Merged in feat/sw-3240-move-staticmap-to-design-system (pull request #2654)

feat(SW-3240): Move StaticMap to design-system

* Move StaticMap to design-system


Approved-by: Joakim Jäderberg

packages/design-system/lib/components/StaticMap/utils.ts

@@ -0,0 +1,64 @@
+import crypto from 'node:crypto'
+
+/**
+ * Util functions taken from https://developers.google.com/maps/documentation/maps-static/digital-signature#sample-code-for-url-signing
+ * Used to sign the URL for the Google Static Maps API.
+ */
+
+/**
+ * Convert from 'web safe' base64 to true base64.
+ *
+ * @param  {string} safeEncodedString The code you want to translate
+ *                                    from a web safe form.
+ * @return {string}
+ */
+function removeWebSafe(safeEncodedString: string) {
+  return safeEncodedString.replace(/-/g, '+').replace(/_/g, '/')
+}
+
+/**
+ * Convert from true base64 to 'web safe' base64
+ *
+ * @param  {string} encodedString The code you want to translate to a
+ *                                web safe form.
+ * @return {string}
+ */
+function makeWebSafe(encodedString: string) {
+  return encodedString.replace(/\+/g, '-').replace(/\//g, '_')
+}
+
+/**
+ * Takes a base64 code and decodes it.
+ *
+ * @param  {string} code The encoded data.
+ * @return {string}
+ */
+function decodeBase64Hash(code: string) {
+  return Buffer.from(code, 'base64')
+}
+
+/**
+ * Takes a key and signs the data with it.
+ *
+ * @param  {string} key  Your unique secret key.
+ * @param  {string} data The url to sign.
+ * @return {string}
+ */
+function encodeBase64Hash(key: Buffer, data: string) {
+  return crypto.createHmac('sha1', key).update(data).digest('base64')
+}
+
+/**
+ * Sign a URL using a secret key.
+ *
+ * @param  {URL} url   The url you want to sign.
+ * @param  {string} secret Your unique secret key.
+ * @return {string}
+ */
+export function getUrlWithSignature(url: URL, secret = '') {
+  const path = url.pathname + url.search
+  const safeSecret = decodeBase64Hash(removeWebSafe(secret))
+  const hashedSignature = makeWebSafe(encodeBase64Hash(safeSecret, path))
+
+  return `${url.toString()}&signature=${hashedSignature}`
+}