1package launchpad
  2
  3import (
  4	"bufio"
  5	"errors"
  6	"fmt"
  7	"net/http"
  8	"os"
  9	"regexp"
 10	"strings"
 11	"time"
 12
 13	"github.com/MichaelMure/git-bug/bridge/core"
 14	"github.com/MichaelMure/git-bug/repository"
 15)
 16
 17var ErrBadProjectURL = errors.New("bad Launchpad project URL")
 18
 19const (
 20	target         = "launchpad-preview"
 21	keyProject     = "project"
 22	defaultTimeout = 60 * time.Second
 23)
 24
 25func (l *Launchpad) Configure(repo repository.RepoCommon, params core.BridgeParams) (core.Configuration, error) {
 26	if params.Token != "" {
 27		fmt.Println("warning: --token is ineffective for a Launchpad bridge")
 28	}
 29	if params.Owner != "" {
 30		fmt.Println("warning: --owner is ineffective for a Launchpad bridge")
 31	}
 32
 33	conf := make(core.Configuration)
 34	var err error
 35	var project string
 36
 37	if params.Project != "" {
 38		project = params.Project
 39
 40	} else if params.URL != "" {
 41		// get project name from url
 42		project, err = splitURL(params.URL)
 43		if err != nil {
 44			return nil, err
 45		}
 46
 47	} else {
 48		// get project name from terminal prompt
 49		project, err = promptProjectName()
 50		if err != nil {
 51			return nil, err
 52		}
 53	}
 54
 55	// verify project
 56	ok, err := validateProject(project)
 57	if err != nil {
 58		return nil, err
 59	}
 60	if !ok {
 61		return nil, fmt.Errorf("project doesn't exist")
 62	}
 63
 64	conf[keyProject] = project
 65	conf[core.KeyTarget] = target
 66
 67	err = l.ValidateConfig(conf)
 68	if err != nil {
 69		return nil, err
 70	}
 71
 72	return conf, nil
 73}
 74
 75func (*Launchpad) ValidateConfig(conf core.Configuration) error {
 76	if _, ok := conf[keyProject]; !ok {
 77		return fmt.Errorf("missing %s key", keyProject)
 78	}
 79
 80	if _, ok := conf[core.KeyTarget]; !ok {
 81		return fmt.Errorf("missing %s key", core.KeyTarget)
 82	}
 83
 84	return nil
 85}
 86
 87func promptProjectName() (string, error) {
 88	for {
 89		fmt.Print("Launchpad project name: ")
 90
 91		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
 92		if err != nil {
 93			return "", err
 94		}
 95
 96		line = strings.TrimRight(line, "\n")
 97
 98		if line == "" {
 99			fmt.Println("Project name is empty")
100			continue
101		}
102
103		return line, nil
104	}
105}
106
107func validateProject(project string) (bool, error) {
108	url := fmt.Sprintf("%s/%s", apiRoot, project)
109
110	client := &http.Client{
111		Timeout: defaultTimeout,
112	}
113
114	resp, err := client.Get(url)
115	if err != nil {
116		return false, err
117	}
118
119	return resp.StatusCode == http.StatusOK, nil
120}
121
122// extract project name from url
123func splitURL(url string) (string, error) {
124	re, err := regexp.Compile(`launchpad\.net[\/:]([^\/]*[a-z]+)`)
125	if err != nil {
126		panic("regexp compile:" + err.Error())
127	}
128
129	res := re.FindStringSubmatch(url)
130	if res == nil {
131		return "", ErrBadProjectURL
132	}
133
134	return res[1], nil
135}