session-desktop/ts/state/ducks/conversations.ts

import _, { omit } from 'lodash';

import { Constants } from '../../session';
import { createAsyncThunk, createSlice, PayloadAction } from '@reduxjs/toolkit';
import { getConversationController } from '../../session/conversations';
import { getMessagesByConversation } from '../../data/data';
import {
  ConversationNotificationSettingType,
  ConversationTypeEnum,
} from '../../models/conversation';
import {
  MessageDeliveryStatus,
  MessageModelType,
  MessageRegularProps,
  PropsForDataExtractionNotification,
} from '../../models/messageType';
import { NotificationForConvoOption } from '../../components/conversation/ConversationHeader';
import { LightBoxOptions } from '../../components/session/conversation/SessionConversation';
import { ReplyingToMessageProps } from '../../components/session/conversation/SessionCompositionBox';

export type MessageModelProps = {
  propsForMessage: PropsForMessage;
  propsForSearchResult: PropsForSearchResults | null;
  propsForGroupInvitation: PropsForGroupInvitation | null;
  propsForTimerNotification: PropsForExpirationTimer | null;
  propsForDataExtractionNotification: PropsForDataExtractionNotification | null;
  propsForGroupNotification: PropsForGroupUpdate | null;
};

export type ContactPropsMessageDetail = {
  status: string | null;
  phoneNumber: string;
  name?: string | null;
  profileName?: string | null;
  avatarPath?: string | null;
  isOutgoingKeyError: boolean;

  errors?: Array<Error>;
};

export type MessagePropsDetails = {
  sentAt: number;
  receivedAt: number;

  message: MessageRegularProps;
  errors: Array<Error>;
  contacts: Array<ContactPropsMessageDetail>;
};

export type LastMessageStatusType = MessageDeliveryStatus | null;

export type FindAndFormatContactType = {
  phoneNumber: string;
  avatarPath: string | null;
  name: string | null;
  profileName: string | null;
  title: string | null;
  isMe: boolean;
};

export type PropsForExpirationTimer = {
  timespan: string;
  disabled: boolean;
  phoneNumber: string;
  avatarPath: string | null;
  name: string | null;
  profileName: string | null;
  title: string | null;
  type: 'fromMe' | 'fromSync' | 'fromOther';
};

export type PropsForGroupUpdateGeneral = {
  type: 'general';
};

export type PropsForGroupUpdateAdd = {
  type: 'add';
  contacts?: Array<FindAndFormatContactType>;
};

export type PropsForGroupUpdateKicked = {
  type: 'kicked';
  isMe: boolean;
  contacts?: Array<FindAndFormatContactType>;
};

export type PropsForGroupUpdateRemove = {
  type: 'remove';
  isMe: boolean;
  contacts?: Array<FindAndFormatContactType>;
};

export type PropsForGroupUpdateName = {
  type: 'name';
  newName: string;
};

export type PropsForGroupUpdateType =
  | PropsForGroupUpdateGeneral
  | PropsForGroupUpdateAdd
  | PropsForGroupUpdateKicked
  | PropsForGroupUpdateName
  | PropsForGroupUpdateRemove;

export type PropsForGroupUpdateArray = Array<PropsForGroupUpdateType>;

export type PropsForGroupUpdate = {
  changes: PropsForGroupUpdateArray;
};

export type PropsForGroupInvitation = {
  serverName: string;
  url: string;
  direction: MessageModelType;
  acceptUrl: string;
  messageId: string;
};

export type PropsForSearchResults = {
  from: FindAndFormatContactType;
  to: FindAndFormatContactType;
  id: string;
  conversationId: string;
  receivedAt: number | undefined;
  snippet?: string; //not sure about the type of snippet
};

export type PropsForAttachment = {
  id?: string;
  contentType: string;
  size: number;
  width?: number;
  height?: number;
  url: string;
  path?: string;
  fileSize: string | null;
  isVoiceMessage: boolean;
  pending: boolean;
  fileName: string;
  screenshot: {
    contentType: string;
    width: number;
    height: number;
    url?: string;
    path?: string;
  } | null;
  thumbnail: {
    contentType: string;
    width: number;
    height: number;
    url?: string;
    path?: string;
  } | null;
};

