Disallow interactions by blocked users; new "get objections" Members API route (#8755)

* Make flags.chatRevoked prevent sending private messages (issue #7971)

* Disallow sending gems when messages aren't allowed.

* Created function to check for objections to an interaction to user model and wired it into the API (issue #7971)

* Fixes for issues raised by reviewers.

* Added allowed values to apidoc for api.getObjectionsToInteraction.

* Refactoring of getObjectionsToInteraction and minor API changes.

* fix(objections): address PR comments

* fix(strings): use US English for base edits

* refactor(test): typos and phrasing

test/api/v3/integration/chat/POST-chat.test.js

@@ -70,9 +70,9 @@ describe('POST /chat', () => {
   it('returns an error when chat privileges are revoked when sending a message to a public guild', async () => {
     let userWithChatRevoked = await member.update({'flags.chatRevoked': true});
     await expect(userWithChatRevoked.post(`/groups/${groupWithChat._id}/chat`, { message: testMessage})).to.eventually.be.rejected.and.eql({
-      code: 404,
-      error: 'NotFound',
-      message: 'Your chat privileges have been revoked.',
+      code: 401,
+      error: 'NotAuthorized',
+      message: t('chatPrivilegesRevoked'),
     });
   });
 

test/api/v3/integration/members/GET-objections_interaction.test.js

@@ -0,0 +1,64 @@
+import {
+  generateUser,
+  translate as t,
+} from '../../../../helpers/api-v3-integration.helper';
+import { v4 as generateUUID } from 'uuid';
+
+describe('GET /members/:toUserId/objections/:interaction', () => {
+  let user;
+
+  before(async () => {
+    user = await generateUser();
+  });
+
+  it('validates req.params.memberId', async () => {
+    await expect(
+      user.get('/members/invalidUUID/objections/send-private-message')
+    ).to.eventually.be.rejected.and.eql({
+      code: 400,
+      error: 'BadRequest',
+      message: t('invalidReqParams'),
+    });
+  });
+
+  it('handles non-existing members', async () => {
+    let dummyId = generateUUID();
+    await expect(
+      user.get(`/members/${dummyId}/objections/send-private-message`)
+    ).to.eventually.be.rejected.and.eql({
+      code: 404,
+      error: 'NotFound',
+      message: t('userWithIDNotFound', {userId: dummyId}),
+    });
+  });
+
+  it('handles non-existing interactions', async () => {
+    let receiver = await generateUser();
+
+    await expect(
+      user.get(`/members/${receiver._id}/objections/hug-a-whole-forest-of-trees`)
+    ).to.eventually.be.rejected.and.eql({
+      code: 400,
+      error: 'BadRequest',
+      message: t('invalidReqParams'),
+    });
+  });
+
+  it('returns an empty array if there are no objections', async () => {
+    let receiver = await generateUser();
+
+    await expect(
+      user.get(`/members/${receiver._id}/objections/send-private-message`)
+    ).to.eventually.be.fulfilled.and.eql([]);
+  });
+
+  it('returns an array of objections if any exist', async () => {
+    let receiver = await generateUser({'inbox.blocks': [user._id]});
+
+    await expect(
+      user.get(`/members/${receiver._id}/objections/send-private-message`)
+    ).to.eventually.be.fulfilled.and.eql([
+      t('notAuthorizedToSendMessageToThisUser'),
+    ]);
+  });
+});

test/api/v3/integration/members/POST-send_private_message.test.js

@@ -82,6 +82,20 @@ describe('POST /members/send-private-message', () => {
     });
   });
 
+  it('returns an error when chat privileges are revoked', async () => {
+    let userWithChatRevoked = await generateUser({'flags.chatRevoked': true});
+    let receiver = await generateUser();
+
+    await expect(userWithChatRevoked.post('/members/send-private-message', {
+      message: messageToSend,
+      toUserId: receiver._id,
+    })).to.eventually.be.rejected.and.eql({
+      code: 401,
+      error: 'NotAuthorized',
+      message: t('chatPrivilegesRevoked'),
+    });
+  });
+
   it('sends a private message to a user', async () => {
     let receiver = await generateUser();
 

test/api/v3/integration/members/POST-transfer_gems.test.js

@@ -43,7 +43,7 @@ describe('POST /members/transfer-gems', () => {
     });
   });
 
