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{"version":3,"file":"message_drawer_view_conversation.min.js","sources":["../src/message_drawer_view_conversation.js"],"sourcesContent":["// This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * Controls the conversation page in the message drawer.\n *\n * This function handles all of the user actions that the user can take\n * when interacting with the conversation page.\n *\n * It maintains a view state which is a data representation of the view\n * and only operates on that data.\n *\n * The view state is immutable and should never be modified directly. Instead\n * all changes to the view state should be done using the StateManager which\n * will generate a new version of the view state with the requested changes.\n *\n * After any changes to the view state the module will call the render function\n * to ask the renderer to update the UI.\n *\n * General rules for this module:\n * 1.) Never modify viewState directly. All changes should be via the StateManager.\n * 2.) Call render() with the new state when you want to update the UI\n * 3.) Never modify the UI directly in this module. This module is only concerned\n * with the data in the view state.\n *\n * The general flow for a user interaction will be something like:\n * User interaction: User clicks \"confirm block\" button to block the other user\n * 1.) This module is hears the click\n * 2.) This module sends a request to the server to block the user\n * 3.) The server responds with the new user profile\n * 4.) This module generates a new state using the StateManager with the updated\n * user profile.\n * 5.) This module asks the Patcher to generate a patch from the current state and\n * the newly generated state. This patch tells the renderer what has changed\n * between the states.\n * 6.) This module gives the Renderer the generated patch. The renderer updates\n * the UI with changes according to the patch.\n *\n * @module core_message/message_drawer_view_conversation\n * @copyright 2018 Ryan Wyllie <ryan@moodle.com>\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\ndefine(\n[\n 'jquery',\n 'core/auto_rows',\n 'core/backoff_timer',\n 'core/custom_interaction_events',\n 'core/notification',\n 'core/pending',\n 'core/pubsub',\n 'core/str',\n 'core_message/message_repository',\n 'core_message/message_drawer_events',\n 'core_message/message_drawer_view_conversation_constants',\n 'core_message/message_drawer_view_conversation_patcher',\n 'core_message/message_drawer_view_conversation_renderer',\n 'core_message/message_drawer_view_conversation_state_manager',\n 'core_message/message_drawer_router',\n 'core_message/message_drawer_routes',\n 'core/emoji/auto_complete',\n 'core/emoji/picker'\n],\nfunction(\n $,\n AutoRows,\n BackOffTimer,\n CustomEvents,\n Notification,\n Pending,\n PubSub,\n Str,\n Repository,\n MessageDrawerEvents,\n Constants,\n Patcher,\n Renderer,\n StateManager,\n MessageDrawerRouter,\n MessageDrawerRoutes,\n initialiseEmojiAutoComplete,\n initialiseEmojiPicker\n) {\n\n // Contains a cache of all view states that have been loaded so far\n // which saves us having to reload stuff with network requests when\n // switching between conversations.\n var stateCache = {};\n // The currentdata representation of the view.\n var viewState = null;\n var loadedAllMessages = false;\n var messagesOffset = 0;\n var newMessagesPollTimer = null;\n var isRendering = false;\n var renderBuffer = [];\n // If the UI is currently resetting.\n var isResetting = true;\n // If the UI is currently sending a message.\n var isSendingMessage = false;\n // If the UI is currently deleting a conversation.\n var isDeletingConversationContent = false;\n // A buffer of messages to send.\n var sendMessageBuffer = [];\n // These functions which will be generated when this module is\n // first called. See generateRenderFunction for details.\n var render = null;\n // The list of renderers that have been registered to render\n // this conversation. See generateRenderFunction for details.\n var renderers = [];\n\n var NEWEST_FIRST = Constants.NEWEST_MESSAGES_FIRST;\n var LOAD_MESSAGE_LIMIT = Constants.LOAD_MESSAGE_LIMIT;\n var MILLISECONDS_IN_SEC = Constants.MILLISECONDS_IN_SEC;\n var SELECTORS = Constants.SELECTORS;\n var CONVERSATION_TYPES = Constants.CONVERSATION_TYPES;\n\n /**\n * Get the other user userid.\n *\n * @return {Number} Userid.\n */\n var getOtherUserId = function() {\n if (!viewState || viewState.type == CONVERSATION_TYPES.PUBLIC) {\n return null;\n }\n\n var loggedInUserId = viewState.loggedInUserId;\n if (viewState.type == CONVERSATION_TYPES.SELF) {\n // It's a self-conversation, so the other user is the one logged in.\n return loggedInUserId;\n }\n\n var otherUserIds = Object.keys(viewState.members).filter(function(userId) {\n return loggedInUserId != userId;\n });\n\n return otherUserIds.length ? otherUserIds[0] : null;\n };\n\n /**\n * Search the cache to see if we've already loaded a private conversation\n * with the given user id.\n *\n * @param {Number} userId The id of the other user.\n* @return {Number|null} Conversation id.\n */\n var getCachedPrivateConversationIdFromUserId = function(userId) {\n return Object.keys(stateCache).reduce(function(carry, id) {\n if (!carry) {\n var state = stateCache[id].state;\n\n if (state.type != CONVERSATION_TYPES.PUBLIC) {\n if (userId in state.members) {\n // We've found a cached conversation for this user!\n carry = state.id;\n }\n }\n }\n\n return carry;\n }, null);\n };\n\n /**\n * Get profile info for logged in user.\n *\n * @param {Object} body Conversation body container element.\n * @return {Object}\n */\n var getLoggedInUserProfile = function(body) {\n return {\n id: parseInt(body.attr('data-user-id'), 10),\n fullname: null,\n profileimageurl: null,\n profileimageurlsmall: null,\nisonline: null,\n showonlinestatus: null,\n isblocked: null,\n iscontact: null,\n isdeleted: null,\n canmessage: null,\n canmessageevenifblocked: null,\n requirescontact: null,\n contactrequests: [],\n cancreatecontact: null,\n };\n };\n\n /**\n * Get the messages offset value to load more messages.\n *\n * @return {Number}\n */\n var getMessagesOffset = function() {\n return messagesOffset;\n };\n\n /**\n * Set the messages offset value for loading more messages.\n *\n * @param {Number} value The offset value\n */\n var setMessagesOffset = function(value) {\n messagesOffset = value;\n stateCache[viewState.id].messagesOffset = value;\n };\n\n /**\n * Check if all messages have been loaded.\n *\n * @return {Bool}\n */\n var hasLoadedAllMessages = function() {\n return loadedAllMessages;\n };\n\n /**\n * Set whether all messages have been loaded or not.\n *\n * @param {Bool} value If all messages have been loaded.\n */\n var setLoadedAllMessages = function(value) {\n loadedAllMessages = value;\n stateCache[viewState.id].loadedAllMessages = value;\n };\n\n /**\n * Get the messages container element.\n *\n * @param {Object} body Conversation body container element.\n * @return {Object} The messages container element.\n */\n var getMessagesContainer = function(body) {\n return body.find(SELECTORS.MESSAGES_CONTAINER);\n };\n\n /**\n * Reformat the conversation for an event payload.\n *\n * @param {Object} state The view state.\n * @return {Object} New formatted conversation.\n */\n var formatConversationForEvent = function(state) {\n return {\n id: state.id,\n name: state.name,\n subname: state.subname,\n imageUrl: state.imageUrl,\n isFavourite: state.isFavourite,\n isMuted: state.isMuted,\n type: state.type,\n totalMemberCount: state.totalMemberCount,\n loggedInUserId: state.loggedInUserId,\n messages: state.messages.map(function(message) {\n return $.extend({}, message);\n }),\n members: Object.keys(state.members).map(function(id) {\n var formattedMember = $.extend({}, state.members[id]);\n formattedMember.contactrequests = state.members[id].contactrequests.map(function(request) {\n return $.extend({}, request);\n });\n return formattedMember;\n })\n };\n };\n\n /**\n * Load up an empty private conversation between the logged in user and the\n * other user. Sets all of the conversation details based on the other user.\n *\n * A conversation isn't created until the user sends the first message.\n *\n * @param {Object} loggedInUserProfile The logged in user profile.\n * @param {Number} otherUserId The other user id.\n * @return {Object} Profile returned from repository.\n */\n var loadEmptyPrivateConversation = function(loggedInUserProfile, otherUserId) {\n var loggedInUserId = loggedInUserProfile.id;\n // If the other user id is the same as the logged in user then this is a self\n // conversation.\n var conversationType = loggedInUserId == otherUserId ? CONVERSATION_TYPES.SELF : CONVERSATION_TYPES.PRIVATE;\n var newState = StateManager.setLoadingMembers(viewState, true);\n newState = StateManager.setLoadingMessages(newState, true);\n render(newState);\n\n return Repository.getMemberInfo(loggedInUserId, [otherUserId], true, true)\n .then(function(profiles) {\n if (profiles.length) {\n return profiles[0];\n } else {\n throw new Error('Unable to load other user profile');\n}\n })\n .then(function(profile) {\n // If the conversation is a self conversation then the profile loaded is the\n // logged in user so only add that to the members array.