feat(repos): tags, polymorphic entity_links, attachments

lib/db/repos/links.js

@@ -0,0 +1,33 @@
+import { pool } from '../pool.js';
+
+export async function create(from_type, from_id, to_type, to_id, relation = 'attached') {
+  const { rows: [r] } = await pool.query(
+    `INSERT INTO entity_links(from_type, from_id, to_type, to_id, relation)
+     VALUES($1,$2,$3,$4,$5)
+     ON CONFLICT (from_type, from_id, to_type, to_id, relation)
+       DO UPDATE SET relation=EXCLUDED.relation
+     RETURNING *`,
+    [from_type, from_id, to_type, to_id, relation]
+  );
+  return r;
+}
+
+export async function listFrom(from_type, from_id) {
+  const { rows } = await pool.query(
+    `SELECT * FROM entity_links WHERE from_type=$1 AND from_id=$2`,
+    [from_type, from_id]
+  );
+  return rows;
+}
+
+export async function listTo(to_type, to_id) {
+  const { rows } = await pool.query(
+    `SELECT * FROM entity_links WHERE to_type=$1 AND to_id=$2`,
+    [to_type, to_id]
+  );
+  return rows;
+}
+
+export async function remove(id) {
+  await pool.query(`DELETE FROM entity_links WHERE id=$1`, [id]);
+}