Init commit

server/core/helpers/regexp.ts

@@ -0,0 +1,32 @@
+// Thanks to https://regex101.com
+export function regexpCapture (str: string, regex: RegExp, maxIterations = 100) {
+  const result: RegExpExecArray[] = []
+  let m: RegExpExecArray
+  let i = 0
+
+  while ((m = regex.exec(str)) !== null && i < maxIterations) {
+    // This is necessary to avoid infinite loops with zero-width matches
+    if (m.index === regex.lastIndex) {
+      regex.lastIndex++
+    }
+
+    result.push(m)
+    i++
+  }
+
+  return result
+}
+
+export function wordsToRegExp (words: string[]) {
+  if (words.length === 0) throw new Error('Need words with at least one element')
+
+  const innerRegex = words
+    .map(word => escapeForRegex(word.trim()))
+    .join('|')
+
+  return new RegExp(`(?:\\P{L}|^)(?:${innerRegex})(?=\\P{L}|$)`, 'iu')
+}
+
+export function escapeForRegex (value: string) {
+  return value.replace(/[\\^$.*+?()[\]{}|]/g, '\\$&')
+}