Merge branch 'main-bluePica' into main

CMakeLists.txt

@@ -3,25 +3,33 @@ project(pica
     VERSION 0.0.1
     LANGUAGES CXX
 )
+set(PROJECT_LICENSE "GPL-3.0")
 
 cmake_policy(SET CMP0076 NEW)       #allow adding sources from subdir
 cmake_policy(SET CMP0079 NEW)       #allow linking from subdirs
 
+include(GNUInstallDirs)
+
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
+set(PICA_BIN_DIR ${CMAKE_CURRENT_BINARY_DIR})
 
 find_package(nlohmann_json REQUIRED)
 find_package(FCGI REQUIRED)
 
 add_executable(pica main.cpp)
 target_include_directories(pica PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(pica PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
 
 add_subdirectory(server)
 add_subdirectory(request)
 add_subdirectory(response)
 add_subdirectory(stream)
 add_subdirectory(database)
+add_subdirectory(utils)
+
+configure_file(config.h.in config.h @ONLY)
 
 target_link_libraries(pica PRIVATE
     FCGI::FCGI
@@ -29,4 +37,4 @@ target_link_libraries(pica PRIVATE
     nlohmann_json::nlohmann_json
 )
 
-install(TARGETS pica RUNTIME DESTINATION bin)
+install(TARGETS pica RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

CONTRIBUTORS.md

@@ -0,0 +1,6 @@
+# Contributors
+
+Thank you to all the contributors who have helped make this project!
+
+- Yury Gubich ([@blue](https://git.macaw.me/blue))
+  - Initial project setup and architecture

LICENSE.md

@@ -0,0 +1,675 @@
+# GNU GENERAL PUBLIC LICENSE
+
+Version 3, 29 June 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc.
+<https://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this
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+
+## Preamble
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+of any later version published by the Free Software Foundation. If the
+Program does not specify a version number of the GNU General Public
+License, you may choose any version ever published by the Free
+Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions
+of the GNU General Public License can be used, that proxy's public
+statement of acceptance of a version permanently authorizes you to
+choose that version for the Program.
+
+Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+### 15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
+WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
+PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
+DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
+CORRECTION.
+
+### 16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
+LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+### 17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+## How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+        <one line to give the program's name and a brief idea of what it does.>
+        Copyright (C) <year>  <name of author>
+
+        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
+        (at your option) 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, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper
+mail.
+
+If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+        <program>  Copyright (C) <year>  <name of author>
+        This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+        This is free software, and you are welcome to redistribute it
+        under certain conditions; type `show c' for details.
+
+The hypothetical commands \`show w' and \`show c' should show the
+appropriate parts of the General Public License. Of course, your
+program's commands might be different; for a GUI interface, you would
+use an "about box".
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow
+the GNU GPL, see <https://www.gnu.org/licenses/>.
+
+The GNU General Public License does not permit incorporating your
+program into proprietary programs. If your program is a subroutine
+library, you may consider it more useful to permit linking proprietary
+applications with the library. If this is what you want to do, use the
+GNU Lesser General Public License instead of this License. But first,
+please read <https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -6,6 +6,7 @@
 
 - fcgi
 - nlohmann_json
+- mariadb-client
 
 
 ### Building
@@ -24,11 +25,16 @@ $ cmake --build .
 #### Webserver
 First you need a webserver. In this example I'm going to use apache.
 
-Install apache from your package manager.
+Install apache (apache2, httpd) from your package manager.
 