\n var members = conversationType == CONVERSATION_TYPES.SELF ? [profile] : [profile, loggedInUserProfile];\n var newState = StateManager.addMembers(viewState, members);\n newState = StateManager.setLoadingMembers(newState, false);\n newState = StateManager.setLoadingMessages(newState, false);\n newState = StateManager.setName(newState, profile.fullname);\n newState = StateManager.setType(newState, conversationType);\n newState = StateManager.setImageUrl(newState, profile.profileimageurl);\n newState = StateManager.setTotalMemberCount(newState, members.length);\n render(newState);\n return profile;\n })\n .catch(function(error) {\n var newState = StateManager.setLoadingMembers(viewState, false);\n render(newState);\n Notification.exception(error);\n });\n };\n\n /**\n * Create a new state from a conversation object.\n *\n * @param {Object} conversation The conversation object.\n * @param {Number} loggedInUserId The logged in user id.\n * @return {Object} new state.\n */\n var updateStateFromConversation = function(conversation, loggedInUserId) {\n var otherUser = null;\n if (conversation.type == CONVERSATION_TYPES.PRIVATE) {\n // For private conversations, remove current logged in user from the members list to get the other user.\n var otherUsers = conversation.members.filter(function(member) {\n return member.id != loggedInUserId;\n });\n otherUser = otherUsers.length ? otherUsers[0] : null;\n } else if (conversation.type == CONVERSATION_TYPES.SELF){\n // Self-conversations have only one member.\n otherUser = conversation.members[0];\n }\n\n var name = conversation.name;\n var imageUrl = conversation.imageurl;\n\n if (conversation.type != CONVERSATION_TYPES.PUBLIC) {\n name = name || otherUser ? otherUser.fullname : '';\n imageUrl = imageUrl || otherUser ? otherUser.profileimageurl : '';\n }\n\n var newState = StateManager.addMembers(viewState, conversation.members);\n newState = StateManager.setName(newState, name);\n newState = StateManager.setSubname(newState, conversation.subname);\n newState = StateManager.setType(newState, conversation.type);\n newState = StateManager.setImageUrl(newState, imageUrl);\n newState = StateManager.setTotalMemberCount(newState, conversation.membercount);\n newState = StateManager.setIsFavourite(newState, conversation.isfavourite);\n newState = StateManager.setIsMuted(newState, conversation.ismuted);\n newState = StateManager.addMessages(newState, conversation.messages);\n newState = StateManager.setCanDeleteMessagesForAllUsers(newState, conversation.candeletemessagesforallusers);\n return newState;\n };\n\n /**\n * Get the details for a conversation from the conversation id.\n *\n * @param {Number} conversationId The conversation id.\n * @param {Object} loggedInUserProfile The logged in user profile.\n * @param {Number} messageLimit The number of messages to include.\n * @param {Number} messageOffset The number of messages to skip.\n * @param {Bool} newestFirst Order messages newest first.\n * @return {Object} Promise resolved when loaded.\n */\n var loadNewConversation = function(\n conversationId,\n loggedInUserProfile,\n messageLimit,\n messageOffset,\n newestFirst\n ) {\n var loggedInUserId = loggedInUserProfile.id;\n var newState = StateManager.setLoadingMembers(viewState, true);\n newState = StateManager.setLoadingMessages(newState, true);\n render(newState);\n\n return Repository.getConversation(\n loggedInUserId,\n conversationId,\n true,\n true,\n 0,\n 0,\n messageLimit + 1,\n messageOffset,\n newestFirst\n )\n .then(function(conversation) {\n if (conversation.messages.length > messageLimit) {\n conversation.messages = conversation.messages.slice(1);\n } else {\n setLoadedAllMessages(true);\n }\n\n setMessagesOffset(messageOffset + messageLimit);\n\n return conversation;\n })\n .then(function(conversation) {\n var hasLoggedInUser = conversation.members.filter(function(member) {\n return member.id == loggedInUserProfile.id;\n });\n\nif (hasLoggedInUser.length < 1) {\n conversation.members = conversation.members.concat([loggedInUserProfile]);\n }\n\n var newState = updateStateFromConversation(conversation, loggedInUserProfile.id);\n newState = StateManager.setLoadingMembers(newState, false);\n newState = StateManager.setLoadingMessages(newState, false);\n return render(newState)\n .then(function() {\n return conversation;\n });\n })\n .then(function() {\n return markConversationAsRead(conversationId);\n })\n .catch(function(error) {\n var newState = StateManager.setLoadingMembers(viewState, false);\n newState = StateManager.setLoadingMessages(newState, false);\n render(newState);\n Notification.exception(error);\n });\n };\n\n /**\n * Get the details for a conversation from and existing conversation object.\n *\n * @param {Object} conversation The conversation object.\n * @param {Object} loggedInUserProfile The logged in user profile.\n * @param {Number} messageLimit The number of messages to include.\n * @param {Bool} newestFirst Order messages newest first.\n * @return {Object} Promise resolved when loaded.\n */\n var loadExistingConversation = function(\n conversation,\n loggedInUserProfile,\n messageLimit,\n newestFirst\n ) {\n var hasLoggedInUser = conversation.members.filter(function(member) {\n return member.id == loggedInUserProfile.id;\n });\n\n if (hasLoggedInUser.length < 1) {\n conversation.members = conversation.members.concat([loggedInUserProfile]);\n }\n\n var messageCount = conversation.messages.length;\n var hasLoadedEnoughMessages = messageCount >= messageLimit;\n var newState = updateStateFromConversation(conversation, loggedInUserProfile.id);\n newState = StateManager.setLoadingMembers(newState, false);\n newState = StateManager.setLoadingMessages(newState, !hasLoadedEnoughMessages);\n var renderPromise = render(newState);\n\n return renderPromise.then(function() {\n if (!hasLoadedEnoughMessages) {\n // We haven't got enough messages so let's load some more.\n return loadMessages(conversation.id, messageLimit, messageCount, newestFirst, []);\n } else {\n // We've got enough messages. No need to load any more for now.\n return {messages: conversation.messages};\n }\n })\n .then(function() {\n var messages = viewState.messages;\n // Update the offset to reflect the number of messages we've loaded.\n setMessagesOffset(messages.length);\n markConversationAsRead(viewState.id);\n\n return messages;\n })\n .catch(Notification.exception);\n };\n\n /**\n * Load messages for this conversation and pass them to the renderer.\n *\n * @param {Number} conversationId Conversation id.\n * @param {Number} limit Number of messages to load.\n * @param {Number} offset Get messages from offset.\n * @param {Bool} newestFirst Get newest messages first.\n * @param {Array} ignoreList Ignore any messages with ids in this list.\n * @param {Number|null} timeFrom Only get messages from this time onwards.\n * @return {Promise} renderer promise.\n */\n var loadMessages = function(conversationId, limit, offset, newestFirst, ignoreList, timeFrom) {\n return Repository.getMessages(\n viewState.loggedInUserId,\n conversationId,\n limit ? limit + 1 : limit,\n offset,\n newestFirst,\n timeFrom\n )\n .then(function(result) {\n // Prevent older requests from contaminating the current view.\n if (result.id != viewState.id) {\n result.messages = [];\n // Purge old conversation cache to prevent messages lose.\n if (result.id in stateCache) {\n delete stateCache[result.id];\n }\n }\n\n return result;\n })\n .then(function(result) {\n if (result.messages.length && ignoreList.length) {\n result.messages = result.messages.filter(function(message) {\n // Skip any messages in our ignore list.\n return ignoreList.indexOf(parseInt(message.id, 10)) < 0;\n });\n }\n\n return result;\n })\n .then(function(result) {\n if (!limit) {\n return result;\n} else if (result.messages.length > limit) {\n // Ignore the last result which was just to test if there are more\n // to load.\n result.messages = result.messages.slice(0, -1);\n } else {\n setLoadedAllMessages(true);\n }\n\n return result;\n })\n .then(function(result) {\n var membersToAdd = result.members.filter(function(member) {\n return !(member.id in viewState.members);\n });\n var newState = StateManager.addMembers(viewState, membersToAdd);\n newState = StateManager.addMessages(newState, result.messages);\n newState = StateManager.setLoadingMessages(newState, false);\n return render(newState)\n .then(function() {\n return result;\n });\n })\n .catch(function(error) {\nvar newState = StateManager.setLoadingMessages(viewState, false);\n render(newState);\n // Re-throw the error for other error handlers.\n throw error;\n });\n };\n\n /**\n * Create a callback function for getting new messages for this conversation.\n *\n * @param {Number} conversationId Conversation id.\n * @param {Bool} newestFirst Show newest messages first\n * @return {Function} Callback function that returns a renderer promise.