Implement "conversation lock" for issue comments

custom/conf/app.ini.sample

@@ -69,6 +69,10 @@ MAX_FILES = 5
 ; List of prefixes used in Pull Request title to mark them as Work In Progress
 WORK_IN_PROGRESS_PREFIXES=WIP:,[WIP]
 
+[repository.issue]
+; List of reasons why a Pull Request or Issue can be locked
+LOCK_REASONS=Too heated,Off-topic,Resolved,Spam
+
 [ui]
 ; Number of repositories that are displayed on one explore page
 EXPLORE_PAGING_NUM = 20

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -71,6 +71,9 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 - `WORK_IN_PROGRESS_PREFIXES`: **WIP:,\[WIP\]**: List of prefixes used in Pull Request
  title to mark them as Work In Progress
 
+### Repository - Issue (`repository.issue`)
+- `LOCK_REASONS`: **Too heated,Off-topic,Resolved,Spam**: A list of reasons why a Pull Request or Issue can be locked
+
 ## UI (`ui`)
 
 - `EXPLORE_PAGING_NUM`: **20**: Number of repositories that are shown in one explore page.

docs/content/doc/features/comparison.en-us.md

@@ -81,7 +81,7 @@ _Symbols used in table:_
 | Related issues | ✘ | ✘ | ⁄ | ✘ | ✓ | ✘ | ✘ |
 | Confidential issues | ✘ | ✘ | ✘ | ✓ | ✓ | ✘ | ✘ |
 | Comment reactions | ✓ | ✘ | ✓ | ✓ | ✓ | ✘ | ✘ |
-| Lock Discussion | ✘ | ✘ | ✓ | ✓ | ✓ | ✘ | ✘ |
+| Lock Discussion | ✓ | ✘ | ✓ | ✓ | ✓ | ✘ | ✘ |
 | Batch issue handling | ✓ | ✘ | ✓ | ✓ | ✓ | ✘ | ✘ |
 | Issue Boards | ✘ | ✘ | ✘ | ✓ | ✓ | ✘ | ✘ |
 | Create new branches from issues | ✘ | ✘ | ✘ | ✓ | ✓ | ✘ | ✘ |

models/issue.go

@@ -57,6 +57,10 @@ type Issue struct {
 	Reactions        ReactionList  `xorm:"-"`
 	TotalTrackedTime int64         `xorm:"-"`
 	Assignees        []*User       `xorm:"-"`
+
+	// IsLocked limits commenting abilities to users on an issue
+	// with write access
+	IsLocked bool `xorm:"NOT NULL DEFAULT false"`
 }
 
 var (

models/issue_comment.go

@@ -80,6 +80,10 @@ const (
 	CommentTypeCode
 	// Reviews a pull request by giving general feedback
 	CommentTypeReview
+	// Lock an issue, giving only collaborators access
+	CommentTypeLock
+	// Unlocks a previously locked issue
+	CommentTypeUnlock
 )
 
 // CommentTag defines comment tag type

models/issue_lock.go

@@ -0,0 +1,51 @@
+// Copyright 2019 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 models
+
+// IssueLockOptions defines options for locking and/or unlocking an issue/PR
+type IssueLockOptions struct {
+	Doer   *User
+	Issue  *Issue
+	Reason string
+}
+
+// LockIssue locks an issue. This would limit commenting abilities to
+// users with write access to the repo
+func LockIssue(opts *IssueLockOptions) error {
+	return updateIssueLock(opts, true)
+}
+
+// UnlockIssue unlocks a previously locked issue.
+func UnlockIssue(opts *IssueLockOptions) error {
+	return updateIssueLock(opts, false)
+}
+
+func updateIssueLock(opts *IssueLockOptions, lock bool) error {
+	if opts.Issue.IsLocked == lock {
+		return nil
+	}
+
+	opts.Issue.IsLocked = lock
+
+	var commentType CommentType
+	if opts.Issue.IsLocked {
+		commentType = CommentTypeLock
+	} else {
+		commentType = CommentTypeUnlock
+	}
+
+	if err := UpdateIssueCols(opts.Issue, "is_locked"); err != nil {
+		return err
+	}
+
+	_, err := CreateComment(&CreateCommentOptions{
+		Doer:    opts.Doer,
+		Issue:   opts.Issue,
+		Repo:    opts.Issue.Repo,
+		Type:    commentType,
+		Content: opts.Reason,
+	})
+	return err
+}

