list_unfollowed_friends.go

package main

import (
	"fmt"
	"log"
	"net/url"
	"os"

	"github.com/ChimeraCoder/anaconda"
	"github.com/deckarep/golang-set"
	"github.com/joho/godotenv"
)

func check(s *string, dict map[string]string, key string) bool {
	str, ok := dict[key]
	if ok {
		*s = str
	}
	return ok
}

func main() {
	env, err := godotenv.Read(os.Getenv("HOME") + "/.env")
	if err != nil {
		log.Fatal(err)
	}
	var ck, cs, at, as string
	if !check(&ck, env, "CONSUMER_KEY") || !check(&cs, env, "CONSUMER_SECRET") ||
		!check(&at, env, "ACCESS_TOKEN") || !check(&as, env, "ACCESS_TOKEN_SECRET") {
		log.Fatal("Cannot construct twitter api object")
	}
	anaconda.SetConsumerKey(ck)
	anaconda.SetConsumerSecret(cs)
	api := anaconda.NewTwitterApi(at, as)

	v := url.Values{}
	v.Set("count", "5000")
	c, err := api.GetFollowersIds(v)
	if err != nil {
		log.Fatal(err)
	}
	followers := mapset.NewSet()
	for _, u := range c.Ids {
		followers.Add(u)
	}

	c, err = api.GetFriendsIds(v)
	if err != nil {
		log.Fatal(err)
	}
	friends := mapset.NewSet()
	for _, u := range c.Ids {
		friends.Add(u)
	}

	var diff []int64
	for d := range friends.Difference(followers).Iter() {
		diff = append(diff, d.(int64))
	}

	var users []anaconda.User
	for len(diff) > 0 {
		if us, err := api.GetUsersLookupByIds(diff[:100], url.Values{}); err == nil {
			users = append(users, us...)
		} else {
			log.Println("Skip")
		}
		if len(diff) <= 100 {
			break
		}
		diff = diff[100:]
	}
	for _, u := range users {
		fmt.Printf("%s\n", u.ScreenName)
	}
}