// Copyright 2019 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT

package webhook

import (
	"context"

	issues_model "code.gitea.io/gitea/models/issues"
	packages_model "code.gitea.io/gitea/models/packages"
	"code.gitea.io/gitea/models/perm"
	access_model "code.gitea.io/gitea/models/perm/access"
	repo_model "code.gitea.io/gitea/models/repo"
	user_model "code.gitea.io/gitea/models/user"
	"code.gitea.io/gitea/modules/git"
	"code.gitea.io/gitea/modules/log"
	"code.gitea.io/gitea/modules/repository"
	"code.gitea.io/gitea/modules/setting"
	api "code.gitea.io/gitea/modules/structs"
	webhook_module "code.gitea.io/gitea/modules/webhook"
	"code.gitea.io/gitea/services/convert"
	notify_service "code.gitea.io/gitea/services/notify"
)

func init() {
	notify_service.RegisterNotifier(&webhookNotifier{})
}

type webhookNotifier struct {
	notify_service.NullNotifier
}

var _ notify_service.Notifier = &webhookNotifier{}

// NewNotifier create a new webhookNotifier notifier
func NewNotifier() notify_service.Notifier {
	return &webhookNotifier{}
}

func (m *webhookNotifier) IssueClearLabels(ctx context.Context, doer *user_model.User, issue *issues_model.Issue) {
	if err := issue.LoadPoster(ctx); err != nil {
		log.Error("LoadPoster: %v", err)
		return
	}

	if err := issue.LoadRepo(ctx); err != nil {
		log.Error("LoadRepo: %v", err)
		return
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, issue.Poster)
	var err error
	if issue.IsPull {
		if err = issue.LoadPullRequest(ctx); err != nil {
			log.Error("LoadPullRequest: %v", err)
			return
		}

		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequestLabel, &api.PullRequestPayload{
			Action:      api.HookIssueLabelCleared,
			Index:       issue.Index,
			PullRequest: convert.ToAPIPullRequest(ctx, issue.PullRequest, nil),
			Repository:  convert.ToRepo(ctx, issue.Repo, permission),
			Sender:      convert.ToUser(ctx, doer, nil),
		})
	} else {
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventIssueLabel, &api.IssuePayload{
			Action:     api.HookIssueLabelCleared,
			Index:      issue.Index,
			Issue:      convert.ToAPIIssue(ctx, doer, issue),
			Repository: convert.ToRepo(ctx, issue.Repo, permission),
			Sender:     convert.ToUser(ctx, doer, nil),
		})
	}
	if err != nil {
		log.Error("PrepareWebhooks [is_pull: %v]: %v", issue.IsPull, err)
	}
}

func (m *webhookNotifier) ForkRepository(ctx context.Context, doer *user_model.User, oldRepo, repo *repo_model.Repository) {
	oldPermission, _ := access_model.GetUserRepoPermission(ctx, oldRepo, doer)
	permission, _ := access_model.GetUserRepoPermission(ctx, repo, doer)

	// forked webhook
	if err := PrepareWebhooks(ctx, EventSource{Repository: oldRepo}, webhook_module.HookEventFork, &api.ForkPayload{
		Forkee: convert.ToRepo(ctx, oldRepo, oldPermission),
		Repo:   convert.ToRepo(ctx, repo, permission),
		Sender: convert.ToUser(ctx, doer, nil),
	}); err != nil {
		log.Error("PrepareWebhooks [repo_id: %d]: %v", oldRepo.ID, err)
	}

	u := repo.MustOwner(ctx)

	// Add to hook queue for created repo after session commit.
	if u.IsOrganization() {
		if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventRepository, &api.RepositoryPayload{
			Action:       api.HookRepoCreated,
			Repository:   convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
			Organization: convert.ToUser(ctx, u, nil),
			Sender:       convert.ToUser(ctx, doer, nil),
		}); err != nil {
			log.Error("PrepareWebhooks [repo_id: %d]: %v", repo.ID, err)
		}
	}
}

func (m *webhookNotifier) CreateRepository(ctx context.Context, doer, u *user_model.User, repo *repo_model.Repository) {
	// Add to hook queue for created repo after session commit.
	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventRepository, &api.RepositoryPayload{
		Action:       api.HookRepoCreated,
		Repository:   convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Organization: convert.ToUser(ctx, u, nil),
		Sender:       convert.ToUser(ctx, doer, nil),
	}); err != nil {
		log.Error("PrepareWebhooks [repo_id: %d]: %v", repo.ID, err)
	}
}

