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// a class to manage an inventory and set of indexes of a set of objects based
// on specific fields.
const { hasOwnProperty } = Object.prototype
const debug = require('./debug.js')
const keys = ['name', 'license', 'funding', 'realpath', 'packageName']
class Inventory extends Map {
#index
constructor () {
super()
this.#index = new Map()
for (const key of keys) {
this.#index.set(key, new Map())
}
}
// XXX where is this used?
get primaryKey () {
return 'location'
}
// XXX where is this used?
get indexes () {
return [...keys]
}
* filter (fn) {
for (const node of this.values()) {
if (fn(node)) {
yield node
}
}
}
add (node) {
const root = super.get('')
if (root && node.root !== root && node.root !== root.root) {
debug(() => {
throw Object.assign(new Error('adding external node to inventory'), {
root: root.path,
node: node.path,
nodeRoot: node.root.path,
})
})
return
}
const current = super.get(node.location)
if (current) {
if (current === node) {
return
}
this.delete(current)
}
super.set(node.location, node)
for (const [key, map] of this.#index.entries()) {
let val
if (hasOwnProperty.call(node, key)) {
// if the node has the value, use it even if it's false
val = node[key]
} else if (key === 'license' && node.package) {
// handling for the outdated "licenses" array, just pick the first one
// also support the alternative spelling "licence"
if (node.package.license) {
val = node.package.license
} else if (node.package.licence) {
val = node.package.licence
} else if (Array.isArray(node.package.licenses)) {
val = node.package.licenses[0]
} else if (Array.isArray(node.package.licences)) {
val = node.package.licences[0]
}
} else if (node[key]) {
val = node[key]
} else {
val = node.package?.[key]
}
if (val && typeof val === 'object') {
// We currently only use license and funding
/* istanbul ignore next - not used */
if (key === 'license') {
val = val.type
} else if (key === 'funding') {
val = val.url
}
}
if (!map.has(val)) {
map.set(val, new Set())
}
map.get(val).add(node)
}
}
delete (node) {
if (!this.has(node)) {
return
}
super.delete(node.location)
for (const [key, map] of this.#index.entries()) {
let val
if (node[key] !== undefined) {
val = node[key]
} else {
val = node.package?.[key]
}
const set = map.get(val)
if (set) {
set.delete(node)
if (set.size === 0) {
map.delete(node[key])
}
}
}
}
query (key, val) {
const map = this.#index.get(key)
if (arguments.length === 2) {
if (map.has(val)) {
return map.get(val)
}
return new Set()
}
return map.keys()
}
has (node) {
return super.get(node.location) === node
}
set (k, v) {
throw new Error('direct set() not supported, use inventory.add(node)')
}
}
module.exports = Inventory
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