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bloat/service/service.go

286 lines
7.0 KiB

3 years ago
package service
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"path"
"strings"
"mastodon"
"web/model"
"web/renderer"
"web/util"
)
var (
ErrInvalidArgument = errors.New("invalid argument")
ErrInvalidToken = errors.New("invalid token")
ErrInvalidClient = errors.New("invalid client")
)
type Service interface {
ServeHomePage(ctx context.Context, client io.Writer) (err error)
GetAuthUrl(ctx context.Context, instance string) (url string, sessionID string, err error)
GetUserToken(ctx context.Context, sessionID string, c *mastodon.Client, token string) (accessToken string, err error)
ServeErrorPage(ctx context.Context, client io.Writer, err error)
ServeSigninPage(ctx context.Context, client io.Writer) (err error)
ServeTimelinePage(ctx context.Context, client io.Writer, c *mastodon.Client, maxID string, sinceID string, minID string) (err error)
ServeThreadPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, reply bool) (err error)
Like(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
UnLike(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
Retweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
UnRetweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error)
PostTweet(ctx context.Context, client io.Writer, c *mastodon.Client, content string, replyToID string) (err error)
}
type service struct {
clientName string
clientScope string
clientWebsite string
renderer renderer.Renderer
sessionRepo model.SessionRepository
appRepo model.AppRepository
}
func NewService(clientName string, clientScope string, clientWebsite string,
renderer renderer.Renderer, sessionRepo model.SessionRepository,
appRepo model.AppRepository) Service {
return &service{
clientName: clientName,
clientScope: clientScope,
clientWebsite: clientWebsite,
renderer: renderer,
sessionRepo: sessionRepo,
appRepo: appRepo,
}
}
func (svc *service) GetAuthUrl(ctx context.Context, instance string) (
redirectUrl string, sessionID string, err error) {
if !strings.HasPrefix(instance, "https://") {
instance = "https://" + instance
}
sessionID = util.NewSessionId()
err = svc.sessionRepo.Add(model.Session{
ID: sessionID,
InstanceURL: instance,
})
if err != nil {
return
}
app, err := svc.appRepo.Get(instance)
if err != nil {
if err != model.ErrAppNotFound {
return
}
var mastoApp *mastodon.Application
mastoApp, err = mastodon.RegisterApp(ctx, &mastodon.AppConfig{
Server: instance,
ClientName: svc.clientName,
Scopes: svc.clientScope,
Website: svc.clientWebsite,
RedirectURIs: svc.clientWebsite + "/oauth_callback",
})
if err != nil {
return
}
app = model.App{
InstanceURL: instance,
ClientID: mastoApp.ClientID,
ClientSecret: mastoApp.ClientSecret,
}
err = svc.appRepo.Add(app)
if err != nil {
return
}
}
u, err := url.Parse(path.Join(instance, "/oauth/authorize"))
if err != nil {
return
}
q := make(url.Values)
q.Set("scope", "read write follow")
q.Set("client_id", app.ClientID)
q.Set("response_type", "code")
q.Set("redirect_uri", svc.clientWebsite+"/oauth_callback")
u.RawQuery = q.Encode()
redirectUrl = u.String()
return
}
func (svc *service) GetUserToken(ctx context.Context, sessionID string, c *mastodon.Client,
code string) (token string, err error) {
if len(code) < 1 {
err = ErrInvalidArgument
return
}
session, err := svc.sessionRepo.Get(sessionID)
if err != nil {
return
}
app, err := svc.appRepo.Get(session.InstanceURL)
if err != nil {
return
}
data := &bytes.Buffer{}
err = json.NewEncoder(data).Encode(map[string]string{
"client_id": app.ClientID,
"client_secret": app.ClientSecret,
"grant_type": "authorization_code",
"code": code,
"redirect_uri": svc.clientWebsite + "/oauth_callback",
})
if err != nil {
return
}
resp, err := http.Post(app.InstanceURL+"/oauth/token", "application/json", data)
if err != nil {
return
}
defer resp.Body.Close()
var res struct {
AccessToken string `json:"access_token"`
}
err = json.NewDecoder(resp.Body).Decode(&res)
if err != nil {
return
}
/*
err = c.AuthenticateToken(ctx, code, svc.clientWebsite+"/oauth_callback")
if err != nil {
return
}
err = svc.sessionRepo.Update(sessionID, c.GetAccessToken(ctx))
*/
return res.AccessToken, nil
}
func (svc *service) ServeHomePage(ctx context.Context, client io.Writer) (err error) {
err = svc.renderer.RenderHomePage(ctx, client)
if err != nil {
return
}
return
}
func (svc *service) ServeErrorPage(ctx context.Context, client io.Writer, err error) {
svc.renderer.RenderErrorPage(ctx, client, err)
}
func (svc *service) ServeSigninPage(ctx context.Context, client io.Writer) (err error) {
err = svc.renderer.RenderSigninPage(ctx, client)
if err != nil {
return
}
return
}
func (svc *service) ServeTimelinePage(ctx context.Context, client io.Writer,
c *mastodon.Client, maxID string, sinceID string, minID string) (err error) {
var hasNext, hasPrev bool
var nextLink, prevLink string
var pg = mastodon.Pagination{
MaxID: maxID,
SinceID: sinceID,
MinID: minID,
Limit: 20,
}
statuses, err := c.GetTimelineHome(ctx, &pg)
if err != nil {
return err
}
if len(pg.MaxID) > 0 {
hasNext = true
nextLink = fmt.Sprintf("/timeline?max_id=%s", pg.MaxID)
}
if len(pg.SinceID) > 0 {
hasPrev = true
prevLink = fmt.Sprintf("/timeline?since_id=%s", pg.SinceID)
}
data := renderer.NewTimelinePageTemplateData(statuses, hasNext, nextLink, hasPrev, prevLink)
err = svc.renderer.RenderTimelinePage(ctx, client, data)
if err != nil {
return
}
return
}
func (svc *service) ServeThreadPage(ctx context.Context, client io.Writer, c *mastodon.Client, id string, reply bool) (err error) {
status, err := c.GetStatus(ctx, id)
if err != nil {
return
}
context, err := c.GetStatusContext(ctx, id)
if err != nil {
return
}
data := renderer.NewThreadPageTemplateData(status, context, reply, id)
err = svc.renderer.RenderThreadPage(ctx, client, data)
if err != nil {
return
}
return
}
func (svc *service) Like(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
_, err = c.Favourite(ctx, id)
return
}
func (svc *service) UnLike(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
_, err = c.Unfavourite(ctx, id)
return
}
func (svc *service) Retweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
_, err = c.Reblog(ctx, id)
return
}
func (svc *service) UnRetweet(ctx context.Context, client io.Writer, c *mastodon.Client, id string) (err error) {
_, err = c.Unreblog(ctx, id)
return
}
func (svc *service) PostTweet(ctx context.Context, client io.Writer, c *mastodon.Client, content string, replyToID string) (err error) {
tweet := &mastodon.Toot{
Status: content,
InReplyToID: replyToID,
}
_, err = c.PostStatus(ctx, tweet)
return
}