530 lines
16 KiB
Go
530 lines
16 KiB
Go
package pkg
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import (
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"bytes"
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"context"
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"fmt"
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"github.com/julienschmidt/httprouter"
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"html/template"
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"io"
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"log"
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"math"
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"net/http"
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"os/exec"
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"strconv"
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"strings"
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"time"
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)
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type InvoiceEntry struct {
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Slug string
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Date time.Time
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Number string
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Total string
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CustomerName string
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CustomerSlug string
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Status string
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StatusLabel string
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}
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type InvoicesIndexPage struct {
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Invoices []*InvoiceEntry
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}
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func IndexInvoices(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
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page := &InvoicesIndexPage{
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Invoices: mustCollectInvoiceEntries(r.Context(), getConn(r), mustGetCompany(r), getLocale(r)),
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}
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mustRenderAppTemplate(w, r, "invoices/index.gohtml", page)
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}
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func mustCollectInvoiceEntries(ctx context.Context, conn *Conn, company *Company, locale *Locale) []*InvoiceEntry {
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rows := conn.MustQuery(ctx, "select invoice.slug, invoice_date, invoice_number, contact.business_name, contact.slug, invoice.invoice_status, isi18n.name, to_price(total, decimal_digits) from invoice join contact using (contact_id) join invoice_status_i18n isi18n on invoice.invoice_status = isi18n.invoice_status and isi18n.lang_tag = $2 join invoice_amount using (invoice_id) join currency using (currency_code) where invoice.company_id = $1 order by invoice_date desc, invoice_number desc", company.Id, locale.Language.String())
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defer rows.Close()
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var entries []*InvoiceEntry
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for rows.Next() {
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entry := &InvoiceEntry{}
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if err := rows.Scan(&entry.Slug, &entry.Date, &entry.Number, &entry.CustomerName, &entry.CustomerSlug, &entry.Status, &entry.StatusLabel, &entry.Total); err != nil {
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panic(err)
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}
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entries = append(entries, entry)
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}
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if rows.Err() != nil {
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panic(rows.Err())
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}
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return entries
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}
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func ServeInvoice(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
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locale := getLocale(r)
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conn := getConn(r)
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company := mustGetCompany(r)
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form := newInvoiceForm(r.Context(), conn, locale, company)
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slug := params[0].Value
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if slug == "new" {
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form.Date.Val = time.Now().Format("2006-01-02")
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w.WriteHeader(http.StatusOK)
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mustRenderNewInvoiceForm(w, r, form)
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return
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}
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pdf := false
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if strings.HasSuffix(slug, ".pdf") {
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pdf = true
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slug = slug[:len(slug)-len(".pdf")]
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}
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invoice := mustGetInvoice(r.Context(), conn, company, slug)
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if invoice == nil {
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http.NotFound(w, r)
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return
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}
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if pdf {
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cmd := exec.Command("weasyprint", "--format", "pdf", "--stylesheet", "web/static/invoice.css", "-", "-")
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var stderr bytes.Buffer
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cmd.Stderr = &stderr
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stdin, err := cmd.StdinPipe()
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if err != nil {
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panic(err)
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}
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stdout, err := cmd.StdoutPipe()
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if err != nil {
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panic(err)
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}
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defer mustClose(stdout)
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if err = cmd.Start(); err != nil {
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panic(err)
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}
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go func() {
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defer mustClose(stdin)
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mustRenderAppTemplate(stdin, r, "invoices/view.gohtml", invoice)
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}()
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w.Header().Set("Content-Type", "application/pdf")
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if _, err = io.Copy(w, stdout); err != nil {
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panic(err)
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}
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if err := cmd.Wait(); err != nil {
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log.Printf("ERR - %v\n", stderr.String())
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panic(err)
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}
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} else {
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mustRenderAppTemplate(w, r, "invoices/view.gohtml", invoice)
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}
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}
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func mustClose(closer io.Closer) {
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if err := closer.Close(); err != nil {
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panic(err)
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}
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}
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type invoice struct {
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Number string
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Slug string
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Date time.Time
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Invoicer taxDetails
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Invoicee taxDetails
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Notes string
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Products []*invoiceProduct
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Subtotal string
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Taxes [][]string
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Total string
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}
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type taxDetails struct {
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Name string
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VATIN string
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Address string
