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-rw-r--r--commands/account/sort.go85
-rw-r--r--config/config.go1
-rw-r--r--lib/msgstore.go17
-rw-r--r--lib/sort/sort.go56
-rw-r--r--widgets/account.go14
-rw-r--r--worker/lib/sort.go253
-rw-r--r--worker/maildir/worker.go53
-rw-r--r--worker/types/messages.go1
-rw-r--r--worker/types/sort.go19
9 files changed, 491 insertions, 8 deletions
diff --git a/commands/account/sort.go b/commands/account/sort.go
new file mode 100644
index 0000000..6202578
--- /dev/null
+++ b/commands/account/sort.go
@@ -0,0 +1,85 @@
+package account
+
+import (
+	"errors"
+	"strings"
+
+	"git.sr.ht/~sircmpwn/aerc/lib/sort"
+	"git.sr.ht/~sircmpwn/aerc/widgets"
+)
+
+type Sort struct{}
+
+func init() {
+	register(Sort{})
+}
+
+func (Sort) Aliases() []string {
+	return []string{"sort"}
+}
+
+func (Sort) Complete(aerc *widgets.Aerc, args []string) []string {
+	supportedCriteria := []string{
+		"arrival",
+		"cc",
+		"date",
+		"from",
+		"read",
+		"size",
+		"subject",
+		"to",
+	}
+	if len(args) == 0 {
+		return supportedCriteria
+	}
+	last := args[len(args)-1]
+	var completions []string
+	currentPrefix := strings.Join(args, " ") + " "
+	// if there is a completed criteria then suggest all again or an option
+	for _, criteria := range append(supportedCriteria, "-r") {
+		if criteria == last {
+			for _, criteria := range supportedCriteria {
+				completions = append(completions, currentPrefix+criteria)
+			}
+			return completions
+		}
+	}
+
+	currentPrefix = strings.Join(args[:len(args)-1], " ")
+	if len(args) > 1 {
+		currentPrefix += " "
+	}
+	// last was beginning an option
+	if last == "-" {
+		return []string{currentPrefix + "-r"}
+	}
+	// the last item is not complete
+	for _, criteria := range supportedCriteria {
+		if strings.HasPrefix(criteria, last) {
+			completions = append(completions, currentPrefix+criteria)
+		}
+	}
+	return completions
+}
+
+func (Sort) Execute(aerc *widgets.Aerc, args []string) error {
+	acct := aerc.SelectedAccount()
+	if acct == nil {
+		return errors.New("No account selected.")
+	}
+	store := acct.Store()
+	if store == nil {
+		return errors.New("Messages still loading.")
+	}
+
+	sortCriteria, err := sort.GetSortCriteria(args[1:])
+	if err != nil {
+		return err
+	}
+
+	aerc.SetStatus("Sorting")
+	store.Sort(sortCriteria, func() {
+		aerc.SetStatus("Sorting complete")
+	})
+	return nil
+}
diff --git a/config/config.go b/config/config.go
index eeaf937..5a41903 100644
--- a/config/config.go
+++ b/config/config.go
@@ -36,6 +36,7 @@ type UIConfig struct {
 	Spinner           string   `ini:"spinner"`
 	SpinnerDelimiter  string   `ini:"spinner-delimiter"`
 	DirListFormat     string   `ini:"dirlist-format"`
+	Sort              []string `delim:" "`
 }
 
 const (
diff --git a/lib/msgstore.go b/lib/msgstore.go
index 1f18fbf..b0392ba 100644
--- a/lib/msgstore.go
+++ b/lib/msgstore.go
@@ -25,6 +25,8 @@ type MessageStore struct {
 	resultIndex int
 	filter      bool
 
+	defaultSortCriteria []*types.SortCriterion
+
 	// Map of uids we've asked the worker to fetch
 	onUpdate       func(store *MessageStore) // TODO: multiple onUpdate handlers
 	onUpdateDirs   func()
@@ -38,6 +40,7 @@ type MessageStore struct {
 
 func NewMessageStore(worker *types.Worker,
 	dirInfo *models.DirectoryInfo,
+	defaultSortCriteria []*types.SortCriterion,
 	triggerNewEmail func(*models.MessageInfo),
 	triggerDirectoryChange func()) *MessageStore {
 
@@ -49,6 +52,8 @@ func NewMessageStore(worker *types.Worker,
 		bodyCallbacks:   make(map[uint32][]func(io.Reader)),
 		headerCallbacks: make(map[uint32][]func(*types.MessageInfo)),
 