models/migrations/migrations.go

@@ -213,6 +213,8 @@ var migrations = []Migration{
 	NewMigration("rename repo is_bare to repo is_empty", renameRepoIsBareToIsEmpty),
 	// v79 -> v80
 	NewMigration("add can close issues via commit in any branch", addCanCloseIssuesViaCommitInAnyBranch),
+	// v80 -> v81
+	NewMigration("add is locked to issues", addIsLockedToIssues),
 }
 
 // Migrate database to current version

models/migrations/v80.go

@@ -0,0 +1,18 @@
+// Copyright 2019 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 migrations
+
+import "github.com/go-xorm/xorm"
+
+func addIsLockedToIssues(x *xorm.Engine) error {
+	// Issue see models/issue.go
+	type Issue struct {
+		ID       int64 `xorm:"pk autoincr"`
+		IsLocked bool  `xorm:"NOT NULL DEFAULT false"`
+	}
+
+	return x.Sync2(new(Issue))
+
+}

modules/auth/repo_form.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/routers/utils"
 
 	"github.com/Unknwon/com"
@@ -308,6 +309,32 @@ func (f *ReactionForm) Validate(ctx *macaron.Context, errs binding.Errors) bindi
 	return validate(errs, ctx.Data, f, ctx.Locale)
 }
 
+// IssueLockForm form for locking an issue
+type IssueLockForm struct {
+	Reason string `binding:"Required"`
+}
+
+// Validate validates the fields
+func (i *IssueLockForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
+	return validate(errs, ctx.Data, i, ctx.Locale)
+}
+
+// HasValidReason checks to make sure that the reason submitted in
+// the form matches any of the values in the config
+func (i IssueLockForm) HasValidReason() bool {
+	if strings.TrimSpace(i.Reason) == "" {
+		return true
+	}
+
+	for _, v := range setting.Repository.Issue.LockReasons {
+		if v == i.Reason {
+			return true
+		}
+	}
+
+	return false
+}
+
 //    _____  .__.__                   __
 //   /     \ |__|  |   ____   _______/  |_  ____   ____   ____
 //  /  \ /  \|  |  | _/ __ \ /  ___/\   __\/  _ \ /    \_/ __ \

modules/auth/repo_form_test.go

@@ -7,6 +7,7 @@ package auth
 import (
 	"testing"
 
+	"code.gitea.io/gitea/modules/setting"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -39,3 +40,27 @@ func TestSubmitReviewForm_IsEmpty(t *testing.T) {
 		assert.Equal(t, v.expected, v.form.HasEmptyContent())
 	}
 }
+
+func TestIssueLock_HasValidReason(t *testing.T) {
+
+	// Init settings
+	_ = setting.Repository
+
+	cases := []struct {
+		form     IssueLockForm
+		expected bool
+	}{
+		{IssueLockForm{""}, true}, // an empty reason is accepted
+		{IssueLockForm{"Off-topic"}, true},
+		{IssueLockForm{"Too heated"}, true},
+		{IssueLockForm{"Spam"}, true},
+		{IssueLockForm{"Resolved"}, true},
+
+		{IssueLockForm{"ZZZZ"}, false},
+		{IssueLockForm{"I want to lock this issue"}, false},
+	}
+
+	for _, v := range cases {
+		assert.Equal(t, v.expected, v.form.HasValidReason())
+	}
+}

