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'use strict'
const URL = require('url').URL
exports.getFundingInfo = getFundingInfo
exports.retrieveFunding = retrieveFunding
exports.validFundingField = validFundingField
const flatCacheSymbol = Symbol('npm flat cache')
exports.flatCacheSymbol = flatCacheSymbol
// supports object funding and string shorthand, or an array of these
// if original was an array, returns an array; else returns the lone item
function retrieveFunding (funding) {
const sources = [].concat(funding || []).map(item => (
typeof item === 'string'
? { url: item }
: item
))
return Array.isArray(funding) ? sources : sources[0]
}
// Is the value of a `funding` property of a `package.json`
// a valid type+url for `npm fund` to display?
function validFundingField (funding) {
if (!funding) return false
if (Array.isArray(funding)) {
return funding.every(f => !Array.isArray(f) && validFundingField(f))
}
try {
var parsed = new URL(funding.url || funding)
} catch (error) {
return false
}
if (
parsed.protocol !== 'https:' &&
parsed.protocol !== 'http:'
) return false
return Boolean(parsed.host)
}
const empty = () => Object.create(null)
function getFundingInfo (idealTree, opts) {
let packageWithFundingCount = 0
const flat = empty()
const seen = new Set()
const { countOnly } = opts || {}
const _trailingDependencies = Symbol('trailingDependencies')
function tracked (name, version) {
const key = String(name) + String(version)
if (seen.has(key)) {
return true
}
seen.add(key)
}
function retrieveDependencies (dependencies) {
const trailing = dependencies[_trailingDependencies]
if (trailing) {
return Object.assign(
empty(),
dependencies,
trailing
)
}
return dependencies
}
function hasDependencies (dependencies) {
return dependencies && (
Object.keys(dependencies).length ||
dependencies[_trailingDependencies]
)
}
function addToFlatCache (funding, dep) {
[].concat(funding || []).forEach((f) => {
const key = f.url
if (!Array.isArray(flat[key])) {
flat[key] = []
}
flat[key].push(dep)
})
}
function attachFundingInfo (target, funding, dep) {
if (funding && validFundingField(funding)) {
target.funding = retrieveFunding(funding)
if (!countOnly) {
addToFlatCache(target.funding, dep)
}
packageWithFundingCount++
}
}
function getFundingDependencies (tree) {
const deps = tree && tree.dependencies
if (!deps) return empty()
const directDepsWithFunding = Object.keys(deps).map((key) => {
const dep = deps[key]
const { name, funding, version } = dep
// avoids duplicated items within the funding tree
if (tracked(name, version)) return empty()
const fundingItem = {}
if (version) {
fundingItem.version = version
}
attachFundingInfo(fundingItem, funding, dep)
return {
dep,
fundingItem
}
})
return directDepsWithFunding.reduce((res, { dep: directDep, fundingItem }, i) => {
if (!fundingItem || fundingItem.length === 0) return res
// recurse
const transitiveDependencies = directDep.dependencies &&
Object.keys(directDep.dependencies).length > 0 &&
getFundingDependencies(directDep)
// if we're only counting items there's no need
// to add all the data to the resulting object
if (countOnly) return null
if (hasDependencies(transitiveDependencies)) {
fundingItem.dependencies = retrieveDependencies(transitiveDependencies)
}
if (fundingItem.funding && fundingItem.funding.length !== 0) {
res[directDep.name] = fundingItem
} else if (fundingItem.dependencies) {
res[_trailingDependencies] =
Object.assign(
empty(),
res[_trailingDependencies],
fundingItem.dependencies
)
}
return res
}, countOnly ? null : empty())
}
const idealTreeDependencies = getFundingDependencies(idealTree)
const result = {
length: packageWithFundingCount
}
if (!countOnly) {
result.name = idealTree.name || idealTree.path
if (idealTree && idealTree.version) {
result.version = idealTree.version
}
if (idealTree && idealTree.funding) {
result.funding = retrieveFunding(idealTree.funding)
}
result.dependencies = retrieveDependencies(idealTreeDependencies)
result[flatCacheSymbol] = flat
}
return result
}
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