Improve change api (#628)

* fix: jsdoc comments

* more human casting of string values to boolean

* add coerceColour to get named colors to work

* cue can't pass isKeyOfType event check

* dont mutate value

* alloow cue in eventDef

* lint

* css named or hex formatting

* "sideEffects": false

* test colour hex regex

* roll eventDef back to master

* parse property

* don't export cssColour names

* remove import

* only allow string types to colour

* handle transparent colour

* mix alpha with bg colour

* only allow updating events

* descriptive names

* add test for getAccessibleColour

* readability

* move isColourHex to regex-utils

* simplify and add test

apps/server/src/utils/__tests__/coerceType.test.ts

@@ -0,0 +1,21 @@
+import { coerceColour } from '../coerceType.js';
+
+describe('parses a colour string that is', () => {
+  it('valid hex', () => {
+    const color = coerceColour('#000');
+    expect(color).toBe('#000');
+  });
+  it('valid name', () => {
+    const color = coerceColour('darkgoldenrod');
+    expect(color).toBe('darkgoldenrod');
+  });
+  it('invalid hex', () => {
+    expect(() => coerceColour('#not a hex color')).toThrowError(Error('Invalid hex colour received'));
+  });
+  it('invalid name', () => {
+    expect(() => coerceColour('bad name')).toThrowError(Error('Invalid colour name received'));
+  });
+  it('not a string', () => {
+    expect(() => coerceColour(5)).toThrowError(Error('Invalid colour value received'));
+  });
+});