API: Add pull review endpoints (#11224)

* API: Added pull review read only endpoints

* Update Structs, move Conversion, Refactor

* refactor

* lint & co

* fix lint + refactor

* add new Review state, rm unessesary, refacotr loadAttributes, convert patch to diff

* add DeletePullReview

* add paggination

* draft1: Create & submit review

* fix lint

* fix lint

* impruve test

* DONT use GhostUser for loadReviewer

* expose comments_count of a PullReview

* infent GetCodeCommentsCount()

* fixes

* fix+impruve

* some nits

* Handle Ghosts 👻

* add TEST for GET apis

* complete TESTS

* add HTMLURL to PullReview responce

* code format as per @lafriks

* update swagger definition

* Update routers/api/v1/repo/pull_review.go

Co-authored-by: David Svantesson <davidsvantesson@gmail.com>

* add comments

Co-authored-by: Thomas Berger <loki@lokis-chaos.de>
Co-authored-by: David Svantesson <davidsvantesson@gmail.com>

routers/api/v1/api.go

@@ -500,7 +500,7 @@ func RegisterRoutes(m *macaron.Macaron) {
 	bind := binding.Bind
 
 	if setting.API.EnableSwagger {
-		m.Get("/swagger", misc.Swagger) //Render V1 by default
+		m.Get("/swagger", misc.Swagger) // Render V1 by default
 	}
 
 	m.Group("/v1", func() {
@@ -794,6 +794,20 @@ func RegisterRoutes(m *macaron.Macaron) {
 							Patch(reqToken(), reqRepoWriter(models.UnitTypePullRequests), bind(api.EditPullRequestOption{}), repo.EditPullRequest)
 						m.Combo("/merge").Get(repo.IsPullRequestMerged).
 							Post(reqToken(), mustNotBeArchived, bind(auth.MergePullRequestForm{}), repo.MergePullRequest)
+						m.Group("/reviews", func() {
+							m.Combo("").
+								Get(repo.ListPullReviews).
+								Post(reqToken(), bind(api.CreatePullReviewOptions{}), repo.CreatePullReview)
+							m.Group("/:id", func() {
+								m.Combo("").
+									Get(repo.GetPullReview).
+									Delete(reqToken(), repo.DeletePullReview).
+									Post(reqToken(), bind(api.SubmitPullReviewOptions{}), repo.SubmitPullReview)
+								m.Combo("/comments").
+									Get(repo.GetPullReviewComments)
+							})
+						})
+
 					})
 				}, mustAllowPulls, reqRepoReader(models.UnitTypeCode), context.ReferencesGitRepo(false))
 				m.Group("/statuses", func() {