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nanobot/webui/src/components/thread/ModelPresetBadge.tsx
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TypeScript

import {
useEffect,
useLayoutEffect,
useRef,
useState,
type KeyboardEvent,
type PointerEvent,
} from "react";
import { CircleHelp, Sparkles } from "lucide-react";
import { useLogoFallback } from "@/hooks/useLogoFallback";
import { inferProviderFromModelName, providerBrand } from "@/lib/provider-brand";
import { cn } from "@/lib/utils";
export interface ModelPresetOption {
name: string;
label: string;
model?: string | null;
provider?: string | null;
}
interface ModelPresetBadgeProps {
label: string;
modelDetail?: string | null;
modelPreset?: string | null;
modelPresets?: ModelPresetOption[];
onPresetChange?: (name: string) => void;
provider?: string | null;
providerLabel?: string | null;
needsSetup?: boolean;
fallbackModelName?: string | null;
isHero: boolean;
onClick?: () => void;
}
interface PresetGesture {
active: boolean;
baseIndex: number;
latestY: number;
pointerId: number;
startY: number;
step: number;
target: HTMLElement;
timer: ReturnType<typeof setTimeout> | null;
}
interface PresetMotion {
index: number;
remainder: number;
settling: boolean;
}
const LONG_PRESS_MS = 400;
const PRESS_SLOP_PX = 8;
const PILL_GAP_PX = 4;
const PILL_OFFSETS = [-2, -1, 0, 1, 2] as const;
const HANDOFF_THRESHOLD = 0.56;
const DOCK_MAX_SCALE = 1.08;
const DOCK_RADIUS = 1.5;
const SETTLE_MS = 180;
function wrapIndex(index: number, length: number): number {
return ((index % length) + length) % length;
}
function dockScale(distanceFromFocus: number): number {
const distance = Math.abs(distanceFromFocus);
if (distance >= DOCK_RADIUS) return 1;
const influence = (1 + Math.cos(Math.PI * distance / DOCK_RADIUS)) / 2;
return 1 + (DOCK_MAX_SCALE - 1) * influence;
}
function stepWithHysteresis(raw: number, current: number): number {
let next = current;
while (raw > next + HANDOFF_THRESHOLD) next += 1;
while (raw < next - HANDOFF_THRESHOLD) next -= 1;
return next;
}
function preventTouchScroll(event: TouchEvent) {
if (event.cancelable) event.preventDefault();
}
export function ModelPresetBadge({
label,
modelDetail,
modelPreset,
modelPresets = [],
onPresetChange,
provider,
providerLabel,
needsSetup = false,
fallbackModelName,
isHero,
onClick,
}: ModelPresetBadgeProps) {
const activeName = modelPreset?.trim() || "";
const listedIndex = modelPresets.findIndex((preset) => preset.name === activeName);
const activePreset: ModelPresetOption = {
...(listedIndex >= 0 ? modelPresets[listedIndex] : undefined),
name: activeName,
label: label || modelPresets[listedIndex]?.label || activeName,
model: modelDetail ?? modelPresets[listedIndex]?.model,
provider: provider || modelPresets[listedIndex]?.provider,
};
const presets = !activeName
? modelPresets
: listedIndex < 0
? [activePreset, ...modelPresets]
: modelPresets.map((preset, index) => index === listedIndex ? activePreset : preset);
const interactive = Boolean(onClick);
const canSwitch = !interactive && Boolean(onPresetChange) && activeName !== "" && presets.length > 1;
const currentIndex = Math.max(0, presets.findIndex((preset) => preset.name === activeName));
const pillHeight = isHero ? 32 : 36;
const pillStride = pillHeight + PILL_GAP_PX;
const [motion, setMotion] = useState<PresetMotion | null>(null);
const gestureRef = useRef<PresetGesture | null>(null);
function clearGesture() {
const gesture = gestureRef.current;
if (gesture?.timer) clearTimeout(gesture.timer);
if (gesture?.active) gesture.target.removeEventListener("touchmove", preventTouchScroll);
gestureRef.current = null;
}
useEffect(() => {
if (!canSwitch) {
clearGesture();
setMotion(null);
}
return clearGesture;
}, [canSwitch]);
useEffect(() => {
if (!motion?.settling) return;
const timer = setTimeout(() => setMotion(null), SETTLE_MS + 80);
return () => clearTimeout(timer);
}, [motion?.settling]);
function updateMotion(gesture: PresetGesture, clientY: number) {
const raw = -(clientY - gesture.startY) / pillStride;
gesture.step = stepWithHysteresis(raw, gesture.step);
setMotion({ index: gesture.baseIndex + gesture.step, remainder: raw - gesture.step, settling: false });
}
function handlePointerDown(event: PointerEvent<HTMLElement>) {
if (!canSwitch || gestureRef.current || motion || event.isPrimary === false) return;
