feat(db & e2e): Enhance DB Schemas/Controllers and Improve E2E Tests (#966)

* feat: add global teardown to remove test data and add registration/log-out to auth flow

* refactor(models/Conversation): index user field and add JSDoc to deleteConvos

* refactor: add user index to message schema and ensure user is saved to each Message

* refactor: add user to each saveMessage call

* fix: handle case where title is null in zod schema

* feat(e2e): ensure messages are deleted on cleanUp

* fix: set last convo for all endpoints on conversation update

* fix: enable registration for CI env

api/models/Conversation.js

@@ -108,6 +108,23 @@ module.exports = {
       return { message: 'Error getting conversation title' };
     }
   },
+  /**
+   * Asynchronously deletes conversations and associated messages for a given user and filter.
+   *
+   * @async
+   * @function
+   * @param {string|ObjectId} user - The user's ID.
+   * @param {Object} filter - Additional filter criteria for the conversations to be deleted.
+   * @returns {Promise<{ n: number, ok: number, deletedCount: number, messages: { n: number, ok: number, deletedCount: number } }>}
+   *          An object containing the count of deleted conversations and associated messages.
+   * @throws {Error} Throws an error if there's an issue with the database operations.
+   *
+   * @example
+   * const user = 'someUserId';
+   * const filter = { someField: 'someValue' };
+   * const result = await deleteConvos(user, filter);
+   * console.log(result); // { n: 5, ok: 1, deletedCount: 5, messages: { n: 10, ok: 1, deletedCount: 10 } }
+   */
   deleteConvos: async (user, filter) => {
     let toRemove = await Conversation.find({ ...filter, user }).select('conversationId');
     const ids = toRemove.map((instance) => instance.conversationId);

api/models/Message.js

@@ -7,6 +7,7 @@ module.exports = {
   Message,
 
   async saveMessage({
+    user,
     messageId,
     newMessageId,
     conversationId,
@@ -33,6 +34,7 @@ module.exports = {
       await Message.findOneAndUpdate(
         { messageId },
         {
+          user,
           messageId: newMessageId || messageId,
           conversationId,
           parentMessageId,

api/models/schema/convoSchema.js

@@ -17,6 +17,7 @@ const convoSchema = mongoose.Schema(
     },
     user: {
       type: String,
+      index: true,
       default: null,
     },
     messages: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Message' }],

api/models/schema/messageSchema.js

@@ -14,6 +14,11 @@ const messageSchema = mongoose.Schema(
       required: true,
       meiliIndex: true,
     },
+    user: {
+      type: String,
+      index: true,
+      default: null,
+    },
     model: {
       type: String,
     },