парсер

tg_parser/internal/domain/channel.go

@@ -0,0 +1,65 @@
+package domain
+
+import (
+	"fmt"
+
+	"github.com/google/uuid"
+)
+
+type Channel struct {
+	ID         uuid.UUID
+	TelegramID int64
+	Username   string
+	Title      string
+	AccessHash int64
+	Pts        int
+}
+
+const channelIDOffset int64 = 1000000000000
+
+// ChannelID returns the positive channel identifier expected by Telegram API.
+func (c Channel) ChannelID() int64 {
+	return ChannelIDFromChatID(c.TelegramID)
+}
+
+// ChannelIDFromChatID converts stored chat IDs (Bot API style) to channel IDs used by TDLib.
+func ChannelIDFromChatID(chatID int64) int64 {
+	if chatID >= 0 {
+		return chatID
+	}
+
+	return -chatID - channelIDOffset
+}
+
+// ChatIDFromChannelID converts Telegram channel IDs to Bot API style chat IDs (-100...).
+func ChatIDFromChannelID(channelID int64) int64 {
+	return -channelIDOffset - channelID
+}
+
+// NormalizeChatID ensures that TelegramID is stored in chat-id form (negative).
+func NormalizeChatID(id int64) int64 {
+	if id < 0 {
+		return id
+	}
+
+	return ChatIDFromChannelID(id)
+}
+
+func (c Channel) String() string {
+	return fmt.Sprintf(
+		"Channel{id=%s telegram_id=%d username=%q title=%q access_hash=%d pts=%d}",
+		c.ID,
+		c.TelegramID,
+		c.Username,
+		c.Title,
+		c.AccessHash,
+		c.Pts,
+	)
+}
+
+type ChannelDiff struct {
+	NewPts         int
+	NewPosts       []Post
+	DeletedPosts   []Post
+	UpdatedChannel *Channel
+}