\n */\n var getLoadNewMessagesCallback = function(conversationId, newestFirst) {\n return function() {\n var messages = viewState.messages;\n var mostRecentMessage = messages.length ? messages[messages.length - 1] : null;\n var lastTimeCreated = mostRecentMessage ? mostRecentMessage.timeCreated : null;\n\n if (lastTimeCreated && !isResetting && !isSendingMessage && !isDeletingConversationContent) {\n // There may be multiple messages with the same time created value since\n // the accuracy is only down to the second. The server will include these\n // messages in the result (since it does a >= comparison on time from) so\n // we need to filter them back out of the result so that we're left only\n // with the new messages.\n var ignoreMessageIds = [];\n for (var i = messages.length - 1; i >= 0; i--) {\n var message = messages[i];\n if (message.timeCreated === lastTimeCreated) {\n ignoreMessageIds.push(message.id);\n } else {\n // Since the messages are ordered in ascending order of time created\n // we can break as soon as we hit a message with a different time created\n // because we know all other messages will have lower values.\n break;\n}\n }\n\n return loadMessages(\n conversationId,\n 0,\n 0,\n newestFirst,\n ignoreMessageIds,\n lastTimeCreated\n )\n .then(function(result) {\n if (result.messages.length) {\n // If we found some results then restart the polling timer\n // because the other user might be sending messages.\n newMessagesPollTimer.restart();\n // We've also got a new last message so publish that for other\n // components to update.\n var conversation = formatConversationForEvent(viewState);\n PubSub.publish(MessageDrawerEvents.CONVERSATION_NEW_LAST_MESSAGE, conversation);\n return markConversationAsRead(conversationId);\n } else {\n return result;\n }\n });\n }\n\n return $.Deferred().resolve().promise();\n };\n };\n\n /**\n * Mark a conversation as read.\n *\n * @param {Number} conversationId The conversation id.\n * @return {Promise} The renderer promise.\n */\n var markConversationAsRead = function(conversationId) {\n var loggedInUserId = viewState.loggedInUserId;\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:markConversationAsRead');\n\n return Repository.markAllConversationMessagesAsRead(loggedInUserId, conversationId)\n .then(function() {\n var newState = StateManager.markMessagesAsRead(viewState, viewState.messages);\n PubSub.publish(MessageDrawerEvents.CONVERSATION_READ, conversationId);\n return render(newState);\n})\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Tell the statemanager there is request to block a user and run the renderer\n * to show the block user dialogue.\n *\n * @param {Number} userId User id.\n */\n var requestBlockUser = function(userId) {\n cancelRequest(userId);\n var newState = StateManager.addPendingBlockUsersById(viewState, [userId]);\n render(newState);\n };\n\n /**\n * Send the repository a request to block a user, update the statemanager and publish\n * a contact has been blocked.\n *\n * @param {Number} userId User id of user to block.\n * @return {Promise} Renderer promise.\n */\n var blockUser = function(userId) {\n var newState = StateManager.setLoadingConfirmAction(viewState, true);\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:blockUser');\n\nrender(newState);\n\n return Repository.blockUser(viewState.loggedInUserId, userId)\n .then(function(profile) {\n var newState = StateManager.addMembers(viewState, [profile]);\n newState = StateManager.removePendingBlockUsersById(newState, [userId]);\n newState = StateManager.setLoadingConfirmAction(newState, false);\n PubSub.publish(MessageDrawerEvents.CONTACT_BLOCKED, userId);\n return render(newState);\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Tell the statemanager there is a request to unblock a user and run the renderer\n * to show the unblock user dialogue.\n *\n * @param {Number} userId User id of user to unblock.\n */\n var requestUnblockUser = function(userId) {\n cancelRequest(userId);\n var newState = StateManager.addPendingUnblockUsersById(viewState, [userId]);\n render(newState);\n };\n\n /**\n * Send the repository a request to unblock a user, update the statemanager and publish\n * a contact has been unblocked.\n *\n * @param {Number} userId User id of user to unblock.\n * @return {Promise} Renderer promise.\n */\n var unblockUser = function(userId) {\n var newState = StateManager.setLoadingConfirmAction(viewState, true);\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:unblockUser');\n render(newState);\n\n return Repository.unblockUser(viewState.loggedInUserId, userId)\n .then(function(profile) {\n var newState = StateManager.addMembers(viewState, [profile]);\n newState = StateManager.removePendingUnblockUsersById(newState, [userId]);\n newState = StateManager.setLoadingConfirmAction(newState, false);\n PubSub.publish(MessageDrawerEvents.CONTACT_UNBLOCKED, userId);\nreturn render(newState);\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Tell the statemanager there is a request to remove a user from the contact list\n * and run the renderer to show the remove user from contacts dialogue.\n *\n * @param {Number} userId User id of user to remove from contacts.\n */\n var requestRemoveContact = function(userId) {\n cancelRequest(userId);\n var newState = StateManager.addPendingRemoveContactsById(viewState, [userId]);\n render(newState);\n };\n\n /**\n * Send the repository a request to remove a user from the contacts list. update the statemanager\n * and publish a contact has been removed.\n *\n * @param {Number} userId User id of user to remove from contacts.\n * @return {Promise} Renderer promise.\n */\n var removeContact = function(userId) {\n var newState = StateManager.setLoadingConfirmAction(viewState, true);\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:removeContact');\n render(newState);\n\n return Repository.deleteContacts(viewState.loggedInUserId, [userId])\n .then(function(profiles) {\n var newState = StateManager.addMembers(viewState, profiles);\n newState = StateManager.removePendingRemoveContactsById(newState, [userId]);\n newState = StateManager.setLoadingConfirmAction(newState, false);\n PubSub.publish(MessageDrawerEvents.CONTACT_REMOVED, userId);\n return render(newState);\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Tell the statemanager there is a request to add a user to the contact list\n * and run the renderer to show the add user to contacts dialogue.\n *\n* @param {Number} userId User id of user to add to contacts.\n */\n var requestAddContact = function(userId) {\n cancelRequest(userId);\n var newState = StateManager.addPendingAddContactsById(viewState, [userId]);\n render(newState);\n };\n\n /**\n * Send the repository a request to add a user to the contacts list. update the statemanager\n * and publish a contact has been added.\n *\n * @param {Number} userId User id of user to add to contacts.\n * @return {Promise} Renderer promise.\n */\n var addContact = function(userId) {\n var newState = StateManager.setLoadingConfirmAction(viewState, true);\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:addContactRequests');\n render(newState);\n\n return Repository.createContactRequest(viewState.loggedInUserId, userId)\n .then(function(response) {\n if (!response.request) {\n throw new Error(response.warnings[0].message);\n }\n\n return response.request;\n })\n .then(function(request) {\n var newState = StateManager.removePendingAddContactsById(viewState, [userId]);\n newState = StateManager.addContactRequests(newState, [request]);\n newState = StateManager.setLoadingConfirmAction(newState, false);\n return render(newState);\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Set the current conversation as a favourite conversation.\n *\n * @return {Promise} Renderer promise.\n */\n var setFavourite = function() {\n var userId = viewState.loggedInUserId;\n var conversationId = viewState.id;\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:setFavourite');\n\n return Repository.setFavouriteConversations(userId, [conversationId])\n .then(function() {\n var newState = StateManager.setIsFavourite(viewState, true);\n return render(newState);\n })\n .then(function() {\n return PubSub.publish(\n MessageDrawerEvents.CONVERSATION_SET_FAVOURITE,\n formatConversationForEvent(viewState)\n );\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Unset the current conversation as a favourite conversation.\n *\n * @return {Promise} Renderer promise.\n */\n var unsetFavourite = function() {\n var userId = viewState.loggedInUserId;\n var conversationId = viewState.id;\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:unsetFavourite');\n\n return Repository.unsetFavouriteConversations(userId, [conversationId])\n .then(function() {\n var newState = StateManager.setIsFavourite(viewState, false);\n return render(newState);\n })\n .then(function() {\n return PubSub.publish(\n MessageDrawerEvents.CONVERSATION_UNSET_FAVOURITE,\n formatConversationForEvent(viewState)\n );\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Set the current conversation as a muted conversation.