From e96f1406edff76d71da759f619185303a424fcb9 Mon Sep 17 00:00:00 2001
From: Aleksandr Statciuk <free.arhey@gmail.com>
Date: Sun, 1 Aug 2021 06:52:03 +0300
Subject: [PATCH] Create detect-resolution.js

---
 scripts/detect-resolution.js | 130 +++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 scripts/detect-resolution.js

diff --git a/scripts/detect-resolution.js b/scripts/detect-resolution.js
new file mode 100644
index 000000000..19c2a7d90
--- /dev/null
+++ b/scripts/detect-resolution.js
@@ -0,0 +1,130 @@
+const { program } = require('commander')
+const parser = require('./parser')
+const utils = require('./utils')
+const axios = require('axios')
+const ProgressBar = require('progress')
+const https = require('https')
+
+program
+  .usage('[OPTIONS]...')
+  .option('-d, --debug', 'Debug mode')
+  .option('-c, --country <country>', 'Comma-separated list of country codes', '')
+  .option('-e, --exclude <exclude>', 'Comma-separated list of country codes to be excluded', '')
+  .option('--delay <delay>', 'Delay between parser requests', 1000)
+  .option('--timeout <timeout>', 'Set timeout for each request', 5000)
+  .parse(process.argv)
+
+const config = program.opts()
+
+const instance = axios.create({
+  timeout: config.timeout,
+  maxContentLength: 200000,
+  httpsAgent: new https.Agent({
+    rejectUnauthorized: false
+  })
+})
+
+async function main() {
+  utils.log('Starting...\n')
+  console.time('Done in')
+
+  const playlists = parseIndex()
+  for (const playlist of playlists) {
+    await loadPlaylist(playlist.url).then(detectResolution).then(savePlaylist)
+  }
+
+  finish()
+}
+
+function parseIndex() {
+  utils.log(`Parsing 'index.m3u'...\n`)
+  let playlists = parser.parseIndex()
+  playlists = utils
+    .filterPlaylists(playlists, config.country, config.exclude)
+    .filter(i => i.url !== 'channels/unsorted.m3u')
+
+  return playlists
+}
+
+async function loadPlaylist(url) {
+  return parser.parsePlaylist(url)
+}
+
+async function detectResolution(playlist) {
+  const bar = new ProgressBar(`Processing '${playlist.url}': [:bar] :current/:total (:percent) `, {
+    total: playlist.channels.length
+  })
+  const results = []
+  for (const channel of playlist.channels) {
+    bar.tick()
+    if (!channel.resolution.height) {
+      const CancelToken = axios.CancelToken
+      const source = CancelToken.source()
+      const timeout = setTimeout(() => {
+        source.cancel()
+      }, config.timeout)
+
+      const response = await instance
+        .get(channel.url, { cancelToken: source.token })
+        .then(res => {
+          clearTimeout(timeout)
+
+          return res
+        })
+        .then(utils.sleep(config.delay))
+        .catch(err => {
+          clearTimeout(timeout)
+        })
+
+      if (response && response.status === 200) {
+        if (/^#EXTM3U/.test(response.data)) {
+          const resolution = parseResolution(response.data)
+          if (resolution) {
+            channel.resolution = resolution
+          }
+        }
+      }
+    }
+
+    results.push(channel)
+  }
+
+  playlist.channels = results
+
+  return playlist
+}
+
+function parseResolution(string) {
+  const regex = /RESOLUTION=(\d+)x(\d+)/gm
+  const match = string.matchAll(regex)
+  const arr = Array.from(match).map(m => ({
+    width: parseInt(m[1]),
+    height: parseInt(m[2])
+  }))
+
+  return arr.length
+    ? arr.reduce(function (prev, current) {
+        return prev.height > current.height ? prev : current
+      })
+    : undefined
+}
+
+async function savePlaylist(playlist) {
+  const original = utils.readFile(playlist.url)
+  const output = playlist.toString()
+
+  if (original === output) {
+    return false
+  } else {
+    utils.createFile(playlist.url, output)
+    utils.log(`Playlist '${playlist.url}' has been updated\n`)
+  }
+
+  return true
+}
+
+function finish() {
+  console.timeEnd('Done in')
+}
+
+main()