support get and delete on documents

packages/core/src/services/documents/documents.ts

@@ -26,6 +26,36 @@ class DocumentsService extends EventEmitter<DocumentEvents> {
     this.#services = services;
   }
 
+  public get = async (uri: string, type: string) => {
+    const db = await this.#services.get(DatabaseService).getDb();
+    const [document] = await db<TableRow['document']>(tableNames.documents)
+      .where({
+        uri,
+        type,
+      })
+      .limit(1);
+    return document;
+  };
+
+  public delete = async (uri: string, type: string) => {
+    const db = await this.#services.get(DatabaseService).getDb();
+    const [document] = await db<TableRow['document']>(tableNames.documents)
+      .where({
+        uri,
+        type,
+      })
+      .limit(1);
+    if (!document) {
+      return;
+    }
+    const toDelete: Document = {
+      ...document,
+      deletedAt: new Date().toISOString(),
+    };
+    await db(tableNames.documents).where({ uri, type }).update(toDelete);
+    this.emit('upsert', { action: 'delete', document: toDelete });
+  };
+
   public upsert = async (document: DocumentUpsert) => {
     const db = await this.#services.get(DatabaseService).getDb();
     const [current] = await db<TableRow['document']>(tableNames.documents)