group: publishing chat messages.

go.mod

@@ -3,7 +3,7 @@ module github.com/fiatjaf/nak
 go 1.25
 
 require (
-	fiatjaf.com/nostr v0.0.0-20260118173002-57d595a5b4c7
+	fiatjaf.com/nostr v0.0.0-20260119010708-31af06f4c7c4
 	github.com/AlecAivazis/survey/v2 v2.3.7
 	github.com/bep/debounce v1.2.1
 	github.com/btcsuite/btcd/btcec/v2 v2.3.6

go.sum

@@ -1,9 +1,7 @@
 fiatjaf.com/lib v0.3.2 h1:RBS41z70d8Rp8e2nemQsbPY1NLLnEGShiY2c+Bom3+Q=
 fiatjaf.com/lib v0.3.2/go.mod h1:UlHaZvPHj25PtKLh9GjZkUHRmQ2xZ8Jkoa4VRaLeeQ8=
-fiatjaf.com/nostr v0.0.0-20251230181913-e52ffa631bd6 h1:yH+cU9ZNgUdMCRa5eS3pmqTPP/QdZtSmQAIrN/U5nEc=
-fiatjaf.com/nostr v0.0.0-20251230181913-e52ffa631bd6/go.mod h1:ue7yw0zHfZj23Ml2kVSdBx0ENEaZiuvGxs/8VEN93FU=
-fiatjaf.com/nostr v0.0.0-20260118173002-57d595a5b4c7 h1:CkMr8zFLfoOO59+oNlBXXrga00lTKyl2A4fUXAJQ7fY=
-fiatjaf.com/nostr v0.0.0-20260118173002-57d595a5b4c7/go.mod h1:ue7yw0zHfZj23Ml2kVSdBx0ENEaZiuvGxs/8VEN93FU=
+fiatjaf.com/nostr v0.0.0-20260119010708-31af06f4c7c4 h1:/6AVjHIbbgyuiilcUuoFPMXGNXqialKGQM7uskF0b/0=
+fiatjaf.com/nostr v0.0.0-20260119010708-31af06f4c7c4/go.mod h1:ue7yw0zHfZj23Ml2kVSdBx0ENEaZiuvGxs/8VEN93FU=
 github.com/AlecAivazis/survey/v2 v2.3.7 h1:6I/u8FvytdGsgonrYsVn2t8t4QiRnh6QSTqkkhIiSjQ=
 github.com/AlecAivazis/survey/v2 v2.3.7/go.mod h1:xUTIdE4KCOIjsBAE1JYsUPoCqYdZ1reCfTwbto0Fduo=
 github.com/FastFilter/xorfilter v0.2.1 h1:lbdeLG9BdpquK64ZsleBS8B4xO/QW1IM0gMzF7KaBKc=