\n *\n * @return {Promise} Renderer promise.\n */\n var setMuted = function() {\n var userId = viewState.loggedInUserId;\n var conversationId = viewState.id;\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:markConversationAsRead');\n\n return Repository.setMutedConversations(userId, [conversationId])\n.then(function() {\n var newState = StateManager.setIsMuted(viewState, true);\n return render(newState);\n })\n .then(function() {\n return PubSub.publish(\n MessageDrawerEvents.CONVERSATION_SET_MUTED,\n formatConversationForEvent(viewState)\n );\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Unset the current conversation as a muted conversation.\n *\n * @return {Promise} Renderer promise.\n */\n var unsetMuted = function() {\n var userId = viewState.loggedInUserId;\n var conversationId = viewState.id;\n\n return Repository.unsetMutedConversations(userId, [conversationId])\n .then(function() {\n var newState = StateManager.setIsMuted(viewState, false);\n return render(newState);\n})\n .then(function() {\n return PubSub.publish(\n MessageDrawerEvents.CONVERSATION_UNSET_MUTED,\n formatConversationForEvent(viewState)\n );\n });\n };\n\n /**\n * Tell the statemanager there is a request to delete the selected messages\n * and run the renderer to show confirm delete messages dialogue.\n *\n * @param {Number} userId User id.\n */\n var requestDeleteSelectedMessages = function(userId) {\n var selectedMessageIds = viewState.selectedMessageIds;\n cancelRequest(userId);\n var newState = StateManager.addPendingDeleteMessagesById(viewState, selectedMessageIds);\n render(newState);\n };\n\n /**\n * Send the repository a request to delete the messages pending deletion. Update the statemanager\n * and publish a message deletion event.\n *\n * @return {Promise} Renderer promise.\n */\n var deleteSelectedMessages = function() {\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:deleteSelectedMessages');\n var messageIds = viewState.pendingDeleteMessageIds;\n var sentMessages = viewState.messages.filter(function(message) {\n // If a message sendState is null then it means it was loaded from the server or if it's\n // set to sent then it means the user has successfully sent it in this page load.\n return messageIds.indexOf(message.id) >= 0 && (message.sendState == 'sent' || message.sendState === null);\n });\n var newState = StateManager.setLoadingConfirmAction(viewState, true);\n\n render(newState);\n\n var deleteMessagesPromise = $.Deferred().resolve().promise();\n\n\n if (sentMessages.length) {\n // We only need to send a request to the server if we're trying to delete messages that\n // have successfully been sent.\n var sentMessageIds = sentMessages.map(function(message) {\n return message.id;\n });\n if (newState.deleteMessagesForAllUsers) {\n deleteMessagesPromise = Repository.deleteMessagesForAllUsers(viewState.loggedInUserId, sentMessageIds);\n } else {\n deleteMessagesPromise = Repository.deleteMessages(viewState.loggedInUserId, sentMessageIds);\n }\n }\n\n // Mark that we are deleting content from the conversation to prevent updates of it.\n isDeletingConversationContent = true;\n\n // Stop polling for new messages to the open conversation.\n if (newMessagesPollTimer) {\n newMessagesPollTimer.stop();\n }\n\n return deleteMessagesPromise.then(function() {\n var newState = StateManager.removeMessagesById(viewState, messageIds);\n newState = StateManager.removePendingDeleteMessagesById(newState, messageIds);\n newState = StateManager.removeSelectedMessagesById(newState, messageIds);\n newState = StateManager.setLoadingConfirmAction(newState, false);\n newState = StateManager.setDeleteMessagesForAllUsers(newState, false);\n\n var prevLastMessage = viewState.messages[viewState.messages.length - 1];\n var newLastMessage = newState.messages.length ? newState.messages[newState.messages.length - 1] : null;\n\n if (newLastMessage && newLastMessage.id != prevLastMessage.id) {\n var conversation = formatConversationForEvent(newState);\n PubSub.publish(MessageDrawerEvents.CONVERSATION_NEW_LAST_MESSAGE, conversation);\n } else if (!newState.messages.length) {\n PubSub.publish(MessageDrawerEvents.CONVERSATION_DELETED, newState.id);\n }\n\n isDeletingConversationContent = false;\n return render(newState);\n })\n .then(function(result) {\n pendingPromise.resolve();\n\nreturn result;\n })\n .catch(Notification.exception);\n };\n\n /**\n * Tell the statemanager there is a request to delete a conversation\n * and run the renderer to show confirm delete conversation dialogue.\n *\n * @param {Number} userId User id of other user.\n */\n var requestDeleteConversation = function(userId) {\n cancelRequest(userId);\n var newState = StateManager.setPendingDeleteConversation(viewState, true);\n render(newState);\n };\n\n /**\n * Send the repository a request to delete a conversation. Update the statemanager\n * and publish a conversation deleted event.\n *\n * @return {Promise} Renderer promise.\n */\n var deleteConversation = function() {\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:markConversationAsRead');\n var newState = StateManager.setLoadingConfirmAction(viewState, true);\n render(newState);\n\n // Mark that we are deleting the conversation to prevent updates of it.\n isDeletingConversationContent = true;\n\n // Stop polling for new messages to the open conversation.\n if (newMessagesPollTimer) {\n newMessagesPollTimer.stop();\n }\n\n return Repository.deleteConversation(viewState.loggedInUserId, viewState.id)\n .then(function() {\n var newState = StateManager.removeMessages(viewState, viewState.messages);\n newState = StateManager.removeSelectedMessagesById(newState, viewState.selectedMessageIds);\n newState = StateManager.setPendingDeleteConversation(newState, false);\n newState = StateManager.setLoadingConfirmAction(newState, false);\n PubSub.publish(MessageDrawerEvents.CONVERSATION_DELETED, newState.id);\n\n isDeletingConversationContent = false;\n\n return render(newState);\n })\n .then(function(result) {\npendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Tell the statemanager to cancel all pending actions.\n *\n * @param {Number} userId User id.\n */\n var cancelRequest = function(userId) {\n var pendingDeleteMessageIds = viewState.pendingDeleteMessageIds;\n var newState = StateManager.removePendingAddContactsById(viewState, [userId]);\n newState = StateManager.removePendingRemoveContactsById(newState, [userId]);\n newState = StateManager.removePendingUnblockUsersById(newState, [userId]);\n newState = StateManager.removePendingBlockUsersById(newState, [userId]);\n newState = StateManager.removePendingDeleteMessagesById(newState, pendingDeleteMessageIds);\n newState = StateManager.setPendingDeleteConversation(newState, false);\n newState = StateManager.setDeleteMessagesForAllUsers(newState, false);\n render(newState);\n };\n\n /**\n * Accept the contact request fromthe given user.\n *\n * @param {Number} userId User id of other user.\n * @return {Promise} Renderer promise.\n */\n var acceptContactRequest = function(userId) {\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:acceptContactRequest');\n\n // Search the list of the logged in user's contact requests to find the\n // one from this user.\n var loggedInUserId = viewState.loggedInUserId;\n var requests = viewState.members[userId].contactrequests.filter(function(request) {\n return request.requesteduserid == loggedInUserId;\n });\n var request = requests[0];\n var newState = StateManager.setLoadingConfirmAction(viewState, true);\n render(newState);\n\n return Repository.acceptContactRequest(userId, loggedInUserId)\n .then(function(profile) {\n var newState = StateManager.removeContactRequests(viewState, [request]);\n newState = StateManager.addMembers(viewState, [profile]);\n newState = StateManager.setLoadingConfirmAction(newState, false);\n return render(newState);\n })\n .then(function() {\n PubSub.publish(MessageDrawerEvents.CONTACT_ADDED, viewState.members[userId]);\n PubSub.publish(MessageDrawerEvents.CONTACT_REQUEST_ACCEPTED, request);\n return;\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Decline the contact request from the given user.\n *\n * @param {Number} userId User id of other user.\n * @return {Promise} Renderer promise.\n */\n var declineContactRequest = function(userId) {\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:declineContactRequest');\n\n // Search the list of the logged in user's contact requests to find the\n // one from this user.\n var loggedInUserId = viewState.loggedInUserId;\n var requests = viewState.members[userId].contactrequests.filter(function(request) {\n return request.requesteduserid == loggedInUserId;\n });\n var request = requests[0];\n var newState = StateManager.setLoadingConfirmAction(viewState, true);\n render(newState);\n\n return Repository.declineContactRequest(userId, loggedInUserId)\n .then(function(profile) {\n var newState = StateManager.removeContactRequests(viewState, [request]);\n newState = StateManager.addMembers(viewState, [profile]);\n newState = StateManager.setLoadingConfirmAction(newState, false);\n return render(newState);\n })\n .then(function() {\n PubSub.publish(MessageDrawerEvents.CONTACT_REQUEST_DECLINED, request);\n return;\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n });\n };\n\n /**\n * Send all of the messages in the buffer to the server to be created. Update the\n * UI with the newly created message information.