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wp-content/plugins/visual-portfolio/gutenberg/utils/encode-decode/index.js

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+const eCache = {};
+const dCache = {};
+
+/**
+ * Encode URI component with `try {} catch` and caching.
+ *
+ * @param {string} str - decoded string.
+ * @return {string} - new encoded string.
+ */
+export function maybeEncode(str) {
+	// return cached string.
+	if (eCache[str]) {
+		return eCache[str];
+	}
+
+	let result = {};
+
+	// Object
+	if (typeof str === 'object') {
+		Object.keys(str).forEach((k) => {
+			result[maybeEncode(k)] = maybeEncode(str[k]);
+		});
+
+		return result;
+	}
+
+	// String
+	result = str;
+
+	if (typeof result === 'string') {
+		try {
+			// Because of these replacements, some attributes can't be exported to XML without being broken. So, we need to replace it manually with something safe.
+			// https://github.com/WordPress/gutenberg/blob/88645e4b268acf5746e914159e3ce790dcb1665a/packages/blocks/src/api/serializer.js#L246-L271
+			result = result.replace(/--/gm, '_u002d__u002d_');
+
+			result = encodeURIComponent(result);
+		} catch (e) {
+			// eslint-disable-next-line no-console
+			console.warn(e);
+		}
+	}
+
+	// save to cache.
+	eCache[str] = result;
+
+	return result;
+}
+
+/**
+ * Encode URI component with `try {} catch` and caching.
+ *
+ * @param {string} str - decoded string.
+ * @return {string} - new encoded string.
+ */
+export function maybeDecode(str) {
+	// return cached string.
+	if (dCache[str]) {
+		return dCache[str];
+	}
+
+	let result = {};
+
+	// Object
+	if (typeof str === 'object') {
+		Object.keys(str).forEach((k) => {
+			result[maybeDecode(k)] = maybeDecode(str[k]);
+		});
+
+		return result;
+	}
+
+	// String
+	result = str;
+
+	if (typeof result === 'string') {
+		try {
+			result = decodeURIComponent(result);
+
+			// Because of these replacements, some attributes can't be exported to XML without being broken. So, we need to replace it manually with something safe.
+			// https://github.com/WordPress/gutenberg/blob/88645e4b268acf5746e914159e3ce790dcb1665a/packages/blocks/src/api/serializer.js#L246-L271
+			result = result.replace(/_u002d__u002d_/gm, '--');
+		} catch (e) {
+			// eslint-disable-next-line no-console
+			console.warn(e);
+		}
+	}
+
+	// save to cache.
+	dCache[str] = result;
+
+	return result;
+}

wp-content/plugins/visual-portfolio/gutenberg/utils/encode-decode/index.php

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+<?php
+/**
+ * Encode/Decode helper functions.
+ *
+ * @package visual-portfolio
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+/**
+ * Encode string.
+ *
+ * @param string|array $str - string to encode.
+ *
+ * @return string|array
+ */
+function visual_portfolio_encode( $str ) {
+	// Array.
+	if ( is_array( $str ) ) {
+		$result = array();
+
+		foreach ( $str as $k => $val ) {
+			$result[ visual_portfolio_encode( $k ) ] = visual_portfolio_encode( $val );
+		}
+
+		return $result;
+	}
+
+	// String.
+	if ( is_string( $str ) ) {
+		// Because of these replacements, some attributes can't be exported to XML without being broken. So, we need to replace it manually with something safe.
+		// https://github.com/WordPress/gutenberg/blob/88645e4b268acf5746e914159e3ce790dcb1665a/packages/blocks/src/api/serializer.js#L246-L271 .
+		$str = str_replace( '--', '_u002d__u002d_', $str );
+
+        // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.urlencode_urlencode
+		$str = urlencode( $str );
+	}
+
+	return $str;
+}
+
+/**
+ * Decode string.
+ *
+ * @param string|array $str - string to decode.
+ *
+ * @return string|array
+ */
+function visual_portfolio_decode( $str ) {
+	// Array.
+	if ( is_array( $str ) ) {
+		$result = array();
+
+		foreach ( $str as $k => $val ) {
+			$result[ visual_portfolio_decode( $k ) ] = visual_portfolio_decode( $val );
+		}
+
+		return $result;
+	}
+
+	// String.
+	if ( is_string( $str ) ) {
+		$str = urldecode( $str );
+
+		// Because of these replacements, some attributes can't be exported to XML without being broken. So, we need to replace it manually with something safe.
+		// https://github.com/WordPress/gutenberg/blob/88645e4b268acf5746e914159e3ce790dcb1665a/packages/blocks/src/api/serializer.js#L246-L271 .
+		$str = str_replace( '_u002d__u002d_', '--', $str );
+	}
+
+	return $str;
+}