Add device list and legacy verification commands

4 files changed, 368 insertions, 92 deletions

diff --git a/ui/command-processor.go b/ui/command-processor.go
index b8f41a2..1b30cbe 100644
--- a/ui/command-processor.go
+++ b/ui/command-processor.go
@@ -20,6 +20,8 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/mattn/go-runewidth"
+
 	"maunium.net/go/gomuks/config"
 	"maunium.net/go/gomuks/debug"
 	"maunium.net/go/gomuks/interface"
@@ -45,6 +47,8 @@ type Command struct {
 	OrigText    string
 }
 
+type CommandAutocomplete Command
+
 func (cmd *Command) Reply(message string, args ...interface{}) {
 	cmd.Room.AddServiceMessage(fmt.Sprintf(message, args...))
 	cmd.UI.Render()
@@ -60,12 +64,15 @@ func (alias *Alias) Process(cmd *Command) *Command {
 }
 
 type CommandHandler func(cmd *Command)
+type CommandAutocompleter func(cmd *CommandAutocomplete) (completions []string, newText string)
 
 type CommandProcessor struct {
 	gomuksPointerContainer
 
 	aliases  map[string]*Alias
 	commands map[string]CommandHandler
+
+	autocompleters map[string]CommandAutocompleter
 }
 
 func NewCommandProcessor(parent *MainView) *CommandProcessor {
@@ -97,6 +104,12 @@ func NewCommandProcessor(parent *MainView) *CommandProcessor {
 			"dl":         {"download"},
 			"o":          {"open"},
 		},
+		autocompleters: map[string]CommandAutocompleter{
+			"devices":  autocompleteDevice,
+			"device":   autocompleteDevice,
+			"verify":   autocompleteDevice,
+			"unverify": autocompleteDevice,
+		},
 		commands: map[string]CommandHandler{
 			"unknown-command": cmdUnknownCommand,
 
@@ -140,6 +153,11 @@ func NewCommandProcessor(parent *MainView) *CommandProcessor {
 			"trace":      cmdTrace,
 
 			"fingerprint": cmdFingerprint,
+			"devices":     cmdDevices,
+			"verify":      cmdVerify,
+			"device":      cmdDevice,
+			"unverify":    cmdUnverify,
+			"blacklist":   cmdBlacklist,
 		},
 	}
 }
@@ -169,6 +187,47 @@ func (ch *CommandProcessor) ParseCommand(roomView *RoomView, text string) *Comma
 	}
 }
 
+func (ch *CommandProcessor) Autocomplete(roomView *RoomView, text string, cursorOffset int) ([]string, string, bool) {
+	var completions []string
+	if cmd := (*CommandAutocomplete)(ch.ParseCommand(roomView, text)); cmd == nil {
+		return completions, text, false
+	} else if handler, ok := ch.autocompleters[cmd.Command]; !ok {
+		return completions, text, false
+	} else if cursorOffset != runewidth.StringWidth(text) {
+		return completions, text, false
+	} else {
+		completions, newText := handler(cmd)
+		if newText == "" {
+			newText = text
+		}
+		return completions, newText, true
+	}
+}
+
+func (ch *CommandProcessor) AutocompleteCommand(word string) (completions []string) {
+	if word[0] != '/' {
+		return
+	}
+	word = word[1:]
+	for alias := range ch.aliases {
+		if alias == word {
+			return []string{"/" + alias}
+		}
+		if strings.HasPrefix(alias, word) {
+			completions = append(completions, "/"+alias)
+		}
+	}
+	for command := range ch.commands {
+		if command == word {
+			return []string{"/" + command}
+		}
+		if strings.HasPrefix(command, word) {
+			completions = append(completions, "/"+command)
+		}
+	}
+	return
+}
+
 func (ch *CommandProcessor) HandleCommand(cmd *Command) {
 	defer debug.Recover()
 	if cmd == nil {
diff --git a/ui/commands.go b/ui/commands.go
index 49bff0f..b406278 100644
--- a/ui/commands.go
+++ b/ui/commands.go
@@ -37,6 +37,7 @@ import (
 	"github.com/russross/blackfriday/v2"
 
 	"maunium.net/go/mautrix"
+	"maunium.net/go/mautrix/crypto"
 	"maunium.net/go/mautrix/event"
 	"maunium.net/go/mautrix/format"
 	"maunium.net/go/mautrix/id"
@@ -365,6 +366,187 @@ func cmdFingerprint(cmd *Command) {
 	}
 }
 
