{"version":3,"file":"AiChat.cjs","sources":["../../src/components/AiChat.tsx"],"sourcesContent":["import type {\n AiKnowledgeSource,\n AiOpaqueToolDefinition,\n CopilotId,\n MessageId,\n} from \"@liveblocks/core\";\nimport {\n RegisterAiKnowledge,\n RegisterAiTool,\n useAiChatMessages,\n} from \"@liveblocks/react\";\nimport { useLatest } from \"@liveblocks/react/_private\";\nimport {\n type ComponentProps,\n type ComponentType,\n forwardRef,\n type MutableRefObject,\n useEffect,\n useImperativeHandle,\n useRef,\n useState,\n} from \"react\";\n\nimport type { GlobalComponents } from \"../components\";\nimport { ArrowDownIcon } from \"../icons/ArrowDown\";\nimport { SpinnerIcon } from \"../icons/Spinner\";\nimport {\n type AiChatMessageOverrides,\n type AiChatOverrides,\n type AiComposerOverrides,\n type GlobalOverrides,\n useOverrides,\n} from \"../overrides\";\nimport type { MarkdownComponents } from \"../primitives/Markdown\";\nimport { cn } from \"../utils/cn\";\nimport { useIntersectionCallback } from \"../utils/use-visible\";\nimport {\n AiChatAssistantMessage,\n type AiChatAssistantMessageProps,\n} from \"./internal/AiChatAssistantMessage\";\nimport { AiChatUserMessage } from \"./internal/AiChatUserMessage\";\nimport { AiComposer, type AiComposerProps } from \"./internal/AiComposer\";\n\n/**\n * The minimum number of pixels from the bottom of the scrollable area\n * before showing the scroll to bottom indicator.\n */\nconst MIN_DISTANCE_BOTTOM_SCROLL_INDICATOR = 60;\n\nexport type AiChatComponentsEmptyProps = {\n /**\n * The chat ID provided to the `AiChat` component.\n */\n chatId: string;\n\n /**\n * The copilot ID provided to the `AiChat` component.\n */\n copilotId?: string;\n};\n\nexport type AiChatComponentsLoadingProps = Record;\n\nexport type AiChatComponents = {\n /**\n * The component used to render the empty state of the chat.\n */\n Empty: ComponentType;\n\n /**\n * The component used to render the loading state of the chat.\n */\n Loading: ComponentType;\n\n /**\n * The components used to render Markdown content.\n */\n markdown?: Partial;\n};\n\nexport interface AiChatProps extends ComponentProps<\"div\"> {\n /**\n * The ID of the chat the composer belongs to.\n */\n chatId: string;\n\n /**\n * Whether to focus the chat composer on mount.\n */\n autoFocus?: boolean;\n\n /**\n * The ID of the copilot to use to send the message.\n */\n copilotId?: string;\n\n /**\n * The contextual knowledge to include in the chat. May be used by the\n * assistant when generating responses. In addition to the knowledge passed\n * in via this prop, the AiChat instance will also have access to any\n * globally registered knowledge via .\n */\n knowledge?: AiKnowledgeSource[];\n\n /**\n * Tool definitions to make available within this chat. May be used by the assistant when generating responses.\n */\n tools?: Record;\n\n /**\n * The event handler called when the composer is submitted.\n */\n onComposerSubmit?: AiComposerProps[\"onComposerSubmit\"];\n\n /**\n * The layout of the chat and its composer.\n */\n layout?: \"inset\" | \"compact\";\n\n /**\n * How to show or hide reasoning.\n */\n showReasoning?: AiChatAssistantMessageProps[\"showReasoning\"];\n\n /**\n * How to show or hide retrievals.\n */\n showRetrievals?: AiChatAssistantMessageProps[\"showRetrievals\"];\n\n /**\n * Whether to show sources\n */\n showSources?: AiChatAssistantMessageProps[\"showSources\"];\n\n /**\n * The time, in milliseconds, before an AI response will timeout.\n */\n responseTimeout?: number;\n\n /**\n * Override the component's strings.