std::string fallback;
-};
-
 // parse request and return results
-[[nodiscard]] request parse(std::string_view uri);
+[[nodiscard]] request_t parse(std::string_view uri);
 
 // get one parameter from an URI
 [[nodiscard]] std::string_view get_parameter(std::string_view uri,

src/types.hpp

@@ -0,0 +1,38 @@
+/*  This file is part of libravatarserv.
+ *  Copyright © 2022 tastytea <tastytea@tastytea.de>
+ *
+ *  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, version 3.
+ *
+ *  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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBRAVATARSERV_TYPES_HPP
+#define LIBRAVATARSERV_TYPES_HPP
+
+#include <cstdint>
+#include <string>
+namespace libravatarserv {
+
+enum class algorithm_t {
+    SHA256,
+    MD5
+};
+
+struct request_t {
+    std::string hash;
+    algorithm_t algo;
+    std::int16_t size;
+    std::string fallback;
+};
+
+} // namespace libravatarserv
+
+#endif // LIBRAVATARSERV_TYPES_HPP