additional work on reading posts - still not quite there yet but getting closer

communityadmin.go

@@ -11,6 +11,7 @@
 package main
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"net/http"
@@ -334,12 +335,12 @@ func EditCommunityLogo(ctxt ui.AmContext) (string, any, error) {
 			}
 			defer func() {
 				if happy {
-					go func() {
+					ampool.Submit(func(context.Context) {
 						err := database.AmDeleteImage(int32(id))
 						if err != nil {
 							log.Errorf("unable to delete image ID %d: %v", id, err)
 						}
-					}()
+					})
 				}
 			}()
 		}

conference.go

@@ -11,6 +11,7 @@
 package main
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"io"
@@ -324,24 +325,61 @@ func AttachmentUpload(ctxt ui.AmContext) (string, any, error) {
 	return ui.ErrorPage(ctxt, errors.New("invalid button clicked on form"))
 }
 
+func breakRange(topic *database.Topic, into []int32, param string, sep string) error {
+	rstr := strings.Split(param, sep)
+	if len(rstr) == 0 {
+		return fmt.Errorf("posts not found: %s in topic %d", param, topic.Number)
+	}
+	v, err := strconv.ParseInt(rstr[0], 10, 32)
+	if err != nil {
+		return fmt.Errorf("posts not found: %s in topic %d", param, topic.Number)
+	}
+	into[0] = int32(v)
+	if len(rstr) > 1 {
+		v, err = strconv.ParseInt(rstr[1], 10, 32)
+		if err != nil {
+			return fmt.Errorf("posts not found: %s in topic %d", param, topic.Number)
+		}
+		into[1] = int32(v)
+	} else {
+		into[1] = into[0]
+	}
+	if into[1] < 0 {
+		into[1] = topic.TopMessage
+	}
+	if into[0] > into[1] {
+		t := into[0]
+		into[0] = into[1]
+		into[1] = t
+	}
+	into[0] = max(into[0], 0)
+	into[1] = min(into[1], topic.TopMessage)
+	return nil
+}
+
 func ReadPosts(ctxt ui.AmContext) (string, any, error) {
-	// If we need to reset a topic's last read count (as with "Next & Keep New"), spin the task off into a goroutine.
+	// If we need to reset a topic's last read count (as with "Next & Keep New"), spin the task off.
 	if ctxt.HasParameter("rst") {
 		rst := strings.Split(ctxt.Parameter("rst"), ",")
 		if len(rst) >= 2 {
-			topicId, e1 := strconv.ParseInt(rst[0], 10, 32)
+			user := ctxt.CurrentUser()
-			lastRead, e2 := strconv.ParseInt(rst[1], 10, 32)
+			ampool.Submit(func(context.Context) {
-			if e1 == nil && e2 == nil {
+				topicId, e1 := strconv.ParseInt(rst[0], 10, 32)
-				user := ctxt.CurrentUser()
+				lastRead, e2 := strconv.ParseInt(rst[1], 10, 32)
-				go func() {
+				if e1 == nil && e2 == nil {
 					topic, _ := database.AmGetTopic(int32(topicId))
 					if topic != nil {
 						topic.SetLastRead(user, int32(lastRead))
 					}
-				}()
+				}
-			}
+			})
 		}
 	}
+	// Get user prefs.
+	prefs, err := ctxt.CurrentUser().Prefs()
+	if err != nil {
+		return ui.ErrorPage(ctxt, err)
+	}
 	// Locate community, conference, and topic.
 	comm := ctxt.CurrentCommunity()
 	conf := ctxt.GetScratch("currentConference").(*database.Conference)
@@ -355,44 +393,25 @@ func ReadPosts(ctxt ui.AmContext) (string, any, error) {
 	}
 
