numerus/pkg/company.go

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package pkg
import (
"context"
"errors"
"github.com/julienschmidt/httprouter"
"html/template"
"net/http"
"net/url"
"strconv"
)
const (
ContextCompanyKey = "numerus-company"
)
type Company struct {
Id int
CurrencySymbol string
DecimalDigits int
Slug string
}
func CompanyHandler(next http.Handler) httprouter.Handle {
return func(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
company := &Company{
Slug: params[0].Value,
}
conn := getConn(r)
err := conn.QueryRow(r.Context(), "select company_id, currency_symbol, decimal_digits from company join currency using (currency_code) where slug = $1", company.Slug).Scan(&company.Id, &company.CurrencySymbol, &company.DecimalDigits)
if err != nil {
http.NotFound(w, r)
return
}
ctx := context.WithValue(r.Context(), ContextCompanyKey, company)
r = r.WithContext(ctx)
r2 := new(http.Request)
*r2 = *r
r2.URL = new(url.URL)
*r2.URL = *r.URL
r2.URL.Path = params[1].Value
next.ServeHTTP(w, r2)
}
}
func (c Company) MinCents() float64 {
var r float64
r = 1
for i := 0; i < c.DecimalDigits; i++ {
r /= 10.0
}
return r
}
func getCompany(r *http.Request) *Company {
company := r.Context().Value(ContextCompanyKey)
if company == nil {
return nil
}
return company.(*Company)
}
type CurrencyOption struct {
Code string
Symbol string
}
type CountryOption struct {
Code string
Name string
}
type Tax struct {
Id int
Name string
Class string
Rate int
}
type taxDetailsForm struct {
*contactForm
Currency *SelectField
}
func newTaxDetailsForm(ctx context.Context, conn *Conn, locale *Locale) *taxDetailsForm {
return &taxDetailsForm{
contactForm: newContactForm(ctx, conn, locale),
Currency: &SelectField{
Name: "currency",
Label: pgettext("input", "Currency", locale),
Options: MustGetOptions(ctx, conn, "select currency_code, currency_symbol from currency order by currency_code"),
Required: true,
Selected: []string{"EUR"},
},
}
}
func (form *taxDetailsForm) Parse(r *http.Request) error {
if err := form.contactForm.Parse(r); err != nil {
return err
}
form.Currency.FillValue(r)
return nil
}
func (form *taxDetailsForm) Validate(ctx context.Context, conn *Conn) bool {
validator := newFormValidator()
validator.CheckValidSelectOption(form.Currency, gettext("Selected currency is not valid.", form.locale))
return form.contactForm.Validate(ctx, conn) && validator.AllOK()
}
func (form *taxDetailsForm) mustFillFromDatabase(ctx context.Context, conn *Conn, company *Company) *taxDetailsForm {
err := conn.QueryRow(ctx, "select business_name, substr(vatin::text, 3), trade_name, phone, email, web, address, city, province, postal_code, country_code, currency_code from company where company_id = $1", company.Id).Scan(form.BusinessName, form.VATIN, form.TradeName, form.Phone, form.Email, form.Web, form.Address, form.City, form.Province, form.PostalCode, form.Country, form.Currency)
if err != nil {
panic(err)
}
return form
}
type TaxDetailsPage struct {
DetailsForm *taxDetailsForm
NewTaxForm *taxForm
Taxes []*Tax
}
func GetCompanyTaxDetailsForm(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
mustRenderTaxDetailsForm(w, r, newTaxDetailsFormFromDatabase(r))
}
func newTaxDetailsFormFromDatabase(r *http.Request) *taxDetailsForm {
locale := getLocale(r)
conn := getConn(r)
form := newTaxDetailsForm(r.Context(), conn, locale)
company := mustGetCompany(r)
form.mustFillFromDatabase(r.Context(), conn, company)
return form
}
func HandleCompanyTaxDetailsForm(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
locale := getLocale(r)
conn := getConn(r)
form := newTaxDetailsForm(r.Context(), conn, locale)
if err := form.Parse(r); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
if err := verifyCsrfTokenValid(r); err != nil {
http.Error(w, err.Error(), http.StatusForbidden)
return
}
if ok := form.Validate(r.Context(), conn); !ok {
w.WriteHeader(http.StatusUnprocessableEntity)
mustRenderTaxDetailsForm(w, r, form)
return
}
company := mustGetCompany(r)
conn.MustExec(r.Context(), "update company set business_name = $1, vatin = ($11 || $2)::vatin, trade_name = $3, phone = parse_packed_phone_number($4, $11), email = $5, web = $6, address = $7, city = $8, province = $9, postal_code = $10, country_code = $11, currency_code = $12 where company_id = $13", form.BusinessName, form.VATIN, form.TradeName, form.Phone, form.Email, form.Web, form.Address, form.City, form.Province, form.PostalCode, form.Country, form.Currency, company.Id)