+// region TODO these four functions currently use the crypto internals directly. switch to interfaces before releasing
+
+func autocompleteDeviceUserID(cmd *CommandAutocomplete) (completions []string, newText string) {
+	userCompletions := cmd.Room.AutocompleteUser(cmd.Args[0])
+	if len(userCompletions) == 1 {
+		newText = fmt.Sprintf("/%s %s ", cmd.OrigCommand, userCompletions[0].id)
+	} else {
+		completions = make([]string, len(userCompletions))
+		for i, completion := range userCompletions {
+			completions[i] = completion.id
+		}
+	}
+	return
+}
+
+func autocompleteDeviceDeviceID(cmd *CommandAutocomplete) (completions []string, newText string) {
+	mach := cmd.Matrix.Crypto().(*crypto.OlmMachine)
+	devices, err := mach.CryptoStore.GetDevices(id.UserID(cmd.Args[0]))
+	if len(devices) == 0 || err != nil {
+		return
+	}
+	var completedDeviceID id.DeviceID
+	if len(cmd.Args) > 1 {
+		existingID := strings.ToUpper(cmd.Args[1])
+		for _, device := range devices {
+			deviceIDStr := string(device.DeviceID)
+			if deviceIDStr == existingID {
+				// We don't want to do any autocompletion if there's already a full device ID there.
+				return []string{}, ""
+			} else if strings.HasPrefix(strings.ToUpper(device.Name), existingID) || strings.HasPrefix(deviceIDStr, existingID) {
+				completedDeviceID = device.DeviceID
+				completions = append(completions, fmt.Sprintf("%s (%s)", device.DeviceID, device.Name))
+			}
+		}
+	} else {
+		completions = make([]string, len(devices))
+		i := 0
+		for _, device := range devices {
+			completedDeviceID = device.DeviceID
+			completions[i] = fmt.Sprintf("%s (%s)", device.DeviceID, device.Name)
+			i++
+		}
+	}
+	if len(completions) == 1 {
+		newText = fmt.Sprintf("/%s %s %s ", cmd.OrigCommand, cmd.Args[0], completedDeviceID)
+	}
+	return
+}
+
+func autocompleteDevice(cmd *CommandAutocomplete) ([]string, string) {
+	if len(cmd.Args) == 0 {
+		return []string{}, ""
+	} else if len(cmd.Args) == 1 && !unicode.IsSpace(rune(cmd.RawArgs[len(cmd.RawArgs)-1])) {
+		return autocompleteDeviceUserID(cmd)
+	} else if cmd.Command != "devices" {
+		return autocompleteDeviceDeviceID(cmd)
+	}
+	return []string{}, ""
+}
+
+func getDevice(cmd *Command) *crypto.DeviceIdentity {
+	if len(cmd.Args) < 2 {
+		cmd.Reply("Usage: /%s <user id> <device id> [fingerprint]", cmd.Command)
+		return nil
+	}
+	mach := cmd.Matrix.Crypto().(*crypto.OlmMachine)
+	device, err := mach.GetOrFetchDevice(id.UserID(cmd.Args[0]), id.DeviceID(cmd.Args[1]))
+	if err != nil {
+		cmd.Reply("Failed to get device: %v", err)
+		return nil
+	}
+	return device
+}
+
+func putDevice(cmd *Command, device *crypto.DeviceIdentity, action string) {
+	mach := cmd.Matrix.Crypto().(*crypto.OlmMachine)
+	err := mach.CryptoStore.PutDevice(device.UserID, device)
+	if err != nil {
+		cmd.Reply("Failed to save device: %v", err)
+	} else {
+		cmd.Reply("Successfully %s %s/%s (%s)", action, device.UserID, device.DeviceID, device.Name)
+	}
+	mach.OnDevicesChanged(device.UserID)
+}
+
+func cmdDevices(cmd *Command) {
+	if len(cmd.Args) == 0 {
+		cmd.Reply("Usage: /devices <user id>")
+		return
+	}
+	userID := id.UserID(cmd.Args[0])
+	mach := cmd.Matrix.Crypto().(*crypto.OlmMachine)
+	devices, err := mach.CryptoStore.GetDevices(userID)
+	if err != nil {
+		cmd.Reply("Failed to get device list: %v", err)
+	}
+	if len(devices) == 0 {
+		cmd.Reply("Fetching device list from server...")
+		devices = mach.LoadDevices(userID)
+	}
+	if len(devices) == 0 {
+		cmd.Reply("No devices found for %s", userID)
+		return
+	}
+	var buf strings.Builder
+	for _, device := range devices {
+		_, _ = fmt.Fprintf(&buf, "%s (%s) - %s - %s\n", device.DeviceID, device.Name, device.Trust.String(), device.Fingerprint())
+	}
+	resp := buf.String()
+	cmd.Reply(resp[:len(resp)-1])
+}
+
+func cmdDevice(cmd *Command) {
+	device := getDevice(cmd)
+	if device == nil {
+		return
+	}
+	deviceType := "Device"
+	if device.Deleted {
+		deviceType = "Deleted device"
+	}
+	cmd.Reply("%s %s of %s\nFingerprint: %s\nIdentity key: %s\nDevice name: %s\nTrust state: %s",
+		deviceType, device.DeviceID, device.UserID,
+		device.Fingerprint(), device.IdentityKey,
+		device.Name, device.Trust.String())
+}
+
+func cmdVerify(cmd *Command) {
+	device := getDevice(cmd)
+	if device == nil {
+		return
+	}
+	if len(cmd.Args) == 2 {
+		cmd.Reply("Interactive verification UI is not yet implemented")
+	} else {
+		fingerprint := strings.Join(cmd.Args[2:], "")
+		if string(device.SigningKey) != fingerprint {
+			cmd.Reply("Mismatching fingerprint")
+			return
+		}
+		action := "verified"
+		if device.Trust == crypto.TrustStateBlacklisted {
+			action = "unblacklisted and verified"
+		}
+		device.Trust = crypto.TrustStateVerified
+		putDevice(cmd, device, action)
+	}
+}
+
+func cmdUnverify(cmd *Command) {
+	device := getDevice(cmd)
+	if device == nil {
+		return
+	}
+	if device.Trust == crypto.TrustStateUnset {
+		cmd.Reply("That device is already not verified")
+		return
+	}
+	action := "unverified"
+	if device.Trust == crypto.TrustStateBlacklisted {
+		action = "unblacklisted"
+	}
+	device.Trust = crypto.TrustStateUnset
+	putDevice(cmd, device, action)
+}
+
+func cmdBlacklist(cmd *Command) {
+	device := getDevice(cmd)
+	if device == nil {
+		return
+	}
+	action := "blacklisted"
+	if device.Trust == crypto.TrustStateVerified {
+		action = "unverified and blacklisted"
+	}
+	device.Trust = crypto.TrustStateBlacklisted
+	putDevice(cmd, device, action)
+}
+
+// endregion
+
 func cmdHeapProfile(cmd *Command) {
 	if len(cmd.Args) == 0 || cmd.Args[0] != "nogc" {
 		runtime.GC()
@@ -449,7 +631,18 @@ Things: rooms, users, baremessages, images, typingnotif
 /rainbowme <message> - Send rainbow text in an emote.
 /reply [text]        - Reply to the selected message.
 /react <reaction>    - React to the selected message.
-/redact [reason]    - Redact the selected message.
+/redact [reason]     - Redact the selected message.
+
+# Encryption
+/fingerprint - View the fingerprint of your device.
+
+/devices <user id>               - View the device list of a user.
+/device <user id> <device id>    - Show info about a specific device.
+/unverify <user id> <device id>  - Un-verify a device.
+/blacklist <user id> <device id> - Blacklist a device.
+/verify <user id> <device id> [fingerprint]
+    - Verify a device. If the fingerprint is not provided,
+      interactive emoji verification will be started.
 
