Initial commit: Lookbook personal collection app

Pinterest-like app for saving images, videos, quotes, and embeds.

Features:
- Go backend with PostgreSQL, SSR templates
- Console-based admin auth (login/logout via browser console)
- Item types: images, videos (ffmpeg transcoding), quotes, embeds
- Media stored as BLOBs in PostgreSQL
- OpenGraph metadata extraction for links
- Embed detection for YouTube, Vimeo, Twitter/X
- Masonry grid layout, item detail pages
- Tag system with filtering
- Refresh metadata endpoint with change warnings
- Replace media endpoint for updating item images/videos

internal/data/tag/queries.go

@@ -0,0 +1,153 @@
+package tag
+
+import (
+	"context"
+	"database/sql"
+)
+
+type Row struct {
+	ID   int64
+	Name string
+}
+
+// QFindOrCreate finds a tag by name or creates it if it doesn't exist.
+func QFindOrCreate(ctx context.Context, db *sql.DB, name string) (Row, error) {
+	query := `
+		INSERT INTO tag (name)
+		VALUES ($1)
+		ON CONFLICT (name) DO UPDATE SET name = EXCLUDED.name
+		RETURNING id, name
+	`
+
+	var row Row
+	err := db.QueryRowContext(ctx, query, name).Scan(&row.ID, &row.Name)
+	return row, err
+}
+
+// QFindByName finds a tag by name.
+func QFindByName(ctx context.Context, db *sql.DB, name string) (*Row, error) {
+	query := `SELECT id, name FROM tag WHERE name = $1`
+
+	var row Row
+	err := db.QueryRowContext(ctx, query, name).Scan(&row.ID, &row.Name)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &row, nil
+}
+
+// QList returns all tags ordered by name.
+func QList(ctx context.Context, db *sql.DB) ([]Row, error) {
+	query := `SELECT id, name FROM tag ORDER BY name ASC`
+
+	rows, err := db.QueryContext(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var tags []Row
+	for rows.Next() {
+		var row Row
+		if err := rows.Scan(&row.ID, &row.Name); err != nil {
+			return nil, err
+		}
+		tags = append(tags, row)
+	}
+	return tags, rows.Err()
+}
+
+// QSuggest returns tags matching a prefix.
+func QSuggest(ctx context.Context, db *sql.DB, prefix string, limit int) ([]Row, error) {
+	query := `
+		SELECT id, name FROM tag
+		WHERE name ILIKE $1 || '%'
+		ORDER BY name ASC
+		LIMIT $2
+	`
+
+	rows, err := db.QueryContext(ctx, query, prefix, limit)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var tags []Row
+	for rows.Next() {
+		var row Row
+		if err := rows.Scan(&row.ID, &row.Name); err != nil {
+			return nil, err
+		}
+		tags = append(tags, row)
+	}
+	return tags, rows.Err()
+}
+
+// QTagsForItem returns all tags for an item.
+func QTagsForItem(ctx context.Context, db *sql.DB, itemID int64) ([]Row, error) {
+	query := `
+		SELECT t.id, t.name
+		FROM tag t
+		JOIN item_tag it ON t.id = it.tag_id
+		WHERE it.item_id = $1
+		ORDER BY t.name ASC
+	`
+
+	rows, err := db.QueryContext(ctx, query, itemID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var tags []Row
+	for rows.Next() {
+		var row Row
+		if err := rows.Scan(&row.ID, &row.Name); err != nil {
+			return nil, err
+		}
+		tags = append(tags, row)
+	}
+	return tags, rows.Err()
+}
+
+// QAddTagToItem adds a tag to an item.
+func QAddTagToItem(ctx context.Context, db *sql.DB, itemID, tagID int64) error {
+	query := `
+		INSERT INTO item_tag (item_id, tag_id)
+		VALUES ($1, $2)
+		ON CONFLICT DO NOTHING
+	`
+	_, err := db.ExecContext(ctx, query, itemID, tagID)
+	return err
+}
+
+// QRemoveTagFromItem removes a tag from an item.
+func QRemoveTagFromItem(ctx context.Context, db *sql.DB, itemID, tagID int64) error {
+	query := `DELETE FROM item_tag WHERE item_id = $1 AND tag_id = $2`
+	_, err := db.ExecContext(ctx, query, itemID, tagID)
+	return err
+}
+
+// QSetTagsForItem replaces all tags for an item with the given tag names.
+func QSetTagsForItem(ctx context.Context, db *sql.DB, itemID int64, tagNames []string) error {
+	// Delete existing tags
+	_, err := db.ExecContext(ctx, `DELETE FROM item_tag WHERE item_id = $1`, itemID)
+	if err != nil {
+		return err
+	}
+
+	// Add new tags
+	for _, name := range tagNames {
+		tag, err := QFindOrCreate(ctx, db, name)
+		if err != nil {
+			return err
+		}
+		if err := QAddTagToItem(ctx, db, itemID, tag.ID); err != nil {
+			return err
+		}
+	}
+	return nil
+}