if (event.pointerType === "mouse" && event.button !== 0) return;
const gesture: PresetGesture = {
active: false,
baseIndex: currentIndex,
latestY: event.clientY,
pointerId: event.pointerId,
startY: event.clientY,
step: 0,
target: event.currentTarget,
timer: null,
};
gesture.timer = setTimeout(() => {
if (gestureRef.current !== gesture) return;
gesture.active = true;
updateMotion(gesture, gesture.latestY);
gesture.target.addEventListener("touchmove", preventTouchScroll, { passive: false });
try {
gesture.target.setPointerCapture(gesture.pointerId);
} catch { /* The pointer may already have ended. */ }
}, LONG_PRESS_MS);
gestureRef.current = gesture;
}
function handlePointerMove(event: PointerEvent<HTMLElement>) {
const gesture = gestureRef.current;
if (!gesture || gesture.pointerId !== event.pointerId) return;
gesture.latestY = event.clientY;
if (!gesture.active) {
if (Math.abs(event.clientY - gesture.startY) > PRESS_SLOP_PX) clearGesture();
return;
}
event.preventDefault();
updateMotion(gesture, event.clientY);
}
function finishGesture(event: PointerEvent<HTMLElement>, commit: boolean) {
const gesture = gestureRef.current;
if (!gesture || gesture.pointerId !== event.pointerId) return;
clearGesture();
if (event.currentTarget.hasPointerCapture?.(gesture.pointerId)) {
event.currentTarget.releasePointerCapture?.(gesture.pointerId);
}
if (!commit || !gesture.active) {
setMotion(null);
return;
}
const selected = presets[wrapIndex(gesture.baseIndex + gesture.step, presets.length)];
setMotion((current) => current && { ...current, remainder: 0, settling: true });
if (selected && selected.name !== activeName) onPresetChange?.(selected.name);
}
function handleKeyDown(event: KeyboardEvent<HTMLElement>) {
if (!canSwitch) return;
const targetByKey: Record<string, number> = {
ArrowUp: currentIndex - 1,
ArrowDown: currentIndex + 1,
Home: 0,
End: presets.length - 1,
};
const target = targetByKey[event.key];
if (target === undefined) return;
event.preventDefault();
const next = presets[wrapIndex(target, presets.length)];
if (next?.name !== activeName) onPresetChange?.(next.name);
}
const previewIndex = wrapIndex(motion?.index ?? currentIndex, presets.length);
const previewPreset = presets[previewIndex];
const Container = interactive || canSwitch ? "button" : "span";
const trackOffset = motion ? -pillStride * (2 + motion.remainder) : 0;
return (
<Container
data-switching={motion ? "true" : undefined}
data-settling={motion?.settling ? "true" : undefined}
aria-label={label}
aria-orientation={canSwitch ? "vertical" : undefined}
aria-valuemax={canSwitch ? presets.length - 1 : undefined}
aria-valuemin={canSwitch ? 0 : undefined}
aria-valuenow={canSwitch ? previewIndex : undefined}
aria-valuetext={canSwitch ? previewPreset?.label || label : undefined}
role={canSwitch ? "spinbutton" : undefined}
type={interactive || canSwitch ? "button" : undefined}
onClick={interactive ? onClick : undefined}
onKeyDown={handleKeyDown}
onPointerDown={handlePointerDown}
onPointerMove={handlePointerMove}
onPointerLeave={(event) => {
const gesture = gestureRef.current;
if (gesture && gesture.pointerId === event.pointerId && !gesture.active) clearGesture();
}}
onPointerUp={(event) => finishGesture(event, true)}
onPointerCancel={(event) => finishGesture(event, false)}
onLostPointerCapture={(event) => finishGesture(event, false)}
onContextMenu={(event) => {
if (gestureRef.current?.active) event.preventDefault();
}}
onDragStart={(event) => event.preventDefault()}
style={{ touchAction: canSwitch ? "manipulation" : undefined }}
className={cn(
"thread-composer-model-badge group/model-badge relative inline-flex w-fit min-w-0 max-w-[min(18rem,44vw)] justify-end appearance-none border-0 bg-transparent p-0 shadow-none",
interactive && "cursor-pointer",
canSwitch && "cursor-grab select-none focus-visible:outline-none",
motion && "z-10 cursor-grabbing",
isHero ? "h-8" : "h-9",
)}
>
<PresetPill
className={motion && "invisible"}
label={label}
modelDetail={modelDetail}
provider={provider}
providerLabel={providerLabel}
needsSetup={needsSetup}
fallbackModelName={fallbackModelName}
isHero={isHero}
/>
{motion ? (
<span
data-testid="composer-model-pill-viewport"
className={cn(
"composer-model-pill-viewport pointer-events-none absolute -left-2 right-0 overflow-hidden bg-transparent",
isHero ? "-bottom-2.5 -top-2.5" : "-bottom-3 -top-3",
)}
aria-hidden
>
<span
data-testid="composer-model-pill-track"