modules/setting/setting.go

@@ -227,6 +227,11 @@ var (
 		PullRequest struct {
 			WorkInProgressPrefixes []string
 		} `ini:"repository.pull-request"`
+
+		// Issue Setting
+		Issue struct {
+			LockReasons []string
+		} `ini:"repository.issue"`
 	}{
 		AnsiCharset:                             "",
 		ForcePrivate:                            false,
@@ -279,6 +284,13 @@ var (
 		}{
 			WorkInProgressPrefixes: []string{"WIP:", "[WIP]"},
 		},
+
+		// Issue settings
+		Issue: struct {
+			LockReasons []string
+		}{
+			LockReasons: strings.Split("Too heated,Off-topic,Spam,Resolved", ","),
+		},
 	}
 	RepoRootPath string
 	ScriptType   = "bash"

options/locale/locale_en-US.ini

@@ -780,6 +780,25 @@ issues.attachment.open_tab = `Click to see "%s" in a new tab`
 issues.attachment.download = `Click to download "%s"`
 issues.subscribe = Subscribe
 issues.unsubscribe = Unsubscribe
+issues.lock = Lock conversation
+issues.unlock = Unlock conversation
+issues.lock.unknown_reason = Cannot lock an issue with an unknown reason.
+issues.lock_duplicate = An issue cannot be locked twice.
+issues.unlock_error = Cannot unlock an issue that is not locked.
+issues.lock_with_reason = "locked as <strong>%s</strong> and limited conversation to collaborators %s"
+issues.lock_no_reason = "locked and limited conversation to collaborators %s"
+issues.unlock_comment = "unlocked this conversation %s"
+issues.lock_confirm = Lock
+issues.unlock_confirm = Unlock
+issues.lock.notice_1 = - Other users can’t add new comments to this issue.
+issues.lock.notice_2 = - You and other collaborators with access to this repository can still leave comments that others can see.
+issues.lock.notice_3 = - You can always unlock this issue again in the future.
+issues.unlock.notice_1 = - Everyone would be able to comment on this issue once more.
+issues.unlock.notice_2 = - You can always lock this issue again in the future.
+issues.lock.reason = Reason for locking
+issues.lock.title = Lock conversation on this issue.
+issues.unlock.title = Unlock conversation on this issue.
+issues.comment_on_locked = You cannot comment on a locked issue.
 issues.tracker = Time Tracker
 issues.start_tracking_short = Start
 issues.start_tracking = Start Time Tracking

routers/api/v1/repo/issue_comment.go

@@ -5,6 +5,7 @@
 package repo
 
 import (
+	"errors"
 	"time"
 
 	"code.gitea.io/gitea/models"
@@ -169,6 +170,11 @@ func CreateIssueComment(ctx *context.APIContext, form api.CreateIssueCommentOpti
 		return
 	}
 
+	if issue.IsLocked && !ctx.Repo.CanWrite(models.UnitTypeIssues) && !ctx.User.IsAdmin {
+		ctx.Error(403, "CreateIssueComment", errors.New(ctx.Tr("repo.issues.comment_on_locked")))
+		return
+	}
+
 	comment, err := models.CreateIssueComment(ctx.User, ctx.Repo.Repository, issue, form.Body, nil)
 	if err != nil {
 		ctx.Error(500, "CreateIssueComment", err)

routers/repo/issue.go

@@ -57,6 +57,23 @@ var (
 	}
 )
 
