prepare for client/server split

packages/plugin-core/src/plugin.ts

@@ -0,0 +1,39 @@
+import { createPlugin } from '@plainidx/plainidx';
+import { CorePlugin } from './manifest.js';
+import { migrations } from './migrations/migrations.js';
+
+const core = createPlugin(CorePlugin, ({ getDb }) => {
+  const dbPromise = getDb('data', migrations);
+  return {
+    backend: true,
+    actions: {
+      getTitles: async () => {
+        const db = await dbPromise;
+        const results = await db('titles').select(['location', 'title']);
+        return results;
+      },
+      getTags: async () => {
+        const db = await dbPromise;
+        const results = await db('tags')
+          .select(['name', db.raw('count(*) as count')])
+          .groupBy('name');
+        return results;
+      },
+      setData: async ({ location, title, tags }) => {
+        const db = await dbPromise;
+        const currentTitle = await db('titles').select('title').where({ location }).first();
+        await db.transaction(async (trx) => {
+          await trx('tags').delete().where({ location });
+          await trx('tags').insert(tags.map((tag) => ({ name: tag, location })));
+          if (currentTitle) {
+            await trx('titles').update({ title }).where({ location });
+          } else {
+            await trx('titles').insert({ location, title });
+          }
+        });
+      },
+    },
+  };
+});
+
+export { core };