chats: mint URI for messages document

Author: angelo-v

chats/rdflib/src/module/ChatsModuleRdfLib.ts

@@ -18,6 +18,7 @@ import { createChat } from "./update-operations/index.js";
 import { ChatQuery } from "./queries/index.js";
 import { MessagesDocumentQuery } from "./queries/MessagesDocumentQuery.js";
 import { DateContainerQuery } from "./queries/DateContainerQuery.js";
+import { mintMessageUri } from './uris/index.js';
 
 interface ModuleConfig {
   store: IndexedFormula;
@@ -101,7 +102,7 @@ export class ChatsModuleRdfLib implements ChatsModule {
   }
 
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
-  postMessage(command: PostMessageCommand): Promise<string> {
-    throw new Error("Method not implemented.");
+  async postMessage({ chatUri }: PostMessageCommand): Promise<string> {
+    return mintMessageUri(sym(chatUri));
   }
 }

chats/rdflib/src/module/_integration-tests/post-message.integration.spec.ts

@@ -0,0 +1,46 @@
+import { setupModule } from "../../test-support/setupModule";
+import { generateId } from "@solid-data-modules/rdflib-utils/identifier";
+import { when } from "jest-when";
+import { mockTurtleDocument } from "@solid-data-modules/rdflib-utils/test-support";
+
+jest.mock("@solid-data-modules/rdflib-utils/identifier");
+
+describe("post message", () => {
+  it("creates the message in a document for the current date and returns the minted URI", async () => {
+    // given a random ID is generated
+    when(generateId).mockReturnValue("8c615b");
+
+    // and today is a specific date
+    jest.useFakeTimers({
+      now: new Date("2024-07-30"),
+    });
+
+    // and a chats module
+    const authenticatedFetch = jest.fn();
+    const chats = setupModule(authenticatedFetch);
+
+    // and an existing chat document
+    mockTurtleDocument(
+      authenticatedFetch,
+      "https://pod.test/alice/chats/abc123/index.ttl",
+      `
+      <#this> a <http://www.w3.org/ns/pim/meeting#LongChat>;
+    <http://purl.org/dc/elements/1.1/title> "An existing chat channel".
+        `,
+    );
+
+    // when a message is posted to the chat
+    const uri = await chats.postMessage({
+      chatUri: "https://pod.test/alice/chats/abc123/index.ttl#this",
+      text: "A new message",
+      authorWebId: "https://pod.test/alice/profile/card#me",
+    });
+
+    // then the minted URI is returned
+    expect(uri).toMatch(
+      new RegExp(
+        "https://pod.test/alice/chats/abc123/2024/07/30/chat.ttl#8c615b",
+      ),
+    );
+  });
+});

chats/rdflib/src/module/uris/index.ts

@@ -0,0 +1 @@
+export { mintMessageUri } from './mintMessageUri.js';

chats/rdflib/src/module/uris/mintMessageUri.spec.ts

@@ -0,0 +1,48 @@
+import { generateId } from "@solid-data-modules/rdflib-utils/identifier";
+import { when } from "jest-when";
+import { mintMessageUri } from "./mintMessageUri";
+import { sym } from "rdflib";
+
+jest.mock("@solid-data-modules/rdflib-utils/identifier");
+
+describe("mintMessageUri", () => {
+  it("creates a new URI based on the chat container, the current date and a random ID", () => {
+    // given a random ID is generated
+    when(generateId).mockReturnValue("qwerty123");
+
+    // and today is this date
+    jest.useFakeTimers({
+      now: new Date("2024-08-15"),
+    });
+
+    // and a chat node
+
+    const chatNode = sym("https://pod.test/chat/123/index.ttl#this");
+
+    // when a URI for a message is minted
+    const result = mintMessageUri(chatNode);
+
+    // then
+    expect(result).toEqual(
+      "https://pod.test/chat/123/2024/08/15/chat.ttl#qwerty123",
+    );
+  });
+
+  it("fails if chat has no container", () => {
+    // given a random ID is generated
+    when(generateId).mockReturnValue("qwerty123");
+
+    // and today is this date
+    jest.useFakeTimers({
+      now: new Date("2024-08-15"),
+    });
+
+    // and a chat node
+    const chatNode = sym("https://pod.test");
+
+    // when a URI for a message is minted
+    expect(() => mintMessageUri(chatNode)).toThrow(
+      new Error("Chat https://pod.test has no container"),
+    );
+  });
+});

chats/rdflib/src/module/uris/mintMessageUri.ts

@@ -0,0 +1,12 @@
+import { NamedNode } from "rdflib";
+import { generateId } from "@solid-data-modules/rdflib-utils/identifier";
+
+export function mintMessageUri(chatNode: NamedNode) {
+  const date = new Date();
+  const dateFolders = date.toISOString().split("T")[0].replace(/-/g, "/");
+  const container = chatNode.doc().dir();
+  if (!container) {
+    throw new Error(`Chat ${chatNode.uri} has no container`);
+  }
+  return container.uri + dateFolders + "/chat.ttl#" + generateId();
+}