group.go

@@ -0,0 +1,383 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"sync"
+	"time"
+
+	"fiatjaf.com/nostr"
+	"fiatjaf.com/nostr/nip29"
+	"github.com/fatih/color"
+	"github.com/urfave/cli/v3"
+)
+
+var group = &cli.Command{
+	Name:                      "group",
+	Aliases:                   []string{"nip29"},
+	Usage:                     "group-related operations: info, chat, forum, members, admins, roles",
+	Description:               `manage and interact with Nostr communities (NIP-29). Use "nak group <subcommand> <relay>'<identifier>" where host.tld is the relay and identifier is the group identifier.`,
+	DisableSliceFlagSeparator: true,
+	ArgsUsage:                 "<subcommand> <relay>'<identifier> [flags]",
+	Flags:                     defaultKeyFlags,
+	Commands: []*cli.Command{
+		{
+			Name:        "info",
+			Usage:       "show group information",
+			Description: "displays basic group metadata.",
+			ArgsUsage:   "<relay>'<identifier>",
+			Action: func(ctx context.Context, c *cli.Command) error {
+				relay, identifier, err := parseGroupIdentifier(c)
+				if err != nil {
+					return err
+				}
+
+				group := nip29.Group{}
+				for ie := range sys.Pool.FetchMany(ctx, []string{relay}, nostr.Filter{
+					Kinds: []nostr.Kind{nostr.KindSimpleGroupMetadata},
+					Tags:  nostr.TagMap{"d": []string{identifier}},
+				}, nostr.SubscriptionOptions{Label: "nak-nip29"}) {
+					if err := group.MergeInMetadataEvent(&ie.Event); err != nil {
+						return err
+					}
+					break
+				}
+
+				stdout("address:", color.HiBlueString(strings.SplitN(nostr.NormalizeURL(relay), "/", 3)[2]+"'"+identifier))
+				stdout("name:", color.HiBlueString(group.Name))
+				stdout("picture:", color.HiBlueString(group.Picture))
+				stdout("about:", color.HiBlueString(group.About))
+				stdout("restricted:",
+					color.HiBlueString("%s", cond(group.Restricted, "yes", "no"))+
+						", "+
+						cond(group.Restricted, "only explicit members can publish", "non-members can publish (restricted by relay policy)"),
+				)
+				stdout("closed:",
+					color.HiBlueString("%s", cond(group.Closed, "yes", "no"))+
+						", "+
+						cond(group.Closed, "joining requires an invite", "anyone can join (restricted by relay policy)"),
+				)
+				stdout("hidden:",
+					color.HiBlueString("%s", cond(group.Hidden, "yes", "no"))+
+						", "+
+						cond(group.Hidden, "group doesn't show up when listing relay groups", "group is visible to users browsing the relay"),
+				)
+				stdout("private:",
+					color.HiBlueString("%s", cond(group.Private, "yes", "no"))+
+						", "+
+						cond(group.Private, "group content is not accessible to non-members", "group content is public"),
+				)
+				return nil
+			},
+		},
+		{
+			Name:        "members",
+			Usage:       "list and manage group members",
+			Description: "view group membership information.",
+			ArgsUsage:   "<relay>'<identifier>",
+			Action: func(ctx context.Context, c *cli.Command) error {
+				relay, identifier, err := parseGroupIdentifier(c)
+				if err != nil {
+					return err
+				}
+
+				group := nip29.Group{
+					Members: make(map[nostr.PubKey][]*nip29.Role),
+				}
+				for ie := range sys.Pool.FetchMany(ctx, []string{relay}, nostr.Filter{
+					Kinds: []nostr.Kind{nostr.KindSimpleGroupMembers},
+					Tags:  nostr.TagMap{"d": []string{identifier}},
+				}, nostr.SubscriptionOptions{Label: "nak-nip29"}) {
+					if err := group.MergeInMembersEvent(&ie.Event); err != nil {
+						return err
+					}
+					break
+				}
+
+				lines := make(chan string)
+				wg := sync.WaitGroup{}
+
+				for member, roles := range group.Members {
+					wg.Go(func() {
+						line := member.Hex()
+
+						meta := sys.FetchProfileMetadata(ctx, member)