\n */\n overrides?: Partial<\n GlobalOverrides &\n AiComposerOverrides &\n AiChatMessageOverrides &\n AiChatOverrides\n >;\n\n /**\n * Override the component's components.\n */\n components?: Partial;\n}\n\ninterface AiChatMessagesProps extends ComponentProps<\"div\"> {\n messages: NonNullable[\"messages\"]>;\n overrides: AiChatProps[\"overrides\"];\n components: AiChatProps[\"components\"];\n showReasoning: AiChatProps[\"showReasoning\"];\n showRetrievals: AiChatProps[\"showRetrievals\"];\n showSources: AiChatProps[\"showSources\"];\n lastSentMessageId: MessageId | null;\n scrollToBottom: MutableRefObject<\n (behavior: \"instant\" | \"smooth\", includeTrailingSpace?: boolean) => void\n >;\n onScrollAtBottomChange: MutableRefObject<\n (isScrollAtBottom: boolean | null) => void\n >;\n containerRef: MutableRefObject;\n footerRef: MutableRefObject;\n messagesRef: MutableRefObject;\n bottomTrailingMarkerRef: MutableRefObject;\n trailingSpacerRef: MutableRefObject;\n}\n\nconst defaultComponents: AiChatComponents = {\n Empty: () => null,\n Loading: () => (\n
\n \n
\n ),\n};\n\nconst AiChatMessages = forwardRef(\n (\n {\n messages,\n overrides,\n components,\n showReasoning,\n showRetrievals,\n showSources,\n lastSentMessageId,\n scrollToBottom,\n onScrollAtBottomChange,\n containerRef,\n footerRef,\n messagesRef,\n bottomTrailingMarkerRef,\n trailingSpacerRef,\n className,\n ...props\n },\n forwardedRef\n ) => {\n const hasLastSentMessage = lastSentMessageId !== null;\n\n /**\n * Every time the container, footer, or messages list change size,\n * we calculate the trailing space that would allow the penultimate\n * message to be at the top of the viewport, and apply it.\n *\n * ┌─────────────────────────────────────────┐▲ A = The `scroll-margin-top`\n * │ ┌─────────────────────────┐ │▼▲ value of the penultimate message\n * │ │ The penultimate message │ │ │\n * │ └─────────────────────────┘ │ │ B = The height from the top of\n * │ │ │ the penultimate message to the\n * │ ┌─────────────────────────┐ │ │ bottom of the messages list,\n * │ │ The last message │ │ │ including the messages' heights,\n * │ └─────────────────────────┘ │ │ and any padding, gap, etc\n * │ │ │\n * ├ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ┤▲▼\n * │ ││ The trailing space needed to\n * │ = container height - (A + B + C) ││ allow the penultimate message\n * │ ││ to be at the top of the viewport\n * ├ ┬─────────────────────────────────────┬ ┤▼▲\n * │ │ │ │ │\n * │ │ │ │ │ C = The footer's height,\n * │ │ │ │ │ including any padding\n * │ └─────────────────────────────────────┘ │ │\n * └─────────────────────────────────────────┘ ▼\n */\n useEffect(\n () => {\n if (!hasLastSentMessage) {\n return;\n }\n\n const container = containerRef.current;\n const footer = footerRef.current;\n const messages = messagesRef.current;\n\n if (!container || !footer || !messages) {\n return;\n }\n\n const trailingSpacer = trailingSpacerRef.current;\n const bottomTrailingMarker = bottomTrailingMarkerRef.current;\n\n let containerHeight: number | undefined = undefined;\n let footerHeight: number | undefined = undefined;\n let messagesHeight: number | undefined = undefined;\n\n const resetTrailingSpace = () => {\n trailingSpacer?.style.removeProperty(\"height\");\n bottomTrailingMarker?.style.removeProperty(\"top\");\n };\n\n const updateTrailingSpace = (\n updatedContainerHeight?: number,\n updatedFooterHeight?: number,\n updatedMessagesHeight?: number\n ) => {\n if (!trailingSpacer || !bottomTrailingMarker) {\n return;\n }\n\n const lastMessage = messages.lastElementChild;\n const penultimateMessage = lastMessage?.previousElementSibling;\n\n if (updatedContainerHeight === undefined) {\n updatedContainerHeight = container.getBoundingClientRect().height;\n }\n\n if (updatedFooterHeight === undefined) {\n updatedFooterHeight = footer.getBoundingClientRect().height;\n }\n\n if (updatedMessagesHeight === undefined) {\n updatedMessagesHeight = messages.getBoundingClientRect().height;\n }\n\n // If the heights haven't changed, there's no need to update the trailing space.