export type PropsForMessage = {
  text: string | null;
  id: string;
  direction: MessageModelType;
  timestamp: number;
  receivedAt: number | undefined;
  serverTimestamp: number | undefined;
  serverId: number | undefined;
  status: LastMessageStatusType;
  authorName: string | null;
  authorProfileName: string | null;
  authorPhoneNumber: string;
  conversationType: ConversationTypeEnum;
  convoId: string;
  attachments: Array<PropsForAttachment>;
  previews: any;
  quote: any;
  authorAvatarPath: string | null;
  isUnread: boolean;
  expirationLength: number;
  expirationTimestamp: number | null;
  isPublic: boolean;
  isOpenGroupV2: boolean;
  isKickedFromGroup: boolean | undefined;
  isTrustedForAttachmentDownload: boolean;
  weAreAdmin: boolean;
  isSenderAdmin: boolean;
  isDeletable: boolean;
  isExpired: boolean;
  isBlocked: boolean;
};

export type LastMessageType = {
  status: LastMessageStatusType;
  text: string | null;
};

export interface ReduxConversationType {
  id: string;
  name?: string;
  profileName?: string;
  hasNickname: boolean;

  activeAt?: number;
  lastMessage?: LastMessageType;
  phoneNumber: string;
  type: ConversationTypeEnum;
  isMe: boolean;
  isPublic: boolean;
  isGroup: boolean;
  isPrivate: boolean;
  weAreAdmin: boolean;
  unreadCount: number;
  mentionedUs: boolean;
  isSelected: boolean;
  expireTimer: number;

  isTyping: boolean;
  isBlocked: boolean;
  isKickedFromGroup: boolean;
  subscriberCount: number;
  left: boolean;
  avatarPath?: string; // absolute filepath to the avatar
  groupAdmins?: Array<string>; // admins for closed groups and moderators for open groups
  members: Array<string>; // members for closed groups only

  currentNotificationSetting: ConversationNotificationSettingType;
  notificationForConvo: Array<NotificationForConvoOption>;

  isPinned: boolean;
}

export type ConversationLookupType = {
  [key: string]: ReduxConversationType;
};

export type ConversationsStateType = {
  conversationLookup: ConversationLookupType;
  selectedConversation?: string;
  messages: Array<SortedMessageModelProps>;
  messageDetailProps: MessagePropsDetails | undefined;
  showRightPanel: boolean;
  selectedMessageIds: Array<string>;
  lightBox?: LightBoxOptions;
  quotedMessage?: ReplyingToMessageProps;
};

async function getMessages(
  conversationKey: string,
  numMessages: number
): Promise<Array<SortedMessageModelProps>> {
  const conversation = getConversationController().get(conversationKey);
  if (!conversation) {
    // no valid conversation, early return
    window?.log?.error('Failed to get convo on reducer.');
    return [];
  }
  const unreadCount = await conversation.getUnreadCount();
  let msgCount =
    numMessages || Number(Constants.CONVERSATION.DEFAULT_MESSAGE_FETCH_COUNT) + unreadCount;
  msgCount =
    msgCount > Constants.CONVERSATION.MAX_MESSAGE_FETCH_COUNT
      ? Constants.CONVERSATION.MAX_MESSAGE_FETCH_COUNT
      : msgCount;

  if (msgCount < Constants.CONVERSATION.DEFAULT_MESSAGE_FETCH_COUNT) {
    msgCount = Constants.CONVERSATION.DEFAULT_MESSAGE_FETCH_COUNT;
  }

  const messageSet = await getMessagesByConversation(conversationKey, {
    limit: msgCount,
  });

  // Set first member of series here.
  const messageModelsProps: Array<SortedMessageModelProps> = [];
  messageSet.models.forEach(m => {
    messageModelsProps.push({ ...m.getProps(), firstMessageOfSeries: true });
  });

  const isPublic = conversation.isPublic();

  const sortedMessageProps = sortMessages(messageModelsProps, isPublic);

  // no need to do that `firstMessageOfSeries` on a private chat
  if (conversation.isPrivate()) {
    return sortedMessageProps;
  }
  return updateFirstMessageOfSeriesAndUnread(sortedMessageProps);
}

export type SortedMessageModelProps = MessageModelProps & {
  firstMessageOfSeries: boolean;
  firstUnread?: boolean;
};

const updateFirstMessageOfSeriesAndUnread = (
  messageModelsProps: Array<SortedMessageModelProps>
): Array<SortedMessageModelProps> => {
  // messages are got from the more recent to the oldest, so we need to check if
  // the next messages in the list is still the same author.
  // The message is the first of the series if the next message is not from the same author
  const sortedMessageProps: Array<SortedMessageModelProps> = [];
  const firstUnreadIndex = getFirstMessageUnreadIndex(messageModelsProps);

