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Save and view issue/comment content history (#16909)
* issue content history * Use timeutil.TimeStampNow() for content history time instead of issue/comment.UpdatedUnix (which are not updated in time) * i18n for frontend * refactor * clean up * fix refactor * re-format * temp refactor * follow db refactor * rename IssueContentHistory to ContentHistory, remove empty model tags * fix html * use avatar refactor to generate avatar url * add unit test, keep at most 20 history revisions. * re-format * syntax nit * Add issue content history table * Update models/migrations/v197.go Co-authored-by: 6543 <6543@obermui.de> * fix merge Co-authored-by: zeripath <art27@cantab.net> Co-authored-by: 6543 <6543@obermui.de> Co-authored-by: Lauris BH <lauris@nix.lv>
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17 changed files with 766 additions and 8 deletions
230
models/issues/content_history.go
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230
models/issues/content_history.go
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// Copyright 2021 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package issues
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import (
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"context"
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"fmt"
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"code.gitea.io/gitea/models/avatars"
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"code.gitea.io/gitea/models/db"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/timeutil"
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"xorm.io/builder"
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)
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// ContentHistory save issue/comment content history revisions.
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type ContentHistory struct {
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ID int64 `xorm:"pk autoincr"`
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PosterID int64
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IssueID int64 `xorm:"INDEX"`
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CommentID int64 `xorm:"INDEX"`
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EditedUnix timeutil.TimeStamp `xorm:"INDEX"`
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ContentText string `xorm:"LONGTEXT"`
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IsFirstCreated bool
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IsDeleted bool
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}
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// TableName provides the real table name
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func (m *ContentHistory) TableName() string {
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return "issue_content_history"
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}
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func init() {
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db.RegisterModel(new(ContentHistory))
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}
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// SaveIssueContentHistory save history
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func SaveIssueContentHistory(e db.Engine, posterID, issueID, commentID int64, editTime timeutil.TimeStamp, contentText string, isFirstCreated bool) error {
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ch := &ContentHistory{
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PosterID: posterID,
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IssueID: issueID,
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CommentID: commentID,
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ContentText: contentText,
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EditedUnix: editTime,
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IsFirstCreated: isFirstCreated,
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}
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_, err := e.Insert(ch)
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if err != nil {
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log.Error("can not save issue content history. err=%v", err)
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return err
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}
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// We only keep at most 20 history revisions now. It is enough in most cases.
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// If there is a special requirement to keep more, we can consider introducing a new setting option then, but not now.
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keepLimitedContentHistory(e, issueID, commentID, 20)
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return nil
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}
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// keepLimitedContentHistory keeps at most `limit` history revisions, it will hard delete out-dated revisions, sorting by revision interval
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// we can ignore all errors in this function, so we just log them
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func keepLimitedContentHistory(e db.Engine, issueID, commentID int64, limit int) {
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type IDEditTime struct {
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ID int64
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EditedUnix timeutil.TimeStamp
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}
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var res []*IDEditTime
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err := e.Select("id, edited_unix").Table("issue_content_history").
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Where(builder.Eq{"issue_id": issueID, "comment_id": commentID}).
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OrderBy("edited_unix ASC").
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Find(&res)
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if err != nil {
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log.Error("can not query content history for deletion, err=%v", err)
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return
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}
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if len(res) <= 1 {
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return
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}
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outDatedCount := len(res) - limit
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for outDatedCount > 0 {
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var indexToDelete int
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minEditedInterval := -1
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// find a history revision with minimal edited interval to delete
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for i := 1; i < len(res); i++ {
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editedInterval := int(res[i].EditedUnix - res[i-1].EditedUnix)
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if minEditedInterval == -1 || editedInterval < minEditedInterval {
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minEditedInterval = editedInterval
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indexToDelete = i
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}
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}
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if indexToDelete == 0 {
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break
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}
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// hard delete the found one
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_, err = e.Delete(&ContentHistory{ID: res[indexToDelete].ID})
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if err != nil {
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log.Error("can not delete out-dated content history, err=%v", err)
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break
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}
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res = append(res[:indexToDelete], res[indexToDelete+1:]...)
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outDatedCount--
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}
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}
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// QueryIssueContentHistoryEditedCountMap query related history count of each comment (comment_id = 0 means the main issue)
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// only return the count map for "edited" (history revision count > 1) issues or comments.
