From e68b9d00a6e05b3a941f63ffb696f91e554ac5ec Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel@debian.org>
Date: Fri, 18 Oct 2024 20:33:49 +0200
Subject: Adding upstream version 9.0.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>
---
 routers/web/repo/issue_content_history.go | 237 ++++++++++++++++++++++++++++++
 1 file changed, 237 insertions(+)
 create mode 100644 routers/web/repo/issue_content_history.go

(limited to 'routers/web/repo/issue_content_history.go')

diff --git a/routers/web/repo/issue_content_history.go b/routers/web/repo/issue_content_history.go
new file mode 100644
index 0000000..16b250a
--- /dev/null
+++ b/routers/web/repo/issue_content_history.go
@@ -0,0 +1,237 @@
+// Copyright 2021 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repo
+
+import (
+	"bytes"
+	"html"
+	"net/http"
+	"strings"
+
+	"code.gitea.io/gitea/models/avatars"
+	issues_model "code.gitea.io/gitea/models/issues"
+	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/templates"
+	"code.gitea.io/gitea/modules/timeutil"
+	"code.gitea.io/gitea/services/context"
+
+	"github.com/sergi/go-diff/diffmatchpatch"
+)
+
+// GetContentHistoryOverview get overview
+func GetContentHistoryOverview(ctx *context.Context) {
+	issue := GetActionIssue(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	editedHistoryCountMap, _ := issues_model.QueryIssueContentHistoryEditedCountMap(ctx, issue.ID)
+	ctx.JSON(http.StatusOK, map[string]any{
+		"i18n": map[string]any{
+			"textEdited":                   ctx.Tr("repo.issues.content_history.edited"),
+			"textDeleteFromHistory":        ctx.Tr("repo.issues.content_history.delete_from_history"),
+			"textDeleteFromHistoryConfirm": ctx.Tr("repo.issues.content_history.delete_from_history_confirm"),
+			"textOptions":                  ctx.Tr("repo.issues.content_history.options"),
+		},
+		"editedHistoryCountMap": editedHistoryCountMap,
+	})
+}
+
+// GetContentHistoryList  get list
+func GetContentHistoryList(ctx *context.Context) {
+	issue := GetActionIssue(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	commentID := ctx.FormInt64("comment_id")
+	items, _ := issues_model.FetchIssueContentHistoryList(ctx, issue.ID, commentID)
+
+	// render history list to HTML for frontend dropdown items: (name, value)
+	// name is HTML of "avatar + userName + userAction + timeSince"
+	// value is historyId
+	var results []map[string]any
+	for _, item := range items {
+		var actionText string
+		if item.IsDeleted {
+			actionTextDeleted := ctx.Locale.TrString("repo.issues.content_history.deleted")
+			actionText = "<i data-history-is-deleted='1'>" + actionTextDeleted + "</i>"
+		} else if item.IsFirstCreated {
+			actionText = ctx.Locale.TrString("repo.issues.content_history.created")
+		} else {
+			actionText = ctx.Locale.TrString("repo.issues.content_history.edited")
+		}
+
+		username := item.UserName
+		if setting.UI.DefaultShowFullName && strings.TrimSpace(item.UserFullName) != "" {
+			username = strings.TrimSpace(item.UserFullName)
+		}
+
+		src := html.EscapeString(item.UserAvatarLink)
+		class := avatars.DefaultAvatarClass + " tw-mr-2"
+		name := html.EscapeString(username)
+		avatarHTML := string(templates.AvatarHTML(src, 28, class, username))
+		timeSinceText := string(timeutil.TimeSinceUnix(item.EditedUnix, ctx.Locale))
+
+		results = append(results, map[string]any{
+			"name":  avatarHTML + "<strong>" + name + "</strong> " + actionText + " " + timeSinceText,
+			"value": item.HistoryID,
+		})
+	}
+
+	ctx.JSON(http.StatusOK, map[string]any{
+		"results": results,
+	})
+}
+
+// canSoftDeleteContentHistory checks whether current user can soft-delete a history revision
+// Admins or owners can always delete history revisions. Normal users can only delete own history revisions.
