bloat/service/service.go

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package service
import (
"bytes"
"context"
"encoding/json"
"errors"
"io"
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"mime/multipart"
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"net/http"
"net/url"
"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)
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GetUserToken(ctx context.Context, sessionID string, c *model.Client, token string) (accessToken string, err error)
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ServeErrorPage(ctx context.Context, client io.Writer, err error)
ServeSigninPage(ctx context.Context, client io.Writer) (err error)
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ServeTimelinePage(ctx context.Context, client io.Writer, c *model.Client, maxID string, sinceID string, minID string) (err error)
ServeThreadPage(ctx context.Context, client io.Writer, c *model.Client, id string, reply bool) (err error)
ServeNotificationPage(ctx context.Context, client io.Writer, c *model.Client, maxID string, minID string) (err error)
ServeUserPage(ctx context.Context, client io.Writer, c *model.Client, id string, maxID string, minID string) (err error)
ServeAboutPage(ctx context.Context, client io.Writer, c *model.Client) (err error)
Like(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
UnLike(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
Retweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
UnRetweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
PostTweet(ctx context.Context, client io.Writer, c *model.Client, content string, replyToID string, visibility string, files []*multipart.FileHeader) (id string, err error)
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Follow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
UnFollow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error)
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}
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) {
var instanceURL string
if strings.HasPrefix(instance, "https://") {
instanceURL = instance
instance = strings.TrimPrefix(instance, "https://")
} else {
instanceURL = "https://" + instance
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}
sessionID = util.NewSessionId()
err = svc.sessionRepo.Add(model.Session{
ID: sessionID,
InstanceDomain: instance,
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})
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: instanceURL,
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ClientName: svc.clientName,
Scopes: svc.clientScope,
Website: svc.clientWebsite,
RedirectURIs: svc.clientWebsite + "/oauth_callback",
})
if err != nil {
return
}
app = model.App{
InstanceDomain: instance,
InstanceURL: instanceURL,
ClientID: mastoApp.ClientID,
ClientSecret: mastoApp.ClientSecret,
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}
err = svc.appRepo.Add(app)
if err != nil {
return
}
}
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u, err := url.Parse("/oauth/authorize")
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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()
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redirectUrl = instanceURL + u.String()
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return
}
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func (svc *service) GetUserToken(ctx context.Context, sessionID string, c *model.Client,
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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.InstanceDomain)
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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,
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c *model.Client, maxID string, sinceID string, minID string) (err error) {
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var hasNext, hasPrev bool
var nextLink, prevLink string
var pg = mastodon.Pagination{
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MaxID: maxID,
MinID: minID,
Limit: 20,
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}
statuses, err := c.GetTimelineHome(ctx, &pg)
if err != nil {
return err
}
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if len(maxID) > 0 && len(statuses) > 0 {
hasPrev = true
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prevLink = "/timeline?min_id=" + statuses[0].ID
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}
if len(minID) > 0 && len(pg.MinID) > 0 {
newStatuses, err := c.GetTimelineHome(ctx, &mastodon.Pagination{MinID: pg.MinID, Limit: 20})
if err != nil {
return err
}
newStatusesLen := len(newStatuses)
if newStatusesLen == 20 {
hasPrev = true
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prevLink = "/timeline?min_id=" + pg.MinID
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} else {
i := 20 - newStatusesLen - 1
if len(statuses) > i {
hasPrev = true
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prevLink = "/timeline?min_id=" + statuses[i].ID
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}
}
}
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if len(pg.MaxID) > 0 {
hasNext = true
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nextLink = "/timeline?max_id=" + pg.MaxID
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}
postContext := model.PostContext{
DefaultVisibility: c.Session.Settings.DefaultVisibility,
}
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navbarData, err := svc.getNavbarTemplateData(ctx, client, c)
if err != nil {
return
}
data := renderer.NewTimelinePageTemplateData(statuses, hasNext, nextLink, hasPrev, prevLink, postContext, navbarData)
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err = svc.renderer.RenderTimelinePage(ctx, client, data)
if err != nil {
return
}
return
}
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func (svc *service) ServeThreadPage(ctx context.Context, client io.Writer, c *model.Client, id string, reply bool) (err error) {
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status, err := c.GetStatus(ctx, id)
if err != nil {
return
}
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u, err := c.GetAccountCurrentUser(ctx)
if err != nil {
return
}
var postContext model.PostContext
if reply {
var content string
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if u.ID != status.Account.ID {
content += "@" + status.Account.Acct + " "
}
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for i := range status.Mentions {
if status.Mentions[i].ID != u.ID && status.Mentions[i].ID != status.Account.ID {
content += "@" + status.Mentions[i].Acct + " "
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}
}
s, err := c.GetStatus(ctx, id)
if err != nil {
return err
}
postContext = model.PostContext{
DefaultVisibility: s.Visibility,
ReplyContext: &model.ReplyContext{
InReplyToID: id,
InReplyToName: status.Account.Acct,
ReplyContent: content,
},
}
}
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context, err := c.GetStatusContext(ctx, id)
if err != nil {
return
}
statuses := append(append(context.Ancestors, status), context.Descendants...)
