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	if params.BaseURL != "" {
 33		fmt.Println("warning: --base-url is ineffective for a Launchpad bridge")
 34	}
 35
 36	conf := make(core.Configuration)
 37	var err error
 38	var project string
 39
 40	switch {
 41	case params.Project != "":
 42		project = params.Project
 43	case params.URL != "":
 44		// get project name from url
 45		project, err = splitURL(params.URL)
 46	default:
 47		// get project name from terminal prompt
 48		project, err = promptProjectName()
 49	}
 50
 51	if err != nil {
 52		return nil, err
 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[core.ConfigKeyTarget] = target
 65	conf[keyProject] = project
 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 v, ok := conf[core.ConfigKeyTarget]; !ok {
 77		return fmt.Errorf("missing %s key", core.ConfigKeyTarget)
 78	} else if v != target {
 79		return fmt.Errorf("unexpected target name: %v", v)
 80	}
 81
 82	if _, ok := conf[keyProject]; !ok {
 83		return fmt.Errorf("missing %s key", keyProject)
 84	}
 85
 86	return nil
 87}
 88
 89func promptProjectName() (string, error) {
 90	for {
 91		fmt.Print("Launchpad project name: ")
 92
 93		line, err := bufio.NewReader(os.Stdin).ReadString('\n')
 94		if err != nil {
 95			return "", err
 96		}
 97
 98		line = strings.TrimRight(line, "\n")
 99
100		if line == "" {
101			fmt.Println("Project name is empty")
102			continue
103		}
104
105		return line, nil
106	}
107}
108
109func validateProject(project string) (bool, error) {
110	url := fmt.Sprintf("%s/%s", apiRoot, project)
111
112	client := &http.Client{
113		Timeout: defaultTimeout,
114	}
115
116	resp, err := client.Get(url)
117	if err != nil {
118		return false, err
119	}
120
121	return resp.StatusCode == http.StatusOK, nil
122}
123
124// extract project name from url
125func splitURL(url string) (string, error) {
126	re, err := regexp.Compile(`launchpad\.net[\/:]([^\/]*[a-z]+)`)
127	if err != nil {
128		panic("regexp compile:" + err.Error())
129	}
130
131	res := re.FindStringSubmatch(url)
132	if res == nil {
133		return "", ErrBadProjectURL
134	}
135
136	return res[1], nil
137}