40 lines
1.1 KiB
JavaScript
40 lines
1.1 KiB
JavaScript
function escapeRegexp(text) {
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return text.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&');
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}
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export function censor(text, censoredWords, censoredPattern) {
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let patterns = [],
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originalText = text;
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if (censoredWords && censoredWords.length) {
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patterns = censoredWords.split("|").map(t => `(${escapeRegexp(t)})`);
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}
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if (censoredPattern && censoredPattern.length > 0) {
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patterns.push("(" + censoredPattern + ")");
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}
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if (patterns.length) {
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let censorRegexp;
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try {
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censorRegexp = new RegExp("(\\b(?:" + patterns.join("|") + ")\\b)(?![^\\(]*\\))", "ig");
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if (censorRegexp) {
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let m = censorRegexp.exec(text);
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while (m && m[0]) {
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if (m[0].length > originalText.length) { return originalText; } // regex is dangerous
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const replacement = new Array(m[0].length+1).join('■');
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text = text.replace(new RegExp(`(\\b${escapeRegexp(m[0])}\\b)(?![^\\(]*\\))`, "ig"), replacement);
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m = censorRegexp.exec(text);
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}
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}
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} catch(e) {
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return originalText;
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}
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}
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return text;
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}
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