\n if (\n updatedContainerHeight === containerHeight &&\n updatedFooterHeight === footerHeight &&\n updatedMessagesHeight === messagesHeight\n ) {\n if (\n !lastMessage ||\n !penultimateMessage ||\n container.scrollHeight === container.clientHeight\n ) {\n resetTrailingSpace();\n }\n return;\n }\n\n // Now that we have compared them, we can update the heights.\n containerHeight = updatedContainerHeight;\n footerHeight = updatedFooterHeight;\n messagesHeight = updatedMessagesHeight;\n\n // If there's no last pair of messages, there's no need for any trailing space.\n if (!lastMessage || !penultimateMessage) {\n resetTrailingSpace();\n return;\n }\n\n // If the container isn't scrollable, there's no need for trailing space.\n if (container.scrollHeight === container.clientHeight) {\n resetTrailingSpace();\n return;\n }\n\n // A\n const penultimateMessageScrollMarginTop = Number.parseFloat(\n getComputedStyle(penultimateMessage as HTMLElement).scrollMarginTop\n );\n\n // B\n const messagesRect = messages.getBoundingClientRect();\n const penultimateMessageRect =\n penultimateMessage.getBoundingClientRect();\n const heightFromPenultimateMessageTopToMessagesListBottom =\n messagesRect.bottom - penultimateMessageRect.top;\n\n // A + B + C\n const differenceHeight =\n penultimateMessageScrollMarginTop +\n heightFromPenultimateMessageTopToMessagesListBottom +\n (footerHeight ?? 0);\n\n // = container height - (A + B + C)\n const trailingSpace = Math.max(containerHeight - differenceHeight, 0);\n\n // Update the trailing space.\n trailingSpacer.style.height = `${trailingSpace}px`;\n\n // Offset what \"the bottom\" is to the \"scroll at the bottom\" detection logic,\n // so that it doesn't include the trailing space.\n bottomTrailingMarker.style.top = `${-trailingSpace}px`;\n };\n\n const resizeObserver = new ResizeObserver((entries) => {\n let updatedContainerHeight: number | undefined = containerHeight;\n let updatedFooterHeight: number | undefined = footerHeight;\n let updatedMessagesHeight: number | undefined = messagesHeight;\n\n for (const entry of entries) {\n const entryHeight =\n entry.borderBoxSize?.[0]?.blockSize ?? entry.contentRect.height;\n\n if (entry.target === container) {\n updatedContainerHeight = entryHeight;\n } else if (entry.target === footer) {\n updatedFooterHeight = entryHeight;\n } else if (entry.target === messages) {\n updatedMessagesHeight = entryHeight;\n }\n }\n\n updateTrailingSpace(\n updatedContainerHeight,\n updatedFooterHeight,\n updatedMessagesHeight\n );\n });\n\n resizeObserver.observe(container);\n resizeObserver.observe(footer);\n resizeObserver.observe(messages);\n\n // Initialize before the first resize.\n requestAnimationFrame(() => updateTrailingSpace());\n\n return () => {\n resizeObserver.disconnect();\n resetTrailingSpace();\n };\n },\n // This effect only uses stable refs.\n [hasLastSentMessage] // eslint-disable-line react-hooks/exhaustive-deps\n );\n\n /**\n * Update the \"scroll at bottom\" state when needed.\n */\n useIntersectionCallback(\n bottomTrailingMarkerRef,\n (isIntersecting) => {\n onScrollAtBottomChange.current(isIntersecting);\n },\n { root: containerRef, rootMargin: MIN_DISTANCE_BOTTOM_SCROLL_INDICATOR }\n );\n\n /**\n * Instantly scroll to the bottom for the initial state.