// Update retrieves BTB buy prices in both USD and BTC and saves
// the prices to the database.
func (c *CoinPrice) Update() error {
usd, err := coinbaseQuote()
if err != nil {
return err
}
cryptsyBtc, err := cryptsyQuote()
if err != nil {
return err
}
conn := models.CloneConnection()
defer conn.Close()
price := &models.Price{
UsdPerBtc: usd,
Cryptsy: &models.ExchangePrice{Btc: cryptsyBtc, Usd: usd * cryptsyBtc},
GeneratedAt: time.Now().UTC().Truncate(time.Minute),
}
if err := price.SetPercentChange(conn); err != nil {
return err
}
return price.Insert(conn)
}
func getNewRedditPosts(feedUrl, source string) ([]*models.Post, error) {
conn := models.CloneConnection()
defer conn.Close()
// get the feed
feed, err := rss.Fetch(feedUrl)
if err != nil {
return []*models.Post{}, err
}
// iterate the feed and save the new items
posts := make([]*models.Post, 0)
for _, item := range feed.Items {
exists, err := models.PostExists(conn, item.ID)
if err != nil {
return []*models.Post{}, err
}
if !exists {
post := &models.Post{
Title: item.Title,
Source: source,
Url: item.Link,
UniqueId: item.ID,
PublishedAt: item.Date,
}
posts = append(posts, post)
}
}
return posts, nil
}
// Update retrieves any new stores on the bitbar subreddit.
func (r *Reddit) Update() error {
conn := models.CloneConnection()
defer conn.Close()
bitbarPosts, err := getNewRedditPosts("http://www.reddit.com/r/bitbar/.rss", "/r/bitbar")
if err != nil {
return err
}
return savePosts(bitbarPosts, conn)
}
func PricingRollupAction() error {
conn := models.CloneConnection()
defer conn.Close()
// get all prices from the last 10 minutes
baseTime := time.Now().UTC().Truncate(time.Minute * 10)
beginning := baseTime.Add(time.Minute * -10)
end := baseTime.Add(time.Minute*-1 + time.Second*59)
_, err := models.GenerateAverage(conn, beginning, end)
return err
}
func (s *postSuite) TestUpdatingReddit(c *C) {
conn := models.CloneConnection()
defer conn.Close()
replaceUrl(s.redditServer2.URL, &subredditUrl, func() {
r := &Reddit{}
r.Update()
var results []*models.Post
conn.DB.C("posts").Find(bson.M{}).All(&results)
c.Check(len(results), Equals, 2)
})
}
func (s *postSuite) TestGettingReditPosts(c *C) {
conn := models.CloneConnection()
defer conn.Close()
replaceUrl(s.redditServer1.URL, &subredditUrl, func() {
p1 := &models.Post{Title: "test title", Url: "test url", Source: "reddit", UniqueId: "http://www.reddit.com/r/worldcoin/comments/1uj486/whats_a_better_name_than_scharmbeck/"}
p1.Insert(conn)
posts, _ := getNewRedditPosts()
c.Check(len(posts), Equals, 1)
c.Check(posts[0].Title, Equals, "two worldcoins?")
})
}
func (s *coinPriceSuite) TestSavingPrices(c *C) {
replaceUrl(s.coinBaseServer.URL, &coinbaseUrl, func() {
replaceUrl(s.cryptsyServer.URL, &cryptsyUrl, func() {
conn := models.CloneConnection()
defer conn.Close()
coinPrice := &CoinPrice{}
coinPrice.Update()
var saved models.Price
conn.DB.C("prices").Find(bson.M{}).One(&saved)
c.Check(saved.UsdPerBtc, Equals, 676.58046)
c.Check(saved.Cryptsy.Btc, Equals, 0.00053275)
})
})
}
// Update retrieves BTB netork information from a blockchain api.
