WithLogger (imap/client.go)

Implements an IMAP client with functional options for logging, auth, and mailbox handling.

// Source: https://github.com/obra/msgvault | License: MIT | Copyright 2025-2026 Wes McKinney
// Provided via justclaw.it.com; keep this notice with the code.
package imap

import (
	"context"
	"errors"
	"fmt"
	"log/slog"
	"slices"
	"strconv"
	"strings"
	"sync"
	"time"

	imap "github.com/emersion/go-imap/v2"
	"github.com/emersion/go-imap/v2/imapclient"
	gmailapi "go.kenn.io/msgvault/internal/gmail"
)

// Option is a functional option for Client.
type Option func(*Client)

// WithLogger sets the logger.
func WithLogger(logger *slog.Logger) Option {
	return func(c *Client) { c.logger = logger }
}

// WithTokenSource sets a callback that provides OAuth2 access tokens
// for XOAUTH2 SASL authentication. Required when Config.AuthMethod is AuthXOAuth2.
func WithTokenSource(fn func(ctx context.Co

... (truncated -- full source via MCP)