Lucas RayanandClaude Sonnet 5
0ec0698079
Adds the second F2 sub-project on top of the merged IMAP core: full SEARCH criteria matching (flags, dates, size, headers, body/text, NOT/OR), EXPUNGE (soft-delete via expunged_at), COPY, and MOVE (RFC 6851, advertised via CapMove/CapUIDPlus). Verified end-to-end with a real go-imap/v2 client against embedded Postgres. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
91 lines
3.2 KiB
Go
91 lines
3.2 KiB
Go
package usecase
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import (
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"context"
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"errors"
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"github.com/alexedwards/argon2id"
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"github.com/google/uuid"
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"lambdamail/protocols/internal/application/port"
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)
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// ErrAuthFailed is returned by Login for any credential problem - unknown
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// address, wrong password, or (once AuthRepository filters it) an inactive
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// mailbox/domain. Deliberately the same error in every case: distinguishing
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// them would let a client enumerate valid addresses (PLAN.md section 14.6).
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var ErrAuthFailed = errors.New("imap session: authentication failed")
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// ErrNoSuchFolder is returned by SelectFolder when the named folder doesn't exist.
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var ErrNoSuchFolder = errors.New("imap session: no such folder")
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// ImapSessionUseCase implements the read/auth half of PLAN.md section 3's
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// HandleImapCommandUseCase (this sub-project's scope: LOGIN, LIST, SELECT,
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// FETCH, STORE; SEARCH/EXPUNGE/IDLE/MOVE land in later sub-projects).
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type ImapSessionUseCase struct {
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auth port.AuthRepository
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folders port.ImapFolderRepository
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messages port.MessageQueryRepository
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flags port.FlagRepository
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blobs port.BlobReader
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expunger port.ExpungeRepository
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copier port.CopyRepository
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}
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func NewImapSessionUseCase(auth port.AuthRepository, folders port.ImapFolderRepository, messages port.MessageQueryRepository, flags port.FlagRepository, blobs port.BlobReader, expunger port.ExpungeRepository, copier port.CopyRepository) *ImapSessionUseCase {
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return &ImapSessionUseCase{auth: auth, folders: folders, messages: messages, flags: flags, blobs: blobs, expunger: expunger, copier: copier}
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}
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func (uc *ImapSessionUseCase) Login(ctx context.Context, address, password string) (string, error) {
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rec, err := uc.auth.FindByAddress(ctx, address)
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if err != nil {
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return "", err
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}
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if rec == nil {
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return "", ErrAuthFailed
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}
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match, err := argon2id.ComparePasswordAndHash(password, rec.PasswordHash)
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if err != nil {
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return "", err
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}
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if !match {
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return "", ErrAuthFailed
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}
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return rec.ID.String(), nil
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}
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func (uc *ImapSessionUseCase) ListFolders(ctx context.Context, mailboxID string) ([]port.ImapFolderRecord, error) {
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return uc.folders.ListFolders(ctx, mailboxID)
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}
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func (uc *ImapSessionUseCase) SelectFolder(ctx context.Context, mailboxID, name string) (*port.ImapFolderRecord, error) {
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rec, err := uc.folders.FindByName(ctx, mailboxID, name)
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if err != nil {
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return nil, err
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}
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if rec == nil {
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return nil, ErrNoSuchFolder
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}
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return rec, nil
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}
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func (uc *ImapSessionUseCase) FetchMessages(ctx context.Context, folderID string) ([]port.MessageRecord, error) {
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return uc.messages.ListMessages(ctx, folderID)
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}
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func (uc *ImapSessionUseCase) ReadBlob(ctx context.Context, blobID uuid.UUID) ([]byte, error) {
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return uc.blobs.ReadByID(ctx, blobID)
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}
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func (uc *ImapSessionUseCase) SetFlags(ctx context.Context, folderID string, uid uint32, op port.FlagOp, flags []string) error {
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return uc.flags.SetFlags(ctx, folderID, uid, op, flags)
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}
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func (uc *ImapSessionUseCase) Expunge(ctx context.Context, folderID string, uids []uint32) error {
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return uc.expunger.Expunge(ctx, folderID, uids)
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}
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func (uc *ImapSessionUseCase) CopyMessages(ctx context.Context, sourceFolderID string, uids []uint32, destFolderID string) ([]port.CopiedMessage, error) {
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return uc.copier.CopyMessages(ctx, sourceFolderID, uids, destFolderID)
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}
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