'group forum' with the ui like 'nak git issue'.

git.go

@@ -3,7 +3,6 @@ package main
 import (
 	"context"
 	"fmt"
-	"io"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -15,7 +14,6 @@ import (
 
 	"fiatjaf.com/nostr"
 	"fiatjaf.com/nostr/nip19"
-	"fiatjaf.com/nostr/nip22"
 	"fiatjaf.com/nostr/nip34"
 	"github.com/AlecAivazis/survey/v2"
 	"github.com/fatih/color"
@@ -891,7 +889,7 @@ aside from those, there is also:
 						return err
 					}
 
-					return showGitDiscussionWithComments(ctx, repo, evt, statusLabelForEvent(evt.ID, statuses, false))
+					return showThreadWithComments(ctx, repo.Relays, evt, statusLabelForEvent(evt.ID, statuses, false), nil)
 				}
 			},
 			Commands: []*cli.Command{
@@ -1205,7 +1203,7 @@ aside from those, there is also:
 						return err
 					}
 
-					return showGitDiscussionWithComments(ctx, repo, evt, statusLabelForEvent(evt.ID, statuses, true))
+					return showThreadWithComments(ctx, repo.Relays, evt, statusLabelForEvent(evt.ID, statuses, true), nil)
 				}
 			},
 			Commands: []*cli.Command{
@@ -1218,6 +1216,11 @@ aside from those, there is also:
 							return fmt.Errorf("failed to gather keyer: %w", err)
 						}
 
+						_, selfName, selfNpub, err := keyerIdentity(ctx, kr)
+						if err != nil {
+							return fmt.Errorf("failed to get current identity: %w", err)
+						}
+
 						repo, err := readGitRepositoryFromConfig()
 						if err != nil {
 							return err
@@ -1225,7 +1228,8 @@ aside from those, there is also:
 
 						content, err := editWithDefaultEditor(
 							"nak-git-issue/NOTES_EDITMSG",
-							strings.TrimSpace(`
+							strings.TrimSpace(fmt.Sprintf(`# creating as '%s' ('%s')
+# creating issue on repository '%s'
 # the first line will be used as the issue subject
 everything is broken
 
@@ -1233,7 +1237,7 @@ everything is broken
 please fix
 
 # lines starting with '#' are ignored
-`),
+`, selfName, selfNpub, repo.ID)),
 							true,
 						)
 						if err != nil {
@@ -1569,47 +1573,6 @@ func fetchIssueStatus(
 	return latest, nil
 }
 
-func fetchGitDiscussionComments(ctx context.Context, repo nip34.Repository, discussionID nostr.ID) ([]nostr.RelayEvent, error) {
-	comments := make([]nostr.RelayEvent, 0, 15)
-	for ie := range sys.Pool.FetchMany(ctx, repo.Relays, nostr.Filter{
-		Kinds: []nostr.Kind{1111},
-		Tags: nostr.TagMap{
-			"E": []string{discussionID.Hex()},
-		},
-		Limit: 500,
-	}, nostr.SubscriptionOptions{Label: "nak-git"}) {
-		comments = append(comments, ie)
-	}
-
-	slices.SortFunc(comments, nostr.CompareRelayEvent)
-
-	return comments, nil
-}
-
-func showGitDiscussionWithComments(
-	ctx context.Context,
-	repo nip34.Repository,
-	evt nostr.RelayEvent,
-	status string,
-) error {
-	comments, err := fetchGitDiscussionComments(ctx, repo, evt.ID)
-	if err != nil {
-		return err
-	}
-
-	printGitDiscussionMetadata(ctx, os.Stdout, evt, status, true)
-	stdout("")
-	stdout(evt.Content)
-
-	if len(comments) > 0 {
-		stdout("")
-		stdout(color.CyanString("comments:"))
-		printGitDiscussionCommentsThreaded(ctx, os.Stdout, comments, evt.ID, true)
-	}
-
-	return nil
-}
-
 func gitDiscussionReply(
 	ctx context.Context,
 	c *cli.Command,
@@ -1627,6 +1590,11 @@ func gitDiscussionReply(
 		return fmt.Errorf("failed to gather keyer: %w", err)
 	}
 
+	_, selfName, selfNpub, err := keyerIdentity(ctx, kr)
+	if err != nil {
+		return fmt.Errorf("failed to get current identity: %w", err)
+	}
+
 	repo, err := readGitRepositoryFromConfig()
 	if err != nil {
 		return err
@@ -1642,21 +1610,31 @@ func gitDiscussionReply(
 		return err
 	}
 
