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package main
import (
"code.google.com/p/go-html-transform/h5"
"code.google.com/p/go-html-transform/html/transform"
"code.google.com/p/go.net/html"
"code.google.com/p/go.tools/blog/atom"
"encoding/xml"
"fmt"
"io"
"net/http"
"os"
"strconv"
"time"
)
func getattr(attrs []html.Attribute, name string) (val string, found bool) {
for _, a := range attrs {
if a.Key == name {
val = a.Val
found = true
return
}
}
return
}
func Textify(node *html.Node) string {
switch node.Type {
case html.TextNode:
return node.Data
case html.ElementNode:
for _, att := range node.Attr {
if att.Key == "alt" {
return att.Val
}
}
fallthrough
case html.DocumentNode:
text := ""
for n := node.FirstChild; n != nil; n = n.NextSibling {
text += Textify(n)
}
return text
default:
return ""
}
}
type Tweet struct {
Content string
From string
ID string
Date time.Time
}
func ScrapeTweets(r io.Reader) ([]Tweet, error) {
t, err := transform.NewFromReader(r)
if err != nil {
return nil, fmt.Errorf("Could not scrape profile: %s", err)
}
tweets := make([]Tweet, 0)
t.Apply(func(node *html.Node) {
var tweet Tweet
tweet.From, _ = getattr(node.Attr, "data-screen-name")
tweet.ID, _ = getattr(node.Attr, "data-item-id")
time_ok := false
tree := h5.NewTree(node)
t2 := transform.New(&tree)
t2.Apply(func(node *html.Node) {
if ts, ok := getattr(node.Attr, "data-time"); ok {
if ts_int, err := strconv.ParseInt(ts, 10, 64); err == nil {
tweet.Date = time.Unix(ts_int, 0)
time_ok = true
}
}
}, "a.ProfileTweet-timestamp span")
if !time_ok {
return
}
t2.Apply(func(node *html.Node) {
tweet.Content = Textify(node)
}, ".ProfileTweet-text")
tweets = append(tweets, tweet)
}, "div.GridTimeline .ProfileTweet")
return tweets, nil
}
const titlelimit = 80
func (t Tweet) Atomify() *atom.Entry {
entry := new(atom.Entry)
entry.Title = "@" + t.From + ": " + t.Content
if len(entry.Title) > titlelimit {
entry.Title = string([]rune(entry.Title)[:titlelimit-2]) + " …"
}
url := "https://twitter.com/" + t.From + "/status/" + t.ID
entry.ID = url
entry.Link = []atom.Link{atom.Link{
Rel: "alternate",
Href: url,
}}
entry.Summary = &atom.Text{Type: "text", Body: t.Content}
entry.Content = &atom.Text{Type: "text", Body: t.Content}
entry.Author = &atom.Person{
Name: "@" + t.From,
URI: "https://twitter.com/" + t.From,
}
entry.Published = atom.Time(t.Date)
entry.Updated = atom.Time(t.Date)
return entry
}
func main() {
os.Exit(Main())
}
func Main() int {
if len(os.Args) < 2 {
fmt.Fprintln(os.Stderr, "Need one argument (twitter user name, without the '@')")
return 1
}
user := os.Args[1]
resp, err := http.Get("https://twitter.com/" + user)
if err != nil {
fmt.Fprintf(os.Stderr, "Couldn't download @%s's stream: %s\n", user, err)
return 1
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
fmt.Fprintf(os.Stderr, "Couldn't download @%s's stream: HTTP Status %d %s\n", user, resp.StatusCode, resp.Status)
return 1
}
tweets, err := ScrapeTweets(resp.Body)
if err != nil {
fmt.Fprintln(os.Stderr, err)
}
feed := atom.Feed{
Title: "Tweets from @" + user,
ID: "https://twitter.com/" + user,
Link: []atom.Link{
atom.Link{
Rel: "alternate",
Href: "http://twitter.com/" + user,
},
},
Author: &atom.Person{
Name: "@" + user,
URI: "https://twitter.com/" + user,
},
}
var latest time.Time
for _, tweet := range tweets {
feed.Entry = append(feed.Entry, tweet.Atomify())
if tweet.Date.After(latest) {
latest = tweet.Date
}
}
feed.Updated = atom.Time(latest)
enc := xml.NewEncoder(os.Stdout)
if err := enc.Encode(feed); err != nil {
fmt.Fprintf(os.Stderr, "Could not encode feed: %s\n", err)
return 1
}
return 0
}
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