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40 lines
986 B
CoffeeScript
40 lines
986 B
CoffeeScript
db = require("./DB")
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LRU = require("lru-cache")
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cacheOpts =
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max: 5000
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maxAge: 1000 * 60 * 60
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cache = LRU(cacheOpts)
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logger = require 'logger-sharelatex'
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metrics = require('metrics-sharelatex')
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module.exports = LearnedWordsManager =
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learnWord: (user_token, word, callback = (error)->) ->
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cache.del(user_token)
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db.spellingPreferences.update {
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token: user_token
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}, {
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$push: learnedWords: word
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}, {
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upsert: true
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}, callback
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getLearnedWords: (user_token, callback = (error, words)->) ->
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cachedWords = cache.get(user_token)
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if cachedWords
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logger.info user_token:user_token, "cache hit"
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metrics.inc "cache-hit", 0.1
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return callback(null, cachedWords)
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metrics.inc "cache-miss", 0.1
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logger.info user_token:user_token, "cache miss"
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db.spellingPreferences.findOne token: user_token, (error, preferences) ->
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return callback error if error?
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words = preferences?.learnedWords || []
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cache.set(user_token, words)
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callback null, words
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