func (m *webhookNotifier) DeleteRepository(ctx context.Context, doer *user_model.User, repo *repo_model.Repository) {
	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventRepository, &api.RepositoryPayload{
		Action:       api.HookRepoDeleted,
		Repository:   convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Organization: convert.ToUser(ctx, repo.MustOwner(ctx), nil),
		Sender:       convert.ToUser(ctx, doer, nil),
	}); err != nil {
		log.Error("PrepareWebhooks [repo_id: %d]: %v", repo.ID, err)
	}
}

func (m *webhookNotifier) MigrateRepository(ctx context.Context, doer, u *user_model.User, repo *repo_model.Repository) {
	// Add to hook queue for created repo after session commit.
	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventRepository, &api.RepositoryPayload{
		Action:       api.HookRepoCreated,
		Repository:   convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Organization: convert.ToUser(ctx, u, nil),
		Sender:       convert.ToUser(ctx, doer, nil),
	}); err != nil {
		log.Error("PrepareWebhooks [repo_id: %d]: %v", repo.ID, err)
	}
}

func (m *webhookNotifier) IssueChangeAssignee(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, assignee *user_model.User, removed bool, comment *issues_model.Comment) {
	if issue.IsPull {
		permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, doer)

		if err := issue.LoadPullRequest(ctx); err != nil {
			log.Error("LoadPullRequest failed: %v", err)
			return
		}
		apiPullRequest := &api.PullRequestPayload{
			Index:       issue.Index,
			PullRequest: convert.ToAPIPullRequest(ctx, issue.PullRequest, nil),
			Repository:  convert.ToRepo(ctx, issue.Repo, permission),
			Sender:      convert.ToUser(ctx, doer, nil),
		}
		if removed {
			apiPullRequest.Action = api.HookIssueUnassigned
		} else {
			apiPullRequest.Action = api.HookIssueAssigned
		}
		// Assignee comment triggers a webhook
		if err := PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequestAssign, apiPullRequest); err != nil {
			log.Error("PrepareWebhooks [is_pull: %v, remove_assignee: %v]: %v", issue.IsPull, removed, err)
			return
		}
	} else {
		permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, doer)
		apiIssue := &api.IssuePayload{
			Index:      issue.Index,
			Issue:      convert.ToAPIIssue(ctx, doer, issue),
			Repository: convert.ToRepo(ctx, issue.Repo, permission),
			Sender:     convert.ToUser(ctx, doer, nil),
		}
		if removed {
			apiIssue.Action = api.HookIssueUnassigned
		} else {
			apiIssue.Action = api.HookIssueAssigned
		}
		// Assignee comment triggers a webhook
		if err := PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventIssueAssign, apiIssue); err != nil {
			log.Error("PrepareWebhooks [is_pull: %v, remove_assignee: %v]: %v", issue.IsPull, removed, err)
			return
		}
	}
}

func (m *webhookNotifier) IssueChangeTitle(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, oldTitle string) {
	permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, issue.Poster)
	var err error
	if issue.IsPull {
		if err = issue.LoadPullRequest(ctx); err != nil {
			log.Error("LoadPullRequest failed: %v", err)
			return
		}
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequest, &api.PullRequestPayload{
			Action: api.HookIssueEdited,
			Index:  issue.Index,
			Changes: &api.ChangesPayload{
				Title: &api.ChangesFromPayload{
					From: oldTitle,
				},
			},
			PullRequest: convert.ToAPIPullRequest(ctx, issue.PullRequest, nil),
			Repository:  convert.ToRepo(ctx, issue.Repo, permission),
			Sender:      convert.ToUser(ctx, doer, nil),
		})
	} else {
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventIssues, &api.IssuePayload{
			Action: api.HookIssueEdited,
			Index:  issue.Index,
			Changes: &api.ChangesPayload{
				Title: &api.ChangesFromPayload{
					From: oldTitle,
				},
			},
			Issue:      convert.ToAPIIssue(ctx, doer, issue),
			Repository: convert.ToRepo(ctx, issue.Repo, permission),
			Sender:     convert.ToUser(ctx, doer, nil),
		})
	}

	if err != nil {
		log.Error("PrepareWebhooks [is_pull: %v]: %v", issue.IsPull, err)
	}
}

