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forgejo-federation/routers/api/v1/repo/issue_comment.go
Lunny Xiao bd820aa9c5
Add context cache as a request level cache (#22294) 
To avoid duplicated load of the same data in an HTTP request, we can set
a context cache to do that. i.e. Some pages may load a user from a
database with the same id in different areas on the same page. But the
code is hidden in two different deep logic. How should we share the
user? As a result of this PR, now if both entry functions accept
`context.Context` as the first parameter and we just need to refactor
`GetUserByID` to reuse the user from the context cache. Then it will not
be loaded twice on an HTTP request.

But of course, sometimes we would like to reload an object from the
database, that's why `RemoveContextData` is also exposed.

The core context cache is here. It defines a new context
```go
type cacheContext struct {
	ctx  context.Context
	data map[any]map[any]any
        lock sync.RWMutex
}

var cacheContextKey = struct{}{}

func WithCacheContext(ctx context.Context) context.Context {
	return context.WithValue(ctx, cacheContextKey, &cacheContext{
		ctx:  ctx,
		data: make(map[any]map[any]any),
	})
}
```

Then you can use the below 4 methods to read/write/del the data within
the same context.

```go
func GetContextData(ctx context.Context, tp, key any) any
func SetContextData(ctx context.Context, tp, key, value any)
func RemoveContextData(ctx context.Context, tp, key any)
func GetWithContextCache[T any](ctx context.Context, cacheGroupKey string, cacheTargetID any, f func() (T, error)) (T, error)
```

Then let's take a look at how `system.GetString` implement it.

```go
func GetSetting(ctx context.Context, key string) (string, error) {
	return cache.GetWithContextCache(ctx, contextCacheKey, key, func() (string, error) {
		return cache.GetString(genSettingCacheKey(key), func() (string, error) {
			res, err := GetSettingNoCache(ctx, key)
			if err != nil {
				return "", err
			}
			return res.SettingValue, nil
		})
	})
}
```

First, it will check if context data include the setting object with the
key. If not, it will query from the global cache which may be memory or
a Redis cache. If not, it will get the object from the database. In the
end, if the object gets from the global cache or database, it will be
set into the context cache.

An object stored in the context cache will only be destroyed after the
context disappeared.
2023-02-15 21:37:34 +08:00

