Add RSS/Atom feed support for user actions (#16002)

Return rss/atom feed for user based on rss url suffix or Content-Type header.

4 files changed, 286 insertions, 38 deletions

diff --git a/routers/web/feed/convert.go b/routers/web/feed/convert.go
new file mode 100644
index 0000000000..8fd8a6c6b7
--- /dev/null
+++ b/routers/web/feed/convert.go
@@ -0,0 +1,154 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package feed
+
+import (
+	"fmt"
+	"html"
+	"net/url"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/templates"
+
+	"github.com/gorilla/feeds"
+)
+
+// feedActionsToFeedItems convert gitea's Action feed to feeds Item
+func feedActionsToFeedItems(ctx *context.Context, actions []*models.Action) (items []*feeds.Item, err error) {
+	for _, act := range actions {
+		act.LoadActUser()
+
+		content, desc, title := "", "", ""
+
+		link := &feeds.Link{Href: act.GetCommentLink()}
+
+		// title
+		title = act.ActUser.DisplayName() + " "
+		switch act.OpType {
+		case models.ActionCreateRepo:
+			title += ctx.Tr("action.create_repo", act.GetRepoLink(), act.ShortRepoPath())
+		case models.ActionRenameRepo:
+			title += ctx.Tr("action.rename_repo", act.GetContent(), act.GetRepoLink(), act.ShortRepoPath())
+		case models.ActionCommitRepo:
+			branchLink := act.GetBranch()
+			if len(act.Content) != 0 {
+				title += ctx.Tr("action.commit_repo", act.GetRepoLink(), branchLink, act.GetBranch(), act.ShortRepoPath())
+			} else {
+				title += ctx.Tr("action.create_branch", act.GetRepoLink(), branchLink, act.GetBranch(), act.ShortRepoPath())
+			}
+		case models.ActionCreateIssue:
+			title += ctx.Tr("action.create_issue", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionCreatePullRequest:
+			title += ctx.Tr("action.create_pull_request", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionTransferRepo:
+			title += ctx.Tr("action.transfer_repo", act.GetContent(), act.GetRepoLink(), act.ShortRepoPath())
+		case models.ActionPushTag:
+			title += ctx.Tr("action.push_tag", act.GetRepoLink(), url.QueryEscape(act.GetTag()), act.ShortRepoPath())
+		case models.ActionCommentIssue:
+			title += ctx.Tr("action.comment_issue", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionMergePullRequest:
+			title += ctx.Tr("action.merge_pull_request", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionCloseIssue:
+			title += ctx.Tr("action.close_issue", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionReopenIssue:
+			title += ctx.Tr("action.reopen_issue", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionClosePullRequest:
+			title += ctx.Tr("action.close_pull_request", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionReopenPullRequest:
+			title += ctx.Tr("action.reopen_pull_request", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath)
+		case models.ActionDeleteTag:
+			title += ctx.Tr("action.delete_tag", act.GetRepoLink(), html.EscapeString(act.GetTag()), act.ShortRepoPath())
+		case models.ActionDeleteBranch:
+			title += ctx.Tr("action.delete_branch", act.GetRepoLink(), html.EscapeString(act.GetBranch()), act.ShortRepoPath())
+		case models.ActionMirrorSyncPush:
+			title += ctx.Tr("action.mirror_sync_push", act.GetRepoLink(), url.QueryEscape(act.GetBranch()), html.EscapeString(act.GetBranch()), act.ShortRepoPath())
