First Commit

db/logs.go

@@ -0,0 +1,78 @@
+package db
+
+import (
+	"context"
+	"time"
+)
+
+// DBLog is one persisted backend log row from the server_logs table.
+type DBLog struct {
+	ID        int64
+	CreatedAt time.Time
+	Level     string
+	Tag       string
+	Text      string
+}
+
+// InsertLog appends one log line and returns its auto-assigned id.
+func (d *DB) InsertLog(level, tag, text string) (int64, error) {
+	var id int64
+	err := d.QueryRowContext(context.Background(),
+		"INSERT INTO server_logs(level,tag,text) VALUES($1,$2,$3) RETURNING id",
+		level, tag, text,
+	).Scan(&id)
+	return id, err
+}
+
+// RecentLogs returns the most recent limit rows, oldest-first.
+func (d *DB) RecentLogs(limit int) ([]*DBLog, error) {
+	rows, err := d.QueryContext(context.Background(),
+		`SELECT id, created_at, level, tag, text
+		   FROM server_logs
+		  ORDER BY id DESC
+		  LIMIT $1`, limit)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []*DBLog
+	for rows.Next() {
+		l := &DBLog{}
+		if err := rows.Scan(&l.ID, &l.CreatedAt, &l.Level, &l.Tag, &l.Text); err != nil {
+			return nil, err
+		}
+		out = append(out, l)
+	}
+	// Reverse to oldest-first
+	for i, j := 0, len(out)-1; i < j; i, j = i+1, j-1 {
+		out[i], out[j] = out[j], out[i]
+	}
+	return out, nil
+}
+
+// ListLogsBefore returns up to limit rows with id < beforeID, oldest-first.
+func (d *DB) ListLogsBefore(beforeID int64, limit int) ([]*DBLog, error) {
+	rows, err := d.QueryContext(context.Background(),
+		`SELECT id, created_at, level, tag, text
+		   FROM server_logs
+		  WHERE id < $1
+		  ORDER BY id DESC
+		  LIMIT $2`, beforeID, limit)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []*DBLog
+	for rows.Next() {
+		l := &DBLog{}
+		if err := rows.Scan(&l.ID, &l.CreatedAt, &l.Level, &l.Tag, &l.Text); err != nil {
+			return nil, err
+		}
+		out = append(out, l)
+	}
+	// Reverse to oldest-first
+	for i, j := 0, len(out)-1; i < j; i, j = i+1, j-1 {
+		out[i], out[j] = out[j], out[i]
+	}
+	return out, nil
+}