mirror of
https://github.com/binary-kitchen/doorlockd
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103 lines
2.8 KiB
C++
103 lines
2.8 KiB
C++
#ifndef LOGIC_H
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#define LOGIC_H
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#include <cstdint>
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#include <string>
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#include <thread>
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#include <condition_variable>
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#include <mutex>
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#include "config.h"
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#include "epaper.h"
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#include "door.h"
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#include "logger.h"
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/* The "Logic" class
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*
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* This class is initilized by all settings.
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*
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* It parses incoming JSON-Requests and returns the Response Code.
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*/
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class Logic
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{
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public:
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Logic(const std::chrono::seconds tokenTimeout,
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const std::string &ldapUri,
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const std::string &bindDN,
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const std::string &webPrefix);
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~Logic();
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enum Response {
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Success = 0, // Request successful
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Fail, // General non-specified error
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AlreadyUnlocked, // Authentication successful, but door is already unlocked
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AlreadyLocked, // Authentication successful, but door is already locked
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NotJson, // Request is not a valid JSON object
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JsonError, // Request is valid JSON, but does not contain necessary material
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InvalidToken, // Request contains invalid token
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InvalidCredentials, // Invalid LDAP credentials
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InvalidIP, // IP check failure
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UnknownAction, // Unknown action
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LDAPInit, // Ldap initialization failed
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};
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// Parse incoming JSON Requests
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Response parseRequest(const std::string &str);
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private:
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// Internal lock wrapper
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Response _lock();
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// Internal unlock wrapper
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Response _unlock();
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// Checks if the incoming token is valid
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bool _checkToken(const std::string &token);
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// Checks if incoming credentials against LDAP
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Response _checkLDAP(const std::string &user,
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const std::string &password);
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// Creates a new random token and draws it on the epaper.
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// stillValid indicates whether the old (previous) token is still valid
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void _createNewToken(const bool stillValid);
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const Logger &_logger;
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// Door reference
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Door &_door;
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// Epaper reference
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Epaper &_epaper;
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// Tokens are 64-bit hexadecimal values
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using Token = uint64_t;
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// The current token
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Token _curToken = { 0x0000000000000000 };
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// The previous token
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Token _prevToken = { 0x0000000000000000 };
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// Indicates whether the previous token is valid
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bool _prevValid = { false };
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// Tokens are refreshed all tokenTimout seconds
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const std::chrono::seconds _tokenTimeout;
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// Thread for asynchronosly updating tokens
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std::thread _tokenUpdater = {};
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// Thread can be force-triggered for updates using the condition variable
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std::condition_variable _tokenCondition = {};
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// stop indicator for the thread
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bool _run = true;
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// Token mutex
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std::mutex _mutex = {};
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// The URI of the ldap server
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const std::string _ldapUri;
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// LDAP bindDN
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const std::string _bindDN;
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// Prefix of the website
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const std::string _webPrefix;
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};
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#endif
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