feat: add support for IPC client managed session storage

libs/common/src/platform/ipc/index.ts

@@ -1,2 +1,3 @@
 export * from "./ipc-message";
 export * from "./ipc.service";
+export * from "./ipc-session-repository";

libs/common/src/platform/ipc/ipc-session-repository.ts

@@ -0,0 +1,44 @@
+import { firstValueFrom, map } from "rxjs";
+
+import { Endpoint, IpcSessionRepository as SdkIpcSessionRepository } from "@bitwarden/sdk-internal";
+
+import { GlobalState, IPC_MEMORY, KeyDefinition, StateProvider } from "../state";
+
+const IPC_SESSIONS = KeyDefinition.record<object, string>(IPC_MEMORY, "ipcSessions", {
+  deserializer: (value: object) => value,
+});
+
+export class IpcSessionRepository implements SdkIpcSessionRepository {
+  private states: GlobalState<Record<string, object>>;
+
+  constructor(private stateProvider: StateProvider) {
+    this.states = this.stateProvider.getGlobal(IPC_SESSIONS);
+  }
+
+  get(endpoint: Endpoint): Promise<any | undefined> {
+    return firstValueFrom(this.states.state$.pipe(map((s) => s?.[endpointToString(endpoint)])));
+  }
+
+  async save(endpoint: Endpoint, session: any): Promise<void> {
+    await this.states.update((s) => ({
+      ...s,
+      [endpointToString(endpoint)]: session,
+    }));
+  }
+
+  async remove(endpoint: Endpoint): Promise<void> {
+    await this.states.update((s) => {
+      const newState = { ...s };
+      delete newState[endpointToString(endpoint)];
+      return newState;
+    });
+  }
+}
+
+function endpointToString(endpoint: Endpoint): string {
+  if (typeof endpoint === "object" && "Web" in endpoint) {
+    return `Web(${endpoint.Web.id})`;
+  }
+
+  return endpoint;
+}