 	// Determine the range of posts to display.  The "pin" is the post number after which we display the horizontal line separating old and new posts.
+	lastRead, err := topic.GetLastRead(ctxt.CurrentUser())
+	if err != nil {
+		ctxt.SetRC(http.StatusNotFound)
+		return ui.ErrorPage(ctxt, fmt.Errorf("posts not found in topic %d - %v", topic.Number, err))
+	}
 	postRange := make([]int32, 2)
 	var pin int32 = -1
+	resetLastRead := false
 	if ctxt.HasParameter("r") {
-		rstr := strings.Split(ctxt.Parameter("r"), ",")
+		if err := breakRange(topic, postRange, ctxt.Parameter("r"), ","); err != nil {
-		if len(rstr) == 0 {
 			ctxt.SetRC(http.StatusNotFound)
-			return ui.ErrorPage(ctxt, fmt.Errorf("posts not found: %s in topic %d", ctxt.Parameter("r"), topic.Number))
+			return ui.ErrorPage(ctxt, err)
 		}
-		v, err := strconv.ParseInt(rstr[0], 10, 32)
+	} else if ctxt.HasParameter("rgo") {
-		if err != nil {
+		if err := breakRange(topic, postRange, ctxt.Parameter("rgo"), "-"); err != nil {
 			ctxt.SetRC(http.StatusNotFound)
-			return ui.ErrorPage(ctxt, fmt.Errorf("posts not found: %s in topic %d", ctxt.Parameter("r"), topic.Number))
+			return ui.ErrorPage(ctxt, err)
-		}
-		postRange[0] = int32(v)
-		if len(rstr) > 1 {
-			v, err = strconv.ParseInt(rstr[1], 10, 32)
-			if err != nil {
-				ctxt.SetRC(http.StatusNotFound)
-				return ui.ErrorPage(ctxt, fmt.Errorf("posts not found: %s in topic %d", ctxt.Parameter("r"), topic.Number))
-			}
-			postRange[1] = int32(v)
-		} else {
-			postRange[1] = postRange[0]
-		}
-		if postRange[1] < 0 {
-			postRange[1] = topic.TopMessage
-		}
-		if postRange[0] > postRange[1] {
-			t := postRange[0]
-			postRange[0] = postRange[1]
-			postRange[1] = t
 		}
 	} else {
-		lastRead, err := topic.GetLastRead(ctxt.CurrentUser())
-		if err != nil {
-			ctxt.SetRC(http.StatusNotFound)
-			return ui.ErrorPage(ctxt, fmt.Errorf("posts not found in topic %d - %v", topic.Number, err))
-		}
 		postRange[0] = lastRead + 1
 		postRange[1] = topic.TopMessage
 		count := postRange[1] - postRange[0] + 1
@@ -400,11 +419,49 @@ func ReadPosts(ctxt ui.AmContext) (string, any, error) {
 			postRange[0] = postRange[1] - ctxt.Globals().PostsPerPage + 1
 		} else if count < ctxt.Globals().PostsPerPage {
 			pin = postRange[0] - 1
-			postRange[0] -= ctxt.Globals().OldPostsAtTop
+			postRange[0] = max(0, postRange[0]-ctxt.Globals().OldPostsAtTop)
-			postRange[0] = max(0, postRange[0])
 			if pin < postRange[0] {
 				pin = -1
 			}
 		}
+		resetLastRead = true
 	}
+
+	// Load the actual posts.
+	posts, err := database.AmGetPostRange(topic, postRange[0], postRange[1])
+	if err != nil {
+		return ui.ErrorPage(ctxt, fmt.Errorf("internal error getting posts <%d:%d-%d> - %v", topic.Number, postRange[0], postRange[1], err))
+	}
+
+	// Determine other required data.
+	loc := prefs.Localizer()
+	summaryLine := fmt.Sprintf("%d Total; %d New; Last: %s", topic.TopMessage+1, topic.TopMessage-lastRead, loc.Strftime("%b %e, %Y %r", topic.LastUpdate))
+	plc := database.AmCreatePostLinkContext(comm.Alias, ctxt.GetScratch("currentAlias").(string), topic.Number)
+	topicPostRef := plc.AsString()
+	plc.FirstPost = postRange[0]
+	plc.LastPost = postRange[1]
+	postsPostRef := plc.AsString()
+
+	// Render the output.
+	ctxt.VarMap().Set("stem", fmt.Sprintf("/comm/%s/conf/%s", comm.Alias, ctxt.GetScratch("currentAlias").(string)))
+	ctxt.VarMap().Set("topicName", topic.Name)
+	ctxt.VarMap().Set("summaryLine", summaryLine)
+	ctxt.VarMap().Set("lastRead", lastRead)
+	ctxt.VarMap().Set("pageSize", ctxt.Globals().PostsPerPage)
+	ctxt.VarMap().Set("post_max", topic.TopMessage)
+	ctxt.VarMap().Set("posts", posts)
+	ctxt.VarMap().Set("postsPermalink", fmt.Sprintf("/go/%s", postsPostRef))
+	ctxt.VarMap().Set("pin", pin)
+	ctxt.VarMap().Set("rangeEnd", postRange[1])
+	ctxt.VarMap().Set("rangeStart", postRange[0])
+	ctxt.VarMap().Set("topicNum", topic.Number)
+	ctxt.VarMap().Set("topicPermalink", fmt.Sprintf("/go/%s", topicPostRef))
+	ctxt.VarMap().Set("amsterdam_pageTitle", fmt.Sprintf("%s: %s", topic.Name, summaryLine))
+	if resetLastRead {
+		user := ctxt.CurrentUser()
+		ampool.Submit(func(context.Context) {
+			topic.SetLastRead(user, topic.TopMessage)
+		})
+	}
+	return "framed_template", "posts.jet", nil
 }