\n *\n * This function will recursively call itself in order to make sure the buffer is\n * always being processed.\n */\n var processSendMessageBuffer = function() {\n if (isSendingMessage) {\n // We're already sending messages so nothing to do.\n return;\n }\n if (!sendMessageBuffer.length) {\n // No messages waiting to send. Nothing to do.\n return;\n }\n\n var pendingPromise = new Pending('core_message/message_drawer_view_conversation:processSendMessageBuffer');\n\n // Flag that we're processing the queue.\n isSendingMessage = true;\n // Grab all of the messages in the buffer.\n var messagesToSend = sendMessageBuffer.slice();\n // Empty the buffersince we're processing it.\n sendMessageBuffer = [];\n var conversationId = viewState.id;\n var newConversationId = null;\n var messagesText = messagesToSend.map(function(message) {\n return message.text;\n });\n var messageIds = messagesToSend.map(function(message) {\n return message.id;\n });\n var sendMessagePromise = null;\n var newCanDeleteMessagesForAllUsers = null;\n if (!conversationId && (viewState.type != CONVERSATION_TYPES.PUBLIC)) {\n // If it's a new private conversation then we need to use the old\n // web service function to create the conversation.\n var otherUserId = getOtherUserId();\n sendMessagePromise = Repository.sendMessagesToUser(otherUserId, messagesText)\n .then(function(messages) {\n if (messages.length) {\n newConversationId = parseInt(messages[0].conversationid, 10);\nnewCanDeleteMessagesForAllUsers = messages[0].candeletemessagesforallusers;\n }\n return messages;\n });\n } else {\n sendMessagePromise = Repository.sendMessagesToConversation(conversationId, messagesText);\n }\n\n sendMessagePromise\n .then(function(messages) {\n var newMessageIds = messages.map(function(message) {\n return message.id;\n });\n var data = [];\n var selectedToRemove = [];\n var selectedToAdd = [];\n\n messagesToSend.forEach(function(oldMessage, index) {\n var newMessage = messages[index];\n // Update messages expects and array of arrays where the first value\n // is the old message to update and the second value is the new values\n // to set.\n data.push([oldMessage, newMessage]);\n\nif (viewState.selectedMessageIds.indexOf(oldMessage.id) >= 0) {\n // If the message was added to the \"selected messages\" list while it was still\n // being sent then we should update it's id in that list now to make sure future\n // actions work.\n selectedToRemove.push(oldMessage.id);\n selectedToAdd.push(newMessage.id);\n }\n });\n var newState = StateManager.updateMessages(viewState, data);\n newState = StateManager.setMessagesSendSuccessById(newState, newMessageIds);\n\n if (selectedToRemove.length) {\n newState = StateManager.removeSelectedMessagesById(newState, selectedToRemove);\n }\n\n if (selectedToAdd.length) {\n newState = StateManager.addSelectedMessagesById(newState, selectedToAdd);\n }\n\n var conversation = formatConversationForEvent(newState);\n\n if (!newState.id) {\n // If this message created the conversation then save the conversation\n // id.\n newState = StateManager.setId(newState, newConversationId);\n conversation.id = newConversationId;\n resetMessagePollTimer(newConversationId);\n PubSub.publish(MessageDrawerEvents.CONVERSATION_CREATED, conversation);\n newState = StateManager.setCanDeleteMessagesForAllUsers(newState, newCanDeleteMessagesForAllUsers);\n }\n\n // Update the UI with the new message values from the server.\n render(newState);\n // Recurse just in case there has been more messages added to the buffer.\n isSendingMessage = false;\n processSendMessageBuffer();\n PubSub.publish(MessageDrawerEvents.CONVERSATION_NEW_LAST_MESSAGE, conversation);\n return;\n })\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n })\n .catch(function(e) {\n var errorMessage;\n if (e.message) {\n errorMessage = $.Deferred().resolve(e.message).promise();\n } else {\n errorMessage = Str.get_string('unknownerror', 'core');\n }\n\n var handleFailedMessages = function(errorMessage) {\n // We failed to create messages so remove the old messages from the pending queue\n // and update the UI to indicate that the message failed.\n var newState = StateManager.setMessagesSendFailById(viewState, messageIds, errorMessage);\n render(newState);\n isSendingMessage = false;\n processSendMessageBuffer();\n };\n\nerrorMessage.then(handleFailedMessages)\n .then(function(result) {\n pendingPromise.resolve();\n\n return result;\n })\n .catch(function(e) {\n // Hrmm, we can't even load the error messages string! We'll have to\n // hard code something in English here if we still haven't got a message\n // to show.\n var finalError = e.message || 'Something went wrong!';\n handleFailedMessages(finalError);\n });\n });\n };\n\n /**\n * Create a plain version of an HTML text.\n *\n * This texts is used as a message preview while is sent to the server. This way\n * it is possible to prevent self-xss.\n *\n * @param {String} text Text to send.\n * @return {String} The plain text version of the text.\n */\n const previewText = function(text) {\n // Remove all script and styles from text (we don't want it there).\n let plaintext = text.replace(/<style([\\s\\S]*?)<\\/style>/gi, '');\n plaintext = plaintext.replace(/<script([\\s\\S]*?)<\\/script>/gi, '');\n // Beautify a bit the output adding some line breaks.\n plaintext = plaintext.replace(/<\\/div>/ig, '\\n');\n plaintext = plaintext.replace(/<\\/li>/ig, '\\n');\n plaintext = plaintext.replace(/<li>/ig, ' * ');\n plaintext = plaintext.replace(/<\\/ul>/ig, '\\n');\n plaintext = plaintext.replace(/<\\/p>/ig, '\\n');\n plaintext = plaintext.replace(/<br[^>]*>/gi, '\\n');\n // Remove all remaining tags and convert line breaks into html.\n plaintext = plaintext.replace(/<[^>]+>/ig, '');\n plaintext = plaintext.replace(/\\n+/ig, '\\n');\n return plaintext.replace(/\\n/ig, '<br>');\n };\n\n /**\n * Buffers messages to be sent to the server. We use a buffer here to allow the\n * user to freely input messages without blocking the interface for them.\n *\n * Instead we just queue all of their messages up and send them as fast as we can.\n *\n * @param {String} text Text to send.\n */\n var sendMessage = function(text) {\n var id = 'temp' + Date.now();\n // Render a preview version of the message while sending.\n let loadingmessage = {\n id: id,\n useridfrom: viewState.loggedInUserId,\n text: previewText(text),\n timecreated: null\n };\n var newState = StateManager.addMessages(viewState, [loadingmessage]);\n render(newState);\n // Send the real message.\n var message = {\n id: id,\n useridfrom: viewState.loggedInUserId,\n text: text,\n timecreated: null\n };\n sendMessageBuffer.push(message);\n processSendMessageBuffer();\n\n // Remove the unsent message attribute so we can be notified of new unsent messages (see storeUnsentMessage).\n const textArea = document.querySelector(SELECTORS.MESSAGE_TEXT_AREA);\n if (textArea) {\n textArea.removeAttribute('data-unsent-message-viewed');\n }\n };\n\n /**\n * Retry sending a message that failed.\n *\n * @param {Object} message The message to send.\n */\n var retrySendMessage = function(message) {\n var newState = StateManager.setMessagesSendPendingById(viewState, [message.id]);\n render(newState);\n sendMessageBuffer.push(message);\n processSendMessageBuffer();\n };\n\n /**\n * Toggle the selected messages update the statemanager and render the result.\n *\n * @param {Number} messageId The id of the message to be toggled\n */\n var toggleSelectMessage = function(messageId) {\n var newState = viewState;\n\n if (viewState.selectedMessageIds.indexOf(messageId) > -1) {\n newState = StateManager.removeSelectedMessagesById(viewState, [messageId]);\n } else {\n newState = StateManager.addSelectedMessagesById(viewState, [messageId]);\n }\n\n render(newState);\n };\n\n /**\n * Cancel edit mode (selecting the messages).\n */\n var cancelEditMode = function() {\n cancelRequest(getOtherUserId());\n var newState = StateManager.removeSelectedMessagesById(viewState, viewState.selectedMessageIds);\n render(newState);\n };\n\n /**\n * Process the patches in the render buffer one at a time in order until the\n * buffer is empty.\n *\n * @param {Object} header The conversation header container element.\n * @param {Object} body The conversation body container element.\n * @param {Object} footer The conversation footer container element.\n */\n var processRenderBuffer = function(header, body, footer) {\n if (isRendering) {\n return;\n }\n\n if (!renderBuffer.length) {\n return;\n }\n\n isRendering = true;\n var renderable = renderBuffer.shift();\n var renderPromises = renderers.map(function(renderFunc) {\n return renderFunc(renderable.patch);\n });\n\n $.when.apply(null, renderPromises)\n .then(function() {\n isRendering = false;\n renderable.deferred.resolve(true);\n // Keep processing the buffer until it's empty.