 Create a file like this in apache config dir (in my case it's `/etc/httpd/conf/extra/fcgi-pica.conf`)
 ```
 <Location /pica>
+    <IfModule mod_headers.c>
+        Header set Access-Control-Allow-Origin "*"
+        Header set Access-Control-Allow-Headers: "*"
+    </IfModule>
+
     ProxyPass "unix:/run/pica/pica.sock|fcgi://localhost"
     ProxyPassReverse "http://localhost"
 </Location>
@@ -39,8 +45,15 @@ Incude this file from apache config file (in my case it's `/etc/httpd/conf/httpd
 Include conf/extra/fcgi-pica.conf
 ```
 
-Also you need to have 2 modules enabled `proxy` and `proxy_fcgi`, usually you need to uncomment following lines in `/etc/httpd/conf/httpd.conf`
+Also you need to have 3 modules enabled:
+
+- `proxy`
+- `proxy_fcgi`
+- `headers`
+
+Usually you need to uncomment following lines in `/etc/httpd/conf/httpd.conf`
 ```
+LoadModule headers_module modules/mod_headers.so
 LoadModule proxy_module modules/mod_proxy.so
 LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so
 ```
@@ -49,7 +62,7 @@ In case you use debian-like distro (ubuntu) you should use `a2enmod` command ins
 ```
 # a2enmod proxy_fcgi
 ```
-This should enable both modules, because module `proxy_fcgi` has module `proxy` as a dependency.
+This should enable all modules, because module `proxy_fcgi` has module `proxy` as a dependency, and headers are supposed to be enabled.
 
 Start apache
 
@@ -57,6 +70,26 @@ Start apache
 $ sudo systemctl start httpd
 ```
 
+#### Database
+You're also goint to need a database server. For now only MySQL/Mariadb is supported. I'm going to use Mariadb as an example.
+
+First - install mariadb (the server!). Set it up, edit config, run whatever it asks you to run on installation. Making configurations, **make sure it creates a unix socket at `/run/mysqld/mysqld.sock` and user running pica has permissions to write to this socket!** By default it does, so, you're probably okay with default configuration.
+
+Next you need to login to mariadb database server, usually it's done like so:
+```
+$ mariadb -u root -p
+```
+
+It will query your password, and then you should see mariadb propt. There you need to execute following commands:
+```sql
+CREATE DATABASE pica;
+CREATE USER 'pica'@'localhost' IDENTIFIED BY 'pica';
+GRANT ALL PRIVILEGES ON pica.* TO 'pica'@'localhost';
+FLUSH PRIVILEGES;
+```
+
+Flushing privileges is not really needed, but it's typicaly written. After that just quit mariadb with `quit;` command.
+
 #### Creating a directory
 Next you need to create a directory for pica socket file
 ```

config.h.in

@@ -0,0 +1,9 @@
+#pragma once
+
+#define FULL_DATA_DIR "@CMAKE_INSTALL_FULL_DATADIR@"
+#define FULL_BIN_DIR "@CMAKE_INSTALL_FULL_BINDIR@"
+
+#define DATA_DIR "@CMAKE_INSTALL_DATADIR@"
+#define BIN_DIR "@CMAKE_INSTALL_BINDIR@"
+
+#define PROJECT_NAME "@PROJECT_NAME@"

database/CMakeLists.txt

@@ -9,3 +9,4 @@ set(SOURCES
 target_sources(pica PRIVATE ${SOURCES})
 
 add_subdirectory(mysql)
+add_subdirectory(migrations)

database/dbinterface.cpp

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "dbinterface.h"
 
 #include "mysql/mysql.h"

database/dbinterface.h

@@ -1,8 +1,12 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #include <stdexcept>
 #include <string>
 #include <memory>
+#include <stdint.h>
 
 class DBInterface {
 public:
@@ -28,6 +32,10 @@ public:
     virtual void setDatabase(const std::string& newDatabase) = 0;
     virtual void setCredentials(const std::string& login, const std::string& password) = 0;
 
+    virtual void migrate(uint8_t targetVersion) = 0;
+    virtual uint8_t getVersion() = 0;
+    virtual void setVersion(uint8_t version) = 0;
+
 protected:
     DBInterface(Type type);
 

database/migrations/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(MIGRATIONS migrations)
+configure_file(m0.sql ${PICA_BIN_DIR}/${CMAKE_INSTALL_DATADIR}/${MIGRATIONS}/m0.sql COPYONLY)
+
+install(
+    FILES
+        m0.sql
+    DESTINATION
+        ${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME}/${MIGRATIONS}
+)

database/migrations/m0.sql

@@ -0,0 +1,6 @@
+CREATE TABLE IF NOT EXISTS system (
+    `key` VARCHAR(32) PRIMARY KEY,
+    `value` TEXT
+);
+
+INSERT INTO system (`key`, `value`) VALUES ('version', '0');

database/mysql/CMakeLists.txt

@@ -1,9 +1,11 @@
 set(HEADERS
     mysql.h
+    statement.h
 )
 
 set(SOURCES
     mysql.cpp
+    statement.cpp
 )
 
 find_package(MariaDB REQUIRED)

database/mysql/mysql.cpp

@@ -1,5 +1,25 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "mysql.h"
 
