feat: add sentence validator for catalan (#606)

server/lib/validation/index.js

@@ -1,5 +1,6 @@
 const defaultValidator = require('./languages/default');
 const bas = require('./languages/bas');
+const ca = require('./languages/ca');
 const ckb = require('./languages/ckb');
 const en = require('./languages/en');
 const eo = require('./languages/eo');
@@ -16,6 +17,7 @@ const yue = require('./languages/yue');
 
 const VALIDATORS = {
   bas,
+  ca,
   ckb,
   en,
   eo,

server/lib/validation/languages/ca.js

@@ -0,0 +1,38 @@
+const tokenizeWords = require('talisman/tokenizers/words/gersam');
+
+// Minimum of words that qualify as a sentence.
+const MIN_WORDS = 1;
+
+// Maximum of words allowed per sentence to keep recordings in a manageable duration.
+const MAX_WORDS = 14;
+
+const INVALIDATIONS = [{
+  fn: (sentence) => {
+    const words = tokenizeWords('ca', sentence);
+    return words.length < MIN_WORDS || words.length > MAX_WORDS;
+  },
+  error: `El nombre de paraules ha de ser entre ${MIN_WORDS} i ${MAX_WORDS} (inclòs)`,
+}, {
+  regex: /[0-9]+/,
+  error: 'La frase no pot contenir nombres',
+}, {
+  // This could mean multiple sentences per line.
+  regex: /[?!.].+/,
+  error: 'La frase no pot contenir signes de puntuació al mig',
+}, {
+  // Symbols not allowed, also add them below as well to the regex:
+  // < > + * \ # @ ^ “ ” ‘ ’ ( ) [ ] / { }
+  regex: /[<>+*\\#@^“”‘’(){}[\]/]|\s{2,}|!{2,}/,
+  error: 'La frase no pot contenir simbols o multiples espais o exclamacions',
+}, {
+  // Any words consisting of uppercase letters or uppercase letters with a period
+  // inbetween are considered abbreviations or acronyms.
+  // This currently also matches fooBAR but we most probably don't want that either
+  // as users wouldn't know how to pronounce the uppercase letters.
+  regex: /[A-Z]{2,}|[A-Z]+\.*[A-Z]+/,
+  error: 'La frase no pot contenir abreviacions o acrònims',
+}];
+
+module.exports = {
+  INVALIDATIONS,
+};