+// MustAllowUserComment checks to make sure if an issue is locked.
+// If locked and user has permissions to write to the repository,
+// then the comment is allowed, else it is blocked
+func MustAllowUserComment(ctx *context.Context) {
+
+	issue := GetActionIssue(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	if issue.IsLocked && !ctx.Repo.CanWrite(models.UnitTypeIssues) && !ctx.User.IsAdmin {
+		ctx.Flash.Error(ctx.Tr("repo.issues.comment_on_locked"))
+		ctx.Redirect(issue.HTMLURL())
+		return
+	}
+}
+
 // MustEnableIssues check if repository enable internal issues
 func MustEnableIssues(ctx *context.Context) {
 	if !ctx.Repo.CanRead(models.UnitTypeIssues) &&
@@ -898,6 +915,9 @@ func ViewIssue(ctx *context.Context) {
 	ctx.Data["SignInLink"] = setting.AppSubURL + "/user/login?redirect_to=" + ctx.Data["Link"].(string)
 	ctx.Data["IsIssuePoster"] = ctx.IsSigned && issue.IsPoster(ctx.User.ID)
 	ctx.Data["IsIssueWriter"] = ctx.Repo.CanWriteIssuesOrPulls(issue.IsPull)
+	ctx.Data["IsRepoAdmin"] = ctx.IsSigned && (ctx.Repo.IsAdmin() || ctx.User.IsAdmin)
+	ctx.Data["IsRepoIssuesWriter"] = ctx.IsSigned && (ctx.Repo.CanWrite(models.UnitTypeIssues) || ctx.User.IsAdmin)
+	ctx.Data["LockReasons"] = setting.Repository.Issue.LockReasons
 	ctx.HTML(200, tplIssueView)
 }
 
@@ -1118,6 +1138,11 @@ func NewComment(ctx *context.Context, form auth.CreateCommentForm) {
 
 	if !ctx.IsSigned || (ctx.User.ID != issue.PosterID && !ctx.Repo.CanReadIssuesOrPulls(issue.IsPull)) {
 		ctx.Error(403)
+	}
+
+	if issue.IsLocked && !ctx.Repo.CanWrite(models.UnitTypeIssues) && !ctx.User.IsAdmin {
+		ctx.Flash.Error(ctx.Tr("repo.issues.comment_on_locked"))
+		ctx.Redirect(issue.HTMLURL(), http.StatusSeeOther)
 		return
 	}
 

routers/repo/issue_lock.go

@@ -0,0 +1,71 @@
+// Copyright 2019 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 repo
+
+import (
+	"net/http"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/auth"
+	"code.gitea.io/gitea/modules/context"
+)
+
+// LockIssue locks an issue. This would limit commenting abilities to
+// users with write access to the repo.
+func LockIssue(ctx *context.Context, form auth.IssueLockForm) {
+
+	issue := GetActionIssue(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	if issue.IsLocked {
+		ctx.Flash.Error(ctx.Tr("repo.issues.lock_duplicate"))
+		ctx.Redirect(issue.HTMLURL())
+		return
+	}
+
+	if !form.HasValidReason() {
+		ctx.Flash.Error(ctx.Tr("repo.issues.lock.unknown_reason"))
+		ctx.Redirect(issue.HTMLURL())
+		return
+	}
+
+	if err := models.LockIssue(&models.IssueLockOptions{
+		Doer:   ctx.User,
+		Issue:  issue,
+		Reason: form.Reason,
+	}); err != nil {
+		ctx.ServerError("LockIssue", err)
+		return
+	}
+
+	ctx.Redirect(issue.HTMLURL(), http.StatusSeeOther)
+}
+
+// UnlockIssue unlocks a previously locked issue.
+func UnlockIssue(ctx *context.Context) {
+
+	issue := GetActionIssue(ctx)
+	if ctx.Written() {
+		return
+	}
+
+	if !issue.IsLocked {
+		ctx.Flash.Error(ctx.Tr("repo.issues.unlock_error"))
+		ctx.Redirect(issue.HTMLURL())
+		return
+	}
+
+	if err := models.UnlockIssue(&models.IssueLockOptions{
+		Doer:  ctx.User,
+		Issue: issue,
+	}); err != nil {
+		ctx.ServerError("UnlockIssue", err)
+		return
+	}
+
+	ctx.Redirect(issue.HTMLURL(), http.StatusSeeOther)
+}