database/post.go

@@ -49,3 +49,12 @@ func AmGetPost(postId int64) (*PostHeader, error) {
 	}
 	return &(dbdata[0]), nil
 }
+
+func AmGetPostRange(topic *Topic, first, last int32) ([]PostHeader, error) {
+	var rc []PostHeader
+	err := amdb.Select(&rc, "SELECT * FROM posts WHERE topicid = ? AND num >= ? AND num <= ? ORDER BY num", topic.TopicId, first, last)
+	if err != nil {
+		return nil, err
+	}
+	return rc, nil
+}

database/post_link.go

@@ -11,6 +11,7 @@ package database
 
 import (
 	"errors"
+	"fmt"
 	"math"
 	"strconv"
 	"strings"
@@ -53,6 +54,43 @@ func (d *PostLinkData) VerifyNames() error {
 	return nil
 }
 
+// AsString converts the post link data to a string reference.
+func (d *PostLinkData) AsString() string {
+	var b strings.Builder
+	if d.Community != "" {
+		b.WriteString(d.Community)
+		b.WriteString("!")
+	}
+	wrote := false
+	if d.Conference != "" {
+		b.WriteString(d.Conference)
+		b.WriteString(".")
+		wrote = true
+	}
+	needDot := false
+	if d.Topic > 0 {
+		needDot = true
+		b.WriteString(fmt.Sprintf("%d", d.Topic))
+		if !wrote {
+			b.WriteString(".")
+			needDot = false
+		}
+	}
+	if d.FirstPost >= 0 {
+		s := ""
+		if d.LastPost < 0 || d.LastPost == d.FirstPost {
+			s = fmt.Sprintf("%d", d.FirstPost)
+		} else {
+			s = fmt.Sprintf("%d-%d", d.FirstPost, d.LastPost)
+		}
+		if needDot {
+			b.WriteString(".")
+		}
+		b.WriteString(s)
+	}
+	return b.String()
+}
+
 // Maximum lengths of the components.
 const (
 	maxLinkLength       = 130

main.go

@@ -23,6 +23,7 @@ import (
 	"git.erbosoft.com/amy/amsterdam/email"
 	"git.erbosoft.com/amy/amsterdam/htmlcheck"
 	"git.erbosoft.com/amy/amsterdam/ui"
+	"git.erbosoft.com/amy/amsterdam/util"
 	"github.com/labstack/echo-contrib/session"
 	"github.com/labstack/echo/v4"
 	"github.com/labstack/echo/v4/middleware"
@@ -102,6 +103,9 @@ func setupEcho() *echo.Echo {
 	return e
 }
 
+// ampool is the worker pool for one-shot background tasks.
+var ampool *util.WorkerPool
+
 // main is Ye Olde Main Function.
 func main() {
 	// Configure the system.
@@ -127,6 +131,13 @@ func main() {
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
 	defer stop()
 
+	// Set up ampool.
+	ampool = util.AmNewPool(ctx, 4, 128)
+	go func() {
+		<-ctx.Done()
+		ampool.Shutdown()
+	}()
+
 	// Start server
 	go func() {
 		if err := e.Start(":1323"); err != nil && err != http.ErrServerClosed {

ui/amcontext.go

@@ -12,6 +12,7 @@ package ui
 
 import (
 	"bytes"
+	"context"
 	"fmt"
 	"mime/multipart"
 	"net/http"
@@ -38,6 +39,7 @@ type AmContext interface {
 	ClearCommunityContext()
 	ClearLoginCookie()
 	ClearSession()
+	Ctx() context.Context
 	CurrentCommunity() *database.Community
 	CurrentUser() *database.User
 	CurrentUserId() int32
@@ -123,6 +125,11 @@ func (c *amContext) ClearSession() {
 	c.effectiveLevel = 0
 }
 
