Use simultaneous fetch helper.

- Introduce fetch helper for site to fetch guide simultaneously.
- Clean-up unused requires.
- Updated tv.yandex.ru cookies.

Signed-off-by: Toha <tohenk@yahoo.com>

sites/sky.com/sky.com.config.js

@@ -1,11 +1,12 @@
 const cheerio = require('cheerio')
 const dayjs = require('dayjs')
 const utc = require('dayjs/plugin/utc')
+const doFetch = require('../../scripts/core/fetch')
 const debug = require('debug')('site:sky.com')
 
 dayjs.extend(utc)
 
-const nworker = 10
+doFetch.setDebugger(debug)
 
 module.exports = {
   site: 'sky.com',
@@ -78,64 +79,3 @@ module.exports = {
     return Object.values(channels)
   }
 }
-
-async function doFetch(queues, cb) {
-  const axios = require('axios')
-  let n = Math.min(nworker, queues.length)
-  const workers = []
-  const adjustWorker = () => {
-    if (queues.length > workers.length && workers.length < nworker) {
-      let nw = Math.min(nworker, queues.length)
-      if (n < nw) {
-        n = nw
-        createWorker()
-      }
-    }
-  }
-  const createWorker = () => {
-    while (workers.length < n) {
-      startWorker()
-    }
-  }
-  const startWorker = () => {
-    const worker = () => {
-      if (queues.length) {
-        const queue = queues.shift()
-        const done = (res, headers) => {
-          if (res) {
-            cb(queue, res, headers)
-            adjustWorker()
-          }
-          worker()
-        }
-        const url = typeof queue === 'string' ? queue : queue.u
-        const params = typeof queue === 'object' && queue.params ? queue.params : {}
-        const method = typeof queue === 'object' && queue.m ? queue.m : 'get'
-        if (typeof debug === 'function') {
-          debug(`fetch %s with %s`, url, JSON.stringify(params))
-        }
-        axios[method](url, params)
-          .then(response => {
-            done(response.data, response.headers)
-          })
-          .catch(err => {
-            console.error(`Unable to fetch ${url}: ${err.message}!`)
-            done()
-          })
-      } else {
-        workers.splice(workers.indexOf(worker), 1)
-      }
-    }
-    workers.push(worker)
-    worker()
-  }
-  createWorker()
-  await new Promise(resolve => {
-    const interval = setInterval(() => {
-      if (workers.length === 0) {
-        clearInterval(interval)
-        resolve()
-      }
-    }, 500)
-  })
-}