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City string
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PostalCode string
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Province string
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Email string
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Phone string
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}
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type invoiceProduct struct {
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Name string
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Description string
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Price string
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Quantity int
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Total string
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}
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func mustGetInvoice(ctx context.Context, conn *Conn, company *Company, slug string) *invoice {
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inv := &invoice{
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Slug: slug,
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}
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var invoiceId int
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var decimalDigits int
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if notFoundErrorOrPanic(conn.QueryRow(ctx, "select invoice_id, decimal_digits, invoice_number, invoice_date, notes, business_name, vatin, phone, email, address, city, province, postal_code, to_price(subtotal, decimal_digits), to_price(total, decimal_digits) from invoice join contact using (contact_id) join invoice_amount using (invoice_id) join currency using (currency_code) where invoice.slug = $1", slug).Scan(&invoiceId, &decimalDigits, &inv.Number, &inv.Date, &inv.Notes, &inv.Invoicee.Name, &inv.Invoicee.VATIN, &inv.Invoicee.Phone, &inv.Invoicee.Email, &inv.Invoicee.Address, &inv.Invoicee.City, &inv.Invoicee.Province, &inv.Invoicee.PostalCode, &inv.Subtotal, &inv.Total)) {
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return nil
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}
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if err := conn.QueryRow(ctx, "select business_name, vatin, phone, email, address, city, province, postal_code from company where company_id = $1", company.Id).Scan(&inv.Invoicer.Name, &inv.Invoicer.VATIN, &inv.Invoicer.Phone, &inv.Invoicer.Email, &inv.Invoicer.Address, &inv.Invoicer.City, &inv.Invoicer.Province, &inv.Invoicer.PostalCode); err != nil {
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panic(err)
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}
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if err := conn.QueryRow(ctx, "select array_agg(array[name, to_price(amount, $2)]) from invoice_tax_amount join tax using (tax_id) where invoice_id = $1", invoiceId, decimalDigits).Scan(&inv.Taxes); err != nil {
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panic(err)
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}
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rows := conn.MustQuery(ctx, "select name, description, to_price(price, $2), quantity, to_price(round(price * quantity * (1 - discount_rate))::integer, 2) from invoice_product where invoice_id = $1", invoiceId, decimalDigits)
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defer rows.Close()
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for rows.Next() {
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product := &invoiceProduct{}
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if err := rows.Scan(&product.Name, &product.Description, &product.Price, &product.Quantity, &product.Total); err != nil {
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panic(err)
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}
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inv.Products = append(inv.Products, product)
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}
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if rows.Err() != nil {
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panic(rows.Err())
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}
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return inv
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}
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type newInvoicePage struct {
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Form *invoiceForm
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Subtotal string
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Taxes [][]string
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Total string
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}
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func newNewInvoicePage(form *invoiceForm, r *http.Request) *newInvoicePage {
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page := &newInvoicePage{
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Form: form,
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}
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conn := getConn(r)
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company := mustGetCompany(r)
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err := conn.QueryRow(r.Context(), "select subtotal, taxes, total from compute_new_invoice_amount($1, $2)", company.Id, NewInvoiceProductArray(form.Products)).Scan(&page.Subtotal, &page.Taxes, &page.Total)
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if err != nil {
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panic(err)
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}
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return page
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}
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func mustRenderNewInvoiceForm(w http.ResponseWriter, r *http.Request, form *invoiceForm) {
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locale := getLocale(r)
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form.Customer.EmptyLabel = gettext("Select a customer to bill.", locale)
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page := newNewInvoicePage(form, r)
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mustRenderAppTemplate(w, r, "invoices/new.gohtml", page)
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}
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func mustRenderNewInvoiceProductsForm(w http.ResponseWriter, r *http.Request, form *invoiceForm) {
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conn := getConn(r)
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company := mustGetCompany(r)
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page := newInvoiceProductsPage{
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Form: form,
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Products: mustGetProductChoices(r.Context(), conn, company),
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}
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mustRenderAppTemplate(w, r, "invoices/products.gohtml", page)
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}
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func mustGetProductChoices(ctx context.Context, conn *Conn, company *Company) []*productChoice {
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rows := conn.MustQuery(ctx, "select product.product_id, product.name, to_price(price, decimal_digits) from product join company using (company_id) join currency using (currency_code) where company_id = $1 order by name", company.Id)
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defer rows.Close()
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var choices []*productChoice
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for rows.Next() {
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entry := &productChoice{}
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if err := rows.Scan(&entry.Id, &entry.Name, &entry.Price); err != nil {
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panic(err)
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}
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choices = append(choices, entry)
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}
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if rows.Err() != nil {
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panic(rows.Err())
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}
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return choices
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}
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type newInvoiceProductsPage struct {
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Form *invoiceForm
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Products []*productChoice
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}
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type productChoice struct {
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Id int
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Name string
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Price string
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}
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func HandleAddInvoice(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
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locale := getLocale(r)
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conn := getConn(r)
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company := mustGetCompany(r)
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form := newInvoiceForm(r.Context(), conn, locale, company)
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if err := form.Parse(r); err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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if err := verifyCsrfTokenValid(r); err != nil {