func (m *webhookNotifier) IssueChangeStatus(ctx context.Context, doer *user_model.User, commitID string, issue *issues_model.Issue, actionComment *issues_model.Comment, isClosed bool) {
	permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, issue.Poster)
	var err error
	if issue.IsPull {
		if err = issue.LoadPullRequest(ctx); err != nil {
			log.Error("LoadPullRequest: %v", err)
			return
		}
		// Merge pull request calls issue.changeStatus so we need to handle separately.
		apiPullRequest := &api.PullRequestPayload{
			Index:       issue.Index,
			PullRequest: convert.ToAPIPullRequest(ctx, issue.PullRequest, nil),
			Repository:  convert.ToRepo(ctx, issue.Repo, permission),
			Sender:      convert.ToUser(ctx, doer, nil),
			CommitID:    commitID,
		}
		if isClosed {
			apiPullRequest.Action = api.HookIssueClosed
		} else {
			apiPullRequest.Action = api.HookIssueReOpened
		}
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequest, apiPullRequest)
	} else {
		apiIssue := &api.IssuePayload{
			Index:      issue.Index,
			Issue:      convert.ToAPIIssue(ctx, doer, issue),
			Repository: convert.ToRepo(ctx, issue.Repo, permission),
			Sender:     convert.ToUser(ctx, doer, nil),
			CommitID:   commitID,
		}
		if isClosed {
			apiIssue.Action = api.HookIssueClosed
		} else {
			apiIssue.Action = api.HookIssueReOpened
		}
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventIssues, apiIssue)
	}
	if err != nil {
		log.Error("PrepareWebhooks [is_pull: %v, is_closed: %v]: %v", issue.IsPull, isClosed, err)
	}
}

func (m *webhookNotifier) NewIssue(ctx context.Context, issue *issues_model.Issue, mentions []*user_model.User) {
	if err := issue.LoadRepo(ctx); err != nil {
		log.Error("issue.LoadRepo: %v", err)
		return
	}
	if err := issue.LoadPoster(ctx); err != nil {
		log.Error("issue.LoadPoster: %v", err)
		return
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, issue.Poster)
	if err := PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventIssues, &api.IssuePayload{
		Action:     api.HookIssueOpened,
		Index:      issue.Index,
		Issue:      convert.ToAPIIssue(ctx, issue.Poster, issue),
		Repository: convert.ToRepo(ctx, issue.Repo, permission),
		Sender:     convert.ToUser(ctx, issue.Poster, nil),
	}); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}

func (m *webhookNotifier) NewPullRequest(ctx context.Context, pull *issues_model.PullRequest, mentions []*user_model.User) {
	if err := pull.LoadIssue(ctx); err != nil {
		log.Error("pull.LoadIssue: %v", err)
		return
	}
	if err := pull.Issue.LoadRepo(ctx); err != nil {
		log.Error("pull.Issue.LoadRepo: %v", err)
		return
	}
	if err := pull.Issue.LoadPoster(ctx); err != nil {
		log.Error("pull.Issue.LoadPoster: %v", err)
		return
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, pull.Issue.Repo, pull.Issue.Poster)
	if err := PrepareWebhooks(ctx, EventSource{Repository: pull.Issue.Repo}, webhook_module.HookEventPullRequest, &api.PullRequestPayload{
		Action:      api.HookIssueOpened,
		Index:       pull.Issue.Index,
		PullRequest: convert.ToAPIPullRequest(ctx, pull, nil),
		Repository:  convert.ToRepo(ctx, pull.Issue.Repo, permission),
		Sender:      convert.ToUser(ctx, pull.Issue.Poster, nil),
	}); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}

func (m *webhookNotifier) IssueChangeContent(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, oldContent string) {
	if err := issue.LoadRepo(ctx); err != nil {
		log.Error("LoadRepo: %v", err)
		return
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, issue.Poster)
	var err error
	if issue.IsPull {
		if err := issue.LoadPullRequest(ctx); err != nil {
			log.Error("LoadPullRequest: %v", err)
			return
		}
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequest, &api.PullRequestPayload{
			Action: api.HookIssueEdited,
			Index:  issue.Index,
			Changes: &api.ChangesPayload{
				Body: &api.ChangesFromPayload{
					From: oldContent,
				},
			},
			PullRequest: convert.ToAPIPullRequest(ctx, issue.PullRequest, nil),
			Repository:  convert.ToRepo(ctx, issue.Repo, permission),
			Sender:      convert.ToUser(ctx, doer, nil),
		})
	} else {
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventIssues, &api.IssuePayload{
			Action: api.HookIssueEdited,
			Index:  issue.Index,
			Changes: &api.ChangesPayload{
				Body: &api.ChangesFromPayload{
					From: oldContent,
				},
			},
			Issue:      convert.ToAPIIssue(ctx, doer, issue),
			Repository: convert.ToRepo(ctx, issue.Repo, permission),
			Sender:     convert.ToUser(ctx, doer, nil),
		})
	}
	if err != nil {
		log.Error("PrepareWebhooks [is_pull: %v]: %v", issue.IsPull, err)
	}
}