+						line += " (" + color.HiBlueString(meta.ShortName()) + ")"
+
+						for _, role := range roles {
+							line += ", " + role.Name
+						}
+
+						lines <- line
+					})
+				}
+
+				go func() {
+					wg.Wait()
+					close(lines)
+				}()
+
+				for line := range lines {
+					stdout(line)
+				}
+
+				return nil
+			},
+		},
+		{
+			Name:        "admins",
+			Usage:       "manage group administrators",
+			Description: "view and manage group admin permissions.",
+			ArgsUsage:   "<relay>'<identifier>",
+			Action: func(ctx context.Context, c *cli.Command) error {
+				relay, identifier, err := parseGroupIdentifier(c)
+				if err != nil {
+					return err
+				}
+
+				group := nip29.Group{
+					Members: make(map[nostr.PubKey][]*nip29.Role),
+				}
+				for ie := range sys.Pool.FetchMany(ctx, []string{relay}, nostr.Filter{
+					Kinds: []nostr.Kind{nostr.KindSimpleGroupAdmins},
+					Tags:  nostr.TagMap{"d": []string{identifier}},
+				}, nostr.SubscriptionOptions{Label: "nak-nip29"}) {
+					if err := group.MergeInAdminsEvent(&ie.Event); err != nil {
+						return err
+					}
+					break
+				}
+
+				lines := make(chan string)
+				wg := sync.WaitGroup{}
+
+				for member, roles := range group.Members {
+					wg.Go(func() {
+						line := member.Hex()
+
+						meta := sys.FetchProfileMetadata(ctx, member)
+						line += " (" + color.HiBlueString(meta.ShortName()) + ")"
+
+						for _, role := range roles {
+							line += ", " + role.Name
+						}
+
+						lines <- line
+					})
+				}
+
+				go func() {
+					wg.Wait()
+					close(lines)
+				}()
+
+				for line := range lines {
+					stdout(line)
+				}
+
+				return nil
+			},
+		},
+		{
+			Name:        "roles",
+			Usage:       "manage group roles and permissions",
+			Description: "configure custom roles and permissions within the group.",
+			ArgsUsage:   "<relay>'<identifier>",
+			Action: func(ctx context.Context, c *cli.Command) error {
+				relay, identifier, err := parseGroupIdentifier(c)
+				if err != nil {
+					return err
+				}
+
+				group := nip29.Group{
+					Roles: make([]*nip29.Role, 0),
+				}
+				for ie := range sys.Pool.FetchMany(ctx, []string{relay}, nostr.Filter{
+					Kinds: []nostr.Kind{nostr.KindSimpleGroupRoles},
+					Tags:  nostr.TagMap{"d": []string{identifier}},
+				}, nostr.SubscriptionOptions{Label: "nak-nip29"}) {
+					if err := group.MergeInRolesEvent(&ie.Event); err != nil {
+						return err
+					}
+					break
+				}
+
+				for _, role := range group.Roles {
+					stdout(color.HiBlueString(role.Name) + " " + role.Description)
+				}
+
+				return nil
+			},
+		},
+		{
+			Name:        "chat",
+			Usage:       "send and read group chat messages",
+			Description: "interact with group chat functionality.",
+			ArgsUsage:   "<relay>'<identifier>",
+			Action: func(ctx context.Context, c *cli.Command) error {
+				relay, identifier, err := parseGroupIdentifier(c)
+				if err != nil {
+					return err
+				}
+
+				r, err := sys.Pool.EnsureRelay(relay)
+				if err != nil {
+					return err
+				}
+
+				sub, err := r.Subscribe(ctx, nostr.Filter{
+					Kinds: []nostr.Kind{9},
+					Tags:  nostr.TagMap{"h": []string{identifier}},
+					Limit: 200,
+				}, nostr.SubscriptionOptions{Label: "nak-nip29"})
+				if err != nil {
+					return err
+				}
+				defer sub.Close()
+
+				eosed := false
+				messages := make([]struct {
+					message  string
+					rendered bool
+				}, 200)
+				base := len(messages)
+
+				tryRender := func(i int) {
+					// if all messages before these are loaded we can render this,
+					// otherwise we render whatever we can and stop
+					for m, msg := range messages[base:] {
+						if msg.rendered {
+							continue
+						}
