first commit

src/utils/extractMentions.js

@@ -0,0 +1,25 @@
+// Extracts mentions from text.
+
+import { atSigns, endMentionMatch, validMention } from './regex'
+
+export default function (text) {
+  if (!text || !text.match(atSigns)) {
+    return []
+  }
+
+  const mentions = []
+
+  text.replace(validMention, function (match, before, atSign, mentionText, offset, chunk) {
+    const after = chunk.slice(offset + match.length)
+    if (!after.match(endMentionMatch)) {
+      const startPosition = offset + before.length
+      const endPosition = startPosition + mentionText.length + 1
+      mentions.push({
+        username: mentionText,
+        indices: [startPosition, endPosition]
+      })
+    }
+  })
+
+  return mentions
+}