Added API key generation

TRMNL.cpp

@@ -1,4 +1,5 @@
 #include "TRMNL.h"
+#include "helpers.h"
 
 using std::list;
 using std::map;
@@ -18,6 +19,19 @@ m_refresh_rate(refresh_rate),
 m_update_handler()
 {}
 
+TRMNL::TRMNL(const nlohmann::json& j)
+: m_id(""),
+m_api_key(""),
+m_friendly_id(""),
+m_refresh_rate(DEFAULT_REFRESH_RATE),
+m_update_handler()
+{
+	json_extract(j, "ID", m_id);
+	json_extract(j, "api_key", m_api_key);
+	json_extract(j, "friendly_id", m_friendly_id);
+	json_extract(j, "refresh_rate", m_refresh_rate);
+}
+
 const string& TRMNL::id() const
 {
 	return m_id;
@@ -108,47 +122,6 @@ void to_json(json& j, const TRMNL& trmnl)
 	};
 }
 
-void from_json(const json& j, TRMNL& trmnl)
-{
-	bool updated = false;
-	try
-	{
-		j.at("ID").get_to(trmnl.m_id);
-		updated = true;
-	}
-	catch (const std::exception& e)
-	{}
-
-	try
-	{
-		j.at("api_key").get_to(trmnl.m_api_key);
-		updated = true;
-	}
-	catch (const std::exception& e)
-	{}
-
-	try
-	{
-		j.at("friendly_id").get_to(trmnl.m_friendly_id);
-		updated = true;
-	}
-	catch (const std::exception& e)
-	{}
-
-	try
-	{
-		j.at("refresh_rate").get_to(trmnl.m_refresh_rate);
-		updated = true;
-	}
-	catch (const std::exception& e)
-	{}
-
-	if (updated && trmnl.m_update_handler)
-	{
-		trmnl.m_update_handler(trmnl);
-	}
-}
-
 void TRMNLContainer::TRMNL_update_handler(const TRMNL& trmnl)
 {
 	auto it = m_by_id.find(trmnl.m_id);
@@ -164,6 +137,20 @@ void TRMNLContainer::TRMNL_update_handler(const TRMNL& trmnl)
 	}
 }
 
+TRMNLContainer& TRMNLContainer::operator=(const TRMNLContainer& other)
+{
+	m_devices = other.m_devices;
+	m_by_id = other.m_by_id;
+	m_by_friendly = other.m_by_friendly;
+
+	for (TRMNL& device : m_devices)
+	{
+		device.set_update_handler([this](const TRMNL& trmnl){ TRMNL_update_handler(trmnl); });
+	}
+
+	return *this;
+}
+
 void TRMNLContainer::add_device(TRMNL trmnl)
 {
 	if (trmnl.m_id.empty())
@@ -171,7 +158,6 @@ void TRMNLContainer::add_device(TRMNL trmnl)
 		return;
 	}
 
-	trmnl.set_update_handler([this](const TRMNL& trmnl){ TRMNL_update_handler(trmnl); });
 	auto it = m_devices.insert(m_devices.end(), trmnl);
 
 	m_by_id[trmnl.m_id] = it;
@@ -180,6 +166,8 @@ void TRMNLContainer::add_device(TRMNL trmnl)
 	{
 		m_by_friendly[trmnl.m_friendly_id] = it;
 	}
+
+	it->set_update_handler([this](const TRMNL& trmnl){ TRMNL_update_handler(trmnl); });
 }
 
 TRMNL* TRMNLContainer::get_device_by_id(const string& id)
@@ -217,16 +205,3 @@ void to_json(json& j, const TRMNLContainer& cont)
 {
 	j = cont.m_devices;
 }
-
-void from_json(const json& j, TRMNLContainer& cont)
-{
-	if (!j.is_array())
-	{
-		return;
-	}
-
-	for (int i = 0; i < j.size(); ++i)
-	{
-		cont.add_device(j[i]);
-	}
-}