 # Rooms
 /pm <user id> <...>   - Create a private chat with the given user(s).
diff --git a/ui/room-view.go b/ui/room-view.go
index dbdaccc..38a561c 100644
--- a/ui/room-view.go
+++ b/ui/room-view.go
@@ -22,15 +22,18 @@ import (
 	"sort"
 	"strings"
 	"time"
+	"unicode"
 
 	"github.com/kyokomi/emoji"
 	"github.com/mattn/go-runewidth"
 	"github.com/zyedidia/clipboard"
 
-	"maunium.net/go/mautrix/crypto/attachment"
 	"maunium.net/go/mauview"
 	"maunium.net/go/tcell"
 
+	"maunium.net/go/gomuks/lib/util"
+	"maunium.net/go/mautrix/crypto/attachment"
+
 	"maunium.net/go/mautrix"
 	"maunium.net/go/mautrix/event"
 	"maunium.net/go/mautrix/id"
@@ -39,7 +42,6 @@ import (
 	"maunium.net/go/gomuks/debug"
 	"maunium.net/go/gomuks/interface"
 	"maunium.net/go/gomuks/lib/open"
-	"maunium.net/go/gomuks/lib/util"
 	"maunium.net/go/gomuks/matrix/muksevt"
 	"maunium.net/go/gomuks/matrix/rooms"
 	"maunium.net/go/gomuks/ui/messages"
@@ -420,65 +422,6 @@ func (view *RoomView) SetTyping(users []id.UserID) {
 	}
 }
 