+						if msg.message == "" {
+							break
+						}
+						messages[base+m].rendered = true
+						stdout(msg.message)
+					}
+				}
+
+				for {
+					select {
+					case evt := <-sub.Events:
+						var i int
+						if eosed {
+							i = len(messages)
+							messages = append(messages, struct {
+								message  string
+								rendered bool
+							}{})
+						} else {
+							base--
+							i = base
+						}
+
+						go func() {
+							meta := sys.FetchProfileMetadata(ctx, evt.PubKey)
+							messages[i].message = color.HiBlueString(meta.ShortName()) + " " + color.HiCyanString(evt.CreatedAt.Time().Format(time.DateTime)) + ": " + evt.Content
+
+							if eosed {
+								tryRender(i)
+							}
+						}()
+					case reason := <-sub.ClosedReason:
+						stdout("closed:" + color.YellowString(reason))
+					case <-sub.EndOfStoredEvents:
+						eosed = true
+						tryRender(len(messages) - 1)
+					case <-sub.Context.Done():
+						return fmt.Errorf("subscription ended: %w", context.Cause(sub.Context))
+					}
+				}
+			},
+			Commands: []*cli.Command{
+				{
+					Name:      "send",
+					Usage:     "sends a message to the chat",
+					ArgsUsage: "<message>",
+					Action: func(ctx context.Context, c *cli.Command) error {
+						relay, identifier, err := parseGroupIdentifier(c)
+						if err != nil {
+							return err
+						}
+
+						kr, _, err := gatherKeyerFromArguments(ctx, c)
+						if err != nil {
+							return err
+						}
+
+						msg := nostr.Event{
+							Kind:      9,
+							CreatedAt: nostr.Now(),
+							Content:   strings.Join(c.Args().Tail(), " "),
+							Tags: nostr.Tags{
+								{"h", identifier},
+							},
+						}
+						if err := kr.SignEvent(ctx, &msg); err != nil {
+							return fmt.Errorf("failed to sign message: %w", err)
+						}
+
+						if r, err := sys.Pool.EnsureRelay(relay); err != nil {
+							return err
+						} else {
+							return r.Publish(ctx, msg)
+						}
+					},
+				},
+			},
+		},
+		{
+			Name:        "forum",
+			Usage:       "read group forum posts",
+			Description: "access group forum functionality.",
+			ArgsUsage:   "<relay>'<identifier>",
+			Action: func(ctx context.Context, c *cli.Command) error {
+				relay, identifier, err := parseGroupIdentifier(c)
+				if err != nil {
+					return err
+				}
+
+				for evt := range sys.Pool.FetchMany(ctx, []string{relay}, nostr.Filter{
+					Kinds: []nostr.Kind{11},
+					Tags:  nostr.TagMap{"#h": []string{identifier}},
+				}, nostr.SubscriptionOptions{Label: "nak-nip29"}) {
+					title := evt.Tags.Find("title")
+					if title != nil {
+						stdout(colors.bold(title[1]))
+					} else {
+						stdout(colors.bold("<untitled>"))
+					}
+					meta := sys.FetchProfileMetadata(ctx, evt.PubKey)
+					stdout("by " + evt.PubKey.Hex() + " (" + color.HiBlueString(meta.ShortName()) + ") at " + evt.CreatedAt.Time().Format(time.DateTime))
+					stdout(evt.Content)
+				}
+				// TODO: see what to do about this
+
+				return nil
+			},
+		},
+	},
+}
+
+func cond(b bool, ifYes string, ifNo string) string {
+	if b {
+		return ifYes
+	}
+	return ifNo
+}
+
+func parseGroupIdentifier(c *cli.Command) (relay string, identifier string, err error) {
+	groupArg := c.Args().First()
+	if !strings.Contains(groupArg, "'") {
+		return "", "", fmt.Errorf("invalid group identifier format, expected <relay>'<identifier>")
+	}
+
+	parts := strings.SplitN(groupArg, "'", 2)
+	if len(parts) != 2 || parts[0] == "" || parts[1] == "" {
+		return "", "", fmt.Errorf("invalid group identifier format, expected <relay>'<identifier>")
+	}
+
+	return strings.TrimSuffix(parts[0], "/"), parts[1], nil
+}

main.go

@@ -50,6 +50,7 @@ var app = &cli.Command{
 		fsCmd,
 		publish,
 		git,
+		group,
 		nip,
 		syncCmd,
 		spell,