+#include <fstream>
+#include <iostream>
+
+#include "mysqld_error.h"
+
+#include "statement.h"
+
+constexpr const char* updateQuery = "UPDATE system SET `value` = ? WHERE `key` = 'version'";
+
+static const std::filesystem::path buildSQLPath = "database";
+
+struct ResDeleter {
+    void operator () (MYSQL_RES* res) {
+        mysql_free_result(res);
+    }
+};
+
 MySQL::MySQL():
     DBInterface(Type::mysql),
     connection(),
@@ -83,3 +103,74 @@ void MySQL::disconnect() {
     mysql_close(con);
     mysql_init(con);            //this is ridiculous!
 }
+
+void MySQL::executeFile(const std::filesystem::path& relativePath) {
+    MYSQL* con = &connection;
+    std::filesystem::path path = sharedPath() / relativePath;
+    if (!std::filesystem::exists(path))
+        throw std::runtime_error("Error executing file "
+            + std::filesystem::absolute(path).string()
+            + ": file doesn't exist");
+
+    std::cout << "Executing file " << path << std::endl;
+    std::ifstream inputFile(path);
+    std::string query;
+    while (std::getline(inputFile, query, ';')) {
+        int result = mysql_query(con, query.c_str());
+        if (result != 0) {
+            int errcode = mysql_errno(con);
+            if (errcode == ER_EMPTY_QUERY)
+                continue;
+
+            throw std::runtime_error("Error executing file " + path.string() + ": " + mysql_error(con));
+        }
+
+    }
+}
+
+uint8_t MySQL::getVersion() {
+    MYSQL* con = &connection;
+    int result = mysql_query(con, "SELECT value FROM system WHERE `key` = 'version'");
+
+    if (result != 0) {
+        unsigned int errcode = mysql_errno(con);
+        if (errcode == ER_NO_SUCH_TABLE)
+            return 0;
+
+        throw std::runtime_error(std::string("Error executing retreiving version: ") + mysql_error(con));
+    }
+
+    std::unique_ptr<MYSQL_RES, ResDeleter> res(mysql_store_result(con));
+    if (!res)
+        throw std::runtime_error(std::string("Querying version returned no result: ") + mysql_error(con));
+
+    MYSQL_ROW row = mysql_fetch_row(res.get());
+    if (row)
+        return std::stoi(row[0]);
+    else
+        return 0;
+}
+
+void MySQL::setVersion(uint8_t version) {
+    std::string strVersion = std::to_string(version);
+    Statement statement(&connection, updateQuery);
+    statement.bind(strVersion.data(), MYSQL_TYPE_VAR_STRING);
+    statement.execute();
+}
+
+void MySQL::migrate(uint8_t targetVersion) {
+    uint8_t currentVersion = getVersion();
+
+    while (currentVersion < targetVersion) {
+        std::string fileName = "migrations/m" + std::to_string(currentVersion) + ".sql";
+        std::cout << "Performing migration "
+            << std::to_string(currentVersion)
+            << " -> "
+            << std::to_string(++currentVersion)
+        << std::endl;
+        executeFile(fileName);
+        setVersion(currentVersion);
+    }
+
+    std::cout << "Database is now on actual version " << std::to_string(targetVersion) << std::endl;
+}

database/mysql/mysql.h

@@ -1,12 +1,18 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #include <stdexcept>
+#include <filesystem>
 
