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/home/nshryvcy/radiantskinclinics.org/wp-content/plugins/extendify_old/src/Agent/lib/svg-helpers.js

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import { colord } from 'colord';

const getDoc = () =>
	document.querySelector('iframe[name="editor-canvas"]')?.contentDocument ||
	document;

const SVGFeFunc = ['feFuncR', 'feFuncG', 'feFuncB'];

export const replaceDuotoneSVG = (() => {
	const originalStates = new Map();

const processSingleDuotone = (slug, duotoneTheme, dynamicDuotone) => {
		let dynamicSlug = '';
		if (!Number.isNaN(Number(slug))) {
			dynamicSlug = slug;
			slug = dynamicDuotone?.[`wp-duotone-${dynamicSlug}`];
		}

// Extract duotone colors from theme settings for the specified slug
		const colors = duotoneTheme?.find((item) => item.slug === slug)?.colors;

// Duotone requires exactly 2 colors (dark and light)
		if (!colors || colors.length !== 2) return false;

const doc = getDoc();
		const filterId = `wp-duotone-${dynamicSlug || slug}`;

const element =
			doc.querySelector(`svg#${filterId}`) ||
			doc.querySelector(`filter#${filterId}`);

if (!element) return false;

// Capture the original state only once per slug
		if (!originalStates.has(dynamicSlug || slug)) {
			const originalState = {
				tableValues: {},
				cssProperty: getComputedStyle(doc.documentElement).getPropertyValue(
					`--wp--preset--duotone--${dynamicSlug || slug}`,
				),
			};

// Store original tableValues for each filter function element
			SVGFeFunc.forEach((func) => {
				const funcElement = element.querySelector(func);
				if (funcElement) {
					originalState.tableValues[func] =
						funcElement.getAttribute('tableValues');
				}
			});

originalStates.set(dynamicSlug || slug, originalState);
		}

// Convert hex colors to normalized RGB values (0-1 range for SVG filters)
		const [darkColor, lightColor] = colors.map((hex) => {
			const { r, g, b } = colord(hex).toRgb();
			return { r: r / 255, g: g / 255, b: b / 255 };
		});

// Update SVG filter function elements for each color channel
		// WordPress duotone filters use feFuncR/G/B elements with tableValues
		// that map original color values to new duotone colors
		SVGFeFunc.forEach((func, index) => {
			const component = ['r', 'g', 'b'][index];
			const funcElement = element.querySelector(func);
			if (funcElement) {
				// Set tableValues to map from dark to light color for this channel
				// Format: "darkValue lightValue" (SVG filter table lookup)
				funcElement.setAttribute(
					'tableValues',
					`${darkColor[component]} ${lightColor[component]}`,
				);
			}
		});

// Update the CSS custom property so WordPress can reference the updated filter
		doc.documentElement.style.setProperty(
			`--wp--preset--duotone--${dynamicSlug || slug}`,
			`url(#${filterId})`,
		);

return true;
	};

return ({ duotoneTheme, dynamicDuotone }) => {
		const processedSlugs = [];
		const doc = getDoc();

const duotoneElements = doc.querySelectorAll('[id^="wp-duotone-"]');

duotoneElements.forEach((element) => {
			const detectedSlug = element.id.replace('wp-duotone-', '');
			if (processSingleDuotone(detectedSlug, duotoneTheme, dynamicDuotone)) {
				processedSlugs.push(detectedSlug);
			}
		});

// Inject CSS filter rules for duotone classes
		if (processedSlugs.length > 0) {
			let style = doc.getElementById('extendify-duotone-overrides');
			if (!style) {
				style = doc.createElement('style');
				style.id = 'extendify-duotone-overrides';
				doc.head.appendChild(style);
			}
			style.textContent = processedSlugs
				.map(
					(slug) =>
						`.wp-duotone-${slug} img { filter: url(#wp-duotone-${slug}) !important; }`,
				)
				.join('\n');
		}

// Return the cleanup function directly
		return processedSlugs.length > 0
			? () => {
					const cleanupDoc = getDoc();

processedSlugs.forEach((processedSlug) => {
						const originalState = originalStates.get(processedSlug);
						if (!originalState) return;

// Restore original tableValues for each filter function element
						SVGFeFunc.forEach((func) => {
							const funcElement = currentElement.querySelector(func);
							if (funcElement && originalState.tableValues[func] !== null) {
								if (originalState.tableValues[func]) {
									funcElement.setAttribute(
										'tableValues',
										originalState.tableValues[func],
									);
								} else {
									funcElement.removeAttribute('tableValues');
								}
							}
						});

// Restore original CSS custom property
						if (originalState.cssProperty) {
							cleanupDoc.documentElement.style.setProperty(
								`--wp--preset--duotone--${processedSlug}`,
								originalState.cssProperty,
							);
						} else {
							cleanupDoc.documentElement.style.removeProperty(
								`--wp--preset--duotone--${processedSlug}`,
							);
						}
					});

cleanupDoc.getElementById('extendify-duotone-overrides')?.remove();
				}
			: null;
	};
})();

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