-	comments, err := fetchGitDiscussionComments(ctx, repo, discussionEvt.ID)
+	comments, err := fetchThreadComments(ctx, repo.Relays, discussionEvt.ID, nil)
 	if err != nil {
 		return err
 	}
 
+	subject := subjectPreview(discussionEvt, 72)
+	if subject == "" {
+		subject = "<untitled>"
+	}
+	pm := sys.FetchProfileMetadata(ctx, discussionEvt.PubKey)
+	headerLines := []string{
+		fmt.Sprintf("commenting as '%s' ('%s')", selfName, selfNpub),
+		fmt.Sprintf("commenting on %s '%s' '%s' by '%s' ('%s') on repository '%s'", discussionName, discussionEvt.ID.Hex()[:6], subject, pm.ShortName(), pm.NpubShort(), repo.ID),
+	}
+
 	edited, err := editWithDefaultEditor(
 		fmt.Sprintf("nak-git-%s-reply/NOTES_EDITMSG", discussionName),
-		gitDiscussionReplyEditorTemplate(ctx, discussionEvt, comments),
+		threadReplyEditorTemplate(ctx, headerLines, discussionEvt, comments),
 		true,
 	)
 	if err != nil {
 		return err
 	}
 
-	content, parentEvt, err := parseGitDiscussionReplyContent(discussionEvt, comments, edited)
+	content, parentEvt, err := parseThreadReplyContent(discussionEvt, comments, edited)
 	if err != nil {
 		return err
 	}
@@ -1789,122 +1767,6 @@ func ensureGitRepositoryMaintainer(ctx context.Context, kr nostr.Keyer, repo nip
 	return pubkey, nil
 }
 
-func printGitDiscussionCommentsThreaded(
-	ctx context.Context,
-	w io.Writer,
-	comments []nostr.RelayEvent,
-	discussionID nostr.ID,
-	withColor bool,
-) {
-	byID := make(map[nostr.ID]struct{}, len(comments)+1)
-	byID[discussionID] = struct{}{}
-	for _, c := range comments {
-		byID[c.ID] = struct{}{}
-	}
-
-	// preload metadata from everybody
-	wg := sync.WaitGroup{}
-
-	children := make(map[nostr.ID][]nostr.RelayEvent, len(comments)+1)
-	for _, c := range comments {
-		wg.Go(func() {
-			sys.FetchProfileMetadata(ctx, c.PubKey)
-		})
-
-		parent, ok := nip22.GetImmediateParent(c.Event.Tags).(nostr.EventPointer)
-		if !ok {
-			continue
-		}
-		if _, ok := byID[parent.ID]; ok {
-			children[parent.ID] = append(children[parent.ID], c)
-		}
-	}
-
-	for parent := range children {
-		slices.SortFunc(children[parent], nostr.CompareRelayEvent)
-	}
-
-	wg.Wait()
-
-	var render func(parent nostr.ID, depth int)
-	render = func(parent nostr.ID, depth int) {
-		for _, c := range children[parent] {
-			indent := strings.Repeat("  ", depth)
-			author := authorPreview(ctx, c.PubKey)
-			created := c.CreatedAt.Time().Format(time.DateTime)
-
-			if withColor {
-				fmt.Fprintln(w, indent+color.CyanString("["+c.ID.Hex()[0:6]+"]"), color.HiBlueString(author), color.HiBlackString(created))
-			} else {
-				fmt.Fprintln(w, indent+"["+c.ID.Hex()[0:6]+"] "+author+" "+created)
-			}
-
-			for _, line := range strings.Split(c.Content, "\n") {
-				fmt.Fprintln(w, indent+"  "+line)
-			}
-			fmt.Fprintln(w, indent+"")
-
-			render(c.ID, depth+1)
-		}
-	}
-
-	render(discussionID, 0)
-}
-
-func findEventByPrefix(events []nostr.RelayEvent, prefix string) (nostr.RelayEvent, error) {
-	prefix = strings.ToLower(strings.TrimSpace(prefix))
-	if prefix == "" {
-		return nostr.RelayEvent{}, fmt.Errorf("missing event id prefix")
-	}
-
-	matchCount := 0
-	matched := nostr.RelayEvent{}
-	for _, evt := range events {
-		if strings.HasPrefix(evt.ID.Hex(), prefix) {
-			matched = evt
-			matchCount++
-		}
-	}
-
-	if matchCount == 0 {
-		return nostr.RelayEvent{}, fmt.Errorf("no event found with id prefix '%s'", prefix)
-	}
-	if matchCount > 1 {
-		return nostr.RelayEvent{}, fmt.Errorf("id prefix '%s' is ambiguous", prefix)
-	}
-
-	return matched, nil
-}
-
-func printGitDiscussionMetadata(
-	ctx context.Context,
-	w io.Writer,
-	evt nostr.RelayEvent,
-	status string,
-	withColors bool,
-) {
-	label := func(s string) string { return s }
-	value := func(s string) string { return s }
-	statusValue := func(s string) string { return s }
-	if withColors {
-		label = func(s string) string { return color.CyanString(s) }
-		value = func(s string) string { return color.HiWhiteString(s) }
-		statusValue = colorizeGitStatus
-	}
-
-	fmt.Fprintln(w, label("id:"), value(evt.ID.Hex()))
-	fmt.Fprintln(w, label("kind:"), value(fmt.Sprintf("%d", evt.Kind.Num())))
-	fmt.Fprintln(w, label("author:"), value(authorPreview(ctx, evt.PubKey)))
-	fmt.Fprintln(w, label("created:"), value(evt.CreatedAt.Time().Format(time.RFC3339)))
-	if status != "" {
-		fmt.Fprintln(w, label("status:"), statusValue(status))
-	}
-	if subject := evt.Tags.Find("subject"); subject != nil && len(subject) >= 2 {
-		fmt.Fprintln(w, label("subject:"), value(subject[1]))
-		fmt.Fprintln(w, "")
-	}
-}
-
 var patchPrefixRe = regexp.MustCompile(`(?i)^\[patch[^\]]*\]\s*`)
 
