general cleanup - removed old comments, enforced naming conventions etc

backend/internal/models/alert_event.go

@@ -0,0 +1,88 @@
+package models
+
+import (
+	"context"
+	"errors"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/kjannette/koin-ping/backend/internal/domain"
+)
+
+type AlertEventModel struct {
+	pool *pgxpool.Pool
+}
+
+func NewAlertEventModel(pool *pgxpool.Pool) *AlertEventModel {
+	return &AlertEventModel{pool: pool}
+}
+
+func (m *AlertEventModel) ListRecentByUser(ctx context.Context, userID string, limit int) ([]domain.AlertEvent, error) {
+	rows, err := m.pool.Query(ctx,
+		`SELECT ae.id, ae.alert_rule_id, ae.message, ae.address_label, ae.tx_hash, ae.timestamp
+		 FROM alert_events ae
+		 JOIN alert_rules ar ON ar.id = ae.alert_rule_id
+		 JOIN addresses a ON a.id = ar.address_id
+		 WHERE a.user_id = $1
+		 ORDER BY ae.timestamp DESC
+		 LIMIT $2`,
+		userID, limit,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var events []domain.AlertEvent
+	for rows.Next() {
+		var e domain.AlertEvent
+		if err := rows.Scan(&e.ID, &e.AlertRuleID, &e.Message, &e.AddressLabel, &e.TxHash, &e.Timestamp); err != nil {
+			return nil, err
+		}
+		events = append(events, e)
+	}
+	return events, rows.Err()
+}
+
+func (m *AlertEventModel) ListRecent(ctx context.Context, limit int) ([]domain.AlertEvent, error) {
+	rows, err := m.pool.Query(ctx,
+		`SELECT id, alert_rule_id, message, address_label, tx_hash, timestamp
+		 FROM alert_events
+		 ORDER BY timestamp DESC
+		 LIMIT $1`,
+		limit,
+	)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var events []domain.AlertEvent
+	for rows.Next() {
+		var e domain.AlertEvent
+		if err := rows.Scan(&e.ID, &e.AlertRuleID, &e.Message, &e.AddressLabel, &e.TxHash, &e.Timestamp); err != nil {
+			return nil, err
+		}
+		events = append(events, e)
+	}
+	return events, rows.Err()
+}
+
+func (m *AlertEventModel) Create(ctx context.Context, alertRuleID int, message string, addressLabel *string, txHash *string) (*domain.AlertEvent, error) {
+	var e domain.AlertEvent
+	err := m.pool.QueryRow(ctx,
+		`INSERT INTO alert_events (alert_rule_id, message, address_label, tx_hash)
+		 VALUES ($1, $2, $3, $4)
+		 ON CONFLICT DO NOTHING
+		 RETURNING id, alert_rule_id, message, address_label, tx_hash, timestamp`,
+		alertRuleID, message, addressLabel, txHash,
+	).Scan(&e.ID, &e.AlertRuleID, &e.Message, &e.AddressLabel, &e.TxHash, &e.Timestamp)
+	if err != nil {
+		if errors.Is(err, pgx.ErrNoRows) {
+			// Duplicate silently skipped by ON CONFLICT DO NOTHING
+			return nil, nil
+		}
+		return nil, err
+	}
+	return &e, nil
+}