How to Build a Twitter Bot with IPFS Cluster

$ ipfs version
ipfs version <VERSION_NUMBER>

$ ipfs help
USAGE:

ipfs - Global p2p merkle-dag filesystem.
...

$ ipfs init

initializing IPFS node at /home/vasa/.ipfs
generating 2048-bit RSA keypair...done
peer identity: Qmcpo2iLBikrdf1d6QU6vXuNb6P7hwrbNPW9kLAH8eG67z
to get started, enter:

ipfs cat /ipfs/QmYwAPJzv5CZsnA625s3Xf2nemtYgPpHdWEz79ojWnPbdG/readme

ipfs-cluster-service init

{
...
"api": {
    "ipfsproxy": {
        ...
    },
    "restapi": {
      "libp2p_listen_multiaddress": "/ip4/127.0.0.1/tcp/9696",
      "private_key": "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",
      "id": "QmcrQZ6RJdpYuGvZqD5QEHAv6qX4BrQLJLQPQUrTrzdcgm",
      ...
      }
  }
  ...
} 

//To pin a CID with a name/label to IPFS Cluster Network
@botHandle !pin <cid> <name>

//To unpin a CID from IPFS Cluster Network
@botHandle !unpin <cid>

//To add a file(via URL) to IPFS Cluster Network
@botHandle !add <url-to-single-file>

//To check out what the bot can do
@botHandle !help

//Adding photos, memes, videos to IPFS Cluster Network
Tweet to @botHandle attaching photos, memes or videos 

$ git clone --single-branch --branch boilerplate https://github.com/simpleaswater/twitter-pinbot

{
  "twitter_name": "@botHandle",
  "twitter_id": "@botHandle",
  "consumer_key": "API key",
  "consumer_secret": "API secret key",
  "access_key": "Access token",
  "access_secret": "Access token secret",
  "cluster_peer_addr": "cluster peer multiaddress",
  "cluster_username": "",
  "cluster_password": ""
}

/ip4/127.0.0.1/tcp/9696/ipfs/QmcrQZ6RJdpYuGvZqD5QEHAv6qX4BrQLJLQPQUrTrzdcgm

package main

import (
    "regexp"
)

// ConfigFile is the path of the default configuration file
var ConfigFile = "config.json"

// Gateway
var IPFSGateway = "https://ipfs.io"

const twittercom = "twitter.com"

type Action string

// Variables containing the different available actions
var (
    // (spaces)(action)whitespaces(arguments)
    actionRegexp = regexp.MustCompile(`^\s*([[:graph:]]+)\s+(.+)`)
    // (cid)whitespaces(name with whitespaces). [:graph:] does not
    // match line breaks or spaces.
    pinRegexp          = regexp.MustCompile(`([[:graph:]]+)\s+([[:graph:]\s]+)`)
    PinAction   Action = "!pin"
    UnpinAction Action = "!unpin"
    AddAction   Action = "!add"
    HelpAction  Action = "!help"
)

func main() {
    //Let's code ☕
}

// Config is the configuration format for the Twitter Pinbot
type Config struct {
    TwitterID       string `json:"twitter_id"`
    TwitterName     string `json:"twitter_name"`
    AccessKey       string `json:"access_key"`
    AccessSecret    string `json:"access_secret"`
    ConsumerKey     string `json:"consumer_key"`
    ConsumerSecret  string `json:"consumer_secret"`
    ClusterPeerAddr string `json:"cluster_peer_addr"`
    ClusterUsername string `json:"cluster_username"`
    ClusterPassword string `json:"cluster_password"`
}

// Function to read JSON config file
func readConfig(path string) *Config {
    cfg := &Config{}
    cfgFile, err := ioutil.ReadFile(path)
    if err != nil {
        log.Fatal(err)
    }
    err = json.Unmarshal(cfgFile, &cfg)
    if err != nil {
        log.Fatal(err)
    }
    return cfg
}

