first draft of posting to a topic (including preview)

conference.go

@@ -553,3 +553,117 @@ func ReadPosts(ctxt ui.AmContext) (string, any, error) {
 	}
 	return "framed_template", "posts.jet", nil
 }
+
+func PostInTopic(ctxt ui.AmContext) (string, any, error) {
+	// Locate community, conference, and topic.
+	comm := ctxt.CurrentCommunity()
+	conf := ctxt.GetScratch("currentConference").(*database.Conference)
+	var topic *database.Topic = nil
+	if rawTopic, err := strconv.ParseInt(ctxt.URLParam("topic"), 10, 16); err == nil {
+		topic, err = database.AmGetTopicByNumber(ctxt.Ctx(), conf, int16(rawTopic))
+	}
+	if topic == nil {
+		ctxt.SetRC(http.StatusNotFound)
+		return ui.ErrorPage(ctxt, fmt.Errorf("topic not found: %s", ctxt.URLParam("topic")))
+	}
+
+	urlStem := fmt.Sprintf("/comm/%s/conf/%s/r/%d", comm.Alias, ctxt.URLParam("confid"), topic.Number)
+	if ctxt.FormFieldIsSet("cancel") {
+		return "redirect", urlStem, nil
+	}
+	if ctxt.FormFieldIsSet("preview") {
+		// Preview the post.
+		checker, err := htmlcheck.AmNewHTMLChecker(ctxt.Ctx(), "escaper")
+		if err != nil {
+			return ui.ErrorPage(ctxt, err)
+		}
+		checker.Append(ctxt.FormField("pseud"))
+		checker.Finish()
+		v, _ := checker.Value()
+		ctxt.VarMap().Set("pseud", v)
+
+		// escape the data
+		postdata := ctxt.FormField("pb")
+		checker.Reset()
+		checker.Append(postdata)
+		checker.Finish()
+		v, _ = checker.Value()
+		ctxt.VarMap().Set("pb", v)
+
+		// run the preview
+		checker, err = htmlcheck.AmNewHTMLChecker(ctxt.Ctx(), "preview")
+		if err != nil {
+			return ui.ErrorPage(ctxt, err)
+		}
+		checker.SetContext("PostLinkDecoderContext", database.AmCreatePostLinkContext(comm.Alias, ctxt.URLParam("cid"), conf.TopTopic+1))
+		checker.Append(postdata)
+		checker.Finish()
+		v, _ = checker.Value()
+		ctxt.VarMap().Set("previewPb", v)
+		nErr, _ := checker.Counter("spelling")
+		ctxt.VarMap().Set("nError", nErr)
+
+		ctxt.VarMap().Set("maxPost", ctxt.FormField("xp"))
+		if ctxt.FormFieldIsSet("attach") {
+			ctxt.VarMap().Set("attachFile", true)
+		}
+		ctxt.VarMap().Set("urlStem", urlStem)
+		ctxt.VarMap().Set("amsterdam_pageTitle", "Previewing Message")
+		return "framed_template", "preview_post.jet", nil
+	}
+	// Figure out which URL to return to once this post is made.
+	var returnURL string
+	if ctxt.FormFieldIsSet("post") {
+		returnURL = urlStem
+	} else if ctxt.FormFieldIsSet("postnext") {
+		returnURL = urlStem // TODO
+	} else if ctxt.FormFieldIsSet("posttopics") {
+		returnURL = fmt.Sprintf("/comm/%s/conf/%s", comm.Alias, ctxt.URLParam("confid"))
+	} else {
+		return ui.ErrorPage(ctxt, errors.New("unknown post button"))
+	}
+	maxPost, err := ctxt.FormFieldInt("xp")
+	if err != nil {
+		return ui.ErrorPage(ctxt, err)
+	}
+	if int32(maxPost) < topic.TopMessage {
+		// Slippage detected! Display the slipped posts and another post box.
+		// TODO
+		return "framed_template", "???", nil
+	}
+	// start by checking the title and pseud
+	checker, err := htmlcheck.AmNewHTMLChecker(ctxt.Ctx(), "post-pseud")
+	if err != nil {
+		return ui.ErrorPage(ctxt, err)
+	}
+	checker.Append(ctxt.FormField("pseud"))
+	checker.Finish()
+	postPseud, _ := checker.Value()
+
+	// now check the post data itself
+	checker, err = htmlcheck.AmNewHTMLChecker(ctxt.Ctx(), "post-body")
+	if err != nil {
+		return ui.ErrorPage(ctxt, err)
+	}
+	checker.SetContext("PostLinkDecoderContext", database.AmCreatePostLinkContext(comm.Alias, ctxt.URLParam("cid"), conf.TopTopic+1))
+	checker.Append(ctxt.FormField("pb"))
+	checker.Finish()
+	postText, _ := checker.Value()
+	lines, _ := checker.Lines()
+
+	// Add the post!
+	hdr, err := database.AmNewPost(ctxt.Ctx(), conf, topic, ctxt.CurrentUser(), postPseud, postText, int32(lines))
+	if err != nil {
+		return ui.ErrorPage(ctxt, err)
+	}
+
+	if !ctxt.FormFieldIsSet("attach") {
+		return "redirect", returnURL, nil // no attachment - just redisplay topic list
+	}
+
+	// go upload the attachment
+	ctxt.VarMap().Set("target", returnURL)
+	ctxt.VarMap().Set("post", hdr.PostId)
+	ctxt.VarMap().Set("amsterdam_pageTitle", "Upload Attachment")
+	return "framed_template", "attachment_upload.jet", nil
+}

