feat: jwst connectivity

libs/datasource/db-service/src/services/base.ts

@@ -23,6 +23,13 @@ export abstract class ServiceBaseClass {
         return db.getWorkspace();
     }
 
+    async listenConnectivity(
+        workspace: string,
+        callback: (state: string) => void
+    ) {
+        this.database.listenConnectivity(workspace, workspace, callback);
+    }
+
     async onHistoryChange(
         workspace: string,
         name: string,

libs/datasource/db-service/src/services/database/index.ts

@@ -6,6 +6,7 @@ import {
     BlockContentExporter,
     BlockMatcher,
     BlockInitOptions,
+    Connectivity,
 } from '@toeverything/datasource/jwt';
 import { sleep } from '@toeverything/utils';
 
@@ -81,6 +82,18 @@ export class Database {
         return db;
     }
 
+    async listenConnectivity(
+        workspace: string,
+        name: string,
+        listener: (connectivity: Connectivity) => void
+    ) {
+        const db = await _getBlockDatabase(workspace);
+        return db.addConnectivityListener(name, state => {
+            const connectivity = state.get(name);
+            if (connectivity) listener(connectivity);
+        });
+    }
+
     async registerContentExporter(
         workspace: string,
         name: string,