func (n *Network) Update() error {
hashRate, err := getHashRate()
if err != nil {
return err
}
diff, err := getDifficulty()
if err != nil {
return err
}
mined, err := getMined()
if err != nil {
return err
}
blockCount, err := getBlockCount()
if err != nil {
return err
}
blockReward, err := getBlockReward()
if err != nil {
return err
}
conn := models.CloneConnection()
defer conn.Close()
network := &models.Network{
HashRate: hashRate,
Difficulty: diff,
Mined: mined,
BlockCount: blockCount,
LatestBlockReward: blockReward,
GeneratedAt: time.Now().UTC(),
}
return network.Insert(conn)
}
func ServeAction() error {
m := martini.Classic()
m.Use(martini.Static("resources/public"))
mainView, err := mustache.ParseFile("resources/views/main.html.mustache")
if err != nil {
panic(err)
}
homeWriter := func(useBtc bool, res http.ResponseWriter) string {
conn := models.CloneConnection()
defer conn.Close()
// get the latest pricing data
price, err := models.GetLatestPrice(conn)
if err != nil {
webError(err, res)
return ""
}
// get data for the graph
averages, err := models.GetAverages(conn, 24)
if err != nil {
webError(err, res)
return ""
}
allAverages, err := addLatestPricesToAverages(conn, averages)
if err != nil {
webError(err, res)
return ""
}
var graphAverages, graphValueType string
if useBtc {
graphValueType = "BTC"
graphAverages = parseAverages(allAverages, true)
} else {
graphValueType = "USD"
graphAverages = parseAverages(allAverages, false)
}
// get the forum posts
forum, err := models.GetLatestPosts(conn, "forum", 8)
if err != nil {
webError(err, res)
return ""
}
// /r/vertcoin posts
redditBitBar, err := models.GetLatestPosts(conn, "/r/bitbar", 8)
if err != nil {
webError(err, res)
return ""
}
// get the mining information
network, err := models.GetLatestNetworkSnapshot(conn)
if err != nil {
webError(err, res)
return ""
}
// generate the HTML
valueMap := map[string]interface{}{
"redditBitBar": redditBitBar,
"forum": forum,
"averages": graphAverages,
"graphValueType": graphValueType,
"showBtcLink": !useBtc,
"showUsdLink": useBtc,
}
return mainView.Render(generateTplVars(price, network), valueMap)
}
m.Get("/", func(res http.ResponseWriter) string {
return homeWriter(false, res)
})
m.Get("/:graphValue", func(params martini.Params, res http.ResponseWriter) string {
var useBtc bool
if params["graphValue"] == "usd" {
useBtc = false
} else {
useBtc = true
}
return homeWriter(useBtc, res)
})
// returns basic information about the state of the service. If any hardcoded checks fail
// the message is returned with a 500 status. We can then use pingdom or another service
// to alert when data integrity may be off.
m.Get("/health", func(res http.ResponseWriter) string {
conn := models.CloneConnection()
defer conn.Close()
twoHoursAgo := time.Now().Add(time.Hour * -2).Unix()
// make sure the price has been updated in the last 2 hours
price, err := models.GetLatestPrice(conn)
if err != nil {
webError(errors.New("Error getting latest price"), res)
return ""
}
if price.GeneratedAt.Unix() < twoHoursAgo {
webError(errors.New("The latest price is old"), res)
return ""
}
// make sure the network has been updated in the last two hours
network, err := models.GetLatestNetworkSnapshot(conn)
if err != nil {
webError(errors.New("Error getting latest network snapshot"), res)
return ""
}
if network.GeneratedAt.Unix() < twoHoursAgo {
webError(errors.New("The latest network snapshot is old"), res)
return ""
}
return "ok"
})
log.Printf("listening on port 4001")
http.ListenAndServe(":4001", m)
return nil
}
// IndexAction is the function invoked by the index command.
func IndexAction() error {
conn := models.CloneConnection()
defer conn.Close()
return models.Index(conn)
}