Move webhook to a standalone package under modules (#8747)

* Move webhook to a standalone package under modules

* fix test

* fix comments

modules/webhook/webhook_test.go

@@ -0,0 +1,67 @@
+// 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 webhook
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models"
+	api "code.gitea.io/gitea/modules/structs"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPrepareWebhooks(t *testing.T) {
+	assert.NoError(t, models.PrepareTestDatabase())
+
+	repo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 1}).(*models.Repository)
+	hookTasks := []*models.HookTask{
+		{RepoID: repo.ID, HookID: 1, EventType: models.HookEventPush},
+	}
+	for _, hookTask := range hookTasks {
+		models.AssertNotExistsBean(t, hookTask)
+	}
+	assert.NoError(t, PrepareWebhooks(repo, models.HookEventPush, &api.PushPayload{}))
+	for _, hookTask := range hookTasks {
+		models.AssertExistsAndLoadBean(t, hookTask)
+	}
+}
+
+func TestPrepareWebhooksBranchFilterMatch(t *testing.T) {
+	assert.NoError(t, models.PrepareTestDatabase())
+
+	repo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 2}).(*models.Repository)
+	hookTasks := []*models.HookTask{
+		{RepoID: repo.ID, HookID: 4, EventType: models.HookEventPush},
+	}
+	for _, hookTask := range hookTasks {
+		models.AssertNotExistsBean(t, hookTask)
+	}
+	// this test also ensures that * doesn't handle / in any special way (like shell would)
+	assert.NoError(t, PrepareWebhooks(repo, models.HookEventPush, &api.PushPayload{Ref: "refs/heads/feature/7791"}))
+	for _, hookTask := range hookTasks {
+		models.AssertExistsAndLoadBean(t, hookTask)
+	}
+}
+
+func TestPrepareWebhooksBranchFilterNoMatch(t *testing.T) {
+	assert.NoError(t, models.PrepareTestDatabase())
+
+	repo := models.AssertExistsAndLoadBean(t, &models.Repository{ID: 2}).(*models.Repository)
+	hookTasks := []*models.HookTask{
+		{RepoID: repo.ID, HookID: 4, EventType: models.HookEventPush},
+	}
+	for _, hookTask := range hookTasks {
+		models.AssertNotExistsBean(t, hookTask)
+	}
+	assert.NoError(t, PrepareWebhooks(repo, models.HookEventPush, &api.PushPayload{Ref: "refs/heads/fix_weird_bug"}))
+
+	for _, hookTask := range hookTasks {
+		models.AssertNotExistsBean(t, hookTask)
+	}
+}
+
+// TODO TestHookTask_deliver
+
+// TODO TestDeliverHooks