// Bot is a twitter bot which reads a user's timeline
// and performs actions on IPFS Cluster if the tweets
// match, i.e. a tweet with: "@botHandle !pin <cid> <name>"
// will pin something. The users with pin permissions are
// those who follow the bot. Retweets by users who follow
// the bot should also work. The bot will answer
// the tweet with a result.
type Bot struct {
    ctx    context.Context
    cancel context.CancelFunc

    name          string
    id            string
    twClient      *twitter.Client
    clusterClient client.Client

    followedBy sync.Map

    die chan struct{}
}

import (
    "github.com/dghubble/go-twitter/twitter"
    "github.com/ipfs/ipfs-cluster/api/rest/client"
)

import (
    "github.com/multiformats/go-multiaddr"
    "github.com/dghubble/oauth1"
)

// New creates a new Bot with the Config.
func New(cfg *Config) (*Bot, error) {
    ctx, cancel := context.WithCancel(context.Background())

    // Creating Twitter client
    ocfg := oauth1.NewConfig(cfg.ConsumerKey, cfg.ConsumerSecret)
    token := oauth1.NewToken(cfg.AccessKey, cfg.AccessSecret)
    httpClient := ocfg.Client(ctx, token)
    twClient := twitter.NewClient(httpClient)

    // Creating IPFS Cluster client
    peerAddr, err := multiaddr.NewMultiaddr(cfg.ClusterPeerAddr)
    if err != nil {
        cancel()
        return nil, err
    }
    clusterClient, err := client.NewDefaultClient(&client.Config{
        APIAddr:  peerAddr,
        Username: cfg.ClusterUsername,
        Password: cfg.ClusterPassword,
        LogLevel: "info",
    })

    if err != nil {
        cancel()
        return nil, err
    }

    //Creating Bot Object
    bot := &Bot{
        ctx:           ctx,
        cancel:        cancel,
        twClient:      twClient,
        clusterClient: clusterClient,
        name:          cfg.TwitterName,
        id:            cfg.TwitterID,
        die:           make(chan struct{}, 1),
    }

    bot.fetchFollowers()
    go bot.watchFollowers()
    go bot.watchTweets()
    return bot, nil
}

// Kill destroys this bot.
func (b *Bot) Kill() {
    b.cancel()
}

// Name returns the twitter handle used by the bot
func (b *Bot) Name() string {
    return b.name
}

// ID returns the twitter user ID used by the bot
func (b *Bot) ID() string {
    return b.id
}

//Fetching the bot Followers
func (b *Bot) fetchFollowers() {
    var nextCursor int64 = -1
    includeEntities := false
    for nextCursor != 0 {
        //Getting the List of bot followers
        followers, _, err := b.twClient.Followers.List(
            &twitter.FollowerListParams{
                Count:               200, //Number of bot followers we want in our list
                IncludeUserEntities: &includeEntities,
            })

        if err != nil {
            log.Println(err)
        }

        //Parsing and Storing the ID(s) of the bot followers
        for _, u := range followers.Users {
            _, old := b.followedBy.LoadOrStore(u.ID, struct{}{})
            if !old {
                //Printing the bot followers ScreenName
                log.Println("Friend: ", u.ScreenName)
            }
        }
        nextCursor = followers.NextCursor
        time.Sleep(2 * time.Second)
    }
}

//Watching bot followers every 60 secs.
//This checks the accounts following
//the bot in every 60 seconds, so that
//any new follower can be added to the
//followers list.
func (b *Bot) watchFollowers() {
    for {
        time.Sleep(60 * time.Second)
        select {
        case <-b.ctx.Done():
        default:
            b.fetchFollowers()
        }
    }
}

//Function to watch tweets that mentions the bot
func (b *Bot) watchTweets() {
    log.Println("watching tweets")

    /*
        Filter Streams return Tweets that match one
        or more filtering predicates such as Track,
        Follow, and Locations.

