package pkg import ( "context" "errors" "github.com/julienschmidt/httprouter" "html/template" "math" "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 PaymentMethod struct { Id int Name string Instructions string } type taxDetailsForm struct { *contactForm Currency *SelectField InvoiceNumberFormat *InputField NextInvoiceNumber *InputField QuoteNumberFormat *InputField NextQuoteNumber *InputField LegalDisclaimer *InputField } 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"}, }, InvoiceNumberFormat: &InputField{ Name: "invoice_number_format", Label: pgettext("input", "Invoice number format", locale), Type: "text", Required: true, }, NextInvoiceNumber: &InputField{ Name: "next_invoice_number", Label: pgettext("input", "Next invoice number", locale), Type: "number", Required: true, Attributes: []template.HTMLAttr{ "min=1", }, }, QuoteNumberFormat: &InputField{ Name: "quote_number_format", Label: pgettext("input", "Quotation number format", locale), Type: "text", Required: true, }, NextQuoteNumber: &InputField{ Name: "next_quotation_number", Label: pgettext("input", "Next quotation number", locale), Type: "number", Required: true, Attributes: []template.HTMLAttr{ "min=1", }, }, LegalDisclaimer: &InputField{ Name: "legal_disclaimer", Label: pgettext("input", "Legal disclaimer", locale), Type: "textarea", }, } } func (form *taxDetailsForm) Parse(r *http.Request) error { if err := form.contactForm.Parse(r); err != nil { return err } form.Currency.FillValue(r) form.InvoiceNumberFormat.FillValue(r) form.NextInvoiceNumber.FillValue(r) form.QuoteNumberFormat.FillValue(r) form.NextQuoteNumber.FillValue(r) form.LegalDisclaimer.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)) validator.CheckRequiredInput(form.InvoiceNumberFormat, gettext("Invoice number format can not be empty.", form.locale)) validator.CheckValidInteger(form.NextInvoiceNumber, 1, math.MaxInt32, gettext("Next invoice number must be a number greater than zero.", form.locale)) validator.CheckRequiredInput(form.QuoteNumberFormat, gettext("Quotation number format can not be empty.", form.locale)) validator.CheckValidInteger(form.NextQuoteNumber, 1, math.MaxInt32, gettext("Next quotation number must be a number greater than zero.", 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 , invoice_number_format , quote_number_format , legal_disclaimer , coalesce(invoice_number_counter.currval, 0) + 1 , coalesce(quote_number_counter.currval, 0) + 1 from company left join invoice_number_counter on invoice_number_counter.company_id = company.company_id and invoice_number_counter.year = date_part('year', current_date) left join quote_number_counter on quote_number_counter.company_id = company.company_id and quote_number_counter.year = date_part('year', current_date) where company.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, form.InvoiceNumberFormat, form.QuoteNumberFormat, form.LegalDisclaimer, form.NextInvoiceNumber, form.NextQuoteNumber, ) if err != nil { panic(err) } return form } type TaxDetailsPage struct { DetailsForm *taxDetailsForm NewTaxForm *taxForm Taxes []*Tax NewPaymentMethodForm *paymentMethodForm PaymentMethods []*PaymentMethod } 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 { if !IsHTMxRequest(r) { w.WriteHeader(http.StatusUnprocessableEntity) } mustRenderTaxDetailsForm(w, r, form) return } company := mustGetCompany(r) tx := conn.MustBegin(r.Context()) defer tx.MustRollback(r.Context()) tx.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 , invoice_number_format = $13 , quote_number_format = $14 , legal_disclaimer = $15 where company_id = $16 `, form.BusinessName, form.VATIN, form.TradeName, form.Phone, form.Email, form.Web, form.Address, form.City, form.Province, form.PostalCode, form.Country, form.Currency, form.InvoiceNumberFormat, form.QuoteNumberFormat, form.LegalDisclaimer, company.Id) tx.MustExec(r.Context(), ` insert into invoice_number_counter (company_id, year, currval) values ($1, date_part('year', current_date), $2) on conflict (company_id, year) do update set currval = excluded.currval `, company.Id, form.NextInvoiceNumber.Integer()-1) tx.MustExec(r.Context(), ` insert into quote_number_counter (company_id, year, currval) values ($1, date_part('year', current_date), $2) on conflict (company_id, year) do update set currval = excluded.currval `, company.Id, form.NextQuoteNumber.Integer()-1) tx.MustCommit(r.Context()) if