-  it('returns error when to user is not found', async () => {
+  it('returns error when recipient is not found', async () => {
     await expect(userToSendMessage.post('/members/transfer-gems', {
       message,
       gemAmount,
@@ -55,7 +55,7 @@ describe('POST /members/transfer-gems', () => {
     });
   });
 
-  it('returns error when to user attempts to send gems to themselves', async () => {
+  it('returns error when user attempts to send gems to themselves', async () => {
     await expect(userToSendMessage.post('/members/transfer-gems', {
       message,
       gemAmount,
@@ -67,6 +67,64 @@ describe('POST /members/transfer-gems', () => {
     });
   });
 
+  it('returns error when recipient has blocked the sender', async () => {
+    let receiverWhoBlocksUser = await generateUser({'inbox.blocks': [userToSendMessage._id]});
+
+    await expect(userToSendMessage.post('/members/transfer-gems', {
+      message,
+      gemAmount,
+      toUserId: receiverWhoBlocksUser._id,
+    })).to.eventually.be.rejected.and.eql({
+      code: 401,
+      error: 'NotAuthorized',
+      message: t('notAuthorizedToSendMessageToThisUser'),
+    });
+  });
+
+  it('returns error when sender has blocked recipient', async () => {
+    let sender = await generateUser({'inbox.blocks': [receiver._id]});
+
+    await expect(sender.post('/members/transfer-gems', {
+      message,
+      gemAmount,
+      toUserId: receiver._id,
+    })).to.eventually.be.rejected.and.eql({
+      code: 401,
+      error: 'NotAuthorized',
+      message: t('notAuthorizedToSendMessageToThisUser'),
+    });
+  });
+
+  it('returns an error when chat privileges are revoked', async () => {
+    let userWithChatRevoked = await generateUser({'flags.chatRevoked': true});
+
+    await expect(userWithChatRevoked.post('/members/transfer-gems', {
+      message,
+      gemAmount,
+      toUserId: receiver._id,
+    })).to.eventually.be.rejected.and.eql({
+      code: 401,
+      error: 'NotAuthorized',
+      message: t('chatPrivilegesRevoked'),
+    });
+  });
+
+  it('works when only the recipient\'s chat privileges are revoked', async () => {
+    let receiverWithChatRevoked = await generateUser({'flags.chatRevoked': true});
+
+    await expect(userToSendMessage.post('/members/transfer-gems', {
+      message,
+      gemAmount,
+      toUserId: receiverWithChatRevoked._id,
+    })).to.eventually.be.fulfilled;
+
+    let updatedReceiver = await receiverWithChatRevoked.get('/user');
+    let updatedSender = await userToSendMessage.get('/user');
+
+    expect(updatedReceiver.balance).to.equal(gemAmount / 4);
+    expect(updatedSender.balance).to.equal(0);
+  });
+
   it('returns error when there is no gemAmount', async () => {
     await expect(userToSendMessage.post('/members/transfer-gems', {
       message,
@@ -144,7 +202,7 @@ describe('POST /members/transfer-gems', () => {
     expect(updatedSender.balance).to.equal(0);
   });
 
-  it('does not requrie a message', async () => {
+  it('does not require a message', async () => {
     await userToSendMessage.post('/members/transfer-gems', {
       gemAmount,
       toUserId: receiver._id,

website/common/locales/en/groups.json

@@ -209,6 +209,7 @@
   "onlyCreatorOrAdminCanDeleteChat": "Not authorized to delete this message!",
   "onlyGroupLeaderCanEditTasks": "Not authorized to manage tasks!",
   "onlyGroupTasksCanBeAssigned": "Only group tasks can be assigned",
+  "chatPrivilegesRevoked": "Your chat privileges have been revoked.",
   "newChatMessagePlainNotification": "New message in <%= groupName %> by <%= authorName %>. Click here to open the chat page!",
   "newChatMessageTitle": "New message in <%= groupName %>",
   "exportInbox": "Export Messages",

