1 files changed, 64 insertions, 0 deletions
diff --git a/src/assets.c b/src/assets.c
new file mode 100644
index 0000000..57624ae
--- /dev/null
+++ b/src/assets.c
@@ -0,0 +1,64 @@
+#include "assets.h"
+#include "version.h"
+#include "l2su.h"
+
+#include <jansson.h>
+
+int l2_assets__download_index(json_t *version, char **path)
+{
+  const char *url = NULL;
+  const char *id = NULL;
+  const char *digeststr = NULL;
+  json_int_t jsize = 0;
+
+  l2_sha1_digest_t expect_digest;
+
+  if (json_unpack(version, "{s:{s?:s, s:s, s:I, s:s}}", "assetIndex", "url", &url, "id", &id, "size", &jsize, "sha1", &digeststr) < 0) {
+    return -1;
+  }
+
+  if (jsize < 0) return -1;
+  if (l2_sha1_digest_from_hex(&expect_digest, digeststr) < 0) return -1;
+
+  char *pathstr = l2_launcher_sprintf_alloc("%s/assets/indexes/%s.json", l2_state.paths.data, id);
+  if (!pathstr) return -1;
+
+  int res = l2_launcher_download_checksummed(url, pathstr, &expect_digest, (size_t)jsize);
+
+  if (res < 0) {
+    free(pathstr);
+    return res;
+  }
+
+  *path = pathstr;
+  return res;
+}
+
+int l2_assets__load_index(json_t *version, json_t **asset_index)
+{
+  char *path = NULL;
+  int res;
+
+  res = l2_assets__download_index(version, &path);
+
+  if (res < 0) {
+    goto cleanup;
+  }
+
+  json_error_t jerr;
+  json_t *js;
+  if (!(js = json_load_file(path, JSON_REJECT_DUPLICATES, &jerr))) {
+    CMD_ERROR("JSON error parsing asset index: %s", jerr.text);
+    res = -1;
+    goto cleanup;
+  }
+
+  free(path);
+
+  *asset_index = js;
+  return res;
+
+cleanup:
+  free(path);
+  return res;
+}