+// Ctx returns the current context.Context for the request.
+func (c *amContext) Ctx() context.Context {
+	return c.echoContext.Request().Context()
+}
+
 // CurrentCommunity returns the current community, if one's been set.
 func (c *amContext) CurrentCommunity() *database.Community {
 	if c.community == nil {
@@ -213,11 +220,9 @@ func (c *amContext) HasParameter(name string) bool {
 	if s != "" {
 		return true
 	}
-	if c.echoContext.Request().Method == "POST" {
+	s = c.echoContext.FormValue(name)
-		s = c.echoContext.FormValue(name)
+	if s != "" {
-		if s != "" {
+		return true
-			return true
-		}
 	}
 	return false
 }
@@ -255,7 +260,7 @@ func (c *amContext) OutputType() string {
  */
 func (c *amContext) Parameter(name string) string {
 	rc := c.echoContext.QueryParam(name)
-	if rc == "" && c.echoContext.Request().Method == "POST" {
+	if rc == "" {
 		rc = c.echoContext.FormValue(name)
 	}
 	return rc

ui/middleware.go

@@ -135,6 +135,7 @@ func SetConference(next echo.HandlerFunc) echo.HandlerFunc {
 			myLevel = lvl
 		}
 		ctxt.SetScratch("currentConference", conf)
+		ctxt.SetScratch("currentAlias", ctxt.URLParam("confid"))
 		ctxt.SetScratch("levelInConference", myLevel)
 		return next(c)
 	}

ui/views/posts.jet

@@ -18,7 +18,7 @@
         <!-- Topic Controls -->
         <div class="flex justify-between items-center mb-4 gap-2 flex-wrap">
             <div class="flex gap-2 flex-wrap">
-                <a href="/TODO" 
+                <a href="{{ stem }}" 
                     class="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded text-sm font-medium transition-colors">Topic List</a>
                 <a href="/TODO" 
                     class="bg-gray-600 hover:bg-gray-700 text-white px-4 py-2 rounded text-sm font-medium transition-colors">Hide Topic</a>
@@ -41,17 +41,24 @@
 
         <!-- Navigation Bar -->
         <div class="flex justify-between items-center mb-4">
-            <form method="GET" action="/TODO" class="flex items-center gap-2">
+            <form method="GET" action="{{ stem }}/r/{{ topicNum }}" class="flex items-center gap-2">
-                <input type="hidden" name="cc" value="2">
+                <input type="text" name="rgo" value="" size="6" maxlength="13" placeholder="Go to..." 
-                <input type="hidden" name="conf" value="2">
-                <input type="hidden" name="top" value="4">
-                <input type="text" name="pxg" value="" size="6" maxlength="13" placeholder="Go to..." 
                         class="px-3 py-2 border border-gray-300 rounded font-mono text-sm focus:outline-none focus:ring-2 focus:ring-blue-500">
                 <button type="submit" name="go" class="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded text-sm font-medium transition-colors">Go</button>
             </form>
             <div class="flex items-center gap-2 text-sm">
                 <span>[</span>
-                <a href="/TODO" class="text-blue-700 hover:text-blue-900">View All</a>
+                <a href="{{ stem }}/r/{{ topicNum }}?r=0,-1" class="text-blue-700 hover:text-blue-900">View All</a>
+                {{ if rangeStart > 0 }}
+                    <span>|</span>
+                    <a href="{{ stem }}/r/{{ topicNum }}?r={{ rangeStart - pageSize - 1 }},{{ rangeStart - 1 }}" class="text-blue-700 hover:text-blue-900 mx-2">Scroll Up {{ pageSize }}</a>
+                {{ end }}
+                {{ if rangeEnd < post_max }}
+                    <span>|</span>
+                    <a href="{{ stem }}/r/{{ topicNum }}?r={{ rangeEnd + 1 }},{{ rangeEnd + pageSize + 1 }}" class="text-blue-700 hover:text-blue-900 mx-2">Scroll Down {{ pageSize }}</a>
+                    <span>|</span>
+                    <a href="{{ stem }}/r/{{ topicNum }}?r={{ post_max - pageSize - 1 }},{{ post_max }}" class="text-blue-700 hover:text-blue-900 mx-2">Scroll To End</a>
+                {{ end }}
                 <span>|</span>
                 <a href="#bottom" class="text-blue-700 hover:text-blue-900">Bottom</a>
                 <span>]</span>
@@ -67,105 +74,26 @@
 
