Add option to create pull request form branches panel.

pkg/commands/pull_request.go

@@ -0,0 +1,101 @@
+package commands
+
+import (
+	"errors"
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+// Service is a service that repository is on (Github, Bitbucket, ...)
+type Service struct {
+	Name           string
+	PullRequestURL string
+}
+
+// PullRequest opens a link in browser to create new pull request
+// with selected branch
+type PullRequest struct {
+	GitServices []*Service
+	GitCommand  *GitCommand
+}
+
+// RepoInformation holds some basic information about the repo
+type RepoInformation struct {
+	Owner      string
+	Repository string
+}
+
+func getServices() []*Service {
+	return []*Service{
+		{
+			Name:           "github.com",
+			PullRequestURL: "https://github.com/%s/%s/compare/%s?expand=1",
+		},
+		{
+			Name:           "bitbucket.org",
+			PullRequestURL: "https://bitbucket.org/%s/%s/pull-requests/new?t=%s",
+		},
+		{
+			Name:           "gitlab.com",
+			PullRequestURL: "https://gitlab.com/%s/%s/merge_requests/new?merge_request[source_branch]=%s",
+		},
+	}
+}
+
+// NewPullRequest creates new instance of PullRequest
+func NewPullRequest(gitCommand *GitCommand) (*PullRequest, error) {
+	return &PullRequest{
+		GitServices: getServices(),
+		GitCommand:  gitCommand,
+	}, nil
+}
+
+// Create opens link to new pull request in browser
+func (pr *PullRequest) Create(branch *Branch) error {
+	repoURL := pr.GitCommand.GetRemoteURL()
+	var gitService *Service
+
+	for _, service := range pr.GitServices {
+		if strings.Contains(repoURL, service.Name) {
+			gitService = service
+			break
+		}
+	}
+
+	if gitService == nil {
+		return errors.New(pr.GitCommand.Tr.SLocalize("UnsupportedGitService"))
+	}
+
+	repoInfo := getRepoInfoFromURL(repoURL)
+
+	return pr.GitCommand.OSCommand.OpenFile(fmt.Sprintf(
+		gitService.PullRequestURL, repoInfo.Owner, repoInfo.Repository, branch.Name,
+	))
+}
+
+func getRepoInfoFromURL(url string) *RepoInformation {
+	isHTTP := strings.HasPrefix(url, "http")
+	removeGitExtension := regexp.MustCompile(`\.git$`)
+
+	if isHTTP {
+		splits := strings.Split(url, "/")
+		owner := splits[len(splits)-2]
+		repo := removeGitExtension.ReplaceAllString(splits[len(splits)-1], "")
+
+		return &RepoInformation{
+			Owner:      owner,
+			Repository: repo,
+		}
+	}
+
+	tmpSplit := strings.Split(url, ":")
+	splits := strings.Split(tmpSplit[1], "/")
+	owner := splits[0]
+	repo := removeGitExtension.ReplaceAllString(splits[1], "")
+
+	return &RepoInformation{
+		Owner:      owner,
+		Repository: repo,
+	}
+}