// ToApiUser converts user to API format.
func ToApiUser(u *models.User) *sdk.User {
	return &sdk.User{
		ID:        u.Id,
		UserName:  u.Name,
		AvatarUrl: string(setting.Protocol) + u.AvatarLink(),
	}
}

func checkUserFollowing(ctx *context.APIContext, u *models.User, followID int64) {
	if u.IsFollowing(followID) {
		ctx.Status(204)
	} else {
		ctx.Status(404)
	}
}

func listUserFollowing(ctx *context.APIContext, u *models.User) {
	users, err := u.GetFollowing(ctx.QueryInt("page"))
	if err != nil {
		ctx.Error(500, "GetFollowing", err)
		return
	}
	responseApiUsers(ctx, users)
}

func ToOrganization(org *models.User) *api.Organization {
	return &api.Organization{
		ID:          org.ID,
		AvatarUrl:   org.AvatarLink(),
		UserName:    org.Name,
		FullName:    org.FullName,
		Description: org.Description,
		Website:     org.Website,
		Location:    org.Location,
	}
}

func listUserOrgs(ctx *context.APIContext, u *models.User, all bool) {
	if err := u.GetOrganizations(all); err != nil {
		ctx.Error(500, "GetOrganizations", err)
		return
	}

	apiOrgs := make([]*api.Organization, len(u.Orgs))
	for i := range u.Orgs {
		apiOrgs[i] = convert.ToOrganization(u.Orgs[i])
	}
	ctx.JSON(200, &apiOrgs)
}

func handleCreateError(ctx *context.Context, owner *models.User, err error, name string, tpl base.TplName, form interface{}) {
	switch {
	case models.IsErrReachLimitOfRepo(err):
		ctx.RenderWithErr(ctx.Tr("repo.form.reach_limit_of_creation", owner.RepoCreationNum()), tpl, form)
	case models.IsErrRepoAlreadyExist(err):
		ctx.Data["Err_RepoName"] = true
		ctx.RenderWithErr(ctx.Tr("form.repo_name_been_taken"), tpl, form)
	case models.IsErrNameReserved(err):
		ctx.Data["Err_RepoName"] = true
		ctx.RenderWithErr(ctx.Tr("repo.form.name_reserved", err.(models.ErrNameReserved).Name), tpl, form)
	case models.IsErrNamePatternNotAllowed(err):
		ctx.Data["Err_RepoName"] = true
		ctx.RenderWithErr(ctx.Tr("repo.form.name_pattern_not_allowed", err.(models.ErrNamePatternNotAllowed).Pattern), tpl, form)
	default:
		ctx.Handle(500, name, err)
	}
}

func parseLoginSource(ctx *context.APIContext, u *models.User, sourceID int64, loginName string) {
	if sourceID == 0 {
		return
	}

	source, err := models.GetLoginSourceByID(sourceID)
	if err != nil {
		if models.IsErrLoginSourceNotExist(err) {
			ctx.Error(422, "", err)
		} else {
			ctx.Error(500, "GetLoginSourceByID", err)
		}
		return
	}

	u.LoginType = source.Type
	u.LoginSource = source.ID
	u.LoginName = loginName
}

// ParseRemoteAddr checks if given remote address is valid,
// and returns composed URL with needed username and passowrd.
// It also checks if given user has permission when remote address
// is actually a local path.
func (f MigrateRepoForm) ParseRemoteAddr(user *models.User) (string, error) {
	remoteAddr := strings.TrimSpace(f.CloneAddr)

	// Remote address can be HTTP/HTTPS/Git URL or local path.
	if strings.HasPrefix(remoteAddr, "http://") ||
		strings.HasPrefix(remoteAddr, "https://") ||
		strings.HasPrefix(remoteAddr, "git://") {
		u, err := url.Parse(remoteAddr)
		if err != nil {
			return "", models.ErrInvalidCloneAddr{IsURLError: true}
		}
		if len(f.AuthUsername)+len(f.AuthPassword) > 0 {
			u.User = url.UserPassword(f.AuthUsername, f.AuthPassword)
		}
		remoteAddr = u.String()
	} else if !user.CanImportLocal() {
		return "", models.ErrInvalidCloneAddr{IsPermissionDenied: true}
	} else if !com.IsDir(remoteAddr) {
		return "", models.ErrInvalidCloneAddr{IsInvalidPath: true}
	}

	return remoteAddr, nil
}

// FIXME: limit size.
func UpdateAvatarSetting(ctx *context.Context, form auth.AvatarForm, ctxUser *models.User) error {
	ctxUser.UseCustomAvatar = form.Source == auth.AVATAR_LOCAL
	if len(form.Gravatar) > 0 {
		ctxUser.Avatar = base.EncodeMD5(form.Gravatar)
		ctxUser.AvatarEmail = form.Gravatar
	}

	if form.Avatar != nil {
		fr, err := form.Avatar.Open()
		if err != nil {
			return fmt.Errorf("Avatar.Open: %v", err)
		}
		defer fr.Close()

		data, err := ioutil.ReadAll(fr)
		if err != nil {
			return fmt.Errorf("ioutil.ReadAll: %v", err)
		}
		if !base.IsImageFile(data) {
			return errors.New(ctx.Tr("settings.uploaded_avatar_not_a_image"))
		}
		if err = ctxUser.UploadAvatar(data); err != nil {
			return fmt.Errorf("UploadAvatar: %v", err)
		}
	} else {
		// No avatar is uploaded but setting has been changed to enable,
		// generate a random one when needed.
		if ctxUser.UseCustomAvatar && !com.IsFile(ctxUser.CustomAvatarPath()) {
			if err := ctxUser.GenerateRandomAvatar(); err != nil {
				log.Error(4, "GenerateRandomAvatar[%d]: %v", ctxUser.ID, err)
			}
		}
	}

	if err := models.UpdateUser(ctxUser); err != nil {
		return fmt.Errorf("UpdateUser: %v", err)
	}

	return nil
}