database/post.go

@@ -118,3 +118,86 @@ func AmGetPostRange(ctx context.Context, topic *Topic, first, last int32) ([]*Po
 	}
 	return rc, nil
 }
+
+/* AmNewPost adds a new post to a topic.
+ * Parameters:
+ *     ctx - Standard Go context value.
+ *     conf - Pointer to conference containing the topic.
+ *     topic - Pointer to topic.
+ *     user - Pointer to user posting the message.
+ *     pseud - Pseud for the new post.
+ *     post - New post text.
+ *     postLines - Number of lines in the post text.
+ * Returns:
+ *     New post header pointer.
+ *     Standard Go error status.
+ */
+func AmNewPost(ctx context.Context, conf *Conference, topic *Topic, user *User, pseud string, post string, postLines int32) (*PostHeader, error) {
+	success := false
+	tx := amdb.MustBegin()
+	defer func() {
+		if !success {
+			tx.Rollback()
+		}
+	}()
+	unlock := true
+	tx.ExecContext(ctx, "LOCK TABLES topics WRITE, topicsettings WRITE, posts WRITE, postdata WRITE;")
+	defer func() {
+		if unlock {
+			tx.ExecContext(ctx, "UNLOCK TABLES;")
+		}
+	}()
+
+	// Add the post header information.
+	rs, err := tx.ExecContext(ctx, "INSERT INTO posts (topicid, num, linecount, creator_uid, posted, pseud) VALUES (?, ?, ?, ?, NOW(), ?)",
+		topic.TopicId, topic.TopMessage+1, postLines, user.Uid, pseud)
+	if err != nil {
+		return nil, err
+	}
+	xid, err := rs.LastInsertId()
+	if err != nil {
+		return nil, err
+	}
+
+	// Read back the post header.
+	var dbdata []PostHeader
+	if err := tx.SelectContext(ctx, &dbdata, "SELECT * FROM posts WHERE postid = ?", xid); err != nil {
+		return nil, err
+	}
+	if len(dbdata) == 0 {
+		return nil, errors.New("AmNewPost: new post not found")
+	}
+	if len(dbdata) > 1 {
+		return nil, fmt.Errorf("AmNewPost: too many entries (%d) for post ID %d", len(dbdata), xid)
+	}
+	hdr := &(dbdata[0])
+
+	// Add the post data.
+	_, err = tx.ExecContext(ctx, "INSERT INTO postdata (postid, data) VALUES (?, ?)", int32(xid), hdr.PostId)
+	if err != nil {
+		return nil, err
+	}
+
+	// Update the topic.
+	_, err = tx.ExecContext(ctx, "UPDATE topics SET top_message = ?, lastupdate = ? WHERE topicid = ?", hdr.Num, hdr.Posted, topic.TopicId)
+	if err != nil {
+		return nil, err
+	}
+	topic.TopMessage = hdr.Num
+	topic.LastUpdate = hdr.Posted
+
+	tx.ExecContext(ctx, "UNLOCK TABLES;")
+	unlock = false
+
+	// update the "last posted" date in the conference settings
+	_, err = conf.TouchPost(ctx, tx, user, hdr.Posted)
+	if err != nil {
+		return nil, err
+	}
+
+	if err = tx.Commit(); err != nil {
+		return nil, err
+	}
+	success = true
+	return hdr, nil
+}

