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Document slug sanitizing functions.

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This commit is contained in:
Caleb 2017-10-03 10:07:20 -06:00
parent 8fb326ff2b
commit be28f895bc
1 changed files with 10 additions and 2 deletions
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12
src/lib/urlHelper.js
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@ -14,12 +14,20 @@ export function getNewEntryUrl(collectionName, direct) {
return getUrl(`/collections/${ collectionName }/entries/new`, direct);
}
// Unreserved chars from RFC3987.
/* See https://www.w3.org/International/articles/idn-and-iri/#path.
* According to the new IRI (Internationalized Resource Identifier) spec, RFC 3987,
* ASCII chars should be kept the same way as in standard URIs (letters digits _ - . ~).
* Non-ASCII chars (unless they are not in the allowed "ucschars" list) should be percent-encoded.
* If the string is not encoded in Unicode, it should be converted to UTF-8 and normalized first,
* but JS stores strings as UTF-16/UCS-2 internally, so we should not normallize or re-encode.
*/
const uriChars = /[\w\-.~]/i;
const ucsChars = /[\xA0-\u{D7FF}\u{F900}-\u{FDCF}\u{FDF0}-\u{FFEF}\u{10000}-\u{1FFFD}\u{20000}-\u{2FFFD}\u{30000}-\u{3FFFD}\u{40000}-\u{4FFFD}\u{50000}-\u{5FFFD}\u{60000}-\u{6FFFD}\u{70000}-\u{7FFFD}\u{80000}-\u{8FFFD}\u{90000}-\u{9FFFD}\u{A0000}-\u{AFFFD}\u{B0000}-\u{BFFFD}\u{C0000}-\u{CFFFD}\u{D0000}-\u{DFFFD}\u{E1000}-\u{EFFFD}]/u;
export function sanitizeIRI(str, { replacement }) {
let result = "";
// We cannot use a `map` function here because `string.split()` splits things like emojis into surrogate pairs.
// We cannot use a `map` function here because `string.split()`
// splits things like emojis into UTF-16 surrogate pairs,
// and we want to use UTF-8 (it isn't required, but is nicer).
for (const char of str) {
if (uriChars.test(char) || ucsChars.test(char)) {
result += char;