        Here we are filtering our tweets with
        "!pin", "!unpin", "!add", "!help" or "<bot-name>" strings
        in tweet body.
    */
    params := &twitter.StreamFilterParams{
        Track: []string{
            PinAction.String(),
            UnpinAction.String(),
            HelpAction.String(),
            AddAction.String(),
            b.Name(),
        },
        StallWarnings: twitter.Bool(true),
    }

    stream, err := b.twClient.Streams.Filter(params)
    if err != nil {
        log.Println(err)
    }

    /*
        Receiving messages of type interface{} isn't very nice,
        it means you'll have to type switch and probably filter
        out message types you don't care about.

        For this,we use Demux, which receives messages and type
        switches them to call functions with typed messages.

        For example, say we're only interested in Tweets.
    */

    demux := twitter.NewSwitchDemux()
    demux.Tweet = func(t *twitter.Tweet) {
        //Processing the tweets
        b.processTweet(t, t)
    }

    //Constantly watching for new filtered tweets
    for {
        select {
        case <-b.ctx.Done():
            return
        case msg := <-stream.Messages:
            //"Handle(msg)" determines the type of a message
            //and calls the corresponding receiver
            //function with the typed message.
            go demux.Handle(msg)
        }
    }
}

func (a Action) String() string {
    return string(a)
}

import (
    "github.com/ipfs/go-cid"
    "github.com/ipfs/ipfs-cluster/api"
)

//Process the filetered tweets and handle the tweets according to the
//desired action.
func (b *Bot) processTweet(tweet *twitter.Tweet, srcTweet *twitter.Tweet) {
    if tweet == nil {
        return
    }

    if srcTweet == nil {
        srcTweet = tweet
    }

    // Skip processing our own tweets (written by us)
    // and quotes or retweets we've made (origUser is us)
    // (avoid potential loops)
    if tweet.User.IDStr == b.ID() || srcTweet.User.IDStr == b.ID() {
        return
    }

    action, arguments, urls, err := b.parseTweet(tweet)
    if err != nil {
        b.tweet(err.Error(), tweet, srcTweet, false)
        return
    }

    log.Printf("Parsed: %s, %s, %s\n", action, arguments, urls)

    _, ok := b.followedBy.Load(srcTweet.User.ID)
    if !ok && action.Valid() {
        log.Println("Error: NoFollow")
        b.tweet("Follow me, and try again.", tweet, srcTweet, false)
        return
    }
    if !ok {
        return
    }

    // Process actions
    switch action {
    case PinAction:
        //Pin the Tweet to the IPFS Cluster network
        b.pin(arguments, tweet, srcTweet)
    case UnpinAction:
        //UnPin the Tweet to the IPFS Cluster network
        b.unpin(arguments, tweet, srcTweet)
    case AddAction:
        ////Add the Tweet to the IPFS Cluster network
        b.add(arguments, tweet, srcTweet)
    case HelpAction:
        //Tweet a "help tweet" that demostrates how to use the bot
        b.tweetHelp(tweet, srcTweet)
    default:
        //Need to handle default tweets by adding the assets
        log.Println("no handled action for this tweet")
    }

    // Add any media urls
    if len(urls) > 0 {
        log.Println("adding media: ", urls)
        out := make(chan *api.AddedOutput, 1)
        go func() {
            cids := []cid.Cid{}
            for added := range out {
                log.Printf("added %s\n", added.Cid)
                cids = append(cids, added.Cid)
            }
            if len(cids) > 0 {
                b.tweetAdded(cids, tweet, srcTweet)
            }
        }()
        params := api.DefaultAddParams()
        params.Wrap = true
        params.Name = "Tweet-" + tweet.IDStr
        err := b.clusterClient.Add(context.Background(), urls, params, out)
        if err != nil {
            log.Println(err)
        }
    }

    // If the tweet has retweets, process them as if they were
    // from this user.
    retweets := []*twitter.Tweet{tweet.QuotedStatus, tweet.RetweetedStatus}
    for _, rt := range retweets {
        b.processTweet(rt, srcTweet)
    }
}

func (a Action) Valid() bool {
    switch a {
    case PinAction, UnpinAction, AddAction, HelpAction:
        return true
    }
    return false
}

