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'use strict'
module.exports = filter
function filter (data, include, exclude, opts) {
return typeof data === 'object' &&
filterWords(data, include, exclude, opts)
}
function getWords (data, opts) {
return [ data.name ]
.concat((opts && opts.description) ? data.description : [])
.concat((data.maintainers || []).map(function (m) {
return '=' + m.name
}))
.concat(data.versions && data.versions.length && data.url && ('<' + data.url + '>'))
.concat(data.keywords || [])
.map(function (f) { return f && f.trim && f.trim() })
.filter(function (f) { return f })
.join(' ')
.toLowerCase()
}
function filterWords (data, include, exclude, opts) {
var words = getWords(data, opts)
for (var i = 0, l = include.length; i < l; i++) {
if (!match(words, include[i])) return false
}
for (i = 0, l = exclude.length; i < l; i++) {
if (match(words, exclude[i])) return false
}
return true
}
function match (words, pattern) {
if (pattern.charAt(0) === '/') {
pattern = pattern.replace(/\/$/, '')
pattern = new RegExp(pattern.substr(1, pattern.length - 1))
return words.match(pattern)
}
return words.indexOf(pattern) !== -1
}
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