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cache/fscache.cpp

@@ -0,0 +1,62 @@
+#include <filesystem>
+#include <fstream>
+#include "fscache.h"
+#include "../logger.h"
+
+FsCache::FsCache(std::string path)
+{
+	if(!std::filesystem::exists(path))
+	{
+		throw std::runtime_error { "Directory does not exist" };
+	}
+	this->path = path;
+}
+
+std::string FsCache::getFilePath(std::string_view path) const
+{
+	std::filesystem::path ps { path };
+	std::string name = ps.filename();
+	return std::filesystem::path { this->path } / name;
+}
+std::optional<std::string> FsCache::get(std::string_view key) const
+{
+	std::string path = getFilePath(key);
+	if(std::filesystem::exists(path))
+	{
+		return utils::readCompleteFile(path);
+	}
+	return { };
+}
+
+void FsCache::put(std::string_view key, std::string val)
+{
+	std::string path = std::filesystem::path { this->path } / key;
+	std::fstream f1;
+	f1.open(path, std::ios::out);
+	f1 << val;
+}
+
+void FsCache::remove(std::string_view key)
+{
+	std::filesystem::remove_all(std::filesystem::path { this->path} / key);
+}
+
+void FsCache::removePrefix(std::string_view prefix)
+{
+	//TODO: lock dir
+	for(auto &entry : std::filesystem::directory_iterator(std::filesystem::path { this->path }))
+	{
+		if(static_cast<std::string>(entry.path().filename()).find(prefix) == 0)
+		{
+				 std::filesystem::remove_all(entry);
+		}
+	}
+}
+
+void FsCache::clear()
+{
+	for(auto &entry : std::filesystem::directory_iterator(std::filesystem::path { this->path }))
+	{
+		std::filesystem::remove_all(entry);
+	}
+}

cache/fscache.h

@@ -0,0 +1,20 @@
+#ifndef FSCACHE_H
+#define FSCACHE_H
+#include "icache.h"
+class FsCache : public ICache
+{
+private:
+	std::string path;
+	std::string getFilePath(std::string_view path) const;
+public:
+	FsCache(std::string directory);
+	std::optional<std::string> get(std::string_view key) const;
+	void put(std::string_view key, std::string val);
+	void remove(std::string_view key);
+	void removePrefix(std::string_view prefix);
+	void clear();
+	using ICache::ICache;
+	~FsCache() { }
+};
+
+#endif // FSCACHE_H

cache/icache.h

@@ -0,0 +1,18 @@
+#ifndef ICACHE_H
+#define ICACHE_H
+#include <string>
+#include <string_view>
+#include <optional>
+#include "../utils.h"
+class ICache
+{
+public:
+	virtual std::optional<std::string> get(std::string_view key) const = 0;
+	virtual void put(std::string_view key, std::string val) = 0;
+	virtual void remove(std::string_view key) = 0;
+	virtual void removePrefix(std::string_view prefix) = 0;
+	virtual void clear() = 0;
+	virtual ~ICache() { }
+};
+
+#endif // ICACHE_H