http.Redirect(w, r, companyURI(company, "/tax-details"), http.StatusSeeOther)
return
}
func mustRenderTaxDetailsForm(w http.ResponseWriter, r *http.Request, form *taxDetailsForm) {
page := &TaxDetailsPage{
DetailsForm: form,
NewTaxForm: newTaxForm(r.Context(), getConn(r), mustGetCompany(r), getLocale(r)),
}
mustRenderTexDetailsPage(w, r, page)
}
func mustRenderTaxForm(w http.ResponseWriter, r *http.Request, form *taxForm) {
page := &TaxDetailsPage{
DetailsForm: newTaxDetailsFormFromDatabase(r),
NewTaxForm: form,
}
mustRenderTexDetailsPage(w, r, page)
}
func mustRenderTexDetailsPage(w http.ResponseWriter, r *http.Request, page *TaxDetailsPage) {
conn := getConn(r)
company := mustGetCompany(r)
page.Taxes = mustGetTaxes(r.Context(), conn, company)
mustRenderAppTemplate(w, r, "tax-details.gohtml", page)
}
func mustGetCompany(r *http.Request) *Company {
company := getCompany(r)
if company == nil {
panic(errors.New("company: required but not found"))
}
2023-01-27 00:08:03 +00:00
return company
}
func mustGetTaxes(ctx context.Context, conn *Conn, company *Company) []*Tax {
rows, err := conn.Query(ctx, "select tax_id, tax.name, tax_class.name, (rate * 100)::integer from tax join tax_class using (tax_class_id) where tax.company_id = $1 order by rate, tax.name", company.Id)
if err != nil {
panic(err)
}
defer rows.Close()
var taxes []*Tax
for rows.Next() {
tax := &Tax{}
err = rows.Scan(&tax.Id, &tax.Name, &tax.Class, &tax.Rate)
if err != nil {
panic(err)
}
taxes = append(taxes, tax)
}
if rows.Err() != nil {
panic(rows.Err())
}
return taxes
}
type taxForm struct {
locale *Locale
Name *InputField
Class *SelectField
Rate *InputField
}
func newTaxForm(ctx context.Context, conn *Conn, company *Company, locale *Locale) *taxForm {
return &taxForm{
locale: locale,
Name: &InputField{
Name: "tax_name",
Label: pgettext("input", "Tax name", locale),
Type: "text",
Required: true,
},
Class: &SelectField{
Name: "tax_class",
Label: pgettext("input", "Tax Class", locale),
Options: MustGetOptions(ctx, conn, "select tax_class_id::text, name from tax_class where company_id = $1 order by name", company.Id),
Required: true,
EmptyLabel: gettext("Select a tax class", locale),
},
Rate: &InputField{
Name: "tax_rate",
Label: pgettext("input", "Rate (%)", locale),
Type: "number",
Required: true,
Attributes: []template.HTMLAttr{
"min=-99",
"max=99",
},
},
}
}
func (form *taxForm) Parse(r *http.Request) error {
if err := r.ParseForm(); err != nil {
return err
}
form.Name.FillValue(r)
form.Class.FillValue(r)
form.Rate.FillValue(r)
return nil
}
func (form *taxForm) Validate() bool {
validator := newFormValidator()
validator.CheckRequiredInput(form.Name, gettext("Tax name can not be empty.", form.locale))
validator.CheckValidSelectOption(form.Class, gettext("Selected tax class is not valid.", form.locale))
if validator.CheckRequiredInput(form.Rate, gettext("Tax rate can not be empty.", form.locale)) {
validator.CheckValidInteger(form.Rate, -99, 99, gettext("Tax rate must be an integer between -99 and 99.", form.locale))
}
return validator.AllOK()
}
func HandleDeleteCompanyTax(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
taxId, err := strconv.Atoi(params[0].Value)
if err != nil {
http.NotFound(w, r)
return
}
if err := verifyCsrfTokenValid(r); err != nil {
http.Error(w, err.Error(), http.StatusForbidden)
return
}
conn := getConn(r)
conn.MustExec(r.Context(), "delete from tax where tax_id = $1", taxId)
http.Redirect(w, r, companyURI(mustGetCompany(r), "/tax-details"), http.StatusSeeOther)
}
func HandleAddCompanyTax(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
locale := getLocale(r)
conn := getConn(r)
company := mustGetCompany(r)
form := newTaxForm(r.Context(), conn, company, locale)
if err := form.Parse(r); err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
if err := verifyCsrfTokenValid(r); err != nil {
http.Error(w, err.Error(), http.StatusForbidden)
return
}
if !form.Validate() {
w.WriteHeader(http.StatusUnprocessableEntity)
mustRenderTaxForm(w, r, form)
return
}
conn.MustExec(r.Context(), "insert into tax (company_id, tax_class_id, name, rate) values ($1, $2, $3, $4 / 100::decimal)", company.Id, form.Class, form.Name, form.Rate.Integer())
http.Redirect(w, r, companyURI(company, "/tax-details"), http.StatusSeeOther)
}