func (m *webhookNotifier) UpdateComment(ctx context.Context, doer *user_model.User, c *issues_model.Comment, oldContent string) {
	if err := c.LoadPoster(ctx); err != nil {
		log.Error("LoadPoster: %v", err)
		return
	}
	if err := c.LoadIssue(ctx); err != nil {
		log.Error("LoadIssue: %v", err)
		return
	}

	if err := c.Issue.LoadAttributes(ctx); err != nil {
		log.Error("LoadAttributes: %v", err)
		return
	}

	var eventType webhook_module.HookEventType
	if c.Issue.IsPull {
		eventType = webhook_module.HookEventPullRequestComment
	} else {
		eventType = webhook_module.HookEventIssueComment
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, c.Issue.Repo, doer)
	if err := PrepareWebhooks(ctx, EventSource{Repository: c.Issue.Repo}, eventType, &api.IssueCommentPayload{
		Action:  api.HookIssueCommentEdited,
		Issue:   convert.ToAPIIssue(ctx, doer, c.Issue),
		Comment: convert.ToAPIComment(ctx, c.Issue.Repo, c),
		Changes: &api.ChangesPayload{
			Body: &api.ChangesFromPayload{
				From: oldContent,
			},
		},
		Repository: convert.ToRepo(ctx, c.Issue.Repo, permission),
		Sender:     convert.ToUser(ctx, doer, nil),
		IsPull:     c.Issue.IsPull,
	}); err != nil {
		log.Error("PrepareWebhooks [comment_id: %d]: %v", c.ID, err)
	}
}

func (m *webhookNotifier) CreateIssueComment(ctx context.Context, doer *user_model.User, repo *repo_model.Repository,
	issue *issues_model.Issue, comment *issues_model.Comment, mentions []*user_model.User,
) {
	var eventType webhook_module.HookEventType
	if issue.IsPull {
		eventType = webhook_module.HookEventPullRequestComment
	} else {
		eventType = webhook_module.HookEventIssueComment
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, repo, doer)
	if err := PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, eventType, &api.IssueCommentPayload{
		Action:     api.HookIssueCommentCreated,
		Issue:      convert.ToAPIIssue(ctx, doer, issue),
		Comment:    convert.ToAPIComment(ctx, repo, comment),
		Repository: convert.ToRepo(ctx, repo, permission),
		Sender:     convert.ToUser(ctx, doer, nil),
		IsPull:     issue.IsPull,
	}); err != nil {
		log.Error("PrepareWebhooks [comment_id: %d]: %v", comment.ID, err)
	}
}

func (m *webhookNotifier) DeleteComment(ctx context.Context, doer *user_model.User, comment *issues_model.Comment) {
	var err error

	if err = comment.LoadPoster(ctx); err != nil {
		log.Error("LoadPoster: %v", err)
		return
	}
	if err = comment.LoadIssue(ctx); err != nil {
		log.Error("LoadIssue: %v", err)
		return
	}

	if err = comment.Issue.LoadAttributes(ctx); err != nil {
		log.Error("LoadAttributes: %v", err)
		return
	}

	var eventType webhook_module.HookEventType
	if comment.Issue.IsPull {
		eventType = webhook_module.HookEventPullRequestComment
	} else {
		eventType = webhook_module.HookEventIssueComment
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, comment.Issue.Repo, doer)
	if err := PrepareWebhooks(ctx, EventSource{Repository: comment.Issue.Repo}, eventType, &api.IssueCommentPayload{
		Action:     api.HookIssueCommentDeleted,
		Issue:      convert.ToAPIIssue(ctx, doer, comment.Issue),
		Comment:    convert.ToAPIComment(ctx, comment.Issue.Repo, comment),
		Repository: convert.ToRepo(ctx, comment.Issue.Repo, permission),
		Sender:     convert.ToUser(ctx, doer, nil),
		IsPull:     comment.Issue.IsPull,
	}); err != nil {
		log.Error("PrepareWebhooks [comment_id: %d]: %v", comment.ID, err)
	}
}