main.go

@@ -99,6 +99,7 @@ func setupEcho() *echo.Echo {
 	confGroup.GET("/new_topic", ui.AmWrap(NewTopicForm))
 	confGroup.POST("/new_topic", ui.AmWrap(NewTopic))
 	confGroup.GET("/r/:topic", ui.AmWrap(ReadPosts))
+	confGroup.POST("/r/:topic", ui.AmWrap(PostInTopic))
 
 	return e
 }

ui/views/posts.jet

@@ -106,11 +106,8 @@
         <hr class="border-gray-400 mb-6">
         <h2 class="text-2xl font-bold text-black mb-4">Post Message in "{{ topicName }}":</h2>
         
-        <form method="POST" action="/TODO">
+        <form method="POST" action="{{ post_stem }}">
-            <input type="hidden" name="sd" value="4">
+            <input type="hidden" name="xp" value="{{ post_max }}"/>
-            <input type="hidden" name="conf" value="2">
-            <input type="hidden" name="cc" value="2">
-            <input type="hidden" name="top" value="4">
 
             <div class="bg-gray-50 p-6 rounded-lg space-y-4">
                 <div>
@@ -137,6 +134,7 @@
                 <div class="flex justify-center gap-4">
                     <button type="submit" name="preview" class="bg-gray-600 hover:bg-gray-700 text-white px-6 py-2 rounded font-medium transition-colors">Preview</button>
                     <button type="submit" name="post" class="bg-green-600 hover:bg-green-700 text-white px-6 py-2 rounded font-medium transition-colors">Post & Reload</button>
+                    <button type="submit" name="postnext" class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-2 rounded font-medium transition-colors">Post & Go Next</button>
                     <button type="submit" name="posttopics" class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-2 rounded font-medium transition-colors">Post & Go Topics</button>
                 </div>
             </div>