// parseTweet returns Action, arguments, media urls, and error
func (b *Bot) parseTweet(tweet *twitter.Tweet) (Action, string, []string, error) {
	// Extended tweet? let's use the entities from the extended tweet then.
	if tweet.ExtendedTweet != nil {
		tweet.Entities = tweet.ExtendedTweet.Entities
		tweet.ExtendedEntities = tweet.ExtendedTweet.ExtendedEntities
		tweet.FullText = tweet.ExtendedTweet.FullText

	}
	text := tweet.FullText
	if text == "" {
		text = tweet.Text
	}

	log.Println("Parsing:", text)

	// remote our username if they started with it
	text = strings.TrimPrefix(text, b.name)
	var action Action
	var arguments string

	if text == " "+string(HelpAction) {
		return HelpAction, "", []string{}, nil
	}

	// match to see if any action
	matches := actionRegexp.FindAllStringSubmatch(text, -1)
	if len(matches) > 0 {
		firstMatch := matches[0]
		action = Action(firstMatch[1]) // first group match
		arguments = firstMatch[2]      // second group match
	}

	urls := extractMediaURLs(tweet)
	return action, arguments, urls, nil
}

//Extracting MediaURLs from tweets
func extractMediaURLs(tweet *twitter.Tweet) []string {
    var urls []string

    // Grab any media entities from the tweet
    for _, m := range media(tweet.ExtendedEntities) {
        urls = append(urls, extractMediaURL(&m))
    }

    if len(urls) == 0 {
        // If no extended entitites, try with traditional.
        for _, m := range media(tweet.Entities) {
            urls = append(urls, extractMediaURL(&m))
        }
    }
    return urls
}

// takes *Entities or *MediaEntities
func media(ent interface{}) []twitter.MediaEntity {
    if ent == nil {
        return nil
    }

    switch ent.(type) {
    case *twitter.Entities:
        e := ent.(*twitter.Entities)
        if e != nil {
            return e.Media
        }
    case *twitter.ExtendedEntity:
        e := ent.(*twitter.ExtendedEntity)
        if e != nil {
            return e.Media
        }
    }
    return nil
}

type byBitrate []twitter.VideoVariant

func (vv byBitrate) Len() int           { return len(vv) }
func (vv byBitrate) Swap(i, j int)      { vv[i], vv[j] = vv[j], vv[i] }
func (vv byBitrate) Less(i, j int) bool { return vv[i].Bitrate < vv[j].Bitrate }

//Extracting the highest bitrate MediaURL from MediaEntity
func extractMediaURL(me *twitter.MediaEntity) string {
    switch me.Type {
    case "video", "animated_gif":
        variants := me.VideoInfo.Variants
        sort.Sort(byBitrate(variants))
        // pick video with highest bitrate
        last := variants[len(variants)-1]
        return last.URL
    default:
        return me.MediaURL
    }
}

//Function to pin a CID to IPFS Cluster
func (b *Bot) pin(args string, tweet, srcTweet *twitter.Tweet) {
    log.Println("pin with ", args)
    pinUsage := fmt.Sprintf("Usage: '%s <cid> <name>'", PinAction)

    matches := pinRegexp.FindAllStringSubmatch(args, -1)
    if len(matches) == 0 {
        b.tweet(pinUsage, srcTweet, nil, false)
        return
    }

    firstMatch := matches[0]
    cidStr := firstMatch[1]
    name := firstMatch[2]
    c, err := cid.Decode(cidStr)
    if err != nil {
        b.tweet(pinUsage+". Make sure your CID is valid.", tweet, srcTweet, false)
        return
    }