+		defaultSortCriteria: defaultSortCriteria,
+
 		pendingBodies:  make(map[uint32]interface{}),
 		pendingHeaders: make(map[uint32]interface{}),
 		worker:         worker,
@@ -151,7 +156,9 @@ func (store *MessageStore) Update(msg types.WorkerMessage) {
 	switch msg := msg.(type) {
 	case *types.DirectoryInfo:
 		store.DirInfo = *msg.Info
-		store.worker.PostAction(&types.FetchDirectoryContents{}, nil)
+		store.worker.PostAction(&types.FetchDirectoryContents{
+			SortCriteria: store.defaultSortCriteria,
+		}, nil)
 		update = true
 	case *types.DirectoryContents:
 		newMap := make(map[uint32]*models.MessageInfo)
@@ -434,3 +441,11 @@ func (store *MessageStore) ModifyLabels(uids []uint32, add, remove []string,
 		Remove: remove,
 	}, cb)
 }
+
+func (store *MessageStore) Sort(criteria []*types.SortCriterion, cb func()) {
+	store.worker.PostAction(&types.FetchDirectoryContents{
+		SortCriteria: criteria,
+	}, func(msg types.WorkerMessage) {
+		cb()
+	})
+}
diff --git a/lib/sort/sort.go b/lib/sort/sort.go
new file mode 100644
index 0000000..89c36a9
--- /dev/null
+++ b/lib/sort/sort.go
@@ -0,0 +1,56 @@
+package sort
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"git.sr.ht/~sircmpwn/aerc/worker/types"
+)
+
+func GetSortCriteria(args []string) ([]*types.SortCriterion, error) {
+	var sortCriteria []*types.SortCriterion
+	reverse := false
+	for _, arg := range args {
+		if arg == "-r" {
+			reverse = true
+			continue
+		}
+		field, err := parseSortField(arg)
+		if err != nil {
+			return nil, err
+		}
+		sortCriteria = append(sortCriteria, &types.SortCriterion{
+			Field:   field,
+			Reverse: reverse,
+		})
+		reverse = false
+	}
+	if reverse {
+		return nil, errors.New("Expected argument to reverse")
+	}
+	return sortCriteria, nil
+}
+
+func parseSortField(arg string) (types.SortField, error) {
+	switch strings.ToLower(arg) {
+	case "arrival":
+		return types.SortArrival, nil
+	case "cc":
+		return types.SortCc, nil
+	case "date":
+		return types.SortDate, nil
+	case "from":
+		return types.SortFrom, nil
+	case "read":
+		return types.SortRead, nil
+	case "size":
+		return types.SortSize, nil
+	case "subject":
+		return types.SortSubject, nil
+	case "to":
+		return types.SortTo, nil
+	default:
+		return types.SortArrival, fmt.Errorf("%v is not a valid sort criterion", arg)
+	}
+}
diff --git a/widgets/account.go b/widgets/account.go
index eb6a495..4e8dd17 100644
--- a/widgets/account.go
+++ b/widgets/account.go
@@ -9,6 +9,7 @@ import (
 