ui/views/preview_post.jet

@@ -0,0 +1,101 @@
+{*
+ * Amsterdam Web Communities System
+ * Copyright (c) 2025-2026 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="p-4">
+    <div class="mb-6">
+        <h1 class="text-blue-800 text-4xl font-bold inline">Previewing Post</h1>
+        <hr class="border-2 border-gray-400 w-4/5 mt-2 mb-6">
+    </div>
+
+    <!-- Preview Section -->
+    <div class="max-w-3xl mb-8">
+        <!-- Spelling Error Notice -->
+        {{ if nError == 0 }}
+            <div class="bg-blue-50 border-l-4 border-blue-400 p-4 mb-6">
+                <p class="text-sm font-bold text-blue-800">
+                    Your post did not contain any spelling errors.
+                </p>
+            </div>
+        {{ else }}
+            <div class="bg-yellow-50 border-l-4 border-yellow-400 p-4 mb-6">
+                <p class="text-sm font-bold text-yellow-800">
+                    {{ if nError == 1 }}
+                        There was 1 spelling error in your post.
+                    {{ else }}
+                        There were {{ nError }} spelling errors in your post.
+                    {{ end }}
+                </p>
+            </div>
+        {{ end }}
+
+        <!-- Preview Display -->
+        <div class="bg-white border-2 border-blue-300 rounded-lg p-6 mb-6">
+            <pre class="amsPost font-mono text-sm whitespace-pre-wrap break-words">{{ previewPb | postRewrite | raw }}</pre>
+        </div>
+
+        <hr class="border-gray-400 mb-6">
+    </div>
+
+    <!-- Posting Form -->
+    <div class="max-w-3xl">
+        <form method="POST" action="{{ urlStem }}">
+            <input type="hidden" name="xp" value="{{ maxPost }}"/>
+            <div class="bg-gray-50 p-6 rounded-lg space-y-4">
+                <!-- Your Name/Header and Attach File -->
+                <div>
+                    <label for="pseud" class="block text-black text-sm font-medium mb-2">Your name/header:</label>
+                    <div class="flex items-center gap-4">
+                        <input type="text" id="pseud" name="pseud" size="37" maxlength="255" value="{{ pseud | raw }}"
+                                class="flex-1 px-3 py-2 border border-gray-300 rounded font-mono focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500">
+                        <div class="flex items-center gap-2">
+                            <input type="checkbox" id="attach" name="attach" value="Y"
+                                    {{ if isset(attachFile) }}checked{{ end }}
+                                    class="w-4 h-4 text-blue-600 border-gray-300 rounded focus:ring-blue-500">
+                            <label for="attach" class="text-black text-sm">Attach a file</label>
+                        </div>
+                    </div>
+                </div>
+
+                <!-- Message -->
+                <div>
+                    <div class="flex justify-between items-center mb-2">
+                        <label for="pb" class="text-black text-sm font-medium">Message:</label>
+                        <a href="/TODO/html-reference" target="_blank"
+                            class="text-blue-700 hover:text-blue-900 text-sm">HTML Guide</a>
+                    </div>
+                    <textarea id="pb" name="pb" wrap="soft" rows="7" cols="51"
+                                placeholder="Enter your message here. HTML tags are supported..."
+                                class="w-full px-3 py-2 border border-gray-300 rounded font-mono text-sm focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500">{{ pb | raw }}</textarea>
+                </div>
+
+                <!-- Action Buttons -->
+                <div class="flex justify-center gap-4 pt-4">
+                    <button type="submit" name="preview" class="bg-gray-600 hover:bg-gray-700 text-white px-6 py-2 rounded font-medium transition-colors">Preview Again</button>
+                    <button type="submit" name="post" class="bg-green-600 hover:bg-green-700 text-white px-6 py-2 rounded font-medium transition-colors">Post & Reload</button>
+                    <button type="submit" name="postnext" class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-2 rounded font-medium transition-colors">Post & Go Next</button>
+                    <button type="submit" name="posttopics" class="bg-blue-600 hover:bg-blue-700 text-white px-6 py-2 rounded font-medium transition-colors">Post & Go Topics</button>
+                    <button type="submit" name="cancel" class="bg-red-600 hover:bg-red-700 text-white px-6 py-2 rounded font-medium transition-colors">Cancel</button>
+                </div>
+            </div>
+        </form>
+
+        <!-- Posting Guidelines -->
+        <div class="mt-6 p-4 bg-blue-50 border-l-4 border-blue-400">
+            <h3 class="text-sm font-bold text-blue-900 mb-2">Review Your Post:</h3>
+            <ul class="text-xs text-blue-800 space-y-1 list-disc list-inside">
+                <li>Check the preview above to see how your post will appear to others</li>
+                <li>Spelling errors are highlighted in red - you can edit your message to fix them</li>
+                <li>Click "Preview Again" to see updated changes before posting</li>
+                <li>When satisfied, click "Add Topic" to submit your message</li>
+            </ul>
+        </div>
+    </div>
+
+
+
+</div>