Add unfinished command handler system based on the improved bot support proposal

app/plugins.go

@@ -88,7 +88,7 @@ func (bot *Bot) createPlugins() {
 
 		log.Debugf("Created plugin %s (type %s v%s)\n", plugin.ID, creator.Name, creator.Version)
 		bot.Plugins[plugin.ID] = &PluginWrapper{
-			Plugin:  creator.Create(client),
+			Plugin:  creator.Create(client.Proxy(plugin.ID)),
 			Creator: creator,
 			DB:      plugin,
 		}

commands.go

@@ -0,0 +1,105 @@
+// maubot - A plugin-based Matrix bot system written in Go.
+// Copyright (C) 2018 Tulir Asokan
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package maubot
+
+type CommandHandler func(*Event)
+
+type CommandSpec struct {
+	Commands        []Command        `json:"commands"`
+	PassiveCommands []PassiveCommand `json:"passive_commands"`
+}
+
+func (spec *CommandSpec) Equals(otherSpec *CommandSpec) bool {
+	if len(spec.Commands) != len(otherSpec.Commands) || len(spec.PassiveCommands) != len(otherSpec.PassiveCommands) {
+		return false
+	}
+
+	for index, cmd := range spec.Commands {
+		otherCmd := otherSpec.Commands[index]
+		if !cmd.Equals(otherCmd) {
+			return false
+		}
+	}
+
+	for index, cmd := range spec.PassiveCommands {
+		otherCmd := otherSpec.PassiveCommands[index]
+		if !cmd.Equals(otherCmd) {
+			return false
+		}
+	}
+
+	return true
+}
+
+type Command struct {
+	Syntax      string      `json:"syntax"`
+	Description string      `json:"description,omitempty"`
+	Arguments   ArgumentMap `json:"arguments"`
+}
+
+func (cmd Command) Equals(otherCmd Command) bool {
+	return cmd.Syntax == otherCmd.Syntax &&
+		cmd.Description == otherCmd.Description &&
+		cmd.Arguments.Equals(otherCmd.Arguments)
+}
+
+type ArgumentMap map[string]Argument
+
+func (argMap ArgumentMap) Equals(otherMap ArgumentMap) bool {
+	if len(argMap) != len(otherMap) {
+		return false
+	}
+
+	for name, argument := range argMap {
+		otherArgument, ok := otherMap[name]
+		if !ok || !argument.Equals(otherArgument) {
+			return false
+		}
+	}
+	return true
+}
+
+type Argument struct {
+	Matches     string `json:"matches"`
+	Required    bool   `json:"required"`
+	Description string `json:"description,omitempty"`
+}
+
+func (arg Argument) Equals(otherArg Argument) bool {
+	return arg.Matches == otherArg.Matches &&
+		arg.Required == otherArg.Required &&
+		arg.Description == otherArg.Description
+}
+
+// Common PassiveCommand MatchAgainst targets.
+const (
+	MatchAgainstBody = "body"
+)
+
+type PassiveCommand struct {
+	Name         string `json:"name"`
+	Matches      string `json:"matches"`
+	MatchAgainst string `json:"match_against"`
+	MatchEvent   *Event `json:"match_event"`
+}
+
+func (cmd PassiveCommand) Equals(otherCmd PassiveCommand) bool {
+	return cmd.Name == otherCmd.Name &&
+		cmd.Matches == otherCmd.Matches &&
+		cmd.MatchAgainst == otherCmd.MatchAgainst &&
+		((cmd.MatchEvent != nil && cmd.MatchEvent.Equals(otherCmd.MatchEvent)) || otherCmd.MatchEvent == nil)
+}

database/clients.go

@@ -1,4 +1,4 @@
-// jesaribot - A simple maubot plugin.
+// maubot - A plugin-based Matrix bot system written in Go.
 // Copyright (C) 2018 Tulir Asokan
 //
 // This program is free software: you can redistribute it and/or modify
@@ -17,6 +17,7 @@
 package database
 
 import (
+	"maubot.xyz"
 	log "maunium.net/go/maulogger"
 	"database/sql"
 )
@@ -35,6 +36,8 @@ type MatrixClient struct {
 	AutoJoinRooms bool   `json:"auto_join_rooms"`
 	DisplayName   string `json:"display_name"`
 	AvatarURL     string `json:"avatar_url"`
+
+	Commands map[string]*CommandSpec `json:"commandspecs"`
 }
 
 type MatrixClientStatic struct {
@@ -85,15 +88,32 @@ func (mcs *MatrixClientStatic) New() *MatrixClient {
 	}
 }
 