func (m *webhookNotifier) NewWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, page, comment string) {
	// Add to hook queue for created wiki page.
	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventWiki, &api.WikiPayload{
		Action:     api.HookWikiCreated,
		Repository: convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Sender:     convert.ToUser(ctx, doer, nil),
		Page:       page,
		Comment:    comment,
	}); err != nil {
		log.Error("PrepareWebhooks [repo_id: %d]: %v", repo.ID, err)
	}
}

func (m *webhookNotifier) EditWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, page, comment string) {
	// Add to hook queue for edit wiki page.
	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventWiki, &api.WikiPayload{
		Action:     api.HookWikiEdited,
		Repository: convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Sender:     convert.ToUser(ctx, doer, nil),
		Page:       page,
		Comment:    comment,
	}); err != nil {
		log.Error("PrepareWebhooks [repo_id: %d]: %v", repo.ID, err)
	}
}

func (m *webhookNotifier) DeleteWikiPage(ctx context.Context, doer *user_model.User, repo *repo_model.Repository, page string) {
	// Add to hook queue for edit wiki page.
	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventWiki, &api.WikiPayload{
		Action:     api.HookWikiDeleted,
		Repository: convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Sender:     convert.ToUser(ctx, doer, nil),
		Page:       page,
	}); err != nil {
		log.Error("PrepareWebhooks [repo_id: %d]: %v", repo.ID, err)
	}
}

func (m *webhookNotifier) IssueChangeLabels(ctx context.Context, doer *user_model.User, issue *issues_model.Issue,
	addedLabels, removedLabels []*issues_model.Label,
) {
	var err error

	if err = issue.LoadRepo(ctx); err != nil {
		log.Error("LoadRepo: %v", err)
		return
	}

	if err = issue.LoadPoster(ctx); err != nil {
		log.Error("LoadPoster: %v", err)
		return
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, issue.Poster)
	if issue.IsPull {
		if err = issue.LoadPullRequest(ctx); err != nil {
			log.Error("loadPullRequest: %v", err)
			return
		}
		if err = issue.PullRequest.LoadIssue(ctx); err != nil {
			log.Error("LoadIssue: %v", err)
			return
		}
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequestLabel, &api.PullRequestPayload{
			Action:      api.HookIssueLabelUpdated,
			Index:       issue.Index,
			PullRequest: convert.ToAPIPullRequest(ctx, issue.PullRequest, nil),
			Repository:  convert.ToRepo(ctx, issue.Repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
			Sender:      convert.ToUser(ctx, doer, nil),
		})
	} else {
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventIssueLabel, &api.IssuePayload{
			Action:     api.HookIssueLabelUpdated,
			Index:      issue.Index,
			Issue:      convert.ToAPIIssue(ctx, doer, issue),
			Repository: convert.ToRepo(ctx, issue.Repo, permission),
			Sender:     convert.ToUser(ctx, doer, nil),
		})
	}
	if err != nil {
		log.Error("PrepareWebhooks [is_pull: %v]: %v", issue.IsPull, err)
	}
}

func (m *webhookNotifier) IssueChangeMilestone(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, oldMilestoneID int64) {
	var hookAction api.HookIssueAction
	var err error
	if issue.MilestoneID > 0 {
		hookAction = api.HookIssueMilestoned
	} else {
		hookAction = api.HookIssueDemilestoned
	}

	if err = issue.LoadAttributes(ctx); err != nil {
		log.Error("issue.LoadAttributes failed: %v", err)
		return
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, doer)
	if issue.IsPull {
		err = issue.PullRequest.LoadIssue(ctx)
		if err != nil {
			log.Error("LoadIssue: %v", err)
			return
		}
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequestMilestone, &api.PullRequestPayload{
			Action:      hookAction,
			Index:       issue.Index,
			PullRequest: convert.ToAPIPullRequest(ctx, issue.PullRequest, nil),
			Repository:  convert.ToRepo(ctx, issue.Repo, permission),
			Sender:      convert.ToUser(ctx, doer, nil),
		})
	} else {
		err = PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventIssueMilestone, &api.IssuePayload{
			Action:     hookAction,
			Index:      issue.Index,
			Issue:      convert.ToAPIIssue(ctx, doer, issue),
			Repository: convert.ToRepo(ctx, issue.Repo, permission),
			Sender:     convert.ToUser(ctx, doer, nil),
		})
	}
	if err != nil {
		log.Error("PrepareWebhooks [is_pull: %v]: %v", issue.IsPull, err)
	}
}

