init: pristine aerc 0.20.0 source

worker/maildir/message.go

@@ -0,0 +1,144 @@
+package maildir
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/emersion/go-maildir"
+
+	"git.sr.ht/~rjarry/aerc/lib/log"
+	"git.sr.ht/~rjarry/aerc/lib/rfc822"
+	"git.sr.ht/~rjarry/aerc/models"
+	"git.sr.ht/~rjarry/aerc/worker/lib"
+)
+
+// A Message is an individual email inside of a maildir.Dir.
+type Message struct {
+	dir maildir.Dir
+	uid models.UID
+	key string
+}
+
+// NewReader reads a message into memory and returns an io.Reader for it.
+func (m Message) NewReader() (io.ReadCloser, error) {
+	return m.dir.Open(m.key)
+}
+
+// Flags fetches the set of flags currently applied to the message.
+func (m Message) Flags() ([]maildir.Flag, error) {
+	return m.dir.Flags(m.key)
+}
+
+// ModelFlags fetches the set of models.flags currently applied to the message.
+func (m Message) ModelFlags() (models.Flags, error) {
+	flags, err := m.dir.Flags(m.key)
+	if err != nil {
+		return 0, err
+	}
+	return lib.FromMaildirFlags(flags), nil
+}
+
+// SetFlags replaces the message's flags with a new set.
+func (m Message) SetFlags(flags []maildir.Flag) error {
+	return m.dir.SetFlags(m.key, flags)
+}
+
+// SetOneFlag enables or disables a single message flag on the message.
+func (m Message) SetOneFlag(flag maildir.Flag, enable bool) error {
+	flags, err := m.Flags()
+	if err != nil {
+		return fmt.Errorf("could not read previous flags: %w", err)
+	}
+	if enable {
+		flags = append(flags, flag)
+		return m.SetFlags(flags)
+	}
+	var newFlags []maildir.Flag
+	for _, oldFlag := range flags {
+		if oldFlag != flag {
+			newFlags = append(newFlags, oldFlag)
+		}
+	}
+	return m.SetFlags(newFlags)
+}
+
+// MarkForwarded either adds or removes the maildir.FlagForwarded flag
+// from the message.
+func (m Message) MarkForwarded(forwarded bool) error {
+	return m.SetOneFlag(maildir.FlagPassed, forwarded)
+}
+
+// MarkReplied either adds or removes the maildir.FlagReplied flag from the
+// message.
+func (m Message) MarkReplied(answered bool) error {
+	return m.SetOneFlag(maildir.FlagReplied, answered)
+}
+
+// Remove deletes the email immediately.
+func (m Message) Remove() error {
+	return m.dir.Remove(m.key)
+}
+
+// MessageInfo populates a models.MessageInfo struct for the message.
+func (m Message) MessageInfo() (*models.MessageInfo, error) {
+	info, err := rfc822.MessageInfo(m)
+	if err != nil {
+		return nil, err
+	}
+	info.Size, err = m.Size()
+	if err != nil {
+		// don't care if size retrieval fails
+		log.Debugf("message size: %v", err)
+	}
+	return info, nil
+}
+
+func (m Message) Size() (uint32, error) {
+	name, err := m.dir.Filename(m.key)
+	if err != nil {
+		return 0, fmt.Errorf("failed to get filename: %w", err)
+	}
+	size, err := lib.FileSize(name)
+	if err != nil {
+		return 0, fmt.Errorf("failed to get filesize: %w", err)
+	}
+	return size, nil
+}
+
+// MessageHeaders populates a models.MessageInfo struct for the message with
+// minimal information, used for sorting and threading.
+func (m Message) MessageHeaders() (*models.MessageInfo, error) {
+	info, err := rfc822.MessageHeaders(m)
+	if err != nil {
+		return nil, err
+	}
+	info.Size, err = m.Size()
+	if err != nil {
+		// don't care if size retrieval fails
+		log.Debugf("message size failed: %v", err)
+	}
+	return info, nil
+}
+
+// NewBodyPartReader creates a new io.Reader for the requested body part(s) of
+// the message.
+func (m Message) NewBodyPartReader(requestedParts []int) (io.Reader, error) {
+	f, err := m.dir.Open(m.key)
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	msg, err := rfc822.ReadMessage(f)
+	if err != nil {
+		return nil, fmt.Errorf("could not read message: %w", err)
+	}
+	return rfc822.FetchEntityPartReader(msg, requestedParts)
+}
+
+func (m Message) UID() models.UID {
+	return m.uid
+}
+
+func (m Message) Labels() ([]string, error) {
+	return nil, nil
+}