Add messaging

src/services/channel/channel.ts

@@ -1,5 +1,5 @@
 import { API_ERROR } from "../../controllers/errors.js";
-import type { Channel } from "../../generated/prisma/client.js";
+import type { Channel, Message } from "../../generated/prisma/client.js";
 import { getDB } from "../../store/store.js";
 import { getUserFromAuth, isUserAllowed } from "../auth/helpers.js";
 import { PERMISSION } from "../auth/permission.js";
@@ -136,6 +136,40 @@ const deleteChannelByIdAuth = async (
     return await deleteChannelById(id);
 };
 
+const getChannelMessagesById = async (
+    id: string,
+): Promise<Message[] | null> => {
+    return await getDB().message.findMany({
+        where: {
+            channelId: id,
+        },
+    });
+};
+
+const getChannelMessagesByIdAuth = async (
+    id: string,
+    authHeader: string | undefined,
+): Promise<Message[] | null | API_ERROR.ACCESS_DENIED> => {
+    const authUser = await getUserFromAuth(authHeader);
+    const channel = await getChannelById(id);
+    const community = await getCommunityById(channel?.communityId ?? "");
+
+    if (
+        !(await isUserAllowed(
+            authUser,
+            {
+                community: community,
+            },
+            community,
+            [PERMISSION.MESSAGES_READ],
+        ))
+    ) {
+        return API_ERROR.ACCESS_DENIED;
+    }
+
+    return await getChannelMessagesById(id);
+};
+
 export {
     getChannelById,
     getChannelByIdAuth,
@@ -145,4 +179,6 @@ export {
     updateChannelByIdAuth,
     deleteChannelById,
     deleteChannelByIdAuth,
+    getChannelMessagesById,
+    getChannelMessagesByIdAuth,
 };