 	"git.sr.ht/~sircmpwn/aerc/config"
 	"git.sr.ht/~sircmpwn/aerc/lib"
+	"git.sr.ht/~sircmpwn/aerc/lib/sort"
 	"git.sr.ht/~sircmpwn/aerc/lib/ui"
 	"git.sr.ht/~sircmpwn/aerc/models"
 	"git.sr.ht/~sircmpwn/aerc/worker"
@@ -218,6 +219,7 @@ func (acct *AccountView) onMessage(msg types.WorkerMessage) {
 			store.Update(msg)
 		} else {
 			store = lib.NewMessageStore(acct.worker, msg.Info,
+				acct.getSortCriteria(),
 				func(msg *models.MessageInfo) {
 					acct.conf.Triggers.ExecNewEmail(acct.acct,
 						acct.conf, msg)
@@ -254,3 +256,15 @@ func (acct *AccountView) onMessage(msg types.WorkerMessage) {
 			Color(tcell.ColorDefault, tcell.ColorRed)
 	}
 }
+
+func (acct *AccountView) getSortCriteria() []*types.SortCriterion {
+	if len(acct.conf.Ui.Sort) == 0 {
+		return nil
+	}
+	criteria, err := sort.GetSortCriteria(acct.conf.Ui.Sort)
+	if err != nil {
+		acct.aerc.PushError(" ui.sort: " + err.Error())
+		return nil
+	}
+	return criteria
+}
diff --git a/worker/lib/sort.go b/worker/lib/sort.go
new file mode 100644
index 0000000..36c0924
--- /dev/null
+++ b/worker/lib/sort.go
@@ -0,0 +1,253 @@
+package lib
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+	"time"
+
+	"git.sr.ht/~sircmpwn/aerc/models"
+	"git.sr.ht/~sircmpwn/aerc/worker/types"
+)
+
+func Sort(messageInfos []*models.MessageInfo,
+	criteria []*types.SortCriterion) ([]uint32, error) {
+	// loop through in reverse to ensure we sort by non-primary fields first
+	for i := len(criteria) - 1; i >= 0; i-- {
+		criterion := criteria[i]
+		var err error
+		switch criterion.Field {
+		case types.SortArrival:
+			err = sortDate(messageInfos, criterion,
+				func(msgInfo *models.MessageInfo) time.Time {
+					return msgInfo.InternalDate
+				})
+		case types.SortCc:
+			err = sortAddresses(messageInfos, criterion,
+				func(msgInfo *models.MessageInfo) []*models.Address {
+					return msgInfo.Envelope.Cc
+				})
+		case types.SortDate:
+			err = sortDate(messageInfos, criterion,
+				func(msgInfo *models.MessageInfo) time.Time {
+					return msgInfo.Envelope.Date
+				})
+		case types.SortFrom:
+			err = sortAddresses(messageInfos, criterion,
+				func(msgInfo *models.MessageInfo) []*models.Address {
+					return msgInfo.Envelope.From
+				})
+		case types.SortRead:
+			err = sortFlags(messageInfos, criterion, models.SeenFlag)
+		case types.SortSize:
+			err = sortInts(messageInfos, criterion,
+				func(msgInfo *models.MessageInfo) uint32 {
+					return msgInfo.Size
+				})
+		case types.SortSubject:
+			err = sortStrings(messageInfos, criterion,
+				func(msgInfo *models.MessageInfo) string {
+					subject := strings.ToLower(msgInfo.Envelope.Subject)
+					subject = strings.TrimPrefix(subject, "re: ")
+					return strings.TrimPrefix(subject, "fwd: ")
+				})
+		case types.SortTo:
+			err = sortAddresses(messageInfos, criterion,
+				func(msgInfo *models.MessageInfo) []*models.Address {
+					return msgInfo.Envelope.To
+				})
+		}
+		if err != nil {
+			return nil, err
+		}
+	}
+	var uids []uint32
+	// copy in reverse as msgList displays backwards
+	for i := len(messageInfos) - 1; i >= 0; i-- {
+		uids = append(uids, messageInfos[i].Uid)
+	}
+	return uids, nil
+}
+
+func sortDate(messageInfos []*models.MessageInfo, criterion *types.SortCriterion,
+	getValue func(*models.MessageInfo) time.Time) error {
+	var slice []*dateStore
+	for _, msgInfo := range messageInfos {
+		slice = append(slice, &dateStore{
+			Value:   getValue(msgInfo),
+			MsgInfo: msgInfo,
+		})
+	}
+	sortSlice(criterion, dateSlice{slice})
+	for i := 0; i < len(messageInfos); i++ {
+		messageInfos[i] = slice[i].MsgInfo
+	}
+	return nil
+}
+
+func sortAddresses(messageInfos []*models.MessageInfo, criterion *types.SortCriterion,
+	getValue func(*models.MessageInfo) []*models.Address) error {
+	var slice []*addressStore
+	for _, msgInfo := range messageInfos {
+		slice = append(slice, &addressStore{
+			Value:   getValue(msgInfo),
+			MsgInfo: msgInfo,
+		})
+	}
+	sortSlice(criterion, addressSlice{slice})
+	for i := 0; i < len(messageInfos); i++ {
+		messageInfos[i] = slice[i].MsgInfo
+	}
+	return nil
+}
+
+func sortFlags(messageInfos []*models.MessageInfo, criterion *types.SortCriterion,
