Refracto webhook

src/backend/controllers/webhook.go

@@ -2,87 +2,58 @@ package controllers
 
 import (
 	"bytes"
-	"crypto/hmac"
 	"io/ioutil"
+	"net/http"
 
 	hmacService "git.sebclem.fr/sebclem/renovate-manager/services/hmac"
+	giteaService "git.sebclem.fr/sebclem/renovate-manager/services/webhook/gitea"
 	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
 )
 
-type WebhookController struct{}
+type WebhookController struct {
+	WebhookSecret    string
+	RenovateUsername string
+}
 
-func (ctl WebhookController) HandleGiteaWebhook(c *gin.Context) {
+func (ctrl WebhookController) HandleGiteaWebhook(c *gin.Context) {
 	r := c.Request
 	signature := r.Header.Get("X-Gitea-Signature")
 
 	body, err := ioutil.ReadAll(r.Body)
 	if err != nil {
-		c.AbortWithStatus(500)
+		c.AbortWithStatus(http.StatusInternalServerError)
 		return
 	}
 
-	expectedSignature := hmacService.CalculateHMAC("test", body)
-
-	if signature == "" || !hmac.Equal([]byte(signature), []byte(expectedSignature)) {
-		logrus.Error("Signature missmatch, Abort !")
-		c.AbortWithStatus(401)
+	if !hmacService.CompareSignature(body, signature, ctrl.WebhookSecret) {
+		c.AbortWithStatus(http.StatusUnauthorized)
 		return
 	}
 
-	// Reset the request body so it can be Bind to json
+	// Reset the request body so it can be read again by BindJSON
 	c.Request.Body = ioutil.NopCloser(bytes.NewBuffer(body))
 
 	switch r.Header.Get("X-Gitea-Event") {
 	case "push":
-		logrus.Info("Received PUSH webhook")
-	case "create":
-		logrus.Info("Received CREATE webhook")
-	case "delete":
-		logrus.Info("Received DELETE webhook")
-	case "issues":
-		logrus.Info("Received ISSUES webhook")
+		logrus.Debug("Received PUSH webhook")
 	case "issue_comment":
-		logrus.Info("Received ISSUE_COMMENT webhook")
-	case "pull_request":
-		logrus.Info("Received PULL_REQUEST webhook")
-		var data PullRequestWebhook
+		logrus.Debug("Received ISSUE_COMMENT webhook")
+		var data giteaService.IssueComentWebhook
 		if err := c.BindJSON(&data); err == nil {
-			logrus.Info("All good")
+			giteaService.HandleGiteaIssueComment(data, ctrl.RenovateUsername)
+			c.String(201, "")
+		} else {
+			logrus.Error("Fail to parse json")
+		}
+	case "pull_request":
+		logrus.Debug("Received PULL_REQUEST webhook")
+		var data giteaService.PullRequestWebhook
+		if err := c.BindJSON(&data); err == nil {
+			giteaService.HandleGiteaPullRequest(data, ctrl.RenovateUsername)
 			c.String(201, "")
 		} else {
 			logrus.Error("Fail to parse json")
 		}
-	default:
-		logrus.Warn("Received UNKNOWN webhook")
 	}
-	// ctx.String(201, "")
-}
-
-type PullRequestWebhook struct {
-	Action      string      `json:"action"`
-	Number      int         `json:"number"`
-	PullRequest PullRequest `json:"pull_request"`
-	Repository  Repository  `json:"repository"`
-	Sender      User        `json:"sender"`
-}
-
-type PullRequest struct {
-	Id     int    `json:"id"`
-	Url    string `json:"url"`
-	Number uint64 `json:"number"`
-	User   User   `json:"user"`
-}
-
-type User struct {
-	Id       int    `json:"id"`
-	Login    string `json:"login"`
-	Username string `json:"username"`
-}
-
-type Repository struct {
-	Id       int    `json:"id"`
-	Owner    User   `json:"owner"`
-	Name     string `json:"name"`
-	FullName string `json:"full_name"`
 }

