Merge pull request #715 from Ameobea/twitterstats

Twitterstats

app/widget_maker.go

@@ -55,6 +55,7 @@ import (
 	"github.com/wtfutil/wtf/modules/travisci"
 	"github.com/wtfutil/wtf/modules/trello"
 	"github.com/wtfutil/wtf/modules/twitter"
+	"github.com/wtfutil/wtf/modules/twitterstats"
 	"github.com/wtfutil/wtf/modules/unknown"
 	"github.com/wtfutil/wtf/modules/victorops"
 	"github.com/wtfutil/wtf/modules/weatherservices/arpansagovau"
@@ -243,6 +244,9 @@ func MakeWidget(
 	case "twitter":
 		settings := twitter.NewSettingsFromYAML(moduleName, moduleConfig, config)
 		widget = twitter.NewWidget(app, pages, settings)
+	case "twitterstats":
+		settings := twitterstats.NewSettingsFromYAML(moduleName, moduleConfig, config)
+		widget = twitterstats.NewWidget(app, pages, settings)
 	case "victorops":
 		settings := victorops.NewSettingsFromYAML(moduleName, moduleConfig, config)
 		widget = victorops.NewWidget(app, settings)

modules/twitter/client.go

@@ -1,9 +1,14 @@
 package twitter
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
+	"net/http"
 	"strconv"
+
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/clientcredentials"
 )
 
 /* NOTE: Currently single application ONLY
@@ -13,18 +18,36 @@ import (
 // Client represents the data required to connect to the Twitter API
 type Client struct {
 	apiBase    string
-	bearerToken string
 	count      int
 	screenName string
+	httpClient *http.Client
 }
 
 // NewClient creates and returns a new Twitter client
 func NewClient(settings *Settings) *Client {
+	var httpClient *http.Client
+	// If a bearer token is supplied, use that directly.  Otherwise, let the Oauth client fetch a token
+	// using the consumer key and secret.
+	if settings.bearerToken == "" {
+		conf := &clientcredentials.Config{
+			ClientID:     settings.consumerKey,
+			ClientSecret: settings.consumerSecret,
+			TokenURL:     "https://api.twitter.com/oauth2/token",
+		}
+		httpClient = conf.Client(oauth2.NoContext)
+	} else {
+		ctx := context.Background()
+		httpClient = oauth2.NewClient(ctx, oauth2.StaticTokenSource(&oauth2.Token{
+			AccessToken: settings.bearerToken,
+			TokenType:   "Bearer",
+		}))
+	}
+
 	client := Client{
 		apiBase:    "https://api.twitter.com/1.1/",
 		count:      settings.count,
 		screenName: "",
-		bearerToken: settings.bearerToken,
+		httpClient: httpClient,
 	}
 
 	return &client
@@ -53,7 +76,7 @@ func (client *Client) tweets() (tweets []Tweet, err error) {
 		strconv.Itoa(client.count),
 	)
 
-	data, err := Request(client.bearerToken, apiURL)
+	data, err := Request(client.httpClient, apiURL)
 	if err != nil {
 		return tweets, err
 	}

modules/twitter/request.go

@@ -2,21 +2,11 @@ package twitter
 
 import (
 	"bytes"
-	"fmt"
 	"net/http"
 )
 
-func Request(bearerToken string, apiURL string) ([]byte, error) {
+func Request(httpClient *http.Client, apiURL string) ([]byte, error) {
-	req, err := http.NewRequest("GET", apiURL, nil)
+	resp, err := httpClient.Get(apiURL)
-	if err != nil {
-		return nil, err
-	}
-
-	// Expected authorization format for single-application twitter dev accounts
-	req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", bearerToken))
-
-	client := &http.Client{}
-	resp, err := client.Do(req)
 	if err != nil {
 		return nil, err
 	}

modules/twitter/settings.go

@@ -16,6 +16,8 @@ type Settings struct {
 	common *cfg.Common
 
 	bearerToken    string
+	consumerKey    string
+	consumerSecret string
 	count          int
 	screenNames    []interface{}
 }
@@ -25,6 +27,8 @@ func NewSettingsFromYAML(name string, ymlConfig *config.Config, globalConfig *co
 		common: cfg.NewCommonSettingsFromModule(name, defaultTitle, defaultFocusable, ymlConfig, globalConfig),
 
 		bearerToken:    ymlConfig.UString("bearerToken", os.Getenv("WTF_TWITTER_BEARER_TOKEN")),
+		consumerKey:    ymlConfig.UString("consumerKey", os.Getenv("WTF_TWITTER_CONSUMER_KEY")),
+		consumerSecret: ymlConfig.UString("consumerSecret", os.Getenv("WTF_TWITTER_CONSUMER_SECRET")),
 		count:          ymlConfig.UInt("count", 5),
 		screenNames:    ymlConfig.UList("screenName"),
 	}