 func patchSubjectPreview(evt nostr.RelayEvent, maxChars int) string {
@@ -1984,90 +1846,6 @@ func parseIssueCreateContent(content string) (subject string, body string, err e
 	return subject, body, nil
 }
 
-func parseGitDiscussionReplyContent(discussion nostr.RelayEvent, comments []nostr.RelayEvent, edited string) (string, nostr.RelayEvent, error) {
-	currentParent := discussion
-	selectedParent := nostr.ZeroID
-	inComments := false
-
-	replyb := strings.Builder{}
-	for _, line := range strings.Split(edited, "\n") {
-		line = strings.TrimSpace(line)
-
-		if strings.HasPrefix(line, "#") && !strings.HasPrefix(line, "#>") {
-			inComments = false
-			currentParent = discussion
-			continue
-		}
-
-		if replyb.Len() == 0 && line == "" {
-			continue
-		}
-
-		if strings.HasPrefix(line, "#>") {
-			quoted := strings.TrimSpace(strings.TrimPrefix(line, "#>"))
-			if quoted == "comments:" {
-				inComments = true
-				currentParent = discussion
-				continue
-			}
-
-			// keep track of which comment the reply body shows up below of
-			// so we can assign it as a reply to that specifically
-			fields := strings.Fields(quoted)
-			if inComments && len(fields) > 0 && fields[0][0] == '[' && fields[0][len(fields[0])-1] == ']' {
-				currId := fields[0][1 : len(fields[0])-1]
-				for _, comment := range comments {
-					if strings.HasPrefix(comment.ID.Hex(), currId) {
-						currentParent = comment
-						break
-					}
-				}
-			}
-
-			continue
-		}
-
-		// if we reach here this is a line for the reply input from the user
-		replyb.WriteString(line)
-		replyb.WriteByte('\n')
-
-		if line == "" {
-			continue
-		}
-
-		if selectedParent != nostr.ZeroID && selectedParent != currentParent.ID {
-			return "", nostr.RelayEvent{}, fmt.Errorf("can only reply to one comment or create a top-level comment, got replies to both %s and %s", selectedParent.Hex()[0:6], currentParent.ID.Hex()[0:6])
-		}
-
-		selectedParent = currentParent.ID
-	}
-
-	content := strings.TrimSpace(replyb.String())
-	if content == "" {
-		return "", nostr.RelayEvent{}, fmt.Errorf("empty reply content, aborting")
-	}
-
-	if selectedParent == nostr.ZeroID || selectedParent == discussion.ID {
-		return content, discussion, nil
-	}
-
-	for _, comment := range comments {
-		if comment.ID == selectedParent {
-			return content, comment, nil
-		}
-	}
-
-	panic("selected reply parent not found (this never happens)")
-}
-
-func authorPreview(ctx context.Context, pubkey nostr.PubKey) string {
-	meta := sys.FetchProfileMetadata(ctx, pubkey)
-	if meta.Name != "" {
-		return meta.ShortName() + " (" + meta.NpubShort() + ")"
-	}
-	return meta.NpubShort()
-}
-
 func statusLabelForEvent(id nostr.ID, statuses map[nostr.ID]nostr.Event, isIssue bool) string {
 	statusEvt, ok := statuses[id]
 	if !ok {
@@ -2123,43 +1901,6 @@ func shortCommitID(commit string, n int) string {
 	return commit[:n]
 }
 
