[maint] api for PR metadata added (#319)

internal/api/handler/pullreq/pr_metadata.go

@@ -0,0 +1,41 @@
+// Copyright 2022 Harness Inc. All rights reserved.
+// Use of this source code is governed by the Polyform Free Trial License
+// that can be found in the LICENSE.md file for this repository.
+
+package pullreq
+
+import (
+	"net/http"
+
+	"github.com/harness/gitness/internal/api/controller/pullreq"
+	"github.com/harness/gitness/internal/api/render"
+	"github.com/harness/gitness/internal/api/request"
+)
+
+// HandleMetadata returns a http.HandlerFunc that returns PR metadata.
+func HandleMetadata(pullreqCtrl *pullreq.Controller) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+		session, _ := request.AuthSessionFrom(ctx)
+
+		repoRef, err := request.GetRepoRefFromPath(r)
+		if err != nil {
+			render.TranslatedUserError(w, err)
+			return
+		}
+
+		pullreqNumber, err := request.GetPullReqNumberFromPath(r)
+		if err != nil {
+			render.TranslatedUserError(w, err)
+			return
+		}
+
+		pr, err := pullreqCtrl.Find(ctx, session, repoRef, pullreqNumber)
+		if err != nil {
+			render.TranslatedUserError(w, err)
+			return
+		}
+
+		render.JSON(w, http.StatusOK, pr.Stats)
+	}
+}

internal/api/openapi/pullreq.go

@@ -441,7 +441,7 @@ func pullReqOperations(reflector *openapi3.Reflector) {
 	opMetaData.WithTags("pullreq")
 	opMetaData.WithMapOfAnything(map[string]interface{}{"operationId": "pullReqMetaData"})
 	_ = reflector.SetRequest(&opMetaData, new(pullReqRequest), http.MethodGet)
-	_ = reflector.SetStringResponse(&opMetaData, http.StatusOK, "text/plain")
+	_ = reflector.SetJSONResponse(&opMetaData, new(types.PullReqStats), http.StatusOK)
 	_ = reflector.SetJSONResponse(&opMetaData, new(usererror.Error), http.StatusInternalServerError)
 	_ = reflector.SetJSONResponse(&opMetaData, new(usererror.Error), http.StatusUnauthorized)
 	_ = reflector.SetJSONResponse(&opMetaData, new(usererror.Error), http.StatusForbidden)

internal/router/api.go

@@ -270,6 +270,7 @@ func SetupPullReq(r chi.Router, pullreqCtrl *pullreq.Controller) {
 			r.Post("/merge", handlerpullreq.HandleMerge(pullreqCtrl))
 			r.Get("/diff", handlerpullreq.HandleRawDiff(pullreqCtrl))
 			r.Get("/commits", handlerpullreq.HandleCommits(pullreqCtrl))
+			r.Get("/metadata", handlerpullreq.HandleMetadata(pullreqCtrl))
 		})
 	})
 }