website/server/controllers/api-v3/chat.js

@@ -117,8 +117,6 @@ function textContainsBannedWords (message) {
  * @apiParam (Body) {String} message Message The message to post
  * @apiParam (Query) {UUID} previousMsg The previous chat message's UUID which will force a return of the full group chat
  *
- * @apiSuccess data An array of <a href='https://github.com/HabitRPG/habitica/blob/develop/website/server/models/group.js#L51' target='_blank'>chat messages</a> if a new message was posted after previousMsg, otherwise the posted message
- *
  * @apiUse GroupNotFound
  * @apiUse GroupIdRequired
  * @apiError (400) {NotFound} ChatPriviledgesRevoked Your chat privileges have been revoked
@@ -143,7 +141,7 @@ api.postChat = {
 
     if (!group) throw new NotFound(res.t('groupNotFound'));
     if (group.privacy !== 'private' && user.flags.chatRevoked) {
-      throw new NotFound('Your chat privileges have been revoked.');
+      throw new NotAuthorized(res.t('chatPrivilegesRevoked'));
     }
 
     if (group._id === TAVERN_ID && textContainsBannedWords(req.body.message)) {

website/server/controllers/api-v3/members.js

@@ -4,6 +4,9 @@ import {
   publicFields as memberFields,
   nameFields,
 } from '../../models/user';
+import {
+  KNOWN_INTERACTIONS,
+} from '../../models/user/methods';
 import { model as Group } from '../../models/group';
 import { model as Challenge } from '../../models/challenge';
 import {
@@ -385,6 +388,39 @@ api.getChallengeMemberProgress = {
   },
 };
 
+/**
+ * @api {get} /api/v3/members/:toUserId/objections/:interaction Get any objections that would occur if the given interaction was attempted - BETA
+ * @apiVersion 3.0.0
+ * @apiName GetObjectionsToInteraction
+ * @apiGroup Member
+ *
+ * @apiParam {UUID} toUserId The user to interact with
+ * @apiParam {String="send-private-message","transfer-gems"} interaction Name of the interaction to query
+ *
+ * @apiSuccess {Array} data Return an array of objections, if the interaction would be blocked; otherwise an empty array
+ */
+api.getObjectionsToInteraction = {
+  method: 'GET',
+  url: '/members/:toUserId/objections/:interaction',
+  middlewares: [authWithHeaders()],
+  async handler (req, res) {
+    req.checkParams('toUserId', res.t('toUserIDRequired')).notEmpty().isUUID();
+    req.checkParams('interaction', res.t('interactionRequired')).notEmpty().isIn(KNOWN_INTERACTIONS);
+
+    let validationErrors = req.validationErrors();
+    if (validationErrors) throw validationErrors;
+
+    let sender = res.locals.user;
+    let receiver = await User.findById(req.params.toUserId).exec();
+    if (!receiver) throw new NotFound(res.t('userWithIDNotFound', {userId: req.params.toUserId}));
+
+    let interaction = req.params.interaction;
+    let response = sender.getObjectionsToInteraction(interaction, receiver);
+
+    res.respond(200, response.map(res.t));
+  },
+};
+
 /**
  * @api {posts} /api/v3/members/send-private-message Send a private message to a member
  * @apiName SendPrivateMessage
@@ -410,17 +446,11 @@ api.sendPrivateMessage = {
 
     let sender = res.locals.user;
     let message = req.body.message;
-
     let receiver = await User.findById(req.body.toUserId).exec();
     if (!receiver) throw new NotFound(res.t('userNotFound'));
 
