UUID-keyed lookups in SignalProtocolStore

ts/types/UUID.ts

@@ -0,0 +1,44 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { strictAssert } from '../util/assert';
+import { isValidGuid } from '../util/isValidGuid';
+
+export type UUIDStringType = `${string}-${string}-${string}-${string}-${string}`;
+
+export class UUID {
+  constructor(protected readonly value: string) {
+    strictAssert(isValidGuid(value), `Invalid UUID: ${value}`);
+  }
+
+  public toString(): UUIDStringType {
+    return (this.value as unknown) as UUIDStringType;
+  }
+
+  public isEqual(other: UUID): boolean {
+    return this.value === other.value;
+  }
+
+  public static parse(value: string): UUID {
+    return new UUID(value);
+  }
+
+  public static lookup(identifier: string): UUID | undefined {
+    const conversation = window.ConversationController.get(identifier);
+    const uuid = conversation?.get('uuid');
+    if (uuid === undefined) {
+      return undefined;
+    }
+
+    return new UUID(uuid);
+  }
+
+  public static checkedLookup(identifier: string): UUID {
+    const uuid = UUID.lookup(identifier);
+    strictAssert(
+      uuid !== undefined,
+      `Conversation ${identifier} not found or has no uuid`
+    );
+    return uuid;
+  }
+}