-type Scannable interface {
-	Scan(...interface{}) error
-}
-
 func (mxc *MatrixClient) Scan(row Scannable) *MatrixClient {
 	err := row.Scan(&mxc.UserID, &mxc.Homeserver, &mxc.AccessToken, &mxc.NextBatch, &mxc.FilterID, &mxc.Sync, &mxc.AutoJoinRooms, &mxc.DisplayName, &mxc.AvatarURL)
 	if err != nil {
 		log.Fatalln("Database scan failed:", err)
 	}
+	mxc.LoadCommandSpecs()
+	return mxc
+}
+
+func (mxc *MatrixClient) SetCommandSpec(owner string, newSpec *maubot.CommandSpec) bool {
+	spec := mxc.db.CommandSpec.GetOrCreate(owner, mxc.UserID)
+	if newSpec.Equals(spec.CommandSpec) {
+		return false
+	}
+	spec.CommandSpec = newSpec
+	spec.Update()
+	mxc.Commands[owner] = spec
+	return true
+}
+
+func (mxc *MatrixClient) LoadCommandSpecs() *MatrixClient {
+	specs := mxc.db.CommandSpec.GetAllByClient(mxc.UserID)
+	mxc.Commands = make(map[string]*CommandSpec)
+	for _, spec := range specs {
+		mxc.Commands[spec.Owner] = spec
+	}
 	return mxc
 }
 

database/commands.go

@@ -0,0 +1,130 @@
+// maubot - A plugin-based Matrix bot system written in Go.
+// Copyright (C) 2018 Tulir Asokan
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package database
+
+import (
+	"database/sql"
+	"encoding/json"
+
+	"maubot.xyz"
+	log "maunium.net/go/maulogger"
+)
+
+type CommandSpec struct {
+	db  *Database
+	sql *sql.DB
+
+	*maubot.CommandSpec
+	Owner  string `json:"owner"`
+	Client string `json:"client"`
+}
+
+type CommandSpecStatic struct {
+	db  *Database
+	sql *sql.DB
+}
+
+func (css *CommandSpecStatic) CreateTable() error {
+	_, err := css.sql.Exec(`CREATE TABLE IF NOT EXISTS command_spec (
+		owner  VARCHAR(255),
+		client VARCHAR(255),
+		spec   TEXT,
+
+		PRIMARY KEY (owner, client),
+		FOREIGN KEY (owner) REFERENCES plugin(id)
+				ON DELETE CASCADE ON UPDATE CASCADE,
+		FOREIGN KEY (client) REFERENCES matrix_client(user_id)
+				ON DELETE CASCADE ON UPDATE CASCADE
+	)`)
+	return err
+}
+
+func (css *CommandSpecStatic) Get(owner, client string) *CommandSpec {
+	row := css.sql.QueryRow("SELECT * FROM command_spec WHERE owner=? AND client=?", owner, client)
+	if row != nil {
+		return css.New().Scan(row)
+	}
+	return nil
+}
+
+func (css *CommandSpecStatic) GetOrCreate(owner, client string) (spec *CommandSpec) {
+	spec = css.Get(owner, client)
+	if spec == nil {
+		spec = css.New()
+		spec.Owner = owner
+		spec.Client = client
+		spec.Insert()
+	}
+	return
+}
+
+func (css *CommandSpecStatic) getAllByQuery(query string, args ...interface{}) (specs []*CommandSpec) {
+	rows, err := css.sql.Query(query, args...)
+	if err != nil || rows == nil {
+		return nil
+	}
+	defer rows.Close()
+	for rows.Next() {
+		specs = append(specs, css.New().Scan(rows))
+	}
+	return
+}
+
+func (css *CommandSpecStatic) GetAllByOwner(owner string) []*CommandSpec {
+	return css.getAllByQuery("SELECT * FROM command_spec WHERE owner=?", owner)
+}
+
+func (css *CommandSpecStatic) GetAllByClient(client string) []*CommandSpec {
+	return css.getAllByQuery("SELECT * FROM command_spec WHERE client=?", client)
+}
+
+func (css *CommandSpecStatic) New() *CommandSpec {
+	return &CommandSpec{
+		db:  css.db,
+		sql: css.sql,
+	}
+}
+
+func (cs *CommandSpec) Scan(row Scannable) *CommandSpec {
+	var spec string
+	err := row.Scan(&cs.Owner, &cs.Client, &spec)
+	if err != nil {
+		log.Fatalln("Database scan failed:", err)
+	}
+	json.Unmarshal([]byte(spec), &cs.CommandSpec)
+	return cs
+}
+
+func (cs *CommandSpec) Insert() error {
+	data, err := json.Marshal(cs.CommandSpec)
+	if err != nil {
+		return err
+	}
+	_, err = cs.sql.Exec("INSERT INTO command_spec (owner, client, spec) VALUES (?, ?, ?)",
+		cs.Owner, cs.Client, string(data))
+	return err
+}
+
+func (cs *CommandSpec) Update() error {
+	data, err := json.Marshal(cs.CommandSpec)
+	if err != nil {
+		return err
+	}
+	_, err = cs.sql.Exec("UPDATE command_spec SET spec=? WHERE owner=? AND client=?",
+		string(data), cs.Owner, cs.Client)
+	return err
+}