+func canSoftDeleteContentHistory(ctx *context.Context, issue *issues_model.Issue, comment *issues_model.Comment,
+	history *issues_model.ContentHistory,
+) (canSoftDelete bool) {
+	// CanWrite means the doer can manage the issue/PR list
+	if ctx.Repo.IsOwner() || ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull) {
+		canSoftDelete = true
+	} else if ctx.Doer == nil {
+		canSoftDelete = false
+	} else {
+		// for read-only users, they could still post issues or comments,
+		// they should be able to delete the history related to their own issue/comment, a case is:
+		// 1. the user posts some sensitive data
+		// 2. then the repo owner edits the post but didn't remove the sensitive data
+		// 3. the poster wants to delete the edited history revision
+		if comment == nil {
+			// the issue poster or the history poster can soft-delete
+			canSoftDelete = ctx.Doer.ID == issue.PosterID || ctx.Doer.ID == history.PosterID
+			canSoftDelete = canSoftDelete && (history.IssueID == issue.ID)
+		} else {
+			// the comment poster or the history poster can soft-delete
+			canSoftDelete = ctx.Doer.ID == comment.PosterID || ctx.Doer.ID == history.PosterID
+			canSoftDelete = canSoftDelete && (history.IssueID == issue.ID)
+			canSoftDelete = canSoftDelete && (history.CommentID == comment.ID)
+		}
+	}
+	return canSoftDelete
+}
+
+// GetContentHistoryDetail get detail
+func GetContentHistoryDetail(ctx *context.Context) {
+	issue := GetActionIssue(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	historyID := ctx.FormInt64("history_id")
+	history, prevHistory, err := issues_model.GetIssueContentHistoryAndPrev(ctx, issue.ID, historyID)
+	if err != nil {
+		ctx.JSON(http.StatusNotFound, map[string]any{
+			"message": "Can not find the content history",
+		})
+		return
+	}
+
+	// get the related comment if this history revision is for a comment, otherwise the history revision is for an issue.
+	var comment *issues_model.Comment
+	if history.CommentID != 0 {
+		var err error
+		if comment, err = issues_model.GetCommentByID(ctx, history.CommentID); err != nil {
+			log.Error("can not get comment for issue content history %v. err=%v", historyID, err)
+			return
+		}
+	}
+
+	// get the previous history revision (if exists)
+	var prevHistoryID int64
+	var prevHistoryContentText string
+	if prevHistory != nil {
+		prevHistoryID = prevHistory.ID
+		prevHistoryContentText = prevHistory.ContentText
+	}
+
+	// compare the current history revision with the previous one
+	dmp := diffmatchpatch.New()
+	// `checklines=false` makes better diff result
+	diff := dmp.DiffMain(prevHistoryContentText, history.ContentText, false)
+	diff = dmp.DiffCleanupSemantic(diff)
+	diff = dmp.DiffCleanupEfficiency(diff)
+
+	// use chroma to render the diff html
+	diffHTMLBuf := bytes.Buffer{}
+	diffHTMLBuf.WriteString("<pre class='chroma'>")
+	for _, it := range diff {
+		if it.Type == diffmatchpatch.DiffInsert {
+			diffHTMLBuf.WriteString("<span class='gi'>")
+			diffHTMLBuf.WriteString(html.EscapeString(it.Text))
+			diffHTMLBuf.WriteString("</span>")
+		} else if it.Type == diffmatchpatch.DiffDelete {
+			diffHTMLBuf.WriteString("<span class='gd'>")
+			diffHTMLBuf.WriteString(html.EscapeString(it.Text))
+			diffHTMLBuf.WriteString("</span>")
+		} else {
+			diffHTMLBuf.WriteString(html.EscapeString(it.Text))
+		}
+	}
+	diffHTMLBuf.WriteString("</pre>")
+
+	ctx.JSON(http.StatusOK, map[string]any{
+		"canSoftDelete": canSoftDeleteContentHistory(ctx, issue, comment, history),
+		"historyId":     historyID,
+		"prevHistoryId": prevHistoryID,
+		"diffHtml":      diffHTMLBuf.String(),
+	})
+}
+
+// SoftDeleteContentHistory soft delete
+func SoftDeleteContentHistory(ctx *context.Context) {
+	issue := GetActionIssue(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	commentID := ctx.FormInt64("comment_id")
+	historyID := ctx.FormInt64("history_id")
+
+	var comment *issues_model.Comment
+	var history *issues_model.ContentHistory
+	var err error
+
+	if history, err = issues_model.GetIssueContentHistoryByID(ctx, historyID); err != nil {
+		log.Error("can not get issue content history %v. err=%v", historyID, err)
+		return
+	}
+	if history.IssueID != issue.ID {
+		ctx.NotFound("CompareRepoID", issues_model.ErrCommentNotExist{})
+		return
+	}
+	if commentID != 0 {
+		if history.CommentID != commentID {
+			ctx.NotFound("CompareCommentID", issues_model.ErrCommentNotExist{})
+			return
+		}
+
+		if comment, err = issues_model.GetCommentByID(ctx, commentID); err != nil {
+			log.Error("can not get comment for issue content history %v. err=%v", historyID, err)
+			return
+		}
+		if comment.IssueID != issue.ID {
+			ctx.NotFound("CompareIssueID", issues_model.ErrCommentNotExist{})
+			return
+		}
+	}
+
+	canSoftDelete := canSoftDeleteContentHistory(ctx, issue, comment, history)
+	if !canSoftDelete {
+		ctx.JSON(http.StatusForbidden, map[string]any{
+			"message": "Can not delete the content history",
+		})
+		return
+	}
+
+	err = issues_model.SoftDeleteIssueContentHistory(ctx, historyID)
+	log.Debug("soft delete issue content history. issue=%d, comment=%d, history=%d", issue.ID, commentID, historyID)
+	ctx.JSON(http.StatusOK, map[string]any{
+		"ok": err == nil,
+	})
+}
-- 
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