Boostnote/browser/lib/search.js

import _ from 'lodash'

export default function searchFromNotes (notes, search) {
  if (search.trim().length === 0) return []
  const searchBlocks = search.split(' ').filter(block => { return block !== '' })

  let foundNotes = notes
  searchBlocks.forEach((block) => {
    foundNotes = findByWordOrTag(foundNotes, block)
  })
  return foundNotes
}

function findByWordOrTag (notes, block) {
  let tag = block
  if (tag.match(/^#.+/)) {
    tag = tag.match(/#(.+)/)[1]
  }
  const tagRegExp = new RegExp(_.escapeRegExp(tag), 'i')
  const wordRegExp = new RegExp(_.escapeRegExp(block), 'i')
  return notes.filter((note) => {
    if (_.isArray(note.tags) && note.tags.some((_tag) => _tag.match(tagRegExp))) {
      return true
    }
    if (note.type === 'SNIPPET_NOTE') {
      return note.description.match(wordRegExp)
    } else if (note.type === 'MARKDOWN_NOTE') {
      return note.content.match(wordRegExp)
    }
    return false
  })
}