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Viewing file:     ModuleCache.js (1.11 KB)      -rwxrwxrwx

'use strict';
exports.__esModule = true;

const log = require('debug')('eslint-module-utils:ModuleCache');

class ModuleCache {
  constructor(map) {
    this.map = map || new Map();
  }

  /**
   * returns value for returning inline
   * @param {[type]} cacheKey [description]
   * @param {[type]} result   [description]
   */
  set(cacheKey, result) {
    this.map.set(cacheKey, { result, lastSeen: process.hrtime() });
    log('setting entry for', cacheKey);
    return result;
  }

  get(cacheKey, settings) {
    if (this.map.has(cacheKey)) {
      const f = this.map.get(cacheKey);
      // check freshness
      if (process.hrtime(f.lastSeen)[0] < settings.lifetime) return f.result;
    } else log('cache miss for', cacheKey);
    // cache miss
    return undefined;
  }

}

ModuleCache.getSettings = function (settings) {
  const cacheSettings = Object.assign({
    lifetime: 30,  // seconds
  }, settings['import/cache']);

  // parse infinity
  if (cacheSettings.lifetime === '∞' || cacheSettings.lifetime === 'Infinity') {
    cacheSettings.lifetime = Infinity;
  }

  return cacheSettings;
};

exports.default = ModuleCache;