-func gitDiscussionReplyEditorTemplate(ctx context.Context, discussion nostr.RelayEvent, comments []nostr.RelayEvent) string {
-	lines := []string{
-		"# write your reply here.",
-		"# lines starting with '#' are ignored.",
-		"",
-	}
-
-	appender := &lineAppender{lines, "#> "}
-
-	printGitDiscussionMetadata(ctx, appender, discussion, "", false)
-
-	for _, line := range strings.Split(discussion.Content, "\n") {
-		appender.lines = append(appender.lines, "#> "+line)
-	}
-
-	if len(comments) > 0 {
-		appender.lines = append(appender.lines, "#> ", "#> comments:")
-		printGitDiscussionCommentsThreaded(ctx, appender, comments, discussion.ID, false)
-		appender.lines = append(appender.lines, "", "# comment below an existing comment to send yours as a reply to it.")
-	}
-
-	return strings.Join(appender.lines, "\n")
-}
-
-type lineAppender struct {
-	lines  []string
-	prefix string
-}
-
-func (l *lineAppender) Write(b []byte) (int, error) {
-	for _, line := range strings.Split(strings.TrimSuffix(string(b), "\n"), "\n") {
-		line = strings.TrimRight(line, " ")
-		l.lines = append(l.lines, l.prefix+line)
-	}
-	return len(b), nil
-}
-
 func colorizeGitStatus(status string) string {
 	switch status {
 	case "open":

group.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -379,32 +380,235 @@ var group = &cli.Command{
 		},
 		{
 			Name:        "forum",
-			Usage:       "read group forum posts",
-			Description: "access group forum functionality.",
-			ArgsUsage:   "<relay>'<identifier>",
+			Usage:       "forum topic operations",
+			Description: "when called directly, lists forum topics; with an id prefix, displays that topic with threaded comments.",
+			ArgsUsage:   "<relay>'<identifier> [id-prefix]",
 			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)
+				topics, err := fetchGroupForumTopics(ctx, relay, identifier)
+				if err != nil {
+					return err
 				}
-				// TODO: see what to do about this
 