replyMap := make(map[string][]mastodon.ReplyInfo)
for i := range statuses {
statuses[i].ShowReplies = true
statuses[i].ReplyMap = replyMap
addToReplyMap(replyMap, statuses[i].InReplyToID, statuses[i].ID, i+1)
}
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navbarData, err := svc.getNavbarTemplateData(ctx, client, c)
if err != nil {
return
}
data := renderer.NewThreadPageTemplateData(statuses, postContext, replyMap, navbarData)
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err = svc.renderer.RenderThreadPage(ctx, client, data)
if err != nil {
return
}
return
}
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func (svc *service) ServeNotificationPage(ctx context.Context, client io.Writer, c *model.Client, maxID string, minID string) (err error) {
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var hasNext bool
var nextLink string
var pg = mastodon.Pagination{
MaxID: maxID,
MinID: minID,
Limit: 20,
}
notifications, err := c.GetNotifications(ctx, &pg)
if err != nil {
return
}
var unreadCount int
for i := range notifications {
switch notifications[i].Type {
case "reblog", "favourite":
if notifications[i].Status != nil {
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notifications[i].Status.HideAccountInfo = true
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}
}
if notifications[i].Pleroma != nil && notifications[i].Pleroma.IsSeen {
unreadCount++
}
}
if unreadCount > 0 {
err := c.ReadNotifications(ctx, notifications[0].ID)
if err != nil {
return err
}
}
if len(pg.MaxID) > 0 {
hasNext = true
nextLink = "/notifications?max_id=" + pg.MaxID
}
navbarData, err := svc.getNavbarTemplateData(ctx, client, c)
if err != nil {
return
}
data := renderer.NewNotificationPageTemplateData(notifications, hasNext, nextLink, navbarData)
err = svc.renderer.RenderNotificationPage(ctx, client, data)
if err != nil {
return
}
return
}
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func (svc *service) ServeUserPage(ctx context.Context, client io.Writer, c *model.Client, id string, maxID string, minID string) (err error) {
user, err := c.GetAccount(ctx, id)
if err != nil {
return
}
var hasNext bool
var nextLink string
var pg = mastodon.Pagination{
MaxID: maxID,
MinID: minID,
Limit: 20,
}
statuses, err := c.GetAccountStatuses(ctx, id, &pg)
if err != nil {
return
}
if len(pg.MaxID) > 0 {
hasNext = true
nextLink = "/user/" + id + "?max_id=" + pg.MaxID
}
navbarData, err := svc.getNavbarTemplateData(ctx, client, c)
if err != nil {
return
}
data := renderer.NewUserPageTemplateData(user, statuses, hasNext, nextLink, navbarData)
err = svc.renderer.RenderUserPage(ctx, client, data)
if err != nil {
return
}
return
}
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func (svc *service) ServeAboutPage(ctx context.Context, client io.Writer, c *model.Client) (err error) {
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navbarData, err := svc.getNavbarTemplateData(ctx, client, c)
if err != nil {
return
}
data := renderer.NewAboutPageTemplateData(navbarData)
err = svc.renderer.RenderAboutPage(ctx, client, data)
if err != nil {
return
}
return
}
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func (svc *service) getNavbarTemplateData(ctx context.Context, client io.Writer, c *model.Client) (data *renderer.NavbarTemplateData, err error) {
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notifications, err := c.GetNotifications(ctx, nil)
if err != nil {
return
}
var notificationCount int
for i := range notifications {
if notifications[i].Pleroma != nil && !notifications[i].Pleroma.IsSeen {
notificationCount++
}
}
data = renderer.NewNavbarTemplateData(notificationCount)
return
}
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func (svc *service) Like(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
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_, err = c.Favourite(ctx, id)
return
}
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func (svc *service) UnLike(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
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_, err = c.Unfavourite(ctx, id)
return
}
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func (svc *service) Retweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
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_, err = c.Reblog(ctx, id)
return
}
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func (svc *service) UnRetweet(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
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_, err = c.Unreblog(ctx, id)
return
}
func (svc *service) PostTweet(ctx context.Context, client io.Writer, c *model.Client, content string, replyToID string, visibility string, files []*multipart.FileHeader) (id string, err error) {
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var mediaIds []string
for _, f := range files {
a, err := c.UploadMediaFromMultipartFileHeader(ctx, f)
if err != nil {
return "", err
}
mediaIds = append(mediaIds, a.ID)
}
// save visibility if it's a non-reply post
if len(replyToID) < 1 && visibility != c.Session.Settings.DefaultVisibility {
c.Session.Settings.DefaultVisibility = visibility
svc.sessionRepo.Add(c.Session)
}
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tweet := &mastodon.Toot{
Status: content,
InReplyToID: replyToID,
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MediaIDs: mediaIds,
Visibility: visibility,
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}
s, err := c.PostStatus(ctx, tweet)
if err != nil {
return
}
return s.ID, nil
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}
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func (svc *service) Follow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
_, err = c.AccountFollow(ctx, id)
return
}
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func (svc *service) UnFollow(ctx context.Context, client io.Writer, c *model.Client, id string) (err error) {
_, err = c.AccountUnfollow(ctx, id)
return
}
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func addToReplyMap(m map[string][]mastodon.ReplyInfo, key interface{}, val string, number int) {
if key == nil {
return
}
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keyStr, ok := key.(string)
if !ok {
return
}
_, ok = m[keyStr]
if !ok {
m[keyStr] = []mastodon.ReplyInfo{}
}
m[keyStr] = append(m[keyStr], mastodon.ReplyInfo{val, number})
}