move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/session/storage_js.go

@@ -0,0 +1,86 @@
+//go:build js && wasm
+// +build js,wasm
+
+package session
+
+import (
+	"context"
+	"syscall/js"
+
+	"github.com/go-faster/errors"
+)
+
+// WebLocalStorage is a Web Storage API based session storage.
+type WebLocalStorage struct {
+	Key string
+}
+
+func getStorage() (js.Value, bool) {
+	localStorage := js.Global().Get("localStorage")
+
+	if localStorage.IsUndefined() || localStorage.IsNull() {
+		return js.Value{}, false
+	}
+
+	const testValue = "__test__"
+	localStorage.Set(testValue, testValue)
+	value := localStorage.Get(testValue)
+	if value.IsUndefined() || value.IsNull() {
+		return js.Value{}, false
+	}
+	localStorage.Delete(testValue)
+
+	return localStorage, true
+}
+
+// ErrLocalStorageIsNotAvailable is returned if localStorage is not available and Storage can't use it.
+var ErrLocalStorageIsNotAvailable = errors.New("localStorage is not available")
+
+func catch(err *error) { // nolint:gocritic
+	if r := recover(); r != nil {
+		rErr, ok := r.(error)
+		if !ok {
+			*err = errors.Errorf("catch: %v", r)
+		} else {
+			*err = errors.Wrap(rErr, "catch")
+		}
+	}
+}
+
+// LoadSession loads session using Web Storage API.
+func (w WebLocalStorage) LoadSession(_ context.Context) (_ []byte, rerr error) {
+	defer catch(&rerr)
+
+	if w.Key == "" {
+		return nil, errors.Errorf("invalid key %q", w.Key)
+	}
+
+	store, ok := getStorage()
+	if !ok {
+		return nil, ErrLocalStorageIsNotAvailable
+	}
+
+	value := store.Call("getItem", w.Key)
+	if value.IsNull() || value.IsUndefined() {
+		return nil, ErrNotFound
+	}
+
+	return []byte(value.String()), nil
+}
+
+// StoreSession saves session using Web Storage API.
+func (w WebLocalStorage) StoreSession(_ context.Context, data []byte) (rerr error) {
+	defer catch(&rerr)
+
+	if w.Key == "" {
+		return errors.Errorf("invalid key %q", w.Key)
+	}
+
+	store, ok := getStorage()
+	if !ok {
+		return ErrLocalStorageIsNotAvailable
+	}
+
+	store.Call("setItem", w.Key, string(data))
+	return nil
+}