-				return nil
+				prefix := strings.TrimSpace(c.Args().Get(1))
+				if prefix == "" {
+					if len(topics) == 0 {
+						log("no forum topics found\n")
+						return nil
+					}
+
+					wg := sync.WaitGroup{}
+					for _, evt := range topics {
+						wg.Go(func() {
+							sys.FetchProfileMetadata(ctx, evt.PubKey)
+						})
+					}
+					wg.Wait()
+
+					for _, evt := range topics {
+						id := evt.ID.Hex()
+						date := evt.CreatedAt.Time().Format(time.DateOnly)
+						author := authorPreview(ctx, evt.PubKey)
+						subject := forumSubjectPreview(evt, 72)
+						if subject == "" {
+							subject = "<untitled>"
+						}
+						stdout(color.CyanString(id[:6]), color.HiBlackString(date), color.HiBlueString(author), color.HiWhiteString(subject))
+					}
+
+					return nil
+				}
+
+				evt, err := findEventByPrefix(topics, prefix)
+				if err != nil {
+					return err
+				}
+
+				return showThreadWithComments(ctx, []string{relay}, evt, "", nostr.TagMap{"h": []string{identifier}})
+			},
+			Commands: []*cli.Command{
+				{
+					Name:  "create",
+					Usage: "edit and send a forum topic event (kind 11)",
+					Action: func(ctx context.Context, c *cli.Command) error {
+						relay, identifier, err := parseGroupIdentifier(c)
+						if err != nil {
+							return err
+						}
+
+						groupMeta, err := fetchGroupMetadata(ctx, relay, identifier)
+						if err != nil {
+							return err
+						}
+						groupName := groupMeta.Name
+						if groupName == "" {
+							groupName = identifier
+						}
+
+						kr, _, err := gatherKeyerFromArguments(ctx, c)
+						if err != nil {
+							return fmt.Errorf("failed to gather keyer: %w", err)
+						}
+
+						_, selfName, selfNpub, err := keyerIdentity(ctx, kr)
+						if err != nil {
+							return fmt.Errorf("failed to get current identity: %w", err)
+						}
+
+						content, err := editWithDefaultEditor(
+							"nak-group-forum/NOTES_EDITMSG",
+							strings.TrimSpace(fmt.Sprintf(`# creating as '%s' ('%s')
+# creating forum topic in group '%s' ('%s''%s')
+# the first line will be used as the topic title
+topic title here
+
+# the remaining lines will be the body
+write your forum post
+
+# lines starting with '#' are ignored
+`, selfName, selfNpub, groupName, relay, identifier)),
+							true,
+						)
+						if err != nil {
+							return err
+						}
+
+						title, body, err := parseForumCreateContent(content)
+						if err != nil {
+							return err
+						}
+
+						evt := nostr.Event{
+							CreatedAt: nostr.Now(),
+							Kind:      11,
+							Tags: nostr.Tags{
+								nostr.Tag{"h", identifier},
+								nostr.Tag{"title", title},
+							},
+							Content: body,
+						}
+						if err := kr.SignEvent(ctx, &evt); err != nil {
+							return fmt.Errorf("failed to sign forum topic event: %w", err)
+						}
+
+						r, err := sys.Pool.EnsureRelay(relay)
+						if err != nil {
+							return err
+						}
+
+						return r.Publish(ctx, evt)
+					},
+				},
+				{
+					Name:      "comment",
+					Usage:     "comment on a forum topic with a NIP-22 comment event",
+					ArgsUsage: "<relay>'<identifier> <id-prefix>",
+					Action: func(ctx context.Context, c *cli.Command) error {
+						relay, identifier, err := parseGroupIdentifier(c)
+						if err != nil {
+							return err
+						}
+
+						prefix := strings.TrimSpace(c.Args().Get(1))
+						if prefix == "" {
+							return fmt.Errorf("missing forum topic id prefix")
+						}
+
+						kr, _, err := gatherKeyerFromArguments(ctx, c)
+						if err != nil {
+							return fmt.Errorf("failed to gather keyer: %w", err)
+						}
+
+						_, selfName, selfNpub, err := keyerIdentity(ctx, kr)
+						if err != nil {
+							return fmt.Errorf("failed to get current identity: %w", err)
+						}
+
+						topics, err := fetchGroupForumTopics(ctx, relay, identifier)
+						if err != nil {
+							return err
+						}
+
+						topic, err := findEventByPrefix(topics, prefix)
+						if err != nil {
+							return err
+						}
+
+						groupMeta, err := fetchGroupMetadata(ctx, relay, identifier)
+						if err != nil {
+							return err
+						}
+						groupName := groupMeta.Name
+						if groupName == "" {
+							groupName = identifier
+						}
+
+						subject := forumSubjectPreview(topic, 72)
+						if subject == "" {
+							subject = "<untitled>"
+						}
+						pm := sys.FetchProfileMetadata(ctx, topic.PubKey)
+						headerLines := []string{
+							fmt.Sprintf("commenting as '%s' ('%s')", selfName, selfNpub),
+							fmt.Sprintf("commenting on forum topic '%s' '%s' by '%s' ('%s') in group '%s' ('%s''%s')", topic.ID.Hex()[:6], subject, pm.ShortName(), pm.NpubShort(), groupName, relay, identifier),
+						}
+
+						comments, err := fetchThreadComments(ctx, []string{relay}, topic.ID, nostr.TagMap{"h": []string{identifier}})
+						if err != nil {
+							return err
+						}
+
+						edited, err := editWithDefaultEditor(
+							"nak-group-forum-reply/NOTES_EDITMSG",
+							threadReplyEditorTemplate(ctx, headerLines, topic, comments),
+							true,
+						)
+						if err != nil {
+							return err
+						}
+
+						content, parentEvt, err := parseThreadReplyContent(topic, comments, edited)
+						if err != nil {
+							return err
+						}
+
+						rootRelay := relay
+						if topic.Relay.URL != "" {
+							rootRelay = topic.Relay.URL
+						}
+						parentRelay := rootRelay
+						if parentEvt.Relay.URL != "" {
+							parentRelay = parentEvt.Relay.URL
+						}
+
+						evt := nostr.Event{
+							CreatedAt: nostr.Now(),
+							Kind:      1111,
+							Tags: nostr.Tags{
+								nostr.Tag{"E", topic.ID.Hex(), rootRelay},
+								nostr.Tag{"e", parentEvt.ID.Hex(), parentRelay},
+								nostr.Tag{"P", topic.PubKey.Hex()},
+								nostr.Tag{"p", parentEvt.PubKey.Hex()},
+								nostr.Tag{"h", identifier},
+							},
+							Content: content,
+						}
+						if err := kr.SignEvent(ctx, &evt); err != nil {
+							return fmt.Errorf("failed to sign forum comment event: %w", err)
+						}
+
+						r, err := sys.Pool.EnsureRelay(relay)
+						if err != nil {
+							return err
+						}
+
+						return r.Publish(ctx, evt)
+					},
+				},
 			},
 		},
 		{
@@ -747,6 +951,72 @@ func fetchGroupMetadata(ctx context.Context, relay string, identifier string) (n
 	return group, nil
 }
 