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http.Error(w, err.Error(), http.StatusForbidden)
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return
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}
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if !form.Validate() {
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w.WriteHeader(http.StatusUnprocessableEntity)
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mustRenderNewInvoiceForm(w, r, form)
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return
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}
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slug := conn.MustGetText(r.Context(), "", "select add_invoice($1, $2, $3, $4, $5, $6)", company.Id, form.Number, form.Date, form.Customer, form.Notes, NewInvoiceProductArray(form.Products))
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http.Redirect(w, r, companyURI(company, "/invoices/"+slug), http.StatusSeeOther)
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}
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func HandleNewInvoiceAction(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
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locale := getLocale(r)
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conn := getConn(r)
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company := mustGetCompany(r)
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form := newInvoiceForm(r.Context(), conn, locale, company)
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if err := form.Parse(r); err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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if err := verifyCsrfTokenValid(r); err != nil {
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http.Error(w, err.Error(), http.StatusForbidden)
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return
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}
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switch r.Form.Get("action") {
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case "update":
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form.Update()
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w.WriteHeader(http.StatusOK)
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mustRenderNewInvoiceForm(w, r, form)
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case "select-products":
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w.WriteHeader(http.StatusOK)
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mustRenderNewInvoiceProductsForm(w, r, form)
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case "add-products":
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form.AddProducts(r.Context(), conn, r.Form["id"])
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w.WriteHeader(http.StatusOK)
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mustRenderNewInvoiceForm(w, r, form)
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default:
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http.Error(w, gettext("Invalid action", locale), http.StatusBadRequest)
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}
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}
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type invoiceForm struct {
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locale *Locale
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company *Company
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Customer *SelectField
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Number *InputField
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Date *InputField
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Notes *InputField
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Tax *SelectField
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Products []*invoiceProductForm
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}
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func newInvoiceForm(ctx context.Context, conn *Conn, locale *Locale, company *Company) *invoiceForm {
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return &invoiceForm{
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locale: locale,
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company: company,
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Customer: &SelectField{
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Name: "customer",
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Label: pgettext("input", "Customer", locale),
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Required: true,
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Options: MustGetOptions(ctx, conn, "select contact_id::text, business_name from contact where company_id = $1 order by business_name", company.Id),
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},
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Number: &InputField{
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Name: "number",
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Label: pgettext("input", "Number", locale),
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Type: "text",
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Required: false,
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},
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Date: &InputField{
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Name: "date",
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Label: pgettext("input", "Invoice Date", locale),
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Type: "date",
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Required: true,
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},
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Notes: &InputField{
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Name: "description",
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Label: pgettext("input", "Notes", locale),
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Type: "textarea",
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},
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Tax: &SelectField{
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Name: "text",
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Label: pgettext("input", "Taxes", locale),
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Multiple: true,
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Options: mustGetTaxOptions(ctx, conn, company),
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},
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}
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}
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func (form *invoiceForm) Parse(r *http.Request) error {
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if err := r.ParseForm(); err != nil {
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return err
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}
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form.Customer.FillValue(r)
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form.Number.FillValue(r)
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form.Date.FillValue(r)
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form.Notes.FillValue(r)
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if _, ok := r.Form["product.id.0"]; ok {
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for index := 0; true; index++ {
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if _, ok := r.Form["product.id."+strconv.Itoa(index)]; !ok {
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break
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}
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productForm := newInvoiceProductForm(index, form.company, form.locale, form.Tax.Options)
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if err := productForm.Parse(r); err != nil {
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return err
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}
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form.Products = append(form.Products, productForm)
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}
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}
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return nil
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}
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func (form *invoiceForm) Validate() bool {
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validator := newFormValidator()
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validator.CheckValidSelectOption(form.Customer, gettext("Name can not be empty.", form.locale))
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if validator.CheckRequiredInput(form.Date, gettext("Invoice date can not be empty.", form.locale)) {
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validator.CheckValidDate(form.Date, gettext("Invoice date must be a valid date.", form.locale))
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}
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validator.CheckValidSelectOption(form.Tax, gettext("Selected tax is not valid.", form.locale))
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allOK := validator.AllOK()
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for _, product := range form.Products {
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allOK = product.Validate() && allOK
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}
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return allOK
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}
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func (form *invoiceForm) Update() {