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func QueryIssueContentHistoryEditedCountMap(dbCtx context.Context, issueID int64) (map[int64]int, error) {
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type HistoryCountRecord struct {
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CommentID int64
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HistoryCount int
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}
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records := make([]*HistoryCountRecord, 0)
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err := db.GetEngine(dbCtx).Select("comment_id, COUNT(1) as history_count").
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Table("issue_content_history").
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Where(builder.Eq{"issue_id": issueID}).
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GroupBy("comment_id").
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Having("history_count > 1").
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Find(&records)
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if err != nil {
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log.Error("can not query issue content history count map. err=%v", err)
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return nil, err
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}
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res := map[int64]int{}
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for _, r := range records {
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res[r.CommentID] = r.HistoryCount
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}
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return res, nil
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}
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// IssueContentListItem the list for web ui
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type IssueContentListItem struct {
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UserID int64
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UserName string
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UserAvatarLink string
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HistoryID int64
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EditedUnix timeutil.TimeStamp
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IsFirstCreated bool
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IsDeleted bool
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}
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// FetchIssueContentHistoryList fetch list
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func FetchIssueContentHistoryList(dbCtx context.Context, issueID int64, commentID int64) ([]*IssueContentListItem, error) {
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res := make([]*IssueContentListItem, 0)
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err := db.GetEngine(dbCtx).Select("u.id as user_id, u.name as user_name,"+
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"h.id as history_id, h.edited_unix, h.is_first_created, h.is_deleted").
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Table([]string{"issue_content_history", "h"}).
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Join("LEFT", []string{"user", "u"}, "h.poster_id = u.id").
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Where(builder.Eq{"issue_id": issueID, "comment_id": commentID}).
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OrderBy("edited_unix DESC").
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Find(&res)
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if err != nil {
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log.Error("can not fetch issue content history list. err=%v", err)
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return nil, err
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}
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for _, item := range res {
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item.UserAvatarLink = avatars.GenerateUserAvatarFastLink(item.UserName, 0)
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}
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return res, nil
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}
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//SoftDeleteIssueContentHistory soft delete
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func SoftDeleteIssueContentHistory(dbCtx context.Context, historyID int64) error {
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if _, err := db.GetEngine(dbCtx).ID(historyID).Cols("is_deleted", "content_text").Update(&ContentHistory{
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IsDeleted: true,
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ContentText: "",
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}); err != nil {
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log.Error("failed to soft delete issue content history. err=%v", err)
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return err
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}
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return nil
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}
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// ErrIssueContentHistoryNotExist not exist error
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type ErrIssueContentHistoryNotExist struct {
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ID int64
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}
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// Error error string
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func (err ErrIssueContentHistoryNotExist) Error() string {
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return fmt.Sprintf("issue content history does not exist [id: %d]", err.ID)
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}
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// GetIssueContentHistoryByID get issue content history
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func GetIssueContentHistoryByID(dbCtx context.Context, id int64) (*ContentHistory, error) {
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h := &ContentHistory{}
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has, err := db.GetEngine(dbCtx).ID(id).Get(h)
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if err != nil {
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return nil, err
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} else if !has {
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return nil, ErrIssueContentHistoryNotExist{id}
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}
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return h, nil
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}
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// GetIssueContentHistoryAndPrev get a history and the previous non-deleted history (to compare)
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func GetIssueContentHistoryAndPrev(dbCtx context.Context, id int64) (history, prevHistory *ContentHistory, err error) {
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history = &ContentHistory{}
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has, err := db.GetEngine(dbCtx).ID(id).Get(history)
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if err != nil {
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log.Error("failed to get issue content history %v. err=%v", id, err)
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return nil, nil, err
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} else if !has {
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log.Error("issue content history does not exist. id=%v. err=%v", id, err)
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return nil, nil, &ErrIssueContentHistoryNotExist{id}
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}
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prevHistory = &ContentHistory{}
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has, err = db.GetEngine(dbCtx).Where(builder.Eq{"issue_id": history.IssueID, "comment_id": history.CommentID, "is_deleted": false}).
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And(builder.Lt{"edited_unix": history.EditedUnix}).
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OrderBy("edited_unix DESC").Limit(1).
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Get(prevHistory)
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if err != nil {
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log.Error("failed to get issue content history %v. err=%v", id, err)
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return nil, nil, err
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} else if !has {
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return history, nil, nil
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}
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return history, prevHistory, nil
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}
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