TRMNL.h

@@ -9,6 +9,8 @@
 
 #include "json.hpp"
 
+constexpr int DEFAULT_REFRESH_RATE = 300;
+
 class TRMNL
 {
 private:
@@ -20,11 +22,13 @@ private:
 	std::function<void (const TRMNL& trmnl)> m_update_handler;
 
 public:
-	// Constructor
+	// Constructors
 	TRMNL(const std::string& id = "",
 		const std::string& api_key = "",
 		const std::string& friendly_id = "",
-		int refresh_rate = 600);
+		int refresh_rate = DEFAULT_REFRESH_RATE);
+
+	TRMNL(const nlohmann::json& j);
 
 	// Getters
 	const std::string& id() const;
@@ -43,7 +47,6 @@ public:
 	static std::string friendly_from_id(std::string id);
 
 	friend void to_json(nlohmann::json& j, const TRMNL& trmnl);
-	friend void from_json(const nlohmann::json& j, TRMNL& trmnl);
 	friend class TRMNLContainer;
 };
 
@@ -58,6 +61,7 @@ private:
 
 public:
 	TRMNLContainer() = default;
+	TRMNLContainer& operator=(const TRMNLContainer& other);
 
 	void add_device(TRMNL trmnl);
 
@@ -67,7 +71,6 @@ public:
 	void clear();
 
 	friend void to_json(nlohmann::json& j, const TRMNLContainer& cont);
-	friend void from_json(const nlohmann::json& j, TRMNLContainer& cont);
 };
 
 #endif // TRMNL_H_

main.cpp

@@ -18,6 +18,56 @@ using nlohmann::json;
 
 using namespace std;
 
+constexpr int API_KEY_LENGHT = 16;
+
+string generate_api_key(int len = API_KEY_LENGHT)
+{
+	string result = "";
+	std::random_device rand;
+	std::uniform_int_distribution distribution(0, 63);
+	int single;
+	char symbol;
+
+	if (len < 0)
+	{
+		len = API_KEY_LENGHT;
+	}
+
+	for (int i = 0; i < len; ++i)
+	{
+		single = distribution(rand);
+		if (single <= 9)
+		{
+			symbol = '0' + single;
+		}
+		else if ((single >= 10) && (single <= 35))
+		{
+			symbol = 'A' + single - 10;
+		}
+		else if ((single >= 36) && (single <= 61))
+		{
+			symbol = 'a' + single - 36;
+		}
+		else if (62 == single)
+		{
+			symbol = '+';
+		}
+		else if (63 == single)
+		{
+			symbol = '/';
+		}
+		// This should never happen
+		else
+		{
+			symbol = '?';
+		}
+
+		result += symbol;
+	}
+
+	return result;
+}
+
 void reload_container(TRMNLContainer& container, const string& filename)
 {
 	json j;
@@ -27,7 +77,13 @@ void reload_container(TRMNLContainer& container, const string& filename)
 		return;
 	}
 	container.clear();
-	container = j;
+	if (j.is_array())
+	{
+		for (int i = 0; i < j.size(); ++i)
+		{
+			container.add_device(j[i]);
+		}
+	}
 }
 
 int main(int argc, char **argv)
@@ -97,8 +153,7 @@ int main(int argc, char **argv)
 		return -1;
 	}
 
-	container.clear();
-	container = devs;
+	reload_container(container, devices_filename);
 
 	auto setup_handler = [&container, &devices_filename](const httplib::Request& req, httplib::Response& res)
 	{
@@ -152,8 +207,7 @@ int main(int argc, char **argv)
 		if (trmnl->api_key().empty())
 		{
 			should_dump = true;
-			// TODO: Randomly generate key here
-			trmnl->api_key("nullptr");
+			trmnl->api_key(generate_api_key());
 		}
 
 		response["status"] = 200;