+	testFlag models.Flag) error {
+	var slice []*boolStore
+	for _, msgInfo := range messageInfos {
+		flagPresent := false
+		for _, flag := range msgInfo.Flags {
+			if flag == testFlag {
+				flagPresent = true
+			}
+		}
+		slice = append(slice, &boolStore{
+			Value:   flagPresent,
+			MsgInfo: msgInfo,
+		})
+	}
+	sortSlice(criterion, boolSlice{slice})
+	for i := 0; i < len(messageInfos); i++ {
+		messageInfos[i] = slice[i].MsgInfo
+	}
+	return nil
+}
+
+func sortInts(messageInfos []*models.MessageInfo, criterion *types.SortCriterion,
+	getValue func(*models.MessageInfo) uint32) error {
+	var slice []*intStore
+	for _, msgInfo := range messageInfos {
+		slice = append(slice, &intStore{
+			Value:   getValue(msgInfo),
+			MsgInfo: msgInfo,
+		})
+	}
+	sortSlice(criterion, intSlice{slice})
+	for i := 0; i < len(messageInfos); i++ {
+		messageInfos[i] = slice[i].MsgInfo
+	}
+	return nil
+}
+
+func sortStrings(messageInfos []*models.MessageInfo, criterion *types.SortCriterion,
+	getValue func(*models.MessageInfo) string) error {
+	var slice []*lexiStore
+	for _, msgInfo := range messageInfos {
+		slice = append(slice, &lexiStore{
+			Value:   getValue(msgInfo),
+			MsgInfo: msgInfo,
+		})
+	}
+	sortSlice(criterion, lexiSlice{slice})
+	for i := 0; i < len(messageInfos); i++ {
+		messageInfos[i] = slice[i].MsgInfo
+	}
+	return nil
+}
+
+type lexiStore struct {
+	Value   string
+	MsgInfo *models.MessageInfo
+}
+
+type lexiSlice struct{ Slice []*lexiStore }
+
+func (s lexiSlice) Len() int      { return len(s.Slice) }
+func (s lexiSlice) Swap(i, j int) { s.Slice[i], s.Slice[j] = s.Slice[j], s.Slice[i] }
+func (s lexiSlice) Less(i, j int) bool {
+	return s.Slice[i].Value < s.Slice[j].Value
+}
+
+type dateStore struct {
+	Value   time.Time
+	MsgInfo *models.MessageInfo
+}
+
+type dateSlice struct{ Slice []*dateStore }
+
+func (s dateSlice) Len() int      { return len(s.Slice) }
+func (s dateSlice) Swap(i, j int) { s.Slice[i], s.Slice[j] = s.Slice[j], s.Slice[i] }
+func (s dateSlice) Less(i, j int) bool {
+	return s.Slice[i].Value.Before(s.Slice[j].Value)
+}
+
+type intStore struct {
+	Value   uint32
+	MsgInfo *models.MessageInfo
+}
+
+type intSlice struct{ Slice []*intStore }
+
+func (s intSlice) Len() int      { return len(s.Slice) }
+func (s intSlice) Swap(i, j int) { s.Slice[i], s.Slice[j] = s.Slice[j], s.Slice[i] }
+func (s intSlice) Less(i, j int) bool {
+	return s.Slice[i].Value < s.Slice[j].Value
+}
+
+type addressStore struct {
+	Value   []*models.Address
+	MsgInfo *models.MessageInfo
+}
+
+type addressSlice struct{ Slice []*addressStore }
+
+func (s addressSlice) Len() int      { return len(s.Slice) }
+func (s addressSlice) Swap(i, j int) { s.Slice[i], s.Slice[j] = s.Slice[j], s.Slice[i] }
+func (s addressSlice) Less(i, j int) bool {
+	addressI, addressJ := s.Slice[i].Value, s.Slice[j].Value
+	var firstI, firstJ *models.Address
+	if len(addressI) > 0 {
+		firstI = addressI[0]
+	}
+	if len(addressJ) > 0 {
+		firstJ = addressJ[0]
+	}
+	if firstI == nil && firstJ == nil {
+		return false
+	} else if firstI == nil && firstJ != nil {
+		return false
+	} else if firstI != nil && firstJ == nil {
+		return true
+	} else /* firstI != nil && firstJ != nil */ {
+		getName := func(addr *models.Address) string {
+			if addr.Name != "" {
+				return addr.Name
+			} else {
+				return fmt.Sprintf("%s@%s", addr.Mailbox, addr.Host)
+			}
+		}
+		return getName(firstI) < getName(firstJ)
+	}
+}
+
+type boolStore struct {
+	Value   bool
+	MsgInfo *models.MessageInfo
+}
+
+type boolSlice struct{ Slice []*boolStore }
+
+func (s boolSlice) Len() int      { return len(s.Slice) }
+func (s boolSlice) Swap(i, j int) { s.Slice[i], s.Slice[j] = s.Slice[j], s.Slice[i] }
+func (s boolSlice) Less(i, j int) bool {
+	valI, valJ := s.Slice[i].Value, s.Slice[j].Value
+	return valI && !valJ
+}
+
+func sortSlice(criterion *types.SortCriterion, interfce sort.Interface) {
+	if criterion.Reverse {
+		sort.Stable(sort.Reverse(interfce))
+	} else {
+		sort.Stable(interfce)
+	}
+}
diff --git a/worker/maildir/worker.go b/worker/maildir/worker.go
index 597e0d2..1df4e09 100644
--- a/worker/maildir/worker.go
+++ b/worker/maildir/worker.go
@@ -12,6 +12,7 @@ import (
 