+		case models.ActionMirrorSyncCreate:
+			title += ctx.Tr("action.mirror_sync_create", act.GetRepoLink(), html.EscapeString(act.GetBranch()), act.ShortRepoPath())
+		case models.ActionMirrorSyncDelete:
+			title += ctx.Tr("action.mirror_sync_delete", act.GetRepoLink(), html.EscapeString(act.GetBranch()), act.ShortRepoPath())
+		case models.ActionApprovePullRequest:
+			title += ctx.Tr("action.approve_pull_request", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionRejectPullRequest:
+			title += ctx.Tr("action.reject_pull_request", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionCommentPull:
+			title += ctx.Tr("action.comment_pull", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath())
+		case models.ActionPublishRelease:
+			title += ctx.Tr("action.publish_release", act.GetRepoLink(), html.EscapeString(act.GetBranch()), act.ShortRepoPath(), act.Content)
+		case models.ActionPullReviewDismissed:
+			title += ctx.Tr("action.review_dismissed", act.GetRepoLink(), act.GetIssueInfos()[0], act.ShortRepoPath(), act.GetIssueInfos()[1])
+		case models.ActionStarRepo:
+			title += ctx.Tr("action.stared_repo", act.GetRepoLink(), act.GetRepoPath())
+			link = &feeds.Link{Href: act.GetRepoLink()}
+		case models.ActionWatchRepo:
+			title += ctx.Tr("action.watched_repo", act.GetRepoLink(), act.GetRepoPath())
+			link = &feeds.Link{Href: act.GetRepoLink()}
+		default:
+			return nil, fmt.Errorf("unknown action type: %v", act.OpType)
+		}
+
+		// description & content
+		{
+			switch act.OpType {
+			case models.ActionCommitRepo, models.ActionMirrorSyncPush:
+				push := templates.ActionContent2Commits(act)
+				repoLink := act.GetRepoLink()
+
+				for _, commit := range push.Commits {
+					if len(desc) != 0 {
+						desc += "\n\n"
+					}
+					desc += fmt.Sprintf("<a href=\"%s\">%s</a>\n%s",
+						fmt.Sprintf("%s/commit/%s", act.GetRepoLink(), commit.Sha1),
+						commit.Sha1,
+						templates.RenderCommitMessage(commit.Message, repoLink, nil),
+					)
+				}
+
+				if push.Len > 1 {
+					link = &feeds.Link{Href: fmt.Sprintf("%s/%s", setting.AppSubURL, push.CompareURL)}
+				} else if push.Len == 1 {
+					link = &feeds.Link{Href: fmt.Sprintf("%s/commit/%s", act.GetRepoLink(), push.Commits[0].Sha1)}
+				}
+
+			case models.ActionCreateIssue, models.ActionCreatePullRequest:
+				desc = strings.Join(act.GetIssueInfos(), "#")
+				content = act.GetIssueContent()
+			case models.ActionCommentIssue, models.ActionApprovePullRequest, models.ActionRejectPullRequest, models.ActionCommentPull:
+				desc = act.GetIssueTitle()
+				comment := act.GetIssueInfos()[1]
+				if len(comment) != 0 {
+					desc += "\n\n" + comment
+				}
+			case models.ActionMergePullRequest:
+				desc = act.GetIssueInfos()[1]
+			case models.ActionCloseIssue, models.ActionReopenIssue, models.ActionClosePullRequest, models.ActionReopenPullRequest:
+				desc = act.GetIssueTitle()
+			case models.ActionPullReviewDismissed:
+				desc = ctx.Tr("action.review_dismissed_reason") + "\n\n" + act.GetIssueInfos()[2]
+			}
+		}
+		if len(content) == 0 {
+			content = desc
+		}
+
+		items = append(items, &feeds.Item{
+			Title:       title,
+			Link:        link,
+			Description: desc,
+			Author: &feeds.Author{
+				Name:  act.ActUser.DisplayName(),