+func fetchGroupForumTopics(ctx context.Context, relay string, identifier string) ([]nostr.RelayEvent, error) {
+	topics := make([]nostr.RelayEvent, 0, 30)
+	for ie := range sys.Pool.FetchMany(ctx, []string{relay}, nostr.Filter{
+		Kinds: []nostr.Kind{11},
+		Tags:  nostr.TagMap{"h": []string{identifier}},
+		Limit: 500,
+	}, nostr.SubscriptionOptions{Label: "nak-nip29"}) {
+		topics = append(topics, ie)
+	}
+
+	slices.SortFunc(topics, nostr.CompareRelayEvent)
+	return topics, nil
+}
+
+func forumSubjectPreview(evt nostr.RelayEvent, maxChars int) string {
+	if tag := evt.Tags.Find("title"); len(tag) >= 2 {
+		subject := strings.TrimSpace(tag[1])
+		if subject != "" {
+			return clampWithEllipsis(subject, maxChars)
+		}
+	}
+
+	if tag := evt.Tags.Find("subject"); len(tag) >= 2 {
+		subject := strings.TrimSpace(tag[1])
+		if subject != "" {
+			return clampWithEllipsis(subject, maxChars)
+		}
+	}
+
+	for _, line := range strings.Split(evt.Content, "\n") {
+		line = strings.TrimSpace(line)
+		if line != "" {
+			return clampWithEllipsis(line, maxChars)
+		}
+	}
+
+	return ""
+}
+
+func parseForumCreateContent(content string) (title string, body string, err error) {
+	lines := strings.Split(content, "\n")
+	var bodyb strings.Builder
+
+	for _, line := range lines {
+		line = strings.TrimSpace(line)
+		if strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		if title == "" {
+			title = line
+			continue
+		}
+
+		bodyb.WriteString(line)
+		bodyb.WriteByte('\n')
+	}
+
+	if title == "" {
+		return "", "", fmt.Errorf("topic title cannot be empty")
+	}
+
+	body = strings.TrimSpace(bodyb.String())
+	return title, body, nil
+}
+
 func checkRelayLivekitMetadataSupport(ctx context.Context, relay string) error {
 	url := "http" + nostr.NormalizeURL(relay)[2:] + "/.well-known/nip29/livekit"
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)

