lunr.Builder.prototype.add = function()

in assets/js/lunr/lunr.js [2477:2545]
47 lines of code
11 McCabe index (conditional complexity)

lunr.Builder.prototype.add = function (doc, attributes) {
  var docRef = doc[this._ref],
      fields = Object.keys(this._fields)

  this._documents[docRef] = attributes || {}
  this.documentCount += 1

  for (var i = 0; i < fields.length; i++) {
    var fieldName = fields[i],
        extractor = this._fields[fieldName].extractor,
        field = extractor ? extractor(doc) : doc[fieldName],
        tokens = this.tokenizer(field, {
          fields: [fieldName]
        }),
        terms = this.pipeline.run(tokens),
        fieldRef = new lunr.FieldRef (docRef, fieldName),
        fieldTerms = Object.create(null)

    this.fieldTermFrequencies[fieldRef] = fieldTerms
    this.fieldLengths[fieldRef] = 0

    // store the length of this field for this document
    this.fieldLengths[fieldRef] += terms.length

    // calculate term frequencies for this field
    for (var j = 0; j < terms.length; j++) {
      var term = terms[j]

      if (fieldTerms[term] == undefined) {
        fieldTerms[term] = 0
      }

      fieldTerms[term] += 1

      // add to inverted index
      // create an initial posting if one doesn't exist
      if (this.invertedIndex[term] == undefined) {
        var posting = Object.create(null)
        posting["_index"] = this.termIndex
        this.termIndex += 1

        for (var k = 0; k < fields.length; k++) {
          posting[fields[k]] = Object.create(null)
        }

        this.invertedIndex[term] = posting
      }

      // add an entry for this term/fieldName/docRef to the invertedIndex
      if (this.invertedIndex[term][fieldName][docRef] == undefined) {
        this.invertedIndex[term][fieldName][docRef] = Object.create(null)
      }

      // store all whitelisted metadata about this token in the
      // inverted index
      for (var l = 0; l < this.metadataWhitelist.length; l++) {
        var metadataKey = this.metadataWhitelist[l],
            metadata = term.metadata[metadataKey]

        if (this.invertedIndex[term][fieldName][docRef][metadataKey] == undefined) {
          this.invertedIndex[term][fieldName][docRef][metadataKey] = []
        }

        this.invertedIndex[term][fieldName][docRef][metadataKey].push(metadata)
      }
    }

  }
}