\n processRenderBuffer(header, body, footer);\n\n return;\n })\n .catch(function(error) {\n isRendering = false;\n renderable.deferred.reject(error);\n Notification.exception(error);\n });\n };\n\n /**\n * Create a function to render the Conversation.\n *\n * @param {Object} header The conversation header container element.\n * @param {Object} body The conversation body container element.\n * @param {Object} footer The conversation footer container element.\n* @param {Bool} isNewConversation Has someone else already initialised a conversation?\n * @return {Promise} Renderer promise.\n */\n var generateRenderFunction = function(header, body, footer, isNewConversation) {\n var rendererFunc = function(patch) {\n return Renderer.render(header, body, footer, patch);\n };\n\n if (!isNewConversation) {\n // Looks like someone got here before us! We'd better update our\n // UI to make sure it matches.\n var initialState = StateManager.buildInitialState(viewState.midnight, viewState.loggedInUserId, viewState.id);\n var syncPatch = Patcher.buildPatch(initialState, viewState);\n rendererFunc(syncPatch);\n }\n\n renderers.push(rendererFunc);\n\n return function(newState) {\n var patch = Patcher.buildPatch(viewState, newState);\n var deferred = $.Deferred();\n\n // Check if the patch has any data. Ignore empty patches.\nif (Object.keys(patch).length) {\n // Add the patch to the render buffer which gets processed in order.\n renderBuffer.push({\n patch: patch,\n deferred: deferred\n });\n } else {\n deferred.resolve(true);\n }\n // This is a great place to add in some console logging if you need\n // to debug something. You can log the current state, the next state,\n // and the generated patch and see exactly what will be updated.\n\n // Optimistically update the state. We're going to assume that the rendering\n // will always succeed. The rendering is asynchronous (annoyingly) so it's buffered\n // but it'll reach eventual consistency with the current state.\n viewState = newState;\n if (newState.id) {\n // Only cache created conversations.\n stateCache[newState.id] = {\nstate: newState,\n messagesOffset: getMessagesOffset(),\n loadedAllMessages: hasLoadedAllMessages()\n };\n }\n\n // Start processing the buffer.\n processRenderBuffer(header, body, footer);\n\n return deferred.promise();\n };\n };\n\n /**\n * Create a confirm action function.\n *\n * @param {Function} actionCallback The callback function.\n * @return {Function} Confirm action handler.\n */\n var generateConfirmActionHandler = function(actionCallback) {\n return function(e, data) {\n if (!viewState.loadingConfirmAction) {\n actionCallback(getOtherUserId());\n var newState = StateManager.setLoadingConfirmAction(viewState, false);\n render(newState);\n }\n data.originalEvent.preventDefault();\n };\n };\n\n /**\n * Send message event handler.\n *\n * @param {Object} e Element this event handler is called on.\n * @param {Object} data Data for this event.\n */\n var handleSendMessage = function(e, data) {\n var target = $(e.target);\n var footerContainer = target.closest(SELECTORS.FOOTER_CONTAINER);\n var textArea = footerContainer.find(SELECTORS.MESSAGE_TEXT_AREA);\n var text = textArea.val().trim();\n\n if (text !== '') {\n sendMessage(text);\n textArea.val('');\n textArea.focus();\n }\n\n data.originalEvent.preventDefault();\n };\n\n /**\n * Select message event handler.\n *\n * @param {Object} e Element this event handler is called on.\n * @param {Object} data Data for this event.\n */\n var handleSelectMessage = function(e, data) {\n var selection = window.getSelection();\n var target = $(e.target);\n\n if (selection.toString() != '') {\n // Bail if we're selecting.\n return;\n }\n\n if (target.is('a')) {\n // Clicking on a link in the message so ignore it.\n return;\n }\n\n var element = target.closest(SELECTORS.MESSAGE);\n var messageId = element.attr('data-message-id');\n\n toggleSelectMessage(messageId);\n\n data.originalEvent.preventDefault();\n };\n\n /**\n * Handle retry sending of message.\n *\n * @param {Object} e Element this event handler is called on.\n * @param {Object} data Data for this event.\n */\n var handleRetrySendMessage = function(e, data) {\n var target = $(e.target);\n var element = target.closest(SELECTORS.MESSAGE);\n var messageId = element.attr('data-message-id');\n var messages = viewState.messages.filter(function(message) {\n return message.id == messageId;\n });\n var message = messages.length ? messages[0] : null;\n\n if (message) {\n retrySendMessage(message);\n }\n\n data.originalEvent.preventDefault();\n data.originalEvent.stopPropagation();\n e.stopPropagation();\n };\n\n /**\n * Cancel edit mode event handler.\n *\n * @param {Object} e Element this event handler is called on.\n * @param {Object} data Data for this event.\n */\n var handleCancelEditMode = function(e, data) {\n cancelEditMode();\n data.originalEvent.preventDefault();\n };\n\n /**\n * Show the view contact page.\n *\n * @param {String} namespace Unique identifier for the Routes\n * @return {Function} View contact handler.\n */\n var generateHandleViewContact = function(namespace) {\n return function(e, data) {\n var otherUserId = getOtherUserId();\n var otherUser = viewState.members[otherUserId];\n MessageDrawerRouter.go(namespace, MessageDrawerRoutes.VIEW_CONTACT, otherUser);\n data.originalEvent.preventDefault();\n };\n };\n\n /**\n * Set this conversation as a favourite.\n *\n * @param {Object} e Element this event handler is called on.\n * @param {Object} data Data for this event.\n */\n var handleSetFavourite = function(e, data) {\n setFavourite().catch(Notification.exception);\n data.originalEvent.preventDefault();\n };\n\n /**\n * Unset this conversation as a favourite.\n *\n * @param {Object} e Element this event handler is called on.\n * @param {Object} data Data for this event.\n */\n var handleUnsetFavourite = function(e, data) {\n unsetFavourite().catch(Notification.exception);\n data.originalEvent.preventDefault();\n };\n\n /**\n * Show the view group info page.\n * Set this conversation as muted.\n *\n * @param {Object} e Element this event handler is called on.\n * @param {Object} data Data for this event.\n */\n var handleSetMuted = function(e, data) {\n setMuted().catch(Notification.exception);\n data.originalEvent.preventDefault();\n };\n\n /**\n * Unset this conversation as muted.\n *\n * @param {Object} e Element this event handler is called on.\n * @param {Object} data Data for this event.\n */\n var handleUnsetMuted = function(e, data) {\n unsetMuted().catch(Notification.exception);\n data.originalEvent.preventDefault();\n };\n\n /**\n * Handle clicking on the checkbox that toggles deleting messages for\n * all users.\n *\n * @param {Object} e Element this event handler is called on.\n */\n var handleDeleteMessagesForAllUsersToggle = function(e) {\n var newValue = $(e.target).prop('checked');\n var newState = StateManager.setDeleteMessagesForAllUsers(viewState, newValue);\n render(newState);\n };\n\n /**\n * Show the view contact page.\n *\n * @param {String} namespace Unique identifier for the Routes\n * @return {Function} View group info handler.\n */\n var generateHandleViewGroupInfo = function(namespace) {\nreturn function(e, data) {\n MessageDrawerRouter.go(\n namespace,\n MessageDrawerRoutes.VIEW_GROUP_INFO,\n {\n id: viewState.id,\n name: viewState.name,\n subname: viewState.subname,\n imageUrl: viewState.imageUrl,\n totalMemberCount: viewState.totalMemberCount\n },\n viewState.loggedInUserId\n );\n data.originalEvent.preventDefault();\n };\n };\n\n /**\n * Handle clicking on the emoji toggle button.\n *\n * @param {Object} e The event\n * @param {Object} data The custom interaction event data\n */\n var handleToggleEmojiPicker = function(e, data) {\n var newState = StateManager.setShowEmojiPicker(viewState, !viewState.showEmojiPicker);\n render(newState);\n data.originalEvent.preventDefault();\n };\n\n /**\n * Handle clicking outside the emoji picker to close it.\n *\n * @param {Object} e The event\n */\n var handleCloseEmojiPicker = function(e) {\n var target = $(e.target);\n\n if (\n viewState.showEmojiPicker &&\n !target.closest(SELECTORS.EMOJI_PICKER_CONTAINER).length &&\n !target.closest(SELECTORS.TOGGLE_EMOJI_PICKER_BUTTON).length\n ) {\n var newState = StateManager.setShowEmojiPicker(viewState, false);\n render(newState);\n }\n };\n\n /**\n * Listen to, and handle events for conversations.\n *\n * @param {string} namespace The route namespace.\n * @param {Object} header Conversation header container element.\n * @param {Object} body Conversation body container element.\n * @param {Object} footer Conversation footer container element.