A bunch of stupid junk that didn't work re: snippets

This was a pile of changes I made live on master that ultimately just
did not work at all. Don't program on 4 hours of sleep.

Handle a Not Found more gracefully in snippet code

I don't really know how this happens, but there's no reason to crash if
it happens.

Add example of disabling search engine indexing in beta

Fix incorrect varargs

I dunno change some snippet stuff

I'm so done with this

What if we didn't return for no reason

Actually parse the discord messages for tags

none of this is shippable. none of it

Final WIP

server/Caddyfile

@@ -9,6 +9,15 @@
         respond "{\"m.server\": \"matrix.handmade.network:443\"}"
         header Content-Type application/json
     }
+# Uncomment this ONLY FOR BETA!
+# It disables all search engine indexing!
+# If you do this on the real site you will destroy all the site's SEO!
+# ONLY UNCOMMENT THIS IN BETA!
+#     handle /robots.txt {
+#         respond "User-agent: *
+# Disallow: /
+# "
+#     }
     handle /public/* {
         file_server {
             root /home/hmn/hmn

src/config/types.go

@@ -76,7 +76,6 @@ type DiscordConfig struct {
 	MemberRoleID      string
 	ShowcaseChannelID string
 	LibraryChannelID  string
-	JamShowcaseChannelID string
 }
 
 type EpisodeGuide struct {

src/discord/gateway.go

@@ -598,7 +598,6 @@ func (bot *botInstance) messageCreateOrUpdate(ctx context.Context, msg *Message)
 			logging.ExtractLogger(ctx).Error().Err(err).Msg("failed to process showcase message")
 			return nil
 		}
-		return nil
 	}
 
 	if msg.ChannelID == config.Config.Discord.LibraryChannelID {
@@ -607,7 +606,6 @@ func (bot *botInstance) messageCreateOrUpdate(ctx context.Context, msg *Message)
 			logging.ExtractLogger(ctx).Error().Err(err).Msg("failed to process library message")
 			return nil
 		}
-		return nil
 	}
 
 	err := UpdateSnippetTagsIfAny(ctx, bot.dbConn, msg)

src/discord/history.go

@@ -193,6 +193,7 @@ func handleHistoryMessage(ctx context.Context, dbConn *pgxpool.Pool, msg *Messag
 		}
 		break
 	}
+	defer tx.Rollback(ctx)
 
 	newMsg, err := SaveMessageAndContents(ctx, tx, msg)
 	if err != nil {

src/discord/showcase.go

@@ -61,17 +61,15 @@ func (bot *botInstance) processShowcaseMsg(ctx context.Context, msg *Message) er
 	// ...and maybe make a snippet too, if the user wants us to
 	duser, err := FetchDiscordUser(ctx, tx, newMsg.UserID)
 	if err == nil && duser.HMNUser.DiscordSaveShowcase {
-		err = CreateMessageSnippets(ctx, tx, newMsg.UserID, msg.ID)
+		err = CreateMessageSnippets(ctx, tx, msg.ID)
 		if err != nil {
 			return oops.New(err, "failed to create snippet in gateway")
 		}
-	} else {
+	} else if err == db.NotFound {
-		if err == db.NotFound {
 		// this is fine, just don't create a snippet
-		} else {
+	} else if err != nil {
 		return err
 	}
-	}
 
 	err = tx.Commit(ctx)
 	if err != nil {
@@ -148,11 +146,9 @@ func SaveMessage(
 
 		guildID := msg.GuildID
 		if guildID == nil {
-			/*
+			// This is weird, but it can happen when we fetch messages from
-				This is weird, but it can happen when we fetch messages from
+			// history instead of receiving it from the gateway. In this case
-				history instead of receiving it from the gateway. In this case
+			// we just assume it's from the HMN server.
-				we just assume it's from the HMN server.
-			*/
 			guildID = &config.Config.Discord.GuildID
 		}
 
