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Added ability to use library in webbrowser with requiring stopwords files #84

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Added ability to use library in webbrowser with requiring stopwords files #84

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76 changes: 70 additions & 6 deletions lib/stopwords.js
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41 changes: 37 additions & 4 deletions src/stopwords.coffee
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Original file line number Diff line number Diff line change
Expand Up @@ -4,20 +4,53 @@ _ = require('lodash')

cache = {}

getStopwords = (lang) ->
switch (lang)
when 'ar' then require('../data/stopwords/stopwords-ar.txt')
when 'bg' then require('../data/stopwords/stopwords-bg.txt')
when 'cs' then require('../data/stopwords/stopwords-cs.txt')
when 'da' then require('../data/stopwords/stopwords-da.txt')
when 'de' then require('../data/stopwords/stopwords-de.txt')
when 'en' then require('../data/stopwords/stopwords-en.txt')
when 'es' then require('../data/stopwords/stopwords-es.txt')
when 'fi' then require('../data/stopwords/stopwords-fi.txt')
when 'fr' then require('../data/stopwords/stopwords-fr.txt')
when 'hu' then require('../data/stopwords/stopwords-hu.txt')
when 'id' then require('../data/stopwords/stopwords-id.txt')
when 'it' then require('../data/stopwords/stopwords-it.txt')
when 'ko' then require('../data/stopwords/stopwords-ko.txt')
when 'nb' then require('../data/stopwords/stopwords-nb.txt')
when 'nl' then require('../data/stopwords/stopwords-nl.txt')
when 'no' then require('../data/stopwords/stopwords-no.txt')
when 'pl' then require('../data/stopwords/stopwords-pl.txt')
when 'pt' then require('../data/stopwords/stopwords-pt.txt')
when 'ru' then require('../data/stopwords/stopwords-ru.txt')
when 'sv' then require('../data/stopwords/stopwords-sv.txt')
when 'th' then require('../data/stopwords/stopwords-th.txt')
when 'tr' then require('../data/stopwords/stopwords-tr.txt')
when 'zh' then require('../data/stopwords/stopwords-zh.txt')
else require('../data/stopwords/stopwords-en.txt')

getFilePath = (language) ->
path.join(__dirname, "..", "data", "stopwords", "stopwords-#{language}.txt")

# Given a language, loads a list of stop words for that language
# and then returns which of those words exist in the given content
module.exports = stopwords = (content, language = 'en') ->
filePath = getFilePath(language)
hasFs = 'existsSync' in fs
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I suggest this line should be hasFs = fs and fs.existsSync.

The current line fails because the compiled JavaScript line treats fs as an array with length, and fs.length does not exist:

function in$(member, list) {
  for (var i = 0, length = list.length; i < length; ++i) // <-- failure at list.length
    if (i in list && list[i] === member)
      return true;
  return false;
}
hasFs = in$('existsSync', fs);

The proposed change succeeds in JavaScript as hasFs = fs && fs.existsSync. This should fix the buildbots.

I would PR to the branch myself, but I'm unfamiliar with CoffeeScript and can't build.


if hasFs
filePath = getFilePath(language)

if !fs.existsSync(filePath)
console.error("WARNING: No stopwords file found for '#{language}' - defaulting to English!")
filePath = getFilePath('en')
if !fs.existsSync(filePath)
console.error("WARNING: No stopwords file found for '#{language}' - defaulting to English!")
filePath = getFilePath('en')

if cache.hasOwnProperty(language)
stopWords = cache[language]
else if !hasFs
stopWords = getStopwords(language)
cache[language] = stopWords
else
stopWords = fs.readFileSync(filePath).toString().split('\n')
.filter((s) -> s.length > 0)
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