    _, err = b.clusterClient.Pin(context.Background(), c, api.PinOptions{Name: name})
    if err != nil {
        log.Println(err)
        b.tweet("An error happened pinning. I will re-start myself. Please retry in a bit.", srcTweet, nil, false)
        b.die <- struct{}{}
        return
    }
    waitParams := client.StatusFilterParams{
        Cid:       c,
        Local:     false,
        Target:    api.TrackerStatusPinned,
        CheckFreq: 10 * time.Second,
    }
    ctx, cancel := context.WithTimeout(b.ctx, 10*time.Minute)
    defer cancel()
    _, err = client.WaitFor(ctx, b.clusterClient, waitParams)
    if err != nil {
        log.Println(err)
        b.tweet("IPFS Cluster has been pinning this for 10 mins. This is normal for big files. Otherwise, make sure there are providers for it. Don't worry, Cluster will keep at it for a week before giving up.", srcTweet, nil, false)
        return
    }

    b.tweet(fmt.Sprintf("Pinned! Check it out at %s/ipfs/%s", IPFSGateway, cidStr), tweet, srcTweet, true)
}

// Function to unpin a CID from IPFS Cluster network
func (b *Bot) unpin(args string, tweet, srcTweet *twitter.Tweet) {
    log.Println("unpin with ", args)
    unpinUsage := fmt.Sprintf("Usage: '%s <cid>'", UnpinAction)

    c, err := cid.Decode(args)
    if err != nil {
        b.tweet(unpinUsage+". Make sure your CID is valid.", tweet, srcTweet, false)
        return
    }

    _, err = b.clusterClient.Unpin(context.Background(), c)
    if err != nil && !strings.Contains(err.Error(), "uncommited to state") {
        log.Println(err)
        b.tweet("An error happened unpinning. I will re-start myself. Please retry in a bit.", srcTweet, nil, false)
        b.die <- struct{}{}
        return
    }
    waitParams := client.StatusFilterParams{
        Cid:       c,
        Local:     false,
        Target:    api.TrackerStatusUnpinned,
        CheckFreq: 10 * time.Second,
    }
    ctx, cancel := context.WithTimeout(b.ctx, time.Minute)
    defer cancel()
    _, err = client.WaitFor(ctx, b.clusterClient, waitParams)
    if err != nil {
        log.Println(err)
        b.tweet("IPFS Cluster did not manage to unpin the item, but it's trying...", srcTweet, nil, false)
        return
    }

    b.tweet(fmt.Sprintf("Unpinned %s! :'(", args), tweet, srcTweet, false)
}

//Function to add URL to IPFS Cluster network
func (b *Bot) add(arg string, tweet, srcTweet *twitter.Tweet) {
    log.Println("add with ", arg)
    addUsage := fmt.Sprintf("Usage: '%s <http-or-https-url>'")
    url, err := url.Parse(arg)
    if err != nil {
        b.tweet(addUsage+". Make sure you gave a valid url!", srcTweet, nil, false)
        return
    }
    if url.Scheme != "http" && url.Scheme != "https" {
        b.tweet(addUsage+". Not an HTTP(s) url!", srcTweet, nil, false)
        return
    }

    if url.Host == "localhost" || url.Host == "127.0.0.1" || url.Host == "::1" {
        b.tweet("ehem ehem...", srcTweet, nil, false)
        return
    }

    out := make(chan *api.AddedOutput, 1)
    go func() {
        cids := []cid.Cid{}
        for added := range out {
            cids = append(cids, added.Cid)
        }
        if len(cids) > 0 {
            b.tweetAdded(cids, tweet, srcTweet)
        }
    }()

    params := api.DefaultAddParams()
    params.Wrap = true
    params.Name = "Tweet-" + tweet.IDStr
    log.Println([]string{arg})
    err = b.clusterClient.Add(context.Background(), []string{arg}, params, out)
    if err != nil {
        log.Println(err)
        b.tweet("An error happened adding. I will re-start myself. Please retry in a bit.", srcTweet, nil, false)
        b.die <- struct{}{}
        return
    }
}

