Migrate reviews when migrating repository from github (#9463)

* fix typo

* Migrate reviews when migrating repository from github

* fix lint

* Added test and migration when external user login

* fix test

* fix commented state

* Some improvements

* fix bug when get pull request and ref original author on code comments

* Fix migrated line; Added comment for review

* Don't load all pull requests attributes

* Fix typo

* wrong change copy head

* fix tests

* fix reactions

* Fix test

* fix fmt

* fix review comment reactions

3 files changed, 46 insertions, 0 deletions

diff --git a/modules/migrations/base/downloader.go b/modules/migrations/base/downloader.go
index 87ade5c02e..5de8c9513b 100644
--- a/modules/migrations/base/downloader.go
+++ b/modules/migrations/base/downloader.go
@@ -23,6 +23,7 @@ type Downloader interface {
 	GetIssues(page, perPage int) ([]*Issue, bool, error)
 	GetComments(issueNumber int64) ([]*Comment, error)
 	GetPullRequests(page, perPage int) ([]*PullRequest, error)
+	GetReviews(pullRequestNumber int64) ([]*Review, error)
 }
 
 // DownloaderFactory defines an interface to match a downloader implementation and create a downloader
diff --git a/modules/migrations/base/review.go b/modules/migrations/base/review.go
new file mode 100644
index 0000000000..8051fed653
--- /dev/null
+++ b/modules/migrations/base/review.go
@@ -0,0 +1,44 @@
+// 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 base
+
+import "time"
+
+// enumerate all review states
+const (
+	ReviewStatePending          = "PENDING"
+	ReviewStateApproved         = "APPROVED"
+	ReviewStateChangesRequested = "CHANGES_REQUESTED"
+	ReviewStateCommented        = "COMMENTED"
+)
+
+// Review is a standard review information
+type Review struct {
+	ID           int64
+	IssueIndex   int64
+	ReviewerID   int64
+	ReviewerName string
+	Official     bool
+	CommitID     string
+	Content      string
+	CreatedAt    time.Time
+	State        string // PENDING, APPROVED, REQUEST_CHANGES, or COMMENT
+	Comments     []*ReviewComment
+}
+
+// ReviewComment represents a review comment
+type ReviewComment struct {
+	ID        int64
+	InReplyTo int64
+	Content   string
+	TreePath  string
+	DiffHunk  string
+	Position  int
+	CommitID  string
+	PosterID  int64
+	Reactions []*Reaction
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
diff --git a/modules/migrations/base/uploader.go b/modules/migrations/base/uploader.go
index 257c7a2909..85ad60fe0e 100644
--- a/modules/migrations/base/uploader.go
+++ b/modules/migrations/base/uploader.go
@@ -17,6 +17,7 @@ type Uploader interface {
 	CreateIssues(issues ...*Issue) error
 	CreateComments(comments ...*Comment) error
 	CreatePullRequests(prs ...*PullRequest) error
+	CreateReviews(reviews ...*Review) error
 	Rollback() error
 	Close()
 }