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// @flow
import type { GraphQLContext } from '../../';
import UserError from '../../utils/UserError';
import {
getMessage,
deleteMessage,
userHasMessagesInThread,
} from '../../models/message';
import { deleteParticipantInThread } from '../../models/usersThreads';
import { getUserPermissionsInChannel } from '../../models/usersChannels';
import { getUserPermissionsInCommunity } from '../../models/usersCommunities';
import { isAuthedResolver as requireAuth } from '../../utils/permissions';
type Input = {
id: string,
};
export default requireAuth(async (_: any, args: Input, ctx: GraphQLContext) => {
const { id } = args;
const { user, loaders } = ctx;
const message = await getMessage(id);
if (!message) {
return new UserError('This message does not exist.');
}
const thread = await loaders.thread.load(message.threadId);
if (message.senderId !== user.id) {
// Only the sender can delete a directMessageThread message
if (message.threadType === 'directMessageThread') {
return new UserError('You can only delete your own messages.');
}
const [communityPermissions, channelPermissions] = await Promise.all([
getUserPermissionsInCommunity(thread.communityId, user.id),
getUserPermissionsInChannel(thread.channelId, user.id),
]);
const canModerate =
channelPermissions.isOwner ||
communityPermissions.isOwner ||
channelPermissions.isModerator ||
communityPermissions.isModerator;
if (!canModerate) {
return new UserError("You don't have permission to delete this message.");
}
}
// Delete message and remove participant from thread if it's the only message from that person
return deleteMessage(user.id, id)
.then(async () => {
// We don't need to delete participants of direct message threads
if (message.threadType === 'directMessageThread') return true;
const hasMoreMessages = await userHasMessagesInThread(
message.threadId,
message.senderId
);
if (hasMoreMessages) return;
return await deleteParticipantInThread(
message.threadId,
message.senderId
);
})
.then(() => true);
});
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