Dawn/src/dawn/asset/assetmap.c

/**
 * Copyright (c) 2024 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#include "assetmap.h"
#include "asset/asset.h"
#include "assert/assert.h"
#include "util/memory.h"

void assetMapLoadEntity(
  assetjson_t *jEnt,
  map_t *map
) {
  int32_t x = (int32_t)assetJsonGetObjectValue(jEnt, "x")->number;
  int32_t y = (int32_t)assetJsonGetObjectValue(jEnt, "y")->number;
  entitytype_t type = (entitytype_t)assetJsonGetObjectValue(
    jEnt, "type"
  )->number;

  entity_t *ent = mapEntityAdd(map);
  entityInit(ent, type, map);
  entityPositionSet(ent, x, y);

  assetjson_t *val;
  switch(type) {
    case ENTITY_TYPE_NPC:
      val = assetJsonGetObjectValue(jEnt, "name");
      if(val != NULL) {
        assertTrue(
          val->type == ASSET_JSON_DATA_TYPE_STRING,
          "assetMapLoad: NPC name is not a string!"
        );
        npcNameSet(&ent->npc, val->string);
      }

      val = assetJsonGetObjectValue(jEnt, "text");
      if(val != NULL) {
        assertTrue(
          val->type == ASSET_JSON_DATA_TYPE_STRING,
          "assetMapLoad: NPC text is not a string!"
        );
        npcTextSet(&ent->npc, val->string);
      }
      break;

    case ENTITY_TYPE_SIGN:
      val = assetJsonGetObjectValue(jEnt, "text");
      if(val != NULL) {
        assertTrue(
          val->type == ASSET_JSON_DATA_TYPE_STRING,
          "assetMapLoad: Sign text is not a string!"
        );
        signTextAppend(&ent->sign, val->string);
      }

      val = assetJsonGetObjectValue(jEnt, "texts");
      if(val != NULL) {
        assertTrue(
          val->type == ASSET_JSON_DATA_TYPE_ARRAY,
          "assetMapLoad: Sign texts is not an array!"
        );
        assertTrue(
          val->array.length <= SIGN_TEXT_COUNT_MAX,
          "assetMapLoad: Too many sign texts!"
        );
        for(int32_t i = 0; i < val->array.length; i++) {
          assetjson_t *subVal = val->array.value[i];
          assertTrue(
            subVal->type == ASSET_JSON_DATA_TYPE_STRING,
            "assetMapLoad: Sign text is not a string!"
          );
          signTextAppend(&ent->sign, subVal->string);
        }
      }
      break;

    case ENTITY_TYPE_DOOR:
      val = assetJsonGetObjectValue(jEnt, "door");
      if(val != NULL) {
        assetjson_t *door = assetJsonGetObjectValue(val, "x");
        x = (int32_t)door->number;
        assertTrue(
          door->type == ASSET_JSON_DATA_TYPE_NUMBER,
          "assetMapLoad: Door x is not a number!"
        );

        door = assetJsonGetObjectValue(val, "y");
        y = (int32_t)door->number;
        assertTrue(
          door->type == ASSET_JSON_DATA_TYPE_NUMBER,
          "assetMapLoad: Door y is not a number!"
        );
        entitydirection_t direction = (entitydirection_t)(
          assetJsonGetObjectValue(val, "direction")->number
        );
        door = assetJsonGetObjectValue(val, "map");
        maplist_t list;
        if(door == NULL) {
          list = map->list;
        } else if(door->type == ASSET_JSON_DATA_TYPE_STRING) {
          list = mapListGet(door->string);
        } else if(door->type == ASSET_JSON_DATA_TYPE_NUMBER) {
          list = (maplist_t)door->number;
        } else {
          assertUnreachable("assetMapLoad: Door map not string or number!");
        }
        doorDestinationSet(&ent->door, x, y, direction, list);
      }
      break;
    
    default:
      break;
  }
}

void assetMapLoad(
  const char_t *path,
  map_t *map
) {
  assertNotNull(map, "assetMapLoad: Map is NULL!");