func (m *webhookNotifier) PushCommits(ctx context.Context, pusher *user_model.User, repo *repo_model.Repository, opts *repository.PushUpdateOptions, commits *repository.PushCommits) {
	apiPusher := convert.ToUser(ctx, pusher, nil)
	apiCommits, apiHeadCommit, err := commits.ToAPIPayloadCommits(ctx, repo.RepoPath(), repo.HTMLURL())
	if err != nil {
		log.Error("commits.ToAPIPayloadCommits failed: %v", err)
		return
	}

	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventPush, &api.PushPayload{
		Ref:          opts.RefFullName.String(),
		Before:       opts.OldCommitID,
		After:        opts.NewCommitID,
		CompareURL:   setting.AppURL + commits.CompareURL,
		Commits:      apiCommits,
		TotalCommits: commits.Len,
		HeadCommit:   apiHeadCommit,
		Repo:         convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Pusher:       apiPusher,
		Sender:       apiPusher,
	}); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}

func (m *webhookNotifier) AutoMergePullRequest(ctx context.Context, doer *user_model.User, pr *issues_model.PullRequest) {
	// just redirect to the MergePullRequest
	m.MergePullRequest(ctx, doer, pr)
}

func (*webhookNotifier) MergePullRequest(ctx context.Context, doer *user_model.User, pr *issues_model.PullRequest) {
	// Reload pull request information.
	if err := pr.LoadAttributes(ctx); err != nil {
		log.Error("LoadAttributes: %v", err)
		return
	}

	if err := pr.LoadIssue(ctx); err != nil {
		log.Error("LoadIssue: %v", err)
		return
	}

	if err := pr.Issue.LoadRepo(ctx); err != nil {
		log.Error("pr.Issue.LoadRepo: %v", err)
		return
	}

	permission, err := access_model.GetUserRepoPermission(ctx, pr.Issue.Repo, doer)
	if err != nil {
		log.Error("models.GetUserRepoPermission: %v", err)
		return
	}

	// Merge pull request calls issue.changeStatus so we need to handle separately.
	apiPullRequest := &api.PullRequestPayload{
		Index:       pr.Issue.Index,
		PullRequest: convert.ToAPIPullRequest(ctx, pr, nil),
		Repository:  convert.ToRepo(ctx, pr.Issue.Repo, permission),
		Sender:      convert.ToUser(ctx, doer, nil),
		Action:      api.HookIssueClosed,
	}

	if err := PrepareWebhooks(ctx, EventSource{Repository: pr.Issue.Repo}, webhook_module.HookEventPullRequest, apiPullRequest); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}

func (m *webhookNotifier) PullRequestChangeTargetBranch(ctx context.Context, doer *user_model.User, pr *issues_model.PullRequest, oldBranch string) {
	if err := pr.LoadIssue(ctx); err != nil {
		log.Error("LoadIssue: %v", err)
		return
	}

	issue := pr.Issue

	mode, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, issue.Poster)
	if err := PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequest, &api.PullRequestPayload{
		Action: api.HookIssueEdited,
		Index:  issue.Index,
		Changes: &api.ChangesPayload{
			Ref: &api.ChangesFromPayload{
				From: oldBranch,
			},
		},
		PullRequest: convert.ToAPIPullRequest(ctx, pr, nil),
		Repository:  convert.ToRepo(ctx, issue.Repo, mode),
		Sender:      convert.ToUser(ctx, doer, nil),
	}); err != nil {
		log.Error("PrepareWebhooks [pr: %d]: %v", pr.ID, err)
	}
}

func (m *webhookNotifier) PullRequestReview(ctx context.Context, pr *issues_model.PullRequest, review *issues_model.Review, comment *issues_model.Comment, mentions []*user_model.User) {
	var reviewHookType webhook_module.HookEventType

	switch review.Type {
	case issues_model.ReviewTypeApprove:
		reviewHookType = webhook_module.HookEventPullRequestReviewApproved
	case issues_model.ReviewTypeComment:
		reviewHookType = webhook_module.HookEventPullRequestReviewComment
	case issues_model.ReviewTypeReject:
		reviewHookType = webhook_module.HookEventPullRequestReviewRejected
	default:
		// unsupported review webhook type here
		log.Error("Unsupported review webhook type")
		return
	}

