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<script lang="ts">
import { Check, X } from '@lucide/svelte';
import { Card } from '$lib/components/ui/card';
import { Button } from '$lib/components/ui/button';
import { MarkdownContent } from '$lib/components/app';
import { INPUT_CLASSES } from '$lib/constants/input-classes';
import { config } from '$lib/stores/settings.svelte';
import ChatMessageActions from './ChatMessageActions.svelte';
interface Props {
class?: string;
message: DatabaseMessage;
isEditing: boolean;
editedContent: string;
siblingInfo?: ChatMessageSiblingInfo | null;
showDeleteDialog: boolean;
deletionInfo: {
totalCount: number;
userMessages: number;
assistantMessages: number;
messageTypes: string[];
} | null;
onCancelEdit: () => void;
onSaveEdit: () => void;
onEditKeydown: (event: KeyboardEvent) => void;
onEditedContentChange: (content: string) => void;
onCopy: () => void;
onEdit: () => void;
onDelete: () => void;
onConfirmDelete: () => void;
onNavigateToSibling?: (siblingId: string) => void;
onShowDeleteDialogChange: (show: boolean) => void;
textareaElement?: HTMLTextAreaElement;
}
let {
class: className = '',
message,
isEditing,
editedContent,
siblingInfo = null,
showDeleteDialog,
deletionInfo,
onCancelEdit,
onSaveEdit,
onEditKeydown,
onEditedContentChange,
onCopy,
onEdit,
onDelete,
onConfirmDelete,
onNavigateToSibling,
onShowDeleteDialogChange,
textareaElement = $bindable()
}: Props = $props();
let isMultiline = $state(false);
let messageElement: HTMLElement | undefined = $state();
let isExpanded = $state(false);
let contentHeight = $state(0);
const MAX_HEIGHT = 200; // pixels
const currentConfig = config();
let showExpandButton = $derived(contentHeight > MAX_HEIGHT);
$effect(() => {
if (!messageElement || !message.content.trim()) return;
if (message.content.includes('\n')) {
isMultiline = true;
}
const resizeObserver = new ResizeObserver((entries) => {
for (const entry of entries) {
const element = entry.target as HTMLElement;
const estimatedSingleLineHeight = 24;
isMultiline = element.offsetHeight > estimatedSingleLineHeight * 1.5;
contentHeight = element.scrollHeight;
}
});
resizeObserver.observe(messageElement);
return () => {
resizeObserver.disconnect();
};
});
function toggleExpand() {
isExpanded = !isExpanded;
}
</script>
<div
aria-label="System message with actions"
class="group flex flex-col items-end gap-3 md:gap-2 {className}"
role="group"
>
{#if isEditing}
<div class="w-full max-w-[80%]">
<textarea
bind:this={textareaElement}
bind:value={editedContent}
class="min-h-[60px] w-full resize-none rounded-2xl px-3 py-2 text-sm {INPUT_CLASSES}"
onkeydown={onEditKeydown}
oninput={(e) => onEditedContentChange(e.currentTarget.value)}
placeholder="Edit system message..."
></textarea>
<div class="mt-2 flex justify-end gap-2">
<Button class="h-8 px-3" onclick={onCancelEdit} size="sm" variant="outline">
<X class="mr-1 h-3 w-3" />
Cancel
</Button>
<Button class="h-8 px-3" onclick={onSaveEdit} disabled={!editedContent.trim()} size="sm">
<Check class="mr-1 h-3 w-3" />
Send
</Button>
</div>
</div>
{:else}
{#if message.content.trim()}
<div class="relative max-w-[80%]">
<button
class="group/expand w-full text-left {!isExpanded && showExpandButton
? 'cursor-pointer'
: 'cursor-auto'}"
onclick={showExpandButton && !isExpanded ? toggleExpand : undefined}
type="button"
>
<Card
class="rounded-[1.125rem] !border-2 !border-dashed !border-border/50 bg-muted px-3.75 py-1.5 data-[multiline]:py-2.5"
data-multiline={isMultiline ? '' : undefined}
style="border: 2px dashed hsl(var(--border));"
>
<div
class="relative overflow-hidden transition-all duration-300 {isExpanded
? 'cursor-text select-text'
: 'select-none'}"
style={!isExpanded && showExpandButton
? `max-height: ${MAX_HEIGHT}px;`
: 'max-height: none;'}
>
{#if currentConfig.renderUserContentAsMarkdown}
<div bind:this={messageElement} class="text-md {isExpanded ? 'cursor-text' : ''}">
<MarkdownContent class="markdown-system-content" content={message.content} />
</div>
{:else}
<span
bind:this={messageElement}
class="text-md whitespace-pre-wrap {isExpanded ? 'cursor-text' : ''}"
>
{message.content}
</span>
{/if}
{#if !isExpanded && showExpandButton}
<div
class="pointer-events-none absolute right-0 bottom-0 left-0 h-48 bg-gradient-to-t from-muted to-transparent"
></div>
<div
class="pointer-events-none absolute right-0 bottom-4 left-0 flex justify-center opacity-0 transition-opacity group-hover/expand:opacity-100"
>
<Button
class="rounded-full px-4 py-1.5 text-xs shadow-md"
size="sm"
variant="outline"
>
Show full system message
</Button>
</div>
{/if}
</div>
{#if isExpanded && showExpandButton}
<div class="mb-2 flex justify-center">
<Button
class="rounded-full px-4 py-1.5 text-xs"
onclick={(e) => {
e.stopPropagation();
toggleExpand();
}}
size="sm"
variant="outline"
>
Collapse System Message
</Button>
</div>
{/if}
</Card>
</button>
</div>
{/if}
{#if message.timestamp}
<div class="max-w-[80%]">
<ChatMessageActions
actionsPosition="right"
{deletionInfo}
justify="end"
{onConfirmDelete}
{onCopy}
{onDelete}
{onEdit}
{onNavigateToSibling}
{onShowDeleteDialogChange}
{siblingInfo}
{showDeleteDialog}
role="user"
/>
</div>
{/if}
{/if}
</div>
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