  for (let i = 0; i < messageModelsProps.length; i++) {
    // Handle firstMessageOfSeries for conditional avatar rendering
    let firstMessageOfSeries = true;
    let firstUnread = false;
    const currentSender = messageModelsProps[i].propsForMessage?.authorPhoneNumber;
    const nextSender =
      i < messageModelsProps.length - 1
        ? messageModelsProps[i + 1].propsForMessage?.authorPhoneNumber
        : undefined;
    if (i >= 0 && currentSender === nextSender) {
      firstMessageOfSeries = false;
    }
    if (i === firstUnreadIndex) {
      firstUnread = true;
    }

    sortedMessageProps.push({ ...messageModelsProps[i], firstMessageOfSeries, firstUnread });
  }
  return sortedMessageProps;
};

type FetchedMessageResults = {
  conversationKey: string;
  messagesProps: Array<SortedMessageModelProps>;
};

const getFirstMessageUnreadIndex = (messages: Array<SortedMessageModelProps>) => {
  if (!messages || messages.length === 0) {
    return -1;
  }

  // iterate over the incoming messages from the oldest one. the first one with isUnread !== undefined is our first unread
  for (let index = messages.length - 1; index > 0; index--) {
    const message = messages[index];
    if (
      message.propsForMessage.direction === 'incoming' &&
      message.propsForMessage.isUnread === true
    ) {
      console.warn('message.propsForMessage', message.propsForMessage);

      return index;
    }
  }

  return -1;
};

export const fetchMessagesForConversation = createAsyncThunk(
  'messages/fetchByConversationKey',
  async ({
    conversationKey,
    count,
  }: {
    conversationKey: string;
    count: number;
  }): Promise<FetchedMessageResults> => {
    const beforeTimestamp = Date.now();
    const messagesProps = await getMessages(conversationKey, count);
    const firstUnreadIndex = getFirstMessageUnreadIndex(messagesProps);
    const afterTimestamp = Date.now();

    const time = afterTimestamp - beforeTimestamp;
    window?.log?.info(`Loading ${messagesProps.length} messages took ${time}ms to load.`);

    const mapped = messagesProps.map((m, index) => {
      if (index === firstUnreadIndex) {
        console.warn('fullfuled firstUnreadIndex', firstUnreadIndex);
        return {
          ...m,
          firstMessageOfSeries: true,
          firstUnread: true,
        };
      }
      return {
        ...m,
        firstMessageOfSeries: true,
        firstUnread: false,
      };
    });
    return {
      conversationKey,
      messagesProps: mapped,
    };
  }
);

// Reducer

function getEmptyState(): ConversationsStateType {
  return {
    conversationLookup: {},
    messages: [],
    messageDetailProps: undefined,
    showRightPanel: false,
    selectedMessageIds: [],
  };
}

function sortMessages(
  messages: Array<SortedMessageModelProps>,
  isPublic: boolean
): Array<SortedMessageModelProps> {
  // we order by serverTimestamp for public convos
  // be sure to update the sorting order to fetch messages from the DB too at getMessagesByConversation
  if (isPublic) {
    return messages.sort((a, b) => {
      return (b.propsForMessage.serverTimestamp || 0) - (a.propsForMessage.serverTimestamp || 0);
    });
  }
  if (messages.some(n => !n.propsForMessage.timestamp && !n.propsForMessage.receivedAt)) {
    throw new Error('Found some messages without any timestamp set');
  }

  // for non public convos, we order by sent_at or received_at timestamp.
  // we assume that a message has either a sent_at or a received_at field set.
  const messagesSorted = messages.sort(
    (a, b) =>
      (b.propsForMessage.timestamp || b.propsForMessage.receivedAt || 0) -
      (a.propsForMessage.timestamp || a.propsForMessage.receivedAt || 0)
  );

  return messagesSorted;
}

function handleMessageAdded(
  state: ConversationsStateType,
  action: PayloadAction<{
    conversationKey: string;
    messageModelProps: MessageModelProps;
  }>
) {
  const { messages } = state;
  const { conversationKey, messageModelProps: addedMessageProps } = action.payload;
  if (conversationKey === state.selectedConversation) {
    const messagesWithNewMessage = [
      ...messages,
      { ...addedMessageProps, firstMessageOfSeries: true },
    ];
    const convo = state.conversationLookup[state.selectedConversation];
    const isPublic = convo?.isPublic || false;

    if (convo) {
      const sortedMessage = sortMessages(messagesWithNewMessage, isPublic);
      const updatedWithFirstMessageOfSeries = updateFirstMessageOfSeriesAndUnread(sortedMessage);

      return {
        ...state,
        messages: updatedWithFirstMessageOfSeries,
      };
    }
  }
  return state;
}