database/database.go

@@ -1,4 +1,4 @@
-// jesaribot - A simple maubot plugin.
+// maubot - A plugin-based Matrix bot system written in Go.
 // Copyright (C) 2018 Tulir Asokan
 //
 // This program is free software: you can redistribute it and/or modify
@@ -22,12 +22,17 @@ import (
 	log "maunium.net/go/maulogger"
 )
 
+type Scannable interface {
+	Scan(...interface{}) error
+}
+
 type Database struct {
 	Type string `yaml:"type"`
 	Name string `yaml:"name"`
 
 	MatrixClient *MatrixClientStatic `yaml:"-"`
 	Plugin       *PluginStatic       `yaml:"-"`
+	CommandSpec  *CommandSpecStatic  `yaml:"-"`
 
 	sql *sql.DB
 }
@@ -40,6 +45,7 @@ func (db *Database) Connect() (err error) {
 
 	db.MatrixClient = &MatrixClientStatic{db: db, sql: db.sql}
 	db.Plugin = &PluginStatic{db: db, sql: db.sql}
+	db.CommandSpec = &CommandSpecStatic{db: db, sql: db.sql}
 
 	return nil
 }

database/plugins.go

@@ -1,4 +1,4 @@
-// jesaribot - A simple maubot plugin.
+// maubot - A plugin-based Matrix bot system written in Go.
 // Copyright (C) 2018 Tulir Asokan
 //
 // This program is free software: you can redistribute it and/or modify

matrix.go

@@ -63,6 +63,8 @@ const (
 
 type MatrixClient interface {
 	AddEventHandler(EventType, EventHandler)
+	AddCommandHandler(string, CommandHandler)
+	SetCommandSpec(*CommandSpec)
 	GetEvent(string, string) *Event
 }
 
@@ -89,11 +91,30 @@ type Event struct {
 	Unsigned  Unsigned  `json:"unsigned,omitempty"` // Unsigned content set by own homeserver.
 }
 
+func (evt *Event) Equals(otherEvt *Event) bool {
+	return evt.StateKey == otherEvt.StateKey &&
+		evt.Sender == otherEvt.Sender &&
+		evt.Type == otherEvt.Type &&
+		evt.Timestamp == otherEvt.Timestamp &&
+		evt.ID == otherEvt.ID &&
+		evt.RoomID == otherEvt.RoomID &&
+		evt.Content.Equals(&otherEvt.Content) &&
+		evt.Redacts == otherEvt.Redacts &&
+		evt.Unsigned.Equals(&otherEvt.Unsigned)
+}
+
 type Unsigned struct {
-	PrevContent   Content `json:"prev_content,omitempty"`
-	PrevSender    string  `json:"prev_sender,omitempty"`
-	ReplacesState string  `json:"replaces_state,omitempty"`
-	Age           int64   `json:"age"`
+	PrevContent   *Content `json:"prev_content,omitempty"`
+	PrevSender    string   `json:"prev_sender,omitempty"`
+	ReplacesState string   `json:"replaces_state,omitempty"`
+	Age           int64    `json:"age"`
+}
+
+func (unsigned Unsigned) Equals(otherUnsigned *Unsigned) bool {
+	return unsigned.PrevContent.Equals(otherUnsigned.PrevContent) &&
+		unsigned.PrevSender == otherUnsigned.PrevSender &&
+		unsigned.ReplacesState == otherUnsigned.ReplacesState &&
+		unsigned.Age == otherUnsigned.Age
 }
 
 type Content struct {
@@ -104,14 +125,25 @@ type Content struct {
 	Format        string      `json:"format,omitempty"`
 	FormattedBody string      `json:"formatted_body,omitempty"`
 
-	Info FileInfo `json:"info,omitempty"`
-	URL  string   `json:"url,omitempty"`
+	Info *FileInfo `json:"info,omitempty"`
+	URL  string    `json:"url,omitempty"`
 