data-settling={motion.settling ? "true" : undefined}
className="composer-model-pill-track ml-auto flex w-[calc(100%-0.5rem)] flex-col items-end gap-1 will-change-transform"
onTransitionEnd={(event) => {
if (motion.settling && event.currentTarget === event.target) setMotion(null);
}}
style={{
paddingTop: isHero ? "10px" : "12px",
transform: `translate3d(0, ${trackOffset}px, 0)`,
}}
>
{PILL_OFFSETS.map((offset) => {
const virtualIndex = motion.index + offset;
const preset = presets[wrapIndex(virtualIndex, presets.length)];
const scale = motion.settling ? 1 : dockScale(offset - motion.remainder);
return (
<PresetPill
key={virtualIndex}
label={preset.label || preset.name}
modelDetail={preset.model}
provider={preset.provider}
isHero={isHero}
offset={offset}
scale={scale}
/>
);
})}
</span>
</span>
) : null}
</Container>
);
}
function PresetPill({
className,
label,
modelDetail,
provider,
providerLabel,
needsSetup = false,
fallbackModelName,
isHero,
offset,
scale,
}: {
className?: string | false | null;
label: string;
modelDetail?: string | null;
provider?: string | null;
providerLabel?: string | null;
needsSetup?: boolean;
fallbackModelName?: string | null;
isHero: boolean;
offset?: number;
scale?: number;
}) {
const labelRef = useRef<HTMLSpanElement | null>(null);
const [labelOverflows, setLabelOverflows] = useState(false);
const inferredProvider = needsSetup
? null
: provider || inferProviderFromModelName(modelDetail || label);
const brand = providerBrand(inferredProvider);
const { logoUrl, onLogoError, onLogoLoad } = useLogoFallback(brand?.logoUrls);
const title = [...new Set([label, modelDetail, providerLabel].filter(Boolean))].join(" · ");
const logoTestId = offset !== undefined
? undefined
: needsSetup
? "composer-model-setup-icon"
: `composer-model-logo${inferredProvider ? `-${inferredProvider}` : ""}`;
useLayoutEffect(() => {
const node = labelRef.current;
if (!node) return;
const update = () => setLabelOverflows(node.scrollWidth > node.clientWidth + 1);
update();
const observer = typeof ResizeObserver === "undefined" ? null : new ResizeObserver(update);
observer?.observe(node);
return () => observer?.disconnect();
}, [label]);
return (
<span
data-fallback={fallbackModelName ? "true" : undefined}
data-preset-offset={offset}
title={fallbackModelName || title || undefined}
className={cn(
"composer-model-badge composer-model-pill inline-flex h-full w-fit max-w-full min-w-0 shrink-0 items-center rounded-full border border-border/55 bg-card font-semibold text-foreground/58",
offset === undefined && "shadow-[0_2px_8px_rgba(15,23,42,0.045)]",
"transition-[color,background-color,border-color,transform] duration-150 ease-out group-focus-visible/model-badge:ring-2 group-focus-visible/model-badge:ring-ring/45",
needsSetup && "border-amber-500/35 bg-amber-50/70 text-amber-900 dark:bg-amber-500/10 dark:text-amber-200",
isHero ? "gap-1.5 px-2.5 text-[12px]" : "gap-2 px-3 text-[12.5px]",
offset !== undefined && "composer-model-pill-dock",
className,
)}
style={scale === undefined ? undefined : {
height: `${isHero ? 32 : 36}px`,
transform: `scale(${scale.toFixed(4)})`,
zIndex: Math.round(scale * 100),
}}
>
<span
data-testid={logoTestId}
className={cn(
"grid shrink-0 place-items-center overflow-hidden",
needsSetup ? "text-amber-800 dark:text-amber-200" : "rounded-full border bg-background",
isHero ? "h-4 w-4" : "h-[18px] w-[18px]",
)}
style={{
borderColor: !needsSetup && brand ? `${brand.color}28` : undefined,
boxShadow: !needsSetup && brand ? `inset 0 0 0 1px ${brand.color}18` : undefined,
}}
aria-hidden
>
{needsSetup ? (
<CircleHelp className={cn(isHero ? "h-3 w-3" : "h-3.5 w-3.5")} strokeWidth={1.8} />
) : logoUrl ? (
<img
src={logoUrl}
alt=""
draggable={false}
decoding="async"
loading="lazy"
className={cn("object-contain", isHero ? "h-3 w-3" : "h-3.5 w-3.5")}
onLoad={onLogoLoad}
onError={onLogoError}
/>
) : brand ? (
<span
className={cn(
"grid h-full w-full place-items-center rounded-full text-white",
isHero ? "text-[7.5px]" : "text-[8px]",
)}
style={{ backgroundColor: brand.color }}
>
{brand.initials.slice(0, 2)}
</span>
) : (
<Sparkles className="h-3 w-3 text-muted-foreground/65" />
)}
</span>
<span
ref={labelRef}
className={cn(
"thread-composer-model-label min-w-0 overflow-hidden whitespace-nowrap text-center",
labelOverflows && "thread-composer-model-label-fade",
)}
>
{label}
</span>
</span>
);
}