\n */\n var registerEventListeners = function(namespace, header, body, footer) {\n var isLoadingMoreMessages = false;\n var messagesContainer = getMessagesContainer(body);\n var emojiPickerElement = footer.find(SELECTORS.EMOJI_PICKER);\n var emojiAutoCompleteContainer = footer.find(SELECTORS.EMOJI_AUTO_COMPLETE_CONTAINER);\n var messageTextArea = footer.find(SELECTORS.MESSAGE_TEXT_AREA);\n var headerActivateHandlers = [\n [SELECTORS.ACTION_REQUEST_BLOCK, generateConfirmActionHandler(requestBlockUser)],\n [SELECTORS.ACTION_REQUEST_UNBLOCK, generateConfirmActionHandler(requestUnblockUser)],\n [SELECTORS.ACTION_REQUEST_ADD_CONTACT, generateConfirmActionHandler(requestAddContact)],\n [SELECTORS.ACTION_REQUEST_REMOVE_CONTACT, generateConfirmActionHandler(requestRemoveContact)],\n [SELECTORS.ACTION_REQUEST_DELETE_CONVERSATION, generateConfirmActionHandler(requestDeleteConversation)],\n [SELECTORS.ACTION_CANCEL_EDIT_MODE, handleCancelEditMode],\n [SELECTORS.ACTION_VIEW_CONTACT, generateHandleViewContact(namespace)],\n [SELECTORS.ACTION_VIEW_GROUP_INFO, generateHandleViewGroupInfo(namespace)],\n [SELECTORS.ACTION_CONFIRM_FAVOURITE, handleSetFavourite],\n [SELECTORS.ACTION_CONFIRM_MUTE, handleSetMuted],\n [SELECTORS.ACTION_CONFIRM_UNFAVOURITE, handleUnsetFavourite],\n [SELECTORS.ACTION_CONFIRM_UNMUTE, handleUnsetMuted]\n ];\n var bodyActivateHandlers = [\n [SELECTORS.ACTION_CANCEL_CONFIRM, generateConfirmActionHandler(cancelRequest)],\n [SELECTORS.ACTION_CONFIRM_BLOCK, generateConfirmActionHandler(blockUser)],\n [SELECTORS.ACTION_CONFIRM_UNBLOCK, generateConfirmActionHandler(unblockUser)],\n [SELECTORS.ACTION_CONFIRM_ADD_CONTACT, generateConfirmActionHandler(addContact)],\n [SELECTORS.ACTION_CONFIRM_REMOVE_CONTACT, generateConfirmActionHandler(removeContact)],\n [SELECTORS.ACTION_CONFIRM_DELETE_SELECTED_MESSAGES, generateConfirmActionHandler(deleteSelectedMessages)],\n [SELECTORS.ACTION_CONFIRM_DELETE_CONVERSATION, generateConfirmActionHandler(deleteConversation)],\n [SELECTORS.ACTION_OKAY_CONFIRM, generateConfirmActionHandler(cancelRequest)],\n [SELECTORS.ACTION_REQUEST_ADD_CONTACT, generateConfirmActionHandler(requestAddContact)],\n [SELECTORS.ACTION_ACCEPT_CONTACT_REQUEST, generateConfirmActionHandler(acceptContactRequest)],\n [SELECTORS.ACTION_DECLINE_CONTACT_REQUEST, generateConfirmActionHandler(declineContactRequest)],\n [SELECTORS.MESSAGE, handleSelectMessage],\n [SELECTORS.DELETE_MESSAGES_FOR_ALL_USERS_TOGGLE, handleDeleteMessagesForAllUsersToggle],\n [SELECTORS.RETRY_SEND, handleRetrySendMessage]\n ];\n var footerActivateHandlers = [\n [SELECTORS.SEND_MESSAGE_BUTTON, handleSendMessage],\n [SELECTORS.TOGGLE_EMOJI_PICKER_BUTTON, handleToggleEmojiPicker],\n [SELECTORS.ACTION_REQUEST_DELETE_SELECTED_MESSAGES, generateConfirmActionHandler(requestDeleteSelectedMessages)],\n [SELECTORS.ACTION_REQUEST_ADD_CONTACT, generateConfirmActionHandler(requestAddContact)],\n [SELECTORS.ACTION_REQUEST_UNBLOCK, generateConfirmActionHandler(requestUnblockUser)],\n ];\n\n AutoRows.init(footer);\n\n if (emojiAutoCompleteContainer.length) {\n initialiseEmojiAutoComplete(\n emojiAutoCompleteContainer[0],\n messageTextArea[0],\n function(hasSuggestions) {\n var newState = StateManager.setShowEmojiAutoComplete(viewState, hasSuggestions);\n render(newState);\n },\n function(emoji) {\n var newState = StateManager.setShowEmojiAutoComplete(viewState, false);\n render(newState);\n\n messageTextArea.focus();\n var cursorPos = messageTextArea.prop('selectionStart');\n var currentText = messageTextArea.val();\n var textBefore = currentText.substring(0, cursorPos).replace(/\\S*$/, '');\n var textAfter = currentText.substring(cursorPos).replace(/^\\S*/, '');\n\n messageTextArea.val(textBefore + emoji + textAfter);\n // Set the cursor position to after the inserted emoji.\n messageTextArea.prop('selectionStart', textBefore.length + emoji.length);\n messageTextArea.prop('selectionEnd', textBefore.length + emoji.length);\n }\n );\n }\n\n if (emojiPickerElement.length) {\n initialiseEmojiPicker(emojiPickerElement[0], function(emoji) {\n var newState = StateManager.setShowEmojiPicker(viewState, !viewState.showEmojiPicker);\n render(newState);\n\n messageTextArea.focus();\n var cursorPos = messageTextArea.prop('selectionStart');\n var currentText = messageTextArea.val();\n var textBefore = currentText.substring(0, cursorPos);\n var textAfter = currentText.substring(cursorPos, currentText.length);\n\n messageTextArea.val(textBefore + emoji + textAfter);\n // Set the cursor position to after the inserted emoji.\n messageTextArea.prop('selectionStart', cursorPos + emoji.length);\n messageTextArea.prop('selectionEnd', cursorPos + emoji.length);\n });\n }\n\n CustomEvents.define(header, [\n CustomEvents.events.activate\n ]);\n CustomEvents.define(body, [\n CustomEvents.events.activate\n ]);\n CustomEvents.define(footer, [\n CustomEvents.events.activate,\n CustomEvents.events.enter,\n CustomEvents.events.escape\n ]);\n CustomEvents.define(messagesContainer, [\n CustomEvents.events.scrollTop,\n CustomEvents.events.scrollLock\n ]);\n\n messagesContainer.on(CustomEvents.events.scrollTop, function(e, data) {\n var hasMembers = Object.keys(viewState.members).length > 1;\n\n if (!isResetting && !isLoadingMoreMessages && !hasLoadedAllMessages() && hasMembers) {\n isLoadingMoreMessages = true;\n var newState = StateManager.setLoadingMessages(viewState, true);\n render(newState);\n\n loadMessages(viewState.id, LOAD_MESSAGE_LIMIT, getMessagesOffset(), NEWEST_FIRST, [])\n .then(function() {\n isLoadingMoreMessages = false;\n setMessagesOffset(getMessagesOffset() + LOAD_MESSAGE_LIMIT);\n return;\n })\n .catch(function(error) {\n isLoadingMoreMessages = false;\n Notification.exception(error);\n });\n }\n\n data.originalEvent.preventDefault();\n });\n\n headerActivateHandlers.forEach(function(handler) {\n var selector = handler[0];\n var handlerFunction = handler[1];\n header.on(CustomEvents.events.activate, selector, handlerFunction);\n });\n\n bodyActivateHandlers.forEach(function(handler) {\n var selector = handler[0];\n var handlerFunction = handler[1];\n body.on(CustomEvents.events.activate, selector, handlerFunction);\n });\n\n footerActivateHandlers.forEach(function(handler) {\n var selector = handler[0];\n var handlerFunction = handler[1];\n footer.on(CustomEvents.events.activate, selector, handlerFunction);\n });\n\n footer.on(CustomEvents.events.enter, SELECTORS.MESSAGE_TEXT_AREA, function(e, data) {\n var enterToSend = footer.attr('data-enter-to-send');\n if (enterToSend && enterToSend != 'false' && enterToSend != '0') {\n handleSendMessage(e, data);\n }\n });\n\n footer.on(CustomEvents.events.escape, SELECTORS.EMOJI_PICKER_CONTAINER, handleToggleEmojiPicker);\n $(document.body).on('click', handleCloseEmojiPicker);\n\n PubSub.subscribe(MessageDrawerEvents.ROUTE_CHANGED, function(newRouteData) {\n if (newMessagesPollTimer) {\n if (newRouteData.route != MessageDrawerRoutes.VIEW_CONVERSATION) {\n newMessagesPollTimer.stop();\n }\n }\n });\n };\n\n /**\n * Reset the timer that polls for new messages.\n *\n * @param {Number} conversationId The conversation id\n */\n var resetMessagePollTimer = function(conversationId) {\n if (newMessagesPollTimer) {\n newMessagesPollTimer.stop();\n }\n\n newMessagesPollTimer = new BackOffTimer(\n getLoadNewMessagesCallback(conversationId, NEWEST_FIRST),\n BackOffTimer.getIncrementalCallback(\n viewState.messagePollMin * MILLISECONDS_IN_SEC,\n MILLISECONDS_IN_SEC,\n viewState.messagePollMax * MILLISECONDS_IN_SEC,\n viewState.messagePollAfterMax * MILLISECONDS_IN_SEC\n )\n );\n\n newMessagesPollTimer.start();\n };\n\n /**\n * Reset the state to the initial state and render the UI.\n *\n * @param {Object} body Conversation body container element.\n * @param {Number|null} conversationId The conversation id.\n * @param {Object} loggedInUserProfile The logged in user's profile.\n */\n var resetState = function(body, conversationId, loggedInUserProfile) {\n // Reset all of the states back to the beginning if we're loading a new\n // conversation.\n if (newMessagesPollTimer) {\n newMessagesPollTimer.stop();\n }\n loadedAllMessages = false;\n messagesOffset = 0;\n newMessagesPollTimer = null;\n isRendering = false;\n renderBuffer = [];\n isResetting = true;\n isSendingMessage = false;\n isDeletingConversationContent = false;\n sendMessageBuffer = [];\n\n var loggedInUserId = loggedInUserProfile.id;\n var midnight = parseInt(body.attr('data-midnight'), 10);\n var messagePollMin = parseInt(body.attr('data-message-poll-min'), 10);\n var messagePollMax = parseInt(body.attr('data-message-poll-max'), 10);\n var messagePollAfterMax = parseInt(body.attr('data-message-poll-after-max'), 10);\n var initialState = StateManager.buildInitialState(\n midnight,\n loggedInUserId,\n conversationId,\n messagePollMin,\n messagePollMax,\n messagePollAfterMax\n );\n\n if (!viewState) {\n viewState = initialState;\n }\n\n render(initialState);\n };\n\n /**\n * Load a new empty private conversation between two users or self-conversation.\n *\n * @param {Object} body Conversation body container element.\n * @param {Object} loggedInUserProfile The logged in user's profile.\n * @param {Int} otherUserId The other user's id.\n * @return {Promise} Renderer promise.