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'use strict'
const parallel = require('async/parallel')
const express = require('express')
const fs = require('fs')
const mongoose = require('mongoose')
const path = require('path')
const constants = require('../initializers/constants')
const middlewares = require('../middlewares')
const validators = middlewares.validators
const validatorsVideos = validators.videos
const Video = mongoose.model('Video')
const router = express.Router()
const opengraphComment = '<!-- opengraph tags -->'
const embedPath = path.join(__dirname, '../../client/dist/standalone/videos/embed.html')
const indexPath = path.join(__dirname, '../../client/dist/index.html')
// Special route that add OpenGraph tags
// Do not use a template engine for a so little thing
router.use('/videos/watch/:id', validatorsVideos.videosGet, generateWatchHtmlPage)
router.use('/videos/embed', function (req, res, next) {
res.sendFile(embedPath)
})
// ---------------------------------------------------------------------------
module.exports = router
// ---------------------------------------------------------------------------
function addOpenGraphTags (htmlStringPage, video) {
const thumbnailUrl = constants.CONFIG.WEBSERVER.URL + video.thumbnailPath
const videoUrl = constants.CONFIG.WEBSERVER.URL + '/videos/watch/'
const metaTags = {
'og:type': 'video',
'og:title': video.name,
'og:image': thumbnailUrl,
'og:url': videoUrl,
'og:description': video.description,
'name': video.name,
'description': video.description,
'image': thumbnailUrl,
'twitter:card': 'summary_large_image',
'twitter:site': '@Chocobozzz',
'twitter:title': video.name,
'twitter:description': video.description,
'twitter:image': thumbnailUrl
}
let tagsString = ''
Object.keys(metaTags).forEach(function (tagName) {
const tagValue = metaTags[tagName]
tagsString += '<meta property="' + tagName + '" content="' + tagValue + '" />'
})
return htmlStringPage.replace(opengraphComment, tagsString)
}
function generateWatchHtmlPage (req, res, next) {
parallel({
file: function (callback) {
fs.readFile(indexPath, callback)
},
video: function (callback) {
Video.load(req.params.id, callback)
}
}, function (err, results) {
if (err) return next(err)
const html = results.file.toString()
const video = results.video.toFormatedJSON()
const htmlStringPageWithTags = addOpenGraphTags(html, video)
res.set('Content-Type', 'text/html; charset=UTF-8').send(htmlStringPageWithTags)
})
}
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