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1// a class to manage an inventory and set of indexes of a set of objects based on specific fields.2const { hasOwnProperty } = Object.prototype3const debug = require('./debug.js')4 5const keys = ['name', 'license', 'funding', 'realpath', 'packageName']6class Inventory extends Map {7  #index8 9  constructor () {10    super()11    this.#index = new Map()12    for (const key of keys) {13      this.#index.set(key, new Map())14    }15  }16 17  // XXX where is this used?18  get primaryKey () {19    return 'location'20  }21 22  // XXX where is this used?23  get indexes () {24    return [...keys]25  }26 27  * filter (fn) {28    for (const node of this.values()) {29      if (fn(node)) {30        yield node31      }32    }33  }34 35  add (node) {36    const root = super.get('')37    if (root && node.root !== root && node.root !== root.root) {38      debug(() => {39        throw Object.assign(new Error('adding external node to inventory'), {40          root: root.path,41          node: node.path,42          nodeRoot: node.root.path,43        })44      })45      return46    }47 48    const current = super.get(node.location)49    if (current) {50      if (current === node) {51        return52      }53      this.delete(current)54    }55    super.set(node.location, node)56    for (const [key, map] of this.#index.entries()) {57      let val58      if (hasOwnProperty.call(node, key)) {59        // if the node has the value, use it even if it's false60        val = node[key]61      } else if (key === 'license' && node.package) {62        // handling for the outdated "licenses" array, just pick the first one63        // also support the alternative spelling "licence"64        if (node.package.license) {65          val = node.package.license66        } else if (node.package.licence) {67          val = node.package.licence68        } else if (Array.isArray(node.package.licenses)) {69          val = node.package.licenses[0]70        } else if (Array.isArray(node.package.licences)) {71          val = node.package.licences[0]72        }73      } else if (node[key]) {74        val = node[key]75      } else {76        val = node.package?.[key]77      }78      if (val && typeof val === 'object') {79        // We currently only use license and funding80        /* istanbul ignore next - not used */81        if (key === 'license') {82          val = val.type83        } else if (key === 'funding') {84          val = val.url85        }86      }87      if (!map.has(val)) {88        map.set(val, new Set())89      }90      map.get(val).add(node)91    }92  }93 94  delete (node) {95    if (!this.has(node)) {96      return97    }98 99    super.delete(node.location)100    for (const [key, map] of this.#index.entries()) {101      let val102      if (node[key] !== undefined) {103        val = node[key]104      } else {105        val = node.package?.[key]106      }107      const set = map.get(val)108      if (set) {109        set.delete(node)110        if (set.size === 0) {111          map.delete(node[key])112        }113      }114    }115  }116 117  query (key, val) {118    const map = this.#index.get(key)119    if (arguments.length === 2) {120      if (map.has(val)) {121        return map.get(val)122      }123      return new Set()124    }125    return map.keys()126  }127 128  has (node) {129    return super.get(node.location) === node130  }131 132  set () {133    throw new Error('direct set() not supported, use inventory.add(node)')134  }135}136 137module.exports = Inventory138