-type completion struct {
-	displayName string
-	id          string
-}
-
-func (view *RoomView) autocompleteUser(existingText string) (completions []completion) {
-	textWithoutPrefix := strings.TrimPrefix(existingText, "@")
-	for userID, user := range view.Room.GetMembers() {
-		if user.Displayname == textWithoutPrefix || string(userID) == existingText {
-			// Exact match, return that.
-			return []completion{{user.Displayname, string(userID)}}
-		}
-
-		if strings.HasPrefix(user.Displayname, textWithoutPrefix) || strings.HasPrefix(string(userID), existingText) {
-			completions = append(completions, completion{user.Displayname, string(userID)})
-		}
-	}
-	return
-}
-
-func (view *RoomView) autocompleteRoom(existingText string) (completions []completion) {
-	for _, room := range view.parent.rooms {
-		alias := string(room.Room.GetCanonicalAlias())
-		if alias == existingText {
-			// Exact match, return that.
-			return []completion{{alias, string(room.Room.ID)}}
-		}
-		if strings.HasPrefix(alias, existingText) {
-			completions = append(completions, completion{alias, string(room.Room.ID)})
-			continue
-		}
-	}
-	return
-}
-
-func (view *RoomView) autocompleteEmoji(word string) (completions []string) {
-	if len(word) == 0 || word[0] != ':' {
-		return
-	}
-	var valueCompletion1 string
-	var manyValues bool
-	for name, value := range emoji.CodeMap() {
-		if name == word {
-			return []string{value}
-		} else if strings.HasPrefix(name, word) {
-			completions = append(completions, name)
-			if valueCompletion1 == "" {
-				valueCompletion1 = value
-			} else if valueCompletion1 != value {
-				manyValues = true
-			}
-		}
-	}
-	if !manyValues && len(completions) > 0 {
-		return []string{emoji.CodeMap()[completions[0]]}
-	}
-	return
-}
-
 func (view *RoomView) SetEditing(evt *muksevt.Event) {
 	if evt == nil {
 		view.editing = nil
@@ -584,23 +527,90 @@ func (view *RoomView) SelectPrevious() {
 	}
 }
 
-func (view *RoomView) InputTabComplete(text string, cursorOffset int) {
-	debug.Print("Tab completing", cursorOffset, text)
-	str := runewidth.Truncate(text, cursorOffset, "")
-	word := findWordToTabComplete(str)
-	startIndex := len(str) - len(word)
+type completion struct {
+	displayName string
+	id          string
+}
 
-	var strCompletions []string
-	var strCompletion string
+func (view *RoomView) AutocompleteUser(existingText string) (completions []completion) {
+	textWithoutPrefix := strings.TrimPrefix(existingText, "@")
+	for userID, user := range view.Room.GetMembers() {
+		if user.Displayname == textWithoutPrefix || string(userID) == existingText {
+			// Exact match, return that.
+			return []completion{{user.Displayname, string(userID)}}
+		}
 
-	completions := view.autocompleteUser(word)
-	completions = append(completions, view.autocompleteRoom(word)...)
+		if strings.HasPrefix(user.Displayname, textWithoutPrefix) || strings.HasPrefix(string(userID), existingText) {
+			completions = append(completions, completion{user.Displayname, string(userID)})
+		}
+	}
+	return
+}
+
+func (view *RoomView) AutocompleteRoom(existingText string) (completions []completion) {
+	for _, room := range view.parent.rooms {
+		alias := string(room.Room.GetCanonicalAlias())
+		if alias == existingText {
+			// Exact match, return that.
+			return []completion{{alias, string(room.Room.ID)}}
+		}
+		if strings.HasPrefix(alias, existingText) {
+			completions = append(completions, completion{alias, string(room.Room.ID)})
+			continue
+		}
+	}
+	return
+}
+
+func (view *RoomView) AutocompleteEmoji(word string) (completions []string) {
+	if word[0] != ':' {
+		return
+	}
+	var valueCompletion1 string
+	var manyValues bool
+	for name, value := range emoji.CodeMap() {
+		if name == word {
+			return []string{value}
+		} else if strings.HasPrefix(name, word) {
+			completions = append(completions, name)
+			if valueCompletion1 == "" {
+				valueCompletion1 = value
+			} else if valueCompletion1 != value {
+				manyValues = true
+			}
+		}
+	}
+	if !manyValues && len(completions) > 0 {
+		return []string{emoji.CodeMap()[completions[0]]}
+	}
+	return
+}
+
+func findWordToTabComplete(text string) string {
+	output := ""
+	runes := []rune(text)
+	for i := len(runes) - 1; i >= 0; i-- {
+		if unicode.IsSpace(runes[i]) {
+			break
+		}
+		output = string(runes[i]) + output
+	}
+	return output
+}
+
+func (view *RoomView) defaultAutocomplete(word string, startIndex int) (strCompletions []string, strCompletion string) {
+	if len(word) == 0 {
+		return []string{}, ""
+	}
+
+	completions := view.AutocompleteUser(word)
+	completions = append(completions, view.AutocompleteRoom(word)...)
 
