Initial commit

tg_parser/internal/domain/channel.go

@@ -0,0 +1,68 @@
+package domain
+
+import (
+	"fmt"
+
+	"github.com/google/uuid"
+)
+
+type Channel struct {
+	ID           uuid.UUID
+	TelegramID   int64
+	Username     string
+	Title        string
+	AccessHash   int64
+	Pts          int
+	InviteLink   string
+	IsAccessible bool
+}
+
+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 invite_link=%t}",
+		c.ID,
+		c.TelegramID,
+		c.Username,
+		c.Title,
+		c.AccessHash,
+		c.Pts,
+		c.InviteLink != "",
+	)
+}
+
+type ChannelDiff struct {
+	NewPts         int
+	NewPosts       []Post
+	DeletedPosts   []Post
+	UpdatedChannel *Channel
+}

tg_parser/internal/domain/post.go

@@ -0,0 +1,36 @@
+package domain
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+type Post struct {
+	ID          uuid.UUID
+	ChannelID   uuid.UUID
+	MessageID   int
+	Text        string
+	Link        string
+	Views       int
+	PublishedAt time.Time
+}
+
+func NewPost(channel Channel, messageID int, text string, views int, publishedAt time.Time) Post {
+	link := ""
+	if channel.Username != "" {
+		link = fmt.Sprintf("https://t.me/%s/%d", channel.Username, messageID)
+	} else if channel.TelegramID != 0 {
+		link = fmt.Sprintf("https://t.me/c/%d/%d", ChannelIDFromChatID(channel.TelegramID), messageID)
+	}
+	return Post{
+		ID:          uuid.New(),
+		ChannelID:   channel.ID,
+		MessageID:   messageID,
+		Text:        text,
+		Link:        link,
+		Views:       views,
+		PublishedAt: publishedAt,
+	}
+}

tg_parser/internal/domain/views_snapshot.go

@@ -0,0 +1,14 @@
+package domain
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+)
+
+type ViewsSnapshot struct {
+	ViewsCount int
+	FetchedAt  time.Time
+
+	PostID uuid.UUID
+}