Momentum-Apps/game/level.c

#include <game/level.h>

/****** Level ******/

static void level_start(Level *level, GameManager *manager, void *context)
{
    UNUSED(manager);
    LevelContext *level_context = context;
    // check if the world exists
    if (!world_exists(level_context->id))
    {
        FURI_LOG_E("Game", "World does not exist");
        easy_flipper_dialog("[WORLD ERROR]", "No world data installed.\n\n\nSettings -> Game ->\nInstall Official World Pack");
        draw_example_world(level);
        return;
    }
    // draw the world
    if (!draw_json_world_furi(level, load_furi_world(level_context->id)))
    {
        FURI_LOG_E("Game", "World exists but failed to draw.");
        draw_example_world(level);
    }
}

static void level_alloc_tree_world(Level *level, GameManager *manager, void *context)
{
    UNUSED(level);
    LevelContext *level_context = context;
    snprintf(level_context->id, sizeof(level_context->id), "tree_world");
    level_context->index = 0;
    // Add player entity to the level
    player_spawn(level, manager);
}
static void level_alloc_example_world(Level *level, GameManager *manager, void *context)
{
    UNUSED(level);
    LevelContext *level_context = context;
    snprintf(level_context->id, sizeof(level_context->id), "example_world");
    level_context->index = 1;
    // Add player entity to the level
    player_spawn(level, manager);
}

Level *level_tree;
Level *level_example;

const LevelBehaviour tree_level = {
    .alloc = level_alloc_tree_world,      // called once, when level allocated
    .free = NULL,                         // called once, when level freed
    .start = level_start,                 // called when level is changed to this level
    .stop = NULL,                         // called when level is changed from this level
    .context_size = sizeof(LevelContext), // size of level context, will be automatically allocated and freed
};
const LevelBehaviour example_level = {
    .alloc = level_alloc_example_world,   // called once, when level allocated
    .free = NULL,                         // called once, when level freed
    .start = level_start,                 // called when level is changed to this level
    .stop = NULL,                         // called when level is changed from this level
    .context_size = sizeof(LevelContext), // size of level context, will be automatically allocated and freed
};

void level_alloc_world(Level *level, GameManager *manager, void *context)
{
    UNUSED(level);
    LevelContext *level_context = context;
    snprintf(level_context->id, sizeof(level_context->id), "%s", level_contexts[level_context->index].id);
    level_context->index = level_contexts[level_context->index].index;
    // Add player entity to the level
    player_spawn(level, manager);
}

bool level_load_all()
{
    char file_path[128];
    snprintf(
        file_path,
        sizeof(file_path),
        STORAGE_EXT_PATH_PREFIX "/apps_data/flip_world/worlds.json");

    FuriString *world_data = flipper_http_load_from_file(file_path);
    if (!world_data)
    {
        FURI_LOG_E(TAG, "Failed to load world data");
        return false;
    }

    const char *json_data = furi_string_get_cstr(world_data);
    if (!json_data)
    {
        FURI_LOG_E(TAG, "Failed to get world data");
        furi_string_free(world_data);
        return false;
    }

    const LevelBehaviour new_behavior = {
        .alloc = level_alloc_world,
        .free = NULL,
        .start = level_start,
        .stop = NULL,
        .context_size = sizeof(LevelContext),
    };

    for (int i = 0; i < 10; i++)
    {
        char *json = get_json_array_value("worlds", i, json_data);
        if (!json)
        {
            FURI_LOG_E(TAG, "Failed to get worlds. Data likely empty");
            break;
        }

        char *world_id = get_json_value("name", json);
        if (!world_id)
        {
            FURI_LOG_E(TAG, "Failed to get world id");
            furi_string_free(world_data);
            free(json);
            return false;
        }

        snprintf(level_contexts[i].id, sizeof(level_contexts[i].id), "%s", "example_world");
        // safely copy the i value to the index
        level_contexts[i].index = i;
        level_behaviors[i] = &new_behavior;
        level_count++;
        free(json);
        free(world_id);
    }

    furi_string_free(world_data);
    return true;
}

// array of LevelBehaviour structures
const LevelBehaviour *level_behaviors[10] = {0};
LevelContext level_contexts[] = {0};
Level *levels[] = {0};
int level_count = 0;