 	if len(completions) == 1 {
 		completion := completions[0]
 		strCompletion = fmt.Sprintf("[%s](https://matrix.to/#/%s)", completion.displayName, completion.id)
-		if startIndex == 0 {
-			strCompletion = strCompletion + ": "
+		if startIndex == 0 && completion.id[0] == '@' {
+			strCompletion = strCompletion + ":"
 		}
 	} else if len(completions) > 1 {
 		for _, completion := range completions {
@@ -608,18 +618,44 @@ func (view *RoomView) InputTabComplete(text string, cursorOffset int) {
 		}
 	}
 
-	strCompletions = append(strCompletions, view.autocompleteEmoji(word)...)
+	strCompletions = append(strCompletions, view.parent.cmdProcessor.AutocompleteCommand(word)...)
+	strCompletions = append(strCompletions, view.AutocompleteEmoji(word)...)
+
+	return
+}
+
+func (view *RoomView) InputTabComplete(text string, cursorOffset int) {
+	if len(text) == 0 {
+		return
+	}
+
+	debug.Print("Tab completing", cursorOffset, text)
+
+	str := runewidth.Truncate(text, cursorOffset, "")
+	word := findWordToTabComplete(str)
+	startIndex := len(str) - len(word)
+
+	var strCompletion string
+
+	strCompletions, newText, ok := view.parent.cmdProcessor.Autocomplete(view, text, cursorOffset)
+	if !ok {
+		strCompletions, strCompletion = view.defaultAutocomplete(word, startIndex)
+	}
 
 	if len(strCompletions) > 0 {
 		strCompletion = util.LongestCommonPrefix(strCompletions)
 		sort.Sort(sort.StringSlice(strCompletions))
 	}
+	if len(strCompletion) > 0 && len(strCompletions) < 2 {
+		strCompletion += " "
+		strCompletions = []string{}
+	}
 
-	if len(strCompletion) > 0 {
-		text = str[0:startIndex] + strCompletion + text[len(str):]
+	if len(strCompletion) > 0 && newText == text {
+		newText = str[0:startIndex] + strCompletion + text[len(str):]
 	}
 
-	view.input.SetTextAndMoveCursor(text)
+	view.input.SetTextAndMoveCursor(newText)
 	view.SetCompletions(strCompletions)
 }
 
diff --git a/ui/view-main.go b/ui/view-main.go
index 0f6098c..fc1b9c9 100644
--- a/ui/view-main.go
+++ b/ui/view-main.go
@@ -22,15 +22,15 @@ import (
 	"os"
 	"sync/atomic"
 	"time"
-	"unicode"
 
 	sync "github.com/sasha-s/go-deadlock"
 
-	"maunium.net/go/gomuks/ui/messages"
-	"maunium.net/go/mautrix/id"
 	"maunium.net/go/mauview"
 	"maunium.net/go/tcell"
 
+	"maunium.net/go/gomuks/ui/messages"
+	"maunium.net/go/mautrix/id"
+
 	"maunium.net/go/gomuks/config"
 	"maunium.net/go/gomuks/debug"
 	"maunium.net/go/gomuks/interface"
@@ -139,18 +139,6 @@ func (view *MainView) InputChanged(roomView *RoomView, text string) {
 	}
 }
 
-func findWordToTabComplete(text string) string {
-	output := ""
-	runes := []rune(text)
-	for i := len(runes) - 1; i >= 0; i-- {
-		if unicode.IsSpace(runes[i]) {
-			break
-		}
-		output = string(runes[i]) + output
-	}
-	return output
-}
-
 func (view *MainView) ShowBare(roomView *RoomView) {
 	if roomView == nil {
 		return