@@ -593,7 +589,13 @@ func CreateMessageSnippets(ctx context.Context, dbConn db.ConnOrTx, msgIDs ...st
 			`,
 			msgID,
 		)
-		if err != nil {
+		if err == db.NotFound {
+			logging.ExtractLogger(ctx).Warn().
+				Str("messageID", msgID).
+				Stack().
+				Msg("No record was found for this Discord message at all. Is it actually a message ID?")
+			continue
+		} else if err != nil {
 			return oops.New(err, "failed to check for existing snippet for message %s", msgID)
 		}
 		existing := iexisting.(*existingSnippetResult)
@@ -689,6 +691,8 @@ If no Discord user is linked, or no snippet exists, or whatever, this will do
 nothing and return no error.
 */
 func UpdateSnippetTagsIfAny(ctx context.Context, dbConn db.ConnOrTx, msg *Message) error {
+	logging.ExtractLogger(ctx).Debug().Str("msgID", msg.ID).Msg("updating snippets for message (if any)")
+
 	tx, err := dbConn.Begin(ctx)
 	if err != nil {
 		return oops.New(err, "failed to start transaction")
@@ -720,10 +724,50 @@ func UpdateSnippetTagsIfAny(ctx context.Context, dbConn db.ConnOrTx, msg *Messag
 	if err != nil {
 		return oops.New(err, "failed to look up user projects")
 	}
-	projectIDs := make([]int, len(projects))
+	userTagIDs := make([]int, 0, len(projects))
-	for i, p := range projects {
+	for _, p := range projects {
-		projectIDs[i] = p.Project.ID
+		if p.Project.TagID != nil {
+			userTagIDs = append(userTagIDs, *p.Project.TagID)
 		}
+	}
+
+	// Try to associate tags in the message with project tags in HMN.
+	// Match only tags for projects in which the current user is a collaborator.
+	messageTags := getDiscordTags(s.Snippet.Description)
+	type tagsRow struct {
+		Tag models.Tag `db:"tags"`
+	}
+	itUserTags, err := db.Query(ctx, tx, tagsRow{},
+		`
+		SELECT $columns
+		FROM
+			tags
+		WHERE
+			id = ANY ($1)
+		`,
+		userTagIDs,
+	)
+	if err != nil {
+		return oops.New(err, "failed to fetch tags for user projects")
+	}
+	iUserTags := itUserTags.ToSlice()
+
+	var tagIDs []int
+	for _, itag := range iUserTags {
+		tag := itag.(*tagsRow).Tag
+		for _, messageTag := range messageTags {
+			if tag.Text == messageTag {
+				userTagIDs = append(userTagIDs, tag.ID)
+			}
+		}
+	}
+
+	logging.ExtractLogger(ctx).Info().
+		Interface("messageTags", messageTags).
+		Interface("tagIDs", tagIDs).
+		Int("snippetID", s.Snippet.ID).
+		Str("discordMsgID", msg.ID).
+		Msg("adding tags to snippet based on Discord message")
 
 	// Delete any existing project tags for this snippet. We don't want to
 	// delete other tags in case in the future we have manual tagging on the
@@ -743,39 +787,6 @@ func UpdateSnippetTagsIfAny(ctx context.Context, dbConn db.ConnOrTx, msg *Messag
 		return oops.New(err, "failed to delete existing snippet tags")
 	}
 
-	// Try to associate tags in the message with project tags in HMN.
-	// Match only tags for projects in which the current user is a collaborator.
-	messageTags := getDiscordTags(s.Snippet.Description)
-	type tagsRow struct {
-		Tag models.Tag `db:"tags"`
-	}
-	itUserTags, err := db.Query(ctx, tx, tagsRow{},
-		`
-		SELECT $columns
-		FROM
-			tags
-			JOIN handmade_project AS project ON project.tag = tags.id
-			JOIN handmade_user_projects AS user_project ON user_project.project_id = project.id
-		WHERE
-			project.id = ANY ($1)
-		`,
-		projectIDs,
-	)
-	if err != nil {
-		return oops.New(err, "failed to fetch tags for user projects")
-	}
-	iUserTags := itUserTags.ToSlice()
-
-	var tagIDs []int
-	for _, itag := range iUserTags {
-		tag := itag.(*tagsRow).Tag
-		for _, messageTag := range messageTags {
-			if tag.Text == messageTag {
-				tagIDs = append(tagIDs, tag.ID)
-			}
-		}
-	}
-
 	for _, tagID := range tagIDs {
 		_, err = tx.Exec(ctx,
 			`