 	"git.sr.ht/~sircmpwn/aerc/models"
 	"git.sr.ht/~sircmpwn/aerc/worker/handlers"
+	"git.sr.ht/~sircmpwn/aerc/worker/lib"
 	"git.sr.ht/~sircmpwn/aerc/worker/types"
 )
 
@@ -23,11 +24,12 @@ var errUnsupported = fmt.Errorf("unsupported command")
 
 // A Worker handles interfacing between aerc's UI and a group of maildirs.
 type Worker struct {
-	c            *Container
-	selected     *maildir.Dir
-	selectedName string
-	worker       *types.Worker
-	watcher      *fsnotify.Watcher
+	c                   *Container
+	selected            *maildir.Dir
+	selectedName        string
+	worker              *types.Worker
+	watcher             *fsnotify.Watcher
+	currentSortCriteria []*types.SortCriterion
 }
 
 // NewWorker creates a new maildir worker with the provided worker.
@@ -86,8 +88,13 @@ func (w *Worker) handleFSEvent(ev fsnotify.Event) {
 		w.worker.Logger.Printf("could not scan UIDs: %v", err)
 		return
 	}
+	sortedUids, err := w.sort(uids, w.currentSortCriteria)
+	if err != nil {
+		w.worker.Logger.Printf("error sorting directory: %v", err)
+		return
+	}
 	w.worker.PostMessage(&types.DirectoryContents{
-		Uids: uids,
+		Uids: sortedUids,
 	}, nil)
 	dirInfo := w.getDirectoryInfo()
 	dirInfo.Recent = len(newUnseen)
@@ -271,13 +278,45 @@ func (w *Worker) handleFetchDirectoryContents(
 		w.worker.Logger.Printf("error scanning uids: %v", err)
 		return err
 	}
+	sortedUids, err := w.sort(uids, msg.SortCriteria)
+	if err != nil {
+		w.worker.Logger.Printf("error sorting directory: %v", err)
+		return err
+	}
+	w.currentSortCriteria = msg.SortCriteria
 	w.worker.PostMessage(&types.DirectoryContents{
 		Message: types.RespondTo(msg),
-		Uids:    uids,
+		Uids:    sortedUids,
 	}, nil)
 	return nil
 }
 
+func (w *Worker) sort(uids []uint32, criteria []*types.SortCriterion) ([]uint32, error) {
+	if len(criteria) == 0 {
+		return uids, nil
+	}
+	var msgInfos []*models.MessageInfo
+	for _, uid := range uids {
+		m, err := w.c.Message(*w.selected, uid)
+		if err != nil {
+			w.worker.Logger.Printf("could not get message: %v", err)
+			continue
+		}
+		info, err := m.MessageInfo()
+		if err != nil {
+			w.worker.Logger.Printf("could not get message info: %v", err)
+			continue
+		}
+		msgInfos = append(msgInfos, info)
+	}
+	sortedUids, err := lib.Sort(msgInfos, criteria)
+	if err != nil {
+		w.worker.Logger.Printf("could not sort the messages: %v", err)
+		return nil, err
+	}
+	return sortedUids, nil
+}
+
 func (w *Worker) handleCreateDirectory(msg *types.CreateDirectory) error {
 	dir := w.c.Dir(msg.Directory)
 	if err := dir.Create(); err != nil {
diff --git a/worker/types/messages.go b/worker/types/messages.go
index 9f40b8f..3539139 100644
--- a/worker/types/messages.go
+++ b/worker/types/messages.go
@@ -78,6 +78,7 @@ type OpenDirectory struct {
 
 type FetchDirectoryContents struct {
 	Message
+	SortCriteria []*SortCriterion
 }
 
 type SearchDirectory struct {
diff --git a/worker/types/sort.go b/worker/types/sort.go
new file mode 100644
index 0000000..ffbcf46
--- /dev/null
+++ b/worker/types/sort.go
@@ -0,0 +1,19 @@
+package types
+
+type SortField int
+
+const (
+	SortArrival SortField = iota
+	SortCc
+	SortDate
+	SortFrom
+	SortRead
+	SortSize
+	SortSubject
+	SortTo
+)
+
+type SortCriterion struct {
+	Field   SortField
+	Reverse bool
+}