-    let userBlockedSender = receiver.inbox.blocks.indexOf(sender._id) !== -1;
-    let userIsBlockBySender = sender.inbox.blocks.indexOf(receiver._id) !== -1;
-    let userOptedOutOfMessaging = receiver.inbox.optOut;
-
-    if (userBlockedSender || userIsBlockBySender || userOptedOutOfMessaging) {
-      throw new NotAuthorized(res.t('notAuthorizedToSendMessageToThisUser'));
-    }
+    let objections = sender.getObjectionsToInteraction('send-private-message', receiver);
+    if (objections.length > 0) throw new NotAuthorized(res.t(objections[0]));
 
     await sender.sendMessage(receiver, { receiverMsg: message });
 
@@ -472,13 +502,11 @@ api.transferGems = {
     if (validationErrors) throw validationErrors;
 
     let sender = res.locals.user;
-
     let receiver = await User.findById(req.body.toUserId).exec();
     if (!receiver) throw new NotFound(res.t('userNotFound'));
 
-    if (receiver._id === sender._id) {
-      throw new NotAuthorized(res.t('cannotSendGemsToYourself'));
-    }
+    let objections = sender.getObjectionsToInteraction('transfer-gems', receiver);
+    if (objections.length > 0) throw new NotAuthorized(res.t(objections[0]));
 
     let gemAmount = req.body.gemAmount;
     let amount = gemAmount / 4;

website/server/models/user/methods.js

@@ -5,7 +5,7 @@ import {
   chatDefaults,
   TAVERN_ID,
 } from '../group';
-import { defaults } from 'lodash';
+import { defaults, map, flatten, flow, compact, uniq, partialRight } from 'lodash';
 import { model as UserNotification } from '../userNotification';
 import schema from './schema';
 import payments from '../../libs/payments';
@@ -33,6 +33,56 @@ schema.methods.getGroups = function getUserGroups () {
   return userGroups;
 };
 
+/* eslint-disable no-unused-vars */ // The checks below all get access to sndr and rcvr, but not all use both
+const INTERACTION_CHECKS = Object.freeze({
+  always: [
+    // Revoked chat privileges block all interactions to prevent the evading of harassment protections
+    // See issue #7971 for some discussion
+    (sndr, rcvr) => sndr.flags.chatRevoked && 'chatPrivilegesRevoked',
+
+    // Direct user blocks prevent all interactions
+    (sndr, rcvr) => rcvr.inbox.blocks.includes(sndr._id) && 'notAuthorizedToSendMessageToThisUser',
+    (sndr, rcvr) => sndr.inbox.blocks.includes(rcvr._id) && 'notAuthorizedToSendMessageToThisUser',
+  ],
+
+  'send-private-message': [
+    // Private messaging has an opt-out, which does not affect other interactions
+    (sndr, rcvr) => rcvr.inbox.optOut && 'notAuthorizedToSendMessageToThisUser',
+
+    // We allow a player to message themselves so they can test how PMs work or send their own notes to themselves
+  ],
+
+  'transfer-gems': [
+    // Unlike private messages, gems can't be sent to oneself
+    (sndr, rcvr) => rcvr._id === sndr._id && 'cannotSendGemsToYourself',
+  ],
+});
+/* eslint-enable no-unused-vars */
+
+export const KNOWN_INTERACTIONS = Object.freeze(Object.keys(INTERACTION_CHECKS).filter(key => key !== 'always'));
+
+// Get an array of error message keys that would be thrown if the given interaction was attempted
+schema.methods.getObjectionsToInteraction = function getObjectionsToInteraction (interaction, receiver) {
+  if (!KNOWN_INTERACTIONS.includes(interaction)) {
+    throw new Error(`Unknown kind of interaction: "${interaction}", expected one of ${KNOWN_INTERACTIONS.join(', ')}`);
+  }
+
+  let sender = this;
+  let checks = [
+    INTERACTION_CHECKS.always,
+    INTERACTION_CHECKS[interaction],
+  ];
+
+  let executeChecks = partialRight(map, (check) => check(sender, receiver));
+
+  return flow(
+    flatten,
+    executeChecks,
+    compact, // Remove passed checks (passed checks return falsy; failed checks return message keys)
+    uniq
+  )(checks);
+};
+
 
 /**
  * Sends a message to a user. Archives a copy in sender's inbox.