@yext/chat-headless/dist/esm/src/models/ChatHeadless.d.ts

A state manager library powered by Redux for Yext Chat integrations

import { Message, MessageNotes, MessageResponse, MessageSource } from "@yext/chat-core";
import { State } from "./state";
import { Store, Unsubscribe } from "@reduxjs/toolkit";
import { StateListener } from "./utils/StateListeners";
import { EventPayload } from "@yext/analytics";
/** Recursively makes all properties of an object optional, adapted for optional nested fields. */
export type RecursivePartial<T> = {
    [K in keyof T]?: Exclude<T[K], undefined> extends object ? RecursivePartial<T[K]> : T[K];
};
/**
 * Provides the functionality needed to interact with the Chat API in a
 * stateful manner.
 *
 * @public
 */
export interface ChatHeadless {
    /**
     * Gets the current state of the ChatHeadless instance.
     *
     * @public
     */
    get state(): State;
    /**
     * Sets the {@link State} to the specified state.
     *
     * @public
     *
     * @param state - The state to set
     */
    setState(state: State): void;
    /**
     * Gets the store that holds the application's state tree.
     *
     * @remarks
     * This is intended for internal usage in the binding packages only.
     *
     * @internal
     */
    get store(): Store;
    /**
     * Sets {@link MetaState.context} to the specified context.
     *
     * @public
     *
     * @param context - The context to set
     */
    setContext(context: unknown): void;
    /**
     * Sets {@link ConversationState.messages} to the specified messages
     *
     * @public
     *
     * @param messages - the messages to set
     */
    setMessages(messages: Message[]): void;
    /**
     * Adds a new message to {@link ConversationState.messages}
     *
     * @public
     *
     * @param message - the message to add to state
     */
    addMessage(message: Message): void;
    /**
     * Sets {@link ConversationState.notes} to the specified notes
     *
     * @public
     *
     * @param notes - the notes to set
     */
    setMessageNotes(notes: MessageNotes): void;
    /**
     * Sets {@link ConversationState.isLoading} to the specified loading state
     *
     * @public
     *
     * @param isLoading - the loading state to set
     */
    setChatLoadingStatus(isLoading: boolean): void;
    /**
     * Sets {@link ConversationState.canSendMessage} to the specified state
     *
     * @public
     *
     * @param canSendMessage - the state to set
     */
    setCanSendMessage(canSendMessage: boolean): void;
    /**
     * Adds additional client SDKs to the base event payload for Yext Analytics API.
     *
     * @remarks
     * This is intended for internal usage in the Yext Chat related packages only.
     *
     * @internal
     */
    addClientSdk(additionalClientSdk: Record<string, string>): void;
    /**
     * Loads the {@link ConversationState} from local storage, if present,
     * and adds a listener to keep the conversation state in sync with the stored
     * state
     *
     * @remarks
     * This is called by default if {@link HeadlessConfig.saveToLocalStorage} is
     * true.
     *
     * @public
     */
    initLocalStorage(): void;
    /**
     * Resets all fields within the {@link ConversationState}, and sets the active
     * client to the `bot` client, if one was provided when constructing the
     * {@link ChatHeadless} instance.
     *
     * If a {@link ChatEventClient} is currently active before reset, that client's
     * `resetSession` method is called.
     *
     * @public
     */
    restartConversation(): void;
    /**
     * Send Chat related analytics event to Yext Analytics API.
     *
     * @remarks
     * once a CHAT_IMPRESSION analytics event is reported, subsequent
     * CHAT_IMPRESSION reports will not be send.
     *
     * @public
     */
    report(eventPayload: Omit<EventPayload, "chat"> & RecursivePartial<Pick<EventPayload, "chat">>): Promise<void>;
    /**
     * Performs a Chat API request for the next message generated by chat bot
     * using the conversation state (e.g. message history and notes). Update
     * the state with the response data.
     *
     * @public
     *
     * @remarks
     * If rejected, an ApiError is returned.
     * A new message is added to the conversation history only if the provided text is not empty.
     *
     * @param text - the text of the next message
     * @param source - the source of the message
     * @returns a Promise of a response from the Chat API
     */
    getNextMessage(text?: string, source?: MessageSource): Promise<MessageResponse | undefined>;
    /**
     * Adds a listener for a specific state value of type T.
     *
     * @public
     *
     * @param listener - The state listener to add
     * @returns The function for removing the added listener
     */
    addListener<T>(listener: StateListener<T>): Unsubscribe;
    /**
     * Performs a Chat Stream API request for the next message generated
     * by chat bot using the conversation state (e.g. message history and notes).
     * The new message's "text" field is continously updated as tokens from the
     * stream are consumed. Remaining conversation state are updated once the
     * final event from the stream is recieved.
     *
     * @public
     *
     * @experimental
     *
     * @remarks
     * If rejected, an ApiError is returned.
     * A new message is added to the conversation history only if the provided text is not empty.
     *
     * @param text - the text of the next message
     * @param source - the source of the message
     * @returns a Promise of the full response from the Chat Stream API
     */
    streamNextMessage(text?: string, source?: MessageSource): Promise<MessageResponse | undefined>;
}
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