	if err := pr.LoadIssue(ctx); err != nil {
		log.Error("LoadIssue: %v", err)
		return
	}

	permission, err := access_model.GetUserRepoPermission(ctx, review.Issue.Repo, review.Issue.Poster)
	if err != nil {
		log.Error("models.GetUserRepoPermission: %v", err)
		return
	}
	if err := PrepareWebhooks(ctx, EventSource{Repository: review.Issue.Repo}, reviewHookType, &api.PullRequestPayload{
		Action:      api.HookIssueReviewed,
		Index:       review.Issue.Index,
		PullRequest: convert.ToAPIPullRequest(ctx, pr, nil),
		Repository:  convert.ToRepo(ctx, review.Issue.Repo, permission),
		Sender:      convert.ToUser(ctx, review.Reviewer, nil),
		Review: &api.ReviewPayload{
			Type:    string(reviewHookType),
			Content: review.Content,
		},
	}); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}

func (m *webhookNotifier) PullRequestReviewRequest(ctx context.Context, doer *user_model.User, issue *issues_model.Issue, reviewer *user_model.User, isRequest bool, comment *issues_model.Comment) {
	if !issue.IsPull {
		log.Warn("PullRequestReviewRequest: issue is not a pull request: %v", issue.ID)
		return
	}
	permission, _ := access_model.GetUserRepoPermission(ctx, issue.Repo, doer)
	if err := issue.LoadPullRequest(ctx); err != nil {
		log.Error("LoadPullRequest failed: %v", err)
		return
	}
	apiPullRequest := &api.PullRequestPayload{
		Index:             issue.Index,
		PullRequest:       convert.ToAPIPullRequest(ctx, issue.PullRequest, nil),
		RequestedReviewer: convert.ToUser(ctx, reviewer, nil),
		Repository:        convert.ToRepo(ctx, issue.Repo, permission),
		Sender:            convert.ToUser(ctx, doer, nil),
	}
	if isRequest {
		apiPullRequest.Action = api.HookIssueReviewRequested
	} else {
		apiPullRequest.Action = api.HookIssueReviewRequestRemoved
	}
	if err := PrepareWebhooks(ctx, EventSource{Repository: issue.Repo}, webhook_module.HookEventPullRequestReviewRequest, apiPullRequest); err != nil {
		log.Error("PrepareWebhooks [review_requested: %v]: %v", isRequest, err)
		return
	}
}

func (m *webhookNotifier) CreateRef(ctx context.Context, pusher *user_model.User, repo *repo_model.Repository, refFullName git.RefName, refID string) {
	apiPusher := convert.ToUser(ctx, pusher, nil)
	apiRepo := convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeNone})

	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventCreate, &api.CreatePayload{
		Ref:     refFullName.String(),
		Sha:     refID,
		RefType: refFullName.RefType(),
		Repo:    apiRepo,
		Sender:  apiPusher,
	}); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}

func (m *webhookNotifier) PullRequestSynchronized(ctx context.Context, doer *user_model.User, pr *issues_model.PullRequest) {
	if err := pr.LoadIssue(ctx); err != nil {
		log.Error("LoadIssue: %v", err)
		return
	}
	if err := pr.Issue.LoadAttributes(ctx); err != nil {
		log.Error("LoadAttributes: %v", err)
		return
	}

	if err := PrepareWebhooks(ctx, EventSource{Repository: pr.Issue.Repo}, webhook_module.HookEventPullRequestSync, &api.PullRequestPayload{
		Action:      api.HookIssueSynchronized,
		Index:       pr.Issue.Index,
		PullRequest: convert.ToAPIPullRequest(ctx, pr, nil),
		Repository:  convert.ToRepo(ctx, pr.Issue.Repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Sender:      convert.ToUser(ctx, doer, nil),
	}); err != nil {
		log.Error("PrepareWebhooks [pull_id: %v]: %v", pr.ID, err)
	}
}

func (m *webhookNotifier) DeleteRef(ctx context.Context, pusher *user_model.User, repo *repo_model.Repository, refFullName git.RefName) {
	apiPusher := convert.ToUser(ctx, pusher, nil)
	apiRepo := convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner})