function handleMessageChanged(state: ConversationsStateType, payload: MessageModelProps) {
  const messageInStoreIndex = state?.messages?.findIndex(
    m => m.propsForMessage.id === payload.propsForMessage.id
  );
  if (messageInStoreIndex >= 0) {
    const changedMessage = { ...payload, firstMessageOfSeries: true };
    // we cannot edit the array directly, so slice the first part, insert our edited message, and slice the second part
    const editedMessages = [
      ...state.messages.slice(0, messageInStoreIndex),
      changedMessage,
      ...state.messages.slice(messageInStoreIndex + 1),
    ];

    const convo = state.conversationLookup[payload.propsForMessage.convoId];
    const isPublic = convo?.isPublic || false;
    // reorder the messages depending on the timestamp (we might have an updated serverTimestamp now)
    const sortedMessage = sortMessages(editedMessages, isPublic);
    const updatedWithFirstMessageOfSeries = updateFirstMessageOfSeriesAndUnread(sortedMessage);

    return {
      ...state,
      messages: updatedWithFirstMessageOfSeries,
    };
  }

  return state;
}

function handleMessagesChanged(state: ConversationsStateType, payload: Array<MessageModelProps>) {
  payload.forEach(element => {
    // tslint:disable-next-line: no-parameter-reassignment
    state = handleMessageChanged(state, element);
  });

  return state;
}

function handleMessageExpiredOrDeleted(
  state: ConversationsStateType,
  action: PayloadAction<{
    messageId: string;
    conversationKey: string;
  }>
) {
  const { conversationKey, messageId } = action.payload;
  if (conversationKey === state.selectedConversation) {
    // search if we find this message id.
    // we might have not loaded yet, so this case might not happen
    const messageInStoreIndex = state?.messages.findIndex(m => m.propsForMessage.id === messageId);
    if (messageInStoreIndex >= 0) {
      // we cannot edit the array directly, so slice the first part, and slice the second part,
      // keeping the index removed out
      const editedMessages = [
        ...state.messages.slice(0, messageInStoreIndex),
        ...state.messages.slice(messageInStoreIndex + 1),
      ];

      const updatedWithFirstMessageOfSeries = updateFirstMessageOfSeriesAndUnread(editedMessages);

      // FIXME two other thing we have to do:
      // * update the last message text if the message deleted was the last one
      // * update the unread count of the convo if the message was the one counted as an unread

      return {
        ...state,
        messages: updatedWithFirstMessageOfSeries,
      };
    }

    return state;
  }
  return state;
}

function handleConversationReset(state: ConversationsStateType, action: PayloadAction<string>) {
  const conversationKey = action.payload;
  if (conversationKey === state.selectedConversation) {
    // just empty the list of messages
    return {
      ...state,
      messages: [],
    };
  }
  return state;
}

const conversationsSlice = createSlice({
  name: 'conversations',
  initialState: getEmptyState(),
  reducers: {
    showMessageDetailsView(
      state: ConversationsStateType,
      action: PayloadAction<MessagePropsDetails>
    ) {
      // force the right panel to be hidden when showing message detail view
      return { ...state, messageDetailProps: action.payload, showRightPanel: false };
    },

    closeMessageDetailsView(state: ConversationsStateType) {
      return { ...state, messageDetailProps: undefined };
    },

    openRightPanel(state: ConversationsStateType) {
      return { ...state, showRightPanel: true };
    },
    closeRightPanel(state: ConversationsStateType) {
      return { ...state, showRightPanel: false };
    },
    addMessageIdToSelection(state: ConversationsStateType, action: PayloadAction<string>) {
      if (state.selectedMessageIds.some(id => id === action.payload)) {
        return state;
      }
      return { ...state, selectedMessageIds: [...state.selectedMessageIds, action.payload] };
    },
    removeMessageIdFromSelection(state: ConversationsStateType, action: PayloadAction<string>) {
      const index = state.selectedMessageIds.findIndex(id => id === action.payload);

      if (index === -1) {
        return state;
      }
      return { ...state, selectedMessageIds: state.selectedMessageIds.splice(index, 1) };
    },
    toggleSelectedMessageId(state: ConversationsStateType, action: PayloadAction<string>) {
      const index = state.selectedMessageIds.findIndex(id => id === action.payload);

      if (index === -1) {
        state.selectedMessageIds = [...state.selectedMessageIds, action.payload];
      } else {
        state.selectedMessageIds.splice(index, 1);
      }

      return state;
    },
    resetSelectedMessageIds(state: ConversationsStateType) {
      return { ...state, selectedMessageIds: [] };
    },