 	Membership string `json:"membership,omitempty"`
 
 	RelatesTo RelatesTo `json:"m.relates_to,omitempty"`
 }
 
+func (content Content) Equals(otherContent *Content) bool {
+	return content.MsgType == otherContent.MsgType &&
+		content.Body == otherContent.Body &&
+		content.Format == otherContent.Format &&
+		content.FormattedBody == otherContent.FormattedBody &&
+		((content.Info != nil && content.Info.Equals(otherContent.Info)) || otherContent.Info == nil) &&
+		content.URL == otherContent.URL &&
+		content.Membership == otherContent.Membership &&
+		content.RelatesTo == otherContent.RelatesTo
+}
+
 type FileInfo struct {
 	MimeType      string    `json:"mimetype,omitempty"`
 	ThumbnailInfo *FileInfo `json:"thumbnail_info,omitempty"`
@@ -121,6 +153,15 @@ type FileInfo struct {
 	Size          int       `json:"size,omitempty"`
 }
 
+func (fi *FileInfo) Equals(otherFI *FileInfo) bool {
+	return fi.MimeType == otherFI.MimeType &&
+		fi.ThumbnailURL == otherFI.ThumbnailURL &&
+		fi.Height == otherFI.Height &&
+		fi.Width == otherFI.Width &&
+		fi.Size == otherFI.Size &&
+		((fi.ThumbnailInfo != nil && fi.ThumbnailInfo.Equals(otherFI.ThumbnailInfo)) || otherFI.ThumbnailInfo == nil)
+}
+
 type RelatesTo struct {
 	InReplyTo InReplyTo `json:"m.in_reply_to,omitempty"`
 }

matrix/event.go

@@ -28,7 +28,8 @@ type Event struct {
 	Client *Client
 }
 
-func roundtripContent(rawContent map[string]interface{}) (content maubot.Content) {
+func roundtripContent(rawContent map[string]interface{}) (content *maubot.Content) {
+	content = &maubot.Content{}
 	if len(rawContent) == 0 {
 		content.Raw = rawContent
 		return
@@ -55,7 +56,7 @@ func (client *Client) ParseEvent(mxEvent *gomatrix.Event) *Event {
 		Timestamp:  mxEvent.Timestamp,
 		ID:         mxEvent.ID,
 		RoomID:     mxEvent.RoomID,
-		Content:    roundtripContent(mxEvent.Content),
+		Content:    *roundtripContent(mxEvent.Content),
 		Redacts:    mxEvent.Redacts,
 		Unsigned: maubot.Unsigned{
 			PrevContent:   roundtripContent(mxEvent.Unsigned.PrevContent),

matrix/matrix.go

@@ -45,10 +45,18 @@ func NewClient(db *database.MatrixClient) (*Client, error) {
 	client.Client.Syncer = client.syncer
 
 	client.AddEventHandler(maubot.StateMember, client.onJoin)
+	client.AddEventHandler(maubot.EventMessage, client.onMessage)
 
 	return client, nil
 }
 
+func (client *Client) Proxy(owner string) *ClientProxy {
+	return &ClientProxy{
+		hiddenClient: client,
+		owner:        owner,
+	}
+}
+
 func (client *Client) AddEventHandler(evt maubot.EventType, handler maubot.EventHandler) {
 	client.syncer.OnEventType(evt, func(evt *maubot.Event) maubot.EventHandlerResult {
 		if evt.Sender == client.UserID {
@@ -58,6 +66,18 @@ func (client *Client) AddEventHandler(evt maubot.EventType, handler maubot.Event
 	})
 }
 
+func (client *Client) AddCommandHandler(evt string, handler maubot.CommandHandler) {
+	// TODO add command handler
+}
+
+func (client *Client) SetCommandSpec(owner string, spec *maubot.CommandSpec) {
+	changed := client.DB.SetCommandSpec(owner, spec)
+	if changed {
+		log.Debugln("Command spec of", owner, "on", client.UserID, "updated.")
+		// TODO
+	}
+}
+
 func (client *Client) GetEvent(roomID, eventID string) *maubot.Event {
 	evt, err := client.Client.GetEvent(roomID, eventID)
 	if err != nil {
@@ -67,6 +87,11 @@ func (client *Client) GetEvent(roomID, eventID string) *maubot.Event {
 	return client.ParseEvent(evt).Event
 }
 
+func (client *Client) onMessage(evt *maubot.Event) maubot.EventHandlerResult {
+	// TODO call command handlers
+	return maubot.Continue
+}
+
 func (client *Client) onJoin(evt *maubot.Event) maubot.EventHandlerResult {
 	if client.DB.AutoJoinRooms && evt.StateKey == client.DB.UserID && evt.Content.Membership == "invite" {
 		client.JoinRoom(evt.RoomID)
@@ -87,3 +112,14 @@ func (client *Client) Sync() {
 		}
 	}()
 }
+
+type hiddenClient = Client
+
+type ClientProxy struct {
+	*hiddenClient
+	owner string
+}
+
+func (cp *ClientProxy) SetCommandSpec(spec *maubot.CommandSpec) {
+	cp.hiddenClient.SetCommandSpec(cp.owner, spec)
+}