Add support for Highlight (kind:9802)

clients.go

@@ -110,6 +110,12 @@ func generateClientList(
 			amethyst,
 			snort, coracle, nostrudel,
 		}
+	case 9802:
+		clients = []ClientReference{
+			highlighter,
+			coracle,
+			nostrudel,
+		}
 	case 30311:
 		clients = []ClientReference{
 			native,

data.go

@@ -3,7 +3,9 @@ package main
 import (
 	"context"
 	"fmt"
+	"html"
 	"html/template"
+	"strconv"
 	"strings"
 	"time"
 
@@ -37,6 +39,7 @@ type Data struct {
 	kind30311Metadata        *Kind30311Metadata
 	kind31922Or31923Metadata *Kind31922Or31923Metadata
 	Kind30818Metadata        Kind30818Metadata
+	Kind9802Metadata         Kind9802Metadata
 }
 
 func grabData(ctx context.Context, code string, withRelays bool) (Data, error) {
@@ -129,6 +132,58 @@ func grabData(ctx context.Context, code string, withRelays bool) (Data, error) {
 			return ""
 		}()
 		data.content = event.Content
+	case 9802:
+		data.templateId = Highlight
+		data.content = event.Content
+		if author := event.Tags.Find("p"); author != nil {
+			ctx, cancel := context.WithTimeout(ctx, time.Second*3)
+			defer cancel()
+			data.Kind9802Metadata.Author = sys.FetchProfileMetadata(ctx, author[1])
+		}
+		if sourceEvent := event.Tags.Find("e"); sourceEvent != nil {
+			data.Kind9802Metadata.SourceEvent = sourceEvent[1]
+			data.Kind9802Metadata.SourceName = "#" + shortenString(sourceEvent[1], 8, 4)
+		} else if sourceEvent := event.Tags.Find("a"); sourceEvent != nil {
+			spl := strings.Split(sourceEvent[1], ":")
+			kind, _ := strconv.Atoi(spl[0])
+			var relayHints []string
+			if len(sourceEvent) > 2 {
+				relayHints = []string{sourceEvent[2]}
+			}
+			naddr, _ := nip19.EncodeEntity(spl[1], kind, spl[2], relayHints)
+			data.Kind9802Metadata.SourceEvent = naddr
+
+			sourceEvent, _, _ := getEvent(ctx, naddr, withRelays)
+			if title := sourceEvent.Tags.Find("title"); title != nil {
+				data.Kind9802Metadata.SourceName = title[1]
+			} else {
+				data.Kind9802Metadata.SourceName = "#" + shortenString(naddr, 8, 4)
+			}
+		} else if sourceUrl := event.Tags.Find("r"); sourceUrl != nil {
+			data.Kind9802Metadata.SourceURL = sourceUrl[1]
+			data.Kind9802Metadata.SourceName = sourceUrl[1]
+		}
+		if context := event.Tags.Find("context"); context != nil {
+			data.Kind9802Metadata.Context = context[1]
+
+			escapedContext := html.EscapeString(context[1])
+			escapedCitation := html.EscapeString(data.content)
+
+			// Some clients mistakenly put the highlight in the context
+			if escapedContext != escapedCitation {
+				// Replace the citation with the marked version
+				data.Kind9802Metadata.MarkedContext = strings.Replace(
+					escapedContext,
+					escapedCitation,
+					fmt.Sprintf("<span class=\"bg-amber-100 dark:bg-amber-700\">%s</span>", escapedCitation),
+					-1, // Replace all occurrences
+				)
+			}
+		}
+		if comment := event.Tags.Find("comment"); comment != nil {
+			data.Kind9802Metadata.Comment = basicFormatting(comment[1], false, false, false)
+		}
+
 	default:
 		data.templateId = Other
 	}

