Update project last updated fields on new forum/blog posts

src/migration/migrations/2021-09-09T033556Z_DropUpdateColumns.go

@@ -0,0 +1,54 @@
+package migrations
+
+import (
+	"context"
+	"time"
+
+	"git.handmade.network/hmn/hmn/src/migration/types"
+	"git.handmade.network/hmn/hmn/src/oops"
+	"github.com/jackc/pgx/v4"
+)
+
+func init() {
+	registerMigration(DropUpdateColumns{})
+}
+
+type DropUpdateColumns struct{}
+
+func (m DropUpdateColumns) Version() types.MigrationVersion {
+	return types.MigrationVersion(time.Date(2021, 9, 9, 3, 35, 56, 0, time.UTC))
+}
+
+func (m DropUpdateColumns) Name() string {
+	return "DropUpdateColumns"
+}
+
+func (m DropUpdateColumns) Description() string {
+	return "Drop old columns related to update times"
+}
+
+func (m DropUpdateColumns) Up(ctx context.Context, tx pgx.Tx) error {
+	_, err := tx.Exec(ctx, `
+		ALTER TABLE handmade_project
+			DROP profile_last_updated,
+			DROP static_last_updated;
+	`)
+	if err != nil {
+		return oops.New(err, "failed to drop update columns")
+	}
+
+	return nil
+}
+
+func (m DropUpdateColumns) Down(ctx context.Context, tx pgx.Tx) error {
+	_, err := tx.Exec(ctx, `
+		ALTER TABLE handmade_project
+			ADD profile_last_updated TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT 'epoch',
+			ADD static_last_updated TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT 'epoch';
+	`)
+	if err != nil {
+		return oops.New(err, "failed to add old update columns")
+	}
+
+	return nil
+}

src/models/project.go

@@ -57,6 +57,9 @@ type Project struct {
 	Featured              bool      `db:"featured"`
 	DateApproved          time.Time `db:"date_approved"`
 	AllLastUpdated        time.Time `db:"all_last_updated"`
+	ForumLastUpdated      time.Time `db:"forum_last_updated"`
+	BlogLastUpdated       time.Time `db:"blog_last_updated"`
+	AnnotationLastUpdated time.Time `db:"annotation_last_updated"`
 
 	ForumEnabled   bool `db:"forum_enabled"`
 	BlogEnabled    bool `db:"blog_enabled"`

src/website/threads_and_posts_helper.go

@@ -3,8 +3,10 @@ package website
 import (
 	"context"
 	"errors"
+	"fmt"
 	"math"
 	"net"
+	"strings"
 	"time"
 
 	"git.handmade.network/hmn/hmn/src/db"
@@ -279,6 +281,30 @@ func CreateNewPost(
 		panic(oops.New(err, "failed to fix up thread post IDs"))
 	}
 
+	// Track a project update
+	updateEntries := []string{"all_last_updated"}
+	switch threadType {
+	case models.ThreadTypeForumPost:
+		updateEntries = append(updateEntries, "forum_last_updated")
+	case models.ThreadTypeProjectBlogPost, models.ThreadTypePersonalBlogPost:
+		updateEntries = append(updateEntries, "blog_last_updated")
+	}
+	for i := range updateEntries {
+		updateEntries[i] = fmt.Sprintf("%s = $2", updateEntries[i])
+	}
+	updates := strings.Join(updateEntries, ", ")
+
+	_, err = tx.Exec(ctx,
+		`
+		UPDATE handmade_project
+		SET `+updates+`
+		WHERE
+			id = $1
+		`,
+		projectId,
+		time.Now(),
+	)
+
 	return
 }