preset_manager.hpp

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#pragma once

 
#include <pulp/state/content_capability_manifest.hpp>
#include <pulp/state/store.hpp>
#include <string>
#include <vector>
#include <functional>
#include <filesystem>
#include <optional>
 
namespace pulp::state {
 

struct PresetInfo {
    std::string name;                  
    std::filesystem::path path;        
    bool is_factory = false;           
    std::string folder;                
    std::string author;                
    std::string description;           
    std::vector<std::string> tags;     
};

struct ParamSetting {
    ParamID id = 0;
    float value = 0.0f;
};

using ContentPresetSource = std::function<std::vector<PresetInfo>(
    const ContentCapabilityManifest& manifest, const std::filesystem::path& data_root)>;

class PresetManager {
public:
    PresetManager(StateStore& store, const std::string& manufacturer,
                  const std::string& plugin_name);
 
    // ── Save/Load ────────────────────────────────────────────────────────

    bool save(const std::string& name, const std::string& folder = "");

    bool load(const PresetInfo& preset);

    bool load(const std::filesystem::path& path);

    std::optional<std::vector<ParamSetting>> read_values(const std::filesystem::path& path) const;

    bool delete_preset(const PresetInfo& preset);

    bool rename(const PresetInfo& preset, const std::string& new_name);

    std::optional<PresetInfo> import_file(const std::filesystem::path& source);
 
    // ── Discovery ────────────────────────────────────────────────────────

    std::vector<PresetInfo> all_presets() const;

    std::vector<PresetInfo> factory_presets() const;

    std::vector<PresetInfo> user_presets() const;

    std::vector<PresetInfo> content_presets() const;

    void set_content_preset_source(ContentPresetSource source);

    void set_content_plugin_id(std::string plugin_id);

    void set_content_capabilities(std::vector<std::string> capabilities);

    void set_content_data_root(std::filesystem::path data_root);

    void set_content_manifest(const ContentCapabilityManifest& manifest);

    void refresh();
 
    // ── Current preset tracking ──────────────────────────────────────────

    const std::string& current_preset_name() const { return current_name_; }
    void set_current_preset_name(const std::string& name) { current_name_ = name; }

    bool has_unsaved_changes() const { return unsaved_changes_; }
    void mark_as_changed() { unsaved_changes_ = true; }
    void mark_as_saved() { unsaved_changes_ = false; }
 
    // ── Navigation ───────────────────────────────────────────────────────

    bool load_next();
    bool load_previous();
 
    // ── Callbacks ────────────────────────────────────────────────────────

    std::function<void(const PresetInfo&)> on_preset_loaded;

    std::function<void()> on_list_changed;
 
    // ── Paths ────────────────────────────────────────────────────────────

    std::filesystem::path user_presets_dir() const { return user_dir_; }

    std::filesystem::path factory_presets_dir() const { return factory_dir_; }

    void set_factory_presets_dir(std::filesystem::path dir) {
        factory_dir_ = std::move(dir);
        cache_valid_ = false;
    }
 
private:
    StateStore& store_;
    std::string manufacturer_;
    std::string plugin_name_;
    std::filesystem::path user_dir_;
    std::filesystem::path factory_dir_;
    std::filesystem::path content_data_root_;
    std::string content_plugin_id_;
    std::vector<std::string> content_capabilities_;
    std::vector<std::string> content_kinds_;
    ContentPresetSource content_source_;
 
    std::string current_name_;
    bool unsaved_changes_ = false;
 
    std::vector<PresetInfo> cached_presets_;
    bool cache_valid_ = false;
 
    void scan_directory(const std::filesystem::path& dir, bool is_factory,
                        std::vector<PresetInfo>& out) const;
    void ensure_user_dir();
    static std::filesystem::path platform_presets_root();
};
 
} // namespace pulp::state