	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventDelete, &api.DeletePayload{
		Ref:        refFullName.String(),
		RefType:    refFullName.RefType(),
		PusherType: api.PusherTypeUser,
		Repo:       apiRepo,
		Sender:     apiPusher,
	}); err != nil {
		log.Error("PrepareWebhooks.(delete %s): %v", refFullName.RefType(), err)
	}
}

func sendReleaseHook(ctx context.Context, doer *user_model.User, rel *repo_model.Release, action api.HookReleaseAction) {
	if err := rel.LoadAttributes(ctx); err != nil {
		log.Error("LoadAttributes: %v", err)
		return
	}

	permission, _ := access_model.GetUserRepoPermission(ctx, rel.Repo, doer)
	if err := PrepareWebhooks(ctx, EventSource{Repository: rel.Repo}, webhook_module.HookEventRelease, &api.ReleasePayload{
		Action:     action,
		Release:    convert.ToAPIRelease(ctx, rel.Repo, rel),
		Repository: convert.ToRepo(ctx, rel.Repo, permission),
		Sender:     convert.ToUser(ctx, doer, nil),
	}); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}

func (m *webhookNotifier) NewRelease(ctx context.Context, rel *repo_model.Release) {
	sendReleaseHook(ctx, rel.Publisher, rel, api.HookReleasePublished)
}

func (m *webhookNotifier) UpdateRelease(ctx context.Context, doer *user_model.User, rel *repo_model.Release) {
	sendReleaseHook(ctx, doer, rel, api.HookReleaseUpdated)
}

func (m *webhookNotifier) DeleteRelease(ctx context.Context, doer *user_model.User, rel *repo_model.Release) {
	sendReleaseHook(ctx, doer, rel, api.HookReleaseDeleted)
}

func (m *webhookNotifier) SyncPushCommits(ctx context.Context, pusher *user_model.User, repo *repo_model.Repository, opts *repository.PushUpdateOptions, commits *repository.PushCommits) {
	apiPusher := convert.ToUser(ctx, pusher, nil)
	apiCommits, apiHeadCommit, err := commits.ToAPIPayloadCommits(ctx, repo.RepoPath(), repo.HTMLURL())
	if err != nil {
		log.Error("commits.ToAPIPayloadCommits failed: %v", err)
		return
	}

	if err := PrepareWebhooks(ctx, EventSource{Repository: repo}, webhook_module.HookEventPush, &api.PushPayload{
		Ref:          opts.RefFullName.String(),
		Before:       opts.OldCommitID,
		After:        opts.NewCommitID,
		CompareURL:   setting.AppURL + commits.CompareURL,
		Commits:      apiCommits,
		TotalCommits: commits.Len,
		HeadCommit:   apiHeadCommit,
		Repo:         convert.ToRepo(ctx, repo, access_model.Permission{AccessMode: perm.AccessModeOwner}),
		Pusher:       apiPusher,
		Sender:       apiPusher,
	}); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}

func (m *webhookNotifier) SyncCreateRef(ctx context.Context, pusher *user_model.User, repo *repo_model.Repository, refFullName git.RefName, refID string) {
	m.CreateRef(ctx, pusher, repo, refFullName, refID)
}

func (m *webhookNotifier) SyncDeleteRef(ctx context.Context, pusher *user_model.User, repo *repo_model.Repository, refFullName git.RefName) {
	m.DeleteRef(ctx, pusher, repo, refFullName)
}

func (m *webhookNotifier) PackageCreate(ctx context.Context, doer *user_model.User, pd *packages_model.PackageDescriptor) {
	notifyPackage(ctx, doer, pd, api.HookPackageCreated)
}

func (m *webhookNotifier) PackageDelete(ctx context.Context, doer *user_model.User, pd *packages_model.PackageDescriptor) {
	notifyPackage(ctx, doer, pd, api.HookPackageDeleted)
}

func notifyPackage(ctx context.Context, sender *user_model.User, pd *packages_model.PackageDescriptor, action api.HookPackageAction) {
	source := EventSource{
		Repository: pd.Repository,
		Owner:      pd.Owner,
	}

	apiPackage, err := convert.ToPackage(ctx, pd, sender)
	if err != nil {
		log.Error("Error converting package: %v", err)
		return
	}

	if err := PrepareWebhooks(ctx, source, webhook_module.HookEventPackage, &api.PackagePayload{
		Action:  action,
		Package: apiPackage,
		Sender:  convert.ToUser(ctx, sender, nil),
	}); err != nil {
		log.Error("PrepareWebhooks: %v", err)
	}
}