modules/twitterstats/client.go

@@ -0,0 +1,104 @@
+package twitterstats
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+
+	"golang.org/x/oauth2"
+	"golang.org/x/oauth2/clientcredentials"
+)
+
+// Client contains state that allows stats to be fetched about a list of Twitter users
+type Client struct {
+	httpClient  *http.Client
+	screenNames []string
+	bearerToken string
+}
+
+// TwitterStats Represents a stats snapshot for a single Twitter user at a point in time
+type TwitterStats struct {
+	FollowerCount int64 `json:"followers_count"`
+	TweetCount    int64 `json:"statuses_count"`
+}
+
+const (
+	userTimelineURL = "https://api.twitter.com/1.1/users/show.json"
+)
+
+// NewClient creates a new twitterstats client that contains an OAuth2 HTTP client which can be used
+func NewClient(settings *Settings) *Client {
+	usernames := make([]string, len(settings.screenNames))
+	for i, username := range settings.screenNames {
+		var ok bool
+		if usernames[i], ok = username.(string); !ok {
+			log.Fatalf("All `screenName`s in twitterstats config must be of type string")
+		}
+	}
+
+	var httpClient *http.Client
+	// If a bearer token is supplied, use that directly.  Otherwise, let the Oauth client fetch a token
+	// using the consumer key and secret.
+	if settings.bearerToken == "" {
+		conf := &clientcredentials.Config{
+			ClientID:     settings.consumerKey,
+			ClientSecret: settings.consumerSecret,
+			TokenURL:     "https://api.twitter.com/oauth2/token",
+		}
+		httpClient = conf.Client(oauth2.NoContext)
+	} else {
+		ctx := context.Background()
+		httpClient = oauth2.NewClient(ctx, oauth2.StaticTokenSource(&oauth2.Token{
+			AccessToken: settings.bearerToken,
+			TokenType:   "Bearer",
+		}))
+	}
+
+	client := Client{
+		httpClient:  httpClient,
+		screenNames: usernames,
+	}
+
+	return &client
+}
+
+// GetStatsForUser Fetches stats for a single user.  If there is an error fetching or parsing the response
+// from the Twitter API, an empty stats struct will be returned.
+func (client *Client) GetStatsForUser(username string) TwitterStats {
+	stats := TwitterStats{
+		FollowerCount: 0,
+		TweetCount:    0,
+	}
+
+	url := fmt.Sprintf("%s?screen_name=%s", userTimelineURL, username)
+	res, err := client.httpClient.Get(url)
+	if err != nil {
+		return stats
+	}
+	defer res.Body.Close()
+
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return stats
+	}
+
+	// If there is an error while parsing, just discard the error and return the empty stats
+	json.Unmarshal(body, &stats)
+
+	return stats
+}
+
+// GetStats Returns a slice of `TwitterStats` structs for each username in `client.screenNames` in the same
+// order of `client.screenNames`
+func (client *Client) GetStats() []TwitterStats {
+	stats := make([]TwitterStats, len(client.screenNames))
+
+	for i, username := range client.screenNames {
+		stats[i] = client.GetStatsForUser(username)
+	}
+
+	return stats
+}

modules/twitterstats/settings.go

@@ -0,0 +1,36 @@
+package twitterstats
+
+import (
+	"os"
+
+	"github.com/olebedev/config"
+	"github.com/wtfutil/wtf/cfg"
+)
+
+const (
+	defaultFocusable = true
+	defaultTitle     = "Twitter Stats"
+)
+
+type Settings struct {
+	common *cfg.Common
+
+	bearerToken    string
+	consumerKey    string
+	consumerSecret string
+	screenNames    []interface{}
+}
+
+func NewSettingsFromYAML(name string, ymlConfig *config.Config, globalConfig *config.Config) *Settings {
+	settings := Settings{
+		common: cfg.NewCommonSettingsFromModule(name, defaultTitle, defaultFocusable, ymlConfig, globalConfig),
+
+		bearerToken:    ymlConfig.UString("bearerToken", os.Getenv("WTF_TWITTER_BEARER_TOKEN")),
+		consumerKey:    ymlConfig.UString("consumerKey", os.Getenv("WTF_TWITTER_CONSUMER_KEY")),
+		consumerSecret: ymlConfig.UString("consumerSecret", os.Getenv("WTF_TWITTER_CONSUMER_SECRET")),
+
+		screenNames: ymlConfig.UList("screenNames"),
+	}
+
+	return &settings
+}

modules/twitterstats/widget.go

@@ -0,0 +1,49 @@
+package twitterstats
+
+import (
+	"fmt"
+
+	"github.com/rivo/tview"
+	"github.com/wtfutil/wtf/view"
+)
+
+type Widget struct {
+	view.TextWidget
+
+	client *Client
+}
+
+func NewWidget(app *tview.Application, pages *tview.Pages, settings *Settings) *Widget {
+	widget := Widget{
+		TextWidget: view.NewTextWidget(app, settings.common),
+		client:     NewClient(settings),
+	}
+
+	widget.View.SetBorderPadding(1, 1, 1, 1)
+	widget.View.SetWrap(true)
+	widget.View.SetWordWrap(true)
+
+	return &widget
+}
+
+func (widget *Widget) Refresh() {
+	widget.Redraw(widget.content)
+}
+
+func (widget *Widget) content() (string, string, bool) {
+	usernames := widget.client.screenNames
+	stats := widget.client.GetStats()
+
+	// Add header row
+	str := fmt.Sprintf("%-16s %8s %8s\n", "Username", "Followers", "Tweets")
+
+	// Add rows for each of the followed usernames
+	for i, username := range usernames {
+		followerCount := stats[i].FollowerCount
+		tweetCount := stats[i].TweetCount
+
+		str += fmt.Sprintf("%-16s %8d %8d\n", username, followerCount, tweetCount)
+	}
+
+	return "Twitter Stats", str, true
+}