92 lines
2.3 KiB
JavaScript
92 lines
2.3 KiB
JavaScript
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// dependencies
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var fs = require('fs')
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var http = require('http')
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var Tabletop = require('tabletop')
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var dns = require('dns')
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var hasInternet = require('hasinternet')
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var cheerio = require('cheerio')
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var filed = require('filed')
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var router = require('router')
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// globals
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var sheetData = []
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var lastFetch
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var KEY = '0Ao5u1U6KYND7dFVkcnJRNUtHWUNKamxoRGg4ZzNiT3c'
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// 0Ao5u1U6KYND7dGN5QngweVJUWE16bTRob0d2a3dCbnc has lat/long
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// cool
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// 0Ao5u1U6KYND7dGJpT3cxTGZrZS1WdWo5RnNpa1dZQmc removed lat/long
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// for geocoding testing
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// 0AvFUWxii39gXdFhqZzdTeU5DTWtOdENkQ1Y5bHdqT0E pet friends
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// ready, set, go!
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function reqHandler (req, res) {
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var route = router()
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route.get('/', serveRoot)
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route.get('/js/*', serveStatic)
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route.get('/css/*', serveStatic)
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route.get('/img/*', serveStatic)
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route(req, res)
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}
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function serveRoot(req, res) {
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hasInternet(function answer(err, internet) {
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if (internet) return freshData(req, res)
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console.log("you are offline, fetching stored data")
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localData(req, res, buildPage)
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})
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}
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// if you're offline
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function localData(req, res, cb) {
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fs.readFile(KEY + '.json', function (err, data) {
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if (err) throw err;
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var staleData = JSON.parse(data)
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cb(req, res, staleData)
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})
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}
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// if online
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function freshData(req, res) {
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function tabletopCb(data, tabletop){
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loadSheet(data, tabletop)
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buildPage(req, res, data)
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}
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var options = {key: KEY, callback: tabletopCb, simpleSheet: true}
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if (!sheetData.length || (Date.now() - lastFetch) > 6000000000000000000) {
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console.log("you are online with old data, fetching new")
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Tabletop.init(options)
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}
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else {
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console.log("you are online with fresh data")
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localData(req, res, buildPage)
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}
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}
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function loadSheet(data, tabletop) {
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sheetData = data
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lastFetch = Date.now()
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fs.writeFile(KEY +'.json', JSON.stringify(sheetData))
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}
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function buildPage(req, res, data) {
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var fileLocation = __dirname + '/index.html';
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var fileStream = fs.readFile(fileLocation, function (err, contents){
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var $ = cheerio.load(contents)
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$("head").append("<script type='text/javascript'>var gData = " + JSON.stringify(data) + "</script>");
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var completePage = $.html()
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return res.end(completePage)
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})
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}
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function serveStatic (req, res) {
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filed(__dirname + req.url).pipe(res);
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}
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var server = http.createServer(reqHandler)
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var port = process.env.PORT || 3300
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server.listen(port)
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console.log('Listening on port 3300')
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