Initial open source release

internal/compat/tdesktop/defaults.go

@@ -0,0 +1,96 @@
+package tdesktop
+
+import (
+	"crypto/sha256"
+	"encoding/binary"
+	"time"
+
+	"github.com/gotd/td/tg"
+)
+
+const (
+	appConfigHash     = 4
+	countriesListHash = 1
+	timezonesListHash = 1
+)
+
+// AppConfig returns the fallback TDesktop startup app config used when HelpService is absent.
+func AppConfig(hash int) tg.HelpAppConfigClass {
+	if hash == appConfigHash {
+		return &tg.HelpAppConfigNotModified{}
+	}
+	return &tg.HelpAppConfig{
+		Hash:   appConfigHash,
+		Config: readMarkAppConfig(),
+	}
+}
+
+func readMarkAppConfig() *tg.JSONObject {
+	return &tg.JSONObject{Value: []tg.JSONObjectValue{
+		{Key: "chat_read_mark_size_threshold", Value: &tg.JSONNumber{Value: 50}},
+		{Key: "chat_read_mark_expire_period", Value: &tg.JSONNumber{Value: 604800}},
+		{Key: "pm_read_date_expire_period", Value: &tg.JSONNumber{Value: 604800}},
+		{Key: "quote_length_max", Value: &tg.JSONNumber{Value: 1024}},
+		{Key: "telegram_antispam_group_size_min", Value: &tg.JSONNumber{Value: 200}},
+		{Key: "telegram_antispam_user_id", Value: &tg.JSONString{Value: "5434988373"}},
+	}}
+}
+
+// TimezonesList returns a small non-empty timezone set for TDesktop business settings preloading.
+func TimezonesList(hash int) tg.HelpTimezonesListClass {
+	if hash == timezonesListHash {
+		return &tg.HelpTimezonesListNotModified{}
+	}
+	return &tg.HelpTimezonesList{
+		Hash: timezonesListHash,
+		Timezones: []tg.Timezone{
+			{ID: "Etc/UTC", Name: "UTC", UtcOffset: 0},
+			{ID: "America/New_York", Name: "Eastern Time", UtcOffset: -5 * 60 * 60},
+			{ID: "America/Chicago", Name: "Central Time", UtcOffset: -6 * 60 * 60},
+			{ID: "America/Denver", Name: "Mountain Time", UtcOffset: -7 * 60 * 60},
+			{ID: "America/Los_Angeles", Name: "Pacific Time", UtcOffset: -8 * 60 * 60},
+			{ID: "Asia/Shanghai", Name: "China Standard Time", UtcOffset: 8 * 60 * 60},
+		},
+	}
+}
+
+// CountriesList returns the fallback login country list used when HelpService is absent.
+func CountriesList(hash int) tg.HelpCountriesListClass {
+	if hash == countriesListHash {
+		return &tg.HelpCountriesListNotModified{}
+	}
+	return &tg.HelpCountriesList{
+		Hash: countriesListHash,
+		Countries: []tg.HelpCountry{
+			{
+				ISO2:        "US",
+				DefaultName: "United States",
+				CountryCodes: []tg.HelpCountryCode{
+					{CountryCode: "1", Prefixes: []string{"1"}},
+				},
+			},
+			{
+				ISO2:        "CN",
+				DefaultName: "China",
+				CountryCodes: []tg.HelpCountryCode{
+					{CountryCode: "86", Prefixes: []string{"86"}},
+				},
+			},
+		},
+	}
+}
+
+// LoginToken returns a short-lived placeholder token for TDesktop's QR-login
+// screen. First phase only supports phone login, but TDesktop expects this RPC
+// to produce an auth.loginToken while the QR screen is visible.
+func LoginToken(now time.Time, authKeyID [8]byte, sessionID int64) *tg.AuthLoginToken {
+	var seed [len(authKeyID) + 8 + 8]byte
+	copy(seed[:len(authKeyID)], authKeyID[:])
+	binary.LittleEndian.PutUint64(seed[len(authKeyID):], uint64(sessionID))
+	binary.LittleEndian.PutUint64(seed[len(authKeyID)+8:], uint64(now.UnixNano()))
+	token := sha256.Sum256(seed[:])
+	return &tg.AuthLoginToken{
+		Expires: int(now.Add(30 * time.Second).Unix()),
+		Token:   token[:],
+	}
+}