added topic subscribe/unsubscribe

conference_ops.go

@@ -429,6 +429,13 @@ func TopicManage(ctxt ui.AmContext) (string, any, error) {
 	}
 	ctxt.VarMap().Set("canInvite", member)
 
+	// Get the E-mail subscription status.
+	sub, err := topic.IsSubscribed(ctxt.Ctx(), ctxt.CurrentUser())
+	if err != nil {
+		return ui.ErrorPage(ctxt, err)
+	}
+	ctxt.VarMap().Set("subscribed", sub)
+
 	// Get the filtered users list.
 	bozos, err := topic.GetBozos(ctxt.Ctx(), ctxt.CurrentUser())
 	if err != nil {
@@ -436,12 +443,36 @@ func TopicManage(ctxt ui.AmContext) (string, any, error) {
 	}
 	ctxt.VarMap().Set("bozos", bozos)
 
-	ctxt.VarMap().Set("subscribed", false) // TODO
-
 	ctxt.VarMap().Set("amsterdam_pageTitle", "Manage Topic: "+topic.Name)
 	return "framed_template", "manage_topic.jet", nil
 }
 
+/* TopicSetSubscribe toggles the "subscription" flag on the current topic for the current user.
+ * Parameters:
+ *     ctxt - The AmContext for the request.
+ * Returns:
+ *     Command string dictating what to be rendered.
+ *     Data as a parameter for the command string.
+ *     Standard Go error status.
+ */
+func TopicSetSubscribe(ctxt ui.AmContext) (string, any, error) {
+	if ctxt.CurrentUser().IsAnon {
+		ctxt.SetRC(http.StatusForbidden)
+		return ui.ErrorPage(ctxt, ENOPERM)
+	}
+	comm := ctxt.CurrentCommunity()
+	topic := ctxt.GetScratch("currentTopic").(*database.Topic)
+	flag, err := topic.IsSubscribed(ctxt.Ctx(), ctxt.CurrentUser())
+	if err != nil {
+		return ui.ErrorPage(ctxt, err)
+	}
+	err = topic.SetSubscribed(ctxt.Ctx(), ctxt.CurrentUser(), !flag)
+	if err != nil {
+		return ui.ErrorPage(ctxt, err)
+	}
+	return "redirect", fmt.Sprintf("/comm/%s/conf/%s/op/%d/manage", comm.Alias, ctxt.GetScratch("currentAlias"), topic.Number), nil
+}
+
 /* TopicRemoveBozo removes filtering from a specified user in the topic.
  * Parameters:
  *     ctxt - The AmContext for the request.

database/topic.go

@@ -240,6 +240,36 @@ func (t *Topic) GetBozos(ctx context.Context, u *User) ([]TopicBozo, error) {
 	return rc, nil
 }
 
+// IsSubscribed returns true if the given user is subscribed to receive E-mails of topic posts.
+func (t *Topic) IsSubscribed(ctx context.Context, u *User) (bool, error) {
+	row := amdb.QueryRowContext(ctx, "SELECT subscribe FROM topicsettings WHERE topicid = ? AND uid = ?", t.TopicId, u.Uid)
+	var rc bool
+	err := row.Scan(&rc)
+	switch err {
+	case nil:
+		return rc, nil
+	case sql.ErrNoRows:
+		return false, nil
+	}
+	return false, err
+}
+
+// SetSubscribed sets the "subscribed" flag for the given user.
+func (t *Topic) SetSubscribed(ctx context.Context, u *User, flag bool) error {
+	if u.IsAnon {
+		return nil
+	}
+	rs, err := amdb.ExecContext(ctx, "UPDATE topicsettings SET subscribe = ? WHERE topicid = ? AND uid = ?", flag, t.TopicId, u.Uid)
+	if err == nil {
+		var rows int64
+		rows, err = rs.RowsAffected()
+		if err == nil && rows == 0 {
+			_, err = amdb.ExecContext(ctx, "INSERT INTO topicsettings (topicid, uid, subscribe)", t.TopicId, u.Uid, flag)
+		}
+	}
+	return err
+}
+
 // GetSubscribers returns an array of UIDs of every user that subscribed to the topic.
 func (t *Topic) GetSubscribers(ctx context.Context) ([]int32, error) {
 	rs, err := amdb.QueryContext(ctx, "SELECT uid FROM topicsettings WHERE topicid = ? AND subscribe <> 0", t.TopicId)

docs/MISSINGFUNCS.md

@@ -33,7 +33,7 @@ _(italicized items can be deferred)_
 - Posts view:
   - Find
   - Manage:
-    - Subscribe to Topic
+    - ~~Subscribe to Topic~~
     - Send invite
     - ~~Filtered Users (list/remove)~~
   - ~~Stick/Unstick~~

main.go

@@ -114,6 +114,7 @@ func setupEcho() *echo.Echo {
 	opsGroup.GET("/scribble/:msg", ui.AmWrap(ScribbleMessage))
 	opsGroup.GET("/nuke/:msg", ui.AmWrap(NukeMessage))
 	opsGroup.GET("/manage", ui.AmWrap(TopicManage))
+	opsGroup.GET("/subscribe", ui.AmWrap(TopicSetSubscribe))
 	opsGroup.GET("/rmbozo/:uid", ui.AmWrap(TopicRemoveBozo))
 
 	return e

ui/views/manage_topic.jet

@@ -29,7 +29,7 @@
         {{ end }}
     </div>
     <div class="mb-4">
-        <a class="text-blue-700 hover:text-blue-900 text-sm font-bold" href="/TODO/{{ opsLink }}/subscribe">
+        <a class="text-blue-700 hover:text-blue-900 text-sm font-bold" href="{{ opsLink }}/subscribe">
             {{ if subscribed }}
                 Click Here To Stop Subscribing To This Topic
             {{ else }}