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node_modules/node-sass/src/custom_importer_bridge.cpp

@@ -0,0 +1,104 @@
+#include <nan.h>
+#include <stdexcept>
+#include "custom_importer_bridge.h"
+#include "create_string.h"
+
+SassImportList CustomImporterBridge::post_process_return_value(v8::Local<v8::Value> returned_value) const {
+  SassImportList imports = 0;
+  Nan::HandleScope scope;
+
+  if (returned_value->IsArray()) {
+    v8::Local<v8::Array> array = returned_value.As<v8::Array>();
+
+    imports = sass_make_import_list(array->Length());
+
+    for (size_t i = 0; i < array->Length(); ++i) {
+      v8::Local<v8::Value> value;
+      Nan::MaybeLocal<v8::Value> unchecked = Nan::Get(array, static_cast<uint32_t>(i));
+
+      if (!unchecked.ToLocal(&value) || !value->IsObject()) {
+        imports[i] = sass_make_import_entry(0, 0, 0);
+        sass_import_set_error(imports[i], "returned array must only contain object literals", -1, -1);
+        continue;
+      }
+
+      v8::Local<v8::Object> object = value.As<v8::Object>();
+
+      if (value->IsNativeError()) {
+        char* message = create_string(Nan::Get(object, Nan::New<v8::String>("message").ToLocalChecked()));
+
+        imports[i] = sass_make_import_entry(0, 0, 0);
+
+        sass_import_set_error(imports[i], message, -1, -1);
+        free(message);
+      }
+      else {
+        imports[i] = get_importer_entry(object);
+      }
+    }
+  }
+  else if (returned_value->IsNativeError()) {
+    imports = sass_make_import_list(1);
+    v8::Local<v8::Object> object = returned_value.As<v8::Object>();
+    char* message = create_string(Nan::Get(object, Nan::New<v8::String>("message").ToLocalChecked()));
+
+    imports[0] = sass_make_import_entry(0, 0, 0);
+
+    sass_import_set_error(imports[0], message, -1, -1);
+    free(message);
+  }
+  else if (returned_value->IsObject()) {
+    imports = sass_make_import_list(1);
+    imports[0] = get_importer_entry(returned_value.As<v8::Object>());
+  }
+
+  return imports;
+}
+
+Sass_Import* CustomImporterBridge::check_returned_string(Nan::MaybeLocal<v8::Value> value, const char *msg) const
+{
+    v8::Local<v8::Value> checked;
+    if (value.ToLocal(&checked)) {
+      if (!checked->IsUndefined() && !checked->IsString()) {
+        goto err;
+      } else {
+        return nullptr;
+      }
+    }
+err:
+    auto entry = sass_make_import_entry(0, 0, 0);
+    sass_import_set_error(entry, msg, -1, -1);
+    return entry;
+}
+
+Sass_Import* CustomImporterBridge::get_importer_entry(const v8::Local<v8::Object>& object) const {
+  Nan::MaybeLocal<v8::Value> returned_file = Nan::Get(object, Nan::New<v8::String>("file").ToLocalChecked());
+  Nan::MaybeLocal<v8::Value> returned_contents = Nan::Get(object, Nan::New<v8::String>("contents").ToLocalChecked());
+  Nan::MaybeLocal<v8::Value> returned_map = Nan::Get(object, Nan::New<v8::String>("map").ToLocalChecked());
+  Sass_Import *err;
+
+  if ((err = check_returned_string(returned_file, "returned value of `file` must be a string")))
+    return err;
+
+  if ((err = check_returned_string(returned_contents, "returned value of `contents` must be a string")))
+    return err;
+
+  if ((err = check_returned_string(returned_map, "returned value of `returned_map` must be a string")))
+    return err;
+
+  char* path = create_string(returned_file);
+  char* contents = create_string(returned_contents);
+  char* srcmap = create_string(returned_map);
+
+  return sass_make_import_entry(path, contents, srcmap);
+}
+
+std::vector<v8::Local<v8::Value>> CustomImporterBridge::pre_process_args(std::vector<void*> in) const {
+  std::vector<v8::Local<v8::Value>> out;
+
+  for (void* ptr : in) {
+    out.push_back(Nan::New<v8::String>((char const*)ptr).ToLocalChecked());
+  }
+
+  return out;
+}