feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

app/models/telegram_bot.go

@@ -0,0 +1,77 @@
+package models
+
+import (
+	"time"
+
+	"rsgit.ru/rsmon/rsmon/app/models/concerns"
+)
+
+const (
+	// TelegramBotMessageReceived marks inbound bot messages.
+	TelegramBotMessageReceived = "received"
+	// TelegramBotMessageSent marks outbound bot replies.
+	TelegramBotMessageSent = "sent"
+	// TelegramBotStatusMain is the singleton status row name for the bot.
+	TelegramBotStatusMain = "main"
+)
+
+// TelegramBotMessage stores a Telegram bot chat message for admin history.
+type TelegramBotMessage struct {
+	concerns.Model
+
+	Direction string `gorm:"size:16;index" json:"direction"`
+	ChatID    int64  `gorm:"index" json:"chat_id"`
+	ChatType  string `gorm:"size:32" json:"chat_type"`
+	Username  string `gorm:"size:255" json:"username"`
+	Text      string `gorm:"type:text" json:"text"`
+	Command   string `gorm:"size:64" json:"command"`
+	ContactID *int64 `gorm:"index" json:"contact_id,omitempty"`
+	Error     string `gorm:"type:text" json:"error,omitempty"`
+
+	CreatedAt time.Time `json:"created_at"`
+}
+
+// TableName overrides the default table name.
+func (TelegramBotMessage) TableName() string {
+	return "telegram_bot_messages"
+}
+
+// TelegramBotStatus stores the current Telegram bot heartbeat/status.
+type TelegramBotStatus struct {
+	concerns.Model
+
+	Name      string     `gorm:"uniqueIndex;size:64;not null" json:"name"`
+	Username  string     `gorm:"size:255" json:"username"`
+	Online    bool       `gorm:"not null;default:false" json:"online"`
+	LastSeen  *time.Time `json:"last_seen,omitempty"`
+	LastError string     `gorm:"type:text" json:"last_error,omitempty"`
+
+	concerns.Timestamped
+}
+
+// TableName overrides the default table name.
+func (TelegramBotStatus) TableName() string {
+	return "telegram_bot_statuses"
+}
+
+// RecentTelegramBotMessages returns the latest Telegram bot messages, capped to a safe limit.
+func RecentTelegramBotMessages(limit int) ([]TelegramBotMessage, error) {
+	if limit <= 0 || limit > 500 {
+		limit = 100
+	}
+	messages := []TelegramBotMessage{}
+	err := DB().Order("id DESC").Limit(limit).Find(&messages).Error
+	return messages, err
+}
+
+// TelegramBotCurrentStatus returns the singleton Telegram bot status row.
+func TelegramBotCurrentStatus() (*TelegramBotStatus, error) {
+	status := TelegramBotStatus{}
+	if err := DB().Where("name = ?", TelegramBotStatusMain).First(&status).Error; err != nil {
+		return nil, err
+	}
+	if status.LastSeen == nil || time.Since(*status.LastSeen) > 2*time.Minute {
+		status.Online = false
+	}
+	return &status, nil
+}