Review a pull request: validation helpers

Not solved

New validators for sign-up and search. Some regexes take exponential time on the right input. Find them.

src/lib/validate.ts0/3 found

		// Input validation helpers used by the signup and search endpoints

		export const isUsername = (s: string) => /^[a-z0-9_]{3,32}$/.test(s)

	+	export function isEmail(s: string) {
	+	return /^([a-zA-Z0-9_.-]+)+@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/.test(s)
	+	}
	+
	+	export function isSlug(s: string) {
	+	return s.length <= 64 && /^[a-z0-9]+(?:-[a-z0-9]+)*$/.test(s)
	+	}
	+
	+	export function isTagList(s: string) {
	+	return /^(\w+\s?)*$/.test(s)
	+	}
	+
	+	export function searchNotes(notes: Note[], query: string) {
	+	const pattern = new RegExp(query, 'i')
	+	return notes.filter(n => pattern.test(n.body))
	+	}

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