thread_helpers.go

@@ -0,0 +1,321 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os"
+	"slices"
+	"strings"
+	"sync"
+	"time"
+
+	"fiatjaf.com/nostr"
+	"fiatjaf.com/nostr/nip22"
+	"github.com/fatih/color"
+)
+
+func fetchThreadComments(ctx context.Context, relays []string, discussionID nostr.ID, extraTags nostr.TagMap) ([]nostr.RelayEvent, error) {
+	filterTags := nostr.TagMap{
+		"E": []string{discussionID.Hex()},
+	}
+	for key, values := range extraTags {
+		filterTags[key] = values
+	}
+
+	comments := make([]nostr.RelayEvent, 0, 15)
+	for ie := range sys.Pool.FetchMany(ctx, relays, nostr.Filter{
+		Kinds: []nostr.Kind{1111},
+		Tags:  filterTags,
+		Limit: 500,
+	}, nostr.SubscriptionOptions{Label: "nak-thread"}) {
+		comments = append(comments, ie)
+	}
+
+	slices.SortFunc(comments, nostr.CompareRelayEvent)
+
+	return comments, nil
+}
+
+func showThreadWithComments(
+	ctx context.Context,
+	relays []string,
+	evt nostr.RelayEvent,
+	status string,
+	extraTags nostr.TagMap,
+) error {
+	comments, err := fetchThreadComments(ctx, relays, evt.ID, extraTags)
+	if err != nil {
+		return err
+	}
+
+	printThreadMetadata(ctx, os.Stdout, evt, status, true)
+	stdout("")
+	stdout(evt.Content)
+
+	if len(comments) > 0 {
+		stdout("")
+		stdout(color.CyanString("comments:"))
+		printThreadedComments(ctx, os.Stdout, comments, evt.ID, true)
+	}
+
+	return nil
+}
+
+func printThreadedComments(
+	ctx context.Context,
+	w io.Writer,
+	comments []nostr.RelayEvent,
+	discussionID nostr.ID,
+	withColor bool,
+) {
+	byID := make(map[nostr.ID]struct{}, len(comments)+1)
+	byID[discussionID] = struct{}{}
+	for _, c := range comments {
+		byID[c.ID] = struct{}{}
+	}
+
+	// preload metadata from everybody
+	wg := sync.WaitGroup{}
+
+	children := make(map[nostr.ID][]nostr.RelayEvent, len(comments)+1)
+	for _, c := range comments {
+		wg.Go(func() {
+			sys.FetchProfileMetadata(ctx, c.PubKey)
+		})
+
+		parent, ok := nip22.GetImmediateParent(c.Event.Tags).(nostr.EventPointer)
+		if !ok {
+			continue
+		}
+		if _, ok := byID[parent.ID]; ok {
+			children[parent.ID] = append(children[parent.ID], c)
+		}
+	}
+
+	for parent := range children {
+		slices.SortFunc(children[parent], nostr.CompareRelayEvent)
+	}
+
+	wg.Wait()
+
+	var render func(parent nostr.ID, depth int)
+	render = func(parent nostr.ID, depth int) {
+		for _, c := range children[parent] {
+			indent := strings.Repeat("  ", depth)
+			author := authorPreview(ctx, c.PubKey)
+			created := c.CreatedAt.Time().Format(time.DateTime)
+
+			if withColor {
+				fmt.Fprintln(w, indent+color.CyanString("["+c.ID.Hex()[0:6]+"]"), color.HiBlueString(author), color.HiBlackString(created))
+			} else {
+				fmt.Fprintln(w, indent+"["+c.ID.Hex()[0:6]+"] "+author+" "+created)
+			}
+
+			for _, line := range strings.Split(c.Content, "\n") {
+				fmt.Fprintln(w, indent+"  "+line)
+			}
+			fmt.Fprintln(w, indent+"")
+
+			render(c.ID, depth+1)
+		}
+	}
+
+	render(discussionID, 0)
+}
+
+func findEventByPrefix(events []nostr.RelayEvent, prefix string) (nostr.RelayEvent, error) {
+	prefix = strings.ToLower(strings.TrimSpace(prefix))
+	if prefix == "" {
+		return nostr.RelayEvent{}, fmt.Errorf("missing event id prefix")
+	}
+
+	matchCount := 0
+	matched := nostr.RelayEvent{}
+	for _, evt := range events {
+		if strings.HasPrefix(evt.ID.Hex(), prefix) {
+			matched = evt
+			matchCount++
+		}
+	}
+
+	if matchCount == 0 {
+		return nostr.RelayEvent{}, fmt.Errorf("no event found with id prefix '%s'", prefix)
+	}
+	if matchCount > 1 {
+		return nostr.RelayEvent{}, fmt.Errorf("id prefix '%s' is ambiguous", prefix)
+	}
+
+	return matched, nil
+}
+
+func printThreadMetadata(
+	ctx context.Context,
+	w io.Writer,
+	evt nostr.RelayEvent,
+	status string,
+	withColors bool,
+) {
+	label := func(s string) string { return s }
+	value := func(s string) string { return s }
+	statusValue := func(s string) string { return s }
+	if withColors {
+		label = func(s string) string { return color.CyanString(s) }
+		value = func(s string) string { return color.HiWhiteString(s) }
+		statusValue = colorizeGitStatus
+	}
+
+	fmt.Fprintln(w, label("id:"), value(evt.ID.Hex()))
+	fmt.Fprintln(w, label("kind:"), value(fmt.Sprintf("%d", evt.Kind.Num())))
+	fmt.Fprintln(w, label("author:"), value(authorPreview(ctx, evt.PubKey)))
+	fmt.Fprintln(w, label("created:"), value(evt.CreatedAt.Time().Format(time.RFC3339)))
+	if status != "" {