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// Copyright 2015 The Gogs Authors. All rights reserved.
// Copyright 2020 The Gitea Authors.
// SPDX-License-Identifier: MIT
package repo
import (
stdCtx "context"
"errors"
"net/http"
issues_model "code.gitea.io/gitea/models/issues"
access_model "code.gitea.io/gitea/models/perm/access"
repo_model "code.gitea.io/gitea/models/repo"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/context"
api "code.gitea.io/gitea/modules/structs"
"code.gitea.io/gitea/modules/web"
"code.gitea.io/gitea/routers/api/v1/utils"
"code.gitea.io/gitea/services/convert"
issue_service "code.gitea.io/gitea/services/issue"
)
// ListIssueComments list all the comments of an issue
func ListIssueComments(ctx *context.APIContext) {
// swagger:operation GET /repos/{owner}/{repo}/issues/{index}/comments issue issueGetComments
// ---
// summary: List all comments on an issue
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: index
// in: path
// description: index of the issue
// type: integer
// format: int64
// required: true
// - name: since
// in: query
// description: if provided, only comments updated since the specified time are returned.
// type: string
// format: date-time
// - name: before
// in: query
// description: if provided, only comments updated before the provided time are returned.
// type: string
// format: date-time
// responses:
// "200":
// "$ref": "#/responses/CommentList"
before, since, err := context.GetQueryBeforeSince(ctx.Context)
if err != nil {
ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
return
}
issue, err := issues_model.GetIssueByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
if err != nil {
ctx.Error(http.StatusInternalServerError, "GetRawIssueByIndex", err)
return
}
issue.Repo = ctx.Repo.Repository
opts := &issues_model.FindCommentsOptions{
IssueID: issue.ID,
Since: since,
Before: before,
Type: issues_model.CommentTypeComment,
}
comments, err := issues_model.FindComments(ctx, opts)
if err != nil {
ctx.Error(http.StatusInternalServerError, "FindComments", err)
return
}
totalCount, err := issues_model.CountComments(opts)
if err != nil {
ctx.InternalServerError(err)
return
}
if err := issues_model.CommentList(comments).LoadPosters(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "LoadPosters", err)
return
}
if err := issues_model.CommentList(comments).LoadAttachments(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "LoadAttachments", err)
return
}
apiComments := make([]*api.Comment, len(comments))
for i, comment := range comments {
comment.Issue = issue
apiComments[i] = convert.ToComment(ctx, comments[i])
}
ctx.SetTotalCountHeader(totalCount)
ctx.JSON(http.StatusOK, &apiComments)
}
// ListIssueCommentsAndTimeline list all the comments and events of an issue
func ListIssueCommentsAndTimeline(ctx *context.APIContext) {
// swagger:operation GET /repos/{owner}/{repo}/issues/{index}/timeline issue issueGetCommentsAndTimeline
// ---
// summary: List all comments and events on an issue
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: index
// in: path
// description: index of the issue
// type: integer
// format: int64
// required: true
// - name: since
// in: query
// description: if provided, only comments updated since the specified time are returned.
// type: string
// format: date-time
// - name: page
// in: query
// description: page number of results to return (1-based)
// type: integer
// - name: limit
// in: query
// description: page size of results
// type: integer
// - name: before
// in: query
// description: if provided, only comments updated before the provided time are returned.
// type: string
// format: date-time
// responses:
// "200":
// "$ref": "#/responses/TimelineList"
before, since, err := context.GetQueryBeforeSince(ctx.Context)
if err != nil {
ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
return
}
issue, err := issues_model.GetIssueByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
if err != nil {
ctx.Error(http.StatusInternalServerError, "GetRawIssueByIndex", err)
return
}
issue.Repo = ctx.Repo.Repository
opts := &issues_model.FindCommentsOptions{
ListOptions: utils.GetListOptions(ctx),
IssueID: issue.ID,
Since: since,
Before: before,
Type: issues_model.CommentTypeUnknown,
}
comments, err := issues_model.FindComments(ctx, opts)
if err != nil {
ctx.Error(http.StatusInternalServerError, "FindComments", err)
return
}
if err := issues_model.CommentList(comments).LoadPosters(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "LoadPosters", err)
return
}
var apiComments []*api.TimelineComment
for _, comment := range comments {
if comment.Type != issues_model.CommentTypeCode && isXRefCommentAccessible(ctx, ctx.Doer, comment, issue.RepoID) {
comment.Issue = issue
apiComments = append(apiComments, convert.ToTimelineComment(ctx, comment, ctx.Doer))
}
}
ctx.SetTotalCountHeader(int64(len(apiComments)))
ctx.JSON(http.StatusOK, &apiComments)
}
func isXRefCommentAccessible(ctx stdCtx.Context, user *user_model.User, c *issues_model.Comment, issueRepoID int64) bool {