         <!-- Messages -->
         <div class="space-y-6 mb-8">
-            <!-- Post 0 -->
+            {{ range i, p := posts }}
-            <div class="border-2 border-gray-300 rounded-lg p-4 bg-white">
+                {{ .SubRender("singlepost.jet") | raw }}
-                <div class="flex justify-between items-start mb-3">
+                {{ if pin == p.Num }}<hr/>{{ end }}
-                    <div class="text-sm text-gray-600">
+            {{ end }}
-                        <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=0" class="text-blue-700 hover:text-blue-900 font-mono">0</a> of 
-                        <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=3" class="text-blue-700 hover:text-blue-900 font-mono">3</a>
-                        <span class="ml-2 text-xs">&lt;General.4.0&gt;</span>
-                        <a href="http://necrovenice:8080/venice/go/Piazza!General.4.0" class="ml-2 text-xs text-blue-700 hover:text-blue-900">[Permalink]</a>
-                    </div>
-                </div>
-                <div class="mb-2">
-                    <strong class="text-lg">The first one</strong>
-                    <span class="text-gray-600 text-sm ml-2">(<em>
-                        <a href="http://necrovenice:8080/venice/user/Administrator" target="_blank" class="text-blue-700 hover:text-blue-900">Administrator</a>, 
-                        Nov 20, 2025 10:47:17 PM</em>)
-                    </span>
-                </div>
-                <pre class="font-mono text-sm whitespace-pre-wrap bg-gray-50 p-4 rounded border border-gray-200">This is a test.
-This is <em>only</em> a test.
-If this had been an actual emergency, we would all be 
-dead by now.</pre>
-            </div>
-
-            <!-- Post 1 -->
-            <div class="border-2 border-gray-300 rounded-lg p-4 bg-white">
-                <div class="flex justify-between items-start mb-3">
-                    <div class="text-sm text-gray-600">
-                        <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=1" class="text-blue-700 hover:text-blue-900 font-mono">1</a> of 
-                        <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=3" class="text-blue-700 hover:text-blue-900 font-mono">3</a>
-                        <span class="ml-2 text-xs">&lt;General.4.1&gt;</span>
-                        <a href="http://necrovenice:8080/venice/go/Piazza!General.4.1" class="ml-2 text-xs text-blue-700 hover:text-blue-900">[Permalink]</a>
-                    </div>
-                </div>
-                <div class="mb-2">
-                    <strong class="text-lg">Sample text is here</strong>
-                    <span class="text-gray-600 text-sm ml-2">(<em>
-                        <a href="http://necrovenice:8080/venice/user/Administrator" target="_blank" class="text-blue-700 hover:text-blue-900">Administrator</a>, 
-                        Nov 20, 2025 10:48:21 PM</em>)
-                    </span>
-                </div>
-                <pre class="font-mono text-sm whitespace-pre-wrap bg-gray-50 p-4 rounded border border-gray-200">Lorem ipsum dolor sit amet, consectetur adipiscing elit.
-Nulla maximus, quam sit amet dictum tristique, mi nibh 
-tempor dolor, pretium finibus purus nunc nec mauris. In
-hendrerit a erat at sodales. Fusce dictum metus id 
-augue interdum dapibus. Mauris maximus elementum arcu 
-eu ultricies. Nullam mollis lorem ac ipsum accumsan 
-tincidunt. Proin gravida nibh fringilla tellus gravida,
-viverra pellentesque metus luctus. Vivamus quis pretium
-magna...</pre>
-            </div>
-
-            <!-- Post 2 - Truncated for space -->
-            <div class="border-2 border-gray-300 rounded-lg p-4 bg-white">
-                <div class="flex justify-between items-start mb-3">
-                    <div class="text-sm text-gray-600">
-                        <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=2" class="text-blue-700 hover:text-blue-900 font-mono">2</a> of 
-                        <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=3" class="text-blue-700 hover:text-blue-900 font-mono">3</a>
-                        <span class="ml-2 text-xs">&lt;General.4.2&gt;</span>
-                        <a href="http://necrovenice:8080/venice/go/Piazza!General.4.2" class="ml-2 text-xs text-blue-700 hover:text-blue-900">[Permalink]</a>
-                    </div>
-                </div>
-                <div class="mb-2">
-                    <strong class="text-lg">Reposted Tiedrich</strong>
-                    <span class="text-gray-600 text-sm ml-2">(<em>
-                        <a href="http://necrovenice:8080/venice/user/Administrator" target="_blank" class="text-blue-700 hover:text-blue-900">Administrator</a>, 
-                        Nov 20, 2025 10:57:04 PM</em>)
-                    </span>
-                </div>
-                <div class="font-mono text-sm whitespace-pre-wrap bg-gray-50 p-4 rounded border border-gray-200">
-                    <h3 class="font-bold mb-2">friday: the further adventures of some fucking idiot</h3>
-                    <div>[Content with HTML links preserved]</div>
-                </div>
-            </div>
-
-            <!-- Post 3 -->
-            <div class="border-2 border-gray-300 rounded-lg p-4 bg-white" id="bottom">
-                <div class="flex justify-between items-start mb-3">
-                    <div class="text-sm text-gray-600">
-                        <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=3" class="text-blue-700 hover:text-blue-900 font-mono">3</a> of 
-                        <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=3" class="text-blue-700 hover:text-blue-900 font-mono">3</a>
-                        <span class="ml-2 text-xs">&lt;General.4.3&gt;</span>
-                        <a href="http://necrovenice:8080/venice/go/Piazza!General.4.3" class="ml-2 text-xs text-blue-700 hover:text-blue-900">[Permalink]</a>
-                    </div>
-                </div>
-                <div class="mb-2">
-                    <strong class="text-lg">Look</strong>
-                    <span class="text-gray-600 text-sm ml-2">(<em>
-                        <a href="http://necrovenice:8080/venice/user/Administrator" target="_blank" class="text-blue-700 hover:text-blue-900">Administrator</a>, 
-                        Nov 20, 2025 10:57:33 PM</em>)
-                    </span>
-                </div>
-                <pre class="font-mono text-sm whitespace-pre-wrap bg-gray-50 p-4 rounded border border-gray-200">Let's not worry about all this.</pre>
-            </div>
         </div>
 