    conversationAdded(
      state: ConversationsStateType,
      action: PayloadAction<{
        id: string;
        data: ReduxConversationType;
      }>
    ) {
      const { conversationLookup } = state;

      return {
        ...state,
        conversationLookup: {
          ...conversationLookup,
          [action.payload.id]: action.payload.data,
        },
      };
    },
    conversationChanged(
      state: ConversationsStateType,
      action: PayloadAction<{
        id: string;
        data: ReduxConversationType;
      }>
    ) {
      const { payload } = action;
      const { id, data } = payload;
      const { conversationLookup, selectedConversation } = state;

      const existing = conversationLookup[id];
      // In the change case we only modify the lookup if we already had that conversation
      if (!existing) {
        return state;
      }

      return {
        ...state,
        selectedConversation,
        conversationLookup: {
          ...conversationLookup,
          [id]: data,
        },
      };
    },

    conversationRemoved(
      state: ConversationsStateType,
      action: PayloadAction<{
        id: string;
      }>
    ) {
      const { payload } = action;
      const { id } = payload;
      const { conversationLookup, selectedConversation } = state;
      return {
        ...state,
        conversationLookup: omit(conversationLookup, [id]),
        selectedConversation: selectedConversation === id ? undefined : selectedConversation,
      };
    },

    removeAllConversations() {
      return getEmptyState();
    },

    messageAdded(
      state: ConversationsStateType,
      action: PayloadAction<{
        conversationKey: string;
        messageModelProps: MessageModelProps;
      }>
    ) {
      return handleMessageAdded(state, action);
    },

    messageChanged(state: ConversationsStateType, action: PayloadAction<MessageModelProps>) {
      return handleMessageChanged(state, action.payload);
    },
    messagesChanged(
      state: ConversationsStateType,
      action: PayloadAction<Array<MessageModelProps>>
    ) {
      return handleMessagesChanged(state, action.payload);
    },

    messageExpired(
      state: ConversationsStateType,
      action: PayloadAction<{
        messageId: string;
        conversationKey: string;
      }>
    ) {
      return handleMessageExpiredOrDeleted(state, action);
    },

    messageDeleted(
      state: ConversationsStateType,
      action: PayloadAction<{
        messageId: string;
        conversationKey: string;
      }>
    ) {
      return handleMessageExpiredOrDeleted(state, action);
    },

    conversationReset(state: ConversationsStateType, action: PayloadAction<string>) {
      return handleConversationReset(state, action);
    },

    openConversationExternal(
      state: ConversationsStateType,
      action: PayloadAction<{
        id: string;
        messageId?: string;
      }>
    ) {
      if (state.selectedConversation === action.payload.id) {
        return state;
      }
      state.showRightPanel = false;
      state.messageDetailProps = undefined;
      state.selectedMessageIds = [];
      state.selectedConversation = action.payload.id;
      state.messages = [];
      state.quotedMessage = undefined;
      state.lightBox = undefined;
      return state;
    },
    showLightBox(
      state: ConversationsStateType,
      action: PayloadAction<LightBoxOptions | undefined>
    ) {
      state.lightBox = action.payload;
      return state;
    },
    quoteMessage(
      state: ConversationsStateType,
      action: PayloadAction<ReplyingToMessageProps | undefined>
    ) {
      state.quotedMessage = action.payload;
      return state;
    },
  },
  extraReducers: (builder: any) => {
    // Add reducers for additional action types here, and handle loading state as needed
    builder.addCase(
      fetchMessagesForConversation.fulfilled,
      (state: ConversationsStateType, action: any) => {
        // this is called once the messages are loaded from the db for the currently selected conversation
        const { messagesProps, conversationKey } = action.payload as FetchedMessageResults;
        // double check that this update is for the shown convo
        if (conversationKey === state.selectedConversation) {
          return {
            ...state,
            messages: messagesProps,
          };
        }
        return state;
      }
    );
  },
});

// destructures
export const { actions, reducer } = conversationsSlice;
export const {
  // conversation and messages list
  conversationAdded,
  conversationChanged,
  conversationRemoved,
  removeAllConversations,
  messageExpired,
  messageAdded,
  messageDeleted,
  conversationReset,
  messageChanged,
  messagesChanged,
  openConversationExternal,
  // layout stuff
  showMessageDetailsView,
  closeMessageDetailsView,
  openRightPanel,
  closeRightPanel,
  addMessageIdToSelection,
  resetSelectedMessageIds,
  toggleSelectedMessageId,
  showLightBox,
  quoteMessage,
} = actions;