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products := form.Products
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form.Products = nil
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for n, product := range products {
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if product.Quantity.Val != "0" {
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if n != len(form.Products) {
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product.Reindex(len(form.Products))
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}
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form.Products = append(form.Products, product)
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}
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}
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}
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func (form *invoiceForm) AddProducts(ctx context.Context, conn *Conn, productsId []string) {
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index := len(form.Products)
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rows := conn.MustQuery(ctx, "select product_id, name, description, to_price(price, decimal_digits), 1 as quantity, 0 as discount, array_remove(array_agg(tax_id), null) from product join company using (company_id) join currency using (currency_code) left join product_tax using (product_id) where product_id = any ($1) group by product_id, name, description, price, decimal_digits", productsId)
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defer rows.Close()
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for rows.Next() {
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product := newInvoiceProductForm(index, form.company, form.locale, form.Tax.Options)
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if err := rows.Scan(product.ProductId, product.Name, product.Description, product.Price, product.Quantity, product.Discount, product.Tax); err != nil {
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panic(err)
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}
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form.Products = append(form.Products, product)
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index++
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}
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if rows.Err() != nil {
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panic(rows.Err())
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}
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}
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func mustGetTaxOptions(ctx context.Context, conn *Conn, company *Company) []*SelectOption {
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return MustGetOptions(ctx, conn, "select tax_id::text, name from tax where company_id = $1 order by name", company.Id)
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}
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type invoiceProductForm struct {
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locale *Locale
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company *Company
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ProductId *InputField
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Name *InputField
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Description *InputField
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Price *InputField
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Quantity *InputField
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Discount *InputField
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Tax *SelectField
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}
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func newInvoiceProductForm(index int, company *Company, locale *Locale, taxOptions []*SelectOption) *invoiceProductForm {
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form := &invoiceProductForm{
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locale: locale,
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company: company,
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ProductId: &InputField{
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Label: pgettext("input", "Id", locale),
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Type: "hidden",
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Required: true,
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},
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Name: &InputField{
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Label: pgettext("input", "Name", locale),
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Type: "text",
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Required: true,
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},
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Description: &InputField{
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Label: pgettext("input", "Description", locale),
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Type: "textarea",
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},
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Price: &InputField{
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Label: pgettext("input", "Price", locale),
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Type: "number",
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Required: true,
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Attributes: []template.HTMLAttr{
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`min="0"`,
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template.HTMLAttr(fmt.Sprintf(`step="%v"`, company.MinCents())),
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},
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},
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Quantity: &InputField{
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Label: pgettext("input", "Quantity", locale),
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Type: "number",
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Required: true,
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Attributes: []template.HTMLAttr{
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`min="0"`,
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},
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},
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Discount: &InputField{
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Label: pgettext("input", "Discount (%)", locale),
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Type: "number",
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Required: true,
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Attributes: []template.HTMLAttr{
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`min="0"`,
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`max="100"`,
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},
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},
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Tax: &SelectField{
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Label: pgettext("input", "Taxes", locale),
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Multiple: true,
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Options: taxOptions,
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},
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}
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form.Reindex(index)
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return form
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}
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func (form *invoiceProductForm) Reindex(index int) {
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suffix := "." + strconv.Itoa(index)
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form.ProductId.Name = "product.id" + suffix
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form.Name.Name = "product.name" + suffix
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form.Description.Name = "product.description" + suffix
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form.Price.Name = "product.price" + suffix
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form.Quantity.Name = "product.quantity" + suffix
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form.Discount.Name = "product.discount" + suffix
|
|
form.Tax.Name = "product.tax" + suffix
|
|
}
|
|
|
|
func (form *invoiceProductForm) Parse(r *http.Request) error {
|
|
if err := r.ParseForm(); err != nil {
|
|
return err
|
|
}
|
|
form.ProductId.FillValue(r)
|
|
form.Name.FillValue(r)
|
|
form.Description.FillValue(r)
|
|
form.Price.FillValue(r)
|
|
form.Quantity.FillValue(r)
|
|
form.Discount.FillValue(r)
|
|
form.Tax.FillValue(r)
|
|
return nil
|
|
}
|
|
|
|
func (form *invoiceProductForm) Validate() bool {
|
|
validator := newFormValidator()
|
|
validator.CheckRequiredInput(form.Name, gettext("Name can not be empty.", form.locale))
|
|
if validator.CheckRequiredInput(form.Price, gettext("Price can not be empty.", form.locale)) {
|
|
validator.CheckValidDecimal(form.Price, form.company.MinCents(), math.MaxFloat64, gettext("Price must be a number greater than zero.", form.locale))
|
|
}
|
|
if validator.CheckRequiredInput(form.Quantity, gettext("Quantity can not be empty.", form.locale)) {
|
|
validator.CheckValidInteger(form.Quantity, 1, math.MaxInt32, gettext("Quantity must be a number greater than zero.", form.locale))
|
|
}
|
|
if validator.CheckRequiredInput(form.Discount, gettext("Discount can not be empty.", form.locale)) {
|
|
validator.CheckValidInteger(form.Discount, 0, 100, gettext("Discount must be a percentage between 0 and 100.", form.locale))
|
|
}
|
|
validator.CheckValidSelectOption(form.Tax, gettext("Selected tax is not valid.", form.locale))
|
|
return validator.AllOK()
|
|
}
|