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// package children are represented with a Map object, but many file systems
// are case-insensitive and unicode-normalizing, so we need to treat
// node.children.get('FOO') and node.children.get('foo') as the same thing.
const _keys = Symbol('keys')
const _normKey = Symbol('normKey')
const normalize = s => s.normalize('NFKD').toLowerCase()
const OGMap = Map
module.exports = class Map extends OGMap {
constructor (items = []) {
super()
this[_keys] = new OGMap()
for (const [key, val] of items)
this.set(key, val)
}
[_normKey] (key) {
return typeof key === 'string' ? normalize(key) : key
}
get (key) {
const normKey = this[_normKey](key)
return this[_keys].has(normKey) ? super.get(this[_keys].get(normKey))
: undefined
}
set (key, val) {
const normKey = this[_normKey](key)
if (this[_keys].has(normKey))
super.delete(this[_keys].get(normKey))
this[_keys].set(normKey, key)
return super.set(key, val)
}
delete (key) {
const normKey = this[_normKey](key)
if (this[_keys].has(normKey)) {
const prevKey = this[_keys].get(normKey)
this[_keys].delete(normKey)
return super.delete(prevKey)
}
}
has (key) {
const normKey = this[_normKey](key)
return this[_keys].has(normKey) && super.has(this[_keys].get(normKey))
}
}
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