add tags

backend/internal/db/queries/tags.sql

@@ -0,0 +1,41 @@
+-- name: CreateTag :one
+INSERT INTO tags (id, tag_name, tag_type)
+VALUES ($1, $2, $3)
+RETURNING *;
+
+-- name: GetTag :one
+SELECT * FROM tags
+WHERE id = $1;
+
+-- name: GetTagByName :one
+SELECT * FROM tags
+WHERE tag_name = $1;
+
+-- name: ListTags :many
+SELECT * FROM tags
+ORDER BY tag_name ASC;
+
+-- name: DeleteTag :exec
+DELETE FROM tags
+WHERE id = $1;
+
+-- name: AddTagToFile :exec
+INSERT INTO file_tags (id, tag_id, file_id)
+VALUES ($1, $2, $3)
+ON CONFLICT DO NOTHING;
+
+-- name: RemoveTagFromFile :exec
+DELETE FROM file_tags
+WHERE tag_id = $1 AND file_id = $2;
+
+-- name: GetTagsByFileID :many
+SELECT t.* FROM tags t
+JOIN file_tags ft ON t.id = ft.tag_id
+WHERE ft.file_id = $1
+ORDER BY t.tag_name ASC;
+
+-- name: GetFilesByTagID :many
+SELECT f.* FROM files f
+JOIN file_tags ft ON f.id = ft.file_id
+WHERE ft.tag_id = $1
+ORDER BY f.created_at DESC;