 #include <mysql.h>
 
 #include "database/dbinterface.h"
+#include "utils/helpers.h"
 
 class MySQL : public DBInterface {
+    class Statement;
 public:
     MySQL();
     ~MySQL() override;
@@ -16,6 +22,13 @@ public:
     void setCredentials(const std::string& login, const std::string& password) override;
     void setDatabase(const std::string& database) override;
 
+    void migrate(uint8_t targetVersion) override;
+    uint8_t getVersion() override;
+    void setVersion(uint8_t version) override;
+
+private:
+    void executeFile(const std::filesystem::path& relativePath);
+
 protected:
     MYSQL connection;
     std::string login;

database/mysql/statement.cpp

@@ -0,0 +1,50 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "statement.h"
+
+#include <cstring>
+
+static uint64_t TIME_LENGTH = sizeof(MYSQL_TIME);
+
+MySQL::Statement::Statement(MYSQL* connection, const char* statement):
+    stmt(mysql_stmt_init(connection)),
+    param(),
+    lengths()
+{
+    int result = mysql_stmt_prepare(stmt.get(), statement, strlen(statement));
+    if (result != 0)
+        throw std::runtime_error(std::string("Error preparing statement: ") + mysql_stmt_error(stmt.get()));
+}
+
+void MySQL::Statement::bind(void* value, enum_field_types type) {
+    MYSQL_BIND& result = param.emplace_back();
+    std::memset(&result, 0, sizeof(result));
+
+    result.buffer_type = type;
+    result.buffer = value;
+
+   switch (type) {
+        case MYSQL_TYPE_STRING:
+        case MYSQL_TYPE_VAR_STRING:
+            result.length = &lengths.emplace_back(strlen(static_cast<char*>(value)));
+            break;
+        case MYSQL_TYPE_DATE:
+            result.length = &TIME_LENGTH;
+            break;
+        default:
+            lengths.pop_back();
+            throw std::runtime_error("Type: " + std::to_string(type) + " is not yet supported in bind");
+            break;
+    }
+}
+
+void MySQL::Statement::execute() {
+    int result = mysql_stmt_bind_param(stmt.get(), param.data());
+    if (result != 0)
+        throw std::runtime_error(std::string("Error binding statement: ") + mysql_stmt_error(stmt.get()));
+
+    result = mysql_stmt_execute(stmt.get());
+    if (result != 0)
+        throw std::runtime_error(std::string("Error executing statement: ") + mysql_stmt_error(stmt.get()));
+}

database/mysql/statement.h

@@ -0,0 +1,27 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <vector>
+
+#include "mysql.h"
+
+
+class MySQL::Statement {
+    struct STMTDeleter {
+        void operator () (MYSQL_STMT* stmt) {
+            mysql_stmt_close(stmt);
+        };
+    };
+public:
+    Statement(MYSQL* connection, const char* statement);
+
+    void bind(void* value, enum_field_types type);
+    void execute();
+
+private:
+    std::unique_ptr<MYSQL_STMT, STMTDeleter> stmt;
+    std::vector<MYSQL_BIND> param;
+    std::vector<uint64_t> lengths;
+};

main.cpp

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include <fcgiapp.h>
 
 #include <sys/stat.h>
@@ -5,9 +8,18 @@
 
 #include <iostream>
 
+#include "config.h"                 //autogenereted by cmake in the root of bindir
+#include "utils/helpers.h"
 #include "server/server.h"
 
-int main() {
+int main(int argc, char** argv) {
+    if (argc < 1) {
+        std::cerr << "Couldn't understang program path" << std::endl;
+        return 3;
+    }
+
+    initPaths(argv[0]);
+
     const char* socketPath = "/run/pica/pica.sock";
     int sockfd = FCGX_OpenSocket(socketPath, 1024);
     if (sockfd < 0) {

request/request.cpp

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "request.h"
 
 constexpr static const char* GET("GET");

request/request.h

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #include <memory>

response/response.cpp

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "response.h"
 
 constexpr std::array<std::string_view, static_cast<uint8_t>(Response::Status::__size)> statusCodes = {

response/response.h

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #include <string>

server/router.cpp

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "router.h"
 
