dusk/src/dusklinux/save/savelinux.c

/**
 * Copyright (c) 2026 Dominic Masters
 *
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#include "save/save.h"
#include "save/savejsonlinux.h"
#include "util/string.h"
#include "util/memory.h"
#include <sys/stat.h>
#include <errno.h>

errorret_t saveInitLinux(void) {
  stringCopy(SAVE.platform.savePath, SAVE_LINUX_PATH, SAVE_LINUX_PATH_MAX);

  if(mkdir(SAVE.platform.savePath, 0755) != 0 && errno != EEXIST) {
    errorThrow("Failed to create save directory: %s", SAVE.platform.savePath);
  }

  errorOk();
}

errorret_t saveDisposeLinux(void) {
  errorOk();
}

static void _saveSlotPathLinux(
  char_t *out, const size_t max, const uint8_t slot
) {
  snprintf(
    out, max, SAVE_LINUX_SLOT_FILE_FORMAT, SAVE.platform.savePath,
    (uint32_t)slot
  );
}

static void _saveMetaPathLinux(char_t *out, const size_t max) {
  snprintf(out, max, SAVE_LINUX_META_FILE_FORMAT, SAVE.platform.savePath);
}

errorret_t saveSlotLoadLinux(const uint8_t slot, saveslot_t *out) {
  char_t path[SAVE_LINUX_PATH_MAX];
  _saveSlotPathLinux(path, SAVE_LINUX_PATH_MAX, slot);

  yyjson_doc *doc;
  yyjson_val *root;
  bool_t found;
  errorret_t ret = saveJsonReaderOpenLinux(path, &doc, &root, &found);
  if(errorIsNotOk(ret)) { yyjson_doc_free(doc); errorChain(ret); }
  if(!found) errorOk();

  memoryZero(out, sizeof(saveslot_t));
  out->version = saveJsonReadUInt32Linux(root, "version", SAVE_SLOT_VERSION);
  saveJsonReadStringLinux(
    root, "playerName", out->playerName, SAVE_PLAYER_NAME_MAX, ""
  );
  saveJsonReadBoolArrayLinux(
    root, "globalItemCollected", out->globalItemCollected,
    SAVE_GLOBAL_ITEM_COUNT_MAX
  );
  saveJsonReadUInt8ArrayLinux(
    root, "storyFlags", out->storyFlags, SAVE_STORY_FLAG_COUNT_MAX
  );
  out->exists = true;

  yyjson_doc_free(doc);
  errorOk();
}

errorret_t saveSlotWriteLinux(const uint8_t slot, saveslot_t *slotData) {
  char_t path[SAVE_LINUX_PATH_MAX];
  _saveSlotPathLinux(path, SAVE_LINUX_PATH_MAX, slot);

  slotData->version = SAVE_SLOT_VERSION;

  savejsonwriterlinux_t writer;
  errorChain(saveJsonWriterInitLinux(&writer));
  saveJsonWriterAddUInt32Linux(&writer, "version", slotData->version);
  saveJsonWriterAddStringLinux(&writer, "playerName", slotData->playerName);
  saveJsonWriterAddBoolArrayLinux(
    &writer, "globalItemCollected", slotData->globalItemCollected,
    SAVE_GLOBAL_ITEM_COUNT_MAX
  );
  saveJsonWriterAddUInt8ArrayLinux(
    &writer, "storyFlags", slotData->storyFlags, SAVE_STORY_FLAG_COUNT_MAX
  );

  errorret_t ret = saveJsonWriterSaveLinux(&writer, path);
  saveJsonWriterDisposeLinux(&writer);
  errorChain(ret);

  slotData->exists = true;
  errorOk();
}

errorret_t saveDeleteSlotLinux(const uint8_t slot) {
  char_t path[SAVE_LINUX_PATH_MAX];
  _saveSlotPathLinux(path, SAVE_LINUX_PATH_MAX, slot);

  if(remove(path) != 0 && errno != ENOENT) {
    errorThrow("Failed to delete save slot %u: %s", (uint32_t)slot, path);
  }

  errorOk();
}

errorret_t saveMetaLoadLinux(savemeta_t *out) {
  char_t path[SAVE_LINUX_PATH_MAX];
  _saveMetaPathLinux(path, SAVE_LINUX_PATH_MAX);

  yyjson_doc *doc;
  yyjson_val *root;
  bool_t found;
  errorret_t ret = saveJsonReaderOpenLinux(path, &doc, &root, &found);
  if(errorIsNotOk(ret)) { yyjson_doc_free(doc); errorChain(ret); }
  if(!found) errorOk();

  out->version = saveJsonReadUInt32Linux(root, "version", SAVE_META_VERSION);
  out->deadzone = saveJsonReadFloatLinux(
    root, "deadzone", SAVE_META_DEADZONE_DEFAULT
  );
  out->exists = true;

  yyjson_doc_free(doc);
  errorOk();
}

errorret_t saveMetaWriteLinux(savemeta_t *meta) {
  char_t path[SAVE_LINUX_PATH_MAX];
  _saveMetaPathLinux(path, SAVE_LINUX_PATH_MAX);

  meta->version = SAVE_META_VERSION;

  savejsonwriterlinux_t writer;
  errorChain(saveJsonWriterInitLinux(&writer));
  saveJsonWriterAddUInt32Linux(&writer, "version", meta->version);
  saveJsonWriterAddFloatLinux(&writer, "deadzone", meta->deadzone);

  errorret_t ret = saveJsonWriterSaveLinux(&writer, path);
  saveJsonWriterDisposeLinux(&writer);
  errorChain(ret);

  meta->exists = true;
  errorOk();
}