         <!-- Bottom Navigation -->
         <div class="flex justify-end items-center mb-6 text-sm">
             <span>[</span>
-            <a href="/TODO" class="text-blue-700 hover:text-blue-900 mx-2">View All</a>
+            <a href="{{ stem }}/r/{{ topicNum }}?r=0,-1" class="text-blue-700 hover:text-blue-900 mx-2">View All</a>
+            {{ if rangeStart > 0 }}
+                <span>|</span>
+                <a href="{{ stem }}/r/{{ topicNum }}?r={{ rangeStart - pageSize - 1 }},{{ rangeStart - 1 }}" class="text-blue-700 hover:text-blue-900 mx-2">Scroll Up {{ pageSize }}</a>
+            {{ end }}
+            {{ if rangeEnd < post_max }}
+                <span>|</span>
+                <a href="{{ stem }}/r/{{ topicNum }}?r={{ rangeEnd + 1 }},{{ rangeEnd + pageSize + 1 }}" class="text-blue-700 hover:text-blue-900 mx-2">Scroll Down {{ pageSize }}</a>
+                <span>|</span>
+                <a href="{{ stem }}/r/{{ topicNum }}?r={{ post_max - pageSize - 1 }},{{ post_max }}" class="text-blue-700 hover:text-blue-900 mx-2">Scroll To End</a>
+            {{ end }}
             <span>|</span>
             <a href="#top" class="text-blue-700 hover:text-blue-900 mx-2">Top</a>
             <span>]</span>

