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import { fetchBlockCodeById } from '@agent/lib/block-code'; |
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import { ensureCoreBlocksRegistered } from '@agent/lib/register-blocks'; |
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import apiFetch from '@wordpress/api-fetch'; |
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import { parse, serialize } from '@wordpress/blocks'; |
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|
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const PART_ATTR = 'data-extendify-part'; |
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const PART_ID_ATTR = 'data-extendify-part-block-id'; |
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const PART_SLUG_ATTR = 'data-extendify-part-slug'; |
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|
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// The compositions style.css documents. Anything else has no theme rules: a |
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// pill with no glass has no background, dark with no scrim is white on white. |
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export const HEADER_STATES = { |
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plain: [], |
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sticky: ['ext-header-sticky'], |
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overlay: ['ext-header-overlay'], |
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'overlay-dark': ['ext-header-overlay', 'ext-header--dark'], |
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glass: ['ext-header-sticky', 'ext-header-glass'], |
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'glass-dark': ['ext-header-sticky', 'ext-header-glass', 'ext-header--dark'], |
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pill: [ |
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'ext-header-sticky', |
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'ext-header-overlay', |
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'ext-header-glass', |
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'ext-header-sticky--floating-pill', |
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], |
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'pill-dark': [ |
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'ext-header-sticky', |
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'ext-header-overlay', |
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'ext-header-glass', |
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'ext-header-sticky--floating-pill', |
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'ext-header--dark', |
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], |
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}; |
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|
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const OWNED = [...new Set(Object.values(HEADER_STATES).flat())]; |
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|
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export const headerBlockEl = () => |
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[...document.querySelectorAll(`[${PART_ATTR}="header"]`)].find( |
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(el) => !el.parentElement?.closest(`[${PART_ATTR}="header"]`), |
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) ?? null; |
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|
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export const isExtendableHeader = () => { |
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const el = headerBlockEl(); |
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if (!el) return false; |
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const classes = String(el.className).split(/\s+/); |
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return OWNED.some((cls) => classes.includes(cls)); |
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}; |
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|
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const stateOf = (classes) => { |
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const on = OWNED.filter((cls) => classes.includes(cls)); |
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const match = Object.entries(HEADER_STATES).find( |
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([, want]) => |
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want.length === on.length && want.every((cls) => on.includes(cls)), |
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); |
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return match?.[0] ?? null; |
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}; |
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|
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// Null for a header the theme never composed, so the model is not told a state |
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// that would silently rewrite the other classes. |
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export const currentHeaderState = () => { |
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const el = headerBlockEl(); |
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return el ? stateOf([...el.classList]) : null; |
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}; |
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|
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export const nextClasses = (current, state) => { |
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const want = HEADER_STATES[state]; |
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if (!want) return [...current]; |
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return [...current.filter((cls) => !OWNED.includes(cls)), ...want]; |
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}; |
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|
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export default async ({ state } = {}) => { |
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const el = headerBlockEl(); |
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const blockId = el?.getAttribute(PART_ID_ATTR); |
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const partSlug = el?.getAttribute(PART_SLUG_ATTR); |
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if (!blockId || !partSlug) { |
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return { changed: false, message: 'This page has no header to change.' }; |
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} |
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|
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await ensureCoreBlocksRegistered(); |
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const code = await fetchBlockCodeById(blockId, { |
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kind: 'template-part', |
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partSlug, |
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}); |
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const blocks = code ? parse(code) : []; |
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if (blocks.length !== 1 || !blocks[0].name) { |
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return { changed: false, message: 'The header block could not be read.' }; |
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} |
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|
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const block = blocks[0]; |
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const current = String(block.attributes?.className ?? '') |
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.split(/\s+/) |
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.filter(Boolean); |
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const next = nextClasses(current, state); |
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if (stateOf(next) === stateOf(current)) { |
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return { changed: false, headerState: stateOf(next) }; |
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} |
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|
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const { applied = [] } = await apiFetch({ |
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path: '/extendify/v1/agent/update-blocks', |
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method: 'POST', |
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data: { |
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partSlug, |
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operations: [ |
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{ |
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op: 'edit', |
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blockId, |
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block: serialize([ |
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{ |
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...block, |
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attributes: { ...block.attributes, className: next.join(' ') }, |
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}, |
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]), |
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}, |
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], |
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}, |
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}); |
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if (!applied.length) { |
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return { changed: false, message: 'The header change was not saved.' }; |
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} |
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|
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// Without this the change shows only after a reload. |
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for (const cls of OWNED) el.classList.toggle(cls, next.includes(cls)); |
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return { changed: true, headerState: stateOf(next) }; |
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}; |
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