+				Email: act.ActUser.GetEmail(),
+			},
+			Id:      strconv.FormatInt(act.ID, 10),
+			Created: act.CreatedUnix.AsTime(),
+			Content: content,
+		})
+	}
+	return
+}
diff --git a/routers/web/feed/profile.go b/routers/web/feed/profile.go
new file mode 100644
index 0000000000..8bd0cb7c29
--- /dev/null
+++ b/routers/web/feed/profile.go
@@ -0,0 +1,98 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package feed
+
+import (
+	"net/http"
+	"time"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/context"
+
+	"github.com/gorilla/feeds"
+)
+
+// RetrieveFeeds loads feeds for the specified user
+func RetrieveFeeds(ctx *context.Context, options models.GetFeedsOptions) []*models.Action {
+	actions, err := models.GetFeeds(options)
+	if err != nil {
+		ctx.ServerError("GetFeeds", err)
+		return nil
+	}
+
+	userCache := map[int64]*models.User{options.RequestedUser.ID: options.RequestedUser}
+	if ctx.User != nil {
+		userCache[ctx.User.ID] = ctx.User
+	}
+	for _, act := range actions {
+		if act.ActUser != nil {
+			userCache[act.ActUserID] = act.ActUser
+		}
+	}
+
+	for _, act := range actions {
+		repoOwner, ok := userCache[act.Repo.OwnerID]
+		if !ok {
+			repoOwner, err = models.GetUserByID(act.Repo.OwnerID)
+			if err != nil {
+				if models.IsErrUserNotExist(err) {
+					continue
+				}
+				ctx.ServerError("GetUserByID", err)
+				return nil
+			}
+			userCache[repoOwner.ID] = repoOwner
+		}
+		act.Repo.Owner = repoOwner
+	}
+	return actions
+}
+
+// ShowUserFeed show user activity as RSS / Atom feed
+func ShowUserFeed(ctx *context.Context, ctxUser *models.User, formatType string) {
+	actions := RetrieveFeeds(ctx, models.GetFeedsOptions{
+		RequestedUser:   ctxUser,
+		Actor:           ctx.User,
+		IncludePrivate:  false,
+		OnlyPerformedBy: true,
+		IncludeDeleted:  false,
+		Date:            ctx.FormString("date"),
+	})
+	if ctx.Written() {
+		return
+	}
+
+	feed := &feeds.Feed{
+		Title:       ctx.Tr("home.feed_of", ctxUser.DisplayName()),
+		Link:        &feeds.Link{Href: ctxUser.HTMLURL()},
+		Description: ctxUser.Description,
+		Created:     time.Now(),
+	}
+
+	var err error
+	feed.Items, err = feedActionsToFeedItems(ctx, actions)
+	if err != nil {
+		ctx.ServerError("convert feed", err)
+		return
+	}
+
+	writeFeed(ctx, feed, formatType)
+}
+
+// writeFeed write a feeds.Feed as atom or rss to ctx.Resp
+func writeFeed(ctx *context.Context, feed *feeds.Feed, formatType string) {
+	ctx.Resp.WriteHeader(http.StatusOK)
+	if formatType == "atom" {
+		ctx.Resp.Header().Set("Content-Type", "application/atom+xml;charset=utf-8")
+		if err := feed.WriteAtom(ctx.Resp); err != nil {
+			ctx.ServerError("Render Atom failed", err)
+		}
+	} else {
+		ctx.Resp.Header().Set("Content-Type", "application/rss+xml;charset=utf-8")
+		if err := feed.WriteRss(ctx.Resp); err != nil {
+			ctx.ServerError("Render RSS failed", err)
+		}
+	}
+}
diff --git a/routers/web/user/home.go b/routers/web/user/home.go
index d2b67e6e59..959b1aa1e9 100644
--- a/routers/web/user/home.go
+++ b/routers/web/user/home.go
@@ -25,6 +25,7 @@ import (
 	"code.gitea.io/gitea/modules/markup/markdown"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/routers/web/feed"
 	issue_service "code.gitea.io/gitea/services/issue"
 	pull_service "code.gitea.io/gitea/services/pull"
 
