43 lines
1.7 KiB
Go
43 lines
1.7 KiB
Go
// Package cdc is the change-data-capture delivery layer. Change events are
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// captured durably by SQLite triggers into the change_log table (see the storage
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// migrations); this package POLLS that log and fans new events out, in order, to
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// in-process subscribers (the WS/SSE transport, wired in the frontend task).
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//
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// There is no durable outbox/JSONL/janitor machinery: the change_log table IS
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// the durable, ordered source of truth, and clients catch up by reading it from
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// their own offset (SSE Last-Event-ID). The poller + broadcaster here are only
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// the LIVE push on top of that.
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package cdc
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import (
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"encoding/json"
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"time"
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)
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// EventType mirrors the event_type values the DB triggers write.
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type EventType string
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const (
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EventSessionCreated EventType = "session_created"
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EventSessionUpdated EventType = "session_updated"
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EventPRCreated EventType = "pr_created"
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EventPRUpdated EventType = "pr_updated"
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EventPRCheckRecorded EventType = "pr_check_recorded"
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EventNotificationCreated EventType = "notification_created"
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EventNotificationUpdated EventType = "notification_updated"
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)
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// Event is one CDC change read from change_log. Seq is the monotonic ordering +
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// idempotency key (consumers dedup by it). SessionID is empty for project-level
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// events. Payload is the trigger-built JSON, kept raw so a typed transport can
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// narrow it by Type (the discriminated-union decode lives at the transport edge,
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// not here).
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type Event struct {
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Seq int64 `json:"seq"`
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ProjectID string `json:"projectId"`
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SessionID string `json:"sessionId,omitempty"`
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Type EventType `json:"type"`
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Payload json.RawMessage `json:"payload"`
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CreatedAt time.Time `json:"createdAt"`
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}
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