feat(resource-manager): added working singleton resource manager

all external data should now be handled through the resource manager. This will take care of location on disk as well as ownership

src/resource/meson.build

@@ -0,0 +1,40 @@
+# Define the library
+resourceManager_sources = files(
+  'private/resourceManager.cpp',
+  'private/resourceManagerTypes.cpp'
+)
+
+resourceManager_headers = files(
+    'public/resourceManager.h',
+    'public/resourceManagerTypes.h'
+)
+
+dependencies = [
+    yaml_cpp_dep,
+    opatio_dep,
+    eos_dep,
+    quill_dep,
+    config_dep,
+    probe_dep,
+    mfem_dep,
+    macros_dep,
+    meshio_dep
+]
+
+libResourceHeader_dep = declare_dependency(include_directories: include_directories('public'))
+# Define the libresourceManager library so it can be linked against by other parts of the build system
+libresourceManager = static_library('resourceManager',
+    resourceManager_sources, 
+    include_directories: include_directories('public'),
+    cpp_args: ['-fvisibility=default'],
+    dependencies: dependencies,
+    install : true)
+
+resourceManager_dep = declare_dependency(
+    include_directories: include_directories('public'),
+    link_with: libresourceManager,
+    dependencies: dependencies
+)
+
+# Make headers accessible
+install_headers(resourceManager_headers, subdir : '4DSSE/resource')

src/resource/private/resourceManager.cpp

@@ -0,0 +1,68 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include <filesystem>
+
+#include "quill/LogMacros.h"
+
+#include "resourceManager.h"
+#include "resourceManagerTypes.h"
+#include "debug.h"
+
+#include "config.h"
+
+#define STRINGIFY(x) #x
+#define TOSTRING(x) STRINGIFY(x)
+
+ResourceManager::ResourceManager() {
+    std::string defaultDataDir = TOSTRING(DATA_DIR);
+    m_dataDir = m_config.get<std::string>("Data:Dir", defaultDataDir);
+    // -- Get the index file path using filesytem to make it a system safe path
+    std::string indexFilePath = m_dataDir + "/index.yaml";
+    std::filesystem::path indexFile(indexFilePath);
+
+    m_resourceConfig.loadConfig(indexFile.string());
+    std::vector<std::string> assets = m_resourceConfig.keys();
+    for (auto key : assets ) {
+        load(key);
+    }
+}
+
+
+std::vector<std::string> ResourceManager::getAvaliableResources() {
+    std::vector<std::string> resources;
+    resources = m_resourceConfig.keys();
+    return resources;
+}
+
+const Resource& ResourceManager::getResource(const std::string &name) const {
+    auto it = m_resources.find(name);
+    if (it != m_resources.end()) {
+        return it->second;
+    }
+    throw std::runtime_error("Resource " + name + " not found");
+}
+
+
+bool ResourceManager::loadResource(std::string& name) {
+    return load(name);
+}
+
+bool ResourceManager::load(const std::string& name) {
+    const std::string resourcePath = m_dataDir + "/" + m_resourceConfig.get<std::string>(name);
+    std::filesystem::path resourceFile(resourcePath);
+    if (!std::filesystem::exists(resourceFile)) {
+        LOG_ERROR(m_logger, "Resource file not found: {}", resourceFile.string());
+        return false;
+    }
+    LOG_INFO(m_logger, "Loading resource: {}", resourceFile.string());
+    if (m_resources.find(name) != m_resources.end()) {
+        LOG_INFO(m_logger, "Resource already loaded: {}", name);
+        return true;
+    }
+    Resource resource = createResource(name, resourcePath);
+    m_resources[name] = std::move(resource);
+    // -- Check if the resource is already in the map
+    return true;
+}
+

src/resource/private/resourceManagerTypes.cpp

@@ -0,0 +1,41 @@
+#include <string>
+
+#include "resourceManagerTypes.h"
+#include "opatIO.h"
+#include "meshIO.h"
+#include "eosIO.h"
+
+#include "debug.h"
+
+std::string getFirstSegment(const std::string& input) {
+    size_t pos = input.find(':');
+    if (pos == std::string::npos) {
+        // No colon found, return the entire string
+        return input;
+    } else {
+        // Return substring from start to the position of the first colon
+        return input.substr(0, pos);
+    }
+}
+
+
+Resource createResource(const std::string& type, const std::string& path) {
+    static const std::unordered_map<std::string, std::function<Resource(const std::string&)>> factoryMap = {
+        {"opac", [](const std::string& p) { return Resource(
+            std::make_unique<OpatIO>(p));
+         }},
+        {"mesh", [](const std::string& p) { return Resource(
+            std::make_unique<MeshIO>(p));
+        }},
+        {"eos", [](const std::string& p) { return Resource(
+            std::make_unique<EosIO>(p));
+        }}
+        // Add more mappings as needed
+    };
+    auto it = factoryMap.find(getFirstSegment(type));
+    if (it != factoryMap.end()) {
+        return it->second(path);
+    } else {
+        throw std::invalid_argument("Unknown resource type: " + type);
+    }
+}

src/resource/public/resourceManager.h

@@ -0,0 +1,47 @@
+#ifndef RESOURCE_MANAGER_H
+#define RESOURCE_MANAGER_H
+
+#include <vector>
+#include <string>
+#include <stdexcept>
+#include <unordered_map>
+
+#include "resourceManagerTypes.h"
+#include "config.h"
+#include "probe.h"
+#include "quill/LogMacros.h"
+
+class ResourceManager {
+private:
+    ResourceManager();
+    ResourceManager(const ResourceManager&) = delete;
+    ResourceManager& operator=(const ResourceManager&) = delete;
+    Config& m_config = Config::getInstance();
+    Probe::LogManager& m_logManager = Probe::LogManager::getInstance();
+    quill::Logger* m_logger = m_logManager.getLogger("log");
+
+    Config m_resourceConfig;
+    std::string m_dataDir;
+    std::unordered_map<std::string, Resource> m_resources;
+
+    bool load(const std::string& name);
+
+public:
+    static ResourceManager& getInstance() {
+        static ResourceManager instance;
+        return instance;
+    }
+
+    std::vector<std::string> getAvaliableResources();
+
+    const Resource& getResource(const std::string &name) const;
+    
+    bool loadResource(std::string& name);
+
+    std::unordered_map<std::string, bool> loadAllResources();
+
+
+};
+
+
+#endif // RESOURCE_MANAGER_H

src/resource/public/resourceManagerTypes.h

@@ -0,0 +1,22 @@
+#ifndef RESOURCE_MANAGER_TYPES_H
+#define RESOURCE_MANAGER_TYPES_H
+
+#include <memory>
+#include <variant>
+
+#include "opatIO.h"
+#include "helm.h"
+#include "meshIO.h"
+#include "eosIO.h"
+
+// -- Valid resource types
+using Resource = std::variant<
+                    std::unique_ptr<OpatIO>,
+                    std::unique_ptr<MeshIO>,
+                    std::unique_ptr<EosIO>>;
+
+
+std::string getFirstSegment(const std::string& input);
+Resource createResource(const std::string& type, const std::string& path);
+
+#endif // RESOURCE_MANAGER_TYPES_H