IsHTMxRequest(r) { w.Header().Set(HxTrigger, "closeModal") w.WriteHeader(http.StatusNoContent) } else { http.Redirect(w, r, companyURI(company, "/tax-details"), http.StatusSeeOther) } } func mustRenderTaxDetailsForm(w http.ResponseWriter, r *http.Request, form *taxDetailsForm) { conn := getConn(r) locale := getLocale(r) page := &TaxDetailsPage{ DetailsForm: form, NewTaxForm: newTaxForm(r.Context(), conn, mustGetCompany(r), locale), NewPaymentMethodForm: newPaymentMethodForm(locale), } mustRenderTexDetailsPage(w, r, page) } func mustRenderTaxForm(w http.ResponseWriter, r *http.Request, form *taxForm) { page := &TaxDetailsPage{ DetailsForm: newTaxDetailsFormFromDatabase(r), NewTaxForm: form, NewPaymentMethodForm: newPaymentMethodForm(getLocale(r)), } mustRenderTexDetailsPage(w, r, page) } func mustRenderPaymentMethodForm(w http.ResponseWriter, r *http.Request, form *paymentMethodForm) { page := &TaxDetailsPage{ DetailsForm: newTaxDetailsFormFromDatabase(r), NewTaxForm: newTaxForm(r.Context(), getConn(r), mustGetCompany(r), getLocale(r)), NewPaymentMethodForm: 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) page.PaymentMethods = mustCollectPaymentMethods(r.Context(), conn, company) mustRenderModalTemplate(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 } func mustCollectPaymentMethods(ctx context.Context, conn *Conn, company *Company) []*PaymentMethod { rows, err := conn.Query(ctx, "select payment_method_id, name, instructions from payment_method where company_id = $1 order by name", company.Id) if err != nil { panic(err) } defer rows.Close() var methods []*PaymentMethod for rows.Next() { method := &PaymentMethod{} err = rows.Scan(&method.Id, &method.Name, &method.Instructions) if err != nil { panic(err) } methods = append(methods, method) } if rows.Err() != nil { panic(rows.Err()) } return methods } 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) if IsHTMxRequest(r) { w.WriteHeader(http.StatusOK) } else { 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() { if !IsHTMxRequest(r) { 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()) if IsHTMxRequest(r) { mustRenderTaxForm(w, r, newTaxForm(r.Context(), conn, company, locale)) } else { http.Redirect(w, r, companyURI(company, "/tax-details"), http.StatusSeeOther) } } type paymentMethodForm struct { locale *Locale Name *InputField Instructions *InputField } func newPaymentMethodForm(locale *Locale) *paymentMethodForm { return &paymentMethodForm{ locale: locale, Name: &InputField{ Name: "method_name", Label: pgettext("input", "Payment method name", locale), Type: "text", Required: true, }, Instructions: &InputField{ Name: "method_instructions", Label: pgettext("input", "Instructions", locale), Type: "textarea", Required: true, }, } } func (form *paymentMethodForm) Parse(r *http.Request) error { if err := r.ParseForm(); err != nil { return err } form.Name.FillValue(r) form.Instructions.FillValue(r) return nil } func (form *paymentMethodForm) Validate() bool { validator := newFormValidator() validator.CheckRequiredInput(form.Name, gettext("Payment method name can not be empty.", form.locale)) validator.CheckRequiredInput(form.Instructions, gettext("Payment instructions can not be empty.", form.locale)) return validator.AllOK() } func HandleDeletePaymentMethod(w http.ResponseWriter, r *http.Request, params httprouter.Params) { paymentMethodId, 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 payment_method where payment_method_id = $1", paymentMethodId) if IsHTMxRequest(r) { w.WriteHeader(http.StatusOK) } else { http.Redirect(w, r, companyURI(mustGetCompany(r), "/tax-details"), http.StatusSeeOther) } } func HandleAddPaymentMethod(w http.ResponseWriter, r *http.Request, _ httprouter.Params) { locale := getLocale(r) conn := getConn(r) company := mustGetCompany(r) form := newPaymentMethodForm(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() { if !IsHTMxRequest(r) { w.WriteHeader(http.StatusUnprocessableEntity) } mustRenderPaymentMethodForm(w, r, form) return } conn.MustExec(r.Context(), "insert into payment_method (company_id, name, instructions) values ($1, $2, $3)", company.Id, form.Name, form.Instructions) if IsHTMxRequest(r) { mustRenderPaymentMethodForm(w, r, newPaymentMethodForm(locale)) } else { http.Redirect(w, r, companyURI(company, "/tax-details"), http.StatusSeeOther) } }