 Router::Router():

server/router.h

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #include <map>

server/server.cpp

@@ -1,5 +1,10 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "server.h"
 
+constexpr uint8_t currentDbVesion = 1;
+
 Server::Server():
     terminating(false),
     requestCount(0),
@@ -15,13 +20,19 @@ Server::Server():
     db->setCredentials("pica", "pica");
     db->setDatabase("pica");
 
+    bool connected = false;
     try {
         db->connect("/run/mysqld/mysqld.sock");
+        connected = true;
         std::cout << "Successfully connected to the database" << std::endl;
+
     } catch (const std::runtime_error& e) {
         std::cerr << "Couldn't connect to the database: " << e.what() << std::endl;
     }
 
+    if (connected)
+        db->migrate(currentDbVesion);
+
     router.addRoute("info", Server::info);
     router.addRoute("env", Server::printEnvironment);
 }

server/server.h

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #include <iostream>

stream/ostream.cpp

@@ -1,9 +1,11 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "ostream.h"
 
 OStream::OStream(FCGX_Stream* _raw):
     Stream(_raw),
     std(&raw)
-{
+{}
-}
 
 OStream::~OStream() {}

stream/ostream.h

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #include <ios>

stream/stream.cpp

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #include "stream.h"
 
 Stream::Stream(FCGX_Stream* raw):

stream/stream.h

@@ -1,3 +1,6 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
 #pragma once
 
 #include <fcgio.h>

utils/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(HEADER
+    helpers.h
+)
+
+set(SOURCES
+    helpers.cpp
+)
+
+target_sources(${PROJECT_NAME} PRIVATE ${SOURCES})

utils/helpers.cpp

@@ -0,0 +1,61 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "helpers.h"
+
+#include "iostream"
+
+#include "config.h"
+
+static bool installed = false;
+static std::filesystem::path sPath;
+
+void setAbsoluteSharedPath () {
+    installed = true;
+    sPath = FULL_DATA_DIR "/" PROJECT_NAME;             // should be something like /usr/share/pica or /local/usr/share/pica
+}
+
+void initPaths(const char* programPath) {
+    std::filesystem::path pp(programPath);
+    if (pp.filename() == programPath)
+        return setAbsoluteSharedPath();
+
+    std::filesystem::path cp;
+    try {
+        cp = std::filesystem::canonical(pp);
+    } catch (const std::filesystem::filesystem_error& e) {
+        setAbsoluteSharedPath();
+        return;
+    }
+
+    if (cp.parent_path() == FULL_BIN_DIR)
+        return setAbsoluteSharedPath();
+
+    std::cout << cp << std::endl;
+    std::filesystem::path parent = cp.parent_path();
+    if (endsWith(parent.string(), BIN_DIR)) {       //this is the case when the program is installed somewhere but not system root
+        std::filesystem::path bin(BIN_DIR);         //so it will read from something like ../share/pica/ relative to the binary
+        for (const auto& hop : bin) {
+            (void)hop;                              //I do this just to make as many ups as many members are in bin
+            parent = parent.parent_path();
+        }
+        sPath = parent / DATA_DIR / PROJECT_NAME;
+    } else {
+        sPath = parent / DATA_DIR;                  //this should read something like ./share relative to the binary
+    }
+}
+
+const std::filesystem::path& sharedPath() {
+    return sPath;
+}
+
+bool endsWith(const std::string& string, const std::string& query) {
+    std::string::size_type sl = string.length();
+    std::string::size_type ql = query.length();
+    if (sl >= ql) {
+        unsigned int result = string.compare(sl - ql, ql, query);
+        return result == 0;
+    } else {
+        return false;
+    }
+}

utils/helpers.h

@@ -0,0 +1,12 @@
+//  SPDX-FileCopyrightText: 2023 Yury Gubich <blue@macaw.me>
+//  SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <filesystem>
+#include <string>
+
+void initPaths(const char* programPath);
+const std::filesystem::path& sharedPath();
+bool endsWith(const std::string& string, const std::string& query);
+