init: pristine aerc 0.20.0 source

worker/mbox/models.go

@@ -0,0 +1,185 @@
+package mboxer
+
+import (
+	"bytes"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"io"
+
+	"git.sr.ht/~rjarry/aerc/lib/rfc822"
+	"git.sr.ht/~rjarry/aerc/models"
+)
+
+type mailboxContainer struct {
+	mailboxes map[string]*container
+}
+
+func (md *mailboxContainer) Names() []string {
+	files := make([]string, 0)
+	for file := range md.mailboxes {
+		files = append(files, file)
+	}
+	return files
+}
+
+func (md *mailboxContainer) Mailbox(f string) (*container, bool) {
+	mb, ok := md.mailboxes[f]
+	return mb, ok
+}
+
+func (md *mailboxContainer) Create(file string) *container {
+	md.mailboxes[file] = &container{filename: file}
+	return md.mailboxes[file]
+}
+
+func (md *mailboxContainer) Remove(file string) error {
+	delete(md.mailboxes, file)
+	return nil
+}
+
+func (md *mailboxContainer) DirectoryInfo(file string) *models.DirectoryInfo {
+	var exists int
+	if md, ok := md.Mailbox(file); ok {
+		exists = len(md.Uids())
+	}
+	return &models.DirectoryInfo{
+		Name:   file,
+		Exists: exists,
+		Recent: 0,
+		Unseen: 0,
+	}
+}
+
+func (md *mailboxContainer) Copy(dest, src string, uids []models.UID) error {
+	srcmbox, ok := md.Mailbox(src)
+	if !ok {
+		return fmt.Errorf("source %s not found", src)
+	}
+	destmbox, ok := md.Mailbox(dest)
+	if !ok {
+		return fmt.Errorf("destination %s not found", dest)
+	}
+	for _, uidSrc := range srcmbox.Uids() {
+		found := false
+		for _, uid := range uids {
+			if uid == uidSrc {
+				found = true
+				break
+			}
+		}
+		if found {
+			msg, err := srcmbox.Message(uidSrc)
+			if err != nil {
+				return fmt.Errorf("could not get message with uid %s from folder %s", uidSrc, src)
+			}
+			r, err := msg.NewReader()
+			if err != nil {
+				return fmt.Errorf("could not get reader for message with uid %s", uidSrc)
+			}
+			flags, err := msg.ModelFlags()
+			if err != nil {
+				return fmt.Errorf("could not get flags for message with uid %s", uidSrc)
+			}
+			err = destmbox.Append(r, flags)
+			if err != nil {
+				return fmt.Errorf("could not append data to mbox: %w", err)
+			}
+		}
+	}
+	md.mailboxes[dest] = destmbox
+	return nil
+}
+
+type container struct {
+	filename string
+	messages []rfc822.RawMessage
+}
+
+func (f *container) Uids() []models.UID {
+	uids := make([]models.UID, len(f.messages))
+	for i, m := range f.messages {
+		uids[i] = m.UID()
+	}
+	return uids
+}
+
+func (f *container) Message(uid models.UID) (rfc822.RawMessage, error) {
+	for _, m := range f.messages {
+		if uid == m.UID() {
+			return m, nil
+		}
+	}
+	return &message{}, fmt.Errorf("uid [%s] not found", uid)
+}
+
+func (f *container) Delete(uids []models.UID) (deleted []models.UID) {
+	newMessages := make([]rfc822.RawMessage, 0)
+	for _, m := range f.messages {
+		del := false
+		for _, uid := range uids {
+			if m.UID() == uid {
+				del = true
+				break
+			}
+		}
+		if del {
+			deleted = append(deleted, m.UID())
+		} else {
+			newMessages = append(newMessages, m)
+		}
+	}
+	f.messages = newMessages
+	return
+}
+
+func (f *container) Append(r io.Reader, flags models.Flags) error {
+	data, err := io.ReadAll(r)
+	if err != nil {
+		return err
+	}
+	f.messages = append(f.messages, &message{
+		uid:     uidFromContents(data),
+		flags:   flags,
+		content: data,
+	})
+	return nil
+}
+
+func uidFromContents(data []byte) models.UID {
+	sum := sha256.New()
+	sum.Write(data)
+	return models.UID(hex.EncodeToString(sum.Sum(nil)))
+}
+
+// message implements the lib.RawMessage interface
+type message struct {
+	uid     models.UID
+	flags   models.Flags
+	content []byte
+}
+
+func (m *message) NewReader() (io.ReadCloser, error) {
+	return io.NopCloser(bytes.NewReader(m.content)), nil
+}
+
+func (m *message) ModelFlags() (models.Flags, error) {
+	return m.flags, nil
+}
+
+func (m *message) Labels() ([]string, error) {
+	return nil, nil
+}
+
+func (m *message) UID() models.UID {
+	return m.uid
+}
+
+func (m *message) SetFlag(flag models.Flags, state bool) error {
+	if state {
+		m.flags |= flag
+	} else {
+		m.flags &^= flag
+	}
+	return nil
+}