Remove unused

This commit is contained in:
Chi Vinh Le
2018-03-22 23:59:35 +01:00
parent a1fcb6e171
commit 543dde12aa
@@ -1,98 +0,0 @@
import React from 'react';
import { matchLinks } from './index';
import memoize from 'lodash/memoize';
function escapeRegExp(string) {
return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
}
// generate a regulare expression that catches the `phrases`.
function generateRegExp(phrases) {
const inner = phrases
.map(phrase =>
phrase
.split(/\s+/)
.map(word => escapeRegExp(word))
.join('[\\s"?!.]+')
)
.join('|');
const pattern = `(^|[^\\w])(${inner})(?=[^\\w]|$)`;
try {
return new RegExp(pattern, 'iu');
} catch (_err) {
// IE does not support unicode support, so we'll create one without.
return new RegExp(pattern, 'i');
}
}
// Generate a regular expression detecting `suspectWords` and `bannedWords` phrases.
function getPhrasesRegexp(suspectWords, bannedWords) {
return generateRegExp([...suspectWords, ...bannedWords]);
}
// Memoized version as arguments rarely change.
const getPhrasesRegexpMemoized = memoize(getPhrasesRegexp);
function nl2br(body, keyPrefix) {
const tokens = body.split('\n').reduce((tokens, t, i) => {
if (i !== 0) {
tokens.push(<br key={`${keyPrefix}_${i}`} />);
}
tokens.push(t);
return tokens;
}, []);
return tokens;
}
// markPhrases looks for `supsectWords` and `bannedWords` inside `body` and highlights them by returning
// an array of React Elements.
function markPhrases(body, suspectWords, bannedWords, keyPrefix) {
const regexp = getPhrasesRegexpMemoized(suspectWords, bannedWords);
const tokens = body.split(regexp);
return tokens.map(
(token, i) =>
i % 3 === 2 ? <mark key={`${keyPrefix}_${i}`}>{token}</mark> : token
);
}
// markLinks looks for links inside `body` and highlights them by returning
// an array of React Elements.
function markLinks(body, keyPrefix) {
const matches = matchLinks(body);
const content = [];
let index = 0;
if (matches) {
matches.forEach((match, i) => {
content.push(body.substring(index, match.index));
content.push(
<mark key={`${keyPrefix}_${i}`}>
<a href={match.url} target="_blank">
{match.text}
</a>
</mark>
);
index = match.lastIndex;
});
}
content.push(body.substring(index));
return content;
}
export function renderText(body, suspectWords, bannedWords) {
return nl2br(body).map((element, index) => {
// Skip br tags.
if (typeof element !== 'string') {
return element;
}
return markLinks(element, index).map((element, index) => {
// Keep highlighted links.
if (typeof element !== 'string') {
return element;
}
// Highlight suspect and banned phrase inside this part of text.
return markPhrases(element, suspectWords, bannedWords, index);
});
});
}