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")) } 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) }