\n */\n var resetNoConversation = function(body, loggedInUserProfile, otherUserId) {\n // Always reset the state back to the initial state so that the\n // state manager and patcher can work correctly.\n resetState(body, null, loggedInUserProfile);\n\n var resetNoConversationPromise = null;\n\n if (loggedInUserProfile.id != otherUserId) {\n // Private conversation between two different users.\n resetNoConversationPromise = Repository.getConversationBetweenUsers(\n loggedInUserProfile.id,\n otherUserId,\n true,\n true,\n 0,\n 0,\n LOAD_MESSAGE_LIMIT,\n 0,\n NEWEST_FIRST\n );\n } else {\n // Self conversation.\n resetNoConversationPromise = Repository.getSelfConversation(\n loggedInUserProfile.id,\n LOAD_MESSAGE_LIMIT,\n 0,\n NEWEST_FIRST\n );\n }\n\n return resetNoConversationPromise.then(function(conversation) {\n // Looks like we have a conversation after all! Let's use that.\n return resetByConversation(body, conversation, loggedInUserProfile);\n })\n .catch(function() {\n // Can't find a conversation. Oh well. Just load up a blank one.\n return loadEmptyPrivateConversation(loggedInUserProfile, otherUserId);\n });\n };\n\n /**\n * Load new messages into the conversation based on a time interval.\n *\n * @param {Object} body Conversation body container element.\n * @param {Number} conversationId The conversation id.\n * @param {Object} loggedInUserProfile The logged in user's profile.\n * @return {Promise} Renderer promise.\n */\n var resetById = function(body, conversationId, loggedInUserProfile) {\n var cache = null;\n if (conversationId in stateCache) {\n cache = stateCache[conversationId];\n }\n\n // Always reset the state back to the initial state so that the\n // state manager and patcher can work correctly.\n resetState(body, conversationId, loggedInUserProfile);\n\n var promise = $.Deferred().resolve({}).promise();\n if (cache) {\n // We've seen this conversation before so there is no need to\n // send any network requests.\n var newState = cache.state;\n // Reset some loading states just in case they were left weirdly.\n newState = StateManager.setLoadingMessages(newState, false);\n newState = StateManager.setLoadingMembers(newState, false);\n setMessagesOffset(cache.messagesOffset);\n setLoadedAllMessages(cache.loadedAllMessages);\n render(newState);\n } else {\n promise = loadNewConversation(\nconversationId,\n loggedInUserProfile,\n LOAD_MESSAGE_LIMIT,\n 0,\n NEWEST_FIRST\n );\n }\n\n return promise.then(function() {\n return resetMessagePollTimer(conversationId);\n });\n };\n\n /**\n * Load new messages into the conversation based on a time interval.\n *\n * @param {Object} body Conversation body container element.\n * @param {Object} conversation The conversation.\n * @param {Object} loggedInUserProfile The logged in user's profile.\n * @return {Promise} Renderer promise.\n */\n var resetByConversation = function(body, conversation, loggedInUserProfile) {\n var cache = null;\n if (conversation.id in stateCache) {\n cache = stateCache[conversation.id];\n }\n\n // Always reset the state back to the initial state so that the\n // state manager and patcher can work correctly.\n resetState(body, conversation.id, loggedInUserProfile);\n\n var promise = $.Deferred().resolve({}).promise();\n if (cache) {\n // We've seen this conversation before so there is no need to\n // send any network requests.\n var newState = cache.state;\n // Reset some loading states just in case they were left weirdly.\n newState = StateManager.setLoadingMessages(newState, false);\n newState = StateManager.setLoadingMembers(newState, false);\n setMessagesOffset(cache.messagesOffset);\n setLoadedAllMessages(cache.loadedAllMessages);\n render(newState);\n } else {\n promise = loadExistingConversation(\n conversation,\n loggedInUserProfile,\n LOAD_MESSAGE_LIMIT,\n NEWEST_FIRST\n );\n }\n\n return promise.then(function() {\n return resetMessagePollTimer(conversation.id);\n });\n };\n\n /**\n* Setup the conversation page. This is a rather complex function because there are a\n * few combinations of arguments that can be provided to this function to show the\n * conversation.\n *\n * There are:\n * 1.) A conversation object with no action or other user id (e.g. from the overview page)\n * 2.) A conversation id with no action or other user id (e.g. from the contacts page)\n * 3.) No conversation/id with an action and other other user id. (e.g. from contact page)\n *\n * @param {string} namespace The route namespace.\n * @param {Object} header Conversation header container element.\n * @param {Object} body Conversation body container element.\n * @param {Object} footer Conversation footer container element.\n * @param {Object|Number|null} conversationOrId Conversation or id or null\n * @param {String} action An action to take on the conversation\n * @param {Number} otherUserId The other user id for a private conversation\n * @return {Object} jQuery promise\n */\n var show = function(namespace, header, body, footer, conversationOrId, action, otherUserId) {\n var conversation = null;\n var conversationId = null;\n\n // Check what we were given to identify the conversation.\n if (conversationOrId && conversationOrId !== null && typeof conversationOrId == 'object') {\n conversation = conversationOrId;\n conversationId = parseInt(conversation.id, 10);\n } else {\n conversation = null;\n conversationId = parseInt(conversationOrId, 10);\n conversationId = isNaN(conversationId) ? null : conversationId;\n }\n\n if (!conversationId && action && otherUserId) {\n // If we didn't get a conversation id got a user id then let's see if we've\n // previously loaded a private conversation with this user.\n conversationId = getCachedPrivateConversationIdFromUserId(otherUserId);\n }\n\n // Set attributes to aid in the restoration of unsent messages.\n setConversationAttributes(footer, conversationId, otherUserId);\n\n // This is a new conversation if:\n // 1. We don't already have a state\n // 2. The given conversation doesn't match the one currently loaded\n // 3. We have a view state without a conversation id and we weren't given one\n // but we were given a different other user id. This happens when the user\n // goes from viewing a user that they haven't yet initialised a conversation\n // with to viewing a different user that they also haven't initialised a\n // conversation with.\n var isNewConversation = !viewState || (viewState.id != conversationId) || (otherUserId && otherUserId != getOtherUserId());\n\n if (!body.attr('data-init')) {\n // Generate the render function to bind the header, body, and footer\n // elements to it so that we don't need to pass them around this module.\nrender = generateRenderFunction(header, body, footer, isNewConversation);\n registerEventListeners(namespace, header, body, footer);\n body.attr('data-init', true);\n }\n\n if (isNewConversation) {\n var renderPromise = null;\n var loggedInUserProfile = getLoggedInUserProfile(body);\n\n if (conversation) {\n renderPromise = resetByConversation(body, conversation, loggedInUserProfile, otherUserId);\n } else if (conversationId) {\n renderPromise = resetById(body, conversationId, loggedInUserProfile, otherUserId);\n } else {\n renderPromise = resetNoConversation(body, loggedInUserProfile, otherUserId);\n }\n\n return renderPromise\n .then(function() {\n isResetting = false;\n // Focus the first element that can receieve it in the header.\n header.find(Constants.SELECTORS.CAN_RECEIVE_FOCUS).first().focus();\n return;\n })\n .catch(function(error) {\n isResetting = false;\n Notification.exception(error);\n });\n }\n\n // We're not loading a new conversation so we should reset the poll timer to try to load\n // new messages.\n resetMessagePollTimer(conversationId);\n\n if (viewState.type == CONVERSATION_TYPES.PRIVATE && action) {\n // There are special actions that the user can perform in a private (aka 1-to-1)\n // conversation.\n var currentOtherUserId = getOtherUserId();\n\n switch (action) {\n case 'block':\n return requestBlockUser(currentOtherUserId);\n case 'unblock':\n return requestUnblockUser(currentOtherUserId);\n case 'add-contact':\n return requestAddContact(currentOtherUserId);\ncase 'remove-contact':\n return requestRemoveContact(currentOtherUserId);\n }\n }\n\n // Final fallback to return a promise if we didn't need to do anything.\n return $.Deferred().resolve().promise();\n };\n\n /**\n * String describing this page used for aria-labels.\n *\n * @return {Object} jQuery promise\n */\n var description = function() {\n return Str.get_string('messagedrawerviewconversation', 'core_message', viewState.name);\n };\n\n /**\n * Set some attributes that will help reboot a conversation.\n *\n * These attributes aid in the storage and retrieval of unsent messages.\n * When a conversationid is not present, otheruserid can be used to create a conversation.\n *\n * @param {Object} element The element to target.\n * @param {Number|null} conversationId The conversationid.\n * @param {Number|null} otherUserId The otheruserid.\n */\n const setConversationAttributes = function(element, conversationId, otherUserId) {\n 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