Add electron

backend/src/DataSource/DataSourceState.ts

@@ -0,0 +1,41 @@
+interface InternalState {
+  connecting: boolean
+  connected: boolean
+  error?: Error
+}
+
+export class DataSourceState {
+  private state: InternalState = {
+    error: undefined,
+    connected: false,
+    connecting: false
+  }
+
+  public setConnected(connected: boolean) {
+    this.state = {
+      error: undefined,
+      connected: connected,
+      connecting: false
+    }
+  }
+
+  public setError(error: Error) {
+    this.state = {
+      error: error,
+      connected: false,
+      connecting: false
+    }
+  }
+
+  public setConnecting() {
+    this.state = {
+      error: undefined,
+      connected: false,
+      connecting: true
+    }
+  }
+
+  public toJSON() {
+    return this.state
+  }
+}