package main
import (
"context"
"encoding/json"
"fmt"
"log"
"net/http"
"os"
"reflect"
"strings"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"google.golang.org/api/driveactivity/v2"
"google.golang.org/api/option"
)
// Retrieve a token, saves the token, then returns the generated client.
func getClient(config *oauth2.Config) *http.Client {
// The file token.json stores the user's access and refresh tokens, and is
// created automatically when the authorization flow completes for the first
// time.
tokFile := "token.json"
tok, err := tokenFromFile(tokFile)
if err != nil {
tok = getTokenFromWeb(config)
saveToken(tokFile, tok)
}
return config.Client(context.Background(), tok)
}
// Request a token from the web, then returns the retrieved token.
func getTokenFromWeb(config *oauth2.Config) *oauth2.Token {
authURL := config.AuthCodeURL("state-token", oauth2.AccessTypeOffline)
fmt.Printf("Go to the following link in your browser then type the "+
"authorization code: \n%v\n", authURL)
var authCode string
if _, err := fmt.Scan(&authCode); err != nil {
log.Fatalf("Unable to read authorization code: %v", err)
}
tok, err := config.Exchange(context.TODO(), authCode)
if err != nil {
log.Fatalf("Unable to retrieve token from web: %v", err)
}
return tok
}
// Retrieves a token from a local file.
func tokenFromFile(file string) (*oauth2.Token, error) {
f, err := os.Open(file)
if err != nil {
return nil, err
}
defer f.Close()
tok := &oauth2.Token{}
err = json.NewDecoder(f).Decode(tok)
return tok, err
}
// Saves a token to a file path.
func saveToken(path string, token *oauth2.Token) {
fmt.Printf("Saving credential file to: %s\n", path)
f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
log.Fatalf("Unable to cache oauth token: %v", err)
}
defer f.Close()
json.NewEncoder(f).Encode(token)
}
// Returns a string representation of the first elements in a list.
func truncated(array []string) string {
return truncatedTo(array, 2)
}
// Returns a string representation of the first elements in a list.
func truncatedTo(array []string, limit int) string {
var contents string
var more string
if len(array) <= limit {
contents = strings.Join(array, ", ")
more = ""
} else {
contents = strings.Join(array[0:limit], ", ")
more = ", ..."
}
return fmt.Sprintf("[%s%s]", contents, more)
}
// Returns the name of a set property in an object, or else "unknown".
func getOneOf(m interface{}) string {
v := reflect.ValueOf(m)
for i := 0; i < v.NumField(); i++ {
if !v.Field(i).IsNil() {
return v.Type().Field(i).Name
}
}
return "unknown"
}
// Returns a time associated with an activity.
func getTimeInfo(activity *driveactivity.DriveActivity) string {
if activity.Timestamp != "" {
return activity.Timestamp
}
if activity.TimeRange != nil {
return activity.TimeRange.EndTime
}
return "unknown"
}
// Returns the type of action.
func getActionInfo(action *driveactivity.ActionDetail) string {
return getOneOf(*action)
}
// Returns user information, or the type of user if not a known user.
func getUserInfo(user *driveactivity.User) string {
if user.KnownUser != nil {
if user.KnownUser.IsCurrentUser {
return "people/me"
}
return user.KnownUser.PersonName
}
return getOneOf(*user)
}
// Returns actor information, or the type of actor if not a user.
func getActorInfo(actor *driveactivity.Actor) string {
if actor.User != nil {
return getUserInfo(actor.User)
}
return getOneOf(*actor)
}
// Returns information for a list of actors.
func getActorsInfo(actors []*driveactivity.Actor) []string {
actorsInfo := make([]string, len(actors))
for i := range actors {
actorsInfo[i] = getActorInfo(actors[i])
}
return actorsInfo
}
// Returns the type of a target and an associated title.
func getTargetInfo(target *driveactivity.Target) string {
if target.DriveItem != nil {
return fmt.Sprintf("driveItem:\"%s\"", target.DriveItem.Title)
}
if target.Drive != nil {
return fmt.Sprintf("drive:\"%s\"", target.Drive.Title)
}
if target.FileComment != nil {
parent := target.FileComment.Parent
if parent != nil {
return fmt.Sprintf("fileComment:\"%s\"", parent.Title)
}
return "fileComment:unknown"
}
return getOneOf(*target)
}
// Returns information for a list of targets.
func getTargetsInfo(targets []*driveactivity.Target) []string {
targetsInfo := make([]string, len(targets))
for i := range targets {
targetsInfo[i] = getTargetInfo(targets[i])
}
return targetsInfo
}
func main() {
ctx := context.Background()
b, err := os.ReadFile("credentials.json")
if err != nil {
log.Fatalf("Unable to read client secret file: %v", err)
}
// If modifying these scopes, delete your previously saved token.json.
config, err := google.ConfigFromJSON(b, driveactivity.DriveActivityReadonlyScope)
if err != nil {
log.Fatalf("Unable to parse client secret file to config: %v", err)
}
client := getClient(config)
srv, err := driveactivity.NewService(ctx, option.WithHTTPClient(client))
if err != nil {
log.Fatalf("Unable to retrieve driveactivity Client %v", err)
}
q := driveactivity.QueryDriveActivityRequest{PageSize: 10}
r, err := srv.Activity.Query(&q).Do()
if err != nil {
log.Fatalf("Unable to retrieve list of activities. %v", err)
}
fmt.Println("Recent Activity:")
if len(r.Activities) > 0 {
for _, a := range r.Activities {
time := getTimeInfo(a)
action := getActionInfo(a.PrimaryActionDetail)
actors := getActorsInfo(a.Actors)
targets := getTargetsInfo(a.Targets)
fmt.Printf("%s: %s, %s, %s\n", time, truncated(actors), action, truncated(targets))
}
} else {
fmt.Print("No activity.")
}
}
