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