highlight.templ

@@ -0,0 +1,69 @@
+package main
+
+import "html/template"
+
+type HighlightPageParams struct {
+	BaseEventPageParams
+	OpenGraphParams
+	HeadParams
+
+	Details        DetailsParams
+	Content        template.HTML
+	HighlightEvent Kind9802Metadata
+	Clients        []ClientReference
+}
+
+templ highlightInnerBlock(params HighlightPageParams) {
+	<h1 class="text-2xl" itemprop="headline">Highlight</h1>
+	<div itemprop="articleBody">
+		if params.HighlightEvent.Comment != "" {
+			<div dir="auto" class="leading-6">
+				@templ.Raw(params.HighlightEvent.Comment)
+			</div>
+		}
+		<blockquote dir="auto" class="text-xl leading-7">
+			if params.HighlightEvent.MarkedContext != "" {
+				@templ.Raw(params.HighlightEvent.MarkedContext)
+			} else {
+				@templ.Raw(params.Content)
+			}
+			<footer class="text-base mt-4">
+				—
+				if params.HighlightEvent.Author.Name != "" {
+					{ params.HighlightEvent.Author.Name + "," }
+				}
+				<cite>
+					if params.HighlightEvent.SourceURL != "" {
+						<a href={ templ.SafeURL(params.HighlightEvent.SourceURL) }>{ params.HighlightEvent.SourceName }</a>
+					}
+					if params.HighlightEvent.SourceEvent != "" {
+						<a href={ templ.SafeURL("/" + params.HighlightEvent.SourceEvent) }>{ params.HighlightEvent.SourceName }</a>
+					}
+				</cite>
+			</footer>
+		</blockquote>
+	</div>
+}
+
+templ highlightTemplate(params HighlightPageParams, isEmbed bool) {
+	<!DOCTYPE html>
+	if isEmbed {
+		@embeddedPageTemplate(
+			params.Event,
+			params.NeventNaked,
+		) {
+			@highlightInnerBlock(params)
+		}
+	} else {
+		@eventPageTemplate(
+			"Highlight",
+			params.OpenGraphParams,
+			params.HeadParams,
+			params.Clients,
+			params.Details,
+			params.Event,
+		) {
+			@highlightInnerBlock(params)
+		}
+	}
+}

pages.go

@@ -24,6 +24,7 @@ const (
 	LiveEventMessage
 	CalendarEvent
 	WikiEvent
+	Highlight
 	Other
 )
 

render_event.go

@@ -564,6 +564,25 @@ func renderEvent(w http.ResponseWriter, r *http.Request) {
 
 		component = wikiEventTemplate(params, isEmbed)
 
+	case Highlight:
+		content := data.content
+
+		params := HighlightPageParams{
+			BaseEventPageParams: baseEventPageParams,
+			OpenGraphParams:     opengraph,
+			HeadParams: HeadParams{
+				IsProfile:   false,
+				NaddrNaked:  data.naddrNaked,
+				NeventNaked: data.neventNaked,
+			},
+			Content:        template.HTML(content),
+			HighlightEvent: data.Kind9802Metadata,
+			Details:        detailsData,
+			Clients:        generateClientList(data.event.Kind, data.nevent),
+		}
+
+		component = highlightTemplate(params, isEmbed)
+
 	case Other:
 		detailsData.HideDetails = false // always open this since we know nothing else about the event
 

template_types.go

@@ -35,3 +35,13 @@ type Kind30818Metadata struct {
 	Summary     string
 	PublishedAt time.Time
 }
+
+type Kind9802Metadata struct {
+	Author        sdk.ProfileMetadata
+	SourceEvent   string
+	SourceURL     string
+	SourceName    string
+	Context       string
+	MarkedContext string
+	Comment       string
+}

utils.go

@@ -67,6 +67,7 @@ var kindNames = map[int]string{
 	1984:  "Reporting",
 	9734:  "Zap Request",
 	9735:  "Zap",
+	9802:  "Highlight",
 	10000: "Mute List",
 	10001: "Pin List",
 	10002: "Relay List Metadata",
@@ -107,6 +108,7 @@ var kindNIPs = map[int]string{
 	1984:  "56",
 	9734:  "57",
 	9735:  "57",
+	9802:  "84",
 	10000: "51",
 	10001: "51",
 	10002: "65",
@@ -254,6 +256,12 @@ func shortenNostrURLs(input string) string {
 	})
 }
 
+func shortenString(input string, before int, after int) string {
+	firstChars := input[:before]
+	lastChars := input[len(input)-after:]
+	return firstChars + "…" + lastChars
+}
+
 func getNameFromNip19(ctx context.Context, nip19code string) (string, bool) {
 	metadata, _ := sys.FetchProfileFromInput(ctx, nip19code)
 	if metadata.Name == "" {