  // Read in the string data.
  assetOpen(path);
  size_t length = assetGetSize();
  char_t *buffer = memoryAllocate(sizeof(char_t) * (length + 1));
  size_t read = assetRead((uint8_t*)buffer, length);
  buffer[length] = '\0';
  assertTrue(read == length, "assetMapLoad: Failed to read map data!");
  assetClose();

  // Begin parsing JSON data.
  assetjson_t *json;
  read = assetJsonParse(buffer, &json);
  memoryFree(buffer);
  
  assertTrue(
    json->type == ASSET_JSON_DATA_TYPE_OBJECT,
    "assetMapLoad: Map data is not an object!"
  );

  int32_t width = (int32_t)assetJsonGetObjectValue(json, "width")->number;
  int32_t height = (int32_t)assetJsonGetObjectValue(json, "height")->number;

  assetjson_t *layers = assetJsonGetObjectValue(json, "layers");
  assertTrue(
    layers->type == ASSET_JSON_DATA_TYPE_ARRAY,
    "assetMapLoad: Layers is not an array!"
  );

  int32_t layerCount = layers->array.length;
  assertTrue(layerCount == MAP_LAYERS_MAX, "assetMapLoad: No layers found!");

  mapInit(map, mapListGet(path), width, height, layerCount);

  // Load tile data.
  for(int32_t i = 0; i < layerCount; i++) {
    assetjson_t *layer = layers->array.value[i];
    assertTrue(
      layer->type == ASSET_JSON_DATA_TYPE_OBJECT,
      "assetMapLoad: Layer is not an object!"
    );

    assetjson_t *tiles = assetJsonGetObjectValue(layer, "tiles");
    assertTrue(
      tiles->type == ASSET_JSON_DATA_TYPE_ARRAY,
      "assetMapLoad: Tiles is not an array!"
    );
    assertTrue(
      tiles->array.length == width * height,
      "assetMapLoad: Tile count does not match map size!"
    );

    for(int32_t j = 0; j < width * height; j++) {
      map->tiles[j] = (tile_t)tiles->array.value[j]->number;
    }
  }

  // Load entity data
  assetjson_t *entities = assetJsonGetObjectValue(json, "entities");
  if(entities != NULL) {
    assertTrue(
      entities->type == ASSET_JSON_DATA_TYPE_ARRAY,
      "assetMapLoad: Entities is not an array!"
    );

    for(int32_t i = 0; i < entities->array.length; i++) {
      assetjson_t *jEnt = entities->array.value[i];
      assertTrue(
        jEnt->type == ASSET_JSON_DATA_TYPE_OBJECT,
        "assetMapLoad: Entity is not an object!"
      );
      assetMapLoadEntity(jEnt, map);
    }
  }

  // Load trigger data
  assetjson_t *triggers = assetJsonGetObjectValue(json, "triggers");
  if(triggers != NULL) {
    assertTrue(
      triggers->type == ASSET_JSON_DATA_TYPE_ARRAY,
      "assetMapLoad: Triggers is not an array!"
    );

    for(int32_t i = 0; i < triggers->array.length; i++) {
      assetjson_t *jTrig = triggers->array.value[i];
      assertTrue(
        jTrig->type == ASSET_JSON_DATA_TYPE_OBJECT,
        "assetMapLoad: Trigger is not an object!"
      );

      int32_t x = (int32_t)assetJsonGetObjectValue(jTrig, "x")->number;
      int32_t y = (int32_t)assetJsonGetObjectValue(jTrig, "y")->number;
      int32_t width = (int32_t)assetJsonGetObjectValue(jTrig, "width")->number;
      int32_t height = (int32_t)assetJsonGetObjectValue(
        jTrig, "height"
      )->number;
      triggertype_t type = (triggertype_t)assetJsonGetObjectValue(
        jTrig, "type"
      )->number;

      trigger_t *trigger = mapTriggerAdd(map);
      triggerInit(trigger, type, x, y, width, height);
    }
  }

  assetJsonDispose(json);
}