+		fmt.Fprintln(w, label("status:"), statusValue(status))
+	}
+	if subject := evt.Tags.Find("subject"); subject != nil && len(subject) >= 2 {
+		fmt.Fprintln(w, label("subject:"), value(subject[1]))
+		fmt.Fprintln(w, "")
+	} else if title := evt.Tags.Find("title"); title != nil && len(title) >= 2 {
+		fmt.Fprintln(w, label("title:"), value(title[1]))
+		fmt.Fprintln(w, "")
+	}
+}
+
+func parseThreadReplyContent(discussion nostr.RelayEvent, comments []nostr.RelayEvent, edited string) (string, nostr.RelayEvent, error) {
+	currentParent := discussion
+	selectedParent := nostr.ZeroID
+	inComments := false
+
+	replyb := strings.Builder{}
+	for _, line := range strings.Split(edited, "\n") {
+		line = strings.TrimSpace(line)
+
+		if strings.HasPrefix(line, "#") && !strings.HasPrefix(line, "#>") {
+			inComments = false
+			currentParent = discussion
+			continue
+		}
+
+		if replyb.Len() == 0 && line == "" {
+			continue
+		}
+
+		if strings.HasPrefix(line, "#>") {
+			quoted := strings.TrimSpace(strings.TrimPrefix(line, "#>"))
+			if quoted == "comments:" {
+				inComments = true
+				currentParent = discussion
+				continue
+			}
+
+			// keep track of which comment the reply body shows up below of
+			// so we can assign it as a reply to that specifically
+			fields := strings.Fields(quoted)
+			if inComments && len(fields) > 0 && fields[0][0] == '[' && fields[0][len(fields[0])-1] == ']' {
+				currId := fields[0][1 : len(fields[0])-1]
+				for _, comment := range comments {
+					if strings.HasPrefix(comment.ID.Hex(), currId) {
+						currentParent = comment
+						break
+					}
+				}
+			}
+
+			continue
+		}
+
+		// if we reach here this is a line for the reply input from the user
+		replyb.WriteString(line)
+		replyb.WriteByte('\n')
+
+		if line == "" {
+			continue
+		}
+
+		if selectedParent != nostr.ZeroID && selectedParent != currentParent.ID {
+			return "", nostr.RelayEvent{}, fmt.Errorf("can only reply to one comment or create a top-level comment, got replies to both %s and %s", selectedParent.Hex()[0:6], currentParent.ID.Hex()[0:6])
+		}
+
+		selectedParent = currentParent.ID
+	}
+
+	content := strings.TrimSpace(replyb.String())
+	if content == "" {
+		return "", nostr.RelayEvent{}, fmt.Errorf("empty reply content, aborting")
+	}
+
+	if selectedParent == nostr.ZeroID || selectedParent == discussion.ID {
+		return content, discussion, nil
+	}
+
+	for _, comment := range comments {
+		if comment.ID == selectedParent {
+			return content, comment, nil
+		}
+	}
+
+	panic("selected reply parent not found (this never happens)")
+}
+
+func threadReplyEditorTemplate(ctx context.Context, headerLines []string, discussion nostr.RelayEvent, comments []nostr.RelayEvent) string {
+	lines := make([]string, 0, len(headerLines)+3)
+	for _, line := range headerLines {
+		if strings.TrimSpace(line) == "" {
+			continue
+		}
+		lines = append(lines, "# "+strings.TrimSpace(line))
+	}
+	lines = append(lines,
+		"# write your reply here.",
+		"# lines starting with '#' are ignored.",
+		"",
+	)
+
+	appender := &lineAppender{lines, "#> "}
+
+	printThreadMetadata(ctx, appender, discussion, "", false)
+
+	for _, line := range strings.Split(discussion.Content, "\n") {
+		appender.lines = append(appender.lines, "#> "+line)
+	}
+
+	if len(comments) > 0 {
+		appender.lines = append(appender.lines, "#> ", "#> comments:")
+		printThreadedComments(ctx, appender, comments, discussion.ID, false)
+		appender.lines = append(appender.lines, "", "# comment below an existing comment to send yours as a reply to it.")
+	}
+
+	return strings.Join(appender.lines, "\n")
+}
+
+func keyerIdentity(ctx context.Context, kr nostr.Keyer) (nostr.PubKey, string, string, error) {
+	pk, err := kr.GetPublicKey(ctx)
+	if err != nil {
+		return nostr.ZeroPK, "", "", err
+	}
+
+	meta := sys.FetchProfileMetadata(ctx, pk)
+	return pk, meta.ShortName(), meta.NpubShort(), nil
+}
+
+func authorPreview(ctx context.Context, pubkey nostr.PubKey) string {
+	meta := sys.FetchProfileMetadata(ctx, pubkey)
+	if meta.Name != "" {
+		return meta.ShortName() + " (" + meta.NpubShort() + ")"
+	}
+	return meta.NpubShort()
+}
+
+type lineAppender struct {
+	lines  []string
+	prefix string
+}
+
+func (l *lineAppender) Write(b []byte) (int, error) {
+	for _, line := range strings.Split(strings.TrimSuffix(string(b), "\n"), "\n") {
+		line = strings.TrimRight(line, " ")
+		l.lines = append(l.lines, l.prefix+line)
+	}
+
+	return len(b), nil
+}