Files
web/apps/scandic-web/utils/map.ts
Anton Gunnarsson 80100e7631 Merged in monorepo-step-1 (pull request #1080)
Migrate to a monorepo setup - step 1

* Move web to subfolder /apps/scandic-web

* Yarn + transitive deps

- Move to yarn
- design-system package removed for now since yarn doesn't
support the parameter for token (ie project currently broken)
- Add missing transitive dependencies as Yarn otherwise
prevents these imports
- VS Code doesn't pick up TS path aliases unless you open
/apps/scandic-web instead of root (will be fixed with monorepo)

* Pin framer-motion to temporarily fix typing issue

https://github.com/adobe/react-spectrum/issues/7494

* Pin zod to avoid typ error

There seems to have been a breaking change in the types
returned by zod where error is now returned as undefined
instead of missing in the type. We should just handle this
but to avoid merge conflicts just pin the dependency for
now.

* Pin react-intl version

Pin version of react-intl to avoid tiny type issue where formatMessage
does not accept a generic any more. This will be fixed in a future
commit, but to avoid merge conflicts just pin for now.

* Pin typescript version

Temporarily pin version as newer versions as stricter and results in
a type error. Will be fixed in future commit after merge.

* Setup workspaces

* Add design-system as a monorepo package

* Remove unused env var DESIGN_SYSTEM_ACCESS_TOKEN

* Fix husky for monorepo setup

* Update netlify.toml

* Add lint script to root package.json

* Add stub readme

* Fix react-intl formatMessage types

* Test netlify.toml in root

* Remove root toml

* Update netlify.toml publish path

* Remove package-lock.json

* Update build for branch/preview builds


Approved-by: Linus Flood
2025-02-26 10:36:17 +00:00

89 lines
2.6 KiB
TypeScript

import crypto from "node:crypto"
// Helper function to calculate the latitude offset
export function calculateLatWithOffset(
latitude: number,
offsetPx: number,
zoomLevel: number
): number {
const earthCircumference = 40075017 // Earth's circumference in meters
const tileSize = 256 // Height of a tile in pixels (standard in Google Maps)
// Calculate ground resolution (meters per pixel) at the given latitude and zoom level
const groundResolution =
(earthCircumference * Math.cos((latitude * Math.PI) / 180)) /
(tileSize * Math.pow(2, zoomLevel))
// Calculate the number of meters for the given offset in pixels
const metersOffset = groundResolution * offsetPx
// Convert the meters offset into a latitude offset (1 degree latitude is ~111,320 meters)
const latOffset = metersOffset / 111320
// Return the new latitude by subtracting the offset
return latitude - latOffset
}
/**
* 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}`
}