// Remove comments that the user has no permissions to see
if issues_model.CommentTypeIsRef(c.Type) && c.RefRepoID != issueRepoID && c.RefRepoID != 0 {
var err error
// Set RefRepo for description in template
c.RefRepo, err = repo_model.GetRepositoryByID(ctx, c.RefRepoID)
if err != nil {
return false
}
perm, err := access_model.GetUserRepoPermission(ctx, c.RefRepo, user)
if err != nil {
return false
}
if !perm.CanReadIssuesOrPulls(c.RefIsPull) {
return false
}
}
return true
}
// ListRepoIssueComments returns all issue-comments for a repo
func ListRepoIssueComments(ctx *context.APIContext) {
// swagger:operation GET /repos/{owner}/{repo}/issues/comments issue issueGetRepoComments
// ---
// summary: List all comments in a repository
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: since
// in: query
// description: if provided, only comments updated since the provided time are returned.
// type: string
// format: date-time
// - name: before
// in: query
// description: if provided, only comments updated before the provided time are returned.
// type: string
// format: date-time
// - name: page
// in: query
// description: page number of results to return (1-based)
// type: integer
// - name: limit
// in: query
// description: page size of results
// type: integer
// responses:
// "200":
// "$ref": "#/responses/CommentList"
before, since, err := context.GetQueryBeforeSince(ctx.Context)
if err != nil {
ctx.Error(http.StatusUnprocessableEntity, "GetQueryBeforeSince", err)
return
}
opts := &issues_model.FindCommentsOptions{
ListOptions: utils.GetListOptions(ctx),
RepoID: ctx.Repo.Repository.ID,
Type: issues_model.CommentTypeComment,
Since: since,
Before: before,
}
comments, err := issues_model.FindComments(ctx, opts)
if err != nil {
ctx.Error(http.StatusInternalServerError, "FindComments", err)
return
}
totalCount, err := issues_model.CountComments(opts)
if err != nil {
ctx.InternalServerError(err)
return
}
if err = issues_model.CommentList(comments).LoadPosters(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "LoadPosters", err)
return
}
apiComments := make([]*api.Comment, len(comments))
if err := issues_model.CommentList(comments).LoadIssues(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "LoadIssues", err)
return
}
if err := issues_model.CommentList(comments).LoadPosters(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "LoadPosters", err)
return
}
if err := issues_model.CommentList(comments).LoadAttachments(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "LoadAttachments", err)
return
}
if _, err := issues_model.CommentList(comments).Issues().LoadRepositories(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "LoadRepositories", err)
return
}
for i := range comments {
apiComments[i] = convert.ToComment(ctx, comments[i])
}
ctx.SetTotalCountHeader(totalCount)
ctx.JSON(http.StatusOK, &apiComments)
}
// CreateIssueComment create a comment for an issue
func CreateIssueComment(ctx *context.APIContext) {
// swagger:operation POST /repos/{owner}/{repo}/issues/{index}/comments issue issueCreateComment
// ---
// summary: Add a comment to an issue
// consumes:
// - application/json
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: index
// in: path
// description: index of the issue
// type: integer
// format: int64
// required: true
// - name: body
// in: body
// schema:
// "$ref": "#/definitions/CreateIssueCommentOption"
// responses:
// "201":
// "$ref": "#/responses/Comment"
// "403":
// "$ref": "#/responses/forbidden"
form := web.GetForm(ctx).(*api.CreateIssueCommentOption)
issue, err := issues_model.GetIssueByIndex(ctx.Repo.Repository.ID, ctx.ParamsInt64(":index"))
if err != nil {
ctx.Error(http.StatusInternalServerError, "GetIssueByIndex", err)
return
}
if issue.IsLocked && !ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull) && !ctx.Doer.IsAdmin {
ctx.Error(http.StatusForbidden, "CreateIssueComment", errors.New(ctx.Tr("repo.issues.comment_on_locked")))
return
}
comment, err := issue_service.CreateIssueComment(ctx, ctx.Doer, ctx.Repo.Repository, issue, form.Body, nil)
if err != nil {
ctx.Error(http.StatusInternalServerError, "CreateIssueComment", err)
return
}
ctx.JSON(http.StatusCreated, convert.ToComment(ctx, comment))
}
// GetIssueComment Get a comment by ID
func GetIssueComment(ctx *context.APIContext) {
// swagger:operation GET /repos/{owner}/{repo}/issues/comments/{id} issue issueGetComment
// ---
// summary: Get a comment
// consumes:
// - application/json
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: id
// in: path
// description: id of the comment
// type: integer
// format: int64
// required: true
// responses:
// "200":
// "$ref": "#/responses/Comment"
// "204":
// "$ref": "#/responses/empty"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
comment, err := issues_model.GetCommentByID(ctx, ctx.ParamsInt64(":id"))
if err != nil {
if issues_model.IsErrCommentNotExist(err) {
ctx.NotFound(err)
} else {
ctx.Error(http.StatusInternalServerError, "GetCommentByID", err)