src/backend/routes/webhook.go

@@ -6,6 +6,6 @@ import (
 )
 
 func LoadWebhook(g *gin.RouterGroup) {
-	controller := new(controllers.WebhookController)
+	controller := controllers.WebhookController{WebhookSecret: "test", RenovateUsername: "renovate-bot"}
 	g.POST("gitea", controller.HandleGiteaWebhook)
 }

src/backend/services/hmac/hmac.go

@@ -4,6 +4,8 @@ import (
 	"crypto/hmac"
 	"crypto/sha256"
 	"encoding/hex"
+
+	"github.com/sirupsen/logrus"
 )
 
 func CalculateHMAC(secret string, message []byte) string {
@@ -12,3 +14,13 @@ func CalculateHMAC(secret string, message []byte) string {
 	h.Write(message)
 	return hex.EncodeToString(h.Sum(nil))
 }
+
+func CompareSignature(body []byte, signature string, secret string) bool {
+	expectedSignature := CalculateHMAC(secret, body)
+
+	if signature == "" || !hmac.Equal([]byte(signature), []byte(expectedSignature)) {
+		logrus.Error("Signature missmatch, Abort !")
+		return false
+	}
+	return true
+}

src/backend/services/webhook/gitea/gitea.go

@@ -0,0 +1,82 @@
+package gitea
+
+import (
+	"strings"
+
+	"github.com/sirupsen/logrus"
+)
+
+func HandleGiteaPullRequest(data PullRequestWebhook, renovateUsername string) {
+	if !isFromRenovate(data.Sender, renovateUsername) {
+		if isEditOnRenovatePR(data, renovateUsername) {
+			logrus.Info("Edit on renovate PR, launch renovate")
+			logrus.Info("Repo: ", data.Repository.FullName, " PR: ", data.Number)
+		}
+	}
+}
+
+func HandleGiteaIssueComment(data IssueComentWebhook, renovateUsername string) {
+	if !isFromRenovate(data.Sender, renovateUsername) {
+		if strings.Contains(data.Comment.Body, "@"+renovateUsername) {
+			logrus.Info("Mention in comment, launch renovate")
+			logrus.Info("Repo: ", data.Repository.FullName)
+		}
+	}
+}
+
+func isFromRenovate(sender User, renovateUsername string) bool {
+	return sender.Username == renovateUsername
+}
+
+func isRenovatePR(data PullRequest, renovateUsername string) bool {
+	return data.User.Username == renovateUsername
+}
+
+func isEditOnRenovatePR(data PullRequestWebhook, renovateUsername string) bool {
+	if data.Action == "edited" {
+		return isRenovatePR(data.PullRequest, renovateUsername)
+	}
+	return false
+}
+
+type PullRequestWebhook struct {
+	Action      string      `json:"action"`
+	Number      int         `json:"number"`
+	PullRequest PullRequest `json:"pull_request"`
+	Repository  Repository  `json:"repository"`
+	Sender      User        `json:"sender"`
+}
+
+type IssueComentWebhook struct {
+	Action     string     `json:"action"`
+	Comment    Comment    `json:"comment"`
+	Repository Repository `json:"repository"`
+	Sender     User       `json:"sender"`
+	IsPull     bool       `json:"is_pull"`
+}
+
+type PullRequest struct {
+	Id     int    `json:"id"`
+	Url    string `json:"url"`
+	Number uint64 `json:"number"`
+	User   User   `json:"user"`
+}
+
+type Comment struct {
+	Id   int    `json:"id"`
+	User User   `json:"user"`
+	Body string `json:"body"`
+}
+
+type User struct {
+	Id       int    `json:"id"`
+	Login    string `json:"login"`
+	Username string `json:"username"`
+}
+
+type Repository struct {
+	Id       int    `json:"id"`
+	Owner    User   `json:"owner"`
+	Name     string `json:"name"`
+	FullName string `json:"full_name"`
+}