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import type { SizeToEnvironmentMap, IconSizeMap } from './types'
import FzButton from './FzButton.vue'
/**
* Minimum number of FzButton components required in FzButtonGroup slot.
*
* FzButtonGroup enforces a minimum of 2 buttons to ensure proper visual balance
* and consistent user experience across form actions.
*/
const MIN_BUTTONS = 2
/**
* Maximum number of FzButton components allowed in FzButtonGroup slot.
*
* FzButtonGroup enforces a maximum of 3 buttons to prevent visual clutter
* and maintain optimal spacing with the fixed 16px gap layout.
*/
const MAX_BUTTONS = 3
/**
* Maps deprecated ButtonSize to ButtonEnvironment
*
* Used for backward compatibility when size prop is provided instead of environment.
* All sizes map to environments: xs/sm/md → backoffice, lg → frontoffice
*/
export const sizeToEnvironmentMapping: SizeToEnvironmentMap = {
xs: 'backoffice',
sm: 'backoffice',
md: 'backoffice',
lg: 'frontoffice'
}
/**
* Maps ButtonSize to IconSize for FzIconButton
*
* Used by FzIconButton to determine icon size based on button size.
*/
export const iconSizeMap: IconSizeMap = {
xs: 'sm',
sm: 'md',
md: 'lg',
lg: 'lg'
}
/**
* Checks if a VNode represents a FzButton component.
*
* @param vnode - The VNode to check
* @returns true if the VNode is a FzButton component
*/
export function isButtonComponent(vnode: VNode): boolean {
return vnode.type === FzButton
}
/**
* Recursively collects all FzButton components from a VNode tree.
*
* Handles Vue Fragment nodes created by v-if, v-else, v-for directives.
*
* @param vnode - The VNode to analyze recursively
* @param buttons - Array to collect found FzButton components
* @returns array of all FzButton VNodes found at any depth
*/
export function collectButtons(vnode: VNode, buttons: VNode[] = []): VNode[] {
if (isButtonComponent(vnode)) {
buttons.push(vnode)
return buttons
}
if (typeof vnode.type === 'symbol') {
const children = vnode.children
if (Array.isArray(children)) {
children.forEach((child) => {
if (typeof child === 'object' && child !== null && 'type' in child) {
collectButtons(child as VNode, buttons)
}
})
}
}
return buttons
}
/**
* Recursively collects all non-FzButton elements from a VNode tree.
*
* Used to detect invalid elements (HTML elements, other Vue components, text nodes).
*
* @param vnode - The VNode to analyze recursively
* @param invalidElements - Array to collect found invalid elements
* @returns array of all non-FzButton VNodes found at any depth
*/
export function collectInvalidElements(vnode: VNode, invalidElements: VNode[] = []): VNode[] {
if (isButtonComponent(vnode)) {
return invalidElements
}
if (typeof vnode.type === 'symbol') {
const children = vnode.children
if (Array.isArray(children)) {
children.forEach((child) => {
if (typeof child === 'object' && child !== null && 'type' in child) {
collectInvalidElements(child as VNode, invalidElements)
} else if (typeof child === 'string' && child.trim() !== '') {
invalidElements.push(child as any)
}
})
}
} else {
invalidElements.push(vnode)
}
return invalidElements
}
/**
* Validates FzButtonGroup slot content.
*
* Ensures slot contains only FzButton components within MIN_BUTTONS-MAX_BUTTONS range.
*
* @param vnodes - Array of VNodes from the slot to validate
* @returns Object with validation status, button count, and error message if invalid
*/
export function validateButtonGroupSlot(vnodes: VNode[]): { valid: boolean; buttonCount: number; error: string | null } {
if (!vnodes || vnodes.length === 0) {
return {
valid: false,
buttonCount: 0,
error: `[FzButtonGroup] Slot is empty. Expected ${MIN_BUTTONS}-${MAX_BUTTONS} FzButton components. Only FzButton components are allowed.`
}
}
const buttons: VNode[] = []
vnodes.forEach((vnode) => {
collectButtons(vnode, buttons)
})
const buttonCount = buttons.length
const invalidElements: VNode[] = []
vnodes.forEach((vnode) => {
collectInvalidElements(vnode, invalidElements)
})
if (invalidElements.length > 0) {
return {
valid: false,
buttonCount,
error: `[FzButtonGroup] Slot contains invalid elements. Only FzButton components are allowed (found ${buttonCount} FzButton, ${invalidElements.length} invalid element(s)).`
}
}
if (buttonCount < MIN_BUTTONS) {
return {
valid: false,
buttonCount,
error: `[FzButtonGroup] Too few buttons. Expected ${MIN_BUTTONS}-${MAX_BUTTONS} FzButton components, found ${buttonCount}.`
}
}
if (buttonCount > MAX_BUTTONS) {
return {
valid: false,
buttonCount,
error: `[FzButtonGroup] Too many buttons. Expected ${MIN_BUTTONS}-${MAX_BUTTONS} FzButton components, found ${buttonCount}.`
}
}
return {
valid: true,
buttonCount,
error: null
}
}
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