}
return
}
if err = comment.LoadIssue(ctx); err != nil {
ctx.InternalServerError(err)
return
}
if comment.Issue.RepoID != ctx.Repo.Repository.ID {
ctx.Status(http.StatusNotFound)
return
}
if comment.Type != issues_model.CommentTypeComment {
ctx.Status(http.StatusNoContent)
return
}
if err := comment.LoadPoster(ctx); err != nil {
ctx.Error(http.StatusInternalServerError, "comment.LoadPoster", err)
return
}
ctx.JSON(http.StatusOK, convert.ToComment(ctx, comment))
}
// EditIssueComment modify a comment of an issue
func EditIssueComment(ctx *context.APIContext) {
// swagger:operation PATCH /repos/{owner}/{repo}/issues/comments/{id} issue issueEditComment
// ---
// summary: Edit a comment
// consumes:
// - application/json
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: id
// in: path
// description: id of the comment to edit
// type: integer
// format: int64
// required: true
// - name: body
// in: body
// schema:
// "$ref": "#/definitions/EditIssueCommentOption"
// responses:
// "200":
// "$ref": "#/responses/Comment"
// "204":
// "$ref": "#/responses/empty"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
form := web.GetForm(ctx).(*api.EditIssueCommentOption)
editIssueComment(ctx, *form)
}
// EditIssueCommentDeprecated modify a comment of an issue
func EditIssueCommentDeprecated(ctx *context.APIContext) {
// swagger:operation PATCH /repos/{owner}/{repo}/issues/{index}/comments/{id} issue issueEditCommentDeprecated
// ---
// summary: Edit a comment
// deprecated: true
// consumes:
// - application/json
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: index
// in: path
// description: this parameter is ignored
// type: integer
// required: true
// - name: id
// in: path
// description: id of the comment to edit
// type: integer
// format: int64
// required: true
// - name: body
// in: body
// schema:
// "$ref": "#/definitions/EditIssueCommentOption"
// responses:
// "200":
// "$ref": "#/responses/Comment"
// "204":
// "$ref": "#/responses/empty"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
form := web.GetForm(ctx).(*api.EditIssueCommentOption)
editIssueComment(ctx, *form)
}
func editIssueComment(ctx *context.APIContext, form api.EditIssueCommentOption) {
comment, err := issues_model.GetCommentByID(ctx, ctx.ParamsInt64(":id"))
if err != nil {
if issues_model.IsErrCommentNotExist(err) {
ctx.NotFound(err)
} else {
ctx.Error(http.StatusInternalServerError, "GetCommentByID", err)
}
return
}
if !ctx.IsSigned || (ctx.Doer.ID != comment.PosterID && !ctx.Repo.IsAdmin()) {
ctx.Status(http.StatusForbidden)
return
}
if comment.Type != issues_model.CommentTypeComment && comment.Type != issues_model.CommentTypeReview && comment.Type != issues_model.CommentTypeCode {
ctx.Status(http.StatusNoContent)
return
}
oldContent := comment.Content
comment.Content = form.Body
if err := issue_service.UpdateComment(ctx, comment, ctx.Doer, oldContent); err != nil {
ctx.Error(http.StatusInternalServerError, "UpdateComment", err)
return
}
ctx.JSON(http.StatusOK, convert.ToComment(ctx, comment))
}
// DeleteIssueComment delete a comment from an issue
func DeleteIssueComment(ctx *context.APIContext) {
// swagger:operation DELETE /repos/{owner}/{repo}/issues/comments/{id} issue issueDeleteComment
// ---
// summary: Delete a comment
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: id
// in: path
// description: id of comment to delete
// type: integer
// format: int64
// required: true
// responses:
// "204":
// "$ref": "#/responses/empty"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
deleteIssueComment(ctx)
}
// DeleteIssueCommentDeprecated delete a comment from an issue
func DeleteIssueCommentDeprecated(ctx *context.APIContext) {
// swagger:operation DELETE /repos/{owner}/{repo}/issues/{index}/comments/{id} issue issueDeleteCommentDeprecated
// ---
// summary: Delete a comment
// deprecated: true
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: index
// in: path
// description: this parameter is ignored
// type: integer
// required: true
// - name: id
// in: path
// description: id of comment to delete
// type: integer
// format: int64
// required: true
// responses:
// "204":
// "$ref": "#/responses/empty"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
deleteIssueComment(ctx)
}
func deleteIssueComment(ctx *context.APIContext) {
comment, err := issues_model.GetCommentByID(ctx, ctx.ParamsInt64(":id"))
if err != nil {
if issues_model.IsErrCommentNotExist(err) {
ctx.NotFound(err)
} else {
ctx.Error(http.StatusInternalServerError, "GetCommentByID", err)
}
return
}
if !ctx.IsSigned || (ctx.Doer.ID != comment.PosterID && !ctx.Repo.IsAdmin()) {
ctx.Status(http.StatusForbidden)
return
} else if comment.Type != issues_model.CommentTypeComment {
ctx.Status(http.StatusNoContent)
return
}
if err = issue_service.DeleteComment(ctx, ctx.Doer, comment); err != nil {
ctx.Error(http.StatusInternalServerError, "DeleteCommentByID", err)
return
}
ctx.Status(http.StatusNoContent)
}
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