//Function for Tweeting for the Add Action
func (b *Bot) tweetAdded(cids []cid.Cid, tweet, srcTweet *twitter.Tweet) {
    msg := "Just added this to #IPFS Cluster!\n\n"
    for i, c := range cids {
        if i != len(cids)-1 {
            msg += fmt.Sprintf("• File: %s/ipfs/%s\n", IPFSGateway, c)
        } else { // last
            msg += fmt.Sprintf("• Folder-wrap: %s/ipfs/%s\n", IPFSGateway, c)
        }
    }
    b.tweet(msg, tweet, srcTweet, true)
}

//Function for Tweeting for the Help Action
func (b *Bot) tweetHelp(tweet, srcTweet *twitter.Tweet) {
    help := fmt.Sprintf(`Hi! Here's what I can do:

!pin <cid> <name>
!unpin <cid>
!add <url-to-single-file>
!help

You can always prepend these commands mentioning me (%s).

Happy pinning!
`, b.name)
    b.tweet(help, srcTweet, nil, false)
}

// tweets sends a tweet quoting or replying to the given tweets.
// srcTweet might be nil.
// Otherwise it just posts the message.
func (b *Bot) tweet(msg string, inReplyTo, srcTweet *twitter.Tweet, quote bool) {
    tweetMsg := ""
    params := &twitter.StatusUpdateParams{}
    sameTweets := false

    if inReplyTo == nil {
        tweetMsg = msg
        goto TWEET
    }

    sameTweets = srcTweet == nil || inReplyTo.ID == srcTweet.ID
    params.InReplyToStatusID = inReplyTo.ID

    switch {
    case sameTweets && !quote:
        // @user msg (reply thread)
        tweetMsg = fmt.Sprintf("@%s %s", inReplyTo.User.ScreenName, msg)
    case sameTweets && quote:
        // @user msg <permalink> (quote RT)
        tweetMsg = fmt.Sprintf(".@%s %s %s",
            inReplyTo.User.ScreenName,
            msg,
            permaLink(inReplyTo),
        )
    case !sameTweets && !quote:
        // @user @srcUser msg (reply thread)
        tweetMsg = fmt.Sprintf("@%s @%s %s",
            inReplyTo.User.ScreenName,
            srcTweet.User.ScreenName,
            msg,
        )
    case !sameTweets && quote:
        // @srcuser <replyPermalink> (quote RT mentioning src user)
        tweetMsg = fmt.Sprintf(".@%s %s %s",
            srcTweet.User.ScreenName,
            msg,
            permaLink(inReplyTo),
        )

    }

TWEET:
    log.Println("tweeting:", tweetMsg)
    newTweet, _, err := b.twClient.Statuses.Update(tweetMsg, params)
    if err != nil {
        log.Println(err)
        return
    }
    _ = newTweet
    // if quote { // then retweet my tweet after a minute
    //  go func() {
    //      time.Sleep(time.Minute)
    //      _, _, err := b.twClient.Statuses.Retweet(newTweet.ID, nil)
    //      log.Println("retweeted: ", tweetMsg)
    //      if err != nil {
    //          log.Println(err)
    //          return
    //      }
    //  }()
    // }
    return
}

func permaLink(tweet *twitter.Tweet) string {
    return fmt.Sprintf("https://%s/%s/status/%s", twittercom, tweet.User.ScreenName, tweet.IDStr)
}

func main() {
    //Fetching the optional path from command line
    path := flag.String("config", ConfigFile, "path to config file")
    flag.Parse()

    //Reading the config file
    cfg := readConfig(*path)

    //Creating a new bot
    bot, err := New(cfg)
    if err != nil {
        log.Fatal(err)
    }
    log.Println("Bot created:", bot.Name(), bot.ID())

    // Wait for SIGINT and SIGTERM (HIT CTRL-C)
    ch := make(chan os.Signal)
    signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
    select {
    case sig := <-ch:
        log.Println(sig)
    case <-bot.die:
    }

    bot.Kill()
}