Move push commits from models to modules/repository (#9370)

* Move push commits from models to modules/repository

* fix test

* fix test

* fix test

* fix test

* fix test

Co-authored-by: zeripath <art27@cantab.net>

modules/repository/commits.go

@@ -0,0 +1,168 @@
+// 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 repository
+
+import (
+	"container/list"
+	"fmt"
+	"time"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/base"
+	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/log"
+	api "code.gitea.io/gitea/modules/structs"
+)
+
+// PushCommit represents a commit in a push operation.
+type PushCommit struct {
+	Sha1           string
+	Message        string
+	AuthorEmail    string
+	AuthorName     string
+	CommitterEmail string
+	CommitterName  string
+	Timestamp      time.Time
+}
+
+// PushCommits represents list of commits in a push operation.
+type PushCommits struct {
+	Len        int
+	Commits    []*PushCommit
+	CompareURL string
+
+	avatars    map[string]string
+	emailUsers map[string]*models.User
+}
+
+// NewPushCommits creates a new PushCommits object.
+func NewPushCommits() *PushCommits {
+	return &PushCommits{
+		avatars:    make(map[string]string),
+		emailUsers: make(map[string]*models.User),
+	}
+}
+
+// ToAPIPayloadCommits converts a PushCommits object to
+// api.PayloadCommit format.
+func (pc *PushCommits) ToAPIPayloadCommits(repoPath, repoLink string) ([]*api.PayloadCommit, error) {
+	commits := make([]*api.PayloadCommit, len(pc.Commits))
+
+	if pc.emailUsers == nil {
+		pc.emailUsers = make(map[string]*models.User)
+	}
+	var err error
+	for i, commit := range pc.Commits {
+		authorUsername := ""
+		author, ok := pc.emailUsers[commit.AuthorEmail]
+		if !ok {
+			author, err = models.GetUserByEmail(commit.AuthorEmail)
+			if err == nil {
+				authorUsername = author.Name
+				pc.emailUsers[commit.AuthorEmail] = author
+			}
+		} else {
+			authorUsername = author.Name
+		}
+
+		committerUsername := ""
+		committer, ok := pc.emailUsers[commit.CommitterEmail]
+		if !ok {
+			committer, err = models.GetUserByEmail(commit.CommitterEmail)
+			if err == nil {
+				// TODO: check errors other than email not found.
+				committerUsername = committer.Name
+				pc.emailUsers[commit.CommitterEmail] = committer
+			}
+		} else {
+			committerUsername = committer.Name
+		}
+
+		fileStatus, err := git.GetCommitFileStatus(repoPath, commit.Sha1)
+		if err != nil {
+			return nil, fmt.Errorf("FileStatus [commit_sha1: %s]: %v", commit.Sha1, err)
+		}
+
+		commits[i] = &api.PayloadCommit{
+			ID:      commit.Sha1,
+			Message: commit.Message,
+			URL:     fmt.Sprintf("%s/commit/%s", repoLink, commit.Sha1),
+			Author: &api.PayloadUser{
+				Name:     commit.AuthorName,
+				Email:    commit.AuthorEmail,
+				UserName: authorUsername,
+			},
+			Committer: &api.PayloadUser{
+				Name:     commit.CommitterName,
+				Email:    commit.CommitterEmail,
+				UserName: committerUsername,
+			},
+			Added:     fileStatus.Added,
+			Removed:   fileStatus.Removed,
+			Modified:  fileStatus.Modified,
+			Timestamp: commit.Timestamp,
+		}
+	}
+	return commits, nil
+}
+
+// AvatarLink tries to match user in database with e-mail
+// in order to show custom avatar, and falls back to general avatar link.
+func (pc *PushCommits) AvatarLink(email string) string {
+	if pc.avatars == nil {
+		pc.avatars = make(map[string]string)
+	}
+	avatar, ok := pc.avatars[email]
+	if ok {
+		return avatar
+	}
+
+	u, ok := pc.emailUsers[email]
+	if !ok {
+		var err error
+		u, err = models.GetUserByEmail(email)
+		if err != nil {
+			pc.avatars[email] = base.AvatarLink(email)
+			if !models.IsErrUserNotExist(err) {
+				log.Error("GetUserByEmail: %v", err)
+				return ""
+			}
+		} else {
+			pc.emailUsers[email] = u
+		}
+	}
+	if u != nil {
+		pc.avatars[email] = u.RelAvatarLink()
+	}
+
+	return pc.avatars[email]
+}
+
+// CommitToPushCommit transforms a git.Commit to PushCommit type.
+func CommitToPushCommit(commit *git.Commit) *PushCommit {
+	return &PushCommit{
+		Sha1:           commit.ID.String(),
+		Message:        commit.Message(),
+		AuthorEmail:    commit.Author.Email,
+		AuthorName:     commit.Author.Name,
+		CommitterEmail: commit.Committer.Email,
+		CommitterName:  commit.Committer.Name,
+		Timestamp:      commit.Author.When,
+	}
+}
+
+// ListToPushCommits transforms a list.List to PushCommits type.
+func ListToPushCommits(l *list.List) *PushCommits {
+	var commits []*PushCommit
+	var actEmail string
+	for e := l.Front(); e != nil; e = e.Next() {
+		commit := e.Value.(*git.Commit)
+		if actEmail == "" {
+			actEmail = commit.Committer.Email
+		}
+		commits = append(commits, CommitToPushCommit(commit))
+	}
+	return &PushCommits{l.Len(), commits, "", make(map[string]string), make(map[string]*models.User)}
+}