@@ -60,42 +61,6 @@ func getDashboardContextUser(ctx *context.Context) *models.User {
 	return ctxUser
 }
 
-// retrieveFeeds loads feeds for the specified user
-func retrieveFeeds(ctx *context.Context, options models.GetFeedsOptions) {
-	actions, err := models.GetFeeds(options)
-	if err != nil {
-		ctx.ServerError("GetFeeds", err)
-		return
-	}
-
-	userCache := map[int64]*models.User{options.RequestedUser.ID: options.RequestedUser}
-	if ctx.User != nil {
-		userCache[ctx.User.ID] = ctx.User
-	}
-	for _, act := range actions {
-		if act.ActUser != nil {
-			userCache[act.ActUserID] = act.ActUser
-		}
-	}
-
-	for _, act := range actions {
-		repoOwner, ok := userCache[act.Repo.OwnerID]
-		if !ok {
-			repoOwner, err = models.GetUserByID(act.Repo.OwnerID)
-			if err != nil {
-				if models.IsErrUserNotExist(err) {
-					continue
-				}
-				ctx.ServerError("GetUserByID", err)
-				return
-			}
-			userCache[repoOwner.ID] = repoOwner
-		}
-		act.Repo.Owner = repoOwner
-	}
-	ctx.Data["Feeds"] = actions
-}
-
 // Dashboard render the dashboard page
 func Dashboard(ctx *context.Context) {
 	ctxUser := getDashboardContextUser(ctx)
@@ -154,7 +119,7 @@ func Dashboard(ctx *context.Context) {
 	ctx.Data["MirrorCount"] = len(mirrors)
 	ctx.Data["Mirrors"] = mirrors
 
-	retrieveFeeds(ctx, models.GetFeedsOptions{
+	ctx.Data["Feeds"] = feed.RetrieveFeeds(ctx, models.GetFeedsOptions{
 		RequestedUser:   ctxUser,
 		RequestedTeam:   ctx.Org.Team,
 		Actor:           ctx.User,
@@ -167,6 +132,7 @@ func Dashboard(ctx *context.Context) {
 	if ctx.Written() {
 		return
 	}
+
 	ctx.HTML(http.StatusOK, tplDashboard)
 }
 
diff --git a/routers/web/user/profile.go b/routers/web/user/profile.go
index d64d5621de..d2a8d83faa 100644
--- a/routers/web/user/profile.go
+++ b/routers/web/user/profile.go
@@ -18,6 +18,7 @@ import (
 	"code.gitea.io/gitea/modules/markup/markdown"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/routers/web/feed"
 	"code.gitea.io/gitea/routers/web/org"
 )
 
@@ -71,12 +72,35 @@ func Profile(ctx *context.Context) {
 		uname = strings.TrimSuffix(uname, ".gpg")
 	}
 
+	showFeedType := ""
+	if strings.HasSuffix(uname, ".rss") {
+		showFeedType = "rss"
+		uname = strings.TrimSuffix(uname, ".rss")
+	} else if strings.Contains(ctx.Req.Header.Get("Accept"), "application/rss+xml") {
+		showFeedType = "rss"
+	}
+	if strings.HasSuffix(uname, ".atom") {
+		showFeedType = "atom"
+		uname = strings.TrimSuffix(uname, ".atom")
+	} else if strings.Contains(ctx.Req.Header.Get("Accept"), "application/atom+xml") {
+		showFeedType = "atom"
+	}
+
 	ctxUser := GetUserByName(ctx, uname)
 	if ctx.Written() {
 		return
 	}
 
 	if ctxUser.IsOrganization() {
+		/*
+			// TODO: enable after rss.RetrieveFeeds() do handle org correctly
+			// Show Org RSS feed
+			if len(showFeedType) != 0 {
+				rss.ShowUserFeed(ctx, ctxUser, showFeedType)
+				return
+			}
+		*/
+
 		org.Home(ctx)
 		return
 	}
@@ -99,6 +123,12 @@ func Profile(ctx *context.Context) {
 		return
 	}
 
+	// Show User RSS feed
+	if len(showFeedType) != 0 {
+		feed.ShowUserFeed(ctx, ctxUser, showFeedType)
+		return
+	}
+
 	// Show OpenID URIs
 	openIDs, err := models.GetUserOpenIDs(ctxUser.ID)
 	if err != nil {
@@ -217,7 +247,7 @@ func Profile(ctx *context.Context) {
 
 		total = ctxUser.NumFollowing
 	case "activity":
-		retrieveFeeds(ctx, models.GetFeedsOptions{RequestedUser: ctxUser,
+		ctx.Data["Feeds"] = feed.RetrieveFeeds(ctx, models.GetFeedsOptions{RequestedUser: ctxUser,
 			Actor:           ctx.User,
 			IncludePrivate:  showPrivate,
 			OnlyPerformedBy: true,