ui/views/singlepost.jet

@@ -0,0 +1,29 @@
+{*
+ * Amsterdam Web Communities System
+ * Copyright (c) 2025 Erbosoft Metaverse Design Solutions, All Rights Reserved
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *}
+<div class="border-2 border-gray-300 rounded-lg p-4 bg-white">
+    <div class="flex justify-between items-start mb-3">
+        <div class="text-sm text-gray-600">
+            <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=0" class="text-blue-700 hover:text-blue-900 font-mono">0</a> of 
+            <a href="http://necrovenice:8080/venice/conf/posts.js.vs?cc=2&conf=2&top=4&shac=1&p1=3" class="text-blue-700 hover:text-blue-900 font-mono">3</a>
+            <span class="ml-2 text-xs">&lt;General.4.0&gt;</span>
+            <a href="http://necrovenice:8080/venice/go/Piazza!General.4.0" class="ml-2 text-xs text-blue-700 hover:text-blue-900">[Permalink]</a>
+        </div>
+    </div>
+    <div class="mb-2">
+        <strong class="text-lg">The first one</strong>
+        <span class="text-gray-600 text-sm ml-2">(<em>
+            <a href="http://necrovenice:8080/venice/user/Administrator" target="_blank" class="text-blue-700 hover:text-blue-900">Administrator</a>, 
+            Nov 20, 2025 10:47:17 PM</em>)
+        </span>
+    </div>
+    <pre class="font-mono text-sm whitespace-pre-wrap bg-gray-50 p-4 rounded border border-gray-200">This is a test.
+This is <em>only</em> a test.
+If this had been an actual emergency, we would all be 
+dead by now.</pre>
+</div>

userdata.go

@@ -10,6 +10,7 @@
 package main
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"net/http"
@@ -298,12 +299,12 @@ func ProfilePhoto(ctxt ui.AmContext) (string, any, error) {
 			}
 			defer func() {
 				if happy {
-					go func() {
+					ampool.Submit(func(context.Context) {
 						err := database.AmDeleteImage(int32(id))
 						if err != nil {
 							log.Errorf("unable to delete image ID %d: %v", id, err)
 						}
-					}()
+					})
 				}
 			}()
 		}

util/workerpool.go

@@ -0,0 +1,94 @@
+/*
+ * Amsterdam Web Communities System
+ * Copyright (c) 2025 Erbosoft Metaverse Design Solutions, All Rights Reserved
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+// Package util contains utility definitions.
+package util
+
+import (
+	"context"
+	"sync"
+
+	log "github.com/sirupsen/logrus"
+)
+
+// Task is a function that can be submitted as a one-shot task.
+type Task func(ctx context.Context)
+
+// WorkerPool is a pool that can be used to submit one-shot background tasks.
+type WorkerPool struct {
+	ctx    context.Context    // context
+	cancel context.CancelFunc // cancellation function
+	tasks  chan Task          // our task queue
+	wg     sync.WaitGroup     // wait group for shutdown
+}
+
+/* AmNewPool creates a new WorkerPool.
+ * Parameters:
+ *     parent - The parent context for the worker pool.
+ *     workers - The number of worker goroutines to spawn.
+ *     queueSize - The size of the task queue.
+ * Returns:
+ *     Pointer to the new WorkerPool.
+ */
+func AmNewPool(parent context.Context, workers, queueSize int) *WorkerPool {
+	ctx, cancel := context.WithCancel(parent)
+	p := WorkerPool{
+		ctx:    ctx,
+		cancel: cancel,
+		tasks:  make(chan Task, queueSize),
+	}
+	for i := range workers {
+		p.wg.Add(1)
+		go p.worker(i)
+	}
+	return &p
+}
+
+// worker is the worker goroutine for a pool.
+func (p *WorkerPool) worker(id int) {
+	defer p.wg.Done()
+	for {
+		select {
+		case <-p.ctx.Done():
+			return
+		case task, ok := <-p.tasks:
+			if !ok {
+				return
+			}
+			func() {
+				defer func() {
+					if r := recover(); r != nil {
+						log.Errorf("worker %d panic: %v", id, r)
+					}
+				}()
+				task(p.ctx)
+			}()
+		}
+	}
+}
+
+// Submit queues a task for the worker pool.
+func (p *WorkerPool) Submit(task Task) bool {
+	select {
+	case p.tasks <- task:
+		return true
+	case <-p.ctx.Done():
+		return false
+	default:
+		// queue is full
+		return false
+	}
+}
+
+// Shutdown shuts down the worker pool.
+func (p *WorkerPool) Shutdown() {
+	p.cancel()
+	close(p.tasks)
+	p.wg.Wait()
+}