\n */\n useEffect(\n () => {\n scrollToBottom.current(\"instant\");\n },\n // `scrollToBottom` is a stable ref containing the callback.\n [] // eslint-disable-line react-hooks/exhaustive-deps\n );\n\n /**\n * Scroll to new messages when sending them.\n */\n useEffect(\n () => {\n if (lastSentMessageId) {\n scrollToBottom.current(\"smooth\", true);\n }\n },\n // `scrollToBottom` is a stable ref containing the callback.\n [lastSentMessageId] // eslint-disable-line react-hooks/exhaustive-deps\n );\n\n /**\n * Reset the \"scroll at bottom\" state when the component unmounts.\n */\n useEffect(\n () => {\n const onScrollAtBottomChangeCallback = onScrollAtBottomChange.current;\n\n return () => {\n onScrollAtBottomChangeCallback(null);\n };\n },\n // `onScrollAtBottomChange` is a stable ref containing the callback.\n [] // eslint-disable-line react-hooks/exhaustive-deps\n );\n\n return (\n \n {messages.map((message) => {\n if (message.role === \"user\") {\n return (\n \n );\n } else if (message.role === \"assistant\") {\n return (\n \n );\n } else {\n return null;\n }\n })}\n \n );\n }\n);\n\n// Call `Element.scrollIntoView()` unless the element is not displayed.\n// (with `display: none` or nested within elements with `display: none`)\n// https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollIntoView\n//\n// This avoids browser quirks where they still attempt to scroll to the\n// element but it results in a scroll to the document's top.\nfunction scrollIntoView(\n element: HTMLElement | null,\n options?: ScrollIntoViewOptions\n) {\n if (!element) {\n return;\n }\n\n // Checking for at least one client rect allows 0 width/height elements,\n // unlike checking if the width/height is 0 with `getBoundingClientRect`.\n if (element.getClientRects().length === 0) {\n return;\n }\n\n element.scrollIntoView(options);\n}\n\nexport const AiChat = forwardRef(\n (\n {\n chatId,\n copilotId,\n autoFocus,\n overrides,\n knowledge: localKnowledge,\n tools = {},\n onComposerSubmit,\n layout = \"inset\",\n showReasoning,\n showRetrievals,\n showSources,\n components,\n className,\n responseTimeout,\n ...props\n },\n forwardedRef\n ) => {\n const { messages, isLoading, error } = useAiChatMessages(chatId);\n const [lastSentMessageId, setLastSentMessageId] =\n useState(null);\n\n const $ = useOverrides(overrides);\n const Empty = components?.Empty ?? defaultComponents.Empty;\n const Loading = components?.Loading ?? defaultComponents.Loading;\n\n const containerRef = useRef(null);\n const messagesRef = useRef(null);\n const footerRef = useRef(null);\n const bottomMarkerRef = useRef(null);\n const bottomTrailingMarkerRef = useRef(null);\n const trailingSpacerRef = useRef(null);\n\n const [isScrollAtBottom, setScrollAtBottom] = useState(\n null\n );\n // `useState`'s setter is stable but this is for clarity in the places it's used.\n const onScrollAtBottomChange = useLatest(setScrollAtBottom);\n const isScrollIndicatorVisible =\n messages && isScrollAtBottom !== null ? !isScrollAtBottom : false;\n\n useImperativeHandle(\n forwardedRef,\n () => containerRef.current,\n []\n );\n\n const scrollToBottom = useLatest(\n (behavior: \"instant\" | \"smooth\", includeTrailingSpace = false) => {\n if (includeTrailingSpace) {\n // Scroll to the bottom marker to include the trailing space,\n // but wait for the next tick in case the trailing space hasn't\n // been updated yet. 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\n {isLoading ? (\n \n ) : error !== undefined ? (\n
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\n\n
\n
\n \n scrollToBottom.current(\"smooth\")}\n >\n \n \n \n \n
\n
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