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/cache"
 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 *cache.RepoCache, params core.BridgeParams) (core.Configuration, error) {
 26	if params.TokenRaw != "" {
 27		fmt.Println("warning: token params are 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	switch {
 38	case params.Project != "":
 39		project = params.Project
 40	case params.URL != "":
 41		// get project name from url
 42		project, err = splitURL(params.URL)
 43	default:
 44		// get project name from terminal prompt
 45		project, err = promptProjectName()
 46	}
 47
 48	if err != nil {
 49		return nil, err
 50	}
 51
 52	// verify project
 53	ok, err := validateProject(project)
 54	if err != nil {
 55		return nil, err
 56	}
 57	if !ok {
 58		return nil, fmt.Errorf("project doesn't exist")
 59	}
 60
 61	conf[core.ConfigKeyTarget] = target
 62	conf[keyProject] = project
 63
 64	err = l.ValidateConfig(conf)
 65	if err != nil {
 66		return nil, err
 67	}
 68
 69	return conf, nil
 70}
 71
 72func (*Launchpad) ValidateConfig(conf core.Configuration) error {
 73	if v, ok := conf[core.ConfigKeyTarget]; !ok {
 74		return fmt.Errorf("missing %s key", core.ConfigKeyTarget)
 75	} else if v != target {
 76		return fmt.Errorf("unexpected target name: %v", v)
 77	}
 78
 79	if _, ok := conf[keyProject]; !ok {
 80		return fmt.Errorf("missing %s key", keyProject)
 81	}
 82
 83	return nil
 84}
 85
 86func promptProjectName() (string, error) {
 87	for {
 88		fmt.Print("Launchpad project name: ")
 89
 90		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
 91		if err != nil {
 92			return "", err
 93		}
 94
 95		line = strings.TrimRight(line, "\n")
 96
 97		if line == "" {
 98			fmt.Println("Project name is empty")
 99			continue
100		}
101
102		return line, nil
103	}
104}
105
106func validateProject(project string) (bool, error) {
107	url := fmt.Sprintf("%s/%s", apiRoot, project)
108
109	client := &http.Client{
110		Timeout: defaultTimeout,
111	}
112
113	resp, err := client.Get(url)
114	if err != nil {
115		return false, err
116	}
117
118	return resp.StatusCode == http.StatusOK, nil
119}
120
121// extract project name from url
122func splitURL(url string) (string, error) {
123	re, err := regexp.Compile(`launchpad\.net[\/:]([^\/]*[a-z]+)`)
124	if err != nil {
125		panic("regexp compile:" + err.Error())
126	}
127
128	res := re.